Interleukin-13 receptor alpha 2 cooperates with EGFRvIII signaling to promote glioblastoma multiforme.

Interleukin-13 receptor alpha 2 cooperates with EGFRvIII signaling to promote glioblastoma multiforme.
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DOI:
10.1038/s41467-017-01392-9
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发表时间:
2017-12-04
影响因子:
16.6
通讯作者:
Lam PYP
Lam PYP
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Newman JP;Wang GY;Arima K;Guan SP;Waters MR;Cavenee WK;Pan E;Aliwarga E;Chong ST;Kok CYL;Endaya BB;Habib AA;Horibe T;Ng WH;Ho IAW;Hui KM;Kordula T;Lam PYP

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白细胞介素-13受体α 2(IL-13 R α2)是一种在人多形性胶质母细胞瘤(GBM)中过表达的癌症相关受体。这种受体在正常大脑中是检测不到的,这使其成为诊断和治疗目的的非常合适的靶点。然而,这种受体在GBM中的病理作用仍有待确定。在这里,我们报告了IL-13 R α2单独诱导人GBM细胞的侵袭性而不影响其增殖。相反,在突变型EGFR(EGFRvIII)存在的情况下,IL-13 R α2在体外和体内促进GBM细胞增殖。在机制上,IL-13 R α2的胞质结构域特异性结合EGFRvIII,这种结合上调EGFRvIII的酪氨酸激酶活性并激活RAS/RAF/MEK/ERK和STAT 3通路。我们的研究结果支持“To Go or To Grow”假说,即IL-13 R α2作为从侵袭到增殖的分子开关,并表明用STAT 3信号传导抑制剂靶向两种受体可能是治疗GBM的治疗方法。白细胞介素-13受体α 2在多形性胶质母细胞瘤中高度表达,但其在这种恶性肿瘤中的作用尚不清楚。在这里,作者表明,这种受体与突变型EGFR相互作用,刺激其激酶活性,从而诱导增殖。
The interleukin-13 receptor alpha2 (IL-13Rα2) is a cancer-associated receptor overexpressed in human glioblastoma multiforme (GBM). This receptor is undetectable in normal brain which makes it a highly suitable target for diagnostic and therapeutic purposes. However, the pathological role of this receptor in GBM remains to be established. Here we report that IL-13Rα2 alone induces invasiveness of human GBM cells without affecting their proliferation. In contrast, in the presence of the mutant EGFR (EGFRvIII), IL-13Rα2 promotes GBM cell proliferation in vitro and in vivo. Mechanistically, the cytoplasmic domain of IL-13Rα2 specifically binds to EGFRvIII, and this binding upregulates the tyrosine kinase activity of EGFRvIII and activates the RAS/RAF/MEK/ERK and STAT3 pathways. Our findings support the “To Go or To Grow” hypothesis whereby IL-13Rα2 serves as a molecular switch from invasion to proliferation, and suggest that targeting both receptors with STAT3 signaling inhibitor might be a therapeutic approach for the treatment of GBM. Interleukin-13 receptor alpha 2 is highly expressed in glioblastoma multiforme but its role in this malignancy is unclear. Here the authors show that this receptor interacts with mutant EGFR, stimulating its kinase activity, thus inducing proliferation.
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