AMPK α1‐ LDH pathway regulates muscle stem cell self‐renewal by controlling metabolic homeostasis - Archive ouverte HAL Access content directly
Journal Articles EMBO Journal Year : 2017

AMPK α1‐ LDH pathway regulates muscle stem cell self‐renewal by controlling metabolic homeostasis

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Gaëtan Juban
Lin Yang
Anne Brunet
  • Function : Author
Bénédicte Chazaud
Rémi Mounier
  • Function : Correspondent author
  • PersonId : 1097222

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Abstract

Control of stem cell fate to either enter terminal differentiation versus returning to quiescence (self-renewal) is crucial for tissue repair. Here, we showed that AMP-activated protein kinase (AMPK), the master metabolic regulator of the cell, controls muscle stem cell (MuSC) self-renewal. AMPKα1-/- MuSCs displayed a high self-renewal rate, which impairs muscle regeneration. AMPKα1-/- MuSCs showed a Warburg-like switch of their metabolism to higher glycolysis. We identified lactate dehydrogenase (LDH) as a new functional target of AMPKα1. LDH, which is a non-limiting enzyme of glycolysis in differentiated cells, was tightly regulated in stem cells. In functional experiments, LDH overexpression phenocopied AMPKα1-/- phenotype, that is shifted MuSC metabolism toward glycolysis triggering their return to quiescence, while inhibition of LDH activity rescued AMPKα1-/- MuSC self-renewal. Finally, providing specific nutrients (galactose/glucose) to MuSCs directly controlled their fate through the AMPKα1/LDH pathway, emphasizing the importance of metabolism in stem cell fate.
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Dates and versions

inserm-03666166 , version 1 (12-05-2022)

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Marine Theret, Linda Gsaier, Bethany Schaffer, Gaëtan Juban, Sabrina Ben Larbi, et al.. AMPK α1‐ LDH pathway regulates muscle stem cell self‐renewal by controlling metabolic homeostasis. EMBO Journal, 2017, 36 (13), pp.1946-1962. ⟨10.15252/embj.201695273⟩. ⟨inserm-03666166⟩
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