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Enzyme-linked Immunospot Assay (ELISPOT): Quantification of Th-1 Cellular Immune Responses Against Microbial Antigens
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Enzyme-linked Immunospot Assay (ELISPOT): Quantification of Th-1 Cellular Immune Responses Against Microbial Antigens

Published on: November 23, 2010

Specific in vitro proliferative immune responses and lymphokine production in Ethiopian children with and without

M Kori1, V Barak, E Leibovitz

  • 1Kaplan Hospital, Kaplan Medical Center, Rehovot, Israel.

Infection
|March 4, 2000
PubMed

Insights

Ethiopian children with tuberculosis (TB) show a robust cellular immune response, indicated by positive Mantoux tests and specific cytokine profiles. This suggests an effective Th1-type immune response to mycobacteria in this population.

Area of Science:

  • Immunology
  • Infectious Diseases
  • Public Health

Background:

  • Cellular immune responses are crucial in combating tuberculosis (TB).
  • Understanding these responses in Ethiopian children is vital due to the region's TB burden.
  • Previous studies have not fully characterized the in vitro immune profiles in Ethiopian pediatric TB cases.

Purpose of the Study:

  • To investigate in vitro cellular immune responses in Ethiopian children and young adults with and without TB.
  • To compare these responses with healthy Ethiopian and non-Ethiopian controls.
  • To analyze cytokine profiles (IL-2, IFN-gamma, IL-4, IL-6) in response to purified protein derivative (PPD) stimulation.

Main Methods:

  • Peripheral blood mononuclear cells (PBMC) from Ethiopian children with TB, healthy Ethiopian contacts, healthy Ethiopians, and non-Ethiopian controls were analyzed.
  • In vitro proliferative responses to PPD were measured.
  • Cytokine levels (IL-2, IFN-gamma, IL-4, IL-6) were quantified using ELISA assays on PBMC supernatants after PPD stimulation.

Main Results:

  • Ethiopian children with TB and TB contacts had positive Mantoux skin tests.
  • PBMC proliferative response to PPD was significantly higher in Ethiopian children with TB compared to those without TB.
  • PPD stimulation significantly increased Interleukin-2 (IL-2) levels in Ethiopian children with TB compared to other groups; Interleukin-4 (IL-4) and Interleukin-6 (IL-6) showed no significant increase.

Conclusions:

  • Ethiopian children with TB demonstrate a strong cellular immune response, characterized by positive Mantoux tests and limited IL-4 and IL-6 production.
  • The observed immune profile suggests an effective Th1-type cellular immune response to mycobacteria in young Ethiopians with TB.
  • These findings contribute to understanding TB pathogenesis and immune evasion strategies in endemic settings.
Abstract

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