The aim of the present study was to investigate the possibility of different effects of the hydrophobic statin simvastatin and the hydrophilic statin pravastatin on the remodelling process in the overloaded left ventricle and renal cortex of SHRs (spontaneously hypertensive rats). Fifteen SHRs were treated for 40 days with simvastatin, pravastatin or placebo (water) via orogastric administration. Left ventricle and renal cortex were examined by light microscopy and stereology. LV (left ventricular) cardiomyocyte nuclei (N[cmn]) and glomeruli (N[gl]) numbers were estimated by the dissector method. BP (blood pressure) and serum triacylglycerols (triglycerides) were lower in the statin-treated groups than in the untreated control group. The volume density of the interstitial connective tissue was smaller and length density of the intramyocardial arteries, as well as the arteries/cardiomyocyte ratio, was greater in the statin-treated groups than in the control group. No difference was observed between the two statin-treated groups. The cross-sectional cardiomyocyte area was significantly smaller in the simvastatin-treated group than in the control or pravastatin-treated groups, and it was smaller in the pravastatin-treated group than in the control group. N[cmn] and N[gl] were greater in the two statin-treated groups than in the control group, but no significant difference was observed between the two statin-treated groups. In conclusion, administration of the statins simvastatin and pravastatin to SHRs effectively prevented the elevation in BP and serum triaclyglycerols, and also attenuated adverse cardiac and kidney remodelling by preventing LV hypertrophy, enhancing myocardial vascularization with the decrease in interstitial fibrosis and attenuating cardiomyocyte and glomerular loss.
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April 2005
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Research Article|
March 22 2005
Beneficial effect of simvastatin and pravastatin treatment on adverse cardiac remodelling and glomeruli loss in spontaneously hypertensive rats
Daniele G. BEZERRA;
Daniele G. BEZERRA
1Laboratory of Morphometry and Cardiovascular Morphology, Biomedical Centre, Institute of Biology, State University of Rio de Janeiro, Brazil
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Carlos A. MANDARIM-de-LACERDA
1Laboratory of Morphometry and Cardiovascular Morphology, Biomedical Centre, Institute of Biology, State University of Rio de Janeiro, Brazil
Correspondence: Professor Carlos Alberto Mandarim-de-Lacerda (email [email protected]).
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Publisher: Portland Press Ltd
Received:
October 07 2004
Revision Received:
December 06 2004
Accepted:
December 21 2004
Accepted Manuscript online:
December 21 2004
Online ISSN: 1470-8736
Print ISSN: 0143-5221
The Biochemical Society
2005
Clin Sci (Lond) (2005) 108 (4): 349–355.
Article history
Received:
October 07 2004
Revision Received:
December 06 2004
Accepted:
December 21 2004
Accepted Manuscript online:
December 21 2004
Citation
Daniele G. BEZERRA, Carlos A. MANDARIM-de-LACERDA; Beneficial effect of simvastatin and pravastatin treatment on adverse cardiac remodelling and glomeruli loss in spontaneously hypertensive rats. Clin Sci (Lond) 1 April 2005; 108 (4): 349–355. doi: https://doi.org/10.1042/CS20040292
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