重組腺病毒rhAdEasy-nm23-H1的構(gòu)建與鑒定及體外表達(dá)的實(shí)驗(yàn)研究
本文選題:nm23-H1 切入點(diǎn):重組腺病毒 出處:《昆明醫(yī)學(xué)院》2006年碩士論文 論文類型:學(xué)位論文
【摘要】:【目的】利用復(fù)制缺陷型腺病毒載體和nm23-H1基因構(gòu)建出重組真核表達(dá)載體并鑒定其在體外培養(yǎng)的腫瘤細(xì)胞中的表達(dá)。 【方法】設(shè)計(jì)帶酶切位點(diǎn)Kpn Ⅰ,Xho Ⅰ的引物,應(yīng)用PCR技術(shù)從質(zhì)粒pMD18-T-nm23上克隆出nm23-H1cDNA并定向克隆至穿梭載體pShuttle-CMV,構(gòu)建出重組穿梭質(zhì)粒pShuttle-nm23,經(jīng)過(guò)Kpn Ⅰ,Xho Ⅰ雙酶切和DNA測(cè)序鑒定后,利用pShuttle-nm23和腺病毒骨架載體pAdEasy-1在細(xì)菌BJ5183菌體內(nèi)進(jìn)行同源重組,卡那霉素篩選,構(gòu)建出重組腺病毒質(zhì)粒rhAdEasy-nm23-H1,重組腺病毒質(zhì)粒經(jīng)Pac Ⅰ酶切鑒定和PCR鑒定后,在工程菌XL10-Gold菌體內(nèi)大量擴(kuò)增,CsCL梯度離心純化重組腺病毒質(zhì)粒后轉(zhuǎn)染AD-293細(xì)胞,在AD-293細(xì)胞內(nèi)進(jìn)行腺病毒的包裝擴(kuò)增,測(cè)定重組腺病毒感染性滴度TCID_(50),,行免疫熒光,免疫組化和Western blot實(shí)驗(yàn)以檢測(cè)nm23在肺癌細(xì)胞YTMLC和GLC細(xì)胞中的表達(dá)。 【結(jié)果】將nm23-H1cDNA正向連接到穿梭載體pShuttle-CMV上,Kpn Ⅰ,Xho Ⅰ雙酶切能切出460bp的的片段,DNA測(cè)序結(jié)果與Genebank上nm23-H1基因編碼區(qū)完全一致,該重組質(zhì)粒與腺病毒骨架載體pAdEasy-1在細(xì)菌BJ5183菌體內(nèi)成功進(jìn)行同源重組,并經(jīng)Pac Ⅰ酶切鑒定,得到帶有目的基因的大小為3.0kb或4.5kb的穿梭質(zhì)粒的片段,測(cè)得重組腺病毒感染性滴度為10~7TCID_(50)/mL,經(jīng)免疫熒光,免疫組化和Western blot檢測(cè),nm23在肺癌細(xì)胞YTMLC和GLC里有表達(dá)。 【結(jié)論】本實(shí)驗(yàn)成功構(gòu)建出攜帶nm23-H1cDNA的真核表達(dá)載體重組腺病毒rhAdEasy-nm23-H1:并且用該重組腺病毒對(duì)腫瘤細(xì)胞進(jìn)行轉(zhuǎn)染,證明導(dǎo)入的nm23-H1基因可以在腫瘤細(xì)胞中表達(dá),為下一步進(jìn)行nm23抑制腫瘤細(xì)胞轉(zhuǎn)移的功能鑒定打下基礎(chǔ)。
[Abstract]:[Objective] to construct recombinant eukaryotic expression vector using replication defective adenovirus vector and nm23-H1 gene, and identify its expression in tumor cells in vitro.
[method] designed with restriction sites of Kpn I, Xho I primer, the application of PCR technology to clone nm23-H1cDNA and cloned into the shuttle vector pShuttle-CMV from plasmid pMD18-T-nm23, the recombinant shuttle plasmid pShuttle-nm23, after Kpn I, Xho I double enzyme digestion and DNA sequencing and homologous recombination in bacteria, BJ5183 bacteria the use of pShuttle-nm23 and adenovirus backbone vector pAdEasy-1, kanamycin screening, the recombinant adenovirus plasmid rhAdEasy-nm23-H1, the recombinant adenovirus plasmid by Pac I digestion and PCR assay after amplified in E.coli XL10-Gold in bacteria, CsCL purified recombinant adenovirus plasmid was transfected into AD-293 cells by adenovirus AD-293 cells within the package and amplification of recombinant adenovirus, determination of infectious titer of TCID_ (50), immunofluorescence, immunohistochemistry and Western blot experiments to detect nm23 in lung cancer Expression in cell YTMLC and GLC cells.
[results] the nm23-H1cDNA is connected to the shuttle vector pShuttle-CMV, Kpn I, Xho I double enzyme digestion can be cut out of the 460bp fragment of DNA was proved to be consistent with the Genebank encoding region of nm23-H1 gene, the recombinant plasmid and adenovirus backbone plasmid pAdEasy-1 for homologous recombination in bacteria BJ5183 successfully in bacteria, and by Pac I digestion, get a gene size is 3.0kb or 4.5kb shuttle plasmid fragment obtained recombinant adenovirus infection titer was 10~7TCID_ (50) / mL by immunofluorescence, immunohistochemistry and Western blot assay, the expression of nm23 in YTMLC and GLC lung cancer cells.
[Conclusion] this experiment successfully constructed the eukaryotic expression vector of recombinant adenovirus carrying nm23-H1cDNA and rhAdEasy-nm23-H1 of tumor cells were transfected with the recombinant adenovirus, nm23-H1 gene that can be expressed in tumor cells, and lay the foundation for the functional characterization of nm23 inhibit the metastasis of tumor cells in the next step.
【學(xué)位授予單位】:昆明醫(yī)學(xué)院
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2006
【分類號(hào)】:R346
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