MME+ fibro-adipogenic progenitors are the dominant adipogenic population during fatty infiltration in human skeletal muscle

Autor: Gillian Fitzgerald, Guillermo Turiel, Tatiane Gorski, Inés Soro-Arnaiz, Jing Zhang, Nicola C. Casartelli, Evi Masschelein, Nicola A. Maffiuletti, Reto Sutter, Michael Leunig, Jean Farup, Katrien De Bock
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Fitzgerald, G, Turiel, G, Gorski, T, Soro-Arnaiz, I, Zhang, J, Casartelli, N C, Masschelein, E, Maffiuletti, N A, Sutter, R, Leunig, M, Farup, J & De Bock, K 2023, ' MME+ fibro-adipogenic progenitors are the dominant adipogenic population during fatty infiltration in human skeletal muscle ', Communications Biology, vol. 6, pp. 1-21 . https://doi.org/10.1038/s42003-023-04504-y
Communications Biology, 6 (1)
ISSN: 2399-3642
DOI: 10.3929/ethz-b-000597079
Popis: Fatty infiltration, the ectopic deposition of adipose tissue within skeletal muscle, is mediated via the adipogenic differentiation of fibro-adipogenic progenitors (FAPs). We used single-nuclei and single-cell RNA sequencing to characterize FAP heterogeneity in patients with fatty infiltration. We identified an MME+ FAP subpopulation which, based on ex vivo characterization as well as transplantation experiments, exhibits high adipogenic potential. MME+ FAPs are characterized by low activity of WNT, known to control adipogenic commitment, and are refractory to the inhibitory role of WNT activators. Using preclinical models for muscle damage versus fatty infiltration, we show that many MME+ FAPs undergo apoptosis during muscle regeneration and differentiate into adipocytes under pathological conditions, leading to a reduction in their abundance. Finally, we utilized the varying fat infiltration levels in human hip muscles and found less MME+ FAPs in fatty infiltrated human muscle. Altogether, we have identified the dominant adipogenic FAP subpopulation in skeletal muscle.
Communications Biology, 6 (1)
ISSN:2399-3642
Databáze: OpenAIRE
Externí odkaz: