采用Naïve CD4 T无柱式分选试剂盒,从小鼠脾细胞中富集Naïve CD4 T细胞。使用CD4-Pacific Blue、CD44-FITC、CD62L-Alexa Fluor® 647荧光抗体进行染色,以活细胞(Live+)设门进行分析, 检测分选组分中Naïve CD4 T细胞(CD4+CD44-CD62L+)的比例;流式细胞术检测结果表明,本次分选后Naïve CD4 T细胞纯度为95.5%。
Product Details
Product Details
Product Specification
| Format |
1 mL Mouse Naïve CD4 T Cell Biotin-Antibody Cocktail 1mL Streptavidin Beads |
| Capacity | Suitable for a total cell count of 1×10⁹, and can perform up to 100 sorting runs. |
| Principle of Separation | In this negative selection process, non-target cells are labeled with biotin-conjugated antibodies, and the cells are then incubated with streptavidin-nanomagnetic beads. The non-target cells are marked by the antibody‑bead complex, while the targetNaïve CD4 Tcells remain unlabeled. Subsequently, the cell suspension is transferred to a polystyrene tube and placed within the sorter's magnetic field. Under the influence of the magnetic field, the magnetically labeled non-target cells adhere to the tube wall, whereas the unlabeledNaïve CD4 Tcells remain in the supernatant. This supernatant constitutes theNaïve CD4 Tcell-enriched fraction after removal of the non-target cells.Naïve CD4 Tcell fraction. |
| Applications in cell sorting | Naïve CD4 T cells in their native, unmanipulated state are sorted from a single-cell suspension of fresh mouse spleen and can be used for a variety of downstream functional assays. |
| Reactivity | Mouse |
| Magnetic Bead Size | 150 nm |
| Separation Method | Column-Free |
| Selection Strategy | Negative Selection |
| Stability & Storage | 避光保存于 2–8 ℃,不可冻存。 |
Background
Mouse Naive CD4⁺ T 细胞(初始 CD4 阳性 T 淋巴细胞),是尚未接触特异性抗原、未发生活化增殖分化的成熟 CD4⁺T 细胞。流式细胞术经典界定表型为CD4⁺CD44⁻CD62L⁺,CD62L(L-selectin)是淋巴结归巢关键受体,特异性高表达于静息初始T细胞,细胞活化或受机械、温度应激时会被ADAM17金属蛋白酶快速剪切脱落;CD44为活化与记忆T细胞标志性黏附分子,静息Naive CD4⁺T细胞几乎不表达。基于该特征,可精准区分初始T细胞(CD44⁻CD62L⁺)、中央记忆T细胞(CD44⁺CD62L⁺)与效应记忆T细胞(CD44⁺CD62L⁻)。细胞纯度是Naive CD4⁺T细胞功能实验的核心前提,本试剂盒采用免疫磁珠阴性分选技术,通过生物素化抗体特异性标记B细胞、CD8⁺T细胞、髓系细胞、活化/记忆T细胞等非目标杂细胞,结合链霉亲和素磁珠特异性去除杂细胞,全程不标记、不接触目标Naive CD4⁺T细胞,最大程度保留细胞静息表型、活性与分化潜能,可高效获得高纯度、高活性、未活化的Untouched Naive CD4⁺T细胞,适配体外极化培养、细胞活化检测、免疫机制研究等各类实验场景。
Components
Protocol
步骤 |
操作说明 |
剂量和时间 |
1 |
取小鼠脾脏,置于40 μm无菌滤网上研磨,制备脾脏单细胞悬液,使用红细胞裂解液Red Blood Cell Lysis Buffer (不含固定剂,1X)(Cat:S0D9002)裂红处理后进行细胞计数; Note:研磨、过滤、洗涤全程使用预冷试剂,动作轻柔,禁止强力涡旋;推荐细胞采用 AO/PI 染色后进行计数;脾细胞可以采用400 g离心7 min; |
制备样本 |
2 |
用预冷的100μL MagSep Separation Buffer重悬1×107细胞; Note:试剂根据样品体积等比例调整;留分选前样本检测Naïve CD4比例; |
1×107 cells/100 μL |
3 |
加入10 μL Mouse Naïve CD4 T cell Biotin Antibody Cocktail 至样品中,轻轻混匀; Note: 本步骤混匀可采用移液器轻轻吹匀2-3下; |
10 μL /100 μL |
4 |
Cocktail中的抗体和细胞进行孵育, 2-8℃孵育10 min; |
2-8℃孵育10 min |
5 |
震荡5-30 s,混匀Streptavidin beads; |
混匀5-30 s |
6 |
加10 μL Streptavidin beads至样品中; |
10 μL/100 μL |
7 |
轻柔混匀磁珠和细胞,2-8℃孵育5min; Note: 本步骤混匀可采用移液器轻轻吹匀2-3 下; 本步骤磁珠会出现沉底的情况,可以在2.5min时,轻弹混匀一下; |
2-8℃孵育5min |
8 |
加预冷的MagSep Separation Buffer到样品中,立即放置在磁极上,防止磁珠大量沉底; |
总体积加至2.5 mL(5 mL流式管) 总体积加至7.5 mL(15 mL离心管) |
9 |
样品置于磁极上,使磁珠吸附在管壁上; |
单孔磁力架吸附(3 min) 联排磁力架吸附(5 min) |
10 |
倾斜磁力架,将样品倒入新的收集管中,收集样品; Note: 分选的细胞可采用400g离心7min,用于后续培养和分析。 |
细胞分选成功 |
|
Note: 1. 0.1-1 × 108 cells(0.1-1mL)推荐使用5 mL单孔磁极(Starter EasyIso Separator)吸附总体积为2.5mL; 2-5 ×108 cells(2-5mL)推荐使用15 mL联排磁极(Starter EasyEights EasyIso Separator)吸附总体积为7.5mL; 2. 全程注意控制温度,分选Buffer全程预冷,分选完后立即进行后续实验,流式检测2-8℃避光染色,避免室温长时间放置。 | ||
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Validation Data
