Details

Autor(en) / Beteiligte

• Bertschi, Nicole L
• Steck, Oliver
• Luther, Fabian
• Bazzini, Cecilia
• von Meyenn, Leonhard
• Schärli, Stefanie
• Vallone, Angela
• Felser, Andrea
• Keller, Irene
• Friedli, Olivier
• Freigang, Stefan
• Begré, Nadja
• Radonjic-Hoesli, Susanne
• Lamos, Cristina
• Gabutti, Max Philip
• Benzaquen, Michael
• Laimer, Markus
• Simon, Dagmar
• Nuoffer, Jean-Marc
• Schlapbach, Christoph

Titel

PPAR-γ regulates the effector function of human T helper 9 cells by promoting glycolysis

Ist Teil von

• Nature communications, 2023-04, Vol.14 (1), p.2471-2471, Article 2471

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2023

Quelle

MEDLINE

Beschreibungen/Notizen

• T helper 9 (T 9) cells promote allergic tissue inflammation and express the type 2 cytokines, IL-9 and IL-13, as well as the transcription factor, PPAR-γ. However, the functional role of PPAR-γ in human T 9 cells remains unknown. Here, we demonstrate that PPAR-γ drives activation-induced glycolysis, which, in turn, promotes the expression of IL-9, but not IL-13, in an mTORC1-dependent manner. In vitro and ex vivo experiments show that the PPAR-γ-mTORC1-IL-9 pathway is active in T 9 cells in human skin inflammation. Additionally, we find dynamic regulation of tissue glucose levels in acute allergic skin inflammation, suggesting that in situ glucose availability is linked to distinct immunological functions in vivo. Furthermore, paracrine IL-9 induces expression of the lactate transporter, MCT1, in T cells and promotes their aerobic glycolysis and proliferative capacity. Altogether, our findings uncover a hitherto unknown relationship between PPAR-γ-dependent glucose metabolism and pathogenic effector functions in human T 9 cells.