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Related Experiment Videos

[Interleukin-2 (IL-2) in active pulmonary tuberculosis].

T Ida1, S Taniai, K Makiguchi

  • 1Department of Internal Medicine, Branch Hospital, Tokyo Medical and Dental University, Ibaraki, Japan.

Kekkaku : [Tuberculosis]
|November 1, 1991
PubMed
Summary

Cellular immunity in tuberculosis involves elevated adenosine deaminase (ADA) and soluble interleukin-2 receptor (IL-2R) levels. Patient lymphocytes show suppressed IL-2 responsiveness, suggesting a negative feedback mechanism.

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Area of Science:

  • Immunology
  • Cellular Biology
  • Infectious Diseases

Context:

  • Pulmonary tuberculosis (TB) is a significant global health challenge.
  • Understanding the cellular immune response in active TB is crucial for diagnosis and treatment.
  • T-cell activation plays a key role in cellular immunity.

Purpose:

  • To investigate the cellular immunity mechanisms in patients with untreated active pulmonary tuberculosis.
  • To measure levels of interleukin-2 (IL-2), adenosine deaminase (ADA), and soluble IL-2 receptor (IL-2R) in TB patients.
  • To assess the IL-2 production and responsiveness of peripheral lymphocytes in TB patients.

Summary:

  • Patients with active pulmonary TB exhibited significantly elevated serum ADA and soluble IL-2R levels compared to normal ranges.

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  • No difference was observed in IL-2 production by peripheral lymphocytes upon PHA stimulation between TB patients and controls.
  • Peripheral lymphocytes from TB patients demonstrated significantly suppressed IL-2 responsiveness, indicating impaired T-cell function.
  • Serum IL-2 was undetectable in both TB patients and controls, suggesting localized or transient IL-2 activity.

    • Impact:

    • The findings suggest T-cell activation in active pulmonary TB, leading to increased serum ADA and soluble IL-2R.
    • Suppressed IL-2 responsiveness in lymphocytes may indicate a negative feedback mechanism involving soluble IL-2R.
    • This research contributes to understanding the complex immune dysregulation in pulmonary tuberculosis.