Cellular Toxicology Products

Cryopreserved Hepatocyte Plating Medium (CHPM) Gibco™

Cryopreserved Hepatocyte Plating Medium (CHPM) used for plating Gibco® cryopreserved human hepatocytes for optimal attachment and monolayer formation.

For research use only. Not intended for human or animal therapeutic or diagnostic use.

Related Link

Learn more about our Hepatic Cell Culture reagents

Vybrant™ Apoptosis Assay Kit #6, Biotin-X Annexin V/Alexa Fluor™ 350 Streptavidin/Propidium Iodide Invitrogen™

The Vybrant Apoptosis Assay Kit #6 uses the bright, blue-fluorescent Alexa Fluor 350 conjugate of streptavidin in conjunction with biotin-X annexin V to detect apoptotic cell populations either by flow cytometry or imaging. Alexa Fluor 350 streptavidin binds to biotin-X annexin V, which in turn binds to the phosphatidylserine on the surfaces of apoptotic cells. Necrotic cells are distinguished using red-fluorescent propidium iodide, which binds tightly to the nucleic acids in those cells. Propidium iodide does not penetrate the plasma membranes of live cells or early apoptotic cells. The kit contains an ample amount of each reagent for about 50 flow cytometric assays.

View a selection guide for all apoptosis assays for flow cytometry.

Chromatin Condensation & Membrane Permeability Dead Cell Apoptosis Kit with Hoechst 33342, YO-PRO™-1, and PI dyes, for flow cytometry Invitrogen™

This product detects apoptotic cells with changes in nuclear chromatin condensation and plasma membrane permeability, using three nucleic acid stains: UV-excitable Hoechst 33342, green fluorescent YO-PRO™ dye, and propidium iodide. The YO-PRO™ dye can enter apoptotic cells, whereas red-fluorescent propidium iodide (PI) cannot. Thus after staining with YO-PRO™-1 dye and PI, apoptotic cells show green fluorescence, and dead cells show primarily red fluorescence and some green fluorescence. Blue fluorescent Hoechst 33342 brightly stains the condensed chromatin of apoptotic cells and more dimly stains the normal chromatin of live cells. The staining pattern resulting from the simultaneous use of these three dyes makes it possible to distinguish normal, apoptotic and dead cell populations by flow cytometry or fluorescence microscopy.

View a selection guide for all apoptosis assays for flow cytometry.

FluoReporter™ Blue Fluorometric dsDNA Quantitation Kit, 200-2,000 assays Invitrogen™

The FluoReporter® Blue Fluorometric dsDNA Quantitation Kit provides the protocols and reagents for analyzing cellular NA with the blue-fluorescent Hoechst 33258 nucleic acid stain. With this kit, quantitation of cellular DNA is rapid, and all manipulations can be carried out in microplate wells. The cells are lysed by freezing them in distilled water, the diluted dye solution is then added to the lysed cells, and fluorescence is measured.

LIVE/DEAD™ Viability/Cytotoxicity Kit, for mammalian cells Invitrogen™

The LIVE/DEAD® Viability/Cytotoxicity Kit is a quick and easy two-color assay to determine viability of cells in a population based on plasma membrane integrity and esterase activity. The kit can be used in flow cytometry, fluorescence microscopy, and with fluorescence microplate readers.

Advantages Over Alternative Methods Include:


•  Faster
•  Safer
•  More sensitive
•  Less expensive

Easily Use with a Wide Variety of Techniques and Cell Types
Ubiquitous intracellular esterase activity and an intact plasma membrane are distinguishing characteristics of live cells. The LIVE/DEAD® Viability/Cytotoxicity Kit quickly discriminates live from dead cells by simultaneously staining with green-fluorescent calcein-AM to indicate intracellular esterase activity and red-fluorescent ethidium homodimer-1 to indicate loss of plasma membrane integrity. It is adaptable to most eukaryotic cells where cytotoxic conditions produce these cellular effects. The assay is useful with a variety of fluorescence-detection methodologies.

