Cortisol Inhibition of 17b-Estradiol Secretion by Rainbow Trout Ovarian Follicles Involves Modulation of Star and P450scc Gene Expression
نویسندگان
چکیده
منابع مشابه
Ah Receptor-mediated impairment of interrenal steroidogenesis involves StAR protein and P450scc gene attenuation in rainbow trout.
The objective of the study was to investigate the impact of aryl hydrocarbon receptor (AhR) activation on interrenal steroidogenesis in rainbow trout. To this end, fish were fed AhR agonist (beta-naphthoflavone (BNF): 10 mg/kg body mass/day) and antagonist (alpha-naphthoflavone (ANF): 10 mg/kg body mass/day) either singly or in combination (ABNF) for 5 days to elucidate the mechanisms involved ...
متن کاملComparison of growth parameters, cortisol and muscle gene expression of rainbow trout reared in an open and water reuse system
Fish farming in recirculating aquaculture systems (RAS) has been expanding in the recent years, but the effects of water reuse are not well known. The aim of the present study was to compare the growth parameters, stress response and muscle stress- and growth- related gene expression of rainbow trout (Oncorhynchus mykiss) in open system (OS) versus water reuse system (WRS). For this purpose, yo...
متن کاملChanges in steroidogenic enzyme and steroidogenic acute regulatory protein messenger RNAs in ovarian follicles during ovarian development of rainbow trout (Oncorhynchus mykiss).
In salmonid fishes, estradiol-17beta (E2) and 17alpha,20beta-dihydroxy-4-pregnen-3-one (17,20beta-P) are the major steroid hormones controlling oocyte growth (vitellogenesis) and final maturation (resumption of meiosis). The aim of this study was to determine changes in mRNAs encoding ovarian steroidogenic enzymes and steroidogenic acute regulatory protein (StAR) during ovarian development in f...
متن کاملEffects of Cu on plasma cortisol and cortisol secretion by adrenocortical cells of rainbow trout (Oncorhynchus mykiss).
Fish are exposed to multiple stressors, often acting concurrently, in their environment. To evaluate the potential of Cu to act as a chemical stressor, rainbow trout (Oncorhynchus mykiss) were exposed to Cu (30 or 80 microg/l) for 30 days in the laboratory and they were subjected to a physical stressor (1 min air exposure) before sampling. Physiological stress indicators in the whole fish as we...
متن کاملAutoregulation of glucocorticoid receptor by cortisol in rainbow trout hepatocytes.
We used primary cultures of trout hepatocytes and a physiological dose of cortisol (100 ng/ml), mimicking stressed levels in salmonid fish, to address the impact of glucocorticoid stimulation on glucocorticoid receptor (GR) mRNA abundance and protein content. Cortisol significantly elevated GR mRNA content over a 24-h period; this increase was abolished by actinomycin D, suggesting transcriptio...
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ژورنال
عنوان ژورنال: Journal of Aquaculture Research & Development
سال: 2013
ISSN: 2155-9546
DOI: 10.4172/2155-9546.s2-001