摘要目的 探讨PLAC1/CP1基因在原发结直肠腺癌组织中的表达及意义.方法 通过组织芯片和免疫组织化学检测PLAC1/CP1基因在97例结自肠腺癌配对癌组织、癌旁组织中的蛋白表达.结果 PLAC1/CP1基因在97例原发结直肠腺癌组织中的表达率为56.7%(55/97).PLAC1/CP1蛋白的胞核表达率为27.8%(27/97),胞质表达率为43.3%(42/97).女性患者的PLAC1/CP1蛋白胞核表达率显著高于男性患者(x2=6.567,P=0.010).PLAC1/CP1蛋白的胞核表达率随组织学分化程度的降低而升高(x2=8.321,P=0.016);TNM Ⅲ+Ⅳ期的胞核表达率明显高于Ⅰ+Ⅱ期(x2=18.726,P=0.000);有淋巴结转移的原发灶的胞核表达率明显高于无淋巴结转移的病灶(x2=17.407,P=0.000),随淋巴结转移灶数日的增多,胞核表达率升高(x2=22.632,P=0.000).结论 PLAC1/CP1蛋白在原发结直肠腺癌组织中的表达率高,细胞核定位表达与原发结直肠腺癌的组织学分化程度、TNM分期、淋巴结转移及转移程度有关,证明CP1基因在结直肠癌中具有较高的免疫原性,是结直肠癌较理想的免疫治疗靶点.

abstractsObjective To study the expression and significance of PLAC1/CP1 genes in patients with primary colorectal carcinoma. Methods The expression of PLAC1/CP1 genes in 97 cases of colorectal carcinoma was studied using tissue chip technology and immunohistochemistry. Results The rate of PLAC1/CP1 proteins expression in the cases studied was 56. 7% (55/97), with 27. 8% (27/97) being nuclear staining and 43. 3% (42/97) being cytoplasmic staining. The percentage of expression was higher in women than in men (x2 = 6. 567, P= 0.010). The expression in poorly differentiated colorectal carcinoma was significantly higher than that in the well or moderately differentiated carcinoma (x2 =8. 321,P =0. 016). The expression was also significantly higher in stage TNM Ⅲ or Ⅳ tumors than in stage TNM Ⅰ or Ⅱ tumors ( x2 = 18. 726, P =0. 000). The rate was higher in cases with lymph node metastasis than in those with negative lymph nodes ( x2 = 17. 407, P =0. 000), and was higher as the number of metastasisincreasing (x2 = 22. 632, P = 0. 000). Conclusion The expression of PLAC1/CP1 genes correlates with various clinical and pathologic parameters. It carries prognostic significance and may represent a potentialtarget for immunotherapy.