Associations between interleukin-1 polymorphisms and susceptibility to vasculitis: a meta-analysis

Area of Science:

• Immunogenetics
• Rheumatology
• Genetic Epidemiology

Background:

• Interleukin-1 (IL-1) plays a crucial role in inflammatory processes.
• Genetic variations in IL-1 genes may influence susceptibility to autoimmune diseases like vasculitis.

Purpose of the Study:

• To investigate the association between polymorphisms in IL-1A, IL-1B, and IL-1 receptor antagonist (IL1RN) genes and the risk of developing vasculitis.

Main Methods:

• A comprehensive meta-analysis was performed on 17 studies.
• Included 1384 vasculitis cases (Behçet's disease, IgA vasculitis, ANCA-associated vasculitis, Kawasaki disease, etc.) and 2710 controls.
• Analyzed IL-1A-889 C/T, IL-1B-511 C/T, IL-1B+3953 C/T, and IL1RN polymorphisms.

Main Results:

• The IL-1A-889 C/T polymorphism showed an association with Behçet's disease (BD) susceptibility.
• The IL1RN*2 allele was significantly associated with vasculitis (including AAV, BD, KD) in Asian populations.
• No significant associations were found for IL-1B polymorphisms or IL1RN*2 in Caucasian/Turkish populations.

Conclusions:

• The IL-1A-889 C/T polymorphism may contribute to BD susceptibility.
• The IL1RN*2 allele is a potential risk factor for certain vasculitides in Asian individuals.
• Further research is warranted to elucidate the role of IL-1 polymorphisms in diverse ethnic groups.