Authors: F Pérez de Heredia J Sánchez T Priego E Larqué M del Puy Portillo A Palou S Zamora M Garaulet
Publish Date: 2009/04/01
Volume: 32, Issue: 8, Pages: 659-665
Abstract
The objective of the present work is to analyse the relationships between changes in adiponectin and fatty acid composition in serum and adipose tissue in rats Samples from serum and different adipose depots periovarian mesenteric and subcutaneous were obtained from ageing rats 14and 20monthold to determine fatty acid composition gasliquid chromatography In serum insulin radioimmunoassay and adiponectin levels enzymelinked immunosorbent assay were also measured while adiponectin gene expression was analysed real timeqPCR in all fat depots There were significant agerelated reductions in adipose tissue saturated SFA and trans fatty acids and increases in monounsaturated fatty acids in parallel with diminished adiponectin expression in periovarian and mesenteric adipose tissue p005 Ageindependent negative correlations were found between adiponectin gene expression in mesenteric adipose tissue and C120 C140 and C1 82 trans fatty acids p005 There was a positive association between serum adiponectin and adipose tissue oleic acid while palmitoleic acid was negatively associated with adiponectin expression and positively correlated with insulin concentration For the first time positive relationships are reported between the proportion of n6 polyunsaturated fatty acids PUFA in adipose tissue and adiponectin concentration and expression In summary adiponectin expression and serum levels are associated with fatty acid composition with SFA trans and palmitoleic fatty acids appearing as negative markers for adiponectin and oleic acid and n6 PU FA as positive ones In addition most associations were found in the visceral depots highlighting the importance of visceral fat in the metabolic status
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