Postnatal development of arterial pressure

Influence of the intrauterine environment

Samantha Louey, M. L. Cock, R. Harding

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

A substantial number of epidemiological studies have shown that small size at birth is associated with an increased risk of developing hypertension and metabolic dysfunction later in life; however these associations have not been found in all studies. In animals, several models have been used to investigate the effects of perturbations to the fetal environment on later arterial pressure, with differing effects on size at birth and arterial pressure. Ovine models include maternal dietary manipulations, antenatal glucocorticoid exposure, and restriction of placental size and function. In our laboratory, we have induced late gestational placental insufficiency and growth restriction in sheep by umbilico-placental embolisation; during the early postnatal period the growth restricted lambs remained small and were hypotensive relative to controls. More recent long-term studies indicate that these growth restricted animals were able to catch up in body weight within the first postnatal year; however, their arterial pressure remained lower than that of controls throughout the first 2 postnatal years (AMAP, -4.2 ± 1.4 mmHg). This relative hypotension may be due to altered vascular or cardiac development resulting from increased vascular resistance or nutrient restriction during fetal life. As late gestational placental insufficiency led to a persistent reduction in arterial pressure from birth to adulthood, our findings do not support the hypothesis that restricted fetal growth per se leads to hypertension after birth. It is likely that the effects of a prenatal compromise on postnatal arterial pressure will vary depending on the nature of the associated developmental perturbations and their gestational timing.

Original languageEnglish (US)
Pages (from-to)53-60
Number of pages8
JournalArchives of Physiology and Biochemistry
Volume111
Issue number1
DOIs
StatePublished - Feb 2003
Externally publishedYes

Fingerprint

Arterial Pressure
Parturition
Placental Insufficiency
Sheep
Animals
Growth
Hypertension
Fetal Development
Vascular Resistance
Hypotension
Glucocorticoids
Nutrients
Blood Vessels
Epidemiologic Studies
Animal Models
Body Weight
Mothers
Food

Keywords

  • Birth weight
  • Blood pressure
  • Fetal growth retardation
  • Placental insufficiency

ASJC Scopus subject areas

  • Physiology
  • Biochemistry

Cite this

Postnatal development of arterial pressure : Influence of the intrauterine environment. / Louey, Samantha; Cock, M. L.; Harding, R.

In: Archives of Physiology and Biochemistry, Vol. 111, No. 1, 02.2003, p. 53-60.

Research output: Contribution to journalArticle

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