Han 2017 Cell Rep

Han Y, Ishibashi S, Iglesias-Gonzalez J, Chen Y, Love NR, Amaya E. (2018) Ca2+-Induced Mitochondrial ROS Regulate the Early Embryonic Cell Cycle. Cell Rep 22:218-231.

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Han Y, Ishibashi S, Iglesias-Gonzalez J, Chen Y, Love NR, Amaya E. (2018) Cell Rep

Abstract: While it is appreciated that reactive oxygen species (ROS) can act as second messengers in both homeostastic and stress response signaling pathways, potential roles for ROS during early vertebrate development have remained largely unexplored. Here, we show that fertilization in Xenopus embryos triggers a rapid increase in ROS levels, which oscillate with each cell division. Furthermore, we show that the fertilization-induced Ca2+ wave is necessary and sufficient to induce ROS production in activated or fertilized eggs. Using chemical inhibitors, we identified mitochondria as the major source of fertilization-induced ROS production. Inhibition of mitochondrial ROS production in early embryos results in cell-cycle arrest, in part, via ROS-dependent regulation of Cdc25C activity. This study reveals a role for oscillating ROS levels in early cell cycle regulation in Xenopus embryos. • Keywords: Ca(2+) wave, Cdc25C, HyPer, ROS, Xenopus, cell cycle, fertilization, mitochondria, reactive oxygen species, respiratory burst • Bioblast editor: Iglesias-Gonzalez J • O2k-Network Lab: AT Innsbruck Oroboros, ES Santiago De Compostela Mendez-Alvarez E, UK Manchester Galli GL

Labels: MiParea: Respiration