Solución Hoechst 33342 (20 mM)
Thermo Scientific™

Solución Hoechst 33342 (20 mM)

La tinción fluorescente Hoechst 33342 Thermo Scientific Pierce es una solución de alta calidad de colorante Hoechst para una tinciónMás información
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Número de catálogoCantidad
622495 mL
Número de catálogo 62249
Precio (CLP)
136.136
Each
Cantidad:
5 mL
Precio (CLP)
136.136
Each
La tinción fluorescente Hoechst 33342 Thermo Scientific Pierce es una solución de alta calidad de colorante Hoechst para una tinción fluorescente de células vivas y fijas de ADN y núcleos en técnicas de adquisición de imágenes celulares.

Características de la tinción fluorescente Hoechst 33342:

Colorante Hoechst: tinción fluorescente azul específica para ADN (es decir, núcleos de células eucariotas)
Cómodo: suministrado en forma de solución de colorante Hoechst fácil de usar (20 mm)
Adquisición de imágenes celulares: el colorante penetra en las células y es eficaz para la tinción de células vivas y fijas
Contratinción: ideal para utilizar junto con la detección de elementos diana específicos mediante anticuerpos fluorescentes para microscopía de fluorescencia o detección de alto contenido (HCS)

Hoechst 33342 (2'-[4'-etoxifenil]-5-[4-metilpiperazin-1-il]-2,5'-bis-1h- benzimidazol trihidrocloruro trihidrato) es una tinción de ADN que penetra en las células, se excita con luz ultravioleta y emite fluorescencia de color azul a entre 460 y 490 nm. Hoechst 33342 se une predominantemente a las regiones de adenina-timina (A-T) del ADN. Esta tinción se une al surco menor del ADN y muestra espectros de emisión de fluorescencia que dependen de la relación de pares colorante:base.

Propiedades del colorante fluorescente Hoechst
Como contratinción en la adquisición de imágenes fluorescentes, el colorante Hoechst es compatible con anticuerpos y otras sondas etiquetadas con colorantes de fluoresceína y rodamina, así como con los flúores Thermo Scientific DyLight. La solución madre acuosa estable de 20 mm está lista para su uso.

Hoechst 33342 se utiliza para la tinción específica de los núcleos de tejidos y células fijas y vivas. Esta tinción se suele utilizar en combinación con el etiquetado de 5-bromo-2'-desoxiuridina (BrdU) para distinguir la cromatina compacta de los núcleos apoptóticos, para identificar las células de replicación y para clasificar las células en función de su contenido de ADN. Hoechst 33342 y el yoduro de propidio se utilizan juntos con frecuencia para la citometría de flujo y el análisis de adquisición de imágenes de fluorescencia simultáneos de las etapas de la apoptosis y la distribución del ciclo celular.
Para uso exclusivo en investigación. No apto para uso en procedimientos diagnósticos.
Especificaciones
ColorAzul
Concentración20 mM
Método de detecciónFluorescente
Tipo de colorantePermeabilidad celular
Emisión497 nm
Intervalo de longitud de onda de excitación361 nm
Para utilizar con (aplicación)Etiquetado fluorescente
Para utilizar con (equipo)Microscopio de fluorescencia, instrumento de alto contenido
FormularioLíquido
Línea de productosPierce
Cantidad5 mL
Condiciones de envíoTemperatura ambiente
Tipo de etiquetaFluorescent Dye
Tipo de productoTinción
Sub Cellular LocalizationNucleus
Unit SizeEach
Contenido y almacenamiento
Una vez recibido, almacenar a 4 °C y proteger de la luz.

Preguntas frecuentes

Is DAPI a good live-cell nuclear label?

DAPI is considered a semi-permeant/impermeant nucleic acid stain. Staining of nucleic is dependent upon the cell line in its performance. Some cell lines will label with DAPI, others not at all, and others label inconsistenly. Instead, we recommend using either Hoechst 33342 or Hoechst 33258, which have the same wavelength and binding mode as DAPI (at the A-T minor groove) but are readily cell-permeant.

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

I want to label the nuclei of live cells and track them over time. Can I use DAPI for this?

We do not recommend doing this. DAPI is considered to be a semi-permeant/impermeant nucleic acid stain. DAPI staining of live cells may be inconsistent. It is best used as a counterstain for fixed samples. Other cell permeable nucleic acid stains, such as Hoechst or the SYTO dyes may affect cellular function.

