Search Results
You are looking at 1 - 1 of 1 items for
- Author: Ricardo Perecin Nociti x
- Refine by access: All content x
Search for other papers by João Vitor Alcantara da Silva in
Google Scholar
PubMed
Search for other papers by Jessica Ispada in
Google Scholar
PubMed
Search for other papers by Ricardo Perecin Nociti in
Google Scholar
PubMed
Search for other papers by Aldcejam Martins da Fonseca Junior in
Google Scholar
PubMed
Search for other papers by Camila Bruna de Lima in
Google Scholar
PubMed
Search for other papers by Erika Cristina dos Santos in
Google Scholar
PubMed
Search for other papers by Marcos Roberto Chiaratti in
Google Scholar
PubMed
Search for other papers by Marcella Pecora Milazzotto in
Google Scholar
PubMed
In brief
Pyruvate metabolism is one of the main metabolic pathways during oocyte maturation. This study demonstrates that pyruvate metabolism also regulates the epigenetic and molecular maturation in bovine oocytes.
Abstract
Pyruvate, the final product of glycolysis, undergoes conversion into acetyl-CoA within the mitochondria of oocytes, serving as a primary fuel source for the tricarboxylic acid (TCA) cycle. The citrate generated in the TCA cycle can be transported to the cytoplasm and converted back into acetyl-CoA. This acetyl-CoA can either fuel lipid synthesis or act as a substrate for histone acetylation. This study aimed to investigate how pyruvate metabolism influences lysine 9 histone 3 acetylation (H3K9ac) dynamics and RNA transcription in bovine oocytes during in vitro maturation (IVM). Bovine cumulus–oocyte complexes were cultured in vitro for 24 h, considering three experimental groups: Control (IVM medium only), DCA (IVM supplemented with sodium dichloroacetate, a stimulant of pyruvate oxidation into acetyl-CoA), or IA (IVM supplemented with sodium iodoacetate, a glycolysis inhibitor). The results revealed significant alterations in oocyte metabolism in both treatments, promoting the utilization of lipids as an energy source. These changes during IVM affected the dynamics of H3K9ac, subsequently influencing the oocyte's transcriptional activity. In the DCA and IA groups, a total of 148 and 356 differentially expressed genes were identified, respectively, compared to the control group. These findings suggest that modifications in pyruvate metabolism trigger the activation of metabolic pathways, particularly lipid metabolism, changing acetyl-CoA availability and H3K9ac levels, ultimately impacting the mRNA content of in vitro matured bovine oocytes.