Type I interferons exert anti-tumor effect via reversing immunosuppression mediated by mesenchymal stromal cells.
Type I interferons exert anti-tumor effect via reversing immunosuppression mediated by mesenchymal stromal cells.
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I型干扰素通过逆转间充质基质细胞介导的免疫抑制发挥抗肿瘤作用
作者:
Mesenchymal stromal cells (MSCs) are strongly immunosuppressive via producing nitric oxide (NO) and known to migrate into tumor sites to promote tumor growth, but the underlying mechanisms remain largely elusive. Here, we found that interferon alpha (IFNα)-secreting MSCs showed more dramatic inhibition effect on tumor progression than that of IFNα alone. Interestingly, IFNα-primed MSCs could also effectively suppress tumor growth. Mechanistically, we demonstrated that both IFNα and IFNβ (type I IFNs) reversed the immunosuppressive effect of MSCs on splenocyte proliferation. This effect of type I IFNs was exerted through inhibiting inducible NO synthase (iNOS) expression in IFNγ and TNFα-stimulated MSCs. Notably, only NO production was inhibited by IFNα production of other cytokines or chemokines tested was not suppressed. Furthermore, IFNα promoted the switch from signal transducer and activator of transcription 1 (Stat1) homodimers to Stat1-Stat2 heterodimers. Studies using the luciferase reporter system and chromatin immunoprecipitation assay revealed that IFNα suppressed iNOS transcription through inhibiting the binding of Stat1 to iNOS promoter. Therefore, the synergistic anti-tumor effects of type I IFNs and MSCs were achieved by inhibiting NO production. This study provides essential information for understanding the mechanisms of MSC-mediated immunosuppression and for the development of better clinical strategies using IFNs and MSCs for cancer immunotherapy.
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影响因子:
12.4
作者:
Chen Q;Shou P;Zheng C;Jiang M;Cao G;Yang Q;Cao J;Xie N;Velletri T;Zhang X;Xu C;Zhang L;Yang H;Hou J;Wang Y;Shi Y
通讯作者:
Shi Y
影响因子:
12.4
作者:
通讯作者:
--
影响因子:
10.5
作者:
Kraemer, Oliver H.;Knauer, Shirley K.;Heinzel, Thorsten
通讯作者:
Heinzel, Thorsten
影响因子:
4.4
作者:
Liu, Hua;Kemeny, David Michael;Cao, Tong
通讯作者:
Cao, Tong
影响因子:
2.3
作者:
Ghislain, JJ;Wong, T;Fish, EN
通讯作者:
Fish, EN