Abstract
The objective of this study was to determine the effects of fatty acids on the proliferation, differentiation, and expression of syndecan-4 and glypican-1 in avian myogenic satellite cells (SC). SC derived from the pectoralis major (PM) and biceps femoris (BF) muscles of the turkey and chicken were individually administered 8 different fatty acids in defined medium during proliferation. A parallel set of turkey SC was induced to differentiate. Highest levels of proliferation of turkey PM and BF SC occurred in cultures containing oleate. Linoleate and oleate were equipotent in supporting proliferation of chicken SC. Microscopic examination revealed that inclusion of docosahexaenoate or eicosapentaenoate was toxic towards both PM and BF SC from both species. Linolenate and arachidonate diminished levels of differentiation. Expression of glypican-1 varied between treatments to a greater extent with turkey BF than with PM SC. Expression in chicken PM and BF SC demonstrated a similar pattern in response to treatments. Turkey PM syndecan-4 expression varied between treatments, whereas expression in turkey BF SC was similar between treatments. Expression in chicken SC varied little between treatments. The results demonstrate species and muscle-specific differences in the parameters examined. It is proposed that changes in lipid raft receptor interactions may contribute to these observed differences.
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