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The role of infiltrating immune cells in dysfunctional adipose tissue

Tomasz J. Guzik, Dominik S. Skiba, Rhian M. Touyz and 1 more

Cardiovascular Research · 2017 · Review

doi:10.1093/cvr/cvx108

Abstract

Adipose tissue (AT) dysfunction, characterized by loss of its homeostatic functions, is a hallmark of non-communicable diseases. It is characterized by chronic low-grade inflammation and is observed in obesity, metabolic disorders such as insulin resistance and diabetes. While classically it has been identified by increased cytokine or chemokine expression, such as increased MCP-1, RANTES, IL-6, interferon (IFN) gamma or TNFα, mechanistically, immune cell infiltration is a prominent feature of the dysfunctional AT. These immune cells include M1 and M2 macrophages, effector and memory T cells, IL-10 producing FoxP3+ T regulatory cells, natural killer and NKT cells and granulocytes. Immune composition varies, depending on the stage and the type of pathology. Infiltrating immune cells not only produce cytokines but also metalloproteinases, reactive oxygen species, and chemokines that participate in tissue remodelling, cell signalling, and regulation of immunity. The presence of inflammatory cells in AT affects adjacent tissues and organs. In blood vessels, perivascular AT inflammation leads to vascular remodelling, superoxide production, endothelial dysfunction with loss of nitric oxide (NO) bioavailability, contributing to vascular disease, atherosclerosis, and plaque instability. Dysfunctional AT also releases adipokines such as leptin, resistin, and visfatin that promote metabolic dysfunction, alter systemic homeostasis, sympathetic outflow, glucose handling, and insulin sensitivity. Anti-inflammatory and protective adiponectin is reduced. AT may also serve as an important reservoir and possible site of activation in autoimmune-mediated and inflammatory diseases. Thus, reciprocal regulation between immune cell infiltration and AT dysfunction is a promising future therapeutic target.

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From PubMed Central, U.S. National Library of Medicine, as current on Oct 17, 2026. Paragraph numbers are ours, so an answer can point at one.

Introduction

Physiologically, adipose tissue (AT) stores energy to support metabolic requirements in the times of need. From an evolutionary point of view, this is beneficial, but with increased nutrient intake and reduced energy expenditure in our modern world, AT function becomes altered leading to obesity. Such alteration is a result of complex interactions of metabolic and immune factors. Understanding of the importance of immunity in metabolic regulation, and the role of metabolism in immune regulation, underlies the rapidly developing biological field of immunometabolism. For example, T cell or M1 macrophage activation is typically associated with a switch from oxidative phosphorylation to anaerobic glycolysis. This has been reviewed in depth elsewhere,, and, in the present paper, we will focus on the role of interactions of immune cells with dysfunctional AT.

AT can be typically classified as white, brown, or beige based on its metabolic activity, number of mitochondria, and uncoupling protein 1 (UCP-1) content, all of which affect adipocyte size and function. Brown AT plays a key role in thermogenesis, while white AT serves primarily for lipid storage. Brown AT is sparse in adult humans, in contrast to its periaortic location in rodents. In spite of this, the protective properties of brown fat have been demonstrated in cardiovascular disease. White AT is widely distributed as visceral (VAT) and subcutaneous AT (SAT). These compartments differ in their functional importance for metabolic health and in their immunometabolic properties. VAT is metabolically more active than SAT and it harbours significantly more immune cells in both health and pathology. This is closely linked with increased glucose uptake and fatty acid generation in VAT and greater adrenergic innervation, all of which are important in the regulation of insulin sensitivity. SAT in turn absorbs circulating free fatty acids and triglycerides. Numerous studies have shown that the retroperitoneal content of VAT is linked to cardiovascular risk. This is mediated by chronic low-grade inflammation, characterized by an excessive immune cell infiltration, overproduction of detrimental adipokines and cytokines (TNF-α, IL-6) that can be detected systemically as biomarkers of inflammation., Mechanistically such low-grade inflammation alters metabolic functions of AT, leading not only to insulin resistance and diabetes but also to cardiovascular pathology., More recently, attention has been focused on a very specific compartment of VAT, the perivascular AT (pVAT), due to its close proximity to blood vessels and its unique embryonic origin from vascular smooth muscle cell SM22+ precursors. Dynamic interplay between white and beige/brown adipocytes within pVAT results in unique metabolic and pro-inflammatory properties that make pVAT an important regulator of vascular function and plaque stability. Human perivascular coronary adipocytes exhibit reduced differentiation, more irregular shape, and smaller size than in the SAT or typical peri-renal VAT. This translates into smaller lipid droplet accumulation and increased synthetic capacity. pVAT provides a microenvironment for recruitment and activation of immune cells which in concert with adipokines affect vascular tone and other aspects of vascular homeostasis.

In summary, all compartments of AT: SAT, VAT as well as pVAT serve physiological functions in vascular and metabolic homeostasis. When these protective functions are disturbed, dysfunctional AT promotes the development of metabolic and vascular disease (Figure 1).

Physiological roles of immune cells in AT

In health, AT contains numerous cell types, including not only adipocytes but also endothelial cells, fibroblasts, pre-adipocytes, stem cells, and regulatory/naive immune cells. Immune cells including M2 macrophages and T regulatory cells (Treg) release anti-inflammatory cytokines such as interleukin (IL)-10 and transforming growth factor beta (TGF-β), which increase insulin sensitivity and inhibit AT inflammation and dysfunction (Figure 1). In lean conditions, M2 cells are characterized by a lack of CD11c and the presence of CD206 and arginase 1. M2 and Treg polarization are reciprocally enhanced in physiological conditions by adiponectin released from IAT. IL-10 modulates insulin signalling through insulin receptor/IRS1-IRS2/PI3-kinase/Akt/FOXO1, in the context of hepatic gluconeogenesis and lipid synthesis. These actions are partially direct and in part indirect, through modulation of TNF, IL-6, IL-1β, and M1 macrophage polarization. M2 macrophages control adipocyte lipolysis. Upon cold exposure, M2 macrophages secrete catecholamines, to stimulate adipocyte lipolysis. This is important because, in concert with eosinophils, M2 macrophages can orchestrate generation of beige AT. As discussed above, in lean, insulin-sensitive AT T cells present are primarily T regulatory cells that secrete IL-10 and transforming growth factor-β (TGFβ) and Th2 cells producing anti-inflammatory cytokines such as IL-4, IL-5, IL-13, and IL-10. These play an important role in homeostasis of AT. Tregs in normal AT have a unique mRNA expression profile, characterizing their regulatory function, such as CD25, glucocorticoid-induced tumor necrosis factor receptor (GITR), cytotoxic T lymphocyte antigen-4 (CTLA-4), killer cell lectin-like receptor G1 and OX40 in addition to classical FoxP3. T regs also exhibit chemokine sensitivity as evidenced by high CC chemokine receptor expression. Other immune cells in lean AT include potentially protective eosinophils and to a lesser extent neutrophils. To date, the role of these cells has been less well defined. Likewise, the role of immune cells present in healthy pVAT in the regulation of vascular function has not yet been clearly defined, apart from potential effects on the release of protective adipokines from adipocytes. Immune cell content in lean subcutaneous AT has also been described but is very low. Dynamic changes of immune cells in the AT underpin their involvement in pathologies associated with AT dysfunction.

Defining dysfunctional AT

Functional changes within the AT associated with altered paracrine and endocrine properties contribute to the development of cardiovascular disease and cancer.,ATdysfunction is thus characterized by decreased release of homeostatic protective factors such as adiponectin, nitric oxide, or protective prostaglandins and increased activation of stress-related pathways leading to pathological adipokine release (resistin, visfatin, leptin) and development of low-grade inflammation (Figure 1), which is not only a feature of dysfunctional AT but also promotes metabolic and vascular dysfunction. While this phenomenon is particularly evident in pVAT, it has also been well defined in other VAT depots, in obesity. Adipocyte–immune cell interactions are therefore bi-directional and depend on nutritional mechanisms, neuro-hormonal pathways, and locally secreted humoural factors.,, In pathological conditions, adipocytes produce inflammatory cytokines and extracellular matrix proteins, supporting infiltration and activation of immune cells, therefore, creating an optimal microenvironment for inflammation. At the same time, activated immune cells secrete cytokines that influence adipocyte function, and differentiation and adipokine secretion. Links between adipokines and immune cell infiltration in the AT have been discussed elsewhere and are summarized in Table 1. The characteristics of AT inflammatory responses differ between classical inflammatory disease such as Crohn’s disease and cancer or cardiovascular disease. Common feature is, however, that dysfunctional, inflamed AT provides a microenvironment permissive for the development of pathology. These effects can be localized, for example linking pVAT to adjacent vessel dysfunction in hypertension or atherosclerosis, or systemic, such as the effects of VAT dysfunction on the development of diabetes, cancer, autoimmune diseases, or signalling within the CNS.

Immune cells in AT dysfunction

Immune cells that infiltrate dysfunctional AT are the key drivers of AT inflammation (Figure 2 and Table 2). The cellular players of such responses differ depending on the anatomical location as well as on the type and the stage of pathology.,

Macrophages were the first immune cells identified in AT. They are also the most abundant cell type in typical visceral and subcutaneous AT, representing more than 50% of all leukocytes. Their content in SAT is several folds lower than in typical VAT in both health and disease, suggesting their metabolic role. Resident AT macrophages (ATMs) play immune and scavenger functions. They present antigens to lymphocytes, phagocytose foreign organisms, release antimicrobial peptides, and attract other immune cells to areas of inflammation., In lean animals and humans, ATMs characterized by the surface markers F4/80 or CD68 constitute less than 5% of all AT cells. A dramatic increase (up to 40% of all AT cells) is observed in metabolic stress., Such an increase is also associated with qualitative changes of ATMs. In lean AT, M2-like producing IL-10 macrophages are dispersed, while in dysfunctional AT, M1 macrophages predominate and form crown-like aggregates, surrounding necrotic adipocytes/lipid droplets.,, In pathological conditions, these classically activated, M1 polarized, CD11c+ macrophages increases, produce pro-inflammatory TNF-α and IL-6 and IL1β., Such simple dichotomous division of ATMs into protective M2 and damaging M1 cells appears to be an oversimplification, especially when it concerns human pathology. Several studies point to the role of M2 cells in dysfunctional AT and insulin resistance or vascular remodelling and fibrosis indicating the need for further phenotypic characterization of ATM that may include Ly6C, CD34, CCR2, and CX3CR1. Macrophages also promote further propagation of AT inflammation through numerous humoural and cellular mechanisms including release of metalloproteinases such as ADAMTS13 and others., Discussion continues what proportion of these cells is chemotactically recruited and what proportion is proliferating from resident ATMs.,

Other types of innate immune cells in VAT and pVAT include neutrophils, representing about 2% of visceral stromal, non-adipocyte, cell fraction. In contrast to resident macrophages and dendritic cells (DCs), their presence may be transient, but they may still contribute to insulin resistance (Table 2). Especially, in lean conditions, AT harbours eosinophils and mast cells, cells that are typically involved in allergic reactions. Eosinophils secrete IL-4 and IL-13 and contribute to the anti-inflammatory, insulin-sensitive AT phenotype that supports the expansion of M2 ATMs. Their content in pathology is decreased. Mast cells in turn increase in dysfunctional AT and have been linked to atherosclerosis and metabolic dysfunction by promoting monocyte recruitment.

