Eplerenone inhibits aldosterone-induced renal expression of cyclooxygenase
Autor: | Deborah Lyn, Danita Eatman, J Adiyiah, Aisha Rollins-Hairston, Mohamed A. Bayorh |
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Jazyk: | angličtina |
Rok vydání: | 2012 |
Předmět: |
Male
medicine.medical_specialty endocrine system Medicine (General) Systole Blotting Western Blood Pressure Spironolactone Kidney Article Dinoprostone chemistry.chemical_compound Endocrinology R5-920 Heart Rate Internal medicine Internal Medicine medicine Animals Vasoconstrictor Agents Salt intake Prostaglandin E2 Aldosterone Rats Inbred Dahl biology Acetophenones Membrane Proteins Epoprostenol Immunohistochemistry Eplerenone Rats medicine.anatomical_structure chemistry Cyclooxygenase 2 Apocynin Cyclooxygenase 1 biology.protein Cyclooxygenase medicine.drug |
Zdroj: | Journal of the Renin-Angiotensin-Aldosterone System, Vol 13 (2012) |
ISSN: | 1752-8976 1470-3203 |
Popis: | Introduction: The upregulation of cyclooxygenase (COX) expression by aldosterone (ALDO) or high salt diet intake is very interesting and complex in the light of what is known about the role of COX in renal function. Thus, in this study, we hypothesize that apocynin (APC) and/or eplerenone (EPL) inhibit ALDO/salt-induced kidney damage by preventing the production of prostaglandin E2 (PGE2). Methods: Dahl salt-sensitive rats on either a low-salt or high-salt diet were treated with ALDO (0.2 mg pellet) in the presence of EPL (100 mg/kg/day) or APC (1.5 mM). Indirect blood pressure, prostaglandins and ALDO levels and histological changes were measured. Results: Cyclooxygenase-2 (COX-2) levels were upregulated in the renal tubules and peritubular vessels after high-salt intake, and APC attenuated renal tubular COX-2 protein expression induced by ALDO. Plasma PGE2 levels were significantly reduced by ALDO in the rats fed a low-salt diet when compared to rats fed a high-salt diet. PGE2 was blocked by EPL but increased in the presence of APC. Conclusions: The beneficial effects of EPL may be associated with an inhibition of PGE2. The mechanism underlying the protective effects of EPL is clearly distinct from that of APC and suggests that these agents can have differential roles in cardiovascular disease. |
Databáze: | OpenAIRE |
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