marine drugs Article Transcriptome Profiling of the Pacific Oyster Crassostrea gigas Visceral Ganglia over a Reproduction Cycle Identifies Novel Regulatory Peptides Emilie Réalis-Doyelle 1,†, Julie Schwartz 1,Cédric Cabau 2, Lorane Le Franc 1, Benoit Bernay 3, Guillaume Rivière 1, Christophe Klopp 2 and Pascal Favrel 1,* 1 UMR BOREA, UNICAEN, MNHN, CNRS-8067, IRD-207, Normandie Université, Sorbonne Université, Esplanade de la Paix, 14032 Caen, France;
[email protected] (E.R.-D.);
[email protected] (J.S.);
[email protected] (L.L.F.);
[email protected] (G.R.) 2 Plateforme Sigenae, BP 52627, UR875 Mathématiques et Informatique Appliquées de Toulouse, INRAE, 31326 Castanet-Tolosan, France;
[email protected] (C.C.);
[email protected] (C.K.) 3 PROTEOGEN Core Facility SF 4206 ICORE, UNICAEN, Esplanade de la Paix, 14032 Caen, France;
[email protected] * Correspondence:
[email protected] † Correspondence address: UMR CARTEL, INRAE/USMB, 74203 Thonon-Les-Bains, France. Abstract: The neuropeptides involved in the regulation of reproduction in the Pacific oyster (Cras- sostrea gigas) are quite diverse. To investigate this diversity, a transcriptomic survey of the visceral ganglia (VG) was carried out over an annual reproductive cycle. RNA-seq data from 26 samples corresponding to VG at different stages of reproduction were de novo assembled to generate a specific Citation: Réalis-Doyelle, E.; reference transcriptome of the oyster nervous system and used to identify differentially expressed Schwartz, J.; Cabau, C.; Le Franc, L.; transcripts. Transcriptome mining led to the identification of novel neuropeptide precursors (NPPs) Bernay, B.; Rivière, G.; Klopp, C.; related to the bilaterian Eclosion Hormone (EH), crustacean female sex hormone/Interleukin 17, Favrel, P.