RNAi沉默CD147基因对人喉癌细胞增殖、侵袭、顺铂敏感性及体内致瘤性的影响
[Abstract]:Objective: CD147, also known as matrix metalloproteinase-inducible factor, belongs to the immunoglobulin superfamily with high glycosylated protein on the surface of the cell membrane. It is highly expressed in many malignant tumors and can promote the survival and growth of the tumor. High expression of invasion and metastasis. CD 147 also increased the resistance of tumor cells to chemotherapeutic drugs. The high expression of CD147 in laryngeal carcinoma cell line Hep2 was reported. Therefore, using the eukaryotic expression vector of CD147 ShRNA constructed in our laboratory, the expression of CD147 in laryngeal carcinoma cell line Hep2 was effectively and specifically silenced by RNAi technique to analyze the invasion of CD147 in laryngeal carcinoma cell line Hep2. The mechanism of metastasis and its sensitivity to cisplatin. Methods: 1) Recombinant plasmid pSilencer / shRNA-control pSilencer-1 pSilencer / shRNA2 was stably transfected into Hep2 cells. The expression of CD147 mRNA and protein in transfected cells was detected by RT-PCR and Western methods. 2) MTT assay was used to detect the proliferation level of Hep2 cells and its sensitivity to cisplatin after transfection of pSilencer- control pSilencer- / shRNA1pSilencer- pSilencer- rshRNA2.3The effect of CD147 shRNA on the invasiveness of Hep2 cells in vitro was detected by Transwell assay. 4) the activity of MMP-2 and MMP-9 in Hep2 cell culture medium after pSilencer- rshRNA-control-pSilencer- control pSilencer- psilencerrshRNA2 transfection was detected by gelatin zymogram. 5) the effect of CD147 shRNA on invasion and metastasis of Hep2 cells in vivo was observed by subcutaneous xenotransplantation in nude mice. Results: 1) the constructed vector was transfected by cationic liposome into human laryngeal carcinoma cell line Hep2G418. After screening with limited dilution method, positive clones were successfully obtained. RT-PCR and western showed that both groups were highly efficient and specific in silencing the larynx. Expression of CD147 in Hep2 cells. 2) MTT assay showed that, The proliferative ability of Hep2 / rshRNA1 and Hep2 / rshRNA2 groups decreased to 77.34% (P0.01) and 70.43% (P0.01), respectively, 62.99% (P0.01) and 73.76% (P0.01) 67.49% (P0.01) and 61.37% (P0.01). Hep2rshRNA1 and Hep2rshRNA2 cells were significantly more sensitive to cisplatin in vitro. The results of gelatinase analysis showed that the MMP-2 and MMP-9 gelatinase activities of the two groups were significantly lower than those of the Hep2 / rshRNA1 and Hep2 / shRNA2 groups. 5) the subcutaneous tumorigenic volume of Hep2p-shRNAl and Hep2p-shRNA2 cells in nude mice was higher than that of Hep2 fractions. Don't lower'to 38.35% and 36.08%. Conclusion: 1) after silencing the expression of CD147 in Hep2 cells by RNAi, the proliferation of Hep2 cells was significantly inhibited, indicating that CD147 could promote the growth of laryngeal cancer cells. 2) the expression of CD147 in Hep2 cells was specifically silenced by RNAi. The sensitivity of CD147 cells to cisplatin was also significantly increased, indicating that CD147 could be used as a target molecule of chemotherapeutic drugs. 3) the CD147 gene of Hep2 cells was silenced by RNAi technique. The ability of invasiveness in vitro and tumorigenesis in vivo were significantly decreased, which indicated that CD147 might be a new target molecule for laryngeal cancer treatment, which was related to the progression of laryngeal carcinoma.
【学位授予单位】:南京师范大学
【学位级别】:硕士
【学位授予年份】:2011
【分类号】:R739.65
【共引文献】
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