miR-203 inhibits ovarian tumor metastasis by targeting BIRC5 and attenuating the TGFβ pathway.

miR-203 inhibits ovarian tumor metastasis by targeting BIRC5 and attenuating the TGFβ pathway.
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miR-203 通过靶向 BIRC5 和减弱 TGFβ 途径抑制卵巢肿瘤转移

DOI:
10.1186/s13046-018-0906-0
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发表时间:
2018-09-21
期刊:
Journal of experimental & clinical cancer research : CR
影响因子:
--
通讯作者:
Yue J
Yue J
中科院分区:
其他
文献类型:
--
作者:
Wang B;Li X;Zhao G;Yan H;Dong P;Watari H;Sims M;Li W;Pfeffer LM;Guo Y;Yue J

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我们之前报道,miR-203通过直接靶向转录因子Snai2并抑制上皮间质转化(EMT)而在卵巢癌细胞中发挥肿瘤抑制因子的作用,而BIRC5/survivin则促进EMT。在本研究中,我们使用原位卵巢癌小鼠模型检验了我们的假设,即 miR-203 通过靶向 BIRC5 抑制 EMT 来抑制卵巢肿瘤转移。我们使用慢病毒载体在卵巢癌 SKOV3 和 OVCAR3 细胞中过表达 miR-203,并使用 Transwell 板检查细胞迁移和侵袭。小分子抑制剂YM155用于抑制生存素表达。将表达 miR-203 的细胞和对照 SKOV3 细胞注射到免疫功能低下的 NSG 雌性小鼠体内。收集卵巢原发性肿瘤和转移性肿瘤,采用Western blot和免疫染色测定survivin和EMT标志物的表达。 miR-203 的过表达通过靶向卵巢癌 SKOV3 和 OVCAR3 细胞中的 BIRC5 抑制 EMT。 miR-203的表达增强了生存素抑制剂YM155在体外减少肿瘤细胞迁移和侵袭的能力。我们进一步表明,miR-203 表达减弱了 SKOV3 和 OVCAR3 细胞中的 TGFβ 通路。 miR-203的表达还抑制卵巢原发性肿瘤的生长以及包括肝脏和脾脏在内的多个腹膜器官的转移性肿瘤的生长。 miR-203 通过靶向 BIRC5/survivin 并减弱 TGFβ 通路来抑制卵巢肿瘤转移。本文的在线版本 (10.1186/s13046-018-0906-0) 包含补充材料,可供授权用户使用。
We previously reported that miR-203 functions as a tumor suppressor in ovarian cancer cells by directly targeting transcription factor Snai2 and inhibiting epithelial to mesenchymal transition (EMT), whereas BIRC5/survivin promotes EMT. In this study, we tested our hypothesis that miR-203 inhibits ovarian tumor metastasis by suppressing EMT through targeting BIRC5, using an orthotopic ovarian cancer mouse model. We overexpressed miR-203 in ovarian cancer SKOV3 and OVCAR3 cells using a lentiviral vector and examined cell migration and invasion using transwell plates. The small molecule inhibitor, YM155, was used to inhibit survivin expression. miR-203-expressing and control SKOV3 cells were intrabursally injected into immunocompromised NSG female mice. Primary tumors in ovaries and metastatic tumors were collected to determine the expression of survivin and EMT markers using Western blot and immunostaining. Overexpression of miR-203 inhibits EMT by targeting BIRC5 in ovarian cancer SKOV3 and OVCAR3 cells. miR-203 expression enhances the ability of the survivin inhibitor YM155 to reduce tumor cell migration and invasion in vitro. We further showed that miR-203 expression attenuated the TGFβ pathway in both SKOV3 and OVCAR3 cells. miR-203 expression also inhibited primary tumor growth in ovaries and metastatic tumors in multiple peritoneal organs including liver and spleen. miR-203 inhibits ovarian tumor metastasis by targeting BIRC5/survivin and attenuating the TGFβ pathway. The online version of this article (10.1186/s13046-018-0906-0) contains supplementary material, which is available to authorized users.
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