Document Detail


Prostaglandin synthesis blockade by ketoprofen attenuates respiratory and cardiovascular responses to static handgrip.
MedLine Citation:
PMID:  7759412     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We investigated the effects of prostaglandin synthesis blockade on the changes in breathing pattern, mean blood pressure (MBP), and heart rate (HR) elicited by 3 min of static handgrip at 30% of the maximum voluntary contraction in 12 healthy volunteers. Before each handgrip trial, subjects were treated with intravenous administration of either saline placebo (control) or 1 mg/kg of ketoprofen. Muscle tension and integrated electromyographic activity of exercising muscles remained fairly constant during each trial. In agreement with our earlier findings, during control handgrip minute ventilation progressively increased (P < 0.01) due to a rise in tidal volume and, to a lesser extent, in respiratory frequency. Mean inspiratory flow, MBP, and HR also increased (P < 0.01). End-tidal PCO2 decreased (P < 0.05) during the late phases of control handgrip bouts. Ketoprofen administration reduced serum thromboxane B2 levels (from 57.5 +/- 7.0 to 1.6 +/- 0.4 pg/ml; P < 0.01) and significantly attenuated mean increases in minute ventilation (40.25 +/- 0.60%), tidal volume (37.78 +/- 7.48%), respiratory frequency (55.94 +/- 17.92%), inspiratory flow (42.66 +/- 5.11%), MBP (22.33 +/- 6.82%), and HR (11.04 +/- 2.75%) during the 3rd min of handgrip. End-tidal PCO2 remained close to normocapnic levels. In agreement with previous animal investigations, the present results show that arachidonic acid metabolites are involved in the regulation of the cardiovascular responses to static efforts in humans, possibly through a stimulatory action on muscle receptors. Furthermore, they provide the first experimental evidence that products of the cyclooxygenase metabolic pathway play a role in the mediation of the respiratory adjustments elicited by this form of exercise.
Authors:
G A Fontana; T Pantaleo; F Bongianni; F Cresci; F Lavorini; C T Guerra; P Panuccio
Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  78     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  1995 Feb 
Date Detail:
Created Date:  1995-06-29     Completed Date:  1995-06-29     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  449-57     Citation Subset:  IM; S    
Affiliation:
Dipartimento di Fisiopatologia Clinica, Università di Firenze, Italy.
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MeSH Terms
Descriptor/Qualifier:
Adult
Blood Pressure / drug effects
Carbon Dioxide / metabolism
Cyclooxygenase Inhibitors / pharmacology
Electromyography
Hand / physiology
Heart Rate / drug effects
Hemodynamics / drug effects*
Humans
Ketoprofen / pharmacology*
Male
Physical Exertion / physiology*
Prostaglandins / biosynthesis*
Respiratory Mechanics / drug effects*
Chemical
Reg. No./Substance:
0/Cyclooxygenase Inhibitors; 0/Prostaglandins; 124-38-9/Carbon Dioxide; 22071-15-4/Ketoprofen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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