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Postnatal early overnutrition dysregulates the intrarenal renin-angiotensin system and extracellular matrix-linked molecules in juvenile male rats

Authors
Yim, Hyung EunHa, Kee SooBae, In SunYoo, Kee HwanHong, Young SookLee, Joo Won
Issue Date
8월-2012
Publisher
ELSEVIER SCIENCE INC
Keywords
Extracellular matrix; Kidney development; Obesity; Renin-angiotensin system
Citation
JOURNAL OF NUTRITIONAL BIOCHEMISTRY, v.23, no.8, pp.937 - 945
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF NUTRITIONAL BIOCHEMISTRY
Volume
23
Number
8
Start Page
937
End Page
945
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/107798
DOI
10.1016/j.jnutbio.2011.04.020
ISSN
0955-2863
Abstract
Overnutrition during the perinatal period has been associated with susceptibility to obesity and related comorbidities. We examined the effects of postnatal early overnutrition on the development of juvenile obesity and the associated renal pathophysiological changes. Three or 10 pups per mother from rat pup litters were assigned to either the overnutrition or control groups during the first 21 days of life. The effects of overfeeding were measured at 28 days. The smaller male litter pups were heavier than the controls between 4 and 28 days after birth (P<.05). By 28 days of age, the kidney weight per body weight ratio decreased in the small litter group (P<.05). Circulating leptin levels increased in the small litter rats (P<.05). Overnutrition had no effect on renal cell proliferation, apoptosis, macrophages and glomerulosclerosis. In the immunoblots and immunohistochemistry, renin and angiotensin II type (AT) 2 receptor expression increased in the overfed rats (P<.05). By contrast, the plasminogen activator inhibitor (PAI)-1 and matrix metalloproteinase (MMP)-9 expression decreased in the overnutrition group (P<.05). The AT 1 receptor, tissue inhibitor of MMP-1, monocyte chemoattractant protein-1, tumor necrosis factor-a, osteopontin and adiponectin expression was not changed. Our data showed that postnatal early overfeeding led to hyperleptinemia, juvenile obesity and the acquired reset of renal maturation. Up-regulation of renin and AT2 and down-regulation of PAI-1 and MMP-9 might contribute to abnormal programming of renal growth in rats exposed to postnatal early overnutrition. (C) 2012 Elsevier Inc. All rights reserved.
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