Sensitive, Safe, and Efficient

The LIVE/DEAD® Viability/Cytotoxicity Kit is more sensitive than Trypan blue exclusion, a commonly used method for live/dead cell discrimination. The cost-effective LIVE/DEAD® Viability/Cytotoxicity Kit is highly sensitive due to the bright fluorescence of both dyes upon interacting with either live (for calcein-AM) or dead (for ethidium homodimer-1) cells. Background levels are low due to the fact that both dyes are virtually non-fluorescent prior to interacting with cells.

LIVE/DEAD® Assays Available for a Broad Range of Applications
A selection of Invitrogen LIVE/DEAD® Viability Assays is offered for mammalian cells, bacteria, yeast and fungi, as well as Fixable Dead Cell Stain Kits for use in intracellular staining for flow cytometry. All LIVE/DEAD® assays provide quick, positive discrimination between viable and non-viable cells.

Related Link
•  Learn More and See the Full Range of LIVE/DEAD® Assay Products.

Calcein, high purity Invitrogen™

Calcein is a polyanionic fluorescein derivative that exhibits fluorescence that is essentially independent of pH between 6.5 and 12. This versatile green fluorophore is cell impermeant and is commonly used for cell tracing and in studies of endocytosis and gap junctions.

CellTracker™ Blue CMHC Dye Invitrogen™

CellTracker™ Blue CMHC (4-chloromethyl-7-hydroxycoumarin) is a fluorescent dye well suited for monitoring cell movement or location. This dye is well retained, allowing for multigenerational tracking of cellular movements. And the blue excitation/emission spectra are ideal for multiplexing with green and red fluorescent dyes and proteins.

Need a different emission spectrum or longer tracking? View our other mammalian cell tracking products.

• Easy to use—remove medium, add dye, incubate 30 minutes, and image cells
• Fluorescent signal retention of >72 hours (typically three to six generations)
• Blue excitation/emission spectra (372/470 nm maxima) ideal for multiplexing
• Low cytotoxicity—does not affect viability or proliferation

CellTracker™ Blue CMHC fluorescent dye has been designed to freely pass through cell membranes into cells, where it is transformed into cell membrane-impermeant reaction products. CellTracker™ Blue CMHC dye is retained in living cells through several generations. The dye is transferred to daughter cells, but not adjacent cells in a population. CellTracker™ Blue CMHC dye is designed to display fluorescence for at least 72 hours, and the dye exhibits ideal tracking properties: it is stable, nontoxic at working concentrations, well retained in cells, and brightly fluorescent at physiological pH. Additionally, the excitation and emission spectra of CellTracker™ Blue CMHC dye are well separated from GFP (green fluorescent protein) and RFP (red fluorescent protein) spectra allowing for multiplexing.

Vybrant™ FAM Caspase-8 Assay Kit, for flow cytometry Invitrogen™

The Vybrant™ FAM Caspase-8 Assay Kit employs a novel approach to detect active caspases that is based on a fluorescent inhibitor of caspases (FLICA™) methodology, essentially an affinity label. The reagent associates a fluoromethyl ketone (FMK) moiety, which can react covalently with a cysteine, with a caspase-specific amine acid sequence. For caspase-8, this recognition sequence is leucine-glutamic acid-threonine-aspartic acid (LETD). A fluorescein group is attached as a reporter. The FLICA reagent is thought to interact with the enzymatic reactive center of an activated caspase via the recognition sequence, and then to attach covalently through the FMK moiety. The FLICA inhibitor is cell permeant and noncytotoxic. Unbound FLICA molecules diffuse out of the cell and are washed away; the remaining green-fluorescent signal is a direct measure of the amount of active caspase that was present at the time the inhibitor was added. This kit includes the FLICA reagent specific for caspase-8, Hoechst 33342 stain, and propidium iodide stain, which allows the simultaneous evaluation of caspase activation, membrane permeability, and cell cycle by flow cytometry.

