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Low score normal muscle weakness alters cardiac decorin expression: implication for cardiac collagen fibril organization.

Authors
  • Velleman, S G
  • Ely, D
Type
Published Article
Journal
Poultry science
Publication Date
Dec 01, 2001
Volume
80
Issue
12
Pages
1743–1747
Identifiers
PMID: 11771890
Source
Medline
License
Unknown

Abstract

Cardiac decorin and Type I collagen expression and collagen fibrosis were examined in a chicken line exhibiting the low score normal (LSN) genetic muscle weakness and compared to normal cardiac muscle at 14 and 20 d of embryonic development and at 1 and 6 wk posthatch. These extracellular matrix proteins were selected due to their role in regulating tissue elasticity, which is critical for normal cardiac function. Beginning at 1 wk posthatch, relative levels of decorin were higher in the LSN cardiac muscle than in the control, indicating a time-dependent increase in decorin expression. Type I collagen levels appeared to be unaffected by the LSN condition. Morphologically, myocardial and coronary artery fibrosis did not differ between the control and LSN at all stages examined. These results are suggestive of extracellular matrix remodeling in LSN cardiac muscle that is mediated through a decorin-dependent pathway.

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