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        Effects of damage-regulated autophagy modulator on the radiosensitivity of SGC7901 cell xenografts in nude mice

        2012-08-15 00:54:32ZhaoKui
        外科研究與新技術(shù) 2012年1期

        /Zhao Kui

        (趙奎,Dept Gen Surg,2nd Affil Hosp Soochow Univ,Suzhou 215004)…∥Chin J Gastrointest Surg.-2011,15(8).-892 ~895

        ObjectiveTo investigate the effects of damageregulated autophagy modulator(DRAM)on radiosensitivity and the related mechanisms of implanted tumors of SGC7901 human gastric carcinoma cells in nude mice.MethodsNude mice were randomly divided into model control group,radiotherapy group,and DRAM treatment group and radiotherapy combined with DRAM treatment group.When volume of transplantation tumor were 1.0 cm3,radiotherapy,DRAM treatment was given.On days 3,6 and 9 after treatment,the inhibition rate of tumor growth,pathological changes in tumor specimens,expression levels of P53,proliferating cell nuclear antigen(PCNA),C-myc,F(xiàn)as-L,as well as apoptosis indexes in tumor samples were observed.ResultsInhibition rates of tumor in DRAM combined with radiotherapy were 9.3%,14.1%,16.7%on day 3,6 and 9,respectively,all significantly higher than those in the radiotherapy group(5.0%,8.8%,6.5%,P <0.05).The expressions of PCNA and C-myc protein were down-regulated,while the expressions of P53 and Fas-L were upregulated.ConclusionDamage-regulated autophagy modulator gene may promote cell apoptosis and inhibit cell growth to enhance the radiosensitivity of transplantated gastric tumor in vivo in nude mice.11 refs,4 figs,1 tab.

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