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JoVE Encyclopedia of Experiments
Immunology
来自外周血单核细胞的自然杀伤细胞的离体扩增
来自外周血单核细胞的自然杀伤细胞的离体扩增
Encyclopedia of Experiments
Immunology
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Encyclopedia of Experiments Immunology
Ex Vivo Expansion of Natural Killer Cells from Peripheral Blood Mononuclear Cells

来自外周血单核细胞的自然杀伤细胞的离体扩增

Protocol
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03:14 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

自然杀伤细胞 NK 是消除肿瘤和微生物感染的大颗粒淋巴细胞。

对于离体NK细胞扩增,取外周血单核细胞(PBMC)悬浮液,其中含有异质淋巴细胞群,包括NK细胞。添加辐照的饲养细胞(非增殖淋巴母细胞样细胞),这些细胞表达激活和扩增 NK 细胞所需的膜结合白细胞介素 21 (mIL-21)。

将

共培养物添加到底部有透气膜的专用培养孔中,允许气体交换。细胞在不需要传代的情况下长时间沉降和增殖。

添加白细胞介素 2、IL-2 和白细胞介素 15、IL-15 — 用于 NK 细胞增殖的细胞因子。在生理条件下孵育足够的时间。

饲养层细胞上的 mIL-21 与 NK 细胞上的特定异二聚体受体结合。外源性 IL-15 和 IL-2 与各自的受体结合。这种结合诱导不同的下游信号通路——激活基因表达——限制细胞衰老并导致延长 NK 细胞增殖。

使用流式细胞术,定期评估NK细胞扩增。

绘制

记录的数据以分析细胞的扩增速率及其纯度 - 目标 NK 细胞类型的选择性生长。孵育期内的流形膨胀表明在保持高纯度的同时持续增殖。

用

10毫升R-10培养基以400g离心5分钟,分别洗涤外周血单核细胞或PBMC和100个γ射线照射的221-mIL-21细胞。

离心后,保存 1 x 106 PBMC 用于流式细胞术,并将 5 x 106 PBMC 与 10 x 106 100 γ 射线照射的 221-mIL-21 细胞混合在特殊的 6 孔板中。将30毫升补充有人白细胞介素-2和人白细胞介素-15的R-10培养基加入同一6孔板中,并将板与5%二氧化碳在37摄氏度下孵育,每三到四天更换一次培养基。

在孵育期间,记录外周血自然杀伤总数或PBNK细胞数量、活力,并每三到四天进行一次流式细胞术以计算NK细胞扩增率。

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