Zebrafish sperm outsource activation to eggs’ protease-activated receptors

by Rafael A. Fissore, Emily M. Lopes, Francesca Carpentiero The calcium surge that starts embryogenesis varies across species and is elusive in many. A new study in PLOS Biology shows that zebrafish eggs self-activate, initiating a protease-activated receptor calcium wave and uncovering a novel pathway in egg activation. The calcium surge that starts embryogenesis varies across species. A new study in PLOS Biology presents a novel mechanism of egg activation in zebrafish, wherein protease-activated receptors mediate a calcium signal that initiates egg activation before sperm entry.

Jun 18, 2025 - 19:55
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Zebrafish sperm outsource activation to eggs’ protease-activated receptors

by Rafael A. Fissore, Emily M. Lopes, Francesca Carpentiero The calcium surge that starts embryogenesis varies across species and is elusive in many. A new study in PLOS Biology shows that zebrafish eggs self-activate, initiating a protease-activated receptor calcium wave and uncovering a novel pathway in egg activation. The calcium surge that starts embryogenesis varies across species. A new study in PLOS Biology presents a novel mechanism of egg activation in zebrafish, wherein protease-activated receptors mediate a calcium signal that initiates egg activation before sperm entry.