Cited by 37Muscle Physiology and DisordersCircadian rhythm and melatoninMitochondrial Function and Pathology

Disruptions to the limb muscle core molecular clock coincide with changes in mitochondrial quality control following androgen depletion

Rossetti, Michael L., Esser, Karyn A., Lee, Choogon, Tomko, Robert J., Eroshkin, Alexey M., Gordon, Bradley S.·2019·American Journal of Physiology-Endocrinology and Metabolism

Abstract

Androgen depletion in humans leads to significant atrophy of the limb muscles. However, the pathways by which androgens regulate limb muscle mass are unclear. Our laboratory previously showed that mitochondrial degradation was related to the induction of autophagy and the degree of muscle atrophy following androgen depletion, implying that decreased mitochondrial quality contributes to muscle atrophy. To increase our understanding of androgen-sensitive pathways regulating decreased mitochondrial quality, total RNA from the tibialis anterior of sham and castrated mice was subjected to microarray analysis. Using this unbiased approach, we identified significant changes in the expression of genes that compose the core molecular clock. To assess the extent to which androgen depletion altered the limb muscle clock, the tibialis anterior muscles from sham and castrated mice were harvested every 4 h throughout a diurnal cycle. The circadian expression patterns of various core clock genes and known clock-controlled genes were disrupted by castration, with most genes exhibiting an overall reduction in phase amplitude. Given that the core clock regulates mitochondrial quality, disruption of the clock coincided with changes in the expression of genes involved with mitochondrial quality control, suggesting a novel mechanism by which androgens may regulate mitochondrial quality. These events coincided with an overall increase in mitochondrial degradation in the muscle of castrated mice and an increase in markers of global autophagy-mediated protein breakdown. In all, these data are consistent with a novel conceptual model linking androgen depletion-induced limb muscle atrophy to reduced mitochondrial quality control via disruption of the molecular clock.

Integrity signals

Registry

Crossref · 10.1152/ajpendo.00177.2019

Cites

79 of 79 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Knockout of AR results in the down-regulation of PGC-1α and TFAM in the muscle of castrated rats and mice, while the administration of exogenous androgen reversed these effects.

    “It has been reported that knockout of AR results in the down-regulation of PGC-1α and TFAM in the muscle of castrated rats and mice, while the administration of exogenous androgen reversed these effects (144, 145).”

Cites

Flagged first, then by citations

1 of the 80 references couldn’t be matched to a known paper.

Cited by

Sorted by citations

Authors
Rossetti, M. L., Esser, K. A., Lee, C., Tomko, R. J., Eroshkin, A. M., & Gordon, B. S.
Affiliations
  • Florida State University (US)
  • University of Florida (US)
  • Sanford Burnham Prebys Medical Discovery Institute (US)
Corresponding author
Gordon, Bradley S.
Venue
American Journal of Physiology-Endocrinology and Metabolism
Published
2019-10-01
Volume
317
Issue
4
Pages
E631-E645
ISSN
  • 0193-1849 (ISSN-L)
  • 1522-1555
OpenAlex
W2966233099
Cited by
37
References
80
Citations by year
2026: 2 · 2025: 4 · 2024: 4 · 2023: 8 · 2022: 6 · 2021: 7 · 2020: 4 · 2019: 1 · 2018: 1
FWCI
1.49
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Endocrinology and Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Institute for Successful Longevity
  • HHS | National Institutes of Health (R01AR066082, NS-099813)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
Keywords
castration, circadian clock, core clock genes, mitochondrial quality control, mitochondrial degradation, autophagy, tibialis anterior, clock-controlled genes, diurnal gene expression
MeSH terms
Androgens, Animals, Atrophy, Autophagy, Body Weight, Extremities, Male, Mice, Inbred C57BL, Mitochondria, Muscle, Orchiectomy, Testosterone, Tibia, Muscle, Skeletal, Mice, Circadian Rhythm Signaling Peptides and Proteins, Mitophagy

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review