PPAR-γ and Akt regulate GLUT1 and GLUT3 surface localization during Mycobacterium tuberculosis infection
The success of Mycobacterium tuberculosis (Mtb) as a pathogen stems from its ability to manipulate the host macrophage towards increased lipid biogenesis and lipolysis inhibition. Inhibition of lipolysis requires augmented uptake of glucose into the host cell causing an upregulation of the glucose transporters GLUT1 and GLUT3 on the cell surface. Mechanism behind this upregulation of the GLUT proteins during Mtb infection is hitherto unknown and demands intensive investigation in order to understand the pathways linked with governing them. Our endeavor to investigate some of the key proteins that have been found to be affected during Mtb infection led us to investigate host molecular pathways such as Akt and PPAR-γ that remain closely associated with the survival of the bacilli by modulating the localization of glucose transporters GLUT1 and GLUT3.
KeywordsMycobacterium tuberculosis GLUT1 GLUT3 Akt PPAR-γ
Glucose transporter 1 also known as solute carrier family 2, facilitated glucose transporter member 1 (SLC2A1)
Glucose transporter 3, also known as solute carrier family 2, facilitated glucose transporter member 3 (SLC2A3)
Peroxisome proliferator-activated receptor-γ
SD, RCR, and this work were financially supported by project grant from Department of Biotechnology, Government of India to KVS Rao’s lab (BT/PR3260/BRB/10/967/2011). Thanks to Dr. K. V. S. Rao, ICGEB, New Delhi, India, for critically reading the manuscript. Authors also thank Jyoti Singh for her help with confocal experiments.
Compliance with ethical standards
Conflict of interest
The authors declare no conflict of interest, and funding agency has no role in the designing of the experiments.
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