View a selection guide for all apoptosis assays for flow cytometry.

CellTrace™ CFSE Cell Proliferation Kit, for flow cytometry Invitrogen™

CellTrace™ CFSE Cell Proliferation Kit is used for in vitro and in vivo labeling of cells to trace multiple generations using dye dilution by flow cytometry.

• Superior performance—bright, single-peak staining enables visualization of multiple generations
• Long-term signal stability—well-retained in cells for several days post stain
• Non-toxic—staining does not adversely effect cell health
• Simple, robust staining protocol

View a selection guide for all CellTrace™ Cell Proliferation Kits for flow cytometry.

Superior fluorescent staining
Successful proliferation analysis by dye dilution (see figure below) requires an extremely bright dye to distinguish fluorescently labeled cells from auto-fluorescence after several cell divisions. The intense fluorescent staining provided by CellTrace™ CFSE dye enables the visualization of eight or more generations of proliferating cells before the signal is overwhelmed by intrinsic cellular auto-fluorescence. Consistent, homogeneous staining results in very little fluorescence variation between cells in a population, so distinct generations can be seen without any requirement for complex modeling software.

Long-term signal retention
Unlike stains that label the lipid membrane of cells, CellTrace™ CFSE dye easily crosses the plasma membrane and covalently binds inside cells where the stable, well-retained fluorescent dye is designed to provide a consistent signal, even after several days in a cell culture environment.

Non-toxic
CellTrace™ CFSE dye binds covalently to all free amines on the surface and inside of cells and shows little cytotoxicity, with minimal observed effect on the proliferative ability or biology of cells. Researchers have used CFSE SE labeling to show that transplantable hematopoietic cells proliferate in vitro in response to stimulation by a growth factor cocktail.

Simple, robust staining protocol
The CellTrace™ CFSE Cell Proliferation Kit contains convenient single-use vials of dry dye to permit small-scale experiments without preparing excess quantities of dye. A stock solution is prepared by dissolving the contents of a vial in anhydrous DMSO prior to use. To stain 1 mL of cells in protein-free medium, 1 µL of this stock solution is typically used. Cells should be stained for 20 minutes at room temperature with gentle agitation. A brief wash with complete medium will then quench any dye remaining in solution.

Dead Cell Apoptosis Kit with Annexin V PE and SYTOX™ Green, for flow cytometry Invitrogen™

This product detects the externalization of phosphatidylserine in apoptotic cells using recombinant annexin V conjugated to the orange fluorescent phycobiliprotein R-PE, and dead cells using SYTOX™ Green nucleic acid stain. After treatment with both probes, apoptotic cells show orange fluorescence, dead cells show green fluorescence, and live cells show little or no fluorescence. These populations can easily be distinguished in the 530/30 nm and 585/42 nm bandpass filters with a 488 nm laser flow cytometer.

View a selection guide for all apoptosis assays for flow cytometry.

Human Suspension Hepatocytes, Polymorphic Donors, (9-12 x 106 cells) Gibco™

Each lot of cryopreserved human hepatocytes is suitable for use in suspension metabolism applications and has been pharmacogenetically characterized as an homozygous null allele (e.g. CYP2D6*4⁄*4) via genotyping analysis (TaqMan®). The commonly tested Phase I (P450) and Phase II (UGT, SULT) drug metabolizing enzymes are analyzed for metabolic activity in each lot. Metabolite formation is measured by standard biochemical assays using LC-MS/MS or HPLC.

Cells per vial: 9-12 million

Get the Results You Need with GIBCO® Hepatocytes
High quality hepatocytes, with high viabilities, in vivo-like enzyme expression levels, and proper cell morphology increase the ability to draw in vitro/in vivo correlations and make sound decisions regarding a compound's fate. Experienced technicians and proprietary isolation techniques combined with stringent release specifications ensure you receive the highest quality cryopreserved hepatocytes.

