胃黏膜相关淋巴样组织淋巴瘤中p16蛋白和Ki-67抗原的表达及意义

目的 探讨p16蛋白和Ki-67抗原在胃黏膜相关淋巴样组织淋巴瘤(MALTL)发生、发展中的作用.方法 选择我院病理科1993年3月至2005年6月期间经病理诊断的胃MALTL手术标本,均经2位以上病理科医师会诊筛选,从中确定胃MALTL患者47例.应用免疫组织化学法检测p16蛋白和Ki-67抗原在20例正常胃黏膜组织和47例胃M?cLTL组织中的表达.结果 胃MALTL组织中p16蛋白表达阳性率21.3%(10/47)明显低于胃正常组织(90.0%).伴淋巴结转移的胃MALTL组织中p16蛋白阳性率低于无淋巴结转移组(P<0.05),Ki-67抗原表达的阳性率为87.2%(41/47),明显高于胃正常组织(P<0.05).p16蛋白表达与Ki-67分级呈明显负相关(P<0.05).结论 联合检测p16蛋白和Ki-67抗原有助于评估胃MALTL患者的预后及指导临床治疗.

The significance of p16 protein and Ki-67 antigen expression in gastric mucosa-associated lymphoid tissue lymphoma

To detect the expression of p16 protein and Ki-67 antigen in gastric mucosa-associated lymphoid tissue lymphoma(MALTL)and normal gastric mucosa and to investigate the clinical significance of their expression in the occurrence and development of gastric MALTL.Methods 47 samples of gastric MALTL diagnosed pathologically in the department of pathology of the PLA General Hospital from March 1993 to June 2005 were collected.By using immunohistochemial methods,the expression of p16 protein and Ki-67 antigen was detected in 20 samples of normal gastric tissue and the 47 samples of gastric MALTL.Results The positive rate of p16 protein Was 21.3%(10/47)and 90.0% in gastric MALTL and normal gastric tissue respectively.The positive rate of p16 protein in gastric MALTL was lower than that in normal gastric tissue(P<0.05).The expression of p16 was related to the degree of lymph node metastasis.The positive rate of Ki-67 labelling index(LI)in gnstric MALTL was hiigher than that in normal gastric tissue.A negative correlation was found between the expression of p16 protein and Ki-67 LI(P<0.05). Conclusions Detection p16 and Ki-67 may help to predict the possibility of lymph node metastasis and prognosis in gastric MALTL.