While the role of macrophages in AT dysfunction is predominantly linked to their innate functions, these cells also serve as antigen-presenting cells leading to the activation of the adaptive immune system in AT. This is particularly evident in pVAT, where tertiary lymphoid structures have been identified., Dendritic cells, which are the most efficient antigen presenting cells, have also been identified both in typical VAT and in pVAT.,, Thus, dysfunctional AT, creates a microenvironment permissive for T and B lymphocyte activation, and lymphocytes constitute the second most abundant immune cell population in VAT. In some diseases, their content in the AT exceeds the number of macrophages, allowing for the propagation of inflammation., T cells that expand in pathology and promote development of insulin resistance, atherosclerosis, and hypertension include predominantly IFN-γ-producing Th1 (CD4+) and Tc1 (CD8+) cells, producing IFNγ and TNF, and IL-17 producing Th17 cells (Figures 1 and 3). These cells initiate an inflammatory cascade that may precede ATM infiltration. Another subset of T cells, key to AT dysfunction, include invariant natural killer T (iNKT) cells (Table 2). These lymphocytes express a semi-invariant TCR and proteins typical of NK cells but recognize lipid and glycolipids presented in the context of CD1d MHC-like molecule. They can produce both Th2- and Th1-type cytokines. In healthy human omentum, up to 10% of T cells are iNKT cells and their number is reduced in patients with obesity and cancer. Their exact role is not fully recognized but link to immune activation by lipids makes them a critical candidates for important immuno-metabolic cells. Recently, gamma-delta (γ/δ TcR) T cells have been demonstrated to represent substantial proportion of T cells in the AT and their number increases in metabolic and vascular pathologies., Importantly, these cells are an important source of strongly pro-inflammatory Il-17 and may further regulate immune responses. T cell presence and activation in dysfunctional AT is also closely linked to inflammasome activation. Nlrp3 in regulates IL-18 and IFN-γ in the AT and promotes effector T cell accumulation in AT. Finally, there is a small number of B cells in the VAT of lean animals, where they provide immunity against infections, including bacteria from peritoneal space. B-cell content increases in dysfunctional AT, where they promote activation of other immune cells and may affect metabolic status (Table 2).

The mechanisms of immune cell recruitment and the metabolic and functional consequences of their presence in AT vary in different pathological conditions which are briefly summarized below.

Immune cells in the AT and metabolic diseases

Obesity

Increased adipocyte size triggers a stress response and release of chemoattractant proteins, such as MCP-1, M-CSF-1, or RANTES, leading to monocyte recruitment and macrophage accumulation.,, As discussed above, Adipokines also induce chemokine expression and have key chemotactic properties themselves (Table 1). There is a correlation between the accumulation of AT macrophages and adipocyte size. Local lipid fluxes are also regulators of ATM recruitment. High levels of free fatty acids (FFA) elevate chemokine secretion from adipocytes inducing macrophage chemotaxis to VAT. FFAs activate TLR4 signalling in adipose cells. In TLR4 knockout mice, AT inflammation is prevented, and these animals are protected against obesity-induced insulin resistance. Finally, hypoxia and oxidative stress in the VAT is characteristic for obesity and can promote chronic inflammation through metabolic and classical chemokine-dependent mechanisms., Apart from chemotaxis, increased macrophage proliferation, and differentiation from preadipocytes can enhance the content of macrophages. Obesity and insulin resistance are characterized by the predominance of M1 macrophages in the VAT., Mechanisms of M1 macrophage polarization in obesity are not entirely clear. Non-esterified fatty acids (NEFA) are produced in AT and increased systemically in obese subjects. NEFA induce the expression of IL-6, while reducing IL-10 (Figure 2). In contrast, PPARγ skews macrophages toward an alternative M2 phenotype by regulating fatty acid storage and, in doing so, reduces obesity and improves insulin resistance (Figure 2).

While the metabolic state plays a role in macrophage recruitment and polarization, ATMs in turn have important effects on AT metabolism (Figure 2). Depletion of macrophages in AT increases the expression of adipose triglyceride lipase (ATGL) and genes regulated by FFAs. Blockade of monocyte recruitment to VAT genetically or pharmacologically, through CCR2 antagonism protects from diet-induced obesity, improves insulin sensitivity, and lowers AT genes expression related to inflammation and AT dysfunction.,, Similarly, selective depletion of M1 macrophages decreases pro-inflammatory genes expression and reduction in crown-like structures in obese AT, and consequently improves insulin sensitivity. Weight loss decreases macrophage content leading to improved insulin sensitivity. Both fasting and bariatric surgery, decrease MCP-1, CSF-3, and genes related to hypoxia (HIF1-α) in AT and consequently reduce the number of ATM cells.

While macrophages are quantitatively the most abundant immune cells in obesity, T cells also play a critical regulatory role. They increase significantly in the AT in obesity and tend to localize around enlarged adipocytes. T cells can interact with ATMs regulating inflammatory responses and metabolic dysfunction. Of importance are the cytotoxic CD8+ T cells that secrete TNF-α, IL-2, IFN-γ, and chemokine RANTES and CD4+ Th1 cells that secrete TNF-α, IL-12, and INF-γ. These cytokines directly affect adipocyte function and promote M1 macrophage polarization. T cell recruitment in obesity is partially mediated by the RANTES–CCR5 axis., T cell infiltration of AT may precede macrophage-dependent inflammation as it is present after 4–5 weeks of high-fat feeding while macrophage influx was observed after 10 weeks. AT T cells infiltration is strongly associated with early reduction of insulin sensitivity and impaired glucose tolerance. In line with this, CD8−/− mice are protected from M1 macrophage AT infiltration and subsequent AT dysfunction in obesity. Indeed, T cell cytokines are essential for macrophage polarization in the setting of classical inflammation. A specific subset of pro-inflammatory T cells (CD153 + PD-1 + CD44hiCD4+) are remarkably increased in the VAT of HFD-fed mice. These osteopontin-producing CD4+ T cells show functional and genetic features of senescent T cells., T cells in obese AT are regulated by NLRP3 inflammasome, which senses obesity-associated danger signals and contributes to obesity-induced inflammation and insulin resistance., These mechanisms also link macrophage activation to T cell role in obesity.

Other immune cells are also increased in AT in obesity. B cell AT infiltration is associated with increased IgG production in the AT. Concentrations of pro-inflammatory IgG2c in serum and VAT are elevated in obese mice. Most importantly, B cells from obese mice transferred into B cell-deficient lean mice induce insulin resistance. Apart from antibody-mediated mechanisms, B cells from obese mice secrete pro-inflammatory cytokines (IL-6 and INF-γ) and can directly regulate T cells and macrophages.

Eosinophils also play an important role in the immune regulation of obesity. Mice lacking eosinophils exhibit weight gain, insulin resistance, and increased proinflammatory M1 macrophages in the AT. At the same time, mice with eosinophilia (overexpressing IL-5) demonstrate decreased adiposity and improved insulin sensitivity when fed a high-fat diet. IL-5 can be produced by AT itself but importantly by innate lymphoid type 2 cells (ILC2s). Deletion of ILC2s causes significant reductions in VAT eosinophils and alternatively activated macrophages M2. Interleukin 33, which promotes activation and recruitment of the ILC2s, leads to ILC2-dependent increases in VAT eosinophils and M2 macrophages. Finally, the role of iNKT cells in obesity is not clear. While they are activated by lipid, iNKT cell number is decreased in obesity and their depletion increases fat deposition, enhances the presence of M1 macrophages in VAT, and increases insulin resistance and glucose intolerance. Adoptive transfer of iNKT cells into obese mice causes weight loss, improvement of glucose tolerance, and insulin sensitivity.

A link between vascular oxidative stress and obesity in the context of insulin resistance was recently reported in mice with vascular smooth muscle-targeted deletion of p22phox subunit of NADPH oxidase. High-fat feeding did not induce weight gain or leptin resistance in these mice which was associated with strongly reduced T-cell infiltration of pVAT. This is important as indicates causal immunometabolic linking vascular dysfunction to obesity suggesting that vascular inflammation may be primary in the development of obesity and insulin resistance., Such wide-spread participation of various immune cells in metabolic regulation demonstrates the complexity of the immune system and AT inflammation in obesity.

Diabetes and insulin resistance

Immune cell infiltration into AT provides an important link among obesity, insulin resistance, and diabetes. The number of macrophages infiltrating AT in obese patients with insulin resistance is higher than in patients with insulin-sensitive obesity, independent of the fat mass. Insulin levels affect AT inflammation during high-fat diet. Progressive macrophage infiltration in VAT preceded increase of insulin in serum, suggesting that AT inflammation is a cause rather than the consequence of insulin resistance. Increasing evidence supports the role of adaptive immunity in insulin resistance and diabetes, through inducing pro-inflammatory cytokines in metabolic organs, such as the AT, liver, muscle, and pancreas. CCR5 knockout mice are protected from insulin resistance induced by high-fat diet and this effect is mediated by reduced effector T cell accumulation with subsequent reduction of ATMs and M2 polarization of persisting macrophages. Clinical studies confirmed that Th1 cells are up-regulated in the AT and peripheral blood from patients with prediabetes or T2DM. Moreover, high fat diet and insulin resistance are associated with accumulation of Th1, Th17, and effector CD8+ lymphocytes in the AT, while anti-inflammatory Th2 and Treg cells are decreased. Combined anti-CD3 and glucosylceramide treatment induces IL-10 and TGF-β, reducing VAT inflammation in obese mice, and improving fasting glucose levels.

