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作 者:唐丽媛[1] 李楠[1] 缪希松[1] 王元[1] 芮丹云[1] 童毅[1] 王波[1] 李臣[2] 句红萍 谢力[1]
机构地区:[1]昆明学院医学院分子医学研究中心,昆明650214 [2]昆明医科大学第三附属医院&云南省肿瘤医院,昆明650118
出 处:《中国免疫学杂志》2017年第2期196-200,205,共6页Chinese Journal of Immunology
基 金:昆明市科技计划重点项目(2015-1-S-00877);昆明学院人才项目(YJ216002);昆明学院科学研究项目资助(XJL12026)
摘 要:目的:构建表达突变型人源β干扰素(Ser17hI FN-β)的重组腺病毒,体外评价其对结肠癌细胞的抑制增殖作用及细胞周期的影响。方法:人工合成含Ser17突变型hI FN-β基因并克隆至穿梭载体pshuttle-CMV,pshuttle-Ser17hI FNβ与腺病毒骨架质粒pA d同源重组后转染HEK293细胞,包装重组腺病毒rA d-Ser17hI FNβ。rA d-Ser17hI FNβ转染人结肠癌细胞株HT-29,Western blot检测rA d-Ser17hI FNβ在HT-29中的表达;MTT细胞生长实验检测rA d-Ser17hI FNβ对HT-29细胞的体外增殖的影响,流式细胞术检测HT-29细胞周期改变情况。结果:重组腺病毒经HEK293细胞扩增后滴度可达109.125CCID50/ml;Western blot检测到外源性Ser17hI FN-β基因在HT-29细胞中的表达;rA d-Ser17hI FNβ转染后HT-29细胞生长受到抑制(P<0.05),细胞处于S期百分比增加。结论:表达Ser17突变型hI FN-β的重组腺病毒能抑制结肠癌细胞的增殖及诱导S期阻滞,为应用β干扰素对结肠癌进行基因治疗提供了实验基础。Objective: To investigate the effect of replication-defective recombinant adenovirus expressing Ser^(17) mutant human IFN-β on the cell proliferation and cycle regulation of a human colon carcinoma cell line in vitro. Methods: Ser^(17) mutant human IFN-βgene was inserted into a shuttle plasmid( pshuttle-CMV). The pshuttle-Ser^(17) hI FNβ was transformed into Ecoli BJ5183 to make a homologous recombination with adenovirus skeleton genome( pA deasy). And the recombinant plasmid pA d-Ser^(17) hI FNβ was transfected into HEK-293 cell to produce mature adenovirus particles. The change of proliferation and cell cycle of rA d infected HT-29 were analyzed by MTT assay and FACS,respectively. Results: The recombinant adenovirus( rA d-Ser^(17) hI FNβ) with the titer of 109. 125CCID50 /ml was produced. HT29 cells could be infected with the rA d-Ser^(17) hI FNβ in 20 MOI. The expression of Ser^(17) hI FN-β in HT-29 could be detected by Western blot. Significantly,the rA d-Ser^(17)IFNβ inhibited the growth of HT-29 cells and prevented cell cycle progression in S phage in vitro. Conclusion: The recombinant adenovirus expressing Ser^(17)-mutant human IFN-β could suppress the proliferation of colon carcinoma cell in vitro. It provides an experimental basis to apply the IFN-β gene therapy for colon carcinoma in the future.
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