urotensin-i and isotocin

urotensin-i has been researched along with isotocin* in 2 studies

Other Studies

2 other study(ies) available for urotensin-i and isotocin

Article	Year
In vitro effect of cortisol and urotensin I on arginine vasotocin and isotocin secretion from pituitary cells of gilthead sea bream Sparus aurata. Journal of fish biology, 2014, Volume: 84, Issue:2 This study aimed at determining whether in vitro secretion of two neuropeptides, arginine vasotocin (AVT) and isotocin (IT), from pituitary cells of gilthead sea bream Sparus aurata was affected by cortisol and urotensin (UI). Pituitary cells were exposed to 1·4 × 10(-8) , 1·4 × 10(-7) and 0·4 × 10(-6) M cortisol and 10(-12) , 10(-10) and 10(-8) M UI for 6, 24 and 48 h, respectively. AVT and IT contents were determined in the culture media by high-performance liquid chromatography (HPLC). An increase in AVT secretion and a decrease in IT secretion were observed at all cortisol doses. UI increased AVT secretion after 6 h of incubation at all doses. After 24 h, however, only the highest dose of UI still displayed an effect. IT secretion was not influenced by UI. It was thus demonstrated that cortisol does influence AVT and IT secretion from S. aurata pituitary cells, while UI regulates AVT secretion, as a component of hypothalamic-pituitary-interrenal (HPI) axis in this species. Topics: Animals; Cells, Cultured; Chromatography, High Pressure Liquid; Female; Hydrocortisone; Male; Oxytocin; Pituitary Gland; Sea Bream; Urotensins; Vasotocin	2014
ACTH-releasing activity of urotensin I and ovine CRF: interactions with arginine vasotocin, isotocin and arginine vasopressin. Regulatory peptides, 1985, Volume: 11, Issue:1 The release of ACTH from superfused dispersed goldfish anterior pituitary cells was examined to determine if the neurohypophyseal peptides arginine vasotocin (AVT), isotocin (IST) or arginine vasopressin (AVP) potentiate the ACTH-releasing activities of the structurally homologous peptides urotensin I (UI) or ovine corticotropin-releasing factor (CRF). The ACTH-releasing activities of the neurohypophyseal peptides and UI or CRF were additive. AVT, IST or AVP failed to potentiate the ACTH-releasing activity of UI or CRF. These results suggest that in teleost fishes neurohypophyseal peptides have intrinsic ACTH-releasing activity but, unlike mammals, do not potentiate the release of ACTH evoked by CRF, or by the piscian CRF-like peptide, UI. Topics: Adrenocorticotropic Hormone; Animals; Arginine Vasopressin; Corticotropin-Releasing Hormone; Goldfish; Mammals; Oxytocin; Peptides; Pituitary Gland, Anterior; Sheep; Species Specificity; Urotensins; Vasotocin	1985

Article

Year

In vitro effect of cortisol and urotensin I on arginine vasotocin and isotocin secretion from pituitary cells of gilthead sea bream Sparus aurata.

Journal of fish biology, 2014, Volume: 84, Issue:2

This study aimed at determining whether in vitro secretion of two neuropeptides, arginine vasotocin (AVT) and isotocin (IT), from pituitary cells of gilthead sea bream Sparus aurata was affected by cortisol and urotensin (UI). Pituitary cells were exposed to 1·4 × 10(-8) , 1·4 × 10(-7) and 0·4 × 10(-6) M cortisol and 10(-12) , 10(-10) and 10(-8) M UI for 6, 24 and 48 h, respectively. AVT and IT contents were determined in the culture media by high-performance liquid chromatography (HPLC). An increase in AVT secretion and a decrease in IT secretion were observed at all cortisol doses. UI increased AVT secretion after 6 h of incubation at all doses. After 24 h, however, only the highest dose of UI still displayed an effect. IT secretion was not influenced by UI. It was thus demonstrated that cortisol does influence AVT and IT secretion from S. aurata pituitary cells, while UI regulates AVT secretion, as a component of hypothalamic-pituitary-interrenal (HPI) axis in this species.

Topics: Animals; Cells, Cultured; Chromatography, High Pressure Liquid; Female; Hydrocortisone; Male; Oxytocin; Pituitary Gland; Sea Bream; Urotensins; Vasotocin

2014

ACTH-releasing activity of urotensin I and ovine CRF: interactions with arginine vasotocin, isotocin and arginine vasopressin.

Regulatory peptides, 1985, Volume: 11, Issue:1

The release of ACTH from superfused dispersed goldfish anterior pituitary cells was examined to determine if the neurohypophyseal peptides arginine vasotocin (AVT), isotocin (IST) or arginine vasopressin (AVP) potentiate the ACTH-releasing activities of the structurally homologous peptides urotensin I (UI) or ovine corticotropin-releasing factor (CRF). The ACTH-releasing activities of the neurohypophyseal peptides and UI or CRF were additive. AVT, IST or AVP failed to potentiate the ACTH-releasing activity of UI or CRF. These results suggest that in teleost fishes neurohypophyseal peptides have intrinsic ACTH-releasing activity but, unlike mammals, do not potentiate the release of ACTH evoked by CRF, or by the piscian CRF-like peptide, UI.

Topics: Adrenocorticotropic Hormone; Animals; Arginine Vasopressin; Corticotropin-Releasing Hormone; Goldfish; Mammals; Oxytocin; Peptides; Pituitary Gland, Anterior; Sheep; Species Specificity; Urotensins; Vasotocin

1985