摘要目的 探讨肌球蛋白重链9(myosin heavy chain 9,MYH9)表达与结直肠腺癌发生发展的相关性.方法 应用结直肠腺癌组织芯片和免疫组织化学技术,检测MYH9蛋白在122例结直肠腺癌组织中的表达.采用x2检验及Spearman相关检验分析MYH9表达与结直肠腺癌临床病理特点的相关性,应用Kaplan-Meier方法计算结直肠腺癌患者术后5年生存率及生存时间. 结果 相对于癌旁组织,MYH9在结直肠腺癌中的表达明显上调(P=0.000);MYH9表达与患者的年龄(P=0.050)、临床分期(P=0.000)、淋巴结转移(P =0.010)及远处转移(P=0.000)存在显著相关性,而与患者的性别、肿瘤部位、分化程度及浸润深度无明显相关性(P＞0.05).MYH9高表达和低表达患者术后5年累积生存率分别为49％ (31/63)和86％ (51/59),中位生存时间为65.4(95％ CI:54.8 ～76.0)个月和95.1(95％ CI:84.9～ 105.4)个月,Kaplan-Meier分析显示差异有统计学意义(x2=20.437,P=0.000).多因素分析显示,MYH9可作为独立的预后评估因素(P =0.013).结论 MYH9在结直肠腺癌组织中表达上调,MYH9表达上调与患者的年龄、临床分期、淋巴结转移、远处转移及生存时间相关.

abstractsObjective To determine the expression of myosin heavy chain 9 (MYH9) in colorectal adenocarcinoma tissues and its clinical significance.Methods Immunohistochemistry and tissue-array were used to determine MYH9 expression in human colorectal adenocarcinoma tissues and matched adjacent tissues.A statistical analysis was performed to establish the potential correlation between MYH9 expression and the patients' clinicopathological characteristics,tumor progression,and prognosis.Results MYH9 is up-regulated in colorectal adenocarcinoma tissues compared with matched adjacent tissues (P =0.000),and it was shown that MYH9 expression is significantly correlated with age (P =0.050),clinical stage (P =0.000),lymph node (P=0.010) and distant (P =0.000) metastasis,but not with sex,primary sites,grade,infiltration,clinical stage (all P ＞ 0.05);it was also shown that MYH9 expression had a significant influence on prognosis (x2 =20.437,P =0.000).Multivariate analyses showed that high MYH9 expression is an independent poor prognostic factor for overall survival (P =0.013).Conclusions The up-regulation of MYH9 in colorectal adenocarcinoma closely correlates with age,clinical tumor stage,metastasis and patient's survival.