Meta-Analysis of Tripterygium Wilfordii Hook F in the Immunosuppressive Treatment of IgA Nephropathy

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Objective Numerous Chinese patients with IgA nephropathy (IgAN) have benefited from Tripterygium wilfordii Hook F (TwHF) from two decades ago. However, to date there is no systematic evaluation of this remedy for IgAN. Methods We conducted a meta-analysis of all eligible randomized clinical trials (RCTs) to assess the effect of TwHF on IgAN for the first time. In August 2009 a systematic search was performed among eight electronic databases. Review Manager (RevMan) version 5.0 was used. Results (i) Four eligible RCTs with 188 participants were included; (ii) The validities of included RCTs were generally acceptable; (iii) TwHF brought about a favorable increase in complete remission (CR) (RR 1.53, 95%CI 1.09 to 2.16, I2=12%) and total remission (TR) (RR 1.27, 95%CI 1.08 to 1.48, I2=0%) compared with non-TwHF treatment; and this result was further confirmed by intention-to-treat analysis; (iv) Exploiting subgroup meta-analysis, TwHF led to significantly greater improvements of IgAN with non-nephrotic proteinuria with regard to the increase of CR (RR 1.80, 95%CI 1.21 to 2.68, I2=0%) and TR (RR 1.32, 95%CI 1.11 to 1.57, I2=0%), and decrease of urinary proteinuria excretion (UPE) (MD -467.41 mg/24h, 95%CI -633.99 to -300.82, I2=0%). Meanwhile, the renal function was well preserved (MD -2.66 μmol/L, 95%CI -9.26 to 3.94, I2=0%). Conclusion Although the results of this meta-analysis should be interpreted with caution and warrant further investigation, TwHF was certainly a valuable and promising immunosuppressive remedy for IgAN, which was in accordance with the accruing evidence from numerous large clinical and experimental studies.

Meta-Analysis of Tripterygium Wilfordii Hook F in the Immunosuppressive Treatment of IgA Nephropathy

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