国家自然科学基金(30330240、30125013、30371772)、广东省自然科学基金重点项目(37047)、教育部长江学者奖励计划资助项目.
This work was supported by grants from The National Natural Science Foundation of China (30330240,30125013,30371772), The Natural Science Foundation of Guangdong Province (37047), Cheung King Scholars Programme to TM Gao.
为了建立一种能够获得高纯度成年大鼠海马神经前体细胞 (HPCs) 的体外贴壁培养方法,并鉴定 HPCs 上是否存在功能性 L- 型钙通道,分离 Wistar 成年大鼠海马组织,制成单细胞悬液,利用无血清培养技术,在添加碱性成纤维细胞生长因子 (bFGF) 、表皮生长因子 (EGF) 、 N2 和 B27 supplement 的 DMEM/F12 培养液中进行培养 . 连续传代,采用细胞免疫荧光法对第六代细胞进行鉴定,呈巢蛋白 (nestin) 阳性的细胞可达 99.9 % . 把培养高纯度的细胞在分化培养基中诱导分化 14 天后,表现为神经元和星形胶质细胞的形态,且分别呈Ⅲ型β-微管蛋白 (Tuj1) 阳性和胶质纤维酸性蛋白 (GFAP) 阳性 . 细胞免疫荧光和免疫印迹结果显示, HPCs 表达 L- 型钙通道的 Cav1.2α1C 和 Cav1.3α1D 亚单位,共聚焦钙成像证明了功能性 L- 型钙通道的存在,并且利用全细胞膜片钳技术记录到了 L- 型钙电流 . 以上结果表明成年 Wistar 大鼠的海马 HPCs 可表达功能性的 L- 型钙通道 .
In order to establish an in vitro attachment culture method for obtaining highly purified neural progenitor cells (HPCs) from the hippocampus of adult Wistar rats and to identify functional L-type calcium channels in those cells, the adult rat hippocampal tissue was dispersed into a single cell suspension, and the dissociated cells were cultured in serum-free DMEM/F12 medium containing epidermal growth factor (EGF), basic fibroblast growth factor (bFGF), N2 and B27 supplement. After six passages, the proportion of nestin-positive cells reached to 99.9%. Following fourteen-days culture in differentiation medium, neuron-like and astrocyte-like cells were observed, which expressed β-tubulin Ⅲ (Tuj1) and glial fibrillary acidic protein (GFAP), respectively. Immunofluorescent double labeling and Western blot showed an expression of Cav1.2α1C and Cav1.3α1D subunits in HPCs, and functional L-type calcium channels were confirmed by confocal microscopic Ca2+ imaging. Moreover, L-type calcium channel currents were recorded in those cells by using whole-cell patch clamp techniques. The results indicated that adult rat HPCs express functional L-type calcium channels.
冯锦丽,胡德辉,陈 明,田映红,施志敏,杨建明,朱心红,李晓文,高天明.成年大鼠海马神经前体细胞表达功能性的 L-型钙通道[J].生物化学与生物物理进展,2005,32(9):822-828
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