Radioimmunoassay of arginine vasotocin and mesotocin in serum of the frog Rana ridibunda

1983 ◽  
Vol 50 (2) ◽  
pp. 242-251 ◽  
Author(s):  
E.J. Nouwen ◽  
E.R. Kuhn
Keyword(s):  
Arginine Vasotocin ◽  
Rana Ridibunda

Volumetric control of arginine vasotocin and mesotocin release in the frog (Rana ridibunda)

1985 ◽  
Vol 105 (3) ◽  
pp. 371-377 ◽  
Author(s):  
E. J. Nouwen ◽  
E. R. Kühn
Keyword(s):  
Plasma Levels ◽  
Plasma Concentrations ◽  
Control Level ◽  
Urine Osmolality ◽  
Ringer Solution ◽  
Urine Flow ◽  
Arginine Vasotocin ◽  
Rana Ridibunda ◽  
And Control ◽  
Control Plasma

ABSTRACT Adult male frogs (Rana ridibunda) were subjected to several volumetric and osmometric stimuli and the influence on circulating concentrations of arginine vasotocin (AVT) and mesotocin was studied by the use of highly specific radioimmunoassays. During progressive blood withdrawal (haemorrhage group) urine flow decreased to zero, whereas no change occurred in the plasma and urine osmolality. Control levels of 34·3±7·3 pmol AVT/1 gradually increased up to 638·3±179·1 pmol/l (P<0·001) after a blood loss of up to 50–60% of the blood volume. Plasma mesotocin concentrations also increased from 42·4±9·2 to 70·8±12·0 pmol/l (n = 7). Hypervolaemia, produced by the repeated intravenous injection of isotonic Ringer solution, increased the urine flow and osmolality compared to controls but had no influence on the plasma levels of AVT and mesotocin. Hypernatraemia without volume change profoundly increased the urine osmolality but the urine flow was not affected; the plasma concentrations of AVT and mesotocin remained at the control level. Finally, during a 1-h immobilization stress a pronounced antidiuresis occurred in the presence of a constant plasma and urine osmolality and control plasma levels of AVT and mesotocin. It is concluded that the release of AVT and, to a smaller extent, of mesotocin is under volumetric control. J. Endocr. (1985) 105, 371–377

Gender-Specific Expression of Arginine-Vasotocin in the Chicken Brain

2004 ◽  
Vol 15 (3) ◽  
pp. 219-223 ◽  
Author(s):  
R. Grossmann ◽  
A. Jurkevich ◽  
S. Klein
Keyword(s):  
Arginine Vasotocin ◽  
Specific Expression ◽  
Chicken Brain ◽  
Gender Specific

Water-Orientation Behavior in the Terrestrial Gastropod Limax maximus: The Effects of Dehydration and Arginine Vasotocin

1990 ◽  
Vol 63 (4) ◽  
pp. 683-696 ◽  
Author(s):  
Pamela A. Banta ◽  
Ian G. Welsford ◽  
David J. Prior
Keyword(s):  
Arginine Vasotocin ◽  
Orientation Behavior ◽  
Limax Maximus ◽  
Terrestrial Gastropod
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