Prepubertal treatment with angiotensin receptor blocker causes partial attenuation of hypertension and renal damage in adult Dahl salt-sensitive rats

Hideaki Nakaya, Hiroyuki Sasamura, Mizuo Mifune, Ryoko Shimizu-Hirota, Mari Kuroda, Matsuhiko Hayashi, Takao Saruta

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26 Citations (Scopus)

Abstract

Recently, we have shown that treatment of stroke-prone spontaneously hypertensive rats with angiotensin inhibitors for a limited time-window before puberty results in an attenuation of hypertensive nephrosclerosis in later life. The aim of this study was to examine the applicability of this therapeutic paradigm to a low-renin model. Dahl salt-sensitive (Dahl-S) rats were fed a high-salt diet from age 6 weeks. Some rats were treated with the angiotensin receptor blocker (ARB) candesartan cilexetil (2 mg/kg/d) from weaning to puberty (age 3-10 weeks), whereas other rats were treated continuously until overt renal damage was seen (age 3-16 weeks). Dahl-S rats on a high salt diet had increased blood pressure (207 ± 3 vs. 125 ± B2 mm Hg), proteinuria, and glomerular/vascular histological changes. The prepubertal treatment with ARB resulted in a continued suppression of blood pressure (153 ± 2 mm Hg) at 16 weeks. Both proteinuria and renal histological changes were significantly (p < 0.05) attenuated, but not completely prevented by the treatment. No significant differences in plasma renin activity, renin mRNA, or AT1/AT2 mRNA were seen between groups. These results suggest that prepubertal treatment affords sustained renoprotection, even in an animal model with a suppressed renin-angiotensin system, and support the notion that appropriate prepubertal intervention may lead to a partial attenuation in the susceptibility to inherited renal diseases.

Original languageEnglish
Pages (from-to)710-718
Number of pages9
JournalNephron
Volume91
Issue number4
DOIs
Publication statusPublished - 2002 Aug 31

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Keywords

  • Angiotensin receptor blocker
  • Dahl salt-sensitive rat
  • Nephrosclerosis

ASJC Scopus subject areas

  • Physiology
  • Nephrology
  • Urology
  • Physiology (medical)

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