Reduced HSP70 expression under mild hypothermia is involved in bovine embryo growth suppression.

ABSTRACT: Bovine blastocysts cultured under mild hypothermia (MH) can be maintained with non-hatching viable embryos compared to normothermic controls (38.5°C). However, the mechanism by which mildly hypothermic culture delays embryonic growth has not yet been elucidated. This study evaluated the number of cells in embryos cultured under MH conditions and the expression of genes involved in embryonic differentiation. Bovine blastocysts cultured under MH conditions exhibited reduced cell numbers and interferon-tau mRNA expression. Both forkhead box O3 (FOXO3) mRNA expression and FOXO3 protein level in blastocysts cultured under MH conditions were higher than those in normothermic controls (P < 0.05). On the phosphorylated FOXO3 protein level, there was no significant difference between blastocysts cu

SUBMITTER: Ishii T 

PROVIDER: S-EPMC12322498 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature