Pharmacological inhibition of macrophage triglyceride biosynthesis pathways does not improve Mycobacterium tuberculosis control in infected mice.

Tuberculosis (TB) necrotic granulomas contain triglyceride-rich macrophages (foam cells) with reduced antimicrobial functions. We assessed the ability of two compounds to reduce triglyceride content and Mycobacterium tuberculosis (Mtb) burden in infected human monocyte-derived macrophages and in the lungs of Mtb-infected C3HeB/FeJ mice: A-922500 (DGATi), an inhibitor of diacylglycerol acyltransferase 1; and LY2584702 (p70S6Ki), an inhibitor of p70 S6 kinase. DGATi and p70S6Ki significantly reduced the lipid content and bacillary burden in Mtb-infected macrophages.