中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (18): 2897-2902.doi: 10.3969/j.issn.2095-4344.2014.18.019

• 器官移植动物模型 organ transplantation and animal model • 上一篇    下一篇

小干扰RNA抑制卵巢癌模型裸鼠移植瘤葡萄糖调节蛋白94的表达及意义

张丽颖1,徐爱丽1,李佩玲1,艾丽敏2   

  1. 1哈尔滨医科大学附属第二医院妇产科,黑龙江省哈尔滨市  150086;2哈尔滨市93220部队门诊部,黑龙江省哈尔滨市  150001
  • 收稿日期:2014-03-10 出版日期:2014-04-30 发布日期:2014-04-30
  • 作者简介:张丽颖,女,1978 年生,黑龙江省哈尔滨市人,汉族,2001年哈尔滨医科大学毕业,博士,副主任医师,主要从事妇科肿瘤方面的研究。
  • 基金资助:

    黑龙江省青年科学基金(QC2009C82);黑龙江省博士后科研启动金资助(LBH-Q11051);黑龙江省卫生厅科研课题(2007-320)

Small interfering RNA inhibits glucose regulated protein 94 expression in transplantable models of human ovarian carcinoma in nude mice 

Zhang Li-ying1, Xu Ai-li1, Li Pei-ling1, Ai Li-min2   

  1. 1Department of Gynecology and Obstetrics, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, Heilongjiang Province, China; 2Clinic of Harbin 93220 Army, Harbin 150001, Heilongjiang Province, China
  • Received:2014-03-10 Online:2014-04-30 Published:2014-04-30
  • About author:Zhang Li-ying, M.D., Associate chief physician, Department of Gynecology and Obstetrics, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, Heilongjiang Province, China
  • Supported by:

    Youth Science Foundation of Heilongjiang Province, No. QC2009C82; Postdoctoral Research Start-up Foundation of Heilongjiang Province, No. LBH-Q11051; grants of Health Ministry of Heilongjiang Province, No. 2007-320

摘要:

背景:一些实验在模型鼠移植瘤中葡萄糖调节蛋白94被敲除后,细胞黏附中断,刺激肝起源细胞增殖,进而促进肝肿瘤的发生,推测葡萄糖调节蛋白94在肝癌中起到保护作用。
目的:应用小干扰RNA技术抑制裸鼠卵巢癌模型皮下移植瘤内质网分子伴侣葡萄糖调节蛋白94的基因表达,探讨移植瘤中葡萄糖调节蛋白94基因及蛋白表达的变化对移植瘤生长的影响。
方法:从GeneBank中选取人类葡萄糖调节蛋白94基因序列,构建受控于人RNA聚合酶Ⅲ启动子U6 的真核表达载体psiSTRIKETM/葡萄糖调节蛋白94。建立人卵巢癌HO-8910细胞株裸鼠皮下接种模型,并将真核表达载体转染入裸鼠移植瘤体内,观察肿瘤生长情况。卵巢癌裸鼠模型经过不同给药方案干预后分为特异性小干扰RNA组,非特异性小干扰RNA组和生理盐水对照组, RT-PCR和免疫组化SP法检测葡萄糖调节蛋白94 mRNA和蛋白在肿瘤内的表达情况,并观察模型裸鼠的移植瘤生长情况。
结果与结论:成功构建RNA干扰质粒载体,所有裸鼠模型均接种成功,5 d后即可见皮下肿瘤形成,14 d左右肿瘤直径达7-10 mm。转染质粒完毕后抑瘤率为65.1%,与非特异性小干扰RNA组和生理盐水对照组比较,差异有显著性意义(P < 0.01)。psiSTRIKETM/GRP94治疗后瘤体内葡萄糖调节蛋白94 mRNA和蛋白显著下调(P < 0.01)。说明靶向葡萄糖调节蛋白94 mRNA的小干扰RNA可显著抑制人卵巢癌裸鼠移植瘤的生长,其机制可能是诱导葡萄糖调节蛋白94 mRNA和蛋白表达下调所致。



中国组织工程研究
杂志出版内容重点:肾移植肝移植移植;心脏移植;组织移植;皮肤移植;皮瓣移植;血管移植;器官移植组织工程


全文链接:

关键词: 实验动物, 组织构建, 模型构建, 卵巢癌, 细胞株, GRP94, 小干扰RNA, 肿瘤移植, 基因载体

Abstract:

BACKGROUND: After glucose regulated protein 94 (GRP94) was knockout in model mice of transplanted tumor, cellular adhesion is terminated, thus stimulating the proliferation of liver-derived cells and promoting the development of liver cancer. We speculate that GRP94 plays a protective role against liver cancer.
OBJECTIVE: To investigate the expression of endoplasmic reticulum molecular chaperone GRP94 mRNA and protein with small interfering RNA technique in nude mice model of transplantable human ovarian carcinoma, and to explore the effect of GRP94 mRNA and protein expression on the growth of transplanted tumor.
METHODS: The gene sequences of human GRP94 were obtained from Gene Bank. psiSTRIKETM/GRP94 was constructed, which is eukaryotic expression vector controlled by the U6 promoter of human RNA polymerase Ⅲ. The transplantable model of human ovarian carcinoma in nude mice was established using human ovarian  cancer HO-8910 cell line. The eukaryotic expression vector was transfected into the transplanted tumors in nude mice, and the growth of the tumor was observed. The nude mice models were divided into three groups, specific small interfering RNA group, non-specific small interfering RNA group and saline control group. The volumes of the subcutaneous tumor were determined. RT-PCR and immunohistochemistry were used to detect the mRNA and protein expression of GRP94 respectively.
RESULTS AND CONCLUSION: The recombinant plasmid of RNA interference specific for GRP94 was successfully constructed. The subcutaneous tumors appeared in all the nude mice 5 days after transplantation. The diameter of subcutaneous tumors was 7-10 mm 14 days after transplantation. The growth of subcutaneous tumors in nude mice with interference specific for GRP94 treatment was significantly decreased as compared with non-specific small interfering RNA group and control group (P < 0.05). The proliferation activity was inhibited by 65.1%. The expression of GRP94 mRNA and protein was significantly down-regulated after treatment of psiSTRIKETM/GRP94 (P < 0.01). The transfection of psiSTRIKETM/GRP94 could significantly induce inhibitory effects on the growth of ovarian carcinoma in nude mice, and the underlying mechanism is associated with the down-regulated expression of GRP94 mRNA and protein.



中国组织工程研究
杂志出版内容重点:肾移植肝移植移植;心脏移植;组织移植;皮肤移植;皮瓣移植;血管移植;器官移植组织工程


全文链接:

Key words: RNA, small interfering, ovarian neoplasms, neoplasm transplantation, oncogenes, plant tumor-inducing plasmids

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