Each lot is tested for:

•Phase I and II enzyme activities
•Proper morphology
•Viabilities generally >75%

For research use only. Not intended for human or animal therapeutic or diagnostic use.

Related Links

Learn more about our cryopreserved hepatocytes

Learn about our full line of hepatocytes,

Note:
These products require shipment in LN2 vapor dewars therefore additional fees may apply.

HepaRG™ Cells, Cryopreserved Gibco™

The HepaRG™ cell line is an immortalized hepatic cell line that retains many characteristics of primary human hepatocytes. HepaRG™ cells are terminally differentiated and provided in a convenient cryopreserved format. For scientists who need reproducible metabolism data, HepaRG™ cells are an in vitro tool that provides reproducible results in a metabolically complete and scalable system.
• Obtain biologically relevant results from a metabolically complete system
• Assess the drug-drug interaction potential of your compound
• Experience reproducible results from a single population of cells

Biologically Relevant
HepaRG™ cells exhibit many characteristics of primary human hepatocytes including morphology, expression of key metabolic enzymes, expression of nuclear receptors, and drug transporters. Unlike HepG2 and Fa2N-4 cells, HepaRG™ cells have high P450 activity and complete expression of all nuclear receptors.

Predict Metabolism-based Drug-drug Interaction
HepaRG™ cells respond to prototypical P450 inducers and inhibitors to the same extent as primary hepatocytes, allowing HepaRG™ cells to be used to evaluate potential drug-drug interactions.

Infinitely Reproducible
HepaRG™ cells exhibit many characteristics of primary human hepatocytes and are essentially a single donor. These features allow users to obtain physiological relevant results for metabolism-based drug-drug interactions without the concern of donor variability and limited lot sizes that come with relying on donor tissue. (Note: The cells we provide are terminally differentiated).

HepaRG™ is a trademark of BioPredic International.

Calcein, AM Invitrogen™

Calcein AM is a cell-permeant dye that can be used to determine cell viability in most eukaryotic cells. In live cells the nonfluorescent calcein AM is converted to a green-fluorescent calcein, after acetoxymethyl ester hydrolysis by intracellular esterases. This dye is also available in our special packaging (C-3100) and as 1 mg of the solid (C-1430). For a longer wavelength version of this dye, check out our new CellTrace calcein red-orange AM (Cat. no. C-34851).

DiFMUP (6,8-Difluoro-4-Methylumbelliferyl Phosphate) Invitrogen™

DiFMUP is a fluorinated 4-methylumbelliferyl phosphate (MUP) derivative that has a lower pKa than that of MUP, making DiFMUP an excellent substrate for continuously assaying acid phosphatases at low pH. The reaction product of DiFMUP has excitation/emission maxima of ~358/450 nm. DiFMUP is also available packaged in ten vials of 10 mg each (D-22065).

Image-iT™ LIVE Red Poly Caspases Detection Kit, for microscopy Invitrogen™

The Image-iT™ LIVE Red Poly Caspases Detection Kit employs a novel approach to detect active caspases that is based on a fluorescent inhibitor of caspases (FLICA™) methodology, essentially an affinity label. The reagent associates a fluoromethyl ketone (FMK) moiety, which can react covalently with a cysteine, with a caspase-specific amine acid sequence. For poly caspases, this recognition sequence is valine-alanine-aspartic acid (VAD). A sulforhodamine group (SR) is attached as a reporter. The FLICA reagent is thought to interact with the enzymatic reactive center of an activated caspase via the recognition sequence, and then to attach covalently through the FMK moiety. The FLICA inhibitor is cell permeant and noncytotoxic. Unbound FLICA molecules diffuse out of the cell and are washed away; the remaining red-fluorescent signal is a direct measure of the amount of active caspase that was present at the time the inhibitor was added.
Results per page
    spinner