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Effects of alpha-adrenoceptor active drugs, prostaglandin F2 alpha and vasopressin on cystic and hepatic arteries of pig and man

Vagianos, C; Sjöberg, Trygve LU ; Andersson, Karl-Erik LU and Steen, Stig LU (1990) In Pharmacology and Toxicology 66(2). p.77-82
Abstract
Human and pig cystic and pig hepatic arteries were suspended in tissue baths and the effect of alpha-adrenoceptor selective drugs, prostaglandin F2 alpha (PGF2 alpha) and vasopressin were investigated. Prazosin fulfilled the criteria for competitive antagonism in concentrations 10(-9)-10(-7) M. The pA2-values were 9.53 in human cystic, 9.74 in pig cystic, and 9.57 in pig hepatic artery. Rauwolscine had no significant effect in the different arteries. In human cystic artery noradrenaline had significantly (P less than 0.05) higher Emax and pEC50-values (135% of the preceding K(+)-induced contraction and 6.4, respectively) compared with pig cystic (106% and 5.7, respectively) and pig hepatic artery (116% and 5.9, respectively). Vasopressin... (More)
Human and pig cystic and pig hepatic arteries were suspended in tissue baths and the effect of alpha-adrenoceptor selective drugs, prostaglandin F2 alpha (PGF2 alpha) and vasopressin were investigated. Prazosin fulfilled the criteria for competitive antagonism in concentrations 10(-9)-10(-7) M. The pA2-values were 9.53 in human cystic, 9.74 in pig cystic, and 9.57 in pig hepatic artery. Rauwolscine had no significant effect in the different arteries. In human cystic artery noradrenaline had significantly (P less than 0.05) higher Emax and pEC50-values (135% of the preceding K(+)-induced contraction and 6.4, respectively) compared with pig cystic (106% and 5.7, respectively) and pig hepatic artery (116% and 5.9, respectively). Vasopressin had no effect in the cystic arteries, whereas it had a high potency (pEC50 was 8.5) but low intrinsic activity (Emax was 14%) in pig hepatic artery. Prostaglandin F2 alpha had a significantly higher Emax in human than in pig arteries. No differences were found in pEC50-values. This study indicates a similarity in pharmacological characteristics of some vasoactive drugs especially between pig cystic and hepatic arteries. If this is also true in man, the easily obtainable cystic artery can be used for screening the effect of drugs on the hepatic artery. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Pharmacology and Toxicology
volume
66
issue
2
pages
77 - 82
publisher
Wiley-Blackwell
external identifiers
  • pmid:1969153
  • scopus:0025254015
ISSN
1600-0773
language
English
LU publication?
yes
id
a7596274-816f-4c1f-becc-779d28a293b3 (old id 1105521)
date added to LUP
2008-08-05 17:01:07
date last changed
2017-01-01 04:40:24
@article{a7596274-816f-4c1f-becc-779d28a293b3,
  abstract     = {Human and pig cystic and pig hepatic arteries were suspended in tissue baths and the effect of alpha-adrenoceptor selective drugs, prostaglandin F2 alpha (PGF2 alpha) and vasopressin were investigated. Prazosin fulfilled the criteria for competitive antagonism in concentrations 10(-9)-10(-7) M. The pA2-values were 9.53 in human cystic, 9.74 in pig cystic, and 9.57 in pig hepatic artery. Rauwolscine had no significant effect in the different arteries. In human cystic artery noradrenaline had significantly (P less than 0.05) higher Emax and pEC50-values (135% of the preceding K(+)-induced contraction and 6.4, respectively) compared with pig cystic (106% and 5.7, respectively) and pig hepatic artery (116% and 5.9, respectively). Vasopressin had no effect in the cystic arteries, whereas it had a high potency (pEC50 was 8.5) but low intrinsic activity (Emax was 14%) in pig hepatic artery. Prostaglandin F2 alpha had a significantly higher Emax in human than in pig arteries. No differences were found in pEC50-values. This study indicates a similarity in pharmacological characteristics of some vasoactive drugs especially between pig cystic and hepatic arteries. If this is also true in man, the easily obtainable cystic artery can be used for screening the effect of drugs on the hepatic artery.},
  author       = {Vagianos, C and Sjöberg, Trygve and Andersson, Karl-Erik and Steen, Stig},
  issn         = {1600-0773},
  language     = {eng},
  number       = {2},
  pages        = {77--82},
  publisher    = {Wiley-Blackwell},
  series       = {Pharmacology and Toxicology},
  title        = {Effects of alpha-adrenoceptor active drugs, prostaglandin F2 alpha and vasopressin on cystic and hepatic arteries of pig and man},
  volume       = {66},
  year         = {1990},
}