Kit de tinción de células muertas LIVE/DEAD™ Fixable Red, para 488 nm de excitación
Kit de tinción de células muertas LIVE/DEAD™ Fixable Red, para 488 nm de excitación
Invitrogen™

Kit de tinción de células muertas LIVE/DEAD™ Fixable Red, para 488 nm de excitación

El kit de tinción de células muertas LIVE/DEAD™ Fixable Red se utiliza para determinar la viabilidad de las células antesMás información
Have Questions?
Cambiar vistabuttonViewtableView
Número de catálogoCantidad
L23102200 ensayos
L34972400 ensayos
L3497180 ensayos
Número de catálogo L23102
Precio (MXN)
-
Cantidad:
200 ensayos
El kit de tinción de células muertas LIVE/DEAD™ Fixable Red se utiliza para determinar la viabilidad de las células antes de la fijación y la permeabilización necesarias para la tinción de anticuerpos intracelulares o antes de la eliminación de materiales biopeligrosos mediante fijación en formaldehído. Este kit se ha optimizado y validado para su uso con un citómetro de flujo de láser azul.

• Estable: los colorantes se han liofilizado en viales separados para mantener la estabilidad

• Sólido: el patrón de tinción es el mismo antes y después de la fijación

• Señal brillante: permite una fácil distinción entre células vivas/muertas en un solo canal
Consulte una guía de selección para todos los colorantes de viabilidad con fijación para citometría de flujo.

Estable
A diferencia de los productos que se venden en forma de solución, la tinción LIVE/DEAD™ Fixable Red se ha envasado cómodamente en viales de 40 ensayos para ayudar a garantizar la estabilidad y el rendimiento del colorante a largo plazo. Al introducirse en la solución, los colorantes de reactivos de amina perderán su eficacia tras un corto periodo de tiempo; por lo tanto, se recomienda utilizar el total del vial una vez que se haya rehidratado. Si esto no es posible, divida los viales en pequeños volúmenes y almacénelos a -80 °C; evite someterlos a ciclos de congelación y descongelación.

Sólido
Los tintes del discriminador de células muertas pueden ver reducida su sensibilidad tras un tratamiento con fijadores, como los métodos de fijación basados en formaldehído o etanol que resultan necesarios para llevar a cabo estudios de fosforilación intracelular. La tinción LIVE/DEAD™ Fixable Red es un tinte de reactivos de amina que se une de forma covalente a las aminas intra y extracelulares. El patrón de tinción se mantiene después de la fijación con formaldehído.

Brillo óptimo
La tinción LIVE/DEAD™ Fixable Red se ha seleccionado basándose en sus propiedades fluorescentes para proporcionar una señal brillante cuando se excita con un láser amarilla, verde o azul de 488 nm. El colorante reactivo fluorescente rojo tiene un máximo de excitación de ∼ 595 nm, por lo que es ideal para su uso con un láser amarillo, y una emisión de ∼ 615 nm, lo que permite su recopilación con un filtro 610 o 630 BP. La tinción de células muertas LIVE/DEAD™ Fixable Red también se excita bien con el láser azul de 488 nm. Puesto que se pueden distinguir células vivas y muertas con un solo tinte y un solo canal de un citómetro de flujo, es la opción ideal para experimentos de varios colores.

Funcionamiento
En células con membranas comprometidas, el colorante reacciona con aminas libres tanto en el interior de la célula como en su superficie, lo que provoca una intensa tinción fluorescente. En células viables, la reactividad del colorante está limitada a las aminas de la superficie celular, lo que se traduce en una fluorescencia menos intensa. La diferencia de intensidad suele ser 50 veces mayor entre células vivas y muertas, lo que facilita la discriminación.

Colores disponibles
Los tintes de células muertas con fijación LIVE/DEAD™ están disponibles en una amplia variedad de colores para satisfacer sus necesidades de paneles de varios colores.

Para uso exclusivo en investigación. No apto para uso en procedimientos diagnósticos.

Especificaciones
Permeabilidad celularImpermeable
Tipo de célulaCélulas eucariotas
DescripciónKit de tinción de células muertas LIVE/DEAD™ Fixable Red, para 488 nm de excitación
Método de detecciónFluorescente
Tipo de coloranteTinción de células muertas LIVE/DEAD™ Fixable Red
FormularioSólido
FormatoTubo(s)
Cantidad200 ensayos
Condiciones de envíoTemperatura ambiente
SolubilidadDMSO (dimetilsulfóxido)
ColorRojo
Emission615 nm
Excitation Wavelength Range488, 595 nm
Para utilizar con (aplicación)Ensayo de viabilidad
Para utilizar con (equipo)Citómetro de flujo
Línea de productosLIVE/DEAD
Tipo de productoTinción
Unit SizeEach
Contenido y almacenamiento
Contiene 5 viales de tinción de células muertas con fijación LIVE/DEAD™ y 500 μl de DMSO.

Almacenar a -20 °C.

Preguntas frecuentes

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.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.

Regarding the LIVE/DEAD Fixable Dead Cell Stain Kits, which can discriminate between live and dead cells using flow cytometry with one emission wavelength. Can these kits be used with microscopy?

This dye gives a dim surface label for live cells, but is internalized and gives a brighter signal for dead cells. Flow cytometry is a very sensitive technique and can easily distinguish between the two populations. Microscopy is not as sensitive and may not be able to distinguish the cells because of a less sensitive detector.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.

How do I prepare dead cell controls for LIVE/DEAD cell viability assays?

