ArticleJournal of physiology and biochemistry2002
Blood pressure responsiveness to sympathetic agonists in anaesthetised diabetic rats.
Article in Journal of physiology and biochemistry, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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3 authors at 1 institution in 1 country.
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Abstract
Chronic diabetes alters sympathetic modulation of the cardiovascular system. In the present work, we examined if the cardiovascular system also demonstrates an impaired responsiveness to sympathetic control. The effects of streptozotocin-induced diabetes on pressure responses to noradrenaline or isoproterenol infusion of diabetic rats in vivo are studied. Systolic and diastolic pressures were recorded through a cannula implanted in the right carotid artery. Increasing doses of noradrenaline or isoproterenol were infused through a catheter implanted in the left jugular vein. The dose-response curves for the effects of noradrenaline on blood pressure were altered in streptozotozin-induced diabetic rats. Noradrenaline induced a statistically significant higher increase of both systolic and diastolic pressure in control than in diabetic rats. The maximum depressor response of systolic pressure to isoproterenol was lower in diabetic than in control animals. Diabetes fully abolishes the effect of beta-adrenoceptor stimulation on diastolic blood pressure. The present results demonstrate that streptozotocin-induced diabetes reduces systolic and diastolic arterial pressure, and diminishes the arterial pressure reactivity to sympathetic stimulation.
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