Five questions toward mRNA degradation in oocytes and preimplantation embryos: when, who, to whom, how, and why?†

Zhi-Yan Jiang; Heng-Yu Fan

doi:10.1093/biolre/ioac014

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29 January 2022 Five questions toward mRNA degradation in oocytes and preimplantation embryos: when, who, to whom, how, and why?

Zhi-Yan Jiang, Heng-Yu Fan

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Biology of Reproduction, 107(1):62-75 (2022). https://doi.org/10.1093/biolre/ioac014

Abstract

RNA—the primary product of the genome—is subject to various biological events during its lifetime. During mammalian gametogenesis and early embryogenesis, germ cells and preimplantation embryos undergo marked changes in the transcriptome, including mRNA turnover. Various factors, including specialized proteins, RNAs, and organelles, function in an intricate degradation system, and the degradation selectivity is determined by effectors and their target mRNAs. RNA homeostasis regulators and surveillance factors function in the global transcriptome of oocytes and somatic cells. Other factors, including BTG4, PABPN1L, the CCR4-NOT subunits, CNOT6L and CNOT7, and TUTs, are responsible for two maternal mRNA avalanches: M- and Z-decay. In this review, we discuss recent advances in mRNA degradation mechanisms in mammalian oocytes and preimplantation embryos. We focused on the studies in mice, as a model mammalian species, and on RNA turnover effectors and the cis-elements in targeting RNAs.

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Zhi-Yan Jiang and Heng-Yu Fan "Five questions toward mRNA degradation in oocytes and preimplantation embryos: when, who, to whom, how, and why?," Biology of Reproduction 107(1), 62-75, (29 January 2022). https://doi.org/10.1093/biolre/ioac014

Received: 25 November 2021; Accepted: 15 January 2022; Published: 29 January 2022

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