Efficacy and safety of angiotensin converting enzyme inhibitors and angiotensin II receptor blockers in diabetic nephropathy: a systematic review and meta-analysis.

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Diabetic nephropathy (DN) is one of the most typical microangiopathies caused by diabetes. It often leads enormous physiological and psychological burdens for patients and seriously affects their quality of life. Therefore, effective combination therapy is necessary for these patients. In this study, we performed a meta-analysis to systematically evaluate and discuss the efficacy and safety of angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin II receptor blockers (ARBs) in the treatment of DN. The PubMed, Embase, Web of Science, and Medline databases were selected as the sources of the literature search, and the search was limited to studies published in English. Studies related to ACEIs and ARBs in the treatment of DN published from January 2001 to January 2021 were included in this analysis. Meta-analysis was performed to calculate the reinforcement mean difference. In total, eight articles involving 1,893 cases with DN were included in this study. The results of this systematic review and meta-analysis showed that for patients with diabetic nephropathy，there were significant differences in 24-hour proteinuria [mean difference (MD) =-78.46, 95% confidence interval (95% CI): -80.25 to -76.66, P<0.00001], systolic blood pressure (MD =-9.11, 95% CI: -13.44 to -4.78, P<0.0001), and diastolic blood pressure (MD =-3.39, 95% CI: -5.68 to -1.11, P=0.004) between the combined ACEI and ARB group and the single ACEI or ARB group (P<0.05). In terms of safety, in addition to the significant difference in serum potassium (MD =0.1, 95% CI: 0.05 to 0.15, P=0.0001) between the combined ACEI and ARB group and the single drug group (P<0.1), there were no notable differences in serum creatinine (MD =0.66, 95% CI: -8.0 to 2.12, P=0.37), creatinine clearance (MD =-0.25, 95% CI: -0.62, 0.11, P=0.17), or the incidence of adverse reactions [odds ratio (OR) =1.19, 95% CI: 0.81 to 1.75, P=0.37]. A total of eight studies were included in this meta-analysis. The results showed that for patients with diabetic nephropathy, the combination of ACEI and ARB was more effective than ACEI or ARB alone, and also had higher safety.