Document Detail


Placental malnutrition changes the regulatory network of renal Na-ATPase in adult rat progeny: Reprogramming by maternal α-tocopherol during lactation.
MedLine Citation:
PMID:  20887709     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Prenatal malnutrition is responsible for the onset of alterations in renal Na(+) transport in the adult offspring. Here we investigated the molecular mechanisms by which increased formation of reactive oxygen species during prenatal malnutrition affects the pathways that couple angiotensin II (Ang II) receptors (AT(1)R and AT(2)R) to kidney Na(+)-ATPase in adulthood, and how maternal treatment with α-tocopherol can prevent alterations in the main regulatory cascade of the pump. The experiments were carried out on the adult progeny of control and malnourished dams during pregnancy that did or did not receive α-tocopherol during lactation. Malnutrition during pregnancy increased maternal hepatic and adult offspring renal malondialdehyde levels, which returned to control after supplementation with α-tocopherol. In the adult offspring, placental malnutrition programmed: decrease in Na(+)-ATPase activity, loss of the physiological stimulation of this pump by Ang II, up-regulation of AT(1)R and AT(2)R, decrease in membrane PKC activity, selective decrease of the PKCε isoform expression, and increase in PKA activity with no change in PKA α-catalytic subunit expression. These alterations were reprogrammed to normal levels by α-tocopherol during lactation. The influence of α-tocopherol on the signaling machinery in adult offspring indicates selective non-antioxidant effects at the gene transcription and protein synthesis levels.
Authors:
Leucio D Vieira-Filho; Lucienne S Lara; Paulo A Silva; Felipe T J Santos; Ricardo Luzardo; Fabiana S T Oliveira; Ana D O Paixão; Adalberto Vieyra
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-09-29
Journal Detail:
Title:  Archives of biochemistry and biophysics     Volume:  505     ISSN:  1096-0384     ISO Abbreviation:  Arch. Biochem. Biophys.     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2010-12-08     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372430     Medline TA:  Arch Biochem Biophys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  91-7     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier Inc. All rights reserved.
Affiliation:
Department of Physiology and Pharmacology, Center of Biological Sciences, Federal University of Pernambuco, Recife, Brazil; National Institute of Science and Technology for Structural Biology and Bioimaging, Rio de Janeiro, Brazil.
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