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JoVE Encyclopedia of Experiments
Neuroscience
产生背根神经节外植体和解离的细胞培养物
产生背根神经节外植体和解离的细胞培养物
Encyclopedia of Experiments
Neuroscience
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Encyclopedia of Experiments Neuroscience
Generating Dorsal Root Ganglion Explant and Dissociated Cell Culture

产生背根神经节外植体和解离的细胞培养物

Protocol
748 Views
04:30 min
July 8, 2025
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Please note that some of the translations on this page are AI generated. Click here for the English version.

Transcript

从无血清培养基中的背根神经节或DRG组织开始。DRG 组织包含嵌入细胞外基质 ECM 中的感觉神经元和卫星神经胶质细胞。

将它们

接种到涂有凝胶状蛋白质混合物的培养皿上,以增强组织粘附力。

随着时间的推移,神经胶质细胞释放神经营养生长因子,允许神经元延伸,建立 DRG 外植体培养物。

要开发解离的细胞培养物,请将这些DRG外植体放入管中。用胶原酶处理它们以降解 ECM,然后用胰蛋白酶处理它们,胰蛋白酶会破坏细胞连接,释放神经元和神经胶质细胞。

加入富含血清的培养基以停止酶促反应。

反复移液内容物以形成单细胞悬浮液,并过滤以去除碎屑。

离

心该细胞悬液并除去含酶的上清液。

将

细胞重悬于神经基底培养基中,并将它们转移到层粘连蛋白包被的板上。

卫星神经胶质细胞和感觉神经元粘附在层粘连蛋白包被的板上,建立解离的细胞培养物。

将每个DRG转移到干燥的玻璃培养皿中。在手术显微镜下,使用刀片清洁并修剪掉仍附着在 DRG 上的多余纤维和结缔组织。DRG 很容易识别为沿着白色脊神经的凸起、透明结构,并且经常在 DRG 周围发现血管。

之后,将清洁后的DRG放入装有冰冷、无血清培养基的新培养皿中。在冰冷的无血清培养基中以 1 比 1 的比例稀释凝胶状蛋白质混合物。然后,将 DRG 离体接种在 12 孔板中,预涂有 10 或 20 微升凝胶状蛋白质混合物,并将它们保持在 37 摄氏度 30 至 60 分钟。

现在,向培养系统中轻轻加入1.5至2毫升无血清培养基,以覆盖整个外植体并将外植体保持在培养条件下。每 72 小时更换一次 DRG 生长培养基。并让 DRG 根据需要增长。

这是一个关键步骤,因为 DRG 使用凝胶状蛋白质混合物锚定在玻璃板上。因此,聚合时间和移液技巧对于避免漂浮至关重要。

在此过程中,将收集的所有DRG放入装有含有胶原酶IV的F12培养基的1.5毫升无菌管中,并在37摄氏度下孵育45分钟。然后,更换含有胶原酶IV的新鲜培养基,并将样品再孵育45分钟。然后,用2毫升含有0.025%胰蛋白酶的F12培养基在37摄氏度下处理外植体30分钟。

胶原酶IV处理后,立即将它们与2毫升含有胎牛血清的F12培养基在37摄氏度下孵育15分钟。然后,用2毫升F12培养基洗涤外植体三次,然后用玻璃移液器机械解离它们,直到培养基变得浑浊。

之后,通过 0.22 微米过滤器过滤解离的细胞培养物,以去除任何杂质和多余的结缔组织。然后,将过滤后的细胞裂解物离心两分钟。除去上清液并将细胞沉淀重悬于 500 微升神经基础培养基中。将解离的细胞以优选的细胞密度置于层粘连蛋白包被的载玻片上。

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