Adipose Tissue – Info on Adipose Tissue

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Adipose tissue is infiltrated with macrophages, and its content of long-chain triacylglycerols and ceramides is increased in subjects with increased LFAT compared with equally obese subjects with typical LFAT content. Ceramides or their metabolites could contribute to adverse effects of long-chain fatty acids on insulin resistance and inflammation.

Adipose tissue is specialized connective tissue that functions as the main storage website for fat within the type of triglycerides. Adipose tissue is discovered in mammals in two various forms: white adipose tissue and brown adipose tissue. The presence, amount, and distribution of each and every varies depending upon the species. Most adipose tissue is white, the focus of this review.

Adipose tissue is primarily located beneath the skin Clip in hair extensions, but is also found about internal organs. Inside the integumentary program, which consists of the skin, it accumulates in the deepest level, the subcutaneous layer, supplying insulation from heat and cold.
Connective tissue composed of adipocytes that stores energy in the type of fat and cushions and insulates the body.

Brown adipose tissue is from time to time mistaken for a sort of gland, which it resembles much more than white adipose tissue. It varies in color from dark red to tan, reflecting lipid content. Its lipid reserves are depleted when the animal is exposed to a cold environment, as well as the color darkens. In contrast to white fat, brown fat is richly vascularized and has a lot of unmyelinated nerves which give sympathetic stimulation to the adipocytes.

Fat also serves a structural purpose. Approximately four percent of body weight is produced up of fat inside the organs, skeletal muscles, and central nervous systems. This fat is in some cases referred to as ‘essential fat’ because these organs will stop functioning if it can be depleted. Having too little fat is actually a health hazard. The risk of premature death begins to mount when body mass index (BMI) drops below 18. (BMI is calculated by multiplying weight in pounds by 700 and dividing the product by the square of height in inches.)

Adipose tissues at the L3 vertebra were quantified by magnetic resonance imaging. With weight reduction there was a substantial decrease (P 0.05) in body mass index, waist circumference, and visceral adipose tissue. The plasma concentrations of total cholesterol, triglyceride, insulin, and lath sterol also substantially decreased.

Tissue and cellular investigations, driven by the analysis of transcriptional interactions, revealed an increased amount of interstitial fibrosis in obese WAT, related to an infiltration of unique sorts of inflammatory cells, and suggest that phenotypic alterations of human pre-adipocytes, induced by a pro-inflammatory environment, may perhaps lead to an excessive synthesis of ECM components.

Adipose tissue needs lipolytic enzymes. Dysfunctional lipolysis affects energy homeostasis and may perhaps contribute to the pathogenesis of obesity and insulin resistance. Until now, hormone-sensitive lipase (HSL) was the only enzyme identified to hydrolyze triglycerides in mammalian adipose tissue. Here, we report that a second enzyme Human hair extensions, adipose triglyceride lipase (ATGL), catalyzes the initial step in triglyceride hydrolysis. It’s interesting that ATGL contains a ‘patatin domain’ common to plant acyl-hydrolases. ATGL is highly expressed in adipose tissue of mice and humans.

White adipose tissue (WAT), now regarded as as a pivotal endocrine organ, contributes to the systemic inflammation by producing biomolecules, such as pro-inflammatory mediators, whose estimated number grows continually and whose synthesis is altered along with the expansion of the adipose tissue. These molecules are delivered into the blood stream and exert metabolic and immune functions, as illustrated by the extensively studied adipose hormones leptin and adiponectin. Their functions are crucial for inter-organ cross-talk, body weight homeostasis and most likely in linking adipose tissue to the downstream complications associated with obesity.

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Par gxy123 le vendredi 29 avril 2011

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