THE LIPIDS OF MOUSE BROWN FAT

1962 ◽  
Vol 40 (1) ◽  
pp. 1705-1715 ◽  
Author(s):  
W. A. Spencer ◽  
G. Dempster
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Palmitoleic Acid ◽  
Silicic Acid Column ◽  
White Mouse ◽  
Brown Fat ◽  
Average Chain Length ◽  
Silicic Acid Column Chromatography ◽  
White Fat

The lipids of the interscapular brown fat of the white mouse have been examined by means of silicic acid column chromatography and quantitative paper chromatography. The fatty acid composition of the glycerides and phosphatides was determined by gas chromatography. Comparative studies of mouse brown and white fat are presented.The fatty acid composition of the glycerides of the two tissues was similar at all ages examined. In both tissues, the average chain length of the glyceride fatty acids increased with age. The glycerides of brown fat at all ages contained less palmitoleic acid and more stearic acid than the corresponding white fat.The adult brown fat contained more polyglycerophosphatide and less sphingomyelin than white fat. The fatty acid composition of the lecithins of the two tissues was very similar. The similarity of brown fat and liver phosphatides is discussed.

THE LIPIDS OF MOUSE BROWN FAT

1962 ◽  
Vol 40 (12) ◽  
pp. 1705-1715 ◽  
Author(s):  
W. A. Spencer ◽  
G. Dempster
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Palmitoleic Acid ◽  
Silicic Acid Column ◽  
White Mouse ◽  
Brown Fat ◽  
Average Chain Length ◽  
Silicic Acid Column Chromatography ◽  
White Fat

The lipids of the interscapular brown fat of the white mouse have been examined by means of silicic acid column chromatography and quantitative paper chromatography. The fatty acid composition of the glycerides and phosphatides was determined by gas chromatography. Comparative studies of mouse brown and white fat are presented.The fatty acid composition of the glycerides of the two tissues was similar at all ages examined. In both tissues, the average chain length of the glyceride fatty acids increased with age. The glycerides of brown fat at all ages contained less palmitoleic acid and more stearic acid than the corresponding white fat.The adult brown fat contained more polyglycerophosphatide and less sphingomyelin than white fat. The fatty acid composition of the lecithins of the two tissues was very similar. The similarity of brown fat and liver phosphatides is discussed.

Effect of noradrenaline chronic administration on brown fat phospholipids

1988 ◽  
Vol 8 (5) ◽  
pp. 465-469 ◽  
Author(s):  
Gérard Mory ◽  
Myriam Gawer ◽  
Jean-Claude Kader
Keyword(s):  
Adipose Tissue ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Brown Adipose Tissue ◽  
Acid Composition ◽  
Cold Exposure ◽  
Chronic Administration ◽  
Sympathetic Tone ◽  
Brown Fat ◽  
Brown Adipose

Chronic cold exposure of rats (9 days at 5°C) induces an alteration of the fatty acid composition of phospholipids in brown adipose tissue. The alteration is due to an increase of the unsaturation degree of these lipids. The phenomenon can be reproduced by 10−7 mole. h−1 administration of noradrenaline for 9 days in rats kept at 25°C. Thus, phospholipid alteration in brown fat of cold exposed rats is most probably a consequence of the increase of sympathetic tone which occurs in this tissue during exposure to cold.

Lipid composition of the trophosome in the beard worm, Oligobrachia mashikoi (Pogonophora)

2006 ◽  
Vol 86 (2) ◽  
pp. 283-286 ◽  
Author(s):  
Masatoshi Mita ◽  
Mariko Deguchi ◽  
Yuichi Sasayama
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Oleic Acid ◽  
Fatty Acid ◽  
Free Fatty Acid ◽  
Acid Composition ◽  
Lipid Composition ◽  
Cholesterol Ester ◽  
Palmitoleic Acid ◽  
Total Fatty Acids

A large quantity of triglyceride was detected histochemically in nutrient-deposit cells of the trophosome in the beard worm (Oligobrachia mashikoi). The lipid extracted from the trophosome was composed of triglyceride, several kinds of phospholipid, free fatty acid, cholesterol, and cholesterol ester. The fatty acid of the triglyceride was comprised mainly of a monoenoic type, such as palmitoleic acid (16:1) and oleic acid (18:1), which accounted for 31% and 37% of the total fatty acids, respectively. In addition, in blood triglyceride, the fatty acid composition was almost the same.