There are two easy options. One is to heat-inactivate the cells by placing at 60 degrees C for 20 minutes. The second is to subject the cells to 70% ethanol. Alcohol-fixed cells can be stored indefinitely in the freezer until use, potentially up to several years.

Centrifuge cells, pellet, and remove supernatant.
Fix cells: Add 10 mL ice cold 70% ETOH to a 15 mL tube containing the cell pellet, adding dropwise at first while vortexing, mix well.
Store in freezer until use.
When ready to use, wash twice and resuspend in buffer of choice.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.

Which cell viability kits are compatible with fixation?

The LIVE/DEAD Fixable kits for flow cytometry analysis are compatible with fixation. These kits use amine-reactive cell-impermeant dyes that stain the cell surface of live cells and also the cytosol of dead cells-live cells are dim and dead cells are bright. Since the dye is covalently bound to the cells, it will be retained after fixation. Unfortunately, this method does not work well for imaging-based assays, as all cells are stained and it is difficult to distinguish bright dead cells from dim live cells with a microscope. Ethidium monoazide (EMA; Cat No. E1374) is a cell impermeant nucleic acid stain that can be applied to live cultures and stains only dead cells. After incubation and washing away unbound dye, the cells can be exposed to light to photoactivate EMA to crosslink to dead cell DNA. After crosslinking to dead cell DNA, the samples may be fixed and permeabilized. Image-IT DEAD Green Viability Stain (Cat. No. I10291) for imaging and high-content screening (HCS) analysis is a live-cell impermeant DNA binding dye that is compatible with fixation and permeabilization with good retention up to 48 hours. We also have a LIVE/DEAD Reduced Biohazard Cell Viability Kit (Cat. No. L7013) for imaging and flow analysis that contains two DNA binding dyes, SYTO 10 and Dead Red, that are sufficiently retained to be analyzed soon after 4% glutaraldehyde fixation.
Note: In general, DNA-binding dyes and calcein AM are not compatible with fixation, as these dyes are not covalently bound to components of the cell and will thus slowly diffuse out of cells after fixation, gradually staining all cells as dead.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.

Why do I need to include a viability stain in my assays?

Many antibodies and stains will label dead cells. This will give you misleading data if you do not exclude the dead cells from your analysis. Of course, if you are labeling fixed cells, they are already dead and you do not need a viability stain. However, if you label your cells prior to fixation, then you need to use one of the LIVE/DEAD Fixable Dead Cell Stains.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.

Citations & References (21)

Citations & References
Abstract
Amine reactive dyes: an effective tool to discriminate live and dead cells in polychromatic flow cytometry.
Authors:Perfetto SP, Chattopadhyay PK, Lamoreaux L, Nguyen R, Ambrozak D, Koup RA, Roederer M,
Journal:J Immunol Methods
PubMed ID:16756987
'Membrane-damaged cells caused by either mechanical trauma or through normal biological processes can produce artifacts in immunophenotyping analysis by flow cytometry. Dead cells can nonspecifically bind monoclonal antibody conjugates, potentially leading to erroneous conclusions, particularly when cell frequencies are low. To date, DNA intercalating dyes (Ethidium monoazaide (EMA), Propidium Iodide, ... More
Levels of circulating endothelial cells are low in idiopathic pulmonary fibrosis and are further reduced by anti-fibrotic treatments.
Authors:De Biasi S, Cerri S, Bianchini E, Gibellini L, Persiani E, Montanari G, Luppi F, Carbonelli CM, Zucchi L, Bocchino M, Zamparelli AS, Vancheri C, Sgalla G, Richeldi L, Cossarizza A,
Journal:
PubMed ID:26552487
'It has been suggested that circulating fibrocytes and endothelial cells actively participate in the intense remodelling of the pulmonary vasculature in patients with idiopathic pulmonary fibrosis (IPF). Indeed, fibrotic areas exist that have fewer blood vessels, whereas adjacent non-fibrotic tissue is highly vascularized. The number of circulating endothelial cells (CEC) ... More
IL-1 family members IL-18 and IL-33 upregulate the inflammatory potential of differentiated human Th1 and Th2 cultures.
Authors:Blom L, Poulsen LK,
Journal:J Immunol
PubMed ID:23028054
'The IL-1 family members IL-1ß, IL-18, and IL-33 are potent cytokines in relationship to amplifying the CD4(+) T cell cytokine production. To evaluate their impact on in vitro-differentiated human Th1 and Th2 cultures, such cultures were established from naive T cells, purified from healthy blood donors, and reactivated in the ... More
Trogocytosis by Entamoeba histolytica contributes to cell killing and tissue invasion.
Authors:Ralston KS, Solga MD, Mackey-Lawrence NM, Somlata, Bhattacharya A, Petri WA,
Journal:
PubMed ID:24717428
'Entamoeba histolytica is the causative agent of amoebiasis, a potentially fatal diarrhoeal disease in the developing world. The parasite was named '
Establishment of an aerosol challenge model of tuberculosis in rhesus macaques and an evaluation of endpoints for vaccine testing.
Authors:Sharpe SA, McShane H, Dennis MJ, Basaraba RJ, Gleeson F, Hall G, McIntyre A, Gooch K, Clark S, Beveridge NE, Nuth E, White A, Marriott A, Dowall S, Hill AV, Williams A, Marsh PD,
Journal:Clin Vaccine Immunol
PubMed ID:20534795
'The establishment of an aerosol challenge model in nonhuman primates (NHPs) for the testing of vaccines against Mycobacterium tuberculosis would assist the global effort to optimize novel vaccination strategies. The endpoints used in preclinical challenge studies to identify measures of disease burden need to be accurate and sensitive enough to ... More