http://www.liankebio.com/article-information_Tech-1543.html
作者:联科生物 发布日期:2013-11-12 13:00
流式检测中,很多因素影响到实验的稳定性,数据表明,有三分之一的流式结果因为没有对样本处理进行优化,而需要重复以获得可靠的结果。这些优化的过程包括:FcR阻断、死活细胞鉴定、补偿调节标准化、红细胞裂解效果等。
一、FcR阻断
Fc受体是指细胞表面能够与免疫球蛋白(IgG、IgA、IgM、IgE和IgD)结合的分子。其广泛存在于NK细胞、肥大细胞、巨噬细胞、中性粒细胞的表面。
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Fig1:FcR的种类及分布 |
FcR能够与抗体的Fc段结合,在检测时产生假阳性。
使用FcR阻断剂,可以消除假阳性,降低检测背景,获得更清晰的结果。
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相关产品:
eBioscience
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85-14-9161-71
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Human Fc Receptor Binding Inhibitor Purified
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25 tests
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eBioscience
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85-14-9161-73
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Human Fc Receptor Binding Inhibitor Purified
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100 tests
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eBioscience
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85-14-0161-81
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Anti-Mouse CD16/CD32 Purified
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50 ug
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eBioscience
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85-14-0161-82
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Anti-Mouse CD16/CD32 Purified
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100 ug
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eBioscience
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85-14-0161-85
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Anti-Mouse CD16/CD32 Purified
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500 ug
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eBioscience
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85-14-0161-86
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Anti-Mouse CD16/CD32 Purified
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1 mg
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Liankebio
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AM1632-050
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Anti-Mouse CD16/32(FcR inhibitor)
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50T
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Liankebio
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AM1632-100
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Anti-Mouse CD16/32(FcR inhibitor)
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100T
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二、细胞活力染料/死活细胞鉴定
死细胞同样会与抗体产生非特异性结合,造成检测的背景。
通常情况,会使用PI或者7-AAD来对死细胞进行染色,但是它们对核酸的结合不够稳定,洗涤会造成假阴性的结果;而且,这两种染料的光谱都非常宽,补偿难以调节,所以在多色检测、尤其是胞内染色时,需要用到可固定的细胞活力染料(Fixable Viability Dye)。
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激发/发射光 |
优势 |
劣势 |
Fixable Viability Dye |
Violet / 450 nm |
多种颜色选择 |
价格稍贵 |
Violet / 506 nm |
不可逆,可固定后检测 |
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Red / 660 nm |
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Red / 780 nm |
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7-AAD |
Red / 647 nm |
经济 |
不能用于胞内染色样品的死细胞鉴定 |
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补偿难以调节 |
PI |
Red / 617 nm |
经济 |
不能用于胞内染色样品的死细胞鉴定 |
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补偿难以调节 |
相关产品:
Liankebio
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AP101-100-PI
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PI solution
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100T
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Liankebio
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AP104-100-AAD
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7-AAD
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100T
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ebioscience
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85-65-0863-14
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Fixable Viability Dye eFluor 450
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100 tests
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ebioscience
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85-65-0863-18
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Fixable Viability Dye eFluor 450
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500 tests
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ebioscience
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85-65-0864-14
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Fixable Viability Dye eFluor660
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100 tests
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ebioscience
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85-65-0864-18
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Fixable Viability Dye eFluor 660
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500 tests
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ebioscience
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85-65-0865-14
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Fixable Viability Dye eFluor780
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100 tests
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ebioscience
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85-65-0865-18
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Fixable Viability Dye eFluor780
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500 tests
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ebioscience
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85-65-0866-14
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Fixable Viability Dye eFluor 506
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100 tests
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ebioscience
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85-65-0866-18
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Fixable Viability Dye eFluor506
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500 tests
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ebioscience
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85-65-2860-40
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Fixable Viability Dye eFluor 506/780 Sample Pack Kit
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Kit
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三、补偿调节微球
合适的补偿调节是获得准确实验结果的前提,某些表达较低的指标,无法用单染的方法进行补偿调节,此时就需要使用补偿微球。相关产品:
eBioscience
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85-01-1111-41
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OneComp eBeads
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25 tests
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ebioscience
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85-01-1111-42
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OneComp eBeads
