The cancer stem cell marker CD133 interacts with plakoglobin and controls desmoglein-2 protein levels.

The cancer stem cell marker CD133 interacts with plakoglobin and controls desmoglein-2 protein levels.
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DOI:
10.1371/journal.pone.0053710
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Akiyama T
Akiyama T
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Koyama-Nasu R;Takahashi R;Yanagida S;Nasu-Nishimura Y;Oyama M;Kozuka-Hata H;Haruta R;Manabe E;Hoshino-Okubo A;Omi H;Yanaihara N;Okamoto A;Tanaka T;Akiyama T

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五跨膜糖蛋白 CD133(也称为 prominin-1)已被广泛用作癌症和正常干细胞的标记物。然而,CD133的功能尚未阐明。在这里,我们描述了从卵巢透明细胞癌 (CCC) 建立的癌症干细胞系,并表明 CD133 与斑珠蛋白(也称为 γ-连环蛋白)(一种桥粒连接蛋白)相互作用。我们进一步证明,通过RNA干扰(RNAi)敲低CD133会导致桥粒糖蛋白-2(一种桥粒钙粘蛋白)的下调,并消除CCC干细胞的细胞间粘附和致瘤性。我们推测 CD133 可能是癌症化疗的一个有希望的靶点。
The pentaspan membrane glycoprotein CD133 (also known as prominin-1) has been widely used as a marker for both cancer and normal stem cells. However, the function of CD133 has not been elucidated. Here we describe a cancer stem cell line established from clear cell carcinoma of the ovary (CCC) and show that CD133 interacts with plakoglobin (also known as γ-catenin), a desmosomal linker protein. We further demonstrate that knockdown of CD133 by RNA interference (RNAi) results in the downregulation of desmoglein-2, a desmosomal cadherin, and abrogates cell-cell adhesion and tumorigenicity of CCC stem cells. We speculate that CD133 may be a promising target for cancer chemotherapy.
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