| 背景描述 | CD28,is a ligand for B7-1 (CD80) and B7-2 (CD86), a well-known co-stimμLatory receptor expressed on T cells. CD28 is a type I transmembrane glycoprotein of the Ig superfamily. When the T cells receive the first signal delivered by APCs (antigen-presenting cells), it initiates signaling cascades, which favor T cell survival and proliferation. It has been demonstrated that patients with lung cancer who responded to PD-1 therapy had more CD28+ T cells, suggesting that CD28 may predict treatment response. |
| 别称 | T-cell-specific surface glycoprotein CD28 |
| 内毒素检测 | <0.01 EU per 1 μg of the protein by the LAL method. |
| 产品形式 | Liquid |
| 产品应用 | FC, FA, IHC, IP Note: It is recommended that the reagent be titrated for optimal performance for each application. |
| 反应性 | Human |
| 克隆性 | Monoclonal, clone CD28.2 |
| 浓度 | 2 mg/mL |
| 纯化方式 | Affinity Chromatography |
| 标记 | Unconjugated |
| 产品组成 | Phosphate-buffered aqueous solution, pH7.2, sodium azide-free |
| 亚型 | Mouse IgG1, kappa |
1. 配置anti-CD3功能性抗体
用PBS稀释配置anti-CD3功能性抗体,浓度为1-5 μg/mL。根据需要选择并计算所需抗体的量。2. 抗体铺板
用稀释后的anti-CD3功能性抗体铺板:
▪ 96孔板:每孔加入50 μL
▪ 6孔板:每孔加入500 μL
37℃ 2h或者4℃过夜(过夜包被效果比较好)。
3. 洗涤
加入细胞前吸去孔内抗体溶液,加入PBS(96孔板200 μL,6孔板2 mL)洗涤2次,去除未结合抗体。4. 准备细胞
取外周血PBMC(步骤省略),也可用分选的T淋巴细胞(也可选择在细胞刺激增殖后进行分选)5. 细胞接种
PBS洗涤细胞1次,用含有以下成分的完全培养基重悬细胞,加入培养板内:
▪ anti-CD28(1-2 μg/mL)
▪ IL-2(10-50 ng/mL)
细胞接种密度:
▪ 96孔板:每孔加入3×105个细胞
▪ 6孔板:每孔加入2-5×106个细胞
6. 细胞培养与观察
培养过程中隔天换液,进行细胞计数并观察细胞状态。
说明:以上CD3和CD28抗体的浓度,可根据自己的需求进行选择,如果培养时间短,希望有很强的活化作用可以适当提高浓度,反之,可降低浓度。虽然高浓度诱导活化能力强,但其诱导凋亡的作用也很明显。
| 储存 | The product should be stored undiluted at 2-8°C and protected from prolonged exposure to light. Do not freeze. |
| 运输 | Blue Ice |
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