IRF8: Mechanism of Action and Health Implications.
IRF8: Mechanism of Action and Health Implications.
复制标题
IRF8:作用机制和健康影响。
作者:
Interferon regulatory factor 8 (IRF8) is a transcription factor of the IRF protein family. IRF8 was originally identified as an essentialfactor for myeloid cell lineage commitment and differentiation. Deletion of Irf8 leads to massive accumulation of CD11b+Gr1+ immature myeloid cells (IMCs), particularly the CD11b+Ly6Chi/+Ly6G− polymorphonuclear myeloid-derived suppressor cell-like cells (PMN-MDSCs). Under pathological conditions such as cancer, Irf8 is silenced by its promoter DNA hypermethylation, resulting in accumulation of PMN-MDSCs and CD11b+ Ly6G+Ly6Clo monocytic MDSCs (M-MDSCs) in mice. IRF8 is often silenced in MDSCs in human cancer patients. MDSCs are heterogeneous populations of immune suppressive cells that suppress T and NK cell activity to promote tumor immune evasion and produce growth factors to exert direct tumor-promoting activity. Emerging experimental data reveals that IRF8 is also expressed in non-hematopoietic cells. Epithelial cell-expressed IRF8 regulates apoptosis and represses Osteopontin (OPN). Human tumor cells may use the IRF8 promoter DNA methylation as a mechanism to repress IRF8 expression to advance cancer through acquiring apoptosis resistance and OPN up-regulation. Elevated OPN engages CD44 to suppress T cell activation and promote tumor cell stemness to advance cancer. IRF8 thus is a transcription factor that regulates both the immune and non-immune components in human health and diseases.
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影响因子:
11.4
作者:
Brass, AL;Zhu, AQ;Singh, H
通讯作者:
Singh, H
DOI:
10.4049/jimmunol.1001950
发表时间:
2011-02-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Feng J;Wang H;Shin DM;Masiuk M;Qi CF;Morse HC 3rd
通讯作者:
Morse HC 3rd
DOI:
10.1073/pnas.87.10.3743
发表时间:
1990-05-01
影响因子:
11.1
作者:
DRIGGERS, PH;ENNIST, DL;OZATO, K
通讯作者:
OZATO, K
影响因子:
3.2
作者:
Dang, Dan;Liu, Ying;Wu, Hui
通讯作者:
Wu, Hui
影响因子:
3.7
作者:
Dimberg, A.;Karehed, K.;Oberg, F.
通讯作者:
Oberg, F.