Immune cell activation, involving the co-stimulatory molecule CD40 and its ligand CD40L, is particularly important in linking AT inflammation to diabetes. CD40–CD40L interactions promote pancreatic, AT, and vascular inflammation (Figure 3),, increasing the expression of pro-inflammatory cytokines and chemokines (e.g. TNF-α, IL-6, MCP-1), leukotriene B4 at the same time enhancing lipid droplet accumulation and adipogenesis. These effects are mediated by reduced expression of insulin receptor substrate (IRS-1) and glucose transporter type-4 (GLUT-4)., CD40L expressed on T cells may induce AT inflammation and impair insulin sensitivity (Figure 2).

AT immune cells in vascular disease—hypertension and atherosclerosis

Hypertension

Hypertension represents an important example of immuno-metabolic vascular disease. It is associated with obesity and BMI is one of the strongest predictors of increased blood pressure. Many hypertensive subjects are not obese, but present features of metabolic dysregulation. In hypertension with or without obesity, pVAT inflammation is a prominent feature, and is involved in the pathogenesis of vascular dysfunction. This leads to the loss of protective properties of pVAT and promotes loss of endothelium-dependent vasodilatation and enhanced vasoconstriction. These functional changes are linked with morphological alterations, as pVAT becomes synthetic, pro-inflammatory, often de-differentiated, and highly metabolically active (Figure 3). This profile is characterized by changes in adipokines (increased resistin and visfatin and decreased adiponectin and leptin) and increased production of chemokines such as RANTES or IP-10 (CXCL10) that are key for recruitment of activated monocytes/macrophages and CD8+ T cells. Apart from AT-specific factors activating immune system in the pVAT, central nervous system is also involved, which is important in the context of high perivascular sympathetic innervation and its role in hypertension.

In health, the immune cell infiltrate in the pVAT constitutes only about 2% of the stromal vascular fraction (SVF) cells., In vascular pathologies, such as Ang II-induced hypertension, leukocytes in pVAT increase to 7–10% of SVF cells, and, in atherosclerosis, their content reaches up to 10–20%. Hypertension is linked with a significant increase of T cell and antigen presenting cell pVAT infiltration, which mediates endothelial dysfunction and provides a link between hypertension and subsequent atherosclerosis. Dysfunctional endothelium promotes inflammation through a number of NFkB dependent, Notch/Jagged1-regulated integrin, and adhesion molecule expression., Both CD4+ and CD8+ T cell subpopulations are increased in the pVAT in hypertension and express higher levels of proinflammatory cytokines (TNF-α, INF-γ) and CCR5.,, T cell activation and vascular and renal recruitment is essential for the development of AngII-induced hypertension. This is partially mediated by RANTES, similar to obesity and insulin resistance, through which Th1, Tc1, and gamma-delta (γ/δ) T cells, lymphocytes are recruited to the vascular wall. Th17 cells, essential for blood pressure increase, are in turn recruited in a RANTES-independent CCR6, -dependent manner. Th17 cells not only participate in blood pressure increase but also contribute to vascular stiffening observed in hypertension. In contrast, adoptive transfer of suppressive, Tregs prevent AngII-induced hypertension and vascular inflammation and improves vascular function., B cells in pVAT are almost equal in percentage of SVF cells to T cells and their number is increased during hypertension. They may act as antigen-presenting cells, modulating T cell responses, and produce IgG2b and IgG3. Depletion of B cells protects from hypertension. Finally, macrophage infiltration is also significantly increased in hypertensive pVAT. Elevated blood pressure is correlated with pVAT expression of macrophage chemokine receptors CCR2 and its ligands CCL2, CCL7, CCL8, and CCL12. Moreover, the CCR2 antagonist INCB3344,7–9 reduces CCR2 expression and reverses macrophage accumulation in pVAT of mice with hypertension. Macrophages in pVAT in healthy conditions appear to be predominantly unpolarised or skewed towards M2., However, when blood pressure is elevated, the level of both M1 and M2 subpopulations is increased. Macrophage infiltration to the pVAT during hypertension is regulated by T cell-dependent mechanisms as lymphocyte adaptor protein (LNK) deficiency, leading to hyperactivated T cells increased number of macrophages in the aorta and pVAT.

Classical antigen-presenting cells such as DCs are regulators of adaptive immune response may play an important role in initiation of inflammation by interactions with T cells. They occur in small numbers in pVAT in the healthy state and their number increases during hypertension. Elevated oxidative stress leads to endogenous peptide modification by isoketal (isolevuglandin) adduct formation. This occurs in AT, vessels, and kidneys and promotes antigen presentation by dendritic cells precipitating the role of the T cells in hypertension and further development of pVAT inflammation. Blocking the co-stimulation molecules between T cells and dendritic cells prevents pVAT inflammation and decreases blood pressure. Moreover, DCs secrete cytokines such as IL-1β, IL-6, IL-23 which promote polarization of T lymphocytes to Th17 cells, which plays particular role in hypertension development. Thus, hypertension and associated vascular dysfunction result from complex interactions between several cell types involved in inflammatory responses in hypertension. All types of cells discussed above coexist together in pVAT and they can interact with each other initiating inflammation and causing development of vascular dysfunction and disease.

The effector mechanisms linking infiltrating immune cells to AT dysfunction in hypertension are related to the release of effector cytokines such as IL-17A, IFNγ, TNF-α, and IL-6., These cytokines also impair endothelium-dependent relaxation as demonstrated in ex vivo studies, as well as in vivo using INF-γ knockout mice., IL-6 is also necessary for Th17 cell differentiation. IL-17, a key pro-hypertensive cytokine, is a potent activator of the endothelial cells promoting the expression of adhesion molecules. IL-17A activates RhoA/Rho-kinase and increases inhibitory eNOS Thr495 phosphorylation in endothelial cells leading to decreased NO production. Inflammatory cytokines modulate smooth muscle cell constriction, proliferation, and migration. They also affect adipokines release from AT. For example, TNFα, IL-6, and IL-17A can all inhibit expression and release of adiponectin. One of the key adipokines, leptin, has a structure similar to IL-6, IL-12, IL-15 and can affect leukocyte activation and chemotaxis, release of oxygen radicals, VSMC proliferation, and expression of adhesion molecules on endothelial and vascular smooth muscle cells. IL-17A and TNF increase leptin and resistin production in AT which upregulate the expression of VCAM1 and ICAM and/or induction of CCL2 as well as endothelin-1 from endothelial cells and can induce vascular dysfunction and oxidative stress., All these mechanisms, besides promoting pVAT dysfunction, provide a link between hypertension and atherosclerosis, in part independently of blood pressure.

Atherosclerosis

PVAT is dysfunctional at all stages of atherogenesis. Increased levels of chemerin, visfatin, leptin, and vaspin are correlated with atherosclerosis development. At early stages of atherosclerosis macrophages, T cells and dendritic cells are recruited into perivascular adventita and AT surrounding vasculature. This precedes development of endothelial dysfunction and oxidative stress, and can be modified by interventions targeting numerous metabolic functions such as Ang(1-7)., Such perivascular inflammation of AT continues to be observed at later stages of the disease, with further increase of macrophage and B cell content., In a pivotal early study, Galkina et al. observed high leukocytes number in aorta with pVAT in old ApoE−/− mice in advanced atherosclerosis., Perivascular inflammation, in particular T cell dependent, correlates with lesion size and is clearly age dependent,, and T cell depletion prevents atherosclerosis. Leukocyte infiltration to pVAT in atherosclerosis is mediated by similar mechanisms to those observed in hypertension. IL-8, RANTES, and MCP-1 are all increased in the pVAT from arteries with atherosclerotic plaques. We have recently described a key role of increase in M1 macrophage polarization in early atherosclerosis in the pVAT and measures to reduce pVAT M1 macrophage differentiation prevent plaque formation. Pro-inflammatory IL-17A-producing T cells are present in the adventitia and blockade of IL-17A leads to reduction of macrophage accumulation and atherosclerosis. At early stages, leukocytes are scattered throughout the PVAT,, however, with age they seem to organize to form perivascular arterial tertiary lymphoid organs (ATLO),, which can serve also suppressive functions or become dysfunctional. Molecular mechanisms of pVAT inflammation in atherosclerosis indicate several key targets linking immune responses to metabolic dysfunction. Signal transducer and activator transcription 4 (STAT4) is expressed in adipocytes and immune cells and can participate in PVAT inflammation. STAT4 deficiency reduces development of atherosclerosis and PVAT inflammation in ApoE−/− mouse and in insulin resistant obese Zucker rats. Interestingly, the number of CD8+ T cells is increased in pVAT of Apoe-/-mice indicating that in metabolic disease, hypertension, and atherosclerosis CD8 cells play a particularly important regulatory role. Recently, an important regulatory function has been attributed to myeloid-derived suppressor cells that can affect AT inflammation. Finally, the role of B cells has recently been clarified in atherosclerosis. B cells may serve as an important source of antibodies which promote plaque inflammation and development but can also contribute to antigen presentation and are important source of humoural factors such as TNF. The complexity of immunity of atherosclerosis is reviewed elshewhere.,

AT immune cells in immune and inflammatory disorders

Autoimmune and inflammatory diseases are typically associated with metabolic dysregulation. This is particularly evident in psoriasis, ankylosing spondylitis and rheumatoid arthritis and is linked with development of metabolic syndrome. Psoriasis is associated with significant perivascular, global arterial, and SAT inflammation. Similarly, AT in rheumatoid arthritis is highly infiltrated with macrophages which form crown-like structures. These macrophages are activated and express mixed characteristics with high levels of TNF, IL-1beta, but also IL-10. These macrophages secrete chemokines (CCL2 and RANTES) as well as IL-6, IL-8, MMP-3. These factors further promote macrophage infiltration and can mediate T cell recruitment and activation. T regulatory cells resident in AT may serve an important role in maintaining self-tolerance, and their impairment may promote development of autoimmunity. This mechanism may link epidemiological suggestions of links between obesity and autoimmune diseases. A key unanswered question is whether adipose tissue in autoimmune disease can create a microenviroment for T cell activation and participate in the pathogenesis of autoimmune disease, or if it is a mere manifestation of systemic inflammation.

