Protein restriction during pregnancy induces hypertension and impairs endothelium-dependent vascular function in adult female offspring

Kunju Sathishkumar, Rebekah Elkins, Uma Yallampalli, Chandra Yallampalli

Research output: Contribution to journalArticle

45 Scopus citations

Abstract

Intrauterine undernutrition plays a role in the development of adult hypertension. Most studies are done in male offspring to delineate the mechanisms whereby blood pressure may be raised; however, the vascular mechanisms involved in female offspring are unclear. Female offspring of pregnant Sprague-Dawley rats fed either a control (C; 18%) or a low-protein (LP; 6%) diet during pregnancy were used. Birth weight and later growth were markedly lower in LP than in C offspring. LP offspring exhibited impaired estrous cyclicity with increased mean arterial pressure. Hypotensive response to acetylcholine (ACh) and the hypertensive response to phenylephrine (PE) were greater in LP than in C rats. N-nitro-L-arginine methyl ester (L-NAME) induced greater hypertensive responses in C than in LP rats. Endothelium-intact mesenteric arteries from LP offspring exhibited increased contractile responses to PE and reduced vasodilation in response to ACh. In endothelium-denuded arteries, relaxation responses to sodium nitroprusside were similar in both groups. Basal and ACh-induced increase in vascular nitrite/nitrate production was lower in LP than in C offspring. L-NAME or 1H-1,2,4-oxadiazolo-4,3- quinoxalin-1-one inhibited ACh relaxations and enhanced PE contractions in C offspring, but had minimal effect in LP rats. The decreasedNO-mediated vascular response might explainthe increased vascular contraction and arterial pressure infemale offspring with low birth weight.

Original languageEnglish (US)
Pages (from-to)229-239
Number of pages11
JournalJournal of Vascular Research
Volume46
Issue number3
DOIs
StatePublished - Apr 1 2009

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Keywords

  • Constriction
  • Endothelium
  • Fetal programming
  • Hypertension
  • Mean arterial blood pressure
  • Nitric oxide
  • Pregnancy
  • Relaxation
  • Vascular smooth muscle

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine

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