scholarly journals Lack of V1 vasopressin receptors in rabbit hepatocytes

1989 ◽  
Vol 259 (2) ◽  
pp. 609-611 ◽  
Author(s):  
A Vandekerckhove ◽  
F Miot ◽  
S Keppens ◽  
H De Wulf

Vasopressin does not induce glycogenolysis in rabbit hepatocytes; glucagon, angiotensin, phenylephrine and ATP are as potent as with rat hepatocytes, whereas isoprenaline is nearly 10000 times more potent in the rabbit. Binding studies of [3H]vasopressin reveal the complete absence of specific vasopressin receptors on rabbit liver plasma membranes. We verified that vasopressin acts as an antidiuretic and vasopressor agent in the rabbit. We conclude that there is a selective lack of V1 vasopressin receptors in rabbit liver.

Enzyme ◽  
1982 ◽  
Vol 28 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Jacques Magdalou ◽  
Bénédicte Antoine ◽  
Damrong Ratanasavanh ◽  
Gérard Siest

1981 ◽  
Vol 13 (09) ◽  
pp. 510-515 ◽  
Author(s):  
J. Fix ◽  
Paula Leppert ◽  
W. Moore

1983 ◽  
Vol 216 (2) ◽  
pp. 475-480 ◽  
Author(s):  
F Assimacopoulos-Jeannet ◽  
B Cantau ◽  
G van de Werve ◽  
S Jard ◽  
B Jeanrenaud

The activity of phosphorylase a was measured in isolated hepatocytes from fed lean and ob/ob mice after addition of vasopressin, angiotensin, phenylephrine and glucagon. The binding of these hormones to purified liver plasma membranes was also determined. In hepatocytes of ob/ob mice, no increase in phosphorylase a was measured after addition of vasopressin, whereas the other hormones promoted an increase in the activity of the enzyme. No specific vasopressin receptors could be measured on purified liver plasma membrane of ob/ob mice. A decrease in the number of receptors for angiotensin and glucagon, without modification of the affinity, was also observed. No restoration of the number of vasopressin receptors was observed in liver of ob/ob mice starved for 3 days or in younger (5-6 weeks) animals. Vasopressin receptors and vasopressin-stimulated adenylate cyclase, measured on purified kidney medulla membranes, were similar in both lean and ob/ob mice. The data indicate a selective lack of vasopressin receptors and metabolic response in liver of the ob/ob mouse.


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