Influence of Dietary Fat on the Lipid Composition of Perirenal Adipose Tissue in Rats

Abstract

The influence of dietary fat on the composition of perirenal adipose tissue was studied in Wistar rats fed three experimental semisynthetic, isocaloric diets containing different qualities of fat (olive oil, butter and medium chain triglycerides + corn oil). Under these experimental conditions, the saturation index reflects the percentage of fatty acids supplied by each diet; this index was highest in animals fed the diet containing butter and lowest in the group in which olive oil was the dietary fat source. The amount of linoleic acid (the major component of the diunsaturation index) supplied by the diet is directly paralleled by levels of this fatty acid in perirenal adipose tissue, whereas the monounsaturation index in adipose tissues, considered an indicator of the dietary supply of monounsaturated fatty acids in the rat, failed to show a clearly proportional relationship between intake and perirenal adipose tissue levels.

In vivo NMR detection of diet-induced changes in adipose tissue composition

“…Although this method requires a specifi c modifi cation of the standard spectroscopic sequences present on clinical scanners and is performed at relatively higher fi eld with respect to standard clinical scanners, we strongly believe that this method will advance noninvasive human lipid research and aid the understanding of disorders that relate to disturbed lipid metabolism, including obesity, diabetes, and heart disease. pretty consistent with the signifi cant changes in adipose tissue composition found in previous studies on mice ( 27 ) and rats ( 28,29 ), whose diet was supplemented with different oils or those found in adult humans on different diet regiments ( 11 ). As in those experiments, in the PUFA-rich diet, we observed a strong enhancement of the polyunsaturation level, which is refl ected in a striking enhancement of the methylene-bisallylic iZQC peak with respect to the methylene-allylic peak.…”

“…by guest, on May 12, 2018 www.jlr.org Downloaded from while the ratio between the bisallylic protons (P6) and the ␣ methylene protons (P5) yielded information on the fraction of fatty acids that are polyunsaturated [disaturated (F disat ) or triunsaturated (F triunsat )]. Assuming that higher unsaturated fatty acids in the fat depots of humans or mice are scarce, we could write:…”

Use of blubber fatty acid profiles to distinguish dietary differences between grey seals Halichoerus grypus from two UK breeding colonies

“…However, even when the diet is controlled there is never complete correspondence of subject to prey profiles (Dayton et al 1966). A direct connection between the fatty acid composition of dietary and storage lipids has been demonstrated in laboratory animals (Valero-Garrido et al 1990), and samples of adi- (Plakke et al 1983, Field & Clandinin 1984, Tjonneland et al 1993. Studies of polar bears fed in captivity indicate that diet is important in determining adipose fatty acid composition in Carnivora (Colby et al 1993).…”

Influencia de la cantidad, calidad y tipo de grasa de la dieta sobre la composición y distribución de ácidos grasos del tejido adiposo de ratas

“…Los principales ácidos grasos constituyentes del tejido adiposo en la mayoría de los animales son los ácidos palmítico, esteárico, oleico y linoleico, con la excepción de los mamíferos marinos, que se distinguen por un contenido más alto en ácidos grasos de cadena más larga (Body, 1988). Es indudable que la composición del tejido adiposo depende de la dieta (Body, 1988;Phetteplace, et al, 1989;Lhuillery eí al., 1988;Field et al, 1984;Field et al, 1985;Nelson et al, 1987;Valera-Garrido et al, 1990). Así, los animales monogástricos incorporan directamente al tejido adiposo proporciones sustanciales de ácidos grasos procedentes de las plantas que ingieren, tales como los ácidos linolénico y linoleico.…”