The effect of indapamide on development of myocardial hypertrophy and fibrosis in L-NAME-induced hypertension in rat

• Published in: Physiological research Vol. 60; no. 6; pp. 845 - 852
• Main Authors: Hlavačková, L, Vranková, S, Janega, P, Pecháňová, O, Babál, P
• Format: Journal Article
• Language: English
• Published: Czech Republic Institute of Physiology 01.01.2011
• Subjects: Animals; Antioxidants; Captopril - pharmacology; Collagen; Collagen Type I - metabolism; Collagen Type III - metabolism; Drinking water; Fibrosis - chemically induced; Fibrosis - metabolism; Heart failure; Hypertension; Hypertension - chemically induced; Hypertension - metabolism; Hypertrophy, Left Ventricular - metabolism; Indapamide - pharmacology; Male; Myocardium - pathology; NG-Nitroarginine Methyl Ester - adverse effects; Polyphenols; Rats; Rats, Wistar; Rodents
• ISSN: 0862-8408; 1802-9973
• DOI: 10.33549/physiolres.932201

The aim of this study was to analyze the effect of indapamide and its combination with ACE inhibitor (captopril) and antioxidant (Provinols™) on both myocardial hypertrophy and fibrosis. Wistar rats were treated with L-NAME (40 mg/kg/day, L); L-NAME plus indapamide (1 mg/kg/day), or captopril (10 mg/kg/day), or Provinols™ (40 mg/kg/day), or combination of indapamide with captopril, and indapamide with Provinols™ for 7 weeks. Blood pressure (BP), LV hypertrophy and fibrosis were determined. The content of collagens type I and III was evaluated morphometrically after picrosirius red staining. L-NAME treatment led to increased BP, LV hypertrophy, total fibrosis and relative content of collagens without the change in collagen type I/III ratio. Indapamide and captopril decreased BP, LV hypertrophy and the collagen ratio without affecting total fibrosis, while Provinols™ reduced BP, the collagen ratio and fibrosis without affecting LV hypertrophy. The combinations decreased all the parameters. Decrease of LV hypertrophy was achieved by drugs with the best reducing effect on BP, fibrosis reduction was reached by the antioxidant treatment with only partial effect on BP. Thus, the combination of antihypertensive and antioxidant treatment may represent a powerful tool in preventing myocardial remodeling induced by hypertension.