Cited by 13Muscle Physiology and DisordersMeat and Animal Product QualityHemoglobin structure and function

Hemin enhances differentiation and maturation of cultured regenerated skeletal myotubes

Funanage, Vicky L., Schroedl, Nancy A., Moses, Priscilla A., Smith, Susan M., Kirwin, James J., Hartzell, Charles R.·1989·Journal of Cellular Physiology

Abstract

Satellite cells, isolated from marcaine‐damaged rat skeletal muscle, differentiate in culture to form contracting, cross‐striated myotubes. Addition of 20 μM hemin (ferriprotoporphyrin IX chloride) to the culture medium resulted in increases in the number, size, and alignment of myotubes; in the number of myotubes that exhibited cross‐striations; and in the strength and frequency of myotube contractions. Hemin increased satellite cell fusion by 27%, but decreased cell proliferative rate by 30%. Hemin increased the specific activity of creatine kinase (CK), a sensitive indicator of muscle differentiation, by 157%. Separation of CK isoenzymes by agarose gel electrophoresis showed that hemin increased only the muscle‐specific CK isoenzymes (MM‐CK and MB‐CK). Thus, hemin seems to duplicate some of the effects of innervation on cultured myotubes by increasing contraction frequency and strength, appearance of cross‐striations, and muscle‐specific isoenzymes. In contrast, 3‐amino‐1,2,4‐triazole, an inhibitor of heme biosynthesis, decreased the number of cross‐striated myotubes, the strength and frequency of myotube contractions, and CK activity. These inhibitory effects were reversed by hemin. Collectively, these results demonstrate a physiologically significant role for heme in myotube maturation.

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Authors
Funanage, V. L., Schroedl, N. A., Moses, P. A., Smith, S. M., Kirwin, J. J., & Hartzell, C. R.
Affiliations
DuPont (United States) (US)
Corresponding author
Funanage, Vicky L.
Venue
Journal of Cellular Physiology
Publisher
Wiley
Published
1989-12
Volume
141
Issue
3
Pages
591-597
ISSN
  • 0021-9541 (ISSN-L)
  • 1097-4652
OpenAlex
W2002841565
Cited by
13
References
35
Citations by year
2022: 1 · 2020: 1 · 2015: 1
FWCI
0.63
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Cellular Physiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Meat and Animal Product Quality
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
Keywords
hemin, skeletal muscle regeneration, satellite cells, myotube differentiation, myotube maturation, cell fusion, creatine kinase isoenzymes, heme biosynthesis, 3-amino-1,2,4-triazole, muscle innervation, cross-striations
MeSH terms
Animals, Cell Differentiation, Cell Fusion, Cells, Cultured, Creatine Kinase, Dose-Response Relationship, Drug, Heme, Hemin, Iron, Isoenzymes, Male, Muscle Contraction, Muscles, Regeneration, Transferrin, Rats

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