Cited by 372Muscle Physiology and DisordersAdipose Tissue and MetabolismNutrition and Health in Aging

Fatty infiltration of skeletal muscle: mechanisms and comparisons with bone marrow adiposity

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Hamrick, Mark W., McGee-Lawrence, Meghan E., Frechette, Danielle M.·2016·Frontiers in Endocrinology

Abstract

Skeletal muscle and bone share common embryological origins from mesodermal cell populations and also display common growth trajectories early in life. Moreover, muscle and bone are both mechanoresponsive tissues, and the mass and strength of both tissues decline with age. The decline in muscle and bone strength that occurs with aging is accompanied in both cases by an accumulation of adipose tissue. In bone, adipocyte (AC) accumulation occurs in the marrow cavities of long bones and is known to increase with estrogen deficiency, mechanical unloading, and exposure to glucocorticoids. The factors leading to accumulation of intra- and intermuscular fat (myosteatosis) are less well understood, but recent evidence indicates that increases in intramuscular fat are associated with disuse, altered leptin signaling, sex steroid deficiency, and glucocorticoid treatment, factors that are also implicated in bone marrow adipogenesis. Importantly, accumulation of ACs in skeletal muscle and accumulation of intramyocellular lipid are linked to loss of muscle strength, reduced insulin sensitivity, and increased mortality among the elderly. Resistance exercise and whole body vibration can prevent fatty infiltration in skeletal muscle and also improve muscle strength. Therapeutic strategies to prevent myosteatosis may improve muscle function and reduce fall risk in the elderly, potentially impacting the incidence of bone fracture.

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Authors
Hamrick, M. W., McGee-Lawrence, M. E., & Frechette, D. M.
Affiliations
  • Augusta University (US)
  • Stony Brook University (US)
Corresponding author
Hamrick, Mark W.
Venue
Frontiers in Endocrinology
Published
2016-06-20
Volume
7
Pages
69-69
ISSN
1664-2392 (ISSN-L)
OpenAlex
W2434673825
Cited by
372
References
80
Citations by year
2026: 31 · 2025: 31 · 2024: 43 · 2023: 41 · 2022: 62 · 2021: 45 · 2020: 39 · 2019: 34 · 2018: 31 · 2017: 15
FWCI
2.41
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Endocrinology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (NIA AG036675)
  • American Diabetes Association (1-16-JDF-062)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
Keywords
myosteatosis, bone marrow adiposity, intramuscular fat, aging, muscle strength, glucocorticoids, disuse, leptin signaling, sex hormone deficiency, estrogen deficiency, mechanical unloading, resistance training, whole-body vibration, insulin sensitivity, fall risk, bone fractures

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