摘要:
Objective To study the expression of type Ⅳ collagenase in human gliomtissue, and the effectof type Ⅳ collagenase on proliferation, migration and invasion of Gliomcells, so ato provide basifoclinical treatment.MethodWestern blotting waused to compare the contenof type Ⅳ collagenase between malignanGliomtissueand normal tissues.Gliomcell C6 were divided into three groups, respectively added with cell culture medium (control group), type Ⅳ collagenase (study group),type Ⅳ collagenase and specifiinhibito(inhibitogroup).Use the methyl thiazol tetrazolium (MTT) assay, transwell migration and invasion assay to observe the effectof type Ⅳ collagenase on proliferation,migration and invasion of Gliomcells.ResultThe expression rate of type Ⅳ collagenase in malignangliomtissue(87.5%) ihighethan iin normal tissue(20.0%).There wasignificandifference in relative absorption ratio between two group(0.81 ±0.12 vs.0.04 ±0.01 ,P <0.01).The resulof MTassay indicate the cell proliferation ability of the three grouphave no statistical significance aevery point.The cell counin migration assary of study group (137.49 ± 14.53) wasignificantly more than control group (65.35 ±6.57, P<0.01) and inhibitogroup (67.42 ±7.92, P<0.01).Similarly, the cell counin invasion assary of study group (33.67 ± 7.47) wasignificantly more than control group (20.45±4.89, P<0.01) and inhibitogroup (21.67±5.83, P<0.01)Conclusion The contenand the expression rate of type Ⅳ collagenase in MalignanGliomtissueihighethan iin normal tissues.Type Ⅳ collagenase promotecell migration and invasion, and could be blocked by specifiinhibitor, providing new wayin the treatmenof malignanglioma.%目的 观察Ⅳ型胶原酶在人脑胶质瘤组织中的表达及其对C6胶质瘤细胞增殖、迁移及侵袭的作用.方法 利用Western blot法比较人脑胶质瘤组织和正常组织中Ⅳ型胶原酶的表达量及含量,将体外培养的C6胶质瘤细胞分为3组,分别加入正常培养液(对照组)、Ⅳ型胶原酶(实验组)及Ⅳ型胶原酶+抑制剂GM6001(抑制组),采用噻唑蓝(MTT)实验、细胞迁移实验和细胞侵袭实验,观察Ⅳ型胶原酶对C6胶质瘤细胞增殖、迁移及侵袭的作用.结果 胶质瘤组织中Ⅳ型胶原酶的含量(87.5%)显著高于正常脑组织(20.0%).吸光度比值半定量分析结果两组间差异也有统计学意义(0.81 ±0.12比0.04±0.01,P<0.01).MTT实验显示实验组、对照组和抑制组3组细胞各个时间点吸光度差异无统计学意义(P>0.05),3组迁移细胞数目分别为(137.49±14.53)、(65.35 ±6.57)、(67.42±7.92)个,实验组同对照组和抑制组差异均有统计学意义(P<0.05),3组侵袭细胞数目分别为(33.67±7.47)、(20.45 ±4.89)、(21.67 ±5.83)个,实验组同对照组和抑制组差异均有统计学意义(P<0.05).结论 Ⅳ型胶原酶在人脑胶质瘤组织中表达率及含量明显增高,对于体外培养的大鼠C6胶质瘤细胞,Ⅳ型胶原酶可显著促进其迁移和侵袭,并通过添加抑制剂GM6001后可有效逆转其迁移和侵袭趋势.