Luteotropic and Luteolytic Factors Modulate the Expression of Nuclear Receptor Coregulators in Bovine Luteal Cells Independently of Histone Acetyltransferase and Histone Deacetylase Activities

Abstract

The aims of this study were to examine the effect of luteotropic and luteolytic factors on the mRNA and protein expression of the coactivators HAT: histone acetyltransferase p300 (P300), cyclic adenosine monophosphate response element-binding protein (CREB), and steroid receptor coactivator-1 (SRC-1) and the corepressor: nuclear receptor corepressor-2 (NCOR-2) in bovine luteal cells on days 6–10 and 16–20. HAT and HDAC activities were also measured. The obtained results showed that luteotropic and luteolytic factors influence changes in the mRNA and protein levels of the coregulators of PGRs. However, they did not affect the activity of related HAT and HDAC, respectively. Therefore, it is possible that these factors, through changes in the expression of nuclear receptor coactivators and corepressors, may affect the functioning of the nuclear receptors, including PGRs, in the bovine CL.

Promotor Analysis of Cattle Endometrium throughout Oestrous Cycle and Early Gestation Period

“…Progesterone is a steroid hormone predominantly produced by the corpus luteum after ovulation and exerts its primary action by activating progesterone receptor [30]. Also Rekawiecki R et al [31] reported "the cause of these processes is progesterone, which, on the genomic pathway, performances over nuclear receptors that, by attributing to the promoter of a target gene, activate its transcription".…”