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作 者:田有勇[1] 孙圣刚[1] 王家宁[2] 汤翠菊[3] 王岚[1] 冯媛[1] 陈小武[1] 张振涛[1]
机构地区:[1]华中科技大学同济医学院附属协和医院神经内科,武汉市430022 [2]郧阳医学院附属人民医院临床医学研究所 [3]华中科技大学同济医学院附属同济医院肿瘤科
出 处:《中华老年医学杂志》2007年第2期140-144,共5页Chinese Journal of Geriatrics
摘 要:目的探讨血管内皮生长因子(VEGF)基因转移对6-羟多巴胺(6-OHDA)诱导的多巴胺能细胞损伤的保护作用。方法用腺病毒载体携带VEGF165基因(Ad-VEGF165)感染PC12细胞,并设腺病毒携带的β-半乳糖苷酶基因(Ad-LacZ)感染组和磷酸盐缓冲液(PBS)处理组作对照,基因转移成功后,用6-OHDA处理细胞,另设正常对照(不加6—0HDA)。四甲基偶氮唑盐法(MTT)测定细胞活性,免疫荧光细胞化学法检测细胞酪氨酸羟化酶(TH)表达,高效液相色谱检测细胞分泌功能。结果Ad-VEGF165感染组细胞吸光度A570(0.31±0.07),高于Ad-LacZ感染组(0.15±0.07)和PBS处理组(0.13±0.05),但低于正常对照组(0.55±0.10),分别与各组比较,差异均有统计学意义(均为P<0.01);免疫荧光染色显示Ad-VEGF组细胞胞浆平均荧光强度(86.75±21.62)高于Ad-LacZ组(51.53±17.49)及PBS组(54.19±15.82),但低于正常对照组(110.39±24.21),分别与各组比较,差异均有统计学意义(均为(P<0.05);Ad-VEGF感染组细胞培养液中多巴胺和去甲肾上腺素含量也高于Ad-LacZ感染组和PBS处理组。结论腺病毒介导的VEGF基因转移对6-OHDA诱导的多巴胺能细胞损伤具有保护作用。Objective To explore the protective effect of vascular endothelial growth factor165 (VEGF165) gene transfer on dopaminergic cells against 6-hydroxydopamine-induced degeneration. Methods Adenovirus vector carrying the gene of VEGF165 (Ad-VEGF165) was used to infect PC12 cells, and groups of adenovirus vector carrying β-galactosidae gene (Ad-LacZ) and phosphate buffered solution (PBS) were set for controls, and then the cells were exposed to 6-hydroxydopamine (6-OHDA) as the cell model of Parkinson disease. Methyhhiazolyl tetrazolium (MTT) and immunofluorescence-cytochemistry were used to assay the viability of PC12 cell and the expressions of the tyrosine hydroxylase ( TH ) respectively. The high performance liquid chromatography (HPLC-ECD) were performed to detect the secretion function of the PC12 cells. Results MTT showed that the cell absorbance A570 of Ad-VEGF165 group (0.31 ±0. 07) was higher than that of Ad-LacZ group (0. 15±0. 07) and PBS group (0.13±0.05), but lower than that of normal control (0. 55±0.10) (all P〈 0. 01) ; TH immunofluorescence showed that the mean fluorescence intensity in the A&VEGF group (86.75±21.62) was higher than that of Ad-LacZ group (51.53±17.49) and PBS group (54. 19±15.82), but lower than that of normal control (110. 39±24.21) (all P〈0. 05). HPLC-ECD showed that the levels of dopamine and noradrenaline in the culture fluid of Ad-VEGF165 group were higher than those of Ad-LacZ group and PBS group. Conclusions Gene transfer of Ad-VEGF165 has a protective effect on dopaminergic cells against 6-hydroxydopamine-induced degeneration.
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