【摘要】 目的研究11种癌-睾丸(CT)抗原基因在食管癌中的表达,明确食管癌辅助免疫治疗疫苗的组成成分,为食管癌肿瘤疫苗的研制提供理论依据。方法用逆转录-聚合酶链反应法(RT-PCR)检测35例食管癌肿瘤组织以及相对应的癌旁正常食管黏膜组织中11种CT抗原基因的表达。结果所检测的11种CT抗原基因在正常食管黏膜中均无表达。在食管癌组织中表达率最高的为MAGE-3(62.9%);其次为MAGE-4(31.4%)、LAGE-1(28.6%)、MAGE-1(25.7%)、CT10(20.0%)、NY-ESO-1(20.0%)、CT7(5.7%)和SCP-1(2.9%),无一例食管癌组织表达SSX-1、SSX-2、SSX-4基因。在35例食管癌组织中,28例(80.0%)表达至少1种CT基因,21例(60.0%)表达2种以上的CT基因。其中,19.0%(4/21)同时表达4种及4种以上CT基因,占总数的11.4%(4/35)。不表达任何CT基因的7例中,Ⅱ期5例,Ⅰ期和Ⅳ期各1例。NY-ESO-1、LAGE-1、MAGE-1、MAGE-3和MAGE-4基因随肿瘤进展,其表达率增加;而SCP-1和CT10的表达主要集中在较早期的Ⅰ期及Ⅱ期食管癌组织。随着肿瘤分期的提高,CT基因的共表达率呈上升趋势,在Ⅲ期时达到最高,为28.6%。结论(1)包含MAGE-3、MAGE-4和LAGE-1等抗原成分的CT抗原疫苗可应用于食管癌患者的免疫治疗;(2)对不同病理分期的食管癌患者应采取含有不同CT抗原成分的疫苗;(3)SSX-1、SSX-2、SSX-4在食管癌组织中无表达,其具体机制有待进一步研究。更多还原

【Abstract】 Objective To investigate the expression status of 11 different cancer/testis (CT) antigen genes in esophageal carcinoma. Methods Esophageal carcinoma tissue and adjacent normal esophageal mucosa taken from 35 esophageal carcinoma patients were assayed for the expression of 11 different CT antigen genes by RT-PCR techniques. Results Of the 11 CT antigen genes analyzed, none of them was expressed in normal esophageal mucosa. MAGE-3 was found to be the most frequently expressed in esophageal carcinoma tissues (62.9%), followed, in the order of expression frequency, by MAGE4 (31.4%) ,LAGE-1(28.6%),MAGE-1(25.7%),CT10(20.0%),NY-ESO-1(20.0%),CT7(5.7%) and SCP1(2.9%). No expression of SSX-1, SSX-2 and SSX-4 was found. Among the 35 cases, 28 (80.0%) expressed at least one CT antigen gene, 21(60.0%) expressed more than 2 CT antigen genes, and 4 of the 21 (19.0%) expressed more than 4 CT antigens, which accounted for 11.4% of total number of patients (4/35). No CT antigen expression was found in the tumor tissue in 7 cases, including 5 cases in stage Ⅱ and 1 case each in stage Ⅰ and Ⅳ, respectively. Of the 11 CT genes examined, expression of 5 genes (NY-ESO-1, LAGE-1, MAGE-1, MAGE-3 and MAGE-4) was correlated with tumor progression. SCP-1 and CT10 expression was found more frequently in early stage patients. With progression of the disease, the frequency of co-expression of multiple CT antigen genes was significantly increased reaching 28.6% in stage Ⅲ patients. Conclusion Of the 11 different CT antigen genes examined by RT-PCR in esophageal carcinoma, 8 genes were detected in various frequencies in 28 of the 35 esophageal cancer patients studied. They are candidate tumor-associated antigens in the preparation of tumor vaccines for immunotherapy in esophageal cancer patients.更多还原