Ectopic fat depots and chronic inflammation

Ectopic AT is the visceral fat surrounding intraabdominal organs and located in the liver, heart, pancreas, and muscles. Its presence is linked to low-grade inflammation and cardio-metabolic complications commonly experienced in type 2 diabetes. In particular, non-alcoholic fatty liver disease constitutes an important risk determinant for cardiometabolic risk. Myocardial triglyceride, epicardial, and pericardial fat depots accumulate with increasing amount of liver fat and VAT. Thus, the association of LV diastolic function with hepatic ectopic fat may be an indicator of systemic inflammation. Ectopic fat accumulation in the liver is linked to the infiltration of the γ/δ+ T cells, granulocytes, and CD11b+ cells in mice. It appears that IL-6 regulates recruitment of these cells and IL-17 production in the liver that promotes ectopic fat. This is in part regulated by decreased microRNAs (miR) such as miR26a, providing a link to cardiac injury. Similar regulatory properties have been attributed to other miRs expressed in the AT and cardiovascular system., The inflammatory nature of epicardial AT has been known for years, and is supported by numerous molecular mechanisms. Only recently, however, have we started appreciating the heterogeneity of epicardial AT which is particularly linked to its pro-inflammatory properties., It may also underlie a link between subclinical atherosclerosis and epicardial fat thickness and hepatic steatosis. Thus, ectopic fat accumulation in and around the heart, kidneys, muscles, and liver is a marker of increased cardiovascular risk likely linked to chronic inflammation. At the same time, through the release of adipokines and chemokines, it attracts pro-inflammatory cells like IL-17 producing γ/δ+ T cells, which contribute to the pathology.

Translational evidence

While most of data regarding immune cell infiltration of AT originate from animal models, the role of immune cells has been clearly demonstrated in humans. Similar to animal models, macrophages constitute about 4% of the total AT stromal visceral fraction and it increases up to 15% in obesity. There are, however, some key differences in the characteristics of immune cells infiltrating human AT. In contrast to animal studies, an ‘M2-type’ macrophage with remodelling capacity (e.g. through TGF-β and IL-10 release), but also able to secrete proinflammatory cytokines, has been identified in obese AT in humans. These mixed-type macrophages have CD11c+CD206+ characteristics but are pro-inflammatory and linked with insulin resistance in human obesity. T cell infiltration in human AT is much less characterized. AT T cells correlate with BMI, their recruitment is dependent on RANTES chemokine and functionally affects adipocyte and pre-adipocyte differentiation and function. Detailed characteristics, activation mechanisms, and effector functions of effector T cells present in human AT are still poorly defined. Adipokines have been shown to regulate human immune cell activation, for example inhibit IL-17 production from T cells and CD8+ effector cell accumulation (summarized in Table 2).

Interestingly, several studies have recently shown that vascular dysfunction, may regulate AT dysfunction, with immune cell infiltration as a key intermediate step. For example, p22phox overexpression in VSMCs leads to increased diet induced obesity that is mediated by AT T cell infiltration. The same has been shown in humans where oxidative stress derivated such as 5-HNE regulate adiponectin release from AT.,, Significant weight loss, in obese individuals, demonstrates clear links to reduced immune cell infiltration in the AT with concomitant improvement of insulin sensitivity and vascular function. Several clinical studies using immune targeted therapies in patients with type 2 diabetes confirmed experimental suggestions of the causal role of inflammation in insulin resistance and hyperglycaemia. Indeed, in patients with type 2 diabetes treated with IL-1 receptor blocker (Anakinra), IL-1β antagonist (gevokizumab, canakinumab, LY2189102), TNF antagonist (CDP571, Ro 45-2081, etanercept) or IKKβ-NF-κB inhibitor all have been shown to improve metabolic profile providing an important translational evidence.

Conclusions

Over the years, it has become apparent that vascular and metabolic dysfunction occur in a wide range of vascular pathologies and are closely regulated by coincident immune dysregulation. Immune cells infiltrating AT both sense and can induce metabolic disturbances, contributing to a vicious circle of AT dysfunction. Immune infiltration of AT is critical in T2D, obesity or insulin resistance it is also a primary feature of hypertension or atherosclerosis, making immuno-metabolic interventions a valuable therapeutic approach in a wide range of cardiovascular pathologies. While in animal models of metabolic disease, we have now identified the key immune cell subpopulations and their immunometabolic profiles, relatively little is known about human AT infiltration. One challenge is to identify specific immune cell populations within human AT that could be targeted and differences in their characteristics depending on anatomical location. Finally, we need to understand dynamic changes of the role of immune cells at different time points of metabolic and vascular pathology.

While specific therapeutic interventions limiting AT inflammation may be designed based on this,, we already know that commonly used agents, including methotrexate, anti-TNF therapies and leflunomide limit macrophage infiltration in AT. Similarly, several vasoactive therapies such as ACE-inhibitors or angiotensin II receptor blockers have potential to limit inflammation in pVAT. While these approaches lead to systemic immunosuppression, more specific small molecule immune targeted therapies might prove helpful to improve the metabolic profile of AT and prevent AT dysfunction.

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  84. 84.

    Oh DY, Morinaga H, Talukdar S, Bae EJ, Olefsky JM. Increased macrophage migration into adipose tissue in obese mice. Diabetes2012;61:346–354.

    Not in our library10.2337/db11-0860

  85. 85.

    Weber C, Shantsila E, Hristov M, Caligiuri G, Guzik T, Heine GH, Hoefer IE, Monaco C, Peter K, Rainger E, Siegbahn A, Steffens S, Wojta J, Lip GY. Role and analysis of monocyte subsets in cardiovascular disease. Joint consensus document of the European Society of Cardiology (ESC) Working Groups “Atherosclerosis & Vascular Biology”. Thromb Haemost2016;116:626–637.

    Not in our library10.1160/th16-02-0091

  86. 86.

    Eerenberg ES, Teunissen PF, van den Born BJ, Meijers JC, Hollander MR, Jansen M, Tijssen R, Belien JA, van de Ven PM, Aly MF, Kamp O, Niessen HW, Kamphuisen PW, Levi M, van Royen N. The role of ADAMTS13 in acute myocardial infarction: cause or consequence?. Cardiovasc Res2016;111:194–203.

    Not in our library10.1093/cvr/cvw097

  87. 87.

    Duca L, Blaise S, Romier B, Laffargue M, Gayral S, El Btaouri H, Kawecki C, Guillot A, Martiny L, Debelle L, Maurice P. Matrix ageing and vascular impacts: focus on elastin fragmentation. Cardiovasc Res2016;110:298–308.

    Not in our library10.1093/cvr/cvw061

  88. 88.

    Di Gregoli K, George SJ, Jackson CL, Newby AC, Johnson JL. Differential effects of tissue inhibitor of metalloproteinase (TIMP)-1 and TIMP-2 on atherosclerosis and monocyte/macrophage invasion. Cardiovasc Res2016;109:318–330.

    Not in our library10.1093/cvr/cvv268

  89. 89.

    De Caterina R, Madonna R. Von Willebrand factor, ADAMTS13, and coronary microvascular obstruction: beautiful hypotheses, ugly facts. Cardiovasc Res2016;111:169–171.

    Not in our library10.1093/cvr/cvw165

  90. 90.

    Ensan S, Li A, Besla R, Degousee N, Cosme J, Roufaiel M, Shikatani EA, El-Maklizi M, Williams JW, Robins L, Li C, Lewis B, Yun TJ, Lee JS, Wieghofer P, Khattar R, Farrokhi K, Byrne J, Ouzounian M, Zavitz CC, Levy GA, Bauer CM, Libby P, Husain M, Swirski FK, Cheong C, Prinz M, Hilgendorf I, Randolph GJ, Epelman S, Gramolini AO, Cybulsky MI, Rubin BB, Robbins CS. Self-renewing resident arterial macrophages arise from embryonic CX3CR1(+) precursors and circulating monocytes immediately after birth. Nat Immunol2016;17:159–168.

    Not in our library10.1038/ni.3343

  91. 91.

    Robbins CS, Hilgendorf I, Weber GF, Theurl I, Iwamoto Y, Figueiredo JL, Gorbatov R, Sukhova GK, Gerhardt LM, Smyth D, Zavitz CC, Shikatani EA, Parsons M, van Rooijen N, Lin HY, Husain M, Libby P, Nahrendorf M, Weissleder R, Swirski FK. Local proliferation dominates lesional macrophage accumulation in atherosclerosis. Nat Med2013;19:1166–1172.

    Not in our library10.1038/nm.3258

  92. 92.

    Wu J, Grassia G, Cambrook H, Ialenti A, MacRitchie N, Carberry J, Wadsworth RM, Lawrence C, Kennedy S, Maffia P. Perivascular mast cells regulate vein graft neointimal formation and remodeling. PeerJ2015;3:e1192.

    Not in our library10.7717/peerj.1192

  93. 93.

    Bot I, de Jager SC, Zernecke A, Lindstedt KA, van Berkel TJ, Weber C, Biessen EA. Perivascular mast cells promote atherogenesis and induce plaque destabilization in apolipoprotein E-deficient mice. Circulation2007;115:2516–2525.

    Not in our library10.1161/circulationaha.106.660472

  94. 94.

    Layne K, Di Giosia P, Ferro A, Passacquale G. Anti-platelet drugs attenuate the expansion of circulating CD14highCD16+ monocytes under pro-inflammatory conditions. Cardiovasc Res2016;111:26–33.

    Not in our library10.1093/cvr/cvw089

  95. 95.

    Gerhardt T, Ley K. Monocyte trafficking across the vessel wall. Cardiovasc Res2015;107:321–330.

    Not in our library10.1093/cvr/cvv147

  96. 96.
  97. 97.

    Akhavanpoor M, Wangler S, Gleissner CA, Korosoglou G, Katus HA, Erbel C. Adventitial inflammation and its interaction with intimal atherosclerotic lesions. Front Physiol2014;5:296.

    Not in our library10.3389/fphys.2014.00296

  98. 98.

    Bertola A, Ciucci T, Rousseau D, Bourlier V, Duffaut C, Bonnafous S, Blin-Wakkach C, Anty R, Iannelli A, Gugenheim J, Tran A, Bouloumie A, Gual P, Wakkach A. Identification of adipose tissue dendritic cells correlated with obesity-associated insulin-resistance and inducing Th17 responses in mice and patients. Diabetes2012;61:2238–2247.

    Not in our library10.2337/db11-1274

  99. 99.

    Wu H, Ghosh S, Perrard XD, Feng L, Garcia GE, Perrard JL, Sweeney JF, Peterson LE, Chan L, Smith CW, Ballantyne CM. T-cell accumulation and regulated on activation, normal T cell expressed and secreted upregulation in adipose tissue in obesity. Circulation2007;115:1029–1038.

