Expression profiles of genes encoding arginine vasotocin and isotocin receptors and the leucyl-cystinyl aminopeptidase (LNPEP) nonapeptide degradation enzyme in blue tilapia (Oreochromis aureus) during high salinity acclimation
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引用次数: 1
Abstract
ABSTRACT The nonapeptide hormone arginine vasotocin (VT) regulates osmotic balance in fishes by modulating ion and water transport. While VT’s osmoregulatory effects arise in part via changes in VT secretion, it remains uncertain which nonapeptide receptors mediate these effects, or whether adjustments in VT degradation also contribute. This study characterized gene transcript profiles for all known teleost nonapeptide receptors and for the VT and isotocin (IT) degradation enzyme leucyl-cystinyl aminopeptidase (lnpep) in the gill, kidney, and intestine – as well as transcriptional profiles for proVT and proIT mRNAs in hypothalamus and pituitary – of blue tilapia (Oreochromis aureus) during hyperosmotic challenge. Results presented here suggest that VT’s actions during salinity acclimation may be mediated by V1a-type receptor V1a2 in gill and intestine but multiple V2-type receptors in kidney, and provide evidence that lnpep expression is modulated concurrent with osmoregulation, possibly to alter local availability of nonapeptides as osmolality returns to homeostatic set points.
期刊介绍：
Marine and Freshwater Behaviour and Physiology is devoted to the publication of papers covering field and laboratory research into all aspects of the behaviour and physiology of all marine and freshwater animals within the contexts of ecology, evolution and conservation.
As the living resources of the world’s oceans, rivers and lakes are attracting increasing attention as food sources for humans and for their role in global ecology, the journal will also publish the results of research in the areas of fisheries biology and technology where the behaviour and physiology described have clear links to the contexts mentioned above.
The journal will accept for publication Research Articles, Reviews, Rapid Communications and Technical Notes (see Instructions for authors for details). In addition, Editorials, Opinions and Book Reviews (invited and suggested) will also occasionally be published. Suggestions to the Editor-In-Chief for Special Issues are encouraged and will be considered on an ad hoc basis.
With the goal of supporting early career researchers, the journal particularly invites submissions from graduate students and post-doctoral researchers. In addition to recognising the time constraints and logistical limitations their research often faces, and their particular need for a prompt review process, accepted articles by such researchers will be given prominence within the journal (see Instructions for authors for details).
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