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Finding TB vaccine antigens: follow the TCRs

Andrew Lichtman1

  • 1Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.

Science Immunology
|February 3, 2023
PubMed

Insights

T-cell receptor (TCR) sequencing identified groups recognizing Mycobacterium tuberculosis antigens. These groups are linked to controlling or progressing tuberculosis infection, offering insights into immune responses.

Area of Science:

  • Immunology
  • Microbiology
  • Infectious Diseases

Background:

  • Tuberculosis (TB) remains a global health challenge, necessitating a deeper understanding of host immune responses.
  • T-cell receptors (TCRs) play a crucial role in recognizing pathogen-specific antigens and mediating adaptive immunity.

Purpose of the Study:

  • To identify T-cell receptor (TCR) similarity groups associated with Mycobacterium tuberculosis (M.tb) infection.
  • To determine the specific M.tb antigens recognized by these TCR groups.
  • To correlate TCR recognition patterns with tuberculosis infection control or progression.

Main Methods:

  • Utilized TCR sequencing to analyze the repertoire of T-cell receptors in individuals with M.tb infection.
  • Employed computational analysis to predict complementarity-determining region 3 (CDR3) structures.
  • Correlated identified TCR similarity groups with known M.tb antigens and clinical outcomes.

Main Results:

  • Identified distinct TCR similarity groups within the study population.
  • Characterized the M.tb antigens recognized by these specific TCR groups.
  • Found associations between certain TCR recognition profiles and either successful infection control or disease progression.

Conclusions:

  • TCR sequencing and CDR3 structure analysis can identify antigen-specific T-cell responses in M.tb infection.
  • Specific TCR recognition patterns are linked to distinct clinical outcomes in tuberculosis.
  • These findings provide a basis for developing targeted immunotherapies or diagnostics for TB.

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