Antigens for CD4 and CD8 T cells in tuberculosis

Area of Science:

• Immunology
• Infectious Diseases
• Vaccinology

Background:

• Tuberculosis (TB), caused by Mycobacterium tuberculosis (MTB), is a major global health concern requiring improved vaccines and diagnostics.
• CD4(+) and CD8(+) T cells are vital for host defense against TB.
• Identifying T cell-recognized antigens is key to understanding TB immunobiology and developing interventions.

Purpose of the Study:

• To review antigens and epitopes recognized by human CD4(+) and CD8(+) T cells in Mycobacterium tuberculosis (MTB)-infected individuals.
• To highlight the importance of these T cell targets for vaccine and diagnostic development.

Main Methods:

• Review of studies defining antigens and epitopes recognized by HLA class I- and II-restricted CD4(+) and CD8(+) T cells.
• Inclusion of data from approaches targeting specific TB proteins and genome-wide discovery methods.

Main Results:

• Extensive breadth and diversity of antigens and epitopes recognized by T cells in MTB-infected humans were observed.
• Immunodominant antigens and epitopes have been identified through various discovery approaches.

Conclusions:

• The diverse repertoire of T cell antigens in TB provides a foundation for rational vaccine design and immunodiagnostic strategies.
• Further characterization of these targets can significantly advance TB control efforts.