[发明专利]人RBBP6基因的小干扰RNA及其应用有效
申请号: | 201110121411.2 | 申请日: | 2011-05-11 |
公开(公告)号: | CN102229928A | 公开(公告)日: | 2011-11-02 |
发明(设计)人: | 朱向莹;曹跃琼 | 申请(专利权)人: | 上海吉凯基因化学技术有限公司 |
主分类号: | C12N15/11 | 分类号: | C12N15/11;C12N15/63;C12N15/867;C12N15/113;C12Q1/68;A61K48/00;A61P35/00 |
代理公司: | 暂无信息 | 代理人: | 暂无信息 |
地址: | 201203 上海*** | 国省代码: | 上海;31 |
权利要求书: | 查看更多 | 说明书: | 查看更多 |
摘要: | |||
搜索关键词: | rbbp6 基因 干扰 rna 及其 应用 | ||
技术领域
本发明涉及核酸技术领域,具体地说涉及RNA干扰技术,更具体地涉及具有抑制人RBBP6基因表达的小分子干扰核酸及其应用。
背景技术
RNA干扰是指由双链RNA诱发的基因沉默现象,主要通过阻碍特定基因的翻译或转录来抑制基因表达。研究表明,长度为21-23nt的小RNA分子(small interfering RNA,siRNA)是引起RNA干扰的直接原因(Tuschl T,Zamore PD,Sharp PA,Bartel DP.RNAi:double-stranded RNA directs the ATP-dependent cleavage of mRNA at 21 to 23 nucleotide intervals.Cell 2000,101:25-33.)。RNA干扰在抑制基因表达方面具有高效性、简单性和特异性,目前在基因功能研究和疾病治疗中发挥了重要作用。近几年来,RNA干扰已经在肿瘤治疗方面取得了一些成果(Uprichard,Susan L.The therapeutic potential of RNA interference.FEBS Letters 2005,579:5996-6007)。
RBBP6,全称为Retinoblastoma binding protein 6,定位于人类染色体16p12.2。RBBP6基因编码的蛋白定位于细胞核内。由于氨基端含有保守的锌指结构域,RBBP6蛋白具有泛素酯酶活性,可促进Y-box结合蛋白(细胞周期正向调控因子)的降解(Scott RE,Giannakouros T,Gao S,Peidis P.Functional potential of P2P-R:a role in the cell cycle and cell differentiation related to its interactions with proteins that bind to matrix associated regionsof DNA?J Cell Biochem 2003;90:6-12;Chibi M,Meyer M,Skepu A,G Rees DJ,Moolman-Smook JC,Pugh DJ.RBBP6interacts with multifunctional protein YB-1through its RING finger domain,leading to ubiquitination and proteosomal degradation of YB-1.J Mol Biol 2008;384:908-16)。RBBP6可以与肿瘤抑制因子p53和/或Rb,以及核骨架附着区结合因子形成复合体,通过细胞周期和细胞分化依赖的形式影响基因转录、基因表达和对细胞核的调节(Scott RE,Giannakouros T,Gao S,Peidis P.Functional potential of P2P-R:a role in the cell cycle and cell differentiation related to its interactions with proteins that bind to matrix associated regions of DNA?J Cell Biochem 2003;90:6-12.;Li L,Deng B,Xing G,Teng Y,Tian C,Cheng X,Yin X,Yang J,Gao X,Zhu Y,Sun Q,Zhang L,Yang X,He F.PACT is a negative regulator of p53 and essential for cell growth and embryonic development.Proc Natl Acad Sci U S A 2007;104:7951-6;Scott RE,White-Grindley E,Ruley HE,Chesler EJ,Williams RW.P2P-R expression is genetically coregulated withcomponents of the translation machinery and with PUM2,a translational repressor that associates with the P2P-R mRNA.J Cell Physiol 2005;204:99-105)。RBBP6蛋白在食管癌组织中高水平表达(Yoshitake Y,Nakatsura T,Monji M,Senju S,Matsuyoshi H,Tsukamoto H,Hosaka S,Komori H,Fukuma D,Ikuta Y,Katagiri T,Furukawa Y,Ito H,Shinohara M,Nakamura Y,Nishimura Y.Proliferation potential-related protein,an ideal esophageal cancer antigen for immunotherapy,identified using complementary DNA microarray analysis.Clin Cancer Res 2004;10:6437-48)。过表达的RBBP6蛋白可诱导骨肉瘤Saos2细胞的细胞周期阻滞于有丝分裂的前中期,诱导细胞凋亡,并能增强乳腺癌MCF-7细胞对抗肿瘤药物喜树碱的化疗敏感性(Scott RE,Giannakouros T,Gao S,Peidis P.Functional potential of P2P-R:a role in the cell cycle and cell differentiation related to its interactions with proteins that bind to matrix associated regions of DNA?J Cell Biochem 2003;90:6-12;Scott RE,White-Grindley E,Ruley HE,Chesler EJ,Williams RW.P2P-R expression is genetically coregulated with components of the translation machinery and with PUM2,a translational repressor that associates with the P2P-R mRNA.J Cell Physiol2005;204:99-105;Gao S,Scott RE.P2P-R protein overexpression restricts mitotic progression at prometaphase and promotes mitotic apoptosis.J Cell Physiol 2002;193:199-207;Gao S,Scott RE.Stable overexpression of specific segments of the P2P-R protein in human MCF-7cells promotes camptothecin-induced apoptosis.J Cell Physiol2003;197:445-52;Scott RE,Gao S.P2P-R deficiency modifies nocodazoleinduced mitotic arrest and UV-induced apoptosis.Anticancer Res 2002,22:3837-42)。基于目前已有的关于RBBP6基因在食管癌、骨肉瘤和乳腺癌的报道,可以推测RBBP6作为一个癌基因在肿瘤发生和进展过程中具有重要的功能,并有望成为抗肿瘤治疗的有效靶点。
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