TROP2蛋白在涎腺腺样囊性癌中的表达及与患者预后的关系

Expression of TROP2 protein in salivary adenoid cystic carcinoma and its correlation with the prognosis of pa⁃tients with salivary adenoid cystic carcinoma

目的 探讨滋养层细胞表面抗原2(trophoblast cell-surface antigens 2,TROP2)在涎腺腺样囊性癌(salivary adenoid cystic carcinoma,SACC)中的表达,并分析其与临床病理特征之间的关系,明确TROP2的表达与SACC患者预后的相关性。方法 本研究获得单位伦理委员会的批准,采用免疫组织化学方法检测TROP2在85例SACC组织及各自癌旁组织中的表达情况,分析其表达情况与临床病理特征的关系;利用Kaplan-Meier法对40例SACC患者进行TROP2蛋白表达与患者术后五年无病生存期(disease-free survival,DFS)的关系分析;同时,采用Logistic回归模型分析影响SACC患者预后的因素。结果 TROP2在SACC组织中的低表达或不表达率显著高于癌旁组织(P<0.001);TROP2低表达或不表达与SACC患者肿瘤的生长以及临床分期呈显著正相关性(P<0.05);Kaplan-Meier生存分析显示:TROP2蛋白低表达或不表达的SACC患者的DFS显著低于高表达患者(P<0.05),预后不良。Logistic回归模型预后分析显示:TROP2蛋白低表达或不表达(OR=5.37;95%CI:1.03~28.08;P=0.046)与Ⅲ-Ⅳ临床分期(OR=6.89;95%CI:1.37~34.77;P=0.019)均为影响SACC患者预后的危险因素。结论 TROP2蛋白在SACC组织中低表达或不表达,患者预后不良,与肿瘤的生长、临床分期呈正相关,且TROP2低表达或不表达可作为SACC患者预后不良的独立危险因素,TROP2为SACC患者预后不良的标志物。

Objective To investigate the expression of trophoblast cell-surface antigen 2(TROP2)in salivary ade-noid cystic carcinoma(SACC)in order to analyze its relationship with TROP2 expression and clinicopathological features,as well as to clarify the correlation between TROP2 expression and the prognosis of patients with SACC.Methods With approval from the ethics committee,the expression of TROP2 in 85 SACC and paracancer tissue sam-ples was detected by using the immunohistochemical method,and the relationship between TROP2 expression and clini-copathological characteristics was analyzed.The Kaplan-Meier method was used to analyze the relationship between TROP2 protein expression and 5-year disease-free survival(DFS)in 40 patients with SACC.Furthermore,the logistic re-gression model was used to analyze the prognostic factors of patients with SACC.Results The low or no expression rate of TROP2 in SACC tissues was significantly higher than that in paracancer tissues(P<0.001).Low or no expres-sion of TROP2 was significantly positively correlated with tumor growth and clinical staging in patients with SACC(P<0.05).Kaplan-Meier survival analysis showed that the DFS of patients with SACC with low or no expression of TROP2 protein was significantly lower than those of patients with high expression of TROP2 protein(P<0.05),and the progno-sis was poor.The logistic regression model showed that low or no expression of TROP2 protein(OR=5.37;95%CI:1.03-28.08;P=0.046)andⅢ-Ⅳclinical staging(OR=6.89;95%CI:1.37~34.77;P=0.019)were risk factors affect-ing the prognosis of patients with SACC.Conclusion Low or no expression of TROP2 protein in SACC tissues leads to poor prognosis of patients and is positively correlated with tumor growth and clinical staging.In addition,low or no ex-pression of TROP2 can be used as an independent prognostic risk factor for poor prognosis in patients with SACC,and TROP2 is a marker of poor prognosis in patients with SACC.