FN Archimer Export Format
PT J
TI Pituitary Hormones mRNA Abundance in the Mediterranean Sea Bass Dicentrarchus labrax: Seasonal Rhythms, Effects of Melatonin and Water Salinity
BT 
AF Falcón, Jack
   Herrero, Maria Jesus
   Nisembaum, Laura Gabriela
   Isorna, Esther
   Peyric, Elodie
   Beauchaud, Marilyn
   Attia, Joël
   Covès, Denis
   Fuentès, Michael
   Delgado, Maria Jesus
   Besseau, Laurence
AS 1:1,2;2:2;3:2,3;4:3;5:2;6:4;7:4;8:5;9:2;10:3;11:2;
FF 1:;2:;3:;4:;5:;6:;7:;8:PDG-RBE-MARBEC-LAAAS;9:;10:;11:;
C1 Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), MNHN, CNRS UMR 8067, SU, IRD 207, UCN, UA, Paris, France
   Sorbonne Université, CNRS, Biologie Intégrative des Organismes Marins (BIOM), Banyuls-sur-Mer, France
   Department of Genetics, Physiology and Microbiology, Complutense University of Madrid (UCM), Madrid, Spain
   Equipe de Neuro-Ethologie Sensorielle, ENES/CRNL, CNRS UMR 5292, UMR-S 1028, Faculté des Sciences et Techniques, Université Jean-Monnet (UJM), Saint-Étienne, France
   Station Ifremer de Palavas, Palavas-les-Flots, Nantes, France
C2 MNHN, FRANCE
   UNIV SORBONNE, FRANCE
   UNIV MADRID, SPAIN
   UNIV ST ETIENNE, FRANCE
   IFREMER, FRANCE
SI PALAVAS
SE PDG-RBE-MARBEC-LAAAS
UM MARBEC
IN WOS Ifremer UMR
   DOAJ
   copubli-france
   copubli-europe
   copubli-univ-france
IF 4.755
TC 1
UR https://archimer.ifremer.fr/doc/00740/85247/90272.pdf
   https://archimer.ifremer.fr/doc/00740/85247/90273.jpeg
   https://archimer.ifremer.fr/doc/00740/85247/90274.jpeg
   https://archimer.ifremer.fr/doc/00740/85247/90275.jpeg
   https://archimer.ifremer.fr/doc/00740/85247/90276.docx
LA English
DT Article
DE ;sea bass;pituitary;hormones;annual variations;melatonin;photoperiod;salinity
AB In fish, most hormonal productions of the pituitary gland display daily and/or seasonal rhythmic patterns under control by upstream regulators, including internal biological clocks. The pineal hormone melatonin, one main output of the clocks, acts at different levels of the neuroendocrine axis. Melatonin rhythmic production is synchronized mainly by photoperiod and temperature. Here we aimed at better understanding the role melatonin plays in regulating the pituitary hormonal productions in a species of scientific and economical interest, the euryhaline European sea bass Dicentrarchus labrax. We investigated the seasonal variations in mRNA abundance of pituitary hormones in two groups of fish raised one in sea water (SW fish), and one in brackish water (BW fish). The mRNA abundance of three melatonin receptors was also studied in the SW fish. Finally, we investigated the in vitro effects of melatonin or analogs on the mRNA abundance of pituitary hormones at two times of the year and after adaptation to different salinities. We found that (1) the reproductive hormones displayed similar mRNA seasonal profiles regardless of the fish origin, while (2) the other hormones exhibited different patterns in the SW vs. the BW fish. (3) The melatonin receptors mRNA abundance displayed seasonal variations in the SW fish. (4) Melatonin affected mRNA abundance of most of the pituitary hormones in vitro; (5) the responses to melatonin depended on its concentration, the month investigated and the salinity at which the fish were previously adapted. Our results suggest that the productions of the pituitary are a response to multiple factors from internal and external origin including melatonin. The variety of the responses described might reflect a high plasticity of the pituitary in a fish that faces multiple external conditions along its life characterized by marked daily and seasonal changes in photoperiod, temperature and salinity. 
PY 2021
PD DEC
SO Frontiers In Physiology
SN 1664-042X
PU Frontiers Media SA
VL 12
UT 000738797200001
DI 10.3389/fphys.2021.774975
ID 85247
ER

EF