For mammalian cells, we recommend using the CellLight Nucleus transduction reagents, available in CFP, GFP and RFP. With these reagents, the cells are transduced overnight in a single labeling step and the next day the nuclei will fluoresce. The label may be retained for 3-5 days and should not affect cell function. Cytoplasmic cell tracking dyes such as the CellTracker dyes may also be used.

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

I have a mix of live bacteria and platelet cells, and I need to be able to separate out the bacteria. Do you have a suggestion?

Platelet cells don't have DNA, while bacteria do. Therefore, a cell-permeant, DNA-selective dye would preferentially stain the bacteria with limited staining of the platelets. We recommend using Hoechst 33342 dye.

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

DAPI and Hoechst dyes are quite similar to each other. Why would I choose one over the other?

DAPI is a very common blue-fluorescent dye for nuclear counterstaining and gives very bright labeling on nuclei in fixed and permeabilized cells and tissues. However, it is considered to be a semi-permeant to impermeant stain and provides inconsistent staining of live cells. Hoechst 33342 dye is cell-permeant and stains with the same binding mechanism and fluorescent color; it is preferred for live-cell imaging and is just as good as DAPI for fixed cell labeling.

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

Citations & References (10)

Citations & References
Abstract
Generation, transcriptome profiling, and functional validation of cone-rich human retinal organoids.
Authors:Kim S, Lowe A, Dharmat R, Lee S, Owen LA, Wang J, Shakoor A, Li Y, Morgan DJ, Hejazi AA, Cvekl A, DeAngelis MM, Zhou ZJ, Chen R, Liu W
Journal:Proc Natl Acad Sci U S A
PubMed ID:31072937
'Rod and cone photoreceptors are light-sensing cells in the human retina. Rods are dominant in the peripheral retina, whereas cones are enriched in the macula, which is responsible for central vision and visual acuity. Macular degenerations affect vision the most and are currently incurable. Here we report the generation, transcriptome ... More
Yin Yang 1 Orchestrates a Metabolic Program Required for Both Neural Crest Development and Melanoma Formation.
Authors:Varum S, Baggiolini A, Zurkirchen L, Atak ZK, Cantù C, Marzorati E, Bossart R, Wouters J, Häusel J, Tuncer E, Zingg D, Veen D, John N, Balz M, Levesque MP, Basler K, Aerts S, Zamboni N, Dummer R, Sommer L
Journal:Cell Stem Cell
PubMed ID:30951662
'Increasing evidence suggests that cancer cells highjack developmental programs for disease initiation and progression. Melanoma arises from melanocytes that originate during development from neural crest stem cells (NCSCs). Here, we identified the transcription factor Yin Yang 1 (Yy1) as an NCSCs regulator. Conditional deletion of Yy1 in NCSCs resulted in ... More
Semisynthetic biosensors for mapping cellular concentrations of nicotinamide adenine dinucleotides.
Authors:Sallin O, Reymond L, Gondrand C, Raith F, Koch B, Johnsson K
Journal:Elife
PubMed ID:29809136
We introduce a new class of semisynthetic fluorescent biosensors for the quantification of free nicotinamide adenine dinucleotide (NAD
Neuropsin (OPN5) Mediates Local Light-Dependent Induction of Circadian Clock Genes and Circadian Photoentrainment in Exposed Murine Skin.
Authors:Buhr ED, Vemaraju S, Diaz N, Lang RA, Van Gelder RN
Journal:Curr Biol
PubMed ID:31607531
Nearly all mammalian tissues have functional, autonomous circadian clocks, which free-run with non-24 h periods and must be synchronized (entrained) to the 24 h day. This entrainment mechanism is thought to be hierarchical, with photic input to the retina entraining the master circadian clock in the suprachiasmatic nuclei (SCN) and the SCN ... More
Ca
Authors:Li S, Lavagnino Z, Lemacon D, Kong L, Ustione A, Ng X, Zhang Y, Wang Y, Zheng B, Piwnica-Worms H, Vindigni A, Piston DW, You Z
Journal:Mol Cell
PubMed ID:31053472
Abnormal processing of stressed replication forks by nucleases can cause fork collapse, genomic instability, and cell death. Despite its importance, it is poorly understood how the cell properly controls nucleases to prevent detrimental fork processing. Here, we report a signaling pathway that controls the activity of exonuclease Exo1 to prevent ... More