鼻咽癌中ABC转运蛋白基因表达的研究

Expression of ATP-binding cassette transporter genes in nasopharyngeal carcinoma

目的探讨10种耐药相关的ABC转运蛋白在鼻咽癌组织中的表达及意义。方法采用实时荧光定量PCR,检测10种耐药相关的ABC转运蛋白在25例鼻咽癌组织中的表达水平,并与其在正常鼻咽组织中的表达进行比较分析。结果10种耐药相关的ABC转运蛋白在鼻咽癌组织中均有不同程度的表达,其中ABCA2、ABCC3在鼻咽癌组织及鼻咽正常组织中均高表达;ABCC1、ABCC5及ABCG2在鼻咽癌组织中的表达高于其在正常鼻咽组织中的表达,并有统计学差异;而ABCB1、ABCC2、ABCC3、ABCC4、ABCC6及ABCC11在两类样本中均为低表达。结论在鼻咽组织中高表达的转运蛋白与鼻咽癌的天然耐药性有关;在鼻咽癌组织中高表达,而在正常鼻咽组织中表达显著降低的ABC转运蛋白很可能在鼻咽癌对化疗的耐药中起着重要作用,在鼻咽癌组织及正常鼻咽组织中均低表达的转运蛋白的转运药物则可能是鼻咽癌化疗的敏感药物。

Objective To explore the differences in the expression of the ATP-binding cassette （ABC） transporter genes between normal nasopharyngeal tissue and nasopharyngeal carcinoma （NPC）. Methods Real-time quantitative PCR was used to examine the gene expression of 10 ABC transporters in both NPC and.normal nasopharyngeal tissue. Results The 10 drug ABC transporters were expressed at different levels in NPC. ABCA2 and ABCC3 genes were slrongly expressed in both the NPC and normal nasopharyngeal tissues, and ABCC1, ABCC5 and ABCG2 gene expressions were significantly higher in NPC than in normal nasopharyngeal tissue, whereas the ABCB1, ABCC2, ABCC3, ABCC4, ABCC6 and ABCC 11 genes were all expressed at low levels in both the carcinoma and normal tissues. Conclusion The transporters with high expressions in both the cancer and normal samples are correlated to the naturally occurring multidrug resistance of NPC, and those with high expression only in NPC may play an important role in drug resistance to chemotherapeuatic agents. The agents targeting the ABC transporters that are lowly expressed in both the carcinoma and normal tissues might serve as sensitivitive chemotherapeutics against N-PC.