Journal ArticleDOI
Evidence for the presence of arginine vasotocin (8-arginine oxytocin) and oxytocin in neurohypophyseal extracts from amphibians and reptiles.
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TLDR
Pharmacological evidence indicates that oxytocin is present also in frog, toad, and turtle extracts, quite possibly present in the neurohypophyses of all nonmammalian vertebrates except elasmobranchs.About:
This article is published in General and Comparative Endocrinology.The article was published on 1961-04-01. It has received 37 citations till now. The article focuses on the topics: Vasotocin & Toad.read more
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Journal ArticleDOI
Endocrine aspects of gestation in viviparous reptiles
TL;DR: In the reptilian ovary, steroid-converting enzymes are demonstrable in the granulosa and theca interna cells, and it is suggested that the modifications which occur in the uterine mucosa during pregnancy are induced by local agents released from the fetal components of the placenta.
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The neurohypophysial hormones of lungfishes and amphibians
B. K. Follett,H. Heller +1 more
TL;DR: Follett & Heller (1964) found that representatives of the three major groups of the Actinopterygii elaborate 8-arginine oxytocin (vasotocin), and investigated the neurohypophysial hormones of other species of the Amphibia including those of Urodela which have, so far, been analysed.
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The stimulus for the water-balance response to dehydration in toads
TL;DR: Changes in rates of water exchange similar to those caused by dehydration (enhanced cutaneous uptake and reduced urinary loss) are elicited by injection of hyperosmotic solutions of NaCl or sucrose.
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Osmoregulation and pituitary--adrenal function in desert reptiles.
TL;DR: In the present communication, mention will be made of recently published material on the hormonal control of water and electrolyte physiology in reptiles and new information will be presented from unpublished laboratory and field investigations on Australian lizards.
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Journal ArticleDOI
The effects of neurohypophysial extracts on the water transfer across the wall of the isolated urinary bladder of the toad Bufo marinus.
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Effect of magnesium ion on the response of the rat uterus to neurohypophysial hormones and analogues1
TL;DR: Absolute oxytocic potencies of highly purified neurohypophysial hormones and analogues were determined on isolated rat uteri suspended in van Dyke-Hastings solution, but there was considerable variation between substances in the degree to which this potentiation occurred.
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Avian neurohypophysial hormones: pharmacological properties and tentative identification
TL;DR: Paper chromatographic and enzymatic studies, together with the demonstration of inactivation by thioglycollatc, furnish additional evidence suggesting that oxytocin and arginine vasotocin may be neurohypophysial hormones in the chicken, Gallus domesticus.
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The effect of neurohypophyseal hormones on the permeability of the toad bladder to urea
TL;DR: The toad bladder is used as a model for the studies reported below, a tissue that resembles the mammalian renal tubule in several respects and in which the movement of urea across living cells could be measured directly.
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Arginine-Vasotocin, a Synthetic Analogue of the Posterior Pituitary Hormones Containing the Ring of Oxytocin and the Side Chain of Vasopressin
TL;DR: The evidence is convincing at the present time for the occurrence in nature of arginine-vasotocin, and a remarkable example of the synthesis of a polypeptide hormone before its identification as a natural product is represented.