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Titolo:
Pituitary and interrenal function in gilthead sea bream (Sparus aurata L.,Teleostei) after handling and confinement stress
Autore:
Rotllant, J; Balm, PHM; Perez-Sanchez, J; Wendelaar-Bonga, SE; Tort, L;
Indirizzi:
Univ Autonoma Barcelona, Dept Physiol & Cell Biol, E-08193 Bellaterra, Spain Univ Autonoma Barcelona Bellaterra Spain E-08193 08193 Bellaterra, Spain Univ Nijmegen, Fac Sci, Dept Anim Physiol, Nijmegen, Netherlands Univ Nijmegen Nijmegen Netherlands Anim Physiol, Nijmegen, Netherlands CSIC, Inst Acuicultura Torre Sal, Ribera De Cabanes, Castellon, Spain CSIC Ribera De Cabanes Castellon Spain bera De Cabanes, Castellon, Spain
Titolo Testata:
GENERAL AND COMPARATIVE ENDOCRINOLOGY
fascicolo: 3, volume: 121, anno: 2001,
pagine: 333 - 342
SICI:
0016-6480(200103)121:3<333:PAIFIG>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORTICOTROPIN-RELEASING FACTOR; TROUT ONCORHYNCHUS-MYKISS; TILAPIA OREOCHROMIS-MOSSAMBICUS; MELANOCYTE-STIMULATING HORMONE; GROWTH-HORMONE; RAINBOW-TROUT; CATOSTOMUS-COMMERSONI; PHYSIOLOGICAL-RESPONSES; CROWDING STRESS; ALPHA-MSH;
Keywords:
cortisol; adrenocorticotropin; alpha melanocyte-stimulating hormone; N-acetylated beta-endorphin; growth hormone; corticotropin-releasing hormone; alpha-helical corticotropin-releasing hormone (9-41); head kidney; pituitary stress; gilthead sea bream;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Rotllant, J Univ Autonoma Barcelona, Fac Ciencies, Dept Biol Celular & Fisiol, Unitat Fisiol Anim, E-08193 Barcelona, Spain Univ Autonoma Barcelona Barcelona Spain E-08193 elona, Spain
Citazione:
J. Rotllant et al., "Pituitary and interrenal function in gilthead sea bream (Sparus aurata L.,Teleostei) after handling and confinement stress", GEN C ENDOC, 121(3), 2001, pp. 333-342

Abstract

Dynamics of adrenocorticotropin (ACTH), cu melanocytestimulating hormone (alpha -MSH), N-acetylated-beta -endorphin (N-ac-beta -END), cortisol, and growth hormone (GH) were investigated in gilthead sea bream (Sparus aurata) stressed by handling plus confinement. As indices of the secondary stress response, plasma levels of glucose, lactate, and plasma ions were monitored. Within 1 h, plasma cortisol and ACTH levels increased above the control values but GH levels decreased. Subsequently, at 24 h cortisol and ACTH levels had declined, bur were still higher than in controls, whereas GH levels had recovered after 4 h. Regarding the melanotrope peptides, there were no differences in plasma levels of cu-MSH and N-ac-beta -END, but pituitary stores of these peptides were severely depleted already after 1 h, as were ACTH stores. Pituitary contents of proopiomelanocortin (POMC)-derived hormonesdid not show significant differences from 72 h onward. Therefore, the results indicate that both handling and confinement affected the corticotropes of the pars distalis and the melanotropes of the neurointermediate lobe butat different magnitudes. The possible involvement of corticotropin-releasing hormone (CRH) in the regulation of pituitary POMC-producing cell types under these conditions was indicated by the in vitro dose-dependent effect of the peptide on release of ACTH, cu-MSH, and N-ac-beta -END. The corticocotropes appeared more responsive, and approximately 10-fold more sensitive, to CRH compared with the melanotropes. The ACTH-releasing potency of 1 nM CRH was inhibited 75% following pretreatment of the whole pituitary gland with 400 nM of the CRH antagonist cw-helical CRH9-41. (C) 2001 Academic Press.

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Documento generato il 25/11/20 alle ore 03:47:56