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Biol Reprod 2019 May 01;1005:1147-1157. doi: 10.1093/biolre/ioz034.
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Translational activation of maternally derived mRNAs in oocytes and early embryos and the role of embryonic poly(A) binding protein (EPAB).

Esencan E , Kallen A , Zhang M , Seli E .

Transcription ceases upon stimulation of oocyte maturation and gene expression during oocyte maturation, fertilization, and early cleavage relies on translational activation of maternally derived mRNAs. Two key mechanisms that mediate translation of mRNAs in oocytes have been described in detail: cytoplasmic polyadenylation-dependent and -independent. Both of these mechanisms utilize specific protein complexes that interact with cis-acting sequences located on 3'-untranslated region (3'-UTR), and both involve embryonic poly(A) binding protein (EPAB), the predominant poly(A) binding protein during early development. While mechanistic details of these pathways have primarily been elucidated using the Xenopus model, their roles are conserved in mammals and targeted disruption of key regulators in mouse results in female infertility. Here, we provide a detailed account of the molecular mechanisms involved in translational activation during oocyte and early embryo development, and the role of EPAB in this process.

PubMed ID: 30806655
PMC ID: PMC8127035
Article link: Biol Reprod
Grant support: [+]

Species referenced: Xenopus laevis
Genes referenced: pabpc1l pabpc4

References [+] :
Ackert, Intercellular communication via connexin43 gap junctions is required for ovarian folliculogenesis in the mouse. 2001, Pubmed