CNTN-1和VEGF-C表达水平与肝癌肝移植术后复发转移及预后的关系

Relationship between CNTN-1 and VEGF-C expression levels and recurrence, metastasis and prognosis of hepatocellular carcinoma patients after liver transplantation

    摘要
  • 摘要:
      目的  探讨接触蛋白（CNTN）-1和血管内皮生长因子（VEGF）-C的表达与肝细胞癌（肝癌）肝移植患者术后复发转移及预后的关系。
      方法  收集105例行经典原位肝移植治疗的原发性肝癌患者的临床资料及病理标本。采用免疫组织化学染色法检测肝癌组织和相应的癌旁肝组织中CNTN-1和VEGF-C的表达情况，并对其与临床病理特征及术后复发转移及预后的关系进行统计学分析。
      结果  肝癌组织的CNTN-1与VEGF-C高表达率分别为46.7%和39.0%，在癌旁组织分别为11.4%和19.0%，两者比较差异均有统计学意义（均为P＜0.05）。Spearman相关分析显示CNTN-1与VEGF-C的表达呈正相关（P < 0.005）。χ2检验显示，CNTN-1蛋白的表达与甲胎蛋白（AFP）高低（P=0.017），肿瘤、淋巴、转移（TNM）分期（P＜0.001）呈正相关，与分化程度呈负相关（P＜0.001）；VEGF-C高表达与TNM分期呈正相关（P＜0.001）。Cox多因素分析显示，患者总存活率与性别、AFP、肿瘤分化程度、微血管侵犯、肿瘤直径、CNTN-1高表达有显著相关性（P＜0.05~0.001）；患者无复发存活率与TNM分期、包膜完整性、CNTN-1高表达相关（P＜0.05~0.001）。Kaplan-Meier分析显示CNTN-1高表达患者与CNTN-1低表达患者的术后总生存曲线以及术后无复发生存曲线差异有统计学意义（均为P < 0.01），VEGF-C高表达患者与低表达患者仅在术后无复发生存曲线差异有统计学意义（P=0.005）。
      结论  CNTN-1蛋白水平在肝癌组织中高表达，且与VEGF-C的表达相关，与肝癌肝移植术后复发转移有关，影响肝癌肝移植患者预后。

     

    Abstract:
      Objective  To investigate the relationship between contactin (CNTN)-1 and vascular endothelial growth factor (VEGF)-C expression levels and the recurrence, metastasis and prognosis of hepatocellular carcinoma (HCC) patients after liver transplantation.
      Methods  Clinical data and pathological specimen of 105 patients diagnosed with primary HCC undergoing orthotopic liver transplantation were collected. The expression levels of CNTN-1 and VEGF-C in the cancerous and para-cancerous liver tissues were quantitatively measured by immunohistochemical staining. The relationship between the CNTN-1 and VEGF-C expression levels and clinicopathological characteristics, postoperative recurrence, metastasis and prognosis was statistically analyzed.
      Results  The high expression rate of CNTN-1 and VEGF-C in liver cancerous tissues was 46.7% and 39.0%, significantly higher compared with 11.4% and 19.0% in the para-cancerous tissues (both P < 0.05). Spearman correlation analysis revealed that the expression level of CNTN-1 was positively correlated with that of VEGF-C (P < 0.005). χ2 test demonstrated that the expression of CNTN-1 protein was positively correlated with the level of alpha fetoprotein (AFP) (P=0.017), tumor, node, metastasis (TNM) staging (all P < 0.001), and negatively correlated with the degree of differentiation (P < 0.001). High expression of VEGF-C was positively correlated with TNM staging (P < 0.001). Cox multivariate analysis revealed that overall survival rate was significantly correlated with gender, AFP, degree of tumor differentiation, microvascular invasion, tumor diameter and high expression of CNTN-1 (P < 0.05-0.001). The recurrence-free survival was correlated with TNM staging, envelope integrity and high CNTN-1 expression (P < 0.05-0.001). Kaplan-Meier survival analysis revealed that postoperative overall survival curve and recurrence-free survival curve significantly differed between patients with high and low expression levels of CNTN-1 (both P < 0.01). Recurrence-free survival curve significantly differed between patients with high and low expression levels of VEGF-C (P=0.005).
      Conclusions  CNTN-1 protein is highly expressed in HCC tissues and correlated with the expression of VEGF-C. It is associated with postoperative recurrence and metastasis of HCC after liver transplantation and affects the clinical prognosis of patients.

     

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