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Vitamin A supplementation in early life affects later response to an obesogenic diet in rats.
MedLine Citation:
PMID:  23207406     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Objective:To assess the influence of supplementation with a moderate dose of vitamin A in early life on adipose tissue development and the response to an obesogenic diet later in life.Methods:During the suckling period, rat pups received a daily oral dose of retinyl palmitate corresponding to three times the vitamin A ingested daily from maternal milk. Control rats received the vehicle (olive oil). Short-term effects of treatment on gene expression and morphology of white adipose tissue (WAT) were analyzed in animals on the day after weaning (day 21). To study long-term effects, control and vitamin A-treated rats were fed, after weaning, a normal fat or a high-fat (HF) diet for 16 weeks.Results:WAT of vitamin A-treated young rats (day 21) was enriched in small adipocytes with a reduced expression of adipogenic markers (peroxisome proliferator-activated receptor γ and lipoprotein lipase) and an increased cell proliferation potential as indicated by increased expression of proliferating cell nuclear antigen. Increased retinoic acid (RA)-induced transcriptional responses were present in the tissues of vitamin A-treated young rats (day 21) including WAT. Vitamin A-treated rats developed higher adiposity than control rats on a HF diet as indicated by body composition analysis and increased WAT depot mass, adipocyte diameter, WAT DNA content, leptinemia and adipose leptin gene expression. Excess adiposity gain in vitamin A-treated rats developed in the absence of changes in body weight and was attributable to excess adipocyte hyperplasia. No differences in adiposity were observed between vitamin A-treated rats and control rats on a normal fat diet. Total retinol levels in WAT of vitamin A-treated rats were elevated at weaning (day 21) and normalized by day 135 of age.Conclusion:Vitamin A intake in the early stages of postnatal life favors subsequent HF diet-induced adiposity gain through mechanisms that may relate to changes in adipose tissue development, likely mediated by RA.International Journal of Obesity advance online publication, 4 December 2012; doi:10.1038/ijo.2012.190.
Authors:
N Granados; J Amengual; J Ribot; H Musinovic; E Ceresi; J von Lintig; A Palou; M L Bonet
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-04
Journal Detail:
Title:  International journal of obesity (2005)     Volume:  -     ISSN:  1476-5497     ISO Abbreviation:  Int J Obes (Lond)     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101256108     Medline TA:  Int J Obes (Lond)     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Laboratory of Molecular Biology, Nutrition and Biotechnology-Nutrigenomics, University of the Balearic Islands and CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Palma de Mallorca, Spain.
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