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Episodic hypoxia exacerbates respiratory muscle dysfunction in DMD mdx mice
Author(s) -
Farkas Gaspar A.,
Mccormick Kathleen M.,
Gosselin Luc E.
Publication year - 2007
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.20858
Subject(s) - duchenne muscular dystrophy , mdx mouse , respiratory system , medicine , dystrophin , hypoxia (environmental) , cardiology , diaphragm (acoustics) , ventilation (architecture) , intermittent hypoxia , endocrinology , obstructive sleep apnea , chemistry , oxygen , mechanical engineering , physics , organic chemistry , acoustics , loudspeaker , engineering
Many patients with Duchenne muscular dystrophy (DMD) are eventually diagnosed with sleep‐disordered breathing (SDB). SDB is associated with reduced ventilation, decreased arterial oxygen tension, and increased respiratory muscle recruitment during sleep, factors that could be especially detrimental to respiratory muscles in DMD. To assess whether SDB impacts dystrophin‐deficient respiratory muscle function and fibrosis, diaphragm strength, and collagen content were evaluated in dystrophic mice (Dmd mdx ) exposed to experimental SDB. Diurnal exposure to episodic hypoxia resulted in a 30% reduction in diaphragm strength without affecting collagen content. Episodic hypoxia secondary to SDB can exacerbate respiratory muscle dysfunction in DMD. Muscle Nerve, 2007