Gene expression of growth hormone family and glucocorticoid receptors, osmosensors, and ion transporters in the gill during seawater acclimation of Mozambique tilapia, Oreochromis mossambicus

Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology
J P BrevesE G Grau

Abstract

This study characterized endocrine and ionoregulatory responses accompanying seawater (SW) acclimation in Mozambique tilapia (Oreochromis mossambicus). Changes in plasma hormones and gene expression of hormone receptors, putative osmosensors, and ion transporters in the gill were measured. Transfer of freshwater (FW)-acclimated tilapia to SW resulted in a marked elevation in plasma osmolality and a significant rise in plasma growth hormone (GH) levels at 12 hr and 14 days after transfer. Significant reductions in plasma prolactin (PRL(177) and PRL(188)) levels also occurred in SW-transferred fish; no effect of transfer upon plasma cortisol or insulin-like growth factor I was observed. Gene expression of GH receptor increased strongly 6 hr after transfer, whereas PRL receptor was lower than controls at 12 hr. By contrast, mRNA levels of somatolactin and glucocorticoid receptors were unaffected by SW transfer. Osmotic stress transcription factor 1 mRNA levels rose significantly between 3 and 12 hr, whereas the calcium-sensing receptor was unaffected. Aquaporin-3 gene expression was strongly down-regulated during SW acclimation from 12 hr until the conclusion of the experiment. Na(+)/K(+)/2Cl(-) cotransporter gene expression incre...Continue Reading

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Citations

Mar 7, 2014·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Jason P BrevesE Gordon Grau
Nov 9, 2010·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Jason P BrevesE Gordon Grau
Apr 2, 2016·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Benjamin P MoormanAndre P Seale
Jan 18, 2014·General and Comparative Endocrinology·Jason P BrevesRolf O Karlstrom
Apr 1, 2014·General and Comparative Endocrinology·Benjamin P MoormanAndre P Seale
Aug 22, 2012·General and Comparative Endocrinology·Darren T LernerStephen D McCormick
Sep 4, 2012·Biochemical and Biophysical Research Communications·Biao YanJin-Liang Zhao
Jul 13, 2016·The Journal of Endocrinology·Jason P BrevesE Gordon Grau
Oct 5, 2017·Journal of Molecular Endocrinology·Jason P BrevesE Gordon Grau
Apr 7, 2011·Physiological Genomics·Nicole L QuinnWilliam S Davidson
Aug 10, 2012·Physiology·Dietmar Kültz
Feb 1, 2013·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Hiroshi MiyanishiYoshio Takei
Sep 18, 2015·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Mayu InokuchiAndre P Seale
Mar 31, 2021·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·Alex M ZimmerChris N Glover
Jan 27, 2015·The Journal of Experimental Biology·Benjamin P MoormanAndre P Seale

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