Mineralocorticoid receptors mediate cardiac remodelling in morphine-dependent rats.

Mesripour, Azadeh. and Iyer, Abishek. and Brown, Lindsay. (2012) Mineralocorticoid receptors mediate cardiac remodelling in morphine-dependent rats. Basic & clinical pharmacology & toxicology, 111 (2). pp. 75-80. ISSN 1742-7843


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Acute morphine administration decreases cardiac responses to ischaemic injury. This project has determined whether induction of morphine dependence in rats by gradually increasing morphine doses for 21 days induces structural and functional changes in the cardiovascular system because of mineralocorticoid receptor activation, as morphine increases plasma corticosterone concentrations. Morphine-dependent rats showed ventricular hypertrophy, increased collagen deposition in the left ventricle together with an increased ventricular stiffness and increased plasma malondialdehyde concentrations without changes in systolic blood pressure or thoracic aortic responsiveness. These parameters were attenuated or normalised in morphine-dependent rats treated with spironolactone (50 mg/kg/day) from days 14-21. These results suggest that morphine dependence induces ventricular remodelling and increased oxidative stress that can be prevented by the mineralocorticoid receptor antagonist, spironolactone.

Item Type: Article
Subjects: WG Cardiovascular System
WK Endocrine System
Divisions: Reserach Vice-Chancellar Department > Medical Plants Research Center
Depositing User: Users 1 not found.
Date Deposited: 15 Aug 2017 04:45
Last Modified: 27 Mar 2018 04:45
URI: http://eprints.skums.ac.ir/id/eprint/2960

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