Rare fatty acids in brown fat are substrates for thermogenesis during arousal from hibernation

1989 ◽  
Vol 256 (1) ◽  
pp. R146-R154 ◽  
Author(s):  
C. Carneheim ◽  
B. Cannon ◽  
J. Nedergaard
Keyword(s):  
Fatty Acids ◽  
Adipose Tissue ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Linoleic Acid ◽  
Brown Adipose Tissue ◽  
Acid Composition ◽  
Brown Fat ◽  
Brown Adipose ◽  
Tissue Lipids

Because brown adipose tissue lipids are the preferred substrate for thermogenesis during arousal from hibernation, the fatty acid composition of brown fat lipids was followed during cold acclimation and during a hibernation bout. In control golden hamsters (living at 22 degrees C), the fatty acid composition of the white adipose tissue closely resembled that of the food, but brown adipose tissue contained more animal-derived fatty acids. As an effect of acclimation to cold, the fatty acid composition of brown adipose tissue changed to resemble that of the food, and no marked differences between white and brown adipose tissue were then evident. During a hibernation bout, a major part of the fatty acids accumulated in brown fat during entry into hibernation consisted of "rare" acids, such as homo-gamma-linoleic acid. Homo-gamma-linoleic, together with eicosadienoic acid and lignoceric acid, was preferentially utilized during the early phase of arousal. During this phase, "bulk" fatty acids, such as linoleic acid, were spared, whereas in late arousal, linoleic acid was the preferred substrate. It was concluded that rare fatty acids are of quantitative significance in brown adipose tissue during hibernation and arousal.

scholarly journals Seasonal and Altitudial Variation in Fatty Acid Composition of Native Bees

2012 ◽  
Vol 35 ◽  
pp. 23-30
Author(s):  
Susma Giri ◽  
Michael Dillon
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Palmitoleic Acid ◽  
Composition Analysis ◽  
Native Bees ◽  
Altitudinal Variation ◽  
Tissue Samples ◽  
Flame Ionization

Fatty acids (Fas), the most important energy resources in insects, may change in structure and thus function with changing temperature, a hypothesis termed ‘homeoviscous adaptation’. We investigated whether the proportional composition of the most common fatty acids changes with seasonal (June to August) and altitudinal (2060 – 3290 m) variation in environmental temperature among four species of native bees. We identified the composition and proportion of each fatty acid using gas chromatography coupled with a flame ionization detector (GC-FID). Based on preliminary data, the most common fatty acids found in bees were palmitic acid (C 16:0), stearic acid (C 18:0), oleic acid (C 18:1), linoleic acid (C 18:2) and linolenic acid (C 18:3), with other fatty acids including myristic acid (C 14:0) and palmitoleic acid (C 16:1) also present in small amounts. We are currently 23eticulat GC data for larger bees and establishing protocols for fatty acid composition analysis of small tissue samples. Based on the seasonal and altitudinal variation in ambient temperature, we expect to see variation in fatty acid proportions in bees from different months at both sites.

scholarly journals AGE DYNAMICS OF FATTY ACID COMPOSITION OF FISH MUSCLE TISSUE

2021 ◽  
Vol 246 (2) ◽  
pp. 154-156
Author(s):  
R.M. Papaev ◽  
◽  
G.G. Shalamova ◽  
T.Yu. Motina ◽  
◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Oleic Acid ◽  
Fatty Acid ◽  
Acid Composition ◽  
Muscle Tissue ◽  
Palmitoleic Acid ◽  
Arachidic Acid ◽  
Fish Muscle ◽  
Gas Liquid Chromatography

The article presents the results of studies of the fatty acid composition of the muscle tissue of barbs at the age of 4 and 8 months. It was established by gas-liquid chromatography that the composition contained saturated and mono- and polyunsaturated fatty acids: palmitic, palmitoleic, stearic, arachidic, cis-linoleic, cis-oleic, alpha-linolenic, erucic and selacholic. In adults, in compari-son with juveniles, the content of palmitic and stearic acids was higher by 21.6 and 17.7 %. In barbs at the age of 4 months, in comparison with adults, the content of palmitoleic acid was lower by 42.6 %, cis-oleic acid by 10.4 %, cis-linoleic acid – by 9.3 % and selacholic acid – by 8.3 %. In juvenile barbs, alpha-linoleic and erucic acids were absent, and in adults at the age of 8 months, arachidic acid was absent.

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