Associations between erythropoietin polymorphisms and risk of diabetic microvascular complications
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Hua Li1,*, Huipu Xu2,*, Yuerong Li2, Dongdong Zhao2 and Baoxin Ma2
1Department of Oncology, The Affiliated Hospital of Binzhou Medical University, Binzhou, Shandong 256603, China
2Department of Cardiology, The Affiliated Hospital of Binzhou Medical University, Binzhou, Shandong 256603, China
*These authors contributed equally to this work
Baoxin Ma, email: firstname.lastname@example.org
Keywords: erythropoietin; polymorphism; diabetic microvascular complication; systematic review; meta-analysis
Received: May 27, 2017 Accepted: October 27, 2017 Published: November 27, 2017
We conducted a meta-analysis to evaluate the relationship between erythropoietin (EPO) polymorphisms and diabetic microvascular complications. We searched the PubMed, Embase, Cochrane library, Web of Science, Wanfang, and Chinese National Knowledge Infrastructure databases for appropriate studies. Odds ratios (ORs) with 95% confidence intervals (CIs) were calculated to evaluate the associations. Ultimately, eight studies consisting of 2,861 cases and 2,136 controls were identified and included in our meta-analysis. Results with our genotype model indicated an association between rs1617640 polymorphisms and diabetic microvascular complications (TT vs. GG: OR = 1.544, 95% CI = 1.089–2.189, P = 0.015). No clear associations between the rs1617640 and rs507392 polymorphisms and diabetic retinopathy were observed. By contrast, rs551238 polymorphisms were associated with increased diabetic retinopathy risk (allele model: OR = 0.774, 95% CI = 0.658–0.911, P = 0.002; genotype model: AC vs. CC: OR = 0.598, 95% CI = 0.402–0.890, P = 0.011; dominant model: OR = 0.561, 95% CI = 0.385–0.817, P = 0.003; recessive model: OR = 0.791, 95% CI = 0.643–0.973, P = 0.026). These results indicate that EPO polymorphisms are a risk factor for diabetic microvascular complications.
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