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Updated: Jan 20, 2026

Author Spotlight: Optimizing CFU Determination for Efficient Assessment of TB Vaccine Efficacy and Antigen Presentation Analysis
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Targeting innate immunity for tuberculosis vaccination.

Shabaana A Khader1, Maziar Divangahi2, Willem Hanekom3

  • 1Department of Molecular Microbiology, Washington University School of Medicine in St. Louis, St. Louis, Missouri, USA.

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|September 4, 2019
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Summary

Tuberculosis (TB) vaccine development is exploring trained immunity, a form of innate immune memory, alongside adaptive memory. This approach may lead to more effective future TB vaccines.

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Area of Science:

  • Immunology
  • Vaccinology
  • Infectious Diseases

Background:

  • Adaptive immune memory in B and T cells is crucial for long-term protection against Mycobacterium tuberculosis.
  • Innate immune cells, like myeloid and NK cells, can also develop functional adaptation, termed trained immunity.
  • Trained immunity contributes to the beneficial heterologous effects of the bacille Calmette-Guérin (BCG) vaccine and its anti-TB activity.

Purpose of the Study:

  • To explore the role of trained immunity in tuberculosis (TB) vaccine development.
  • To investigate the potential of combining innate and adaptive immune memory for future TB vaccines.

Main Methods:

  • Review of experimental and epidemiological data on trained immunity.
  • Analysis of molecular mechanisms underlying trained immunity in myeloid cells.

Main Results:

  • Trained immunity in innate immune cells contributes to BCG vaccine's protective effects against TB.
  • Molecular mechanisms involve immunological signals, metabolic rewiring, and epigenetic reprogramming.

Conclusions:

  • Trained immunity is a promising avenue for developing next-generation TB vaccines.
  • Future TB vaccines could leverage both innate and adaptive immune memory for enhanced efficacy.