    Not in our library10.1161/circulationaha.106.638379

  100. 100.

    Han JM, Wu D, Denroche HC, Yao Y, Verchere CB, Levings MK. IL-33 reverses an obesity-induced deficit in visceral adipose tissue ST2+ T regulatory cells and ameliorates adipose tissue inflammation and insulin resistance. JI2015;194:4777–4783.

    Not in our library10.4049/jimmunol.1500020

  101. 101.

    Ilan Y, Maron R, Tukpah AM, Maioli TU, Murugaiyan G, Yang K, Wu HY, Weiner HL. Induction of regulatory T cells decreases adipose inflammation and alleviates insulin resistance in ob/ob mice. Proc Natl Acad Sci USA2010;107:9765–9770.

    Not in our library10.1073/pnas.0908771107

  102. 102.

    Li Y, Kanellakis P, Hosseini H, Cao A, Deswaerte V, Tipping P, Toh BH, Bobik A, Kyaw T. A CD1d-dependent lipid antagonist to NKT cells ameliorates atherosclerosis in ApoE−/− mice by reducing lesion necrosis and inflammation. Cardiovasc Res2016;109:305–317.

    Not in our library10.1093/cvr/cvv259

  103. 103.

    Bendelac A, Savage PB, Teyton L. The biology of NKT cells. Annu Rev Immunol2007;25:297–336.

    Not in our library10.1146/annurev.immunol.25.022106.141711

  104. 104.

    Lynch L, O'shea D, Winter DC, Geoghegan J, Doherty DG, O'farrelly C. Invariant NKT cells and CD1d(+) cells amass in human omentum and are depleted in patients with cancer and obesity. Eur J Immunol2009;39:1893–1901.

    Not in our library10.1002/eji.200939349

  105. 105.

    Vieth JA, Das J, Ranaivoson FM, Comoletti D, Denzin LK, Sant'angelo DB. TCRalpha-TCRbeta pairing controls recognition of CD1d and directs the development of adipose NKT cells. Nat Immunol2017;18:36–44.

    Not in our library10.1038/ni.3622

  106. 106.

    Li Y, Wu Y, Zhang C, Li P, Cui W, Hao J, Ma X, Yin Z, Du J. gammadeltaT Cell-derived interleukin-17A via an interleukin-1beta-dependent mechanism mediates cardiac injury and fibrosis in hypertension. Hypertension2014;64:305–314.

    Not in our library10.1161/hypertensionaha.113.02604

  107. 107.

    Vandanmagsar B, Youm YH, Ravussin A, Galgani JE, Stadler K, Mynatt RL, Ravussin E, Stephens JM, Dixit VD. The NLRP3 inflammasome instigates obesity-induced inflammation and insulin resistance. Nat Med2011;17:179–188.

    Not in our library10.1038/nm.2279

  108. 108.

    Exley MA, Hand L, O'shea D, Lynch L. Interplay between the immune system and adipose tissue in obesity. J Endocrinol2014;223:R41–R48.

    Not in our library10.1530/joe-13-0516

  109. 109.

    Skurk T, Alberti-Huber C, Herder C, Hauner H. Relationship between adipocyte size and adipokine expression and secretion. J Clin Endocrinol Metab2007;92:1023–1033.

    Not in our library10.1210/jc.2006-1055

  110. 110.

    McEver RP. Selectins: initiators of leucocyte adhesion and signalling at the vascular wall. Cardiovasc Res2015;107:331–339.

    Not in our library10.1093/cvr/cvv154

  111. 111.

    Kosteli A, Sugaru E, Haemmerle G, Martin JF, Lei J, Zechner R, Ferrante AW. Weight loss and lipolysis promote a dynamic immune response in murine adipose tissue. J Clin Invest2010;120:3466–3479.

    Not in our library10.1172/jci42845

  112. 112.

    Shi H, Kokoeva MV, Inouye K, Tzameli I, Yin H, Flier JS. TLR4 links innate immunity and fatty acid-induced insulin resistance. J Clin Invest2006;116:3015–3025.

    Not in our library10.1172/jci28898

  113. 113.

    Ye JP, Gao ZG, Yin J, He Q. Hypoxia is a potential risk factor for chronic inflammation and adiponectin reduction in adipose tissue of ob/ob and dietary obese mice. Am. J Physiol Endocrinol Metab 2007;293:E1118–E1128.

    Not in our library10.1152/ajpendo.00435.2007

  114. 114.

    O'Rourke RW, White AE, Metcalf MD, Olivas AS, Mitra P, Larison WG, Cheang EC, Varlamov O, Corless CL, Roberts CT, Marks DL. Hypoxia-induced inflammatory cytokine secretion in human adipose tissue stromovascular cells. Diabetologia2011;54:1480–1490.

    Not in our library10.1007/s00125-011-2103-y

  115. 115.

    Amano SU, Cohen JL, Vangala P, Tencerova M, Nicoloro SM, Yawe JC, Shen YF, Czech MP, Aouadi M. Local proliferation of macrophages contributes to obesity-associated adipose tissue inflammation. Cell Metab2014;19:162–171.

    Not in our library10.1016/j.cmet.2013.11.017

  116. 116.
  117. 117.

    Charriere G, Cousin B, Arnaud E, Andre M, Bacou F, Penicaud L, Casteilla L. Preadipocyte conversion to macrophage – evidence of plasticity. J Biol Chem2003;278:9850–9855.

    Not in our library10.1074/jbc.m210811200

  118. 118.

    Nguyen MTA, Favelyukis S, Nguyen AK, Reichart D, Scott PA, Jenn A, Liu-Bryan R, Glass CK, Neels JG, Olefsky JM. A subpopulation of macrophages infiltrates hypertrophic adipose tissue and is activated by free fatty acids via toll-like receptors 2 and 4 and JNK-dependent pathways. J Biol Chem2007;282:35279–35292.

    Not in our library10.1074/jbc.m706762200

  119. 119.

    Odegaard JI, Ricardo-Gonzalez RR, Goforth MH, Morel CR, Subramanian V, Mukundan L, Eagle AR, Vats D, Brombacher F, Ferrante AW, Chawla A. Macrophage-specific PPAR gamma controls alternative activation and improves insulin resistance. Nature2007;447:1116–U1112.

    Not in our library10.1038/nature05894

  120. 120.

    Ito A, Suganami T, Yamauchi A, Degawa-Yamauchi M, Tanaka M, Kouyama R, Kobayashi Y, Nitta N, Yasuda K, Hirata Y, Kuziel WA, Takeya M, Kanegasaki S, Kamei Y, Ogawa Y. Role of CC chemokine receptor 2 in bone marrow cells in the recruitment of macrophages into obese adipose tissue. J Biol Chem2008;283:35715–35723.

    Not in our library10.1074/jbc.m804220200

  121. 121.

    Patsouris D, Li PP, Thapar D, Chapman J, Olefsky JM, Neels JG. Ablation of CD11c-positive cells normalizes insulin sensitivity in obese insulin resistant animals. Cell Metab 2008;8:301–309.

    Not in our library10.1016/j.cmet.2008.08.015

  122. 122.

    Cancello R, Henegar C, Viguerie N, Taleb S, Poitou C, Rouault C, Coupaye M, Pelloux V, Hugol D, Bouillot JL, Bouloumie A, Barbatelli G, Cinti S, Svensson PA, Barsh GS, Zucker JD, Basdevant A, Langin D, Clement K. Reduction of macrophage infiltration and chemoattractant gene expression changes in white adipose tissue of morbidly obese subjects after surgery induced weight loss. Diabetes2005;54:2277–2286.

    Not in our library10.2337/diabetes.54.8.2277

  123. 123.

    Rausch ME, Weisberg S, Vardhana P, Tortoriello DV. Obesity in C57BL/6J mice is characterized by adipose tissue hypoxia and cytotoxic T-cell infiltration. Int J Obes Relat Metab Disord2008;32:451–463.

    Not in our library10.1038/sj.ijo.0803744

  124. 124.

    Monney L, Sabatos CA, Gaglia JL, Ryu A, Waldner H, Chernova T, Manning S, Greenfield EA, Coyle AJ, Sobel RA, Freeman GJ, Kuchroo VK. Th1-specific cell surface protein Tim-3 regulates macrophage activation and severity of an autoimmune disease. Nature2002;415:536–541.

    Not in our library10.1038/415536a

  125. 125.

    Harford KA, Reynolds CM, McGillicuddy FC, Roche HM. Fats, inflammation and insulin resistance: insights to the role of macrophage and T-cell accumulation in adipose tissue. Proc Nutr Soc2011;70:408–417.

    Not in our library10.1017/s0029665111000565

  126. 126.

    Kintscher U, Hartge M, Hess K, Foryst-Ludwig A, Clemenz M, Wabitsch M, Fischer-Posovszky P, Barth TFE, Dragun D, Skurk T, Hauner H, Bluher M, Unger T, Wolf AM, Knippschild U, Hombach V, Marx N. T-lymphocyte infiltration in visceral adipose tissue – a primary event in adipose tissue inflammation and the development of obesity-mediated insulin resistance. Arterioscl Throm Vas2008;28:1304–1310.

    Not in our library10.1161/atvbaha.108.165100

  127. 127.

    Meshkani R, Vakili S. Tissue resident macrophages: key players in the pathogenesis of type 2 diabetes and its complications. Clin Chim Acta2016;462:77–89.

    Not in our library10.1016/j.cca.2016.08.015

  128. 128.

    Shirakawa K, Yan XX, Shinmura K, Endo J, Kataoka M, Katsumata Y, Yamamoto T, Anzai A, Isobe S, Yoshida N, Itoh H, Manabe I, Sekai M, Hamazaki Y, Fukuda K, Minato N, Sano M. Obesity accelerates T cell senescence in murine visceral adipose tissue. J Clin Invest2016;126:4626–4639.

    Not in our library10.1172/jci88606

  129. 129.

    Wei K, Diaz-Trelles R, Liu Q, Diez-Cunado M, Scimia MC, Cai W, Sawada J, Komatsu M, Boyle JJ, Zhou B, Ruiz-Lozano P, Mercola M. Developmental origin of age-related coronary artery disease. Cardiovasc Res2015;107:287–294.

    Not in our library10.1093/cvr/cvv167

  130. 130.

    Jourdan T, Godlewski G, Cinar R, Bertola A, Szanda G, Liu J, Tam J, Han T, Mukhopadhyay B, Skarulis MC, Ju C, Aouadi M, Czech MP, Kunos G. Activation of the Nlrp3 inflammasome in infiltrating macrophages by endocannabinoids mediates beta cell loss in type 2 diabetes. Nat Med2013;19:1132–1140.

