Nat Commun:促进三阴性乳腺癌扩散转移的“核心原因”已确定

2018-02-11 佚名 medicalxpress

克利夫兰诊所的研究人员在《自然通讯》杂志上发表了一项新的干细胞途径,促进一种高度侵袭性的乳腺癌三重阴性乳腺癌得以茁壮成长。

克利夫兰诊所的研究人员在《自然通讯》杂志上发表了一项新的干细胞途径,促进一种高度侵袭性的乳腺癌三重阴性乳腺癌得以茁壮成长。

乳腺癌的激素治疗阻止癌细胞与雌激素和孕酮等激素相互作用,这些激素为癌细胞的生长和扩散提供了动力。然而,三重阴性的乳腺癌细胞缺乏与这些激素和生长因子结合所需的受体。如果没有这种受体,典型的治疗就无法奏效,因此患有这种亚型乳腺癌的妇女的存活率很低。

克利夫兰诊所勒纳研究所的研究人员认为,具有攻击性的癌细胞群,癌症干细胞,是导致包括三重阴性乳腺癌在内的许多癌症都难以治疗的核心原因。肿瘤干细胞自我复制、快速生长和扩散,并随着肿瘤环境的变化而改变其表型。

新研究,确定了一种前所未有的癌症干细胞存活途径,这种途径可能成为新的三阴性乳腺癌治疗的潜在靶点。

研究人员表示:“三重阴性乳腺癌对治疗有抗药性,复发率很高,这种具有攻击性的亚型约占乳腺癌的15-20%。我们的发现还处于早期阶段,但我们希望,针对这些癌症干细胞的研究将带来新的治疗方法,使妇女能够获得成功的治疗,并改善其结果。”

研究小组研究了一种叫做连接蛋白26(Cx 26)的蛋白质,它属于连接蛋白类。虽然曾经被认为可以抑制肿瘤,但最近的研究表明,连接蛋白可能实际上支持肿瘤的进展,帮助细胞与细胞之间的通讯。

研究人员将健康的乳腺组织与三重阴性的乳腺癌组织进行比较,发现Cx 26是病变组织中表达最多的连接蛋白,而在正常乳腺组织中表达最高。他们还观察到,Cx 26在癌症干细胞中的表达高于非癌症干细胞,而且这种蛋白在细胞内而不是在细胞表面表达。研究人员还发现,Cx 26与另外两种已知的促进肿瘤维持和生长的蛋白质有关。

研究人员总结道:“还需要进一步的研究,但这一发现表明,抑制cx 26和相关途径可能是阻止或防止三阴性乳腺癌干细胞自我更新和传播的一种新策略,也可能为诊断测试提供一个目标,帮助临床医生预测特定癌症类型患者的健康结果和无复发生存。”

原始出处:

Praveena S. Thiagarajan, Maksim Sinyuk, Soumya M. Turaga, et.al. Cx26 drives self-renewal in triple-negative breast cancer via interaction with NANOG and focal adhesion kinase. Nature Communicationsvolume 08 February 2018

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    2018-11-24 liuli5079
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    2018-03-07 半夏微凉

    学习了谢谢分享

    0

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    2018-12-12 liye789132251
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    2018-02-13 xlysu
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    2018-02-11 虈亣靌

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