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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 (author)
-
- Sjöberg, Trygve (author)
- Lund University,Lunds universitet,Thoraxkirurgi,Sektion II,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Thoracic Surgery,Section II,Department of Clinical Sciences, Lund,Faculty of Medicine
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- Andersson, Karl-Erik (author)
- Lund University,Lunds universitet,Avdelningen för klinisk kemi och farmakologi,Institutionen för laboratoriemedicin,Medicinska fakulteten,Division of Clinical Chemistry and Pharmacology,Department of Laboratory Medicine,Faculty of Medicine
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- 1990
- 1990
- English.
- In: Pharmacology and Toxicology. - 1600-0773. ; 66:2, s. 77-82
- Journal article (peer-reviewed)
Abstract
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- 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.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Kirurgi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Surgery (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Läkemedelskemi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Medicinal Chemistry (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Farmakologi och toxikologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Pharmacology and Toxicology (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Kardiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cardiac and Cardiovascular Systems (hsv//eng)
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