Tiam1和Rac1表达与胃癌病理生物学行为的关系

Relationship between the expression of Tiam1, Rac1 and the pathobiological behavior of gastric cancer

目的 探讨T淋巴瘤侵袭转移诱导因子 1 (Tiam1 )和Ras相关的C3肉毒素底物 1 (Rac1 )表达与胃癌侵袭、转移间的关系。方法 应用链酶亲和素 -生物素过氧化物酶复合物 (SABC)免疫组化法检测 6 0例胃癌及癌旁胃黏膜组织中Tiam1和Rac1蛋白的表达,并分析其与胃癌临床病理参数间的关系。结果 ( 1 )Tiam1蛋白在癌旁胃黏膜组织中染色均为阴性,在胃癌组织中 7 8. 3 3%染色呈阳性 (P< 0. 0 1 ); ( 2 )Rac1蛋白染色阳性率在胃癌组织中 ( 7 1. 6 7% )显著高于癌旁胃黏膜组织( 1 8. 3 3% ) (P< 0. 0 1 ); ( 3 )随胃癌组织分化程度的降低、浸润深度的增加、TNM分期的升高及淋巴结转移的发生,Tiam1和Rac1蛋白的染色阳性率皆升高 (P < 0. 0 5 )。但两者的表达水平与胃癌患者的性别、年龄、癌变原发部位及癌灶大小无关 (P > 0. 0 5 ); ( 4 )Tiam1阳性胃癌组织中的Rac1蛋白表达水平显著高于Tiam1阴性者 (P< 0. 0 1 )。结论 ( 1 )Tiam1和Rac1的表达与胃癌浸润、转移密切相关; ( 2 )在胃癌组织中,Tiam1和Rac1的表达水平呈正相关; ( 3 )对Tiam1和Rac1的联合检测有助于预测胃癌的病理生物学行为。

Objective To investigate the relationship between the expression of T lymphoma invasion and (metastasis) inducing factor 1 (Tiam1), ras-related C3 botulinum toxin substrate 1 (Rac1) with the invasion and metastasis of gastric cancer. Methods The expressions of Tiam1 and Rac1 proteins in 60 cases of (gastric) cancer and paracarcioma gastric mucosa tissues were detected using Strept Avidin-Biotin Complex(SABC) immunohistochemical method,and the correlation between the expression of Tiam1, Rac1 and (clinicopathological) parameters of gastric cancer were analysed. Results (1)There was negative staining of Tiam1 protein in paracarcioma gastric mucosa tissues, while positive staining was detected in gastric cancer (tissues)(78.33%)(P< 0.01). (2)The positive staining rate of Rac1 in gastric cancer tissues((71.67)%) was significantly higher than that in paracarcioma gastric muscosa(18.33%)(P< 0.01). (3)As the degree of histologic differentiation of gastric cancer decreased, depth of invasion increased, stage of TNM was upgraded or lymph node metastasis appeared, the positive staining rate of Tiam1 and Rac1 (proteins) in gastric cancer tissues significantly increased(P< 0.05), but there was no obvious correlation between their expression with the sex, age of patient, primary pathological location or size of gastric cancer(P> 0.05). (4) The expression of Rac1 in patients with positive staining of Tiam1 was significantlyhigher than that in patients with negative staining(P< 0.01). Conclusions Positive (correlation) existed between the expression of Tiam1, Rac1 and the infiltration and metastasis of (gastric) cancer, which suggested that combined examination of Tiam1 and Rac1 in gastric cancer can be helpful to (forecast) its pathobiological behavior.