    Not in our library10.1038/nm.3265

  131. 131.

    DeFuria J, Belkina AC, Jagannathan-Bogdan M, Snyder-Cappione J, Carr JD, Nersesova YR, Markham D, Strissel KJ, Watkins AA, Zhu M, Allen J, Bouchard J, Toraldo G, Jasuja R, Obin MS, McDonnell ME, Apovian C, Denis GV, Nikolajczyk BS. B cells promote inflammation in obesity and type 2 diabetes through regulation of T-cell function and an inflammatory cytokine profile. P Natl Acad Sci USA2013;110:5133–5138.

    Not in our library10.1073/pnas.1215840110

  132. 132.

    Molofsky AB, Nussbaum JC, Liang HE, Van Dyken SJ, Cheng LE, Mohapatra A, Chawla A, Locksley RM. Innate lymphoid type 2 cells sustain visceral adipose tissue eosinophils and alternatively activated macrophages. J Exp Med2013;210:535–549.

    Not in our library10.1084/jem.20121964

  133. 133.

    Lynch L, Nowak M, Varghese B, Clark J, Hogan AE, Toxavidis V, Balk SP, O'shea D, O'farrelly C, Exley MA. Adipose tissue invariant NKT cells protect against diet-induced obesity and metabolic disorder through regulatory cytokine production. Immunity2012;37:574–587.

    Not in our library10.1016/j.immuni.2012.06.016

  134. 134.

    Youn JY, Siu KL, Lob HE, Itani H, Harrison DG, Cai H. Role of vascular oxidative stress in obesity and metabolic syndrome. Diabetes2014;63:2344–2355.

    Not in our library10.2337/db13-0719

  135. 135.

    Guzik TJ, Olszanecki R, Sadowski J, Kapelak B, Rudzinski P, Jopek A, Kawczynska A, Ryszawa N, Loster J, Jawien J, Czesnikiewicz-Guzik M, Channon KM, Korbut R. Superoxide dismutase activity and expression in human venous and arterial bypass graft vessels. J Physiol Pharmacol2005;56:313–323.

    Not in our library

  136. 136.
  137. 137.

    Kitade H, Sawamoto K, Nagashimada M, Inoue H, Yamamoto Y, Sai Y, Takamura T, Yamamoto H, Miyamoto K, Ginsberg HN, Mukaida N, Kaneko S, Ota T. CCR5 plays a critical role in obesity-induced adipose tissue inflammation and insulin resistance by regulating both macrophage recruitment and M1/M2 status. Diabetes2012;61:1680–1690.

    Not in our library10.2337/db11-1506

  138. 138.

    McLaughlin T, Liu LF, Lamendola C, Shen L, Morton J, Rivas H, Winer D, Tolentino L, Choi O, Zhang H, Chng MHY, Engleman E. T-cell profile in adipose tissue is associated with insulin resistance and systemic inflammation in humans. Arterioscl Throm Vas2014;34:2637–2643.

    Not in our library10.1161/atvbaha.114.304636

  139. 139.

    Seijkens T, Kusters P, Engel D, Lutgens E. CD40-CD40L: linking pancreatic, adipose tissue and vascular inflammation in type 2 diabetes and its complications. Diabetes Vasc Dis Re2013;10:115–122.

    Not in our library10.1177/1479164112455817

  140. 140.

    Poggi M, Engel D, Christ A, Beckers L, Wijnands E, Boon L, Driessen A, Cleutjens J, Weber C, Gerdes N, Lutgens E. CD40L deficiency ameliorates adipose tissue inflammation and metabolic manifestations of obesity in mice. Arterioscl Throm Vas2011;31:2251–U2248.

    Not in our library10.1161/atvbaha.111.231357

  141. 141.

    Donath MY. Targeting inflammation in the treatment of type 2 diabetes: time to start. Nat Rev Drug Discov2014;13:465–476.

    Not in our library10.1038/nrd4275

  142. 142.

    Poggi M, Jager J, Paulmyer-Lacroix O, Peiretti F, Gremeaux T, Verdier M, Grino M, Stepanian A, Msika S, Burcelin R, de Prost D, Tanti JF, Alessi MC. The inflammatory receptor CD40 is expressed on human adipocytes: contribution to crosstalk between lymphocytes and adipocytes. Diabetologia2009;52:1152–1163.

    Not in our library10.1007/s00125-009-1267-1

  143. 143.

    Missiou A, Wolf D, Platzer I, Ernst S, Walter C, Rudolf P, Zirlik K, Kostlin N, Willecke FK, Munkel C, Schonbeck U, Libby P, Bode C, Varo N, Zirlik A. CD40L induces inflammation and adipogenesis in adipose cells – a potential link between metabolic and cardiovascular disease. Thromb Haemost2010;103:788–796.

    Not in our library10.1160/th09-07-0463

  144. 144.

    de Hoog VC, Bovens SM, de Jager SC, van Middelaar BJ, van Duijvenvoorde A, Doevendans PA, Pasterkamp G, de Kleijn DP, Timmers L. BLT1 antagonist LSN2792613 reduces infarct size in a mouse model of myocardial ischaemia-reperfusion injury. Cardiovasc Res2015;108:367–376.

    Not in our library10.1093/cvr/cvv224

  145. 145.

    Harrison DG, Guzik TJ, Lob HE, Madhur MS, Marvar PJ, Thabet SR, Vinh A, Weyand CM. Inflammation, immunity, and hypertension. Hypertension2011;57:132–140.

    Not in our library10.1161/hypertensionaha.110.163576

  146. 146.

    Itani HA, McMaster WG Jr., Saleh MA, Nazarewicz RR, Mikolajczyk TP, Kaszuba AM, Konior A, Prejbisz A, Januszewicz A, Norlander AE, Chen W, Bonami RH, Marshall AF, Poffenberger G, Weyand CM, Madhur MS, Moore DJ, Harrison DG, Guzik TJ. Activation of human T cells in hypertension: studies of humanized mice and hypertensive humans. Hypertension2016;68:123–132.

    Not in our library10.1161/hypertensionaha.116.07237

  147. 147.

    Guzik TJ, Mikolajczyk T. In search of the T cell involved in hypertension and target organ damage. Hypertension2014;64:224–226.

    Not in our library10.1161/hypertensionaha.114.03340

  148. 148.

    Carnevale D, Pallante F, Fardella V, Fardella S, Iacobucci R, Federici M, Cifelli G, De Lucia M, Lembo G. The angiogenic factor PlGF mediates a neuroimmune interaction in the spleen to allow the onset of hypertension. Immunity2014;41:737–752.

    Not in our library10.1016/j.immuni.2014.11.002

  149. 149.

    Marvar PJ, Thabet SR, Guzik TJ, Lob HE, McCann LA, Weyand C, Gordon FJ, Harrison DG. Central and peripheral mechanisms of T-lymphocyte activation and vascular inflammation produced by angiotensin II-induced hypertension. Circ Res2010;107:263–270.

    Not in our library10.1161/circresaha.110.217299

  150. 150.

    Wilk G, Osmenda G, Matusik P, Nowakowski D, Jasiewicz-Honkisz B, Ignacak A, Czesnikiewicz-Guzik M, Guzik TJ. Endothelial function assessment in atherosclerosis: comparison of brachial artery flow-mediated vasodilation and peripheral arterial tonometry. Pol Arch Med Wewn2013;123:443–452.

    Not in our library10.20452/pamw.1879

  151. 151.

    Nus M, Martinez-Poveda B, MacGrogan D, Chevre R, Amato G, Sbroggio M, Rodriguez C, Martinez-Gonzalez J, Andres V, Hidalgo A, Luis de la Pompa J. Endothelial Jag1-RBPJ signalling promotes inflammatory leucocyte recruitment and atherosclerosis. Cardiovasc Res2016;112:568–580.

    Not in our library10.1093/cvr/cvw193

  152. 152.

    Minami T, Satoh K, Nogi M, Kudo S, Miyata S, Tanaka S, Shimokawa H. Statins up-regulate SmgGDS through beta1-integrin/Akt1 pathway in endothelial cells. Cardiovasc Res2016;109:151–161.

    Not in our library10.1093/cvr/cvv253

  153. 153.

    Guzik TJ, Hoch NE, Brown KA, McCann LA, Rahman A, Dikalov S, Goronzy J, Weyand C, Harrison DG. Role of the T cell in the genesis of angiotensin II induced hypertension and vascular dysfunction. J Exp Med2007;204:2449–2460.

    Not in our library10.1084/jem.20070657

  154. 154.

    West NEJ, Qian HS, Guzik TJ, Black E, Cai S, George SE, Channon KM. Nitric oxide synthase (nNOS) gene transfer modifies venous bypass graft remodeling: effects on vascular smooth muscle cell differentiation and superoxide production. Circulation2001;104:1526–1532.

    Not in our library10.1161/hc3801.095693

  155. 155.

    Madhur MS, Lob HE, McCann LA, Iwakura Y, Blinder Y, Guzik TJ, Harrison DG. Interleukin 17 promotes angiotensin II-induced hypertension and vascular dysfunction. Hypertension2010;55:500–507.

    Not in our library10.1161/hypertensionaha.109.145094

  156. 156.

    Wu J, Thabet SR, Kirabo A, Trott DW, Saleh MA, Xiao L, Madhur MS, Chen W, Harrison DG. Inflammation and mechanical stretch promote aortic stiffening in hypertension through activation of p38 mitogen-activated protein kinase. Circ Res2014;114:616–625.

    Not in our library10.1161/circresaha.114.302157

  157. 157.

    Matrougui K, Zakaria AE, Kassan M, Choi S, Nair D, Gonzalez-Villalobos RA, Chentoufi AA, Kadowitz P, Belmadani S, Partyka M. Natural regulatory T cells control coronary arteriolar endothelial dysfunction in hypertensive mice. Am J Pathol2011;178:434–441.

    Not in our library10.1016/j.ajpath.2010.11.034

  158. 158.

    Barhoumi T, Kasal DA, Li MW, Shbat L, Laurant P, Neves MF, Paradis P, Schiffrin EL. T regulatory lymphocytes prevent angiotensin II-induced hypertension and vascular injury. Hypertension2011;57:469–476.

    Not in our library10.1161/hypertensionaha.110.162941

  159. 159.

