Document Detail

Collagen content and architecture of the pectoralis muscle in male chicks and broilers reared under various nutritional conditions.
MedLine Citation:
PMID:  20438508     Owner:  NLM     Status:  MEDLINE    
Varying chicken growth rates were induced with different nutritional regimes, and the collagen content and architecture of M. pectoralis (PT) were compared among 21-day-old chicks and broilers at 80 or 95 days of age. The percentage of muscle weight to live weight was higher in rapid growing chicks (8.4%) than slow growing chicks (6.3%). The 80-day-old broilers engaged in compensatory growth after the early slow growth period producing PT muscle at 11% of live weight. The 80- and 95-day-old chicks with restricted late growth after an early rapid growth period showed PT weight at 8% and 9% of live weight, respectively. Collagen content of the PT muscle markedly decreased from the chicks to the broilers. The collagen concentration was higher in the late-growth restricted broilers (1.67-1.88 mg/g) than the compensatory growth broilers (1.01-1.10 mg/g). Collagen concentration did not differ between the rapid and slow growing chicks (2.72 and 2.94 mg/g). Scanning electron micrographs showed thick and thin perimysia, and honeycomb endomysia. In the perimysia, a stack layer of collagen platelets and a reticular layer of collagen fiber cords were distinguished and collagen baskets of adipocytes were observed. The perimysial collagen fibers became thicker during growth of the chicks to broilers. However, in the late-growth restricted broilers, the perimysial collagen fibers seemed to have retarded development compared with the compensatory growth birds. The PT muscle of chickens develops optimally when body growth is enhanced. The PT muscle of the compensatory growth broilers had improved collagen architecture regardless of the marked decrease in collagen content.
Chamali Das; Bimol Chandra Roy; Ichiro Oshima; Hideyuki Miyachi; Shotaro Nishimura; Hisao Iwamoto; Shoji Tabata
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Animal science journal = Nihon chikusan Gakkaih?     Volume:  81     ISSN:  1740-0929     ISO Abbreviation:  Anim. Sci. J.     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-05-04     Completed Date:  2010-06-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100956805     Medline TA:  Anim Sci J     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  252-63     Citation Subset:  IM    
Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Higashi Fukuoka.
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MeSH Terms
Animal Nutritional Physiological Phenomena
Chickens / growth & development*
Collagen / analysis*
Microscopy, Electron, Scanning
Pectoralis Muscles / chemistry*,  growth & development*,  ultrastructure
Reg. No./Substance:

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