IGF-Ⅱ和HGF mRNA表达与胃癌微血管密度的关系

目的　探讨胰岛素样生长因子 Ⅱ (IGF Ⅱ )和肝细胞生长因子 (HGF)mRNA在胃癌组织中的表达及其与肿瘤微血管密度 (MVD)、侵袭、脉管侵犯、转移及预后的关系。方法　应用原位杂交和免疫组织化学方法 ,检测 10 5例胃癌组织中IGF Ⅱ和HGFmRNA及CD34的表达。结果　IGF Ⅱ和HGFmRNA在胃癌中的阳性表达率分别为 4 9.5 %和 5 7.1%。胃癌的侵袭深度、脉管侵犯、淋巴结及远处转移均与IGF Ⅱ和HGFmRNA的表达水平有关 (P均 <0 .0 5 )。乳头状腺癌MVD为 (30 .71± 14 .4 5 )个 / 0 .72mm2 ,均低于其他肿瘤类型 ;T3和T4期、脉管侵犯、有淋巴结及远处转移胃癌患者的MVD分别为 (45 .6 4± 11.6 9)、(44 .6 8± 12 .33)、(45 .6 2± 11.6 9)和 (5 1.6 9± 5 .2 1)个 / 0 .72mm2 ,分别比T1和T2期、无脉管侵犯、无淋巴结转移和无远处转移的胃癌患者高。IGF Ⅱ和HGFmRNA表达阳性患者的MVD分别为 (43.0 1± 13.5 8)和 (44 .30± 13.31)个 / 0 .72mm2 ,分别高于表达阴性的患者 (35 .92±14 .6 2 )和 (32 .94± 13.5 4 )个 / 0 .72mm2 ];MVD分别与IGF Ⅱ和HGFmRNA的表达水平呈正相关 (rs 分别为 0 .2 2 2和 0 .399)。IGF Ⅱ和HGFmRNA表达阳性及MVD值≥ 39.5个 / 0 .72mm2 患者的平均生存时间及 5年生存率均低于表达阴性及MVD

mRNA expression of IGF-IIand HGF in relation to microvascular density, tumor progression and prognosis of gastric carcinoma

OBJECTIVE: To investigate whether correlation exists between mRNA expression of IGF-II and hepatocyte growth factor (HGF) and tumor progression and prognosis in gastric cancer. METHODS: In situ hybridization technique was used to examine mRNA expression of IGF-II and HGF, and immunohistochemical technique was used to examine protein expression of CD34 in 105 specimens of gastric carcinoma. RESULTS: In situ hybridization revealed that the positive rates of IGF-II mRNA and HGFmRNA were 49.5% and 57.1%, respectively. In stage T3-T4 cases, positive mRNA expression rates of IGF-II and HGF, the frequencies of vessel invasion, lymph node metastasis and distant metastasis were significantly higher than those in stage T1-T2 cases. The mean microvascular density (MVD) in stage T3-T4 tumors, vessel invasion, lymph node metastasis and distant metastasis were significantly more frequent than those in stage T1-T2 tumors. The mean MVD in tumors with positive IGF-II and HGF expressions was significantly higher than that in tumors without IGF-II and HGF expression. There were positive correlations between MVD and expression of IGF-II and HGF. The mean survival time and 5-year survival rate in cases with positive IGF-II and HGF expression and MVD value > or = 39.5 were significantly shorter those that in cases with negative IGF-II and HGF expression and MVD value < 39.5. CONCLUSION: IGF-II and HGF promote angiogenesis in gastric cancer, and take part in tumor invasion and metastasis. They can be used as prognostic markers of gastric cancer in clinical practice.