AUTHOR=Long Jing , Basu Roy Robindra , Zhang Yanjia J. , Antrobus Robin , Du Yuxian , Smith Duncan L. , Weekes Michael P. , Javid Babak 

TITLE=Plasma Membrane Profiling Reveals Upregulation of ABCA1 by Infected Macrophages Leading to Restriction of Mycobacterial Growth

JOURNAL=Frontiers in Microbiology

VOLUME=Volume 7 - 2016

YEAR=2016

URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2016.01086

DOI=10.3389/fmicb.2016.01086

ISSN=1664-302X

ABSTRACT=The plasma membrane represents a critical interface between the internal and extracellular environments, and harbors multiple proteins key receptors and transporters that play important roles in restriction of intracellular infection. We applied plasma membrane profiling (PMP), a technique that combines quantitative mass spectrometry with selective cell surface aminooxy-biotinylation, to Bacille Calmette-Guérin (BCG)-infected THP-1 macrophages. We quantified 559 PM proteins in BCG-infected THP-1 cells.  One significantly upregulated cell-surface protein was the cholesterol transporter ABCA1.  We showed that ABCA1 was upregulated on the macrophage cell-surface following infection with pathogenic mycobacteria and knockdown of ABCA1 resulted in increased mycobacterial survival within macrophages, suggesting that it may be a novel mycobacterial host-restriction factor.