Application

For research use only. Not for use in diagnostic procedures.The Cell Death Detection ELISA^PLUS photometric enzyme immunoassay is used for the quantitative in vitro determination of cytoplasmic histone-associated DNA fragments (mono- and oligonucleosomes) after induced cell death.The kit contains a stop solution which allows users to terminate the substrate reaction and run the assay under defined conditions, making it suitable for use in high-throughput applications.

Features and Benefits

One-step ELISA High sensitivity: (5 x 102 cells/ml) Fast performance: (3 - 4 hours) Positive control included No prelabeling of cells necessary Nonradioactive assay system No species restriction Easy handling Low background Suppressed human anti-mouse factor Function tested

General description

Use this kit for relative quantification of histone-complexed DNA fragments (mono- and oligonucleosomes) out of the cytoplasma of cells after the induction of apoptosis or when released from necrotic cells. Since the assay does not require prelabeling of cells, it can detect internucleosomal degradation of genomic DNA during apoptosis even in cells that do not proliferate in vitro, for example, freshly isolated tumor cells. The antibodies used in the assay are not species-specific, therefore, the kit may be used to assay cells from a wide variety of species.

Other Notes

For life science research only. Not for use in diagnostic procedures.

Packaging

11774425001 (1 kit containing 10 components) 11920685001 (1 kit containing 10 components)

1 kit containing 10 components

Preparation Note

Working solution: Preparation of Working SolutionsAlongside the ready-to-use solutions supplied with this kit, you will need to prepare the following working solutions:Note: Use only double-distilled water for reconstitution of lyophilizates.Anti-Histone BiotinReconstitute the lyophilizate in 450 µl double-distilled water for 10 minutes and mix thoroughly.Use: Component of the Immunoreagent.Anti-DNA PeroxidaseReconstitute the lyophilizate in 450 µl double-distilled water for 10 minutes and mix thoroughly.Use: Component of the Immunoreagent.Positive ControlReconstitute the lyophilizate in 450 µl double-distilled water for 10 minutes and mix thoroughly.Use: ELISA Step 1.ABTS TabletsDependent on the number of samples tested, dissolve 1, 2, or 3 tablets from bottle 7 in 5, 10, or 15 ml Substrate Buffer.Use: ELISA Step 5.ABTS Stop SolutionIf turbidity or a precipitate is visible, warm to 37 °C with shaking until the solution is clear.Use: ELISA Step 6.Storage conditions (working solution): Anti-Histone Biotin: 2 to 8 °C for 2 monthsABTS Tablets: 1 month stored protected from light. Allow to come to 15 to 25 °C before use.ABTS Stop Solution: 2 to 8 °C until the expiration date printed on the label.

The exact detection limit of dying/dead cells in a particular sample strongly depends on the kinetics of cell death, the cytotoxic agent used, and the amount of affected cells in the total cell population. Using U937/camptothecin (CAM) as a cellular model system for cell death, the immunoassay allows the specific detection of mono- and oligonucleosomes in the cytoplasmic fraction of 125cell equivalents/well.

Specifications

Assay time: 3 - 4 hoursNegative control: Depending on cell culture conditions, each exponentially growing permanent cell culture contains a certain amount of dead cells (typically approximately 3 - 8%). In the immunoassay, these inherent dead cells in the untreated sample (without a cell-death-inducing agent) will cause a certain absorbance value (negative control).Positive control: A DNA-histone complex serves as a positive control.Sample material: Cytoplasmic fractions (lysates) of cell lines, cells ex vivo, cell culture supernatants, and serum or plasma

Specificity

Anti-histone reacts with the histones H1, H2A, H2B, H3, and H4 of various species (e.g., human, mouse, rat, hamster, cow, opossum, Xenopus). Anti-DNA binds to single- and double-stranded DNA. Therefore, the ELISA allows the detection of mono- and oligonucleosomes from various species, and may be applied to measure apoptotic cell death in many different cell systems.

Unit Definition

Unit Conversion: 1 mU = 1 x 10-3 OD (1 mU = 0.001 OD).