IKAROS expression drives the aberrant metabolic phenotype of macrophages in chronic HIV infection

Clin Immunol. 2024 Mar;260:109915. doi: 10.1016/j.clim.2024.109915. Epub 2024 Jan 28.ABSTRACTThe increased risk for acquiring secondary illnesses in people living with HIV (PLWH) has been associated with immune dysfunction. We have previously found that circulating monocytes from PLWH display a trained phenotype. Here, we evaluated the metabolic profile of these cells and found increased mitochondrial respiration and glycolysis of monocyte-derived macrophages (MDMs) from PLWH. We additionally found that cART shifted the energy metabolism of MDMs from controls toward increased utilization of mitochondrial respiration. Importantly, both downregulation of IKAROS expression and inhibition of the mTOR pathway reversed the metabolic profile of MDMs from PLWH and cART-treated control-MDMs. Altogether, this study reveals a very specific metabolic adaptation of MDMs from PLWH, which involves an IKAROS/mTOR-dependent increase of mitochondrial respiration and glycolysis. We propose that this metabolic adaptation decreases the ability of these cells to respond to environmental cues by "locking" PLWH monocytes in a pro-inflammatory and activated phenotype.PMID:38286172 | DOI:10.1016/j.clim.2024.109915
Source: Clinical Immunology - Category: Allergy & Immunology Authors: Source Type: research