| Haemodynamic effects of the intravenous administration of growth hormone in anaesthetized pigs. | |
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MedLine Citation:
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PMID: 9594014 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Administration of growth hormone in humans has been reported variably to affect arterial blood pressure and ventricular contractility. The present study was undertaken in anaesthetized pigs to establish whether increases in the blood levels of growth hormone primarily affect haemodynamic variables and to determine the mechanisms involved. In pigs anaesthetized with pentobarbitone sodium, left circumflex or anterior descending coronary blood flow was measured with an electromagnetic flowmeter. In a first group of 23 pigs, growth hormone administration (0.05 IU kg-1 i.v.) increased aortic blood pressure and reduced coronary blood flow when heart rate and aortic blood pressure were held constant. These responses were augmented by graded increases in plasma levels of growth hormone. The mechanisms of the above responses were studied in a second group of 29 pigs and involved beta2-adrenergic receptors since they were abolished by propranolol or butoxamine but not by atropine, phentolamine or atenolol. The present study showed that administration of growth hormone in anaesthetized pigs primarily increased aortic blood pressure and vasoconstricted the coronary circulation. The mechanisms of these responses involved beta2-adrenoceptor effects. |
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Authors:
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G Vacca; A Battaglia; E Chiorboli; E Grossini; D A Mary; C Molinari; G Bona |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Pflügers Archiv : European journal of physiology Volume: 436 ISSN: 0031-6768 ISO Abbreviation: Pflugers Arch. Publication Date: 1998 Jul |
Date Detail:
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Created Date: 1998-07-17 Completed Date: 1998-07-17 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0154720 Medline TA: Pflugers Arch Country: GERMANY |
Other Details:
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Languages: eng Pagination: 159-67 Citation Subset: IM |
Affiliation:
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Dipartimento di Scienze Mediche, Facoltà di Medicina e Chirurgia di Novara, Università di Torino, via Solaroli 17, I-28100 Novara, Italy. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adjuvants, Anesthesia Adrenergic beta-Antagonists / pharmacology Anesthesia Animals Aorta / physiology Blood Pressure Butoxamine / pharmacology Coronary Circulation Heart Rate Hemodynamics* Human Growth Hormone / administration & dosage, blood, pharmacology* Humans Kinetics Pentobarbital Propranolol / pharmacology Receptors, Adrenergic, beta / physiology Swine Vasoconstriction |
| Chemical | |
Reg. No./Substance:
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0/Adjuvants, Anesthesia; 0/Adrenergic beta-Antagonists; 0/Receptors, Adrenergic, beta; 12629-01-5/Human Growth Hormone; 2922-20-5/Butoxamine; 525-66-6/Propranolol; 76-74-4/Pentobarbital |
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