中国全科医学 ›› 2020, Vol. 23 ›› Issue (6): 682-687.DOI: 10.12114/j.issn.1007-9572.2019.00.568

• 专题研究 • 上一篇    下一篇

Tat结合蛋白30在胃癌肿瘤组织中的表达及其与患者预后的关系研究

刘庆伟,李勇*,檀碧波,范立侨,赵群,李兆星,杨沛刚   

  1. 050011河北省石家庄市,河北医科大学第四医院外三科
    *通信作者:李勇,教授,主任医师;E-mail:li_yong_hbth@126.com
  • 出版日期:2020-02-20 发布日期:2020-02-20
  • 基金资助:
    河北省科技支撑计划项目(172777119)

Expression of TIP30 in Gastric Cancer and Its Relationship with Prognosis

LIU Qingwei,LI Yong*,TAN Bibo,FAN Liqiao,ZHAO Qun,LI Zhaoxing,YANG Peigang   

  1. No.3 General Surgery Department,Fourth Hospital of Hebei Medical University,Shijiazhuang 050011,China
    *Corresponding author:LI Yong,Professor,Chief physician;E-mail:li_yong_hbth@126.com
  • Published:2020-02-20 Online:2020-02-20

摘要: 背景 胃癌是一种侵袭性强、预后差的恶性肿瘤,明确有效的治疗靶点对胃癌的治疗具有重要意义。Tat结合蛋白30(TIP30)是新发现的一种抑癌基因,其具有多种功能,包括抑制肿瘤生长、诱导凋亡和抑制血管生成的特性。目前国内外关于TIP30与胃癌相关性的研究鲜有报道。目的 探究TIP30在胃癌肿瘤组织中的表达情况,并分析其与患者预后的关系。方法 收集2012年5月—2013年2月在河北医科大学第四医院行手术治疗的106例胃癌患者的肿瘤组织石蜡标本。另收集2017年就诊于河北医科大学第四医院行胃镜活检的30例胃溃疡患者的正常胃黏膜组织标本。采用免疫组化法检测肿瘤组织和正常胃黏膜组织TIP30、基质金属蛋白酶9(MMP-9)表达情况。分析TIP30、MMP-9在肿瘤组织及正常胃黏膜组织中的阳性表达情况,不同临床特征与肿瘤组织TIP30、MMP-9表达情况以及肿瘤组织中TIP30、MMP-9表达情况的关系。随访截至2018-02-28。采用Kaplan-Meier法绘制胃癌患者的生存曲线,并分析胃癌患者预后的影响因素。结果 TIP30在肿瘤组织中的阳性表达率为41.5%(44/106),低于胃正常黏膜组织的86.7%(26/30)(χ2=19.089,P<0.001)。不同浸润深度、淋巴结转移情况、TNM分期患者肿瘤组织中TIP30表达情况比较,差异有统计学意义(P<0.05)。MMP-9在肿瘤组织中的阳性表达率为82.1%(87/106),高于正常胃黏膜组织的23.3%(7/30)(χ2=37.800,P<0.001)。不同浸润深度、淋巴结转移情况、TNM分期患者肿瘤组织中MMP-9表达情况比较,差异有统计学意义(P<0.05)。Spearman秩相关分析结果显示,肿瘤组织中TIP30、MMP-9表达呈负相关(rs=-0.405,P<0.001)。TIP30阳性表达的胃癌患者中位生存时间为45个月,TIP30阴性表达的胃癌患者中位生存时间为23个月;不同TIP30表达情况的胃癌患者生存曲线比较,差异有统计学意义(χ2=9.025,P=0.003)。Cox比例风险回归模型分析结果显示,淋巴结转移情况〔HR=2.842,95%CI(1.597,5.057)〕、TIP30表达情况〔HR=0.517,95%CI(0.299,0.895)〕是胃癌患者预后的影响因素(P<0.05)。结论 TIP30在胃癌肿瘤组织中低表达,且与肿瘤的侵袭转移有关,同时是患者预后的影响因素。

关键词: 胃肿瘤, Tat结合蛋白30, 基质金属蛋白酶9, 预后, 影响因素分析

Abstract: Background Gastric cancer is an aggressive cancer with poor prognosis.Identification of effective therapeutic target is important in the treatment of gastric cancer.TIP30,a newly identified tumor suppressor,appears to be involved in multiple functions including tumorigenic suppression,apoptosis induction and diminishing angiogenic properties.At present, there are few reports about TIP30 and gastric cancer at home and abroad. Objective To explore the expression of TIP30 in gastric cancer and analyze its correlation with gastric cancer prognosis.Methods Participants were recruited from Fourth Hospital of Hebei Medical University,including 106 cases of gastric cancer receiving surgical treatment during May 2012 to February 2013,and 30 cases of gastric ulcer undergoing gastroscopy in 2017.Immunohistochemistry was used to measure the expression levels of TIP30 and MMP-9 in paraffin-embedded gastric cancer samples of the gastric cancer cases and normal gastric mucosal biopsy specimens of the gastric ulcer cases.Analyses were conducted on abnormal expression of TIP30 and MMP-9 in both gastric cancer and mucosal tissues,expression of TIP30 and MMP-9 in gastric cancer tissues by different clinical features,and correlation of TIP30 and MMP-9 in gastric cancer tissues.The follow-up ended on February 28,2018.The survival curve of gastric cancer cases was drawn with the Kaplan-Meier method.Prognostic factors of gastric cancer cases were analyzed.Results The prevalence of abnormal expression of TIP30 in gastric cancer tissues was significantly lower than that in normal gastric mucosal tissues 〔41.5%(44/106)vs 86.7%(26/30)〕(χ2=19.089,P<0.001).TIP30 expression level in gastric cancer tissues differed substantially by depth of infiltration,presence of lymph node metastasis,and TNM stage(P<0.05).The prevalence of abnormal expression of MMP-9 in gastric cancer tissues was significantly higher than that in normal gastric mucosal tissues 〔82.1%(87/106)vs 23.3%(7/30)〕(χ2=37.800,P<0.001).MMP-9 expression level in gastric cancer tissues varied significantly by depth of infiltration,presence of lymph node metastasis,and TNM stage(P<0.05).Spearman rank correlation analysis demonstrated that TIP30 was negatively correlated with MMP-9 in gastric cancer tissues(rs=-0.405,P<0.01).The median survival time of the gastric cancer patients with TIP30 positive expression and negative expression was 45,and 23 months,respectively.The survive curve of gastric cancer patients changed significantly according to TIP30 expression level(χ2=9.025,P=0.003).Cox proportional hazards regression analysis demonstrated that lymph node metastasis status〔HR=2.842,95%CI(1.597,5.057)〕 and TIP30 expression〔HR=0.517,95%CI(0.299,0.895)〕 were independent prognostic factors of gastric cancer(both P<0.05).Conclusion TIP30 protein is low expressed in gastric cancer,which may play an important role in the invasion and metastasis of gastric cancer,and is closely associated with poor prognosis.

Key words: Stomach neoplasms, TIP30, Matrix metalloproteinase 9, Prognosis, Root cause analysis