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JoVE Encyclopedia of Experiments
Cancer Research
机械解离:一种从组织中获得活细胞的方法
机械解离:一种从组织中获得活细胞的方法
Encyclopedia of Experiments
Cancer Research
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Encyclopedia of Experiments Cancer Research
Mechanical Dissociation: A Method to Obtain Viable Cells from a Tissue

机械解离:一种从组织中获得活细胞的方法

Protocol
4,211 Views
05:26 min
April 30, 2023
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Please note that some of the translations on this page are AI generated. Click here for the English version.

Transcript

首先,称量组织碎片并测量其长度、宽度和高度。将组织放入装有培养基的培养皿中,然后用手术刀将其切成小块。将所有物质转移到 C 管中,使用巴斯德移液器进行均质化。

将试管放入机械分离器中,并根据需要运行循环。该装置利用机械力从组织样本中提取活的单细胞,同时保持细胞完整性,包括表面蛋白。通过固定在离心管上的细胞过滤器倒出匀浆。

重新匀浆剩余的组织,并通过细胞过滤器将匀浆过滤到试管中。离心匀浆并去除上清液。现在,将细胞沉淀重悬于培养基中,并将少量细胞悬液转移到含有台盼蓝染色剂的试管中。

染色后,将细胞转移到血细胞计数器载玻片上。计数透明的活细胞。死细胞吸收了染色剂,因为它们的细胞膜不完整。在以下方案中,我们将对新鲜人体组织进行非酶解离,用于 CD45 + 细胞的定量和定性分析。

- 首先称量组织样本,然后测量组织的长度、宽度和高度。然后将组织片段转移到含有 1 毫升适当的化学成分明确、无血清造血细胞培养基的小培养皿中,并使用无菌手术刀将样品切成 1 至 2 平方毫米的小块。接下来,将培养皿内容物转移到机械解离器 C 管中,并用 2 毫升培养基冲洗培养皿和手术刀。

将洗涤液加入 C 管中,然后连续运行 8.01 机械解离器程序两次,以轻轻地将组织片段匀浆成单细胞悬液。第二个循环后,通过 40 微米的细胞过滤器将匀浆倒入 50 毫升锥形管中。然后使用洗涤培养皿中的相同巴斯德移液管将 C 管中残留的任何液体转移到细胞过滤器中。

接下来,使用 1 毫升微量移液器将过滤后的液体转移到 15 毫升锥形管中,然后用另外 3 毫升培养基冲洗 C 管。通过细胞过滤器将洗涤液转移到 50 mL 试管中。然后用干净的 1 毫升吸头轻轻地将未匀浆的组织在过滤器周围移动,以将捕获在组织中的最大量残留液体挤入 50 毫升试管中。现在将细胞过滤器倒置在原始 C 管的顶部,再用 3 毫升培养基冲洗过滤器,使未均质的组织落回 C 管中。

如前所述,将组织再匀浆两个循环,然后再次将第二种匀浆倒入细胞过滤器中。用另外 3 毫升培养基冲洗 C 管。然后通过过滤器过滤上清液,并将残留液体从组织中挤出,如刚才所示。此时,15 毫升试管中应存在约 2.5 mL 的单细胞悬液体积,在 50 mL试管中应观察到约 9 mL

。

为了将组织上清液与细胞分离,首先在室温下以 600 Gs 离心两管匀浆 15 分钟。将 15 毫升试管中的上清液倒入 1.5 毫升试管中,置于 4 摄氏度,然后丢弃 50 毫升试管中的上清液。然后在坚硬的表面上轻轻敲击每根试管,以打碎每个细胞沉淀。

用 500 微升培养基将松散的细胞沉淀重悬于 50 毫升试管中,并将细胞转移到 15 毫升试管中以重悬第二个沉淀。然后用另外 500 μL 培养基冲洗 50 mL 试管,并将洗液转移到 15 mL 试管中,以实现最大的细胞回收率。通过台盼蓝排除法计数活细胞的数量后,沉淀细胞悬液。

最后,旋转保留的组织上清液。然后小心地将上清液转移到至少一个干净的试管中,不要接触或干扰沉淀,并将其储存在零下 80 摄氏度以备将来的下游分析。

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