XBP-1 couples endoplasmic reticulum stress to augmented IFN-beta induction via a cis-acting enhancer in macrophages.
XBP-1 couples endoplasmic reticulum stress to augmented IFN-beta induction via a cis-acting enhancer in macrophages.
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DOI:
10.4049/jimmunol.0903052
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发表时间:
2010-08-15
期刊:
影响因子:
--
通讯作者:
Smith JA
中科院分区:
文献类型:
--
作者:
Zeng L;Liu YP;Sha H;Chen H;Qi L;Smith JA
Perturbation of the endoplasmic reticulum (ER) results in a conserved stress response called the “Unfolded Protein Response” (UPR). Macrophages undergoing a UPR respond to LPS with log-fold increased production of IFN-β, a cytokine with diverse roles in innate and adaptive immunity. In this report, we found that thapsigargin-induced ER stress augmented recruitment of IRF-3, CBP/p300, and transcriptional machinery to the murine ifnb1 promoter during LPS stimulation. Although full synergistic IFN-β production requires XBP-1, this UPR-regulated transcription factor did not appreciably bind the ifnb1 promoter. However, XBP-1 bound a conserved site 6.1kb downstream of ifnb1, along with IRF-3 and CBP only during concomitant UPR and LPS stimulation. XBP-1 physically associates with p300, suggesting a mechanism of multi-molecular assembly at the +6.1kb site. Luciferase reporter assays provide evidence this +6kb region functions as an XBP-1-dependent enhancer of ifnb1 promoter activity. Thus, this study identifies a novel role for an UPR-dependent transcription factor in the regulation of an inflammatory cytokine. Our findings have broader mechanistic implications for the pathogenesis of diseases involving ER stress and type I interferon, including viral infection, ischemia-reperfusion injury, protein-misfolding and inflammatory diseases.
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影响因子:
4.4
作者:
Mancuso, Giuseppe;Midiri, Angelina;Teti, Giuseppe
通讯作者:
Teti, Giuseppe
DOI:
10.1016/s0006-291x(03)01049-0
发表时间:
2003-07-11
影响因子:
3.1
作者:
Sakaguchi, S;Negishi, H;Taniguchi, T
通讯作者:
Taniguchi, T
DOI:
10.1073/pnas.88.10.4309
发表时间:
1991-05-01
影响因子:
11.1
作者:
ONO, SJ;LIOU, HC;GLIMCHER, LH
通讯作者:
GLIMCHER, LH
影响因子:
3
作者:
Acharya, Asha;Rishi, Vikas;Vinson, Charles
通讯作者:
Vinson, Charles
DOI:
10.1042/bj20100193
发表时间:
2010-07-01
期刊:
The Biochemical journal
影响因子:
--
作者:
Chen H;Qi L
通讯作者:
Qi L