Association between Rho-kinase (ROCK2) gene polymorphisms and Behçet's disease

Area of Science:

• Genetics
• Immunology
• Rheumatology

Background:

• Behçet's disease (BD) is a complex multi-systemic vasculitis with an unknown etiology.
• Genetic factors are implicated in BD pathogenesis, but specific gene associations require further investigation.
• Rho-kinase 2 (ROCK2) is a key regulator of cellular processes relevant to inflammation and vascular function.

Purpose of the Study:

• To investigate the association between Rho-kinase (ROCK2) gene polymorphisms and Behçet's disease (BD) susceptibility in a Turkish population.
• To analyze ROCK2 gene expression levels in BD patients compared to healthy controls.
• To identify specific ROCK2 genetic variations that may contribute to BD risk.

Main Methods:

• Genotyping of 194 BD patients and 276 healthy Turkish controls using a BioMark 96.96 dynamic array system.
• Analysis of specific ROCK2 gene polymorphisms, including rs35768389 (Asp601Val) and rs1515219.
• Quantification of ROCK2 mRNA expression in peripheral blood samples via real-time polymerase chain reaction.

Main Results:

• Significant associations were found between the rs35768389 (Asp601Val) polymorphism and BD, with distinct genotype and allele frequencies in patients versus controls (P < 0.0001).
• The rs1515219 polymorphism also showed significant differences in genotype and allele frequencies between BD patients and controls (P = 0.0001).
• Increased peripheral blood mRNA ROCK2 expression was observed in BD patients compared to controls.

Conclusions:

• This study provides the first evidence linking ROCK2 gene variations to the risk of developing Behçet's disease in the Turkish population.
• Specific ROCK2 polymorphisms, rs35768389 and rs1515219, may play a role in modulating individual susceptibility to BD.
• Elevated ROCK2 expression suggests its involvement in the inflammatory processes underlying Behçet's disease.