    Chan CT, Sobey CG, Lieu M, Ferens D, Kett MM, Diep H, Kim HA, Krishnan SM, Lewis CV, Salimova E, Tipping P, Vinh A, Samuel CS, Peter K, Guzik TJ, Kyaw TS, Toh BH, Bobik A, Drummond GR. Obligatory role for B cells in the development of angiotensin II-dependent hypertension. Hypertension2015;66:1023–1033.

    Not in our library10.1161/hypertensionaha.115.05779

  160. 160.

    Chan CT, Moore JP, Budzyn K, Guida E, Diep H, Vinh A, Jones ES, Widdop RE, Armitage JA, Sakkal S, Ricardo SD, Sobey CG, Drummond GR. Reversal of vascular macrophage accumulation and hypertension by a CCR2 antagonist in deoxycorticosterone/salt-treated mice. Hypertension2012;60:1207–1212.

    Not in our library10.1161/hypertensionaha.112.201251

  161. 161.

    Saleh MA, McMaster WG, Wu J, Norlander AE, Funt SA, Thabet SR, Kirabo A, Xiao L, Chen W, Itani HA, Michell D, Huan TX, Zhang YH, Takaki S, Titze J, Levy D, Harrison DG, Madhur MS. Lymphocyte adaptor protein LNK deficiency exacerbates hypertension and end-organ inflammation. J Clin Invest2015;125:1189–1202.

    Not in our library10.1172/jci76327

  162. 162.

    Kirabo A, Fontana V, de Faria APC, Loperena R, Galindo CL, Wu J, Bikineyeva AT, Dikalov S, Xiao L, Chen W, Saleh MA, Trott DW, Itani HA, Vinh A, Amarnath V, Amarnath K, Guzik TJ, Bernstein KE, Shen XZ, Shyr Y, Chen SC, Mernaugh RL, Laffer CL, Elijovich F, Davies SS, Moreno LH, Madhur MS, Roberts J, Harrison DG. DC isoketal-modified proteins activate T cells and promote hypertension. J Clin Invest2014;124:4642–4656.

    Not in our library10.1172/jci74084

  163. 163.

    Vinh A, Chen W, Blinder Y, Weiss D, Taylor WR, Goronzy JJ, Weyand CM, Harrison DG, Guzik TJ. Inhibition and genetic ablation of the B7/CD28 T-cell costimulation axis prevents experimental hypertension. Circulation2010;122:2529–2537.

    Not in our library10.1161/circulationaha.109.930446

  164. 164.

    Lumeng CN, Deyoung SM, Saltiel AR. Macrophages block insulin action in adipocytes by altering expression of signaling and glucose transport proteins. Am J Physiol Endocrinol Metab2007;292:E166–E174.

    Not in our library10.1152/ajpendo.00284.2006

  165. 165.

    Pietrowski E, Bender B, Huppert J, White R, Luhmann HJ, Kuhlmann CR. Pro-inflammatory effects of interleukin-17A on vascular smooth muscle cells involve NAD(P)H- oxidase derived reactive oxygen species. J Vasc Res2011;48:52–58.

    Not in our library10.1159/000317400

  166. 166.

    Bettelli E, Carrier Y, Gao W, Korn T, Strom TB, Oukka M, Weiner HL, Kuchroo VK. Reciprocal developmental pathways for the generation of pathogenic effector TH17 and regulatory T cells. Nature2006;441:235–238.

    Not in our library10.1038/nature04753

  167. 167.

    Roussel L, Houle F, Chan C, Yao Y, Berube J, Olivenstein R, Martin JG, Huot J, Hamid Q, Ferri L, Rousseau S. IL-17 promotes p38 MAPK-dependent endothelial activation enhancing neutrophil recruitment to sites of inflammation. J Immunol2010;184:4531–4537.

    Not in our library10.4049/jimmunol.0903162

  168. 168.

    Nguyen H, Chiasson VL, Chatterjee P, Kopriva SE, Young KJ, Mitchell BM. Interleukin-17 causes Rho-kinase-mediated endothelial dysfunction and hypertension. Cardiovasc Res2013;97:696–704.

    Not in our library10.1093/cvr/cvs422

  169. 169.

    Nosalski R, McGinnigle E, Siedlinski M, Guzik TJ. Novel immune mechanisms in hypertension and cardiovascular risk. Curr Cardiovasc Risk Rep2017;11:12.

    Not in our library10.1007/s12170-017-0537-6

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    Maeda N, Shimomura I, Kishida K, Nishizawa H, Matsuda M, Nagaretani H, Furuyama N, Kondo H, Takahashi M, Arita Y, Komuro R, Ouchi N, Kihara S, Tochino Y, Okutomi K, Horie M, Takeda S, Aoyama T, Funahashi T, Matsuzawa Y. Diet-induced insulin resistance in mice lacking adiponectin/ACRP30. Nat Med2002;8:731–737.

    Not in our library10.1038/nm724

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    Fasshauer M, Kralisch S, Klier M, Lossner U, Bluher M, Klein J, Paschke R. Adiponectin gene expression and secretion is inhibited by interleukin-6 in 3T3-L1 adipocytes. Biochem Biophys Res Commun2003;301:1045–1050.

    Not in our library10.1016/s0006-291x(03)00090-1

  172. 172.

    Noh M. Interleukin-17A increases leptin production in human bone marrow mesenchymal stem cells. Biochem Pharmacol2012;83:661–670.

    Not in our library10.1016/j.bcp.2011.12.010

  173. 173.

    La Cava A, Matarese G. The weight of leptin in immunity. Nat Rev Immunol2004;4:371–379.

    Not in our library10.1038/nri1350

  174. 174.

    Bokarewa M, Nagaev I, Dahlberg L, Smith U, Tarkowski A. Resistin, an adipokine with potent proinflammatory properties. J Immunol2005;174:5789–5795.

    Not in our library10.4049/jimmunol.174.9.5789

  175. 175.

    Spiroglou SG, Kostopoulos CG, Varakis JN, Papadaki HH. Adipokines in periaortic and epicardial adipose tissue: differential expression and relation to atherosclerosis. JAT2010;17:115–130.

    Not in our library10.5551/jat.1735

  176. 176.

    Durpes MC, Morin C, Paquin-Veillet J, Beland R, Pare M, Guimond MO, Rekhter M, King GL, Geraldes P. PKC-beta activation inhibits IL-18-binding protein causing endothelial dysfunction and diabetic atherosclerosis. Cardiovasc Res2015;106:303–313.

    Not in our library10.1093/cvr/cvv107

  177. 177.

    Planavila A, Redondo-Angulo I, Ribas F, Garrabou G, Casademont J, Giralt M, Villarroya F. Fibroblast growth factor 21 protects the heart from oxidative stress. Cardiovasc Res2015;106:19–31.

    Not in our library10.1093/cvr/cvu263

  178. 178.

    Podolec J, Kopec G, Niewiara L, Komar M, Guzik B, Bartus K, Tomkiewicz-Pajak L, Guzik TJ, Plazak W, Zmudka K. Chemokine RANTES is increased at early stages of coronary artery disease. J Physiol Pharmacol2016;67:321–328.

    Not in our library

  179. 179.

    Galkina E, Kadl A, Sanders J, Varughese D, Sarembock IJ, Ley K. Lymphocyte recruitment into the aortic wall before and during development of atherosclerosis is partially L-selectin dependent. J Exp Med2006;203:1273–1282.

    Not in our library10.1084/jem.20052205

  180. 180.

    Moos MPW, John N, Grabner R, Nossmann S, Gunther B, Vollandt D, Funk CD, Kaiser B, Habenicht AJR. The lamina adventitia is the major site of immune cell accumulation in standard chow-fed apolipoprotein E-deficient mice. Arterioscler Thromb Vasc Biol2005;25:2386–2391.

    Not in our library10.1161/01.atv.0000187470.31662.fe

  181. 181.

    Lohmann C, Schafer N, von Lukowicz T, Stein MAS, Boren J, Rutti S, Wahli W, Donath MY, Luscher TF, Matter CM. Atherosclerotic mice exhibit systemic inflammation in periadventitial and visceral adipose tissue, liver, and pancreatic islets. Atherosclerosis2009;207:360–367.

    Not in our library10.1016/j.atherosclerosis.2009.05.004

  182. 182.

    Ketelhuth DF, Hansson GK. Adaptive response of T and B cells in atherosclerosis. Circ Res2016;118:668–678.

    Not in our library10.1161/circresaha.115.306427

  183. 183.

    Henrichot E, Juge-Aubry CE, Pernin AS, Pache JC, Velebit V, Dayer JM, Meda P, Chizzolini C, Meier CA. Production of chemokines by perivascular adipose tissue – a role in the pathogenesis of atherosclerosis?. Arterioscl Throm Vas2005;25:2594–2599.

    Not in our library10.1161/01.atv.0000188508.40052.35

  184. 184.

    Smith E, Prasad KM, Butcher M, Dobrian A, Kolls JK, Ley K, Galkina E. Blockade of interleukin-17A results in reduced atherosclerosis in apolipoprotein E-deficient mice. Circulation2010;121:1746–1755.

    Not in our library10.1161/circulationaha.109.924886

  185. 185.

    Dobrian AD, Hatcher MA, Brotman JJ, Galkina EV, Taghavie-Moghadam P, Pei H, Haynes BA, Nadler JL. STAT4 contributes to adipose tissue inflammation and atherosclerosis. J Endocrinol2015;227:13–24.

    Not in our library10.1530/joe-15-0098

  186. 186.

    Foks AC, Van Puijvelde GH, Wolbert J, Kroner MJ, Frodermann V, Van Der Heijden T, Van Santbrink PJ, Boon L, Bot I, Kuiper J. CD11b+Gr-1+ myeloid-derived suppressor cells reduce atherosclerotic lesion development in LDLr deficient mice. Cardiovasc Res2016;111:252–261.

    Not in our library10.1093/cvr/cvw114

  187. 187.

    Tay C, Liu YH, Hosseini H, Kanellakis P, Cao A, Peter K, Tipping P, Bobik A, Toh BH, Kyaw T. B-cell-specific depletion of tumour necrosis factor alpha inhibits atherosclerosis development and plaque vulnerability to rupture by reducing cell death and inflammation. Cardiovasc Res2016;111:385–397.

    Not in our library10.1093/cvr/cvw186

  188. 188.

    Nus M, Mallat Z. Immune-mediated mechanisms of atherosclerosis and implications for the clinic. Expert Rev Clin Immunol2016;12:1217–1237.

