scholarly journals Changes in glucagon and insulin contents of brown adipose tissue after temperature acclimation in rats.

1983 ◽  
Vol 33 (4) ◽  
pp. 661-665 ◽  
Author(s):  
Yoshiaki HABARA ◽  
Akihiro KUROSHIMA
Keyword(s):  
Adipose Tissue ◽  
Brown Adipose Tissue ◽  
Temperature Acclimation ◽  
Brown Adipose ◽  
Glucagon And Insulin

Adrenergically stimulated blood flow in brown adipose tissue is not dependent on thermogenesis

2015 ◽  
Vol 308 (9) ◽  
pp. E822-E829 ◽  
Author(s):  
Gustavo Abreu-Vieira ◽  
Carolina E. Hagberg ◽  
Kirsty L. Spalding ◽  
Barbara Cannon ◽  
Jan Nedergaard
Keyword(s):  
Blood Flow ◽  
Adipose Tissue ◽  
Brown Adipose Tissue ◽  
Uncoupling Protein ◽  
Temperature Acclimation ◽  
The Body ◽  
Doppler Imaging ◽  
Dependent Manner ◽  
Brown Adipose

Brown adipose tissue (BAT) thermogenesis relies on blood flow to be supplied with nutrients and oxygen and for the distribution of the generated heat to the rest of the body. Therefore, it is fundamental to understand the mechanisms by which blood flow is regulated and its relation to thermogenesis. Here, we present high-resolution laser-Doppler imaging (HR-LDR) as a novel method for noninvasive in vivo measurement of BAT blood flow in mice. Using HR-LDR, we found that norepinephrine stimulation increases BAT blood flow in a dose-dependent manner and that this response is profoundly modulated by environmental temperature acclimation. Surprisingly, we found that mice lacking uncoupling protein 1 (UCP1) have fully preserved BAT blood flow response to norepinephrine despite failing to perform thermogenesis. BAT blood flow was not directly correlated to systemic glycemia, but glucose injections could transiently increase tissue perfusion. Inguinal white adipose tissue, also known as a brite/beige adipose tissue, was also sensitive to cold acclimation and similarly increased blood flow in response to norepinephrine. In conclusion, using a novel noninvasive method to detect BAT perfusion, we demonstrate that adrenergically stimulated BAT blood flow is qualitatively and quantitatively fully independent of thermogenesis, and therefore, it is not a reliable parameter for the estimation of BAT activation and heat generation.

Lipolysis in brown adipose tissue of cold- and heat-acclimated hamsters

1977 ◽  
Vol 43 (6) ◽  
pp. 1007-1011 ◽  
Author(s):  
T. Rabi ◽  
Y. Cassuto ◽  
A. Gutman
Keyword(s):  
Fatty Acids ◽  
Adipose Tissue ◽  
Brown Adipose Tissue ◽  
Incubation Medium ◽  
Temperature Acclimation ◽  
The Other ◽  
Glycerol Release ◽  
Tissue Slices ◽  
Brown Adipose ◽  
And Control

Rates of release of free fatty acids (FFA) and glycerol to the incubation medium by brown adipose tissue (BAT) slices isolated from heat-acclimated (H), cold-acclimated (C), and control (N) hamsters in the absence or presence of epinephrine (E) were studied. Rates of FFA and glycerol release by tissue slices isolated from H and N animals were similar. In tissue slices isolated from C animals rate of release of FFA and glycerol was three times as high. Addition of E to the incubation medium (200 microgram/ml) had no effect on the rate of FFA and glycerol release of slices from C animals, but tripled the rates of slices from N, resulting in similar values for the two groups. In slices from H animals the rate of release was lower than in the other two groups, increasing only 1.5-fold. Pretreatment of N animals with triiodothyronine (T3; 0.8 microgram/100 g daily for 7 days) doubled the rates of FFA and glycerol release. Addition of E to the medium affected both pretreated and nontreated slices similarly. Two possible mechanisms by which temperature acclimation controls the lipolytic rate of BAT are suggested by 1) the concentration of specific enzymes and 2) cellular metabolites and hormones which activate existing systems. It seems that both operate in temperature-acclimated hamsters.

Functional characterization of human brown adipose tissue metabolism

2020 ◽  
Vol 477 (7) ◽  
pp. 1261-1286 ◽  
Author(s):  
Marie Anne Richard ◽  
Hannah Pallubinsky ◽  
Denis P. Blondin
Keyword(s):  
Adipose Tissue ◽  
Brown Adipose Tissue ◽  
Functional Characterization ◽  
Human Infants ◽  
Positron Emission ◽  
Brown Adipose ◽  
Treatment Of Obesity ◽  
And Function

Brown adipose tissue (BAT) has long been described according to its histological features as a multilocular, lipid-containing tissue, light brown in color, that is also responsive to the cold and found especially in hibernating mammals and human infants. Its presence in both hibernators and human infants, combined with its function as a heat-generating organ, raised many questions about its role in humans. Early characterizations of the tissue in humans focused on its progressive atrophy with age and its apparent importance for cold-exposed workers. However, the use of positron emission tomography (PET) with the glucose tracer [18F]fluorodeoxyglucose ([18F]FDG) made it possible to begin characterizing the possible function of BAT in adult humans, and whether it could play a role in the prevention or treatment of obesity and type 2 diabetes (T2D). This review focuses on the in vivo functional characterization of human BAT, the methodological approaches applied to examine these features and addresses critical gaps that remain in moving the field forward. Specifically, we describe the anatomical and biomolecular features of human BAT, the modalities and applications of non-invasive tools such as PET and magnetic resonance imaging coupled with spectroscopy (MRI/MRS) to study BAT morphology and function in vivo, and finally describe the functional characteristics of human BAT that have only been possible through the development and application of such tools.

Brown adipose tissue (BAT) can normalize hyperglycemia and hypertriglyceridemia in mice

2011 ◽  
Vol 6 (S 01) ◽  
Author(s):  
M Merkel ◽  
A Bartelt ◽  
K Brügelmann ◽  
J Heeren
Keyword(s):  
Adipose Tissue ◽  
Brown Adipose Tissue ◽  
Brown Adipose

The influence of thyroid dysfunction on the activity of brown adipose tissue in mice detected by [18F]FDG PET/MR

2014 ◽  
Vol 9 (S 01) ◽  
Author(s):  
K Krause ◽  
M Kranz ◽  
V Zeisig ◽  
N Klöting ◽  
K Steinhoff ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Brown Adipose Tissue ◽  
Fdg Pet ◽  
Thyroid Dysfunction ◽  
Brown Adipose ◽  
18F Fdg
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