Cited by 104Muscle metabolism and nutritionMuscle Physiology and DisordersNutrition and Health in Aging

Amino acid sensing in skeletal muscle

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Moro, Tatiana, Ebert, Scott M., Adams, Christopher M., Rasmussen, Blake B.·2016·Trends in Endocrinology & Metabolism

Abstract

Aging impairs skeletal muscle protein synthesis, leading to muscle weakness and atrophy. However, the underlying molecular mechanisms remain poorly understood. Here, we review evidence that mammalian/mechanistic target of rapamycin complex 1 (mTORC1)-mediated and activating transcription factor 4 (ATF4)-mediated amino acid (AA) sensing pathways, triggered by impaired AA delivery to aged skeletal muscle, may play important roles in skeletal muscle aging. Interventions that alleviate age-related impairments in muscle protein synthesis, strength, and/or muscle mass appear to do so by reversing age-related changes in skeletal muscle AA delivery, mTORC1 activity, and/or ATF4 activity. An improved understanding of the mechanisms and roles of AA sensing pathways in skeletal muscle may lead to evidence-based strategies to attenuate sarcopenia.

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Authors
Moro, T., Ebert, S. M., Adams, C. M., & Rasmussen, B. B.
Affiliations
  • The University of Texas Medical Branch at Galveston (US)
  • University of Iowa (US)
Corresponding author
Rasmussen, Blake B.
Venue
Trends in Endocrinology & Metabolism
Publisher
Elsevier BV
Published
2016-11
Volume
27
Issue
11
Pages
796-806
ISSN
1043-2760 (ISSN-L)
OpenAlex
W2497214543
Cited by
104
References
69
Citations by year
2026: 11 · 2025: 7 · 2024: 14 · 2023: 10 · 2022: 9 · 2021: 17 · 2020: 13 · 2019: 10 · 2018: 9 · 2017: 3 · 2016: 1
FWCI
0.83
Type
journal article
Language
en
Open access
Locations
  • Trends in Endocrinology and Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • U.S. Department of Veterans Affairs (I01 BX000976, I01 RX001477)
  • National Institute on Aging (R56AG051267, R43AG044898, R41AG047684, P30AG024832)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (R43AR069400, R01AR059115)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
Keywords
amino acid sensing, skeletal muscle aging, mTORC1, ATF4, muscle protein synthesis, sarcopenia, muscle atrophy, muscle weakness, muscle mass
MeSH terms
Ursolic Acid, Amino Acids, Animals, Humans, Triterpenes, Muscle, Skeletal, Activating Transcription Factor 4, TOR Serine-Threonine Kinases

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