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Cellular thermotolerance is inheritable from Holstein cattle cloned with ooplasts of Taiwan native yellow cattle.
Theriogenology 2017 January 16
We have previously demonstrated that the somatic cells from cattle cloned with Holstein (H) donor cells and Taiwan native yellow cattle (Y) ooplasm (Yo-Hd) had better thermotolerance than those from cattle cloned with both Holstein donor cells and ooplasm (Ho-Hd). The present study aimed to investigate whether the cellular thermotolerance of these cloned cattle is transmissible to their offspring (Ho-Hd-F1 and Yo-Hd-F1). Thermotolerance of ear fibroblasts derived from these cloned cattle and their offspring were analyzed. Polymorphisms in mitochondrial DNA (mtDNA) D-loop of ear fibroblasts derived from Yo-Hd and Yo-Hd-F1 indicated that the cytoplasm is originated from Bos indicus (Y). After heat shock, the apoptotic rates, B-cell lymphoma 2-associated X protein/B-cell lymphoma 2 ratios, and relative expression levels of cysteine-aspartic proteases (caspases)-3, -8, and -9 of ear fibroblasts with Y-originated cytoplasm (including Y, Yo-Hd, and Yo-Hd-F1) were lower (P < 0.05) than those of ear fibroblasts with H-originated cytoplasm (including H, Ho-Hd, and Ho-Hd-F1). In contrast, the relative level of HSP-70 was higher (P < 0.05) in ear fibroblasts with Y-originated cytoplasm than that of with H-originated cytoplasm. Based on our results, thermotolerance of ear fibroblasts derived from Yo-Hd and Yo-Hd-F1 cattle is better and can be transmitted, at least at the cellular level, to their offspring.
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