Cited by 279Muscle Physiology and DisordersAdipose Tissue and MetabolismMetabolism, Diabetes, and Cancer

pH-gated succinate secretion regulates muscle remodeling in response to exercise

Open access
Reddy, Anita, Bozi, Luiz H.M., Yaghi, Omar K., Mills, Evanna L., Xiao, Haopeng, Nicholson, Hilary E., Paschini, Margherita, Paulo, Joao A. +12 more·2020·Cell

Abstract

In response to skeletal muscle contraction during exercise, paracrine factors coordinate tissue remodeling, which underlies this healthy adaptation. Here we describe a pH-sensing metabolite signal that initiates muscle remodeling upon exercise. In mice and humans, exercising skeletal muscle releases the mitochondrial metabolite succinate into the local interstitium and circulation. Selective secretion of succinate is facilitated by its transient protonation, which occurs upon muscle cell acidification. In the protonated monocarboxylic form, succinate is rendered a transport substrate for monocarboxylate transporter 1, which facilitates pH-gated release. Upon secretion, succinate signals via its cognate receptor SUCNR1 in non-myofibrillar cells in muscle tissue to control muscle-remodeling transcriptional programs. This succinate-SUCNR1 signaling is required for paracrine regulation of muscle innervation, muscle matrix remodeling, and muscle strength in response to exercise training. In sum, we define a bioenergetic sensor in muscle that utilizes intracellular pH and succinate to coordinate tissue adaptation to exercise.

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Crossref · 10.1016/j.cell.2020.08.039

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  • Succinate release from muscle cells occurs in a pH-dependent manner via monocarboxylate transporter 1 and is facilitated by transient protonation of succinate upon muscle cell acidification.

    “This release occurs in a pH-dependent manner via monocarboxylate transporter 1 and is facilitated by transient protonation of succinate upon muscle cell acidification (191).”
  • Circulating succinate binds its receptor SUCNR1 in nonmyofibrillar cells in muscle tissue to initiate transcriptional programs that support tissue remodeling in response to exercise.

    “Circulating succinate binds its receptor SUCNR1 in nonmyofibrillar cells in muscle tissue to initiate transcriptional programs that support tissue remodeling in response to exercise (191).”
  • Both mouse and human muscle cells selectively release succinate during physical activity.

    “Notably, both mouse and human muscle cells selectively release succinate during physical activity (191).”

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Authors
Reddy, A., Bozi, L. H. M., Yaghi, O. K., Mills, E. L., Xiao, H., Nicholson, H. E., Paschini, M., Paulo, J. A., Garrity, R., Laznik-Bogoslavski, D., Ferreira, J. C. B., Carl, C. S., Sjøberg, K. A., Wojtaszewski, J. F. P., Jeppesen, J. F., Kiens, B., Gygi, S. P., Richter, E. A., Mathis, D., & Chouchani, E. T.
Affiliations
  • Harvard University (US)
  • Boston Children's Hospital (US)
  • Dana-Farber Cancer Institute (US)
  • Universidade de São Paulo (BR)
  • University of Copenhagen (DK)
  • Novo Nordisk (Denmark) (DK)
Corresponding author
Chouchani, Edward T.
Venue
Cell
Publisher
Elsevier BV
Published
2020-10
Volume
183
Issue
1
Pages
62-75.e17
ISSN
0092-8674 (ISSN-L)
OpenAlex
W3086698680
Cited by
279
References
82
Citations by year
2026: 38 · 2025: 58 · 2024: 63 · 2023: 44 · 2022: 41 · 2021: 33 · 2020: 2
FWCI
9.72
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institutes of Health
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
skeletal muscle remodeling, intracellular pH, protonation, MCT1, SUCNR1, paracrine signaling, muscle innervation, extracellular matrix remodeling, muscle strength, exercise training, mitochondrial metabolites
MeSH terms
Monocarboxylate Transport Protein 1, Animals, Humans, Hydrogen-Ion Concentration, Inflammation, Mitochondria, Muscle Contraction, Succinates, Signal Transduction, Muscle, Skeletal, Succinic Acid, Monocarboxylic Acid Transporters, Symporters, Receptors, G-Protein-Coupled, Mice

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