Role of Toll-Like Receptors in Tuberculosis Infection.

Article Details


Biyikli OO, Baysak A, Ece G, Oz AT, Ozhan MH, Berdeli A

Role of Toll-Like Receptors in Tuberculosis Infection.

Jundishapur J Microbiol. 2016 Sep 14;9(10):e20224. eCollection 2016 Oct.

PubMed ID
27942355 [ View in PubMed

BACKGROUND: One-third of the world's population is infected with Mycobacterium tuberculosis. Investigation of Toll-like receptors (TLRs) has revealed new information regarding the immunopathogenesis of this disease. Toll-like receptors can recognize various ligands with a lipoprotein structure in the bacilli. Toll-like receptor 2 and TLR-4 have been identified in association with tuberculosis infection. OBJECTIVES: The aim of our study was to investigate the relationship between TLR polymorphism and infection progress. METHODS: Twenty-nine patients with a radiologically, microbiologically, and clinically proven active tuberculosis diagnosis were included in this 25-month study. Toll-like receptor 2 and TLR-4 polymorphisms and allele distributions were compared between these 29 patients and 100 healthy control subjects. Peripheral blood samples were taken from all patients. Genotyping of TLR-2, TLR-4, and macrophage migration inhibitory factor was performed. The extraction step was completed with a Qiagen mini blood purification system kit (Qiagen, Ontario, Canada) using a peripheral blood sample. The genotyping was performed using polymerase chain reaction-restriction fragment length polymorphism. RESULTS: In total, 19 of the 29 patients with tuberculosis infection had a TLR-2 polymorphism, and 20 of the 100 healthy subjects had a TLR-2 polymorphism (P < 0.001). The TLR-4 polymorphism and interferon-gamma allele distributions were not statistically correlated. CONCLUSIONS: Toll-like receptor 2 polymorphism is a risk factor for tuberculosis infection. The limiting factor in this study was the lack of investigation of the interferon-gamma and tumor necrosis factor-alpha levels, which are important in the development of infection. Detection of lower levels of these cytokines in bronchoalveolar lavage specimens, especially among patients with TLR-2 defects, will provide new data that may support the results of this study.

DrugBank Data that Cites this Article

Drug Targets
DrugTargetKindOrganismPharmacological ActionActions
Tuberculin purified protein derivativeToll-like receptor 2ProteinHumans