Cited by 517Muscle Physiology and DisordersTGF-β signaling in diseasesMuscle metabolism and nutrition

Smad2 and 3 transcription factors control muscle mass in adulthood

Sartori, Roberta, Milan, Giulia, Patron, Maria, Mammucari, Cristina, Blaauw, Bert, Abraham, Reimar, Sandri, Marco·2009·American Journal of Physiology-Cell Physiology

Abstract

Loss of muscle mass occurs in a variety of diseases, including cancer, chronic heart failure, aquired immunodeficiency syndrome, diabetes, and renal failure, often aggravating pathological progression. Preventing muscle wasting by promoting muscle growth has been proposed as a possible therapeutic approach. Myostatin is an important negative modulator of muscle growth during myogenesis, and myostatin inhibitors are attractive drug targets. However, the role of the myostatin pathway in adulthood and the transcription factors involved in the signaling are unclear. Moreover, recent results confirm that other transforming growth factor-β (TGF-β) members control muscle mass. Using genetic tools, we perturbed this pathway in adult myofibers, in vivo, to characterize the downstream targets and their ability to control muscle mass. Smad2 and Smad3 are the transcription factors downstream of myostatin/TGF-β and induce an atrophy program that is muscle RING-finger protein 1 (MuRF1) independent. Furthermore, Smad2/3 inhibition promotes muscle hypertrophy independent of satellite cells but partially dependent of mammalian target of rapamycin (mTOR) signaling. Thus myostatin and Akt pathways cross-talk at different levels. These findings point to myostatin inhibitors as good drugs to promote muscle growth during rehabilitation, especially when they are combined with IGF-1-Akt activators.

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Crossref · 10.1152/ajpcell.00104.2009

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Authors
Sartori, R., Milan, G., Patron, M., Mammucari, C., Blaauw, B., Abraham, R., & Sandri, M.
Affiliations
Veneto Institute of Molecular Medicine (IT)
Venue
American Journal of Physiology-Cell Physiology
Published
2009-06
Volume
296
Issue
6
Pages
C1248-C1257
ISSN
  • 0363-6143 (ISSN-L)
  • 1522-1563
OpenAlex
W2035555824
Cited by
517
References
48
Citations by year
2026: 32 · 2025: 24 · 2024: 25 · 2023: 24 · 2022: 28 · 2021: 34 · 2020: 32 · 2019: 24 · 2018: 37 · 2017: 23 · 2016: 24 · 2015: 28 · 2014: 38 · 2013: 41 · 2012: 38
FWCI
13.81
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Cell Physiology (publishedVersion)
  • PubMed (publishedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › TGF-β signaling in diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
Keywords
Smad2, Smad3, myostatin, muscle mass, muscle atrophy, muscle hypertrophy, TGF-beta signaling, mTOR signaling, AKT pathway, insulin-like growth factor I, myostatin inhibitors, satellite cells
MeSH terms
Tripartite Motif Proteins, Receptor, Transforming Growth Factor-beta Type I, Receptor, Transforming Growth Factor-beta Type II, Age Factors, Animals, Carrier Proteins, Cell Differentiation, Cells, Cultured, Disease Models, Animal, Hypertrophy, Male, Mice, Transgenic, Muscle Denervation, Muscle Proteins, Muscular Atrophy, Mutation, Phosphorylation, Sciatic Nerve, Transfection, Signal Transduction, Transforming Growth Factor beta, Protein Serine-Threonine Kinases, Phosphotransferases (Alcohol Group Acceptor), Receptors, Transforming Growth Factor beta, Muscle, Skeletal, Muscle Development, RNA Interference, RNA, Small Interfering, Ubiquitin-Protein Ligases, Proto-Oncogene Proteins c-akt, Mice, Smad2 Protein, Smad3 Protein, Myostatin, TOR Serine-Threonine Kinases

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