Spironolactone differently influences remodeling of the left ventricle and aorta in L-NAME-induced hypertension
| Autor: | Ivan Luptak, Stvrtina S, Fedor Simko, Pomsár J, Olga Pechanova, Pelouch, Ludovit Paulis, Pincíková T, J. Matuskova, Kristina Krajcirovicova |
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| Rok vydání: | 2007 |
| Předmět: |
DNA Replication
Male medicine.medical_specialty Time Factors Physiology Heart Ventricles Blood Pressure Spironolactone Left ventricular hypertrophy Kidney Nitric Oxide Muscle hypertrophy Nitric oxide chemistry.chemical_compound medicine.artery Internal medicine medicine Animals Rats Wistar Antihypertensive Agents Aorta Cell Proliferation Mineralocorticoid Receptor Antagonists Ventricular Remodeling business.industry Aldosterone Receptor Antagonist General Medicine medicine.disease Rats Endocrinology medicine.anatomical_structure NG-Nitroarginine Methyl Ester chemistry Ventricle Hypertension Cardiology Hypertrophy Left Ventricular Nitric Oxide Synthase business |
| Zdroj: | Scopus-Elsevier Europe PubMed Central |
| ISSN: | 0862-8408 |
| Popis: | Aldosterone receptor antagonist, spironolactone, has been shown to prevent remodeling of the heart in several models of left ventricular hypertrophy. The aim of the present study was to determine whether the treatment with spironolactone can prevent hypertension, reduction of tissue nitric oxide synthase activity and left ventricular (LV) and aortic remodeling in N(G)-nitro-L-arginine methyl ester (L-NAME)-induced hypertension. Four groups of rats were investigated: control, spironolactone (200 mg/kg), L-NAME (40 mg/kg) and L-NAME + spironolactone (in corresponding dosage). Animals were studied after 5 weeks of treatment. The decrease of NO-synthase activity in the LV and kidney was associated with the development of hypertension and LV hypertrophy, with increased DNA concentration in the LV, and remodeling of the aorta in the L-NAME group. Spironolactone prevented the inhibition of NO-synthase activity in the LV and kidney and partially attenuated hypertension and LVH development and the increase in DNA concentration. However, remodeling of the aorta was not prevented by spironolactone treatment. We conclude that the aldosterone receptor antagonist spironolactone improved nitric oxide production and partially prevented hypertension and LVH development without preventing hypertrophy of the aorta in NO-deficient hypertension. The reactive growth of the heart and aorta seems to be controlled by different mechanisms in L-NAME-induced hypertension. |
| Databáze: | OpenAIRE |
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