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Toll‐like receptor‐2 Arg753Gln and Arg677Trp polymorphisms and susceptibility to pulmonary and peritoneal tuberculosis

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Recent evidence suggests that toll‐like receptor‐2 (TLR2) is important for host defense against Mycobacterium tuberculosis (MTB). TLR2 polymorphisms have shown significant impact on susceptibility or resistance to tuberculosis (TB). This case–control study aims to determine the influence of TLR2 (Arg753Gln and Arg677Trp) polymorphisms on the susceptibility to develop pulmonary or peritoneal TB. Genotyping of TLR2 (Arg753Gln and Arg677Trp) polymorphisms was carried out on 52 patients with pulmonary TB, 44 patients with peritoneal TB, and 50 healthy controls using polymerase chain reaction‐restriction fragment length polymorphism (PCR‐RFLP). There was a significant association between the GA genotype (heterozygous mutant) of TLR2 Arg753Gln polymorphism and the risk of infection with pulmonary TB (p = 0.003, OR = 4.83) and TB peritonitis (p = 0.003, OR = 6.2). Differences in the genotype frequencies of TLR2 Arg677Trp polymorphisms between patients with pulmonary or peritoneal TB and healthy controls were not detected. GA753 TLR2 polymorphism may play a role in the susceptibility to pulmonary and peritoneal TB infection. Further studies on a large number of ethnically diverse patient cohorts may help to confirm the possible effect of these polymorphisms on the susceptibility to pulmonary and peritoneal TB.
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Keywords: Toll‐like receptor; polymorphisms; tuberculosis

Document Type: Research Article

Publication date: June 1, 2017

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