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100 tests
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eBioscience
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85-01-2222-41
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UltraComp eBeads
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25 tests
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eBioscience
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85-01-2222-42
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UltraComp eBeads
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100 tests
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优点1:——无需另外调整设置,直接上样即可
UltraComp eBeads更适合紫光激发的荧光抗体
脾细胞 |
UltraComp eBeads |
某知名竞争品牌 |
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Fig3:其他厂家的微球都需要再次调整 |
优点2 ——能与各种种属和亚型的抗体反映
Product
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Species Compatibility
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Chain Recognition
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Features
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Mouse Ig
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Rat Ig
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Hamster Ig
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Rabbit Ig
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Kappa Light Chain
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Lambda Light Chain
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One Drop
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One Vial
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All cell sizes
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UltraComp eBeads
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√
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√
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√
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√※
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√
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√
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√
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√
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√
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OneComp eBeads
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√
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√
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√
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√※
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√
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√
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√
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√
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√
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Competitor Anti-Mouse Ig, k
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√
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√
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Competitor Anti-Rat Ig, k
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√
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√
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Competitor Anti-Rat/Hamster Ig, k
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√
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√
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√
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Competitor PlusAnti-Mouse Ig, k
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√
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√
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Competitor PlusAnti-Rat Ig, k
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√
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√
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Competitor Anti-Mouse Bead Kit
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√
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√
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√
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Competitor Anti- Rat/Hamster Bead Kit
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√
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√
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√
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√
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Competitor AntibodyCapture Bead Kit
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√
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√
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√
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√※
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竞争品牌的微球是分种属的,使用不同抗体要购买多个产品以使用
注:兔来源的抗体与微球结合力较弱,但某些还是可以使用
优点3 ——适应各种孵育时间,结果稳定 |
优点4 ——价格相当,有小包装 |
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Product |
Tests |
OneComp eBeads |
25/100 |
UltraComp eBeads |
25/100 |
Competitor antibody capture kit |
100 |
Competitor Anti-Mouse Ig, k |
100 |
Competitor Anti-Rat Ig, k |
100 |
Competitor Anti-Rat/Hamster Ig, k |
100 |
Competitor Plus Anti-Mouse Ig, k |
100 |
Competitor Plus Anti-Rat Ig, k |
100 |
Competitor Anti-Mouse Bead Kit |
100 |
Competitor Anti-Rat/Hamster Bead Kit |
100 |
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四、溶血素(红细胞裂解液)
由于各个公司的流式细胞仪光路设置不同,所以要根据机器厂商来选择合适的溶血素产品,才能获得良好的细胞分群,准确的选取要分析的细胞。
相关产品:
LSC01/02
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FCM Lysing solution for BC (ready-to-use)
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100T/250T
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含固定剂,适用于Beckman Coulter 流式细胞仪
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LSB01/02/03
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Lysing solution for FACS 10×
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100T/250T/500T
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含固定剂,适用于BD 流式细胞仪
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LYS01/02/03
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FCM Lysing solution (Fixative Free) 10×
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100T/250T/500T
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不含固定剂,适用于染色前溶血或间标流式
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五、流式染色缓冲液
流式染色缓冲液中通常含有BSA或者FBS/FCS等成分,可以有效降低染色过程中的非特异性结合。
特点:
1、使用方便 即用型
2、有效降低非特异性结合
3、适用于各种流式实验
相关产品:
ebioscience
|
85-00-4222-57
|
Flow Cytometry Staining Buffer
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200 mL
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ebioscience
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85-00-4222-26
|
Flow Cytometry Staining Buffer
|
600 mL
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Liankebio
|
S1001
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Flow cytometry Staining buffer
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125ml
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