T-cell exhaustion in tuberculosis: pitfalls and prospects.

Abstract:

:T-cells play an important role in immunity but when these cells are overexposed to specific antigens, their function may decline. This state is usually referred to as exhaustion and the T-cells show reduced proliferation and functions such as cytokine release. T-cell exhaustion has been observed in several cancers as well as in chronic infections such as tuberculosis (TB). In chronic Mycobacterium tuberculosis (Mtb) infection, T-cells may express the exhaustion phenotype and show a progressive loss of secretion of IL-2, IFN-γ and TNF-α. In some cancers and chronic infection models, blocking the exhaustion phenotype can be achieved with the so-called checkpoint inhibitors. This results in tumor control and more effective immunity. However, in the case of TB, the T-cell exhaustion results are quite ambiguous. Hence, there is a need to investigate and explain the contribution of checkpoint at a molecular level to the outcome of events in chronic TB. Such information could help to guide the success of new therapies against chronic TB. This review highlights the mechanism through which T-cells undergo exhaustion and the approaches that can avert such events. This will help to design immunotherapies that can reinvigorate T-cell potency to protect patients from TB.

journal_name

Crit Rev Microbiol

authors

Khan N,Vidyarthi A,Amir M,Mushtaq K,Agrewala JN

doi

10.1080/1040841X.2016.1185603

subject

Has Abstract

pub_date

2017-03-01 00:00:00

pages

133-141

issue

2

eissn

1040-841X

issn

1549-7828

journal_volume

43

pub_type

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