中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (29): 4660-4665.doi: 10.3969/j.issn.2095-4344.2017.29.012

• 肿瘤干细胞 cancer stem cells • 上一篇    下一篇

抑癌基因WWOX促进卵巢癌干细胞的凋亡及机制

王祎祎1,张向宁2,董 浩3,高 蕾1,崔晓榕1,王春燕1,马瑞琳1   

  1. 1山东大学临床医学院,山东省济南市 250012;2山东大学齐鲁医院妇产科,山东省济南市 250012;3滨州医学院消化内科,山东省滨州市 256603
  • 修回日期:2017-04-30 出版日期:2017-10-18 发布日期:2017-11-08
  • 通讯作者: 张向宁,博士,主任医师,山东大学齐鲁医院妇产科,山东省济南市 250012
  • 作者简介:王祎祎,女,1991年生,山东省威海市人,在读硕士,主要从事妇科肿瘤与微创研究。

Pro-apoptotic effect of a tumor suppressor gene WWOX on ovarian cancer stem cells and its mechanism

Wang Yi-yi1, Zhang Xiang-ning2, Dong Hao3, Gao Lei1, Cui Xiao-rong1, Wang Chun-yan1, Ma Rui-lin1   

  1. 1Shandong University Clinical Medical School, Jinan 250012, Shandong Province, China; 2Department of Gynecology and Obstetrics, Qilu Hospital, Shandong University, Jinan 250012, Shandong Province, China; 3Department of Digestion, Binzhou Medical University, Binzhou 256603, Shandong Province, China
  • Revised:2017-04-30 Online:2017-10-18 Published:2017-11-08
  • Contact: Zhang Xiang-ning, M.D., Chief physician, Department of Gynecology and Obstetrics, Qilu Hospital, Shandong University, Jinan 250012, Shandong Province, China
  • About author:Wang Yi-yi, Studying for master’s degree, Shandong University Clinical Medical School, Jinan 250012, Shandong Province, China

摘要:

文章快速阅读:

文题释义:
Hedgehog信号通路:
Hedgehog信号通路参与机体内细胞的多种生物学功能的发挥过程,由分泌型糖蛋白受体(Hedgehog)、跨膜蛋白受体(Ptch)、跨膜蛋白(SMO)和核转录因子(Gli)组成,与肿瘤的发生有关,在多种肿瘤组织中异常激活,参与肿瘤细胞的增殖和凋亡。
抑癌基因WWOX:WW结构域氧化还原酶基因WWOX,是近年发现的新的抑癌基因,定位于人的普通染色体脆性位点FRA16D(16q23.3-24.1),在多种肿瘤中表达下调或缺失,与WWOX作用相关的蛋白均处于信号转导途径的关键点,对WWOX基因的深入研究,将可能为肿瘤治疗提供新的思路和理论依据。

 

摘要
背景:
研究表明,WWOX能够影响卵巢癌干细胞的生长,其作用机制是否与Hedgehog信号通路有关则未见相关报道。
目的:研究过表达WWOX对卵巢癌干细胞凋亡的作用及机制。
方法:转染WWOX过表达载体pcDNA3.1-WWOX(pcDNA3.1-WWOX组)和pcDNA4.0-WWOX (pcDNA4.0-WWOX组)至卵巢癌干细胞中,同时转染空载体pcDNA3.1(pcDNA3.1组)和pcDNA4.0(pcDNA4.0组),设置未转染组(只加入转染试剂Lipofectamine2000)。培养48 h后,Western blot检测细胞中WWOX水平,MTT检测细胞增殖情况,流式细胞术检测细胞凋亡情况,Western blot检测细胞中Hedgehog信号通路相关蛋白SHH、PTCH1、Gli-1、SMO和凋亡相关蛋白Cleaved Caspase-3的表达水平。用Hedgehog信号通路抑制剂环巴胺作用于未转染的卵巢癌干细胞(环巴胺组)和转染WWOX过表达载体的卵巢癌干细胞(WWOX+环巴胺组),培养48 h后,再进行MTT、流式细胞术、Western blot检测。
结果与结论:①pcDNA4.0-WWOX组细胞中WWOX表达水平明显高于pcDNA3.1-WWOX组(t=27.84,P=0.00)。后期选用转染pcDNA4.0-WWOX的卵巢癌干细胞过表达WWOX;②过表达WWOX能够抑制卵巢癌干细胞增殖,促进卵巢癌干细胞凋亡;③过表达WWOX能够抑制卵巢癌干细胞中SHH、PTCH1、Gli-1、SMO表达,促进Cleaved Caspase-3表达;④环巴胺能够抑制SHH、PTCH1、Gli-1、SMO表达,促进Cleaved Caspase-3表达。环巴胺对Hedgehog信号通路具有明显的抑制作用;⑤环巴胺能够增强过表达WWOX诱导的卵巢癌干细胞凋亡,增强过表达WWOX对卵巢癌干细胞增殖的抑制作用;⑥结果表明,WWOX对卵巢癌干细胞的增殖抑制作用和促凋亡作用可能与抑制Hedgehog信号通路有关。

