Traditional Chinese Medicine as an adjunct therapy in the treatment of idiopathic membranous nephropathy: A systematic review and meta-analysis.

Background Idiopathic membranous nephropathy (IMN) is one of the most common causes of nephrotic syndrome in adults involving multiple targets and factors. The effect of conservative nonimmunosuppressive or immunosuppressive therapies is unsatisfactory and with many side effects. Traditional Chinese medicine (TCM) can regulate immune function and improve kidney function. Purpose To evaluate the total effective rate, curative rate, recurrence rate and adverse events of TCM alone or TCM as an adjunctive therapy for IMN. Methods Randomized controlled trials (RCT) comparing either TCM alone or the combination of TCM to western medicine (WM) therapies for patients with IMN were retrieved by searching English and Chinese database. Risk of bias summary was used to assess the methodological quality of eligible studies. Dichotomous data were presented using odds ratios (OR). The primary outcome measure was the total effective rate. Secondary outcomes included curative rate, recurrence rate and adverse events. Results 29 RCTs involving 1883 participants met the inclusion criteria. There was no statistically significant difference between the therapy of TCM alone and WM on the total effective rates ( OR : 2.00; 95% CI : 0.80–4.98; P = 0.14) and curative rate ( OR : 1.66; 95% CI : 0.66–4.22; p = 0.28). However, compared to basic treatment or immunosuppressive therapies alone, results showed that TCM as an adjunctive therapy had beneficial effects on the total effective rate ( OR : 2.59; 95% CI : 1.38–4.86; P = 0.003 and OR : 3.01; 95% CI : 2.25–4.04; P < 0.00001) and curative rate ( OR : 3.01; 95% CI : 1.24–7.28; p = 0.01 and OR : 1.73; 95% CI : 1.10–2.71; p = 0.02). In addition, the combination of TCM treatment could reduce the recurrence rate ( OR : 0.28; 95% CI : 0.12–0.68; P = 0.004) and adverse reactions ( OR : 0.38; 95% CI : 0.27–0.54; p < 0.00001). Conclusion The results indicate that TCM is well-tolerated for the treatment of IMN. However, there remains a need for large-scale and high-quality trials.

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