青蒿琥酯對(duì)化療耐藥癌細(xì)胞裸鼠腮腺移植瘤c-Myc、ABCG2表達(dá)的影響
[Abstract]:Aim: to investigate the effects of artesunate (Artesunate,ART) and cisplatin (Cisplatin,DDP) alone or in combination on the expression of c-Myc, ABCG2 and m RNA in parotid gland xenografts in nude mice. Methods: human cervical cancer HELA cells were used as parents. Drug resistant progeny cancer cells (HELA-DDP,) were induced by low concentration of DDP in vitro. The drug-resistant cancer cells were inoculated into the parotid gland of BALB/C-nu nude mice, and the model of drug resistant cell parotid gland transplantation tumor was established. After 7 days of inoculation, palpation and observation of the parotid glands of the inoculated side of the animals, if they touched round or round knots, were regarded as successful modeling and injection of the transplanted tumors of the parotid gland in nude mice. Then the nude mice were divided into normal saline control group and DDP 1.0 mg/kg group by random table method. DDP 2.0mg/kg group, ART 50.0 mg/kg,ART 100.0 mg/kg,ART 200.0 mg/kg group, combined treatment group (ART 100 mg/kg DDP 1.0 mg/kg group), were given intraperitoneal injection, once every other day. After 30 days of administration, animals were killed and tumor specimens were obtained. The remaining experimental data were written separately. Immunohistochemical method was used to detect the expression of c-Myc and ABCG2 protein in the tissues of parotid gland xenografts in each group. The expression levels of m RNA and protein of c-Myc and ABCG2 genes in parotid gland xenografts of nude mice were detected by Western Blot and real-time fluorescence quantitative PCR. Results: 1. The results of real-time fluorescence quantitative PCR showed that ART could inhibit the expression of c-Myc and ABCG2 m RNA in xenografts of parotid gland in nude mice from 50 mg/kg to 200 mg/kg. There were significant differences compared with normal saline group (P0.01) and cisplatin group (P0.05). Immunohistochemical results showed that the average optical density of the expression of c-Myc and ABCG2 protein in parotid gland transplanted tumor tissues of nude mice was decreased by ART from 50 mg/kg to 200 mg/kg. Compared with saline group, the difference was significant (P0.05). Compared with cisplatin group, there was significant difference (P0.05). 3.Western Blot results showed that the expression of c-Myc and ABCG2 protein in parotid gland xenografts of nude mice with drug-resistant cancer cells could be decreased by ART from 50 mg/kg to 200 mg/kg. Compared with saline group, there were significant differences (P0.05). Conclusion: 1.ART can inhibit the proliferation and reverse the drug resistance of xenografts of drug resistant cancer cells in nude mice. It may be related to the down-regulation of c-Myc and ABCG2 m RNA and protein expression in xenografts of nude mice by ART. When combined with 2.ART and DDP, ART can not only inhibit the proliferation of tumor cells, but also reverse the chemotherapeutic resistance.
【學(xué)位授予單位】:廣西醫(yī)科大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:R739.8
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