白细胞介素-33和血管内皮生长因子C在胃癌中的表达及临床意义

摘要

Objective To investigate the expression of interleukin-33(IL-33)and vascular endothelial growth factor C(VEGF-C)in gastric cancer tissues and serum,and to explore the relationship between these two indicators and gastric cancer lymph node metastasis.Methods The levels of IL-33 and VEGF-C in the tissues of gastric mucosa and serum were detected by immunohistochemical SP method and enzyme-linked immunosorbent assay(ELISA)in 98 patients with gastric cancer and 36 healthy subjects.Results The expression rates of IL-33 and VEGF-C in gastric cancer were 67.35％and 74.49％,which were significantly higher than the rates in normal gastric tissue(47.22％and 61.11％).The difference was statistically significant(P<0.01).The expression of IL-33 and VEGF-C was correlated with the degree of tumor differentiation,tissue infiltration,lymph node metastasis,distant metastasis and clinical stage(P<0.05).The positive rates of IL-33 and VEGF-C in gastric cancer lymph node metastasis group were higher than those in non-lymph node metastasis group(P<0.05).The serum concentrations of IL-33 and VEGF-C in patients with gastric cancer were(50.24±13.08)pg/mL and(210.73±58.35)pg/mL,respectively,which were higher than those in healthy control group(P<0.05);the expressions of serum concentration of IL-33 and VEGF-C in the cases with lymph node metastasis were higher than those without lymph node metastasis and the difference was statistically significant(P<0.05).Conclusion High levels of IL-33 in gastric carcinoma patients might induce the secretion of VEGF-C,promote lymph node metastasis,and be applied as an important index of the appraisal to the prognosis of gastric cancer.%目的 探讨白细胞介素-33(IL-33)和血管内皮生长因子C(VEGF-C)在胃癌患者组织标本及血清中表达,以及二者与胃癌淋巴结转移的关系.方法 分别应用免疫组织化学SP法和酶联免疫双抗夹心法(ELISA)检测98例胃癌患者和36名健康体检者胃黏膜组织标本及血清中IL-33和VEGF-C水平.结果 胃癌组织中IL-33和VEGF-C的阳性表达率分别为67.35％和74.49％,显著高于正常胃组织(47.22％和61.11％),比较差异有统计学意义(P<0.01).IL-33和VEGF-C表达在不同的肿瘤分化程度、组织浸润、淋巴结转移、远处转移及临床分期间比较差异有统计学意义(P<0.05).胃癌淋巴结转移患者的IL-33和VEGF-C的表达阳性率高于未发生淋巴结转移患者(P<0.05).胃癌患者血清IL-33和VEGF-C水平为(50.24±13.08)pg/mL和(210.73±58.35)pg/mL,高于健康体检者(P<0.05);淋巴结转移患者血清IL-33和VEGF-C水平高于未发生淋巴结转移患者,比较差异有统计学意义(P<0.05).结论 胃癌患者血清中高水平IL-33可能诱导VEGF-C分泌,促进胃癌淋巴结转移,可作为评估胃癌预后的重要指标.