Coordinated oncogenic transformation and inhibition of host immune responses by the PAX3-FKHR fusion oncoprotein.

Coordinated oncogenic transformation and inhibition of host immune responses by the PAX3-FKHR fusion oncoprotein.
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DOI:
10.1084/jem.20050730
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发表时间:
2005-11-21
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Anderson J
Anderson J
中科院分区:
其他
文献类型:
--
作者:
Nabarro S;Himoudi N;Papanastasiou A;Gilmour K;Gibson S;Sebire N;Thrasher A;Blundell MP;Hubank M;Canderan G;Anderson J

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肿瘤已经进化出逃避免疫检测的复杂机制,例如产生免疫抑制性细胞因子和下调主要组织相容性复合体(MHC)表达。我们已经研究了PAX 3-FKHR作为与侵袭性转移性癌症相关的致癌融合蛋白的一个例子。我们发现PAX 3-FKHR改变了通常由Janus激酶/信号转导和转录激活因子(STAT)信号通路调节的基因表达。这是由于PAX 3-FKHR和STAT 3转录因子之间的特异性相互作用而发生的,这导致肿瘤MHC表达的显著降低,以及局部细胞因子浓度的改变以抑制周围的炎性细胞和免疫检测。总的来说,这些数据表明,致癌转录因子可以促进肿瘤生长和组织侵袭,同时抑制局部炎症和免疫反应。这是第一次描述了致癌融合蛋白的免疫调节作用。
Tumors have evolved elaborate mechanisms for evading immune detection, such as production of immunoinhibitory cytokines and down-regulation of major histocompatibility complex (MHC) expression. We have studied PAX3-FKHR as an example of an oncogenic fusion protein associated with an aggressive metastatic cancer. We show that PAX3-FKHR alters expression of genes that are normally regulated by Janus kinase/signal transducer and activator of transcription (STAT) signaling pathways. This occurs as a result of a specific interaction between PAX3-FKHR and the STAT3 transcription factor, which results in a dramatic reduction in tumor MHC expression, and an alteration in local cytokine concentrations to inhibit surrounding inflammatory cells and immune detection. Collectively, these data show that an oncogenic transcription factor can promote tumor growth and tissue invasion while inhibiting local inflammatory and immune responses. This is the first time that an immunomodulatory role has been described for an oncogenic fusion protein.
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