Pituitary hormones mRNA abundance in the Mediterranean sea bass Dicentrarchus labrax: seasonal rhythms, effects of melatonin and water salinity

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dc.contributor.authorFalcón, Jack
dc.contributor.authorHerrero, María Jesús
dc.contributor.authorNisembaum, Laura Gabriela
dc.contributor.authorIsorna Alonso, Esther
dc.contributor.authorPeyric, Elodie
dc.contributor.authorBeauchaud, Marilyn
dc.contributor.authorAttia, Joël
dc.contributor.authorCovès, Denis
dc.contributor.authorFuentès, Michel
dc.contributor.authorDelgado Saavedra, María Jesús
dc.contributor.authorBesseau, Laurence
dc.date.accessioned2023-06-16T14:23:50Z
dc.date.available2023-06-16T14:23:50Z
dc.date.issued2021-12-15
dc.description.abstractIn 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.
dc.description.departmentDepto. de Genética, Fisiología y Microbiología
dc.description.facultyFac. de Ciencias Biológicas
dc.description.refereedTRUE
dc.description.sponsorshipUnión Europea. FP7
dc.description.sponsorshipCNRS/IFREMER/UJM/UPMC
dc.description.sponsorshipFundación "Martín Escudero"(España)
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/72772
dc.identifier.doi10.3389/fphys.2021.774975
dc.identifier.issnElectronic: 1664-042X
dc.identifier.officialurlhttps://doi.org/10.3389/fphys.2021.774975
dc.identifier.relatedurlhttps://www.frontiersin.org/articles/10.3389/fphys.2021.774975/full
dc.identifier.urihttps://hdl.handle.net/20.500.14352/4927
dc.issue.number774975
dc.journal.titleFrontiers in Physiology
dc.language.isoeng
dc.page.final13
dc.page.initial1
dc.publisherFrontiers Media
dc.relation.projectIDASSEMBLE (227799)
dc.relation.projectIDGDR2821
dc.rightsAtribución 3.0 España
dc.rights.accessRightsopen access
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/es/
dc.subject.cdu597.5
dc.subject.cdu591.18
dc.subject.keywordSea bass
dc.subject.keywordPituitary
dc.subject.keywordHormones
dc.subject.keywordAnnual variations
dc.subject.keywordMelatonin
dc.subject.keywordphotoperiod
dc.subject.keywordSalinity
dc.subject.ucmFisiología animal (Biología)
dc.subject.ucmPeces
dc.subject.unesco2401.13 Fisiología Animal
dc.titlePituitary hormones mRNA abundance in the Mediterranean sea bass Dicentrarchus labrax: seasonal rhythms, effects of melatonin and water salinity
dc.typejournal article
dc.volume.number12
dspace.entity.typePublication
relation.isAuthorOfPublication882d1fb3-a920-418a-9f3f-1b8f6b967032
relation.isAuthorOfPublication48071251-a236-4607-ab33-5332c1472628
relation.isAuthorOfPublication.latestForDiscovery882d1fb3-a920-418a-9f3f-1b8f6b967032
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