CXC ligand 5 is an adipose-tissue derived factor that links obesity to insulin resistance.

CXC ligand 5 is an adipose-tissue derived factor that links obesity to insulin resistance.
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DOI:
10.1016/j.cmet.2009.03.002
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发表时间:
2009-04
期刊:
影响因子:
29
通讯作者:
Fajas L
Fajas L
中科院分区:
生物学1区
文献类型:
--
作者:
Chavey C;Lazennec G;Lagarrigue S;Clapé C;Iankova I;Teyssier J;Annicotte JS;Schmidt J;Mataki C;Yamamoto H;Sanches R;Guma A;Stich V;Vitkova M;Jardin-Watelet B;Renard E;Strieter R;Tuthill A;Hotamisligil GS;Vidal-Puig A;Zorzano A;Langin D;Fajas L

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我们在这里显示高水平的表达和分泌的趋化因子CXCL 5的巨噬细胞部分的白色脂肪组织(WAT)。此外,我们发现,CXCL 5显着增加,在人类肥胖的血清相比,瘦的主题。相反,与胰岛素抗性肥胖受试者相比,体重减轻计划后肥胖受试者或肥胖非胰岛素抗性受试者中的CXCL 5浓度降低。最重要的是,我们证明了用重组CXCL 5治疗阻断了小鼠肌肉中胰岛素刺激的葡萄糖摄取。CXCL 5通过激活Jak 2/STAT 5/SOCS 2通路阻断胰岛素信号传导。最后,通过用抗CXCL 5中和抗体或CXCR 2(CXCL 5受体)的拮抗剂治疗肥胖的胰岛素抵抗小鼠,我们证明CXCL 5介导胰岛素抵抗。此外,CXCR 2 −/−小鼠可免受肥胖诱导的胰岛素抵抗。总之,这些结果表明,WAT驻留巨噬细胞分泌CXCL 5代表了肥胖、炎症和胰岛素抵抗之间的联系。
We show here high levels of expression and secretion of the chemokine CXCL5 in the macrophage fraction of white adipose tissue (WAT). Moreover, we find that CXCL5 is dramatically increased in serum of human obese compared to lean subjects. Conversely, CXCL5 concentration is decreased in obese subjects after a weight reduction program, or in obese non-insulin resistant, compared to insulin resistant obese subjects. Most importantly we demonstrate that treatment with recombinant CXCL5 blocks insulin-stimulated glucose uptake in muscle in mice. CXCL5 blocks insulin signaling by activating the Jak2/STAT5/SOCS2 pathway. Finally, by treating obese, insulin resistant mice with either anti-CXCL5 neutralizing antibodies or antagonists of CXCR2, which is the CXCL5 receptor we demonstrate that CXCL5 mediates insulin resistance. Furthermore CXCR2−/− mice are protected against obesity-induced insulin resistance. Taken together, these results show that secretion of CXCL5 by WAT resident macrophages represents a link between obesity, inflammation, and insulin resistance.
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