The Effects of Heat Shock Protein 70 Addition in the Culture Medium on the Development and Quality of In Vitro Produced Heat Shocked Bovine Embryos

Animals

Themistoklis Giannoulis¹  Eleni Dovolou²  Konstantina Stamperna²  Katerina Dadouli²  Ioannis Nanas²  Georgios S. Amiridis²  Maria Kalemkeridou³  Katerina Moutou³  Zissis Mamuris³ 

[1] Department of Animal Sciences, University of Thessaly, 413 36 Larissa, Greece;Department of Obstetrics and Reproduction, Veterinary Faculty, University of Thessaly, 431 00 Karditsa, Greece;Laboratory of Genetics, Comparative and Evolutionary Biology, Department of Biochemistry and Biotechnology, University of Thessaly, 413 36 Larissa, Greece;

关键词: HSP70;    heat stress;    in vitro embryos;    gene expression;    cattle;   

DOI  :  10.3390/ani11123347

来源: DOAJ

【 摘 要 】

The aims of the present study were to examine the effects of HSP70 addition in the in vitro culture medium of day 3 embryos on their developmental competence and quality. Bovine oocytes (n = 1442) were in vitro matured, inseminated and cultured for the first two days according to standardized methods. The presumptive zygotes were randomly allocated in three experimental groups: Control, C (embryos cultured at 39 °C throughout the culture period), group C41 (temperature was raised to 41 °C from the 48th to 72nd h post insemination (p.i.) and then it returned at 39 °C for the remaining culture period), and group H41 (the temperature modification was the same as in C41 and during heat exposure, HSP70 was added in the culture medium). Cleavage and embryo yield were assessed 48 h p.i. and on days 7, 8, 9, respectively and gene expression in day 7 blastocysts was assessed by RT-PCR. Blastocyst yield was the highest in group C39; and higher in group H41 compared to group C41. From the gene expression analyses, altered expression of 11 genes was detected among groups. The analysis of the orchestrated patterns of gene expression differed between groups. The results of this study confirm the devastating effects of heat stress on embryo development and provide evidence that HSP70 addition at the critical stages can partly counterbalance, without neutralizing, the negative effects of the heat insult on embryos, acting mainly through mechanisms related to energy deployment.

【 授权许可】

Unknown