Does muscular dystrophy affect metabolic rate?. A study in mdx mice

Esther E. Dupont-Versteegden, Roy A. Baldwin, Roger J. McCarter, Maryelle G. Vonlanthen

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

In this study metabolic consequences of muscular dystrophy were investigated using the mdx mouse model. Measurements were performed on C57BL/10SNJ (control) and dystrophic (mdx) mice of ages 4-6 weeks (young) and 1 year (adult), i.e. at times when muscle degeneration and regeneration are known to be high (young) and low (adult). Whole body metabolic rate (MR) was measured indirectly under usual living conditions by recording O2 consumption and CO2 production over 24 h. Physical activity of mice was measured simultaneously. Oxygen consumption of soleus (SOL) and extensor digitorum longus (EDL) muscles of control and mdx mice was recorded in vitro, using polarographic O2 electrodes. MR in young mdx was significantly decreased compared to young control, but no differences were found in adults. Also, food consumption and physical activity of mdx were decreased significantly compared to control in young but not in adult mice. There was no difference in resting oxygen consumption of muscles from young mdx and control mice, but oxygen consumption of EDL from adult mdx was less than control. Results suggest that muscular dystrophy results in decreased rate of energy metabolism mainly as a consequence of decreased physical activity. The extensive muscular degeneration and regeneration characteristic of muscular dystrophy therefore do not appear to lead to an increase in whole body metabolism.

Original languageEnglish (US)
Pages (from-to)203-207
Number of pages5
JournalJournal of the Neurological Sciences
Volume121
Issue number2
DOIs
StatePublished - Feb 1994

Keywords

  • Dystrophin
  • mdx mouse
  • Metabolic rate
  • Muscle
  • Muscular dystrophy
  • Oxygen consumption

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

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