Albuminuria is a risk factor for chronic kidney disease and cardiovascular events in diabetic people. The pathogenic processes in these circumstances have been documented to be significantly influenced by enhanced renin-angiotensin system activity. The current meta-analysis was carried out to assess the efficacy of direct renin inhibitors in preventing the progression of diabetic kidney disease. This metaanalysis was conducted as per the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). We searched the relevant medical literature through PubMed, Cochrane library and EMBASE. The primary efficacy outcome was a percentage change in urine albumin-creatinine ratio (UACR) (in mg/g) level. Other primary efficacy outcomes included remission from microalbuminuria to normal albuminuria and progression from microalbuminuria to macroalbuminuria. Four randomized control studies were identified and included in the current meta-analysis involving 9,609 participants. The use of direct renin inhibitors was superior in reducing mean UACR compared to angiotensin receptor blockers and angiotensin-converting enzyme inhibitors. The pooled mean difference in UACR between direct renin inhibitors and the control group was 9.42% (95% CI: -15.70 to -3.15: p-value=0.003). The odds of progression from microalbuminuria to normal albuminuria are 1.26 times higher in patients receiving direct renin inhibitors compared to patients in the control group (OR: 1.26, 95% CI: 1.08-1.46, p-value=0.002). The odds of remission from microalbuminuria to macroalbuminuria were 20% lower in patients receiving direct renin inhibitors compared to patients in the control group (OR: 0.80, 95% CI: 0.69-0.93, p-value=0.003). The use of aliskiren is associated with a significant reduction in UACR, increased remission from microalbuminuria to normal albuminuria and decreased progression from microalbuminuria to macroalbuminuria.
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