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FITC膜联蛋白V细胞凋亡检测试剂盒(BD Pharmingen)
型    号:556547
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FITC膜联蛋白V细胞凋亡检测试剂盒(BD Pharmingen)

FITC膜联蛋白V细胞凋亡检测试剂盒(BD Pharmingen)产品概述:

FITC膜联蛋白V细胞凋亡检测试剂盒(BD Pharmingen)描述

凋亡是在胚胎发育过程中发生的正常生理过程以及组织稳态的维持。凋亡程序的特征是某些形态学特征,包括质膜不对称和附着,细胞质和细胞核的缩合以及DNA的核小体间裂解。质膜的损失是zui早的特征之一。在凋亡细胞中,膜磷脂磷脂酰丝氨酸(PS)从质膜的内部和外部叶片转位,从而将PS暴露于外部细胞环境。膜联蛋白V是一种35-36 kDa的Ca2 +依赖性磷脂结合蛋白,对PS具有高亲和力,并与暴露的PS结合细胞。膜联蛋白V可以与包括FITC的荧光染料缀合。该格式保留了对PS的高亲和力,因此用作对正在进行细胞凋亡的细胞的流式细胞分析的敏感探针。由于PS的外化发生在凋亡的早期阶段,FITC膜联蛋白V染色可以比基于核变化如DNA片段化的测定在早期鉴定凋亡。






  1. 由于应用程序不同,每个研究者应滴定试剂以获得zui佳结果。
  2. 所有血清蛋白的来源均来自美国农业部检查的位于美国的屠宰场。
  3. 注意:叠氮钠在酸性条件下会产生高毒性的叠氮酸。在弃置之前将水中的叠氮化合物稀释,以避免在管道中累积潜在的爆炸性沉积物。


江西11选5走势图Apoptosis is a normal physiologic process which occurs during embryonic development as well as in maintenence of tissue homeostasis. The apoptotic program is characterized by certain morphologic features, including loss of plasma membrane asymmetry and attachment, condensation of the cytoplasm and nucleus, and internucleosomal cleavage of DNA. Loss of plasma membrane is one of the earliest features. In apoptotic cells, the membrane phospholipid phosphatidylserine (PS) is translocated from the inner to the outer leaflet of the plasma membrane, thereby exposing PS to the external cellular environment. Annexin V is a 35-36 kDa Ca2+ dependent phospholipid-binding protein that has a high affinity for PS, and binds to cells with exposed PS. Annexin V may be conjugated to fluorochromes including FITC. This format retains its high affinity for PS and thus serves as a sensitive probe for flow cytometric analysis of cells that are undergoing apoptosis. Since externalization of PS occurs in the earlier stages of apoptosis, FITC Annexin V staining can identify apoptosis at an earlier stage than assays based on nuclear changes such as DNA fragmentation.


FITC Annexin V staining precedes the loss of membrane integrity which accompanies the latest stages of cell death resulting from either apoptotic or necrotic processes. Therefore, staining with FITC Annexin V is typically used in conjunction with a vital dye such as propidium iodide (PI) or 7-Amino-Actinomycin (7-AAD) to allow the investigator to identify early apoptotic cells (PI negative, FITC Annexin V positive). Viable cells with intact membranes exclude PI, wheras the membranes of dead and damaged cells are permeable to PI. For example, cells that are considered viable are FITC Annexin V and PI negative; cells that are in early apoptosis are FITC Annexin V positive and PI negative; and cells that are in late apoptosis or already dead are are both FITC Annexin V and PI positive. This assay does not distinguish between cells that have undergone apoptotic death versus those that have died as a result of a necrotic pathway because in either case, the dead cells will stain with both FITC Annexin V and PI. However, when apoptosis is measured over time, cells can be often tracked from FITC Annexin V and PI negative (viable, or no measurable apoptosis), to FITC Annexin V positive and PI negative (early apoptosis, membrane integrity is present) and finally to FITC Annexin V and PI positive (end stage apoptosis and death). The movement of cells through these three stages suggests apoptosis. In contrast, a single observation indicating that cells are both FITC Annexin V and PI positive, in of itself, reveals less information about the process by which the cells underwent their demise.


江西11选5走势图Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze.


  1. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
  2. Source of all serum proteins is from USDA inspected abattoirs located in the United States.
  3. Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.


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