Pyruvate dehydrogenase fuels a critical citrate pool that is essential for Th17 cell effector functions.
Cell Rep
; 42(3): 112153, 2023 03 28.
Article
in En
| MEDLINE
| ID: mdl-36848289
ABSTRACT
Pyruvate dehydrogenase (PDH) is the central enzyme connecting glycolysis and the tricarboxylic acid (TCA) cycle. The importance of PDH function in T helper 17 (Th17) cells still remains to be studied. Here, we show that PDH is essential for the generation of a glucose-derived citrate pool needed for Th17 cell proliferation, survival, and effector function. In vivo, mice harboring a T cell-specific deletion of PDH are less susceptible to developing experimental autoimmune encephalomyelitis. Mechanistically, the absence of PDH in Th17 cells increases glutaminolysis, glycolysis, and lipid uptake in a mammalian target of rapamycin (mTOR)-dependent manner. However, cellular citrate remains critically low in mutant Th17 cells, which interferes with oxidative phosphorylation (OXPHOS), lipid synthesis, and histone acetylation, crucial for transcription of Th17 signature genes. Increasing cellular citrate in PDH-deficient Th17 cells restores their metabolism and function, identifying a metabolic feedback loop within the central carbon metabolism that may offer possibilities for therapeutically targeting Th17 cell-driven autoimmunity.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Citric Acid
/
Th17 Cells
Limits:
Animals
Language:
En
Journal:
Cell Rep
Year:
2023
Document type:
Article
Affiliation country:
Luxembourg