Pulmonary tuberculosis susceptibility and association with Toll-Like receptor 2 Arg753Gln polymorphism

  • Eman A El-Masry Microbiology and Immunology Unit, Department of Pathology, College of Medicine, Jouf University, Sakaka City Al-Jouf, Saudi Arabia
  • Ibrahim Taher Microbiology and Immunology Unit, Department of Pathology, College of Medicine, Jouf University, Sakaka City Al-Jouf, Saudi Arabia
  • Helal F Hetta Department of Medical Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut, Egypt
  • Samy S Eldahdouh Chest department, Menoufia university hospital, Menoufia, Egypt
Keywords: Polymorphism, Mycobacterium, TB, TLR2

Abstract

Introduction: Tuberculosis has been a concern of healthcare professionals due to the serious threats it poses on public health safety. However, regardless all the efforts, no appropriate goals for immunological diagnosis or tuberculosis treatment were established. Toll-like receptor 2 is one of the toll-like receptors, which plays a fundamental role in recognizing and hosting defense against Mycobacterium tuberculosis infection. Toll-like receptor 2’s genetic polymorphism (arginine-to-glutamine substitution at residue 753 (Arg753Gln)) was linked to negative effects on the function of Toll-like receptor 2 which, in turn, impacts the body’s resistance or susceptibility to tuberculosis. The current study aimed at investigating the single Arg753Gln nucleotide polymorphism of the Toll-like receptor 2 gene in patients with tuberculosis infection versus a sample of healthy subjects as controls.

Methodology: A comparative study was conducted to investigate Toll-like receptor 2 polymorphism of the single nucleotide gene Arg753Gln in 30 patients with pulmonary tuberculosis and compare their results with other 20 healthy controls matched by age and sex.

Results: TLR-2-Arg polymorphism allele A occurred in 36.7% of the patient group. Homozygous carriers of allele A/A polymorphism occurred in 13.4% compared to 5% among controls, while GA genotype was found in 23.3% among the study group and 10% among controls. The association between GA genotype and pulmonary tuberculosis was found statistically significant (p = 0.002) than other genotypes. Allele frequency for both G and A were (p =0.002) in patient groups and (p =0.000) among the control group.

Conclusions: TLR-2 Arg753Gln polymorphisms may have a crucial role in pulmonary tuberculosis susceptibility among Egyptian patients.

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Published
2022-01-31
How to Cite
1.
El-MasryEA, Taher I, Hetta HF, Eldahdouh SS (2022) Pulmonary tuberculosis susceptibility and association with Toll-Like receptor 2 Arg753Gln polymorphism. J Infect Dev Ctries 16:125-133. doi: 10.3855/jidc.14885
Section
Original Articles