TGFβ selects for pro-stemness over pro-invasive phenotypes during cancer cell epithelial-mesenchymal transition.

TGFβ selects for pro-stemness over pro-invasive phenotypes during cancer cell epithelial-mesenchymal transition.
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在癌细胞上皮-间质转化过程中,TGFβ选择前干性而不是前侵袭性表型。

DOI:
10.1002/1878-0261.13215
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发表时间:
2022-06
期刊:
影响因子:
6.6
通讯作者:
Moustakas, Aristidis
Moustakas, Aristidis
中科院分区:
医学2区
文献类型:
--
作者:
Tsubakihara, Yutaro;Ohata, Yae;Okita, Yukari;Younis, Shady;Eriksson, Jens;Sellin, Mikael E.;Ren, Jiang;Ten Dijke, Peter;Miyazono, Kohei;Hikita, Atsuhiko;Imamura, Takeshi;Kato, Mitsuyasu;Heldin, Carl-Henrik;Moustakas, Aristidis

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转化生长因子 β (TGFβ) 诱导上皮间质转化 (EMT),这与干性和侵袭性相关。间充质-上皮转化(MET)是由 TGFβ 撤退诱导的,并与转移定植相关。 TGFβ是否通过EMT同时促进干性和侵袭性尚不清楚。我们建立了在E-钙粘蛋白启动子下表达红色荧光蛋白(RFP)的乳腺癌细胞模型。在 2D 培养物中,TGFβ 诱导 EMT,产生具有间充质转录组的 RFPlow 细胞,并在 TGFβ 撤除诱导 MET 后恢复具有上皮转录组的 RFP。 RFPlow 细胞产生坚固的乳腺球,具有上皮间质细胞表面特征。被迫粘附的微球球产生了缺乏 RFP 的迁移细胞,RFP 是一种被 TGFβ 受体激酶抑制剂抑制的表型。用 TGFβ 进一步刺激 RFPlow 乳腺球抑制了运动细胞的产生,但增强了乳腺球的生长。因此,在没有外源性 TGFβ 治疗的情况下,乳腺脂肪垫移植的乳腺球建立了具有明显 MET(RFPhigh 细胞)的肺转移瘤。相比之下,TGFβ处理的乳腺球显示出较高的肿瘤引发能力,但转移潜力有限。因此,部分 EMT 和 MET 的生物学背景允许 TGFβ 区分促干性和促侵袭性表型。 TGFβ是否通过上皮间质转化(EMT)同时促进干性和侵袭性仍不清楚。使用在E-钙粘蛋白启动子下表达红色荧光蛋白的乳腺癌细胞模型,我们证明部分间充质-上皮转化(pMET)的生物学背景丰富了乳腺球体的侵袭性和促转移潜力。 TGFβ 作用下持续的部分 EMT 使乳腺球体富集了具有更高肿瘤引发潜力的亲干细胞表型。
Transforming growth factor β (TGFβ) induces epithelial–mesenchymal transition (EMT), which correlates with stemness and invasiveness. Mesenchymal–epithelial transition (MET) is induced by TGFβ withdrawal and correlates with metastatic colonization. Whether TGFβ promotes stemness and invasiveness simultaneously via EMT remains unclear. We established a breast cancer cell model expressing red fluorescent protein (RFP) under the E‐cadherin promoter. In 2D cultures, TGFβ induced EMT, generating RFPlow cells with a mesenchymal transcriptome, and regained RFP, with an epithelial transcriptome, after MET induced by TGFβ withdrawal. RFPlow cells generated robust mammospheres, with epithelio‐mesenchymal cell surface features. Mammospheres that were forced to adhere generated migratory cells, devoid of RFP, a phenotype which was inhibited by a TGFβ receptor kinase inhibitor. Further stimulation of RFPlow mammospheres with TGFβ suppressed the generation of motile cells, but enhanced mammosphere growth. Accordingly, mammary fat‐pad‐transplanted mammospheres, in the absence of exogenous TGFβ treatment, established lung metastases with evident MET (RFPhigh cells). In contrast, TGFβ‐treated mammospheres revealed high tumour‐initiating capacity, but limited metastatic potential. Thus, the biological context of partial EMT and MET allows TGFβ to differentiate between pro‐stemness and pro‐invasive phenotypes. Whether TGFβ promotes stemness and invasiveness simultaneously via epithelial‐mesenchymal transition (EMT) still remains unclear. Using a breast cancer cell model expressing red fluorescent protein under the E‐cadherin promoter, we demonstrate that the biological context of partial mesenchymal–epithelial transition (pMET) enriches mammospheres with invasive and pro‐metastatic potential. Sustained partial EMT under TGFβ enriches mammospheres with a pro‐stemness phenotype with higher tumour‐initiating potential.
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