Metformin enhances anti-mycobacterial responses by educating CD8+ T-cell immunometabolic circuits.

ABSTRACT: Patients with type 2 diabetes (T2D) have a lower risk of Mycobacterium tuberculosis infection, progression from infection to tuberculosis (TB) disease, TB morality and TB recurrence, when being treated with metformin. However, a detailed mechanistic understanding of these protective effects is lacking. Here, we use mass cytometry to show that metformin treatment expands a population of memory-like antigen-inexperienced CD8⁺CXCR3⁺ T cells in naive mice, and in healthy individuals and patients with T2D. Metformin-educated CD8⁺ T cells have increased (i) mitochondrial mass, oxidative phosphorylation, and fatty acid oxidation; (ii) survival capacity; and (iii) anti-mycobacterial properties. CD8⁺ T cells from Cxcr3^-/- mice do not exhibit th

SUBMITTER: Bohme J 

PROVIDER: S-EPMC7567856 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature