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Association between interleukin-27 polymorphisms and pulmonary tuberculosis.

J Y Oh1, J K Sim1, W J Jung2

  • 1Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Korea University Guro Hospital, Seoul, Republic of Korea.

The International Journal of Tuberculosis and Lung Disease : the Official Journal of the International Union Against Tuberculosis and Lung Disease
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Summary
This summary is machine-generated.

The -964 A/A genotype of interleukin 27 (IL-27) may protect against the spread of pulmonary tuberculosis (PTB). Higher IL-27 serum levels were observed in patients with this genotype and single-lobe involvement.

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Area of Science:

  • Immunogenetics
  • Tuberculosis Research
  • Molecular Epidemiology

Background:

  • Pulmonary tuberculosis (PTB) remains a significant global health challenge.
  • Interleukin 27 (IL-27) is a cytokine involved in immune regulation and host defense.
  • Genetic variations in IL-27 may influence susceptibility and disease progression in PTB.

Purpose of the Study:

  • To examine the association between IL-27 gene polymorphisms (-964A/G, 2095T/G, 4603G/A, 4730T/C) and PTB.
  • To investigate the impact of these polymorphisms on radiographic characteristics and disease severity.
  • To assess the relationship between IL-27 serum levels and PTB phenotypes.

Main Methods:

  • Case-control study comparing 224 PTB patients and 233 healthy controls.
  • Analysis of allele and genotype frequencies for four IL-27 polymorphisms.
  • Measurement of serum IL-27 concentrations using ELISA.
  • Stratification of patients based on radiographic features (single- vs. multi-lobe involvement, cavitation).

Main Results:

  • No significant differences in allele or genotype distributions between PTB patients and controls.
  • The -964A/A genotype was more frequent in patients with single-lobe PTB compared to multi-lobe PTB (P=0.01).
  • Higher serum IL-27 levels were found in patients with single-lobe involvement (P=0.03) and with the -964A/A genotype (P=0.02).

Conclusions:

  • The IL-27 -964A/A genotype may play a protective role against the intrapulmonary spread of PTB.
  • This genotype is associated with higher serum IL-27 levels and a less disseminated form of the disease.
  • IL-27 gene polymorphisms might influence PTB radiographic characteristics and disease progression.