Sci Rep:MiR-193b通过靶向DDAH1调节乳腺癌细胞迁移和血管生成

2017-11-03 MedSci MedSci原创

二甲基精氨酸二甲基氨基水解酶1(DDAH1)负责一氧化氮合酶(NOS),一种不对称二甲基精氨酸(ADMA)的内源性抑制剂的代谢,在调节血管生成中起关键作用。除了血管生成之外,肿瘤可以通过从肿瘤细胞形成血管样结构建立血管网络,称为血管生成拟态(VM)的过程。本研究中,研究人员发现,与正常乳腺上皮细胞相比,在侵袭性MDA-MB-231、MDA-MB-453和BT549乳腺癌细胞系中DDAH1过表达。D

二甲基精氨酸二甲基氨基水解酶1(DDAH1)负责一氧化氮合酶(NOS),一种不对称二甲基精氨酸(ADMA)的内源性抑制剂的代谢,在调节血管生成中起关键作用。除了血管生成之外,肿瘤可以通过从肿瘤细胞形成血管样结构建立血管网络,称为血管生成拟态(VM)的过程。

本研究中,研究人员发现,与正常乳腺上皮细胞相比,在侵袭性MDA-MB-231、MDA-MB-453和BT549乳腺癌细胞系中DDAH1过表达。DDAH1表达与microRNA miR-193b呈负相关。在DDAH1 + MDA-MB-231细胞中,miR-193b的异位表达降低了DDAH1的表达,且ADMA向瓜氨酸的转化。在DDAH1-MCF7细胞中,抑制miR-193b的表达则会提高DDAH1的表达。萤光素酶报告分析证明DDAH1是miR-193b的直接靶标。VM的体外分析中,MDA-MB-231细胞可组织成管结构,而DDAH1敲低或miR-193b表达则会明显抑制此过程。机制上,研究人员发现miR-193b调节MDA-MB-231细胞的增殖和迁移,而DDAH1敲低则抑制细胞迁移。

总之,该研究首次发现乳腺癌细胞中DDAH1的表达、调节和功能,并强调靶向DDAH1表达和/或酶活性可能是治疗侵袭性乳腺癌的有效方法。

原始出处:

Julie-Ann Hulin, Sara Tommasi, et al., MiR-193b regulates breast cancer cell migration and vasculogenic mimicry by targeting dimethylarginine dimethylaminohydrolase 1. Sci Rep. 2017; 7: 13996. Published online 2017 Oct 25. doi: 10.1038/s41598-017-14454-1

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    2018-05-28 smallant2002
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    2017-11-07 txqjm

    谢谢了.学习

    0

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    2017-11-05 yxch36
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    2017-11-05 大爰

    学习了谢谢分享!!

    0

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