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Abstract

Mycobacterium tuberculosis (M.tb), the cause of deadly disease tuberculosis, is an opportunistic pathogen that primarily infects host alveolar macrophages. M.tb has developed several mechanisms to persist in infected host cells and to disseminate the disease. Its pathogenesis mainly depends on its competence to modulate the host machinery for its own benefit. One of the cellular responses triggered by M.tb is endoplasmic reticulum stress in infected macrophages, which eventually disturbs the physiological functioning of the ER. Uncontrolled ER stress activates IRE1, PERK, and ATF6 pathway to induce apoptosis of infected cells. Although apoptosis is known to control and clear the infection in primary stages of infection, in case of M.tb-infected ER stressed macrophages, apoptosis is able to disseminate the pathogen during its advanced stages. M.tb-infected lung granulomas are the preferential site of accumulation of apoptotic macrophages, thereby increasing the risk of disease dissemination. The present chapter will describe the mechanism for ER stress response generated by known M.tb virulence factors such as ESAT-6, HBHA, 38-kDa antigen, and PE_PGRS5. Future insights to describe M.tb infection in respect of eliciting ER stress response-mediated apoptosis and host interacting partners has the potential in identifying novel targets for vaccination and drugs to combat the disease.

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Abbreviations

ATF4:

Activating transcription factor 4

ATF6:

Activating transcription factor 6

bZiP:

Basic leucine zipper

CHOP:

C/EBP homologous protein

CREB:

cAMP response element binding

ER:

Endoplasmic reticulum

ERAD:

ER-associated degradation

ERSE:

ERS response elements

GRP78:

78-kDA glucose regulated protein

HBHA :

Heparin-binding hemagglutinin antigen

Hsp70:

Heat shock protein family

IP3R:

Inositol 1,4,5-triphate receptor

IRE1:

Inositol requiring enzyme 1a

JNK:

Jun-N-terminal kinase

M.tb :

Mycobacterium tuberculosis

MAPK:

Mitogen-activated protein kinases

MCPIP:

MCP-1- induced protein

MPTP:

Mitochondrial permeability transition pore

NO:

Nitric oxide

PERK:

Protein kinase-like ER kinase

ROS:

Reactive oxygen species

SERCA:

Sarco-endoplasmic reticulum calcium ATPase

TB:

Tuberculosis

TLR:

Toll-like receptor

TRAF2:

TNF-receptor associated factor 2

UPR :

Unfolded protein response

UPRE:

UPR element

XBP1:

X-box binding protein 1

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Correspondence to Seyed E. Hasnain .

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© 2019 Springer Nature Singapore Pte Ltd.

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Sharma, T., Grover, S., Ehtesham, N.Z., Hasnain, S.E. (2019). Endoplasmic Reticulum Stress: Importance in Pathogenesis of Mycobacterium tuberculosis. In: Hasnain, S., Ehtesham, N., Grover, S. (eds) Mycobacterium Tuberculosis: Molecular Infection Biology, Pathogenesis, Diagnostics and New Interventions. Springer, Singapore. https://doi.org/10.1007/978-981-32-9413-4_14

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