Bos indicus cattle possess greater basal concentrations of HSP27, alpha B-crystallin, and HSP70 in skeletal muscle in vivo compared to Bos taurus cattle
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Date
2015-05
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The Ohio State University
Abstract
The objectives of the present study were to evaluate the basal concentrations of heat shock proteins (HSP) between Bos indicus and Bos taurus cattle and determine if HSP basal concentrations change as an animal matures. A total of 40 cattle were used in a 2 × 2 factorial design to evaluate the effects of genotype and age (heifers and mature cows) on basal concentrations of Heat Shock Protein 27 (HSP27), alpha B-crystallin (Cryab), and Heat Shock Protein 70 (HSP70). A muscle sample was collected from the longissimus thoracis (LT) and concentrations of HSP were quantified using ELISA. There were no significant differences in HSP concentration for the interaction between age and genotype or for age alone. Bos indicus cattle had greater (P < 0.05) basal concentrations of HSP27, Cryab, and HSP70 in the LT than Bos taurus cattle. The results of this study suggest that HSP could partially explain differences in tenderness of meat between Bos indicus and Bos taurus cattle.
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beef tenderness, Bos indicus, Bos taurus, heat shock protein, meat quality