c-Myb Dominates TBK1-Mediated Endotoxin Tolerance in Kupffer Cells by Negatively Regulating DTX4.

c-Myb Dominates TBK1-Mediated Endotoxin Tolerance in Kupffer Cells by Negatively Regulating DTX4.
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c-Myb通过负调节DTX 4主导Kupffer细胞中TBK 1介导的内毒素耐受性。

DOI:
10.1155/2023/5990156
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发表时间:
2023
影响因子:
4.1
通讯作者:
Gong, Jian-Ping
Gong, Jian-Ping
中科院分区:
医学3区
文献类型:
--
作者:
Wu, Yi-Lin;Pan, Le-Han;Yi, Zhu-Jun;Zhang, Wen-Feng;Gong, Jian-Ping

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内毒素耐受作为一种调节过度炎症的保护机制,在调节内毒素休克中起着至关重要的作用。库普弗细胞是介导内毒素耐受的参与者。然而,内毒素耐受性的调节机制尚不清楚。一种名为traf相关NF-κB激活剂(TANK)结合激酶1 (TBK1)的非经典IKK激酶可以调节炎症。在这里,我们发现TBK1是库普弗细胞内毒素耐受所必需的。TBK1通过负向调节p100加工的诱导,在调节内毒素耐受性中起主导作用。Deltex E3泛素连接酶4 (DTX4)是TBK1的负调节因子,可促进TBK1 k48介导的泛素化,间接调节Kupffer细胞的内毒素耐受。我们证明c-Myb转录因子可以负向调节DTX4。c-Myb的过表达可通过降低DTX4转录来降低TBK1的泛素化,并增强内毒素耐受性的抗炎作用。因此,本研究揭示了tbk1介导的库普弗细胞内毒素耐受的新理论。
As a protective mechanism regulating excessive inflammation, endotoxin tolerance plays a vital role in regulating endotoxin shock. Kupffer cells are players in mediating endotoxin tolerance. Nonetheless, the regulatory mechanism regulating endotoxin tolerance is barely known. A nonclassical IKK kinase called TRAF-associated NF-κB activator (TANK)-binding kinase 1 (TBK1) can regulate inflammation. Here, we found that TBK1 is required for endotoxin tolerance in Kupffer cells. TBK1 plays a dominant role in regulating endotoxin tolerance by negatively regulating the induction of p100 processing. Deltex E3 ubiquitin ligase 4 (DTX4), a negative regulator of TBK1, can promote TBK1 K48-mediated ubiquitination and indirectly regulate endotoxin tolerance in Kupffer cells. We demonstrate that the c-Myb transcription factor could negatively regulate DTX4. Overexpression of c-Myb can be used to reduce the ubiquitination of TBK1 by reducing DTX4 transcription and to boost the anti-inflammatory effect of endotoxin tolerance. Thus, this study reveals a novel theory of TBK1-mediated endotoxin tolerance in Kupffer cells.
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