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Maternal high-sodium intake alters the responsiveness of the renin-angiotensin system in adult offspring.

Abstract：

AIMS:The goal of the current study was to evaluate the impact of maternal sodium intake during gestation on the systemic and renal renin-angiotensin-aldosterone-system (RAAS) of the adult offspring. MAIN METHODS:Female Wistar rats were fed high- (HSD-8.0% NaCl) or normal-sodium diets (NSD-1.3% NaCl) from 8 weeks of age until the delivery of their first litter. After birth, the offspring received NSD. Tail-cuff blood pressure (TcBP) was measured in the offspring between 6 and 12 weeks of age. At 12 weeks of age, the offspring were subjected to either one week of HSD or low sodium diet (LSD-0.16% NaCl) feeding to evaluate RAAS responsiveness or to acute saline overload to examine sodium excretory function. Plasma (PRA) and renal renin content (RRC), serum aldosterone (ALDO) levels, and renal cortical and medullary renin mRNA expression levels were evaluated at the end of the study. KEY FINDINGS:TcBP was higher among dams fed HSD, but no TcBP differences were observed among the offspring. Male offspring, however, exhibited increased TcBP after one week of HSD feeding, and this effect was independent of maternal diet. Increased RAAS responsiveness to the HSD and LSD was also observed in male offspring. The baseline levels of PRA, ALDO, and cortical and medullary renin gene expression were lower but the RRC levels were higher among HSD-fed male offspring (HSDoff). Conversely, female HSDoff showed reduced sodium excretion 4 h after saline overload compared with female NSDoff. SIGNIFICANCE:High maternal sodium intake is associated with gender-specific changes in RAAS responsiveness among adult offspring.

journal_name

Life Sci

journal_title

Life sciences

authors

Ramos DR,Costa NL,Jang KL,Oliveira IB,da Silva AA,Heimann JC,Furukawa LN

doi

10.1016/j.lfs.2012.04.011

subject

Has Abstract

pub_date

2012-05-22 00:00:00

pages

785-92

issue

19-20

eissn

0024-3205

issn

1879-0631

pii

S0024-3205(12)00186-5

journal_volume

90

pub_type

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