A macrophage NBR1-MEKK3 complex triggers JNK-mediated adipose tissue inflammation in obesity.
A macrophage NBR1-MEKK3 complex triggers JNK-mediated adipose tissue inflammation in obesity.
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DOI:
10.1016/j.cmet.2014.06.008
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发表时间:
2014-09-02
期刊:
影响因子:
29
通讯作者:
Moscat J
中科院分区:
文献类型:
--
作者:
Hernandez ED;Lee SJ;Kim JY;Duran A;Linares JF;Yajima T;Müller TD;Tschöp MH;Smith SR;Diaz-Meco MT;Moscat J
The c-Jun NH(2)-terminal kinase (JNK) is a critical determinant of obesity-associated inflammation and glucose intolerance. The upstream mechanisms controlling this pathway are still unknown. Here we report that the levels of the PB1 domain-containing adapter NBR1 correlated with the expression of pro-inflammatory molecules in adipose tissue from human patients with metabolic syndrome, suggesting that NBR1 plays a key role in adipose-tissue inflammation. We also show that NBR1 inactivation in the myeloid compartment impairs the function, M1 polarization and chemotactic activity of macrophages, prevents inflammation of adipose tissue, and improves glucose tolerance in obese mice. Furthermore, we demonstrate that an interaction between the PB1 domains of NBR1 and the mitogen-activated kinase kinase 3 (MEKK3) enables the formation of a signaling complex required for the activation of JNK. Together these discoveries identify an NBR1-MEKK3 complex as a key regulator of JNK signaling and adipose-tissue inflammation in obesity.
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