TLR4 polymorphism in Iranian patients with brucellosis

Area of Science:

• Immunogenetics
• Infectious Diseases
• Public Health

Background:

• Brucellosis is a significant zoonotic disease impacting public health and economies, especially in developing nations.
• Polymorphisms in Toll-like receptor-4 (TLR4) are known to influence immune responses to pathogens.
• No prior research has explored the link between TLR4 gene variations and brucellosis susceptibility.

Purpose of the Study:

• To investigate the association between genetic polymorphisms in the Toll-like receptor-4 (TLR4) gene and susceptibility to brucellosis.
• To determine if specific TLR4 alleles influence the risk of developing brucellosis.

Main Methods:

• A case-control study involving 198 brucellosis patients and 111 healthy controls.
• Genotyping for the TLR4 gene (Asp299Gly) polymorphism using the amplification refractory mutation system (ARMS)-PCR method.
• Statistical analysis including logistic regression to assess risk factors.

Main Results:

• The 896G allele of the TLR4 gene was significantly more prevalent in brucellosis patients (33.6%) than in controls (20.7%).
• The G allele frequency was notably higher in male brucellosis patients (36%) compared to male controls (21.7%).
• Male patients heterozygous for the TLR4 G allele exhibited a 2.89-fold increased risk of brucellosis (95% CI: 1.79-4.69).

Conclusions:

• This research provides the first evidence of an association between TLR4 gene polymorphism and brucellosis susceptibility.
• The findings suggest that specific genetic variations in TLR4 may play a role in an individual's risk of contracting brucellosis.