Evolutionarily conserved ovarian fluid proteins are responsible for extending egg viability in salmonid fish
2024
Gueho, Aurélie | Żarski, Daniel | Rime, Hélène | Guével, Blandine | Com, Emmanuelle | Lavigne, Regis | Nguyen, Thuy Thao Vi | Montfort, Jérôme | Pineau, Charles | Bobe, Julien | Laboratoire de Physiologie et Génomique des Poissons = Fish Physiology and Genomics Institute (LPGP) ; Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Polska Akademia Nauk = Polish Academy of Sciences = Académie polonaise des sciences (PAN) | École des Hautes Études en Santé Publique [EHESP] (EHESP) | Institut de recherche en santé, environnement et travail (Irset) ; Université d'Angers (UA)-Université de Rennes (UR)-École des Hautes Études en Santé Publique [EHESP] (EHESP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ) | Agence Nationale de la Recherche: EggPreserve # ANR-16-CE20-0001 | ANR-16-CE20-0001,EggPreserve,Iddentification de protéines du fluide ovarien impliquées dans la préservation de la qualité des oeufs de poisson(2016)
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Show more [+] Less [-]English. In contrast to most fishes, salmonids exhibit the unique ability to hold their eggs for several days after ovulation without significant loss of viability. During this period, eggs are held in the body cavity in a biological fluid, the coelomic fluid (CF) that is responsible for preserving egg viability. To identify CF proteins responsible for preserving egg viability, a proteomic comparison was performed using 3 salmonid species and 3 non-salmonid species to identify salmonid-specific highly abundant proteins. In parallel, rainbow trout CF fractions were purified and used in a biological test to estimate their egg viability preservation potential. The most biologically active CF fractions were then subjected to mass spectrometry analysis. We identified 50 proteins overabundant in salmonids and present in analytical fractions with high egg viability preservation potential. The identity of these proteins illuminates the biological processes participating in egg viability preservation. Among identified proteins of interest, the ovarian-specific expression and abundance in CF at ovulation of N-acetylneuraminic acid synthase a (Nansa) suggest a previously unsuspected role. We show that salmonid CF is a complex biological fluid containing a diversity of proteins related to immunity, calcium binding, lipid metabolism, proteolysis, extracellular matrix and sialic acid metabolic pathway that are collectively responsible for preserving egg viability.
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