STEMCELL Technologies ImmunoCult ImmunoCult NK Cell Expansion Kit
- 研究用
- 新製品
ImmunoCult™ NK Cell Expansion Kit(ST-100-0711)は、血清や取扱が煩雑なフィーダー細胞を使用せずにヒトNK細胞を増殖させる培地キットです。高収率のNK細胞を得られるように培養条件が最適化されています。わずか14日間の培養後に細胞を回収し、そのまま下流のアプリケーションに使用できます。
本品は使いやすい完全な培養系で、ImmunoCult™ NK Cell Base Medium、ImmunoCult™ NK Cell Expansion Supplement、ImmunoCult™ NK Cell Expansion Coating Materialが含まれています。これらの構成品は個別でも購入いただけます。
上流および下流の実験で用いる多くの製品と適合します。例えば、EasySep™細胞分離キットでNK細胞を分離した後、ImmunoCult™ NK Cell Expansion Kitで増殖できます。
製品の特長
ImmunoCult™ NK Cell Expansion Kitをもちいて、無血清条件下でNK細胞を効率よく拡大培養できます!
- ヒトNK細胞を安定して増幅し、高い収量と純度のNK細胞が得られます
- 血清やフィーダー細胞を使用しません
- 増殖するNK細胞は機能性で、細胞傷害能力を有しています
NK細胞増殖の流れ
Figure 1. ImmunoCult™ NK Cell Expansion Protocol
Human natural killer (NK) cells are isolated from blood or leukapheresis using EasySep™ selection. The NK cells are cultured in ImmunoCult™ NK Cell Expansion Medium, on plates coated with ImmunoCult™ NK Cell Expansion Coating Material. After 3 days, fresh medium is added to the culture. On day 7, and again on day 10 or 11, expanding NK cells are harvested and replated on freshly coated plates. Expanded NK cells were harvested on day 14 for use in downstream assays.
データ紹介
Figure 2. CD56+CD3− NK Cells Expand Over 14 Days in Feeder- and Serum-Free Culture Conditions
Isolated human CD56+CD3− NK cells were cultured using ImmunoCult™ NK Cell Expansion Kit for 14 days (Figure 1). Cells were harvested and analyzed for expression of characteristic NK cells markers, including CD56, CD3, CD16, CD94, KIR, NKG2D, NKp46, NKp30, and NKp44 by flow cytometry. Staining for killer cell immunoglobulin-like receptor (KIR) molecules was performed using two different antibody clones, HP-MA4 and 180704, which recognize distinct KIR molecules. Dead cells were excluded by light-scatter profile and DRAQ7™ staining. (A - H) Representative flow cytometry plots. (I) The average frequencies of viable CD56+CD3− and CD56+CD16+ NK cells on day 14 were 87 ± 1% and 75 ± 2%, respectively. The average fold expansion of CD56+CD3− cells was 89 ± 17. Results shown represent mean ± SEM (n = 34).
Figure 4. Expanded NK Cells Degranulate and Produce Cytokines After Stimulation
Isolated CD56+CD3− NK cells were expanded for 14 days (Figure 1). Expanded NK cells were left unstimulated (control) or were stimulated with either phorbol 12-myristate 13-acetate (PMA) and ionomycin or K562 cells at a ratio of 1:1 effector:target cells. CD107a antibody was added, and cultures were incubated at 37°C for 4 hours. After the first hour, Monensin and Brefeldin A were added. Cells were assessed for surface CD56, CD107a, and intracellular IFN-γ and TNF-α expression by flow cytometry. (A-C) Representative histograms of CD107a, IFN-γ, and TNF-α expression of unstimulated (grey filled), PMA and ionomycin-stimulated (orange), and K562-stimulated (purple) NK cell samples. (D) The average frequency of NK cells expressing surface CD107a, a marker of degranulation, was 23 ± 5% for the unstimulated control, 88 ± 5% after stimulation with PMA and ionomycin, and 74 ± 6% after stimulation with K562 cells. (E) The average frequency of NK cells expressing intracellular IFN-γ was 10 ± 2% for the unstimulated control, 75 ± 4% for cells stimulated with PMA and ionomycin, and 48 ± 4% for cells co-cultured with K562 cells. (F) The average frequency of NK cells expressing intracellular TNF-α was 6 ± 4% for the unstimulated control, 85 ± 1% cells stimulated with PMA and ionomycin, and 45 ± 4% for cells co-cultured with K562 cells. Data represent mean ± SEM (n = 6 - 13).