目的 在體外實(shí)驗(yàn)研究的基礎(chǔ)上進(jìn)一步觀察反義硫代磷酸酯寡核苷酸(ASODN)在裸鼠體內(nèi)逆轉(zhuǎn)耐藥肝癌細(xì)胞SMMC-7721/ADM多藥耐藥基因mdr1的作用。
方法 取體外培養(yǎng)的耐藥肝癌細(xì)胞(1×107個(gè)/0.2 ml)注射于裸小鼠腋部皮下,建立耐藥肝癌模型,而后將成模裸鼠分成4組,每組各5只。ASODN組在裸鼠腫瘤局部注射濃度為3 μmol/L的ASODN 50 μl和脂質(zhì)體Lipofectamine 50 μl,并在腹腔內(nèi)注射阿霉素(ADM,每天10 mg/m2); 正義鏈組(SODN組)與ASODN組的方法、劑量相同; 對(duì)照1組、對(duì)照2組分別在裸鼠局部注射Lipofectamine 50 μl和生理鹽水200 μl,同時(shí)腹腔注射ADM(每天 10 mg/m2)。寡核苷酸于觀察的兩周內(nèi)每周前3 d注射; ADM于每周的第2~4天使用。Lipofectamine和生理鹽水使用時(shí)間與寡核苷酸相同。
結(jié)果 隨著時(shí)間的推移,4組裸鼠的腫瘤體積逐漸增大,且于第5天開始變化明顯,此后各時(shí)相之腫瘤體積與前一時(shí)相比較,差異均有顯著性意義(P<0.05); ASODN組的腫瘤體積在第5天后明顯小于其他3組(P<0.05); 而對(duì)照1組、對(duì)照2組及SODN組各時(shí)相的腫瘤體積差異無顯著性意義(P gt;0.05)。該實(shí)驗(yàn)結(jié)果提示,SODN及脂質(zhì)體對(duì)裸鼠腫瘤的生長無明顯影響,而ASODN對(duì)裸鼠腫瘤的生長具有明顯的抑制作用。
結(jié)論 ASODN在體內(nèi)同樣可逆轉(zhuǎn)SMMC-7721/ADM細(xì)胞的耐藥性,使腫瘤在一定時(shí)間內(nèi)處于生長相對(duì)緩慢狀態(tài)。
引用本文: 羅華友,嚴(yán)律南,楊家印,劉自明,林琦遠(yuǎn). ASODN逆轉(zhuǎn)耐藥肝癌細(xì)胞多藥耐藥基因mdr1的體內(nèi)實(shí)驗(yàn)研究. 中國普外基礎(chǔ)與臨床雜志, 2004, 11(2): 142-144. doi: 復(fù)制
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