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程
ORCID: 0000-0001-6579-8939(王祎祎)

关键词: 干细胞, 肿瘤干细胞, 卵巢癌, 凋亡, 信号通路, 增殖, 环巴胺, 包含ww域的氧化还原酶

Abstract:

BACKGROUND: WWOX, a tumor suppressor gene, can affect the growth of ovarian cancer stem cells; however, there is no report on whether its mechanism of action is related to Hedgehog signaling pathway.
OBJECTIVE: To investigate the effect and mechanism of overexpression of WWOX on the apoptosis of ovarian cancer stem cells.
METHODS: pcDNA3.1-WWOX (pcDNA3.1-WWOX group) and pcDNA4.0-WWOX (pcDNA4.0-WWOX group) were transferred into ovarian cancer stem cells, respectively; and meanwhile, pcDNA3.1 (pcDNA3.1 group) and pcDNA4.0 (pcDNA4.0 group) were transferred into the cells. A non-transfection group (only with Lipofectamine2000) was set up. After cultured 48 hours, the levels of WWOX in the pcDNA3.1-WWOX group and pcDNA4.0-WWOX group were detected using western blot assay, and the cell proliferation and apoptosis were detected using MTT assay and flow cytometry, respectively. Western blot assay was also used to detect the levels of Hedgehog signaling pathway associated proteins, SHH, PTCH1, Gli-1, SMO and apoptosis-related protein Cleaved Caspase-3 in the cells. Cyclopamine, Hedgehog signaling pathway inhibitor, was used in ovarian cancer stem cells without transfection (cyclopamine group) and after the transfection of WWOX overexpression vector (WWOX+cyclopamine group) followed by 48 hours of culture, and then MTT, flow cytometry and western blot detections were performed.
RESULTS AND CONCLUSION: (1) The expression level of WWOX in the pcDNA4.0-WWOX group was significantly higher than that in the pcDNA3.1-WWOX group (t=27.84, P=0.00). The ovarian cancer stem cells which were transfected with pcDNA4.0-WWOX were used to overexpress WWOX in the late experiment. (2) Overexpression of WWOX could inhibit the proliferation of ovarian cancer stem cells and promote the apoptosis of ovarian cancer stem cells. (3) Overexpression of WWOX could inhibit the expression of Gli-1, PTCH1, SMO and SHH in ovarian cancer stem cells, and promote the expression of Cleaved Caspase-3. (4) Cyclopamine could inhibit the expression of SHH, PTCH1, Gli-1, SMO, and promote the expression of Cleaved Caspase-3. Cyclopamine had obvious inhibitory effect on Hedgehog signaling pathway. (5) Cyclopamine could enhance the apoptosis induced by overexpression of WWOX in ovarian cancer stem cells , and enhance the inhibition of proliferation of ovarian cancer stem cells induced by overexpression of WWOX. To conclude, WWOX effects on proliferation and apoptosis of ovarian cancer stem cells may be related to the inhibition of Hedgehog signaling pathway.

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

Key words: Neoplastic Stem Cells, Ovarian Neoplasms, Hedgehog Proteins, Apoptosis, Cell Proliferation, Tissue Engineering

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