检测原理 利用 LIVE/DEAD® 细胞成像试剂盒,可通过在活细胞内保存完好的几乎不发荧光的细胞透过性钙黄绿素 AM 和高强度荧光钙黄绿素的酶催化转化,确定细胞内普遍存在的酯酶活性,从而区分活细胞。LIVE/DEAD® 细胞成像试剂盒中的红色组分是细胞不透过性的,因此只能进入具有受损细胞膜的细胞。在即将死亡的和死亡细胞中与 DNA 结合后,会产生明亮的红色荧光。该检测技术本身的背景荧光水平较低,因为染料在与细胞相互作用前几乎不发荧光。基于其中荧光基团的亮度、光谱特性(FITC 和 Texas Red 滤光片)和易用性而选择 LIVE/DEAD® 细胞成像试剂盒。由于其针对工作流程便利性的包装,可轻松快速地测定细胞群中的活细胞和死亡细胞组分。
I need to use a dead cell control for my viability assay. Do you have a protocol for killing cells for this?
Heat killing is commonly used. Place your cells in a tube in buffer and heat at 60oC for 20 minutes. You can also kill your cells by fixing them with ice cold 70% ethanol for 15 minutes. The ethanol-killed cells can then be stored at -20oC until needed, at which point you wash out the ethanol and replace with buffer.
Can I use the LIVE/DEAD Cell Imaging Kit (488/570) (Cat. No. R37601) with fixed cells?
The LIVE/DEAD Cell Imaging Kit (488/570) (Cat. No. R37601) is used for identifying live and dead cells using fluorescence-based staining. It cannot be used with fixed cells.
What is the composition of the Live Green (Component A) of the LIVE/DEAD Cell Imaging Kit (488/570) (Cat. No. R37601)?
The formulation of the solution as well as the amount and concentration of Calcein, AM provided in the LIVE/DEAD Cell Imaging Kit (488/570) (Cat. No. R37601) is proprietary information.
A novel microfluidic platform for high-resolution imaging of a three-dimensional cell culture under a controlled hypoxic environment.
Authors:Funamoto K, Zervantonakis IK, Liu Y, Ochs CJ, Kim C, Kamm RD,
Journal:Lab Chip
PubMed ID:23023115
'Low oxygen tensions experienced in various pathological and physiological conditions are a major stimulus for angiogenesis. Hypoxic conditions play a critical role in regulating cellular behaviour including migration, proliferation and differentiation. This study introduces the use of a microfluidic device that allows for the control of oxygen tension for the ... More
Saikosaponin-d Enhances the Anticancer Potency of TNF-a via Overcoming Its Undesirable Response of Activating NF-Kappa B Signalling in Cancer Cells.
Authors:Wong VK, Zhang MM, Zhou H, Lam KY, Chan PL, Law CK, Yue PY, Liu L,
Journal:Evid Based Complement Alternat Med
PubMed ID:23573150
'Tumor necrosis factor-alpha (TNF- a ) was reported as anticancer therapy due to its cytotoxic effect against an array of tumor cells. However, its undesirable responses of TNF- a on activating NF- ? B signaling and pro-metastatic property limit its clinical application in treating cancers. Therefore, sensitizing agents capable of ... More
Aryl hydrocarbon receptor protects against bacterial infection by promoting macrophage survival and reactive oxygen species production.
Authors:Kimura A, Abe H, Tsuruta S, Chiba S, Fujii-Kuriyama Y, Sekiya T, Morita R, Yoshimura A,
Journal:
PubMed ID:24343818
'Aryl hydrocarbon receptor (AhR) is crucial for various immune responses. The relationship between AhR and infection with the intracellular bacteria Listeria monocytogenes (LM) is poorly understood. Here, we show that in response to LM infection, AhR is required for bacterial clearance by promoting macrophage survival and reactive oxygen species (ROS) ... More
Circulating fibrocytes stabilize blood vessels during angiogenesis in a paracrine manner.
Authors:Li J, Tan H, Wang X, Li Y, Samuelson L, Li X, Cui C, Gerber DA,
Journal:
PubMed ID:24300950
'Accumulating evidence supports that circulating fibrocytes play important roles in angiogenesis. However, the specific role of fibrocytes in angiogenesis and the underlying mechanisms remain unclear. In this study, we found that fibrocytes stabilized newly formed blood vessels in a mouse wound-healing model by inhibiting angiogenesis during the proliferative phase and ... More
Characterizing natural hydrogel for reconstruction of three-dimensional lymphoid stromal network to model T-cell interactions.
Authors:Kim J, Wu B, Niedzielski SM, Hill MT, Coleman RM, Ono A, Shikanov A,
Journal:
PubMed ID:25649205
'Hydrogels have been used in regenerative medicine because they provide a three-dimensional environment similar to soft tissues, allow diffusion of nutrients, present critical biological signals, and degrade via endogenous enzymatic mechanisms. Herein, we developed in vitro system mimicking cell-cell and cell-matrix interactions in secondary lymphoid organs (SLOs). Existing in vitro ... More