Angiotensin-converting enzyme insertion/deletion polymorphism and susceptibility to systemic sclerosis: a...

Area of Science:

• Genetics
• Rheumatology
• Molecular Biology

Background:

• Systemic sclerosis (SSc) is a complex autoimmune disease with poorly understood genetic underpinnings.
• The angiotensin-converting enzyme (ACE) gene I/D polymorphism has been investigated for its potential role in various autoimmune conditions.

Purpose of the Study:

• To investigate the association between the ACE I/D polymorphism and susceptibility to systemic sclerosis (SSc).
• To analyze this association in overall and specifically European populations.

Main Methods:

• A meta-analysis was performed on 7 studies, including 837 cases and 754 controls.
• Genetic models analyzed included allelic contrast (D vs I), recessive (DD vs ID + II), dominant (DD + ID vs II), and additive (DD vs ID vs II).

Main Results:

• The meta-analysis revealed no statistically significant association between the ACE D allele and SSc susceptibility in the overall study population (OR = 0.956, P = 0.737).
• Stratification by ethnicity confirmed no association in Europeans (OR = 1.117, P = 0.551).
• All genetic models consistently showed no association in both overall and European groups.

Conclusions:

• The ACE I/D polymorphism is not associated with susceptibility to systemic sclerosis (SSc).
• This finding holds true for both the general study population and European cohorts.