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Bejelentkezés
Kapcsolat
Brown adipose tissue in obesity: Fractalkine-receptor dependent immune cell recruitment affects metabolic-related gene expression. |
Tartalom: | http://real.mtak.hu/52202/ |
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Archívum: | MTA Könyvtár |
Gyűjtemény: |
Status = Published
Type = Article |
Cím: |
Brown adipose tissue in obesity: Fractalkine-receptor dependent immune cell recruitment affects metabolic-related gene expression.
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Létrehozó: |
PolyĂĄk, Ăgnes
Winkler, Zsuzsanna
Kuti, DĂĄniel
Ferenczi, SzilamĂŠr
KovĂĄcs, Krisztina
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Kiadó: |
Elsevier
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Dátum: |
2016
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Téma: |
R1 Medicine (General) / orvostudomĂĄny ĂĄltalĂĄban
R850-854 Experimental medicine / kisĂŠrleti orvostudomĂĄny
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Tartalmi leírás: |
Brown adipose tissue (BAT) plays essential role in metabolic- and thermoregulation and displays morphological and functional plasticity in response to environmental and metabolic challenges. BAT is a heterogeneous tissue containing adipocytes and various immune-related cells, however, their interaction in regulation of BAT function is not fully elucidated. Fractalkine is a chemokine synthesized by adipocytes, which recruits fractalkine receptor (CX3CR1)-expressing leukocytes into the adipose tissue. Using transgenic mice, in which the fractalkine receptor, Cx3cr1 gene was replaced by Gfp, we evaluated whether deficiency in fractalkine signaling affects BAT remodeling and function in high-fat-diet - induced obesity. Homo- and heterozygote male CX3CR1-GFP mice were fed with normal or fat enriched (FatED) diet for 10weeks. Interscapular BAT was collected for molecular biological analysis. Heterozygous animals in which fractalkine signaling remains intact, gain more weight during FatED than CX3CR1 deficient gfp/gfp homozygotes. FatED in controls resulted in macrophage recruitment to the BAT with increased expression of proinflammatory mediators (Il1a, b, Tnfa and Ccl2). Local BAT inflammation was accompanied by increased expression of lipogenic enzymes and resulted in BAT "whitening". By contrast, fractalkine receptor deficiency prevented accumulation of tissue macrophages, selectively attenuated the expression of Tnfa, Il1a and Ccl2, increased BAT expression of lipolytic enzymes (Atgl, Hsl and Mgtl) and upregulated genes involved thermo-metabolism (Ucp1, Pparg Pgc1a) in response to FatED. These results highlight the importance of fractalkine-CX3CR1 interaction in recruitment of macrophages into the BAT of obese mice which might contribute to local tissue inflammation, adipose tissue remodeling and regulation of metabolic-related genes.
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Nyelv: |
angol
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Típus: |
Article
PeerReviewed
info:eu-repo/semantics/article
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Formátum: |
text
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Azonosító: |
PolyĂĄk, Ăgnes and Winkler, Zsuzsanna and Kuti, DĂĄniel and Ferenczi, SzilamĂŠr and KovĂĄcs, Krisztina (2016) Brown adipose tissue in obesity: Fractalkine-receptor dependent immune cell recruitment affects metabolic-related gene expression. BIOCHIMICA ET BIOPHYSICA ACTA, 1861 (11). pp. 1614-1622. ISSN 0006-3002
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Kapcsolat: |
https://doi.org/10.1016/j.bbalip.2016.07.002
MTMT:3108580; doi:10.1016/j.bbalip.2016.07.002
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