Cited by 423Muscle Physiology and DisordersMicroRNA in disease regulationSpaceflight effects on biology

MicroRNA-1 and microRNA-133a expression are decreased during skeletal muscle hypertrophy

McCarthy, John J., Esser, Karyn A.·2007·Journal of Applied Physiology

Abstract

MicroRNAs (miRNAs) are a class of highly conserved, noncoding RNAs involved in posttranscriptional gene regulation. A small number of muscle-specific miRNAs have been identified and shown to have a role in myoblast proliferation and differentiation as well as embryonic muscle growth. The primary objective of the present study was to determine the expression level of the muscle-specific miRNAs in the soleus and plantaris muscles and whether their expression in the plantaris was altered in response to functional overload. Of the miRNAs examined, only miRNA-206 was differentially expressed between soleus and plantaris muscles, as reflected by the sevenfold higher expression in the soleus for both the primary miRNA (pri-miRNA) and mature miRNA (miR). Following 7 days of functional overload, transcript levels for both pri-miRNA-1-2 and pri-miRNA-133a-2 increased by approximately 2-fold, whereas pri-miRNA-206 levels were elevated 18.3-fold. In contrast, expression of miR-1 and miR-133a were downregulated by approximately 50% following overload. The discrepancy between pri-miRNA and miR expression following overload was not explained by a change in the expression of components of the miRNA biogenesis pathway, since Drosha and Exportin-5 transcript levels were significantly increased by 50% in response to functional overload, whereas Dicer expression remained unchanged. These results are the first to report alterations in expression of muscle-specific miRNAs in adult skeletal muscle and suggest miRNAs may have a role in the adaptation to functional overload.

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Crossref · 10.1152/japplphysiol.00932.2006

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Authors
McCarthy, J. J., & Esser, K. A.
Affiliations
University of Kentucky (US)
Venue
Journal of Applied Physiology
Published
2007-01
Volume
102
Issue
1
Pages
306-313
ISSN
  • 0161-7567 (ISSN-L)
  • 8750-7587
  • 1522-1601
OpenAlex
W2044004072
Cited by
423
References
46
Citations by year
2026: 9 · 2025: 15 · 2024: 12 · 2023: 9 · 2022: 17 · 2021: 19 · 2020: 26 · 2019: 24 · 2018: 21 · 2017: 33 · 2016: 31 · 2015: 32 · 2014: 36 · 2013: 20 · 2012: 26
FWCI
6.65
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Applied Physiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Arthritis and Musculoskeletal and Skin Diseases (AR 45617, R01AR045617)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Health Sciences › Medicine › Physiology › Spaceflight effects on biology
Keywords
miR-1, microRNA-133a, miR-206, skeletal muscle hypertrophy, functional overload, soleus muscle, plantaris muscle, muscle-specific microRNAs, microRNA biogenesis, Drosha, XPO5, Dicer, post-transcriptional regulation, muscle adaptation
MeSH terms
Animals, Gene Expression Regulation, Hypertrophy, Male, Mice, Inbred C57BL, Phenotype, Physical Conditioning, Animal, Muscle, Skeletal, Karyopherins, MicroRNAs, Ribonuclease III, Mice

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