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Cell Cycle:干细胞因子与卵巢癌预后密切相关

2013-01-10 Cell Cycle 好医 Steven译

        耶鲁大学医学院研究人员近日发现了干细胞因子(可促进卵巢癌的发展)与卵巢癌患者预后之间的重要联系。研究为新型卵巢癌靶向疗法铺平了道路,相关研究成果于近日被发表在《细胞周期》(Cell Cycle)杂志上。    首席研究员、耶鲁大学医学院妇产与生殖科助理教授Yingqun Huang博士和她的同事们证实了两种概念之间联系,彻底颠覆

  干细胞

  

  耶鲁大学医学院研究人员近日发现了干细胞因子(可促进卵巢癌的发展)与卵巢癌患者预后之间的重要联系。研究为新型卵巢癌靶向疗法铺平了道路,相关研究成果于近日被发表在《细胞周期》(Cell Cycle)杂志上。 

  首席研究员、耶鲁大学医学院妇产与生殖科助理教授Yingqun Huang博士和她的同事们证实了两种概念之间联系,彻底颠覆了常规的癌症治疗方式。

  第一个概念是“癌症干细胞”。这一概念表明在每个肿瘤的中心部位都有一个很难识别的癌细胞群体,这些癌细胞实际上会促进大多数肿瘤的生长。根据这一概念我们可以预测,普通疗法通常能杀灭大部分肿瘤细胞,但却为癌症干细胞的继续生长留下了非常适宜的环境。

  第二个概念被称为“种子与土壤”。这一概念强调了肿瘤细胞微环境的重要作用,这种微环境是癌细胞生长和扩散所必须的。

  联合研究员、耶鲁癌症中心Nita J. Maihle博士介绍称:“这两种概念对于诸如卵巢癌等通常难以诊断和治疗的成人实体瘤的治疗来说具有特殊的意义。卵巢癌患者常常因肿瘤细胞产生抗性而受到疾病复发的困扰,并最终导致肿瘤生长失控甚至患者出现死亡。”

  研究中,Huang博士和同事们从分子角度定义了这两种概念在卵巢癌中的相互作用。他们利用复杂的基因排序方式证实了干细胞因子Lin28和信号传递分子BMP4(骨成型蛋白)之间的控制联系。

  研究人员表示:“最新的分子型卵巢癌预后数据支持了我们的研究发现,同时研究还发现肿瘤微环境在卵巢癌变过程中起了促进的作用。这些发现将有助于科学家研发出新型的靶向疗法。”


Lin28 regulates BMP4 and functions with Oct4 to affect ovarian tumor microenvironment

Abstract: 
Emerging evidence suggests that the tumor microenvironment plays a critical role in regulating cancer stem cells (CSCs) and tumor progression through both autocrine and paracrine signaling. Elevated production of bone morphogenetic proteins (BMPs) from human ovarian cancer cells and stroma has been shown to increase CSC proliferation and tumor growth. Here, we report that Lin28, a stem cell factor, binds to BMP4 mRNA in epithelial ovarian carcinoma cells, thereby promoting BMP4 expression at the post-transcriptional level. As co-expression of Lin28 and Oct4 (another stem cell factor) has been implicated in ovarian cancer CSCs, we also determined that high levels of Lin28 are associated with an unfavorable prognosis when co-expressed with high levels of Oct4. Together, these findings uncover a new level of regulation of BMP4 expression and imply a novel Lin28/Oct4/BMP4-mediated mechanism of regulating ovarian tumor cell growth, thus holding potential for the development of new strategies for the diagnosis and treatment of ovarian cancer.



    

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