Angiotensin-Converting Enzyme Gene I/D Polymorphism Is Associated With Systemic Lupus Erythematosus Susceptibility:...

Area of Science:

• Genetics
• Immunology
• Cardiovascular Biology

Background:

• The Angiotensin-converting enzyme (ACE) gene plays a crucial role in endothelial function and vascular tone.
• Systemic Lupus Erythematosus (SLE) is an autoimmune disease where endothelial dysfunction is a common feature.
• The association between ACE insertion/deletion (I/D) polymorphism and SLE susceptibility has been inconsistently reported in previous studies.

Purpose of the Study:

• To conduct a comprehensive meta-analysis to precisely evaluate the association between ACE I/D polymorphism and SLE susceptibility.
• To clarify the role of ACE I/D polymorphism in the risk and progression of Systemic Lupus Erythematosus.

Main Methods:

• A systematic literature search was performed using Medline (PubMed), Google-Scholar, and EMBASE up to December 2017.
• A meta-analysis was conducted on 25 published studies, including 3,308 cases and 4,235 controls.
• Statistical analyses were performed for various genetic models (allelic, homozygous, dominant, recessive) and subgroup analyses by ethnicity.

Main Results:

• A statistically significant increased risk of SLE was found for the ACE I/D polymorphism across allelic, homozygous, dominant, and recessive genetic models.
• Subgroup analysis revealed a significant risk association in Asian populations for allelic and dominant models.
• No significant association was observed in Caucasian and African populations, and publication bias was absent.

Conclusions:

• The ACE I/D polymorphism is significantly associated with overall SLE risk.
• This genetic polymorphism may serve as a valuable prognostic marker for early SLE predisposition.
• Further research into ethnic-specific associations could refine understanding of SLE pathogenesis.