Cytokine Polymorphisms and Predisposition to Diabetic Nephropathy: A Meta-Analysis

Area of Science:

• Genetics and Molecular Biology
• Immunology
• Endocrinology

Background:

• Diabetic nephropathy (DN) predisposition is potentially influenced by cytokine gene polymorphisms, but existing research presents conflicting findings.
• This meta-analysis aims to clarify the association between specific cytokine gene polymorphisms and DN risk.

Approach:

• A comprehensive meta-analysis was conducted, pooling data from 30 relevant studies.
• Searches were performed across major scientific databases including PubMed, Embase, Web of Science, and CNKI.

Key Points:

• Significant differences in the distribution of TNF-α (-238 G/A, -308 G/A, -1031 C/T), IL-1A (-889 C/T), IL-1B (-511 C/T), and IL-18 (-137 G/C) polymorphisms were observed between DN patients and controls.
• Specific polymorphisms (TNF-α -308 G/A, IL-1B -511 C/T, IL-18 -137 G/C) showed significant associations in Asian populations.
• The IL-1B -511 C/T polymorphism was also significantly associated in Caucasian populations.

Conclusions:

• The study concludes that TNF-α, IL-1A, IL-1B, and IL-18 gene polymorphisms may play a role in DN susceptibility.
• These genetic factors appear to influence DN risk in the general population, with specific associations noted in Asian and Caucasian subgroups.