    Not in our library10.1080/1744666x.2016.1195686

  189. 189.

    Malkic Salihbegovic E, Hadzigrahic N, Cickusic AJ. Psoriasis and metabolic syndrome. Med Arh2015;69:85–87.

    Not in our library10.5455/medarh.2015.69.85-87

  190. 190.

    Hjuler KF, Gormsen LC, Vendelbo MH, Egeberg A, Nielsen J, Iversen L. Increased global arterial and subcutaneous adipose tissue inflammation in patients with moderate-to-severe psoriasis. Br J Dermatol2017;176:732–740.

    Not in our library10.1111/bjd.15149

  191. 191.

    Kontny E, Prochorec-Sobieszek M. Articular adipose tissue resident macrophages in rheumatoid arthritis patients: potential contribution to local abnormalities. Rheumatology (Oxford)2013;52:2158–2167.

    Not in our library10.1093/rheumatology/ket287

  192. 192.

    Procaccini C, Carbone F, Galgani M, La Rocca C, De Rosa V, Cassano S, Matarese G. Obesity and susceptibility to autoimmune diseases. Expert Rev Clin Immunol2011;7:287–294.

    Not in our library10.1586/eci.11.18

  193. 193.

    Graner M, Nyman K, Siren R, Pentikainen MO, Lundbom J, Hakkarainen A, Lauerma K, Lundbom N, Nieminen MS, Taskinen MR. Ectopic fat depots and left ventricular function in nondiabetic men with nonalcoholic fatty liver disease. Circ Cardiovasc Imaging2015;8:e001979.

    Not in our library10.1161/circimaging.114.001979

  194. 194.

    He Q, Li F, Li J, Li R, Zhan G, Li G, Du W, Tan H. MicroRNA-26a-interleukin (IL)-6-IL-17 axis regulates the development of non-alcoholic fatty liver disease in a murine model. Clin Exp Immunol2017;187:174–184.

    Not in our library10.1111/cei.12838

  195. 195.

    Crippa S, Nemir M, Ounzain S, Ibberson M, Berthonneche C, Sarre A, Boisset G, Maison D, Harshman K, Xenarios I, Diviani D, Schorderet D, Pedrazzini T. Comparative transcriptome profiling of the injured zebrafish and mouse hearts identifies miRNA-dependent repair pathways. Cardiovasc Res2016;110:73–84.

    Not in our library10.1093/cvr/cvw031

  196. 196.

    Vacca M, Di Eusanio M, Cariello M, Graziano G, D'amore S, Petridis FD, D'orazio A, Salvatore L, Tamburro A, Folesani G, Rutigliano D, Pellegrini F, Sabba C, Palasciano G, Di Bartolomeo R, Moschetta A. Integrative miRNA and whole-genome analyses of epicardial adipose tissue in patients with coronary atherosclerosis. Cardiovasc Res2016;109:228–239.

    Not in our library10.1093/cvr/cvv266

  197. 197.

    Iaconetti C, De Rosa S, Polimeni A, Sorrentino S, Gareri C, Carino A, Sabatino J, Colangelo M, Curcio A, Indolfi C. Down-regulation of miR-23b induces phenotypic switching of vascular smooth muscle cells in vitro and in vivo. Cardiovasc Res2015;107:522–533.

    Not in our library10.1093/cvr/cvv141

  198. 198.

    Hu W, Wang M, Yin H, Yao C, He Q, Yin L, Zhang C, Li W, Chang G, Wang S. MicroRNA-1298 is regulated by DNA methylation and affects vascular smooth muscle cell function by targeting connexin 43. Cardiovasc Res2015;107:534–545.

    Not in our library10.1093/cvr/cvv160

  199. 199.

    Duygu B, Da Costa Martins PA. miR-21: a star player in cardiac hypertrophy. Cardiovasc Res2015;105:235–237.

    Not in our library10.1093/cvr/cvv026

  200. 200.

    Mazurek T, Zhang L, Zalewski A, Mannion JD, Diehl JT, Arafat H, Sarov-Blat L, O'brien S, Keiper EA, Johnson AG, Martin J, Goldstein BJ, Shi Y. Human epicardial adipose tissue is a source of inflammatory mediators. Circulation2003;108:2460–2466.

    Not in our library10.1161/01.cir.0000099542.57313.c5

  201. 201.

    Gaborit B, Venteclef N, Ancel P, Pelloux V, Gariboldi V, Leprince P, Amour J, Hatem SN, Jouve E, Dutour A, Clement K. Human epicardial adipose tissue has a specific transcriptomic signature depending on its anatomical peri-atrial, peri-ventricular, or peri-coronary location. Cardiovasc Res2015;108:62–73.

    Not in our library10.1093/cvr/cvv208

  202. 202.

    Baragetti A, Pisano G, Bertelli C, Garlaschelli K, Grigore L, Fracanzani AL, Fargion S, Norata GD, Catapano AL. Subclinical atherosclerosis is associated with epicardial fat thickness and hepatic steatosis in the general population. Nutr Metab Cardiovasc Dis2016;26:141–153.

    Not in our library10.1016/j.numecd.2015.10.013

  203. 203.

    Harman-Boehm I, Bluher M, Redel H, Sion-Vardy N, Ovadia S, Avinoach E, Shai I, Kloting N, Stumvoll M, Bashan N, Rudich A. Macrophage infiltration into omental versus subcutaneous fat across different populations: effect of regional adiposity and the comorbidities of obesity. J Clin Endocrinol Metab2007;92:2240–2247.

    Not in our library10.1210/jc.2006-1811

  204. 204.

    Zeyda M, Farmer D, Todoric J, Aszmann O, Speiser M, Gyori G, Zlabinger GJ, Stulnig TM. Human adipose tissue macrophages are of an anti-inflammatory phenotype but capable of excessive pro-inflammatory mediator production. Int J Obes Relat Metab Disord2007;31:1420–1428.

    Not in our library10.1038/sj.ijo.0803632

  205. 205.

    Antonopoulos AS, Margaritis M, Coutinho P, Shirodaria C, Psarros C, Herdman L, Sanna F, De Silva R, Petrou M, Sayeed R, Krasopoulos G, Lee R, Digby J, Reilly S, Bakogiannis C, Tousoulis D, Kessler B, Casadei B, Channon KM, Antoniades C. Adiponectin as a link between type 2 diabetes and vascular NADPH oxidase activity in the human arterial wall: the regulatory role of perivascular adipose tissue. Diabetes2015;64:2207–2219.

    Not in our library10.2337/db14-1011

  206. 206.
  207. 207.

    Larsen CM, Faulenbach M, Vaag A, Ehses JA, Donath MY, Mandrup-Poulsen T. Sustained effects of interleukin-1 receptor antagonist treatment in type 2 diabetes. Diabetes Care2009;32:1663–1668.

    Not in our library10.2337/dc09-0533

  208. 208.

    Cavelti-Weder C, Babians-Brunner A, Keller C, Stahel MA, Kurz-Levin M, Zayed H, Solinger AM, Mandrup-Poulsen T, Dinarello CA, Donath MY. Effects of gevokizumab on glycemia and inflammatory markers in type 2 diabetes. Diabetes Care2012;35:1654–1662.

    Not in our library10.2337/dc11-2219

  209. 209.

    Hensen J, Howard CP, Walter V, Thuren T. Impact of interleukin-1 beta antibody (canakinumab) on glycaemic indicators in patients with type 2 diabetes mellitus: Results of secondary endpoints from a randomized, placebo-controlled trial. Diabetes Metab2013;39:524–531.

    Not in our library10.1016/j.diabet.2013.07.003

  210. 210.

    Sloan-Lancaster J, Abu-Raddad E, Polzer J, Miller JW, Scherer JC, De Gaetano A, Berg JK, Landschulz WH. Double-blind, randomized study evaluating the glycemic and anti-inflammatory effects of subcutaneous LY2189102, a neutralizing IL-1 beta antibody, in patients with type 2 diabetes. Diabetes Care2013;36:2239–2246.

    Not in our library10.2337/dc12-1835

  211. 211.

    Ofei F, Hurel S, Newkirk J, Sopwith M, Taylor R. Effects of an engineered human anti-TNF-alpha antibody (CDP571) on insulin sensitivity and glycemic control in patients with NIDDM. Diabetes1996;45:881–885.

    Not in our library10.2337/diab.45.7.881

  212. 212.

    Paquot N, Castillo MJ, Lefebvre PJ, Scheen AJ. No increased insulin sensitivity after a single intravenous administration of a recombinant human tumor necrosis factor receptor: Fc fusion protein in obese insulin-resistant patients. J Clin Endocrinol Metab2000;85:1316–1319.

    Not in our library10.1210/jcem.85.3.6417

  213. 213.

    Dominguez H, Storgaard H, Rask-Madsen C, Hermann TS, Ihlemann N, Nielsen DB, Spohr C, Kober L, Vaag A, Torp-Pedersen C. Metabolic and vascular effects of tumor necrosis factor-alpha blockade with etanercept in obese patients with type 2 diabetes. J Vasc Res2005;42:517–525.

    Not in our library10.1159/000088261

  214. 214.

    Goldfine AB, Fonseca V, Jablonski KA, Chen YDI, Tipton L, Staten MA, Shoelson SE, Salsa TIU. Salicylate (Salsalate) in patients with type 2 diabetes. Ann Intern Med2013;159:1.

    Not in our library10.7326/0003-4819-159-1-201307020-00003

  215. 215.

    Passacquale G, Di Giosia P, Ferro A. The role of inflammatory biomarkers in developing targeted cardiovascular therapies: lessons from the cardiovascular inflammation reduction trials. Cardiovasc Res2016;109:9–23.

    Not in our library10.1093/cvr/cvv227

  216. 216.

    Lewis DR, Petersen LK, York AW, Ahuja S, Chae H, Joseph LB, Rahimi S, Uhrich KE, Haser PB, Moghe PV. Nanotherapeutics for inhibition of atherogenesis and modulation of inflammation in atherosclerotic plaques. Cardiovasc Res2016;109:283–293.

    Not in our library10.1093/cvr/cvv237

  217. 217.

    Giles JT, Ferrante AW, Broderick R, Zartoshti A, Rose J, Downer K, Zhang HZ, Winchester RJ. Adipose tissue macrophages in rheumatoid arthritis: prevalence, disease related indicators, and associations with cardiometabolic risk factors. Arthritis Care Res (Hoboken)2017; doi: 10.1002/acr.23253.

    Not in our library10.1002/acr.23253

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