Description

Description: Introduction Elabscience® TUNEL Apoptosis Assay Kit is a highly sensitive, rapid and simple method for cell apoptosis detection. After Biotin-dUTP labeling and DAB staining, cell apoptosis can be detected under ordinary optical microscopy. This kit is developed to detect tissue (Paraffin embedding, freezing and ultrathin section) and cells (Cell smears, cell climbing smears) in situ apoptotic detection. Detection Principle When cells undergo apoptosis, endonuclease enzymes are activated to cleave the genomic DNA between nucleosomes. When genomic DNA is cleaved, the exposed 3'-OH can be added with a biotinylated dUTP (Biotin-dUTP) due to the catalysis of Terminal Deoxynucleotidyl Transferase (TdT), followed by the binding of horseradish Peroxidase-labeled Streptavidin (Streptavidin-HRP). Thereafter, through the HRP catalysis, the apoptotic cells are marked by DAB, which can be detected by ordinary microscopy. This is the principle of TUNEL (TdT-mediated dUTP Nick-End Labeling) for detecting apoptosis. Components Reagent Not Included 1.Cell sample Fixative Buffer (Polyformaldehyde dissolved in PBS with final concentration of 4%)(It is recommended to use Elabscience® E-IR-R113). Blocking Buffer (H2O2 dissolved in Deionized water with final concentration of 3%)(It is recommended to use Elabscience® E-IR-R115). Permeablilization Buffer (Triton-100 dissolved in 0.1% citrate sodium with final concentration of 0.1%)(It is recommended to use Elabscience® E-IR-R122). 2.Paraffin embedding Xylene, ethanol, PBS. Blocking Buffer (H2O2 dissolved in Deionized water with final concentration of 3%)(It is recommended to use Elabscience® E-IR-R115). 3.Freezing section Fixative Buffer (Polyformaldehyde dissolved in PBS with final concentration of 4%)(It is recommended to use Elabscience® E-IR-R113). Blocking Buffer (H2O2 dissolved in Deionized water with final concentration of 3%)(It is recommended to use Elabscience® E-IR-R115). Permeablilization Buffer (Triton-100 dissolved in 0.1% citrate sodium with final concentration of 0.1%)(It is recommended to use Elabscience® E-IR-R122). 4.Positive control DNase I 5.Other reagents PBS(It is recommended to use Elabscience® E-BC-R187). Hematoxylin (nuclear staining buffer, It is recommended to use Elabscience® E-IR-R120). Neutral Balsam(It is recommended to use Elabscience® E-IR-R118). Instructions 1. Proteinase K (50 x)[E-CK-A331C] is concentrated, diluted with PBS to 1 x working solution before use. For example: take 10 µL Proteinase K (50 x)[E-CK-A331C], add to 490 µL PBS, the mixture is 1xProteinase K working solution. 2. DAB Concentrate (20 x)[ E-CK-A331F] is concentrated, diluted with DAB Substrate[ E-CK-A331G] to 1 x working solution before use. For example: take 10 µL DAB Concentrate (20 x)[ E-CK-A331F], add to 190 µL DAB Substrate[ E-CK-A331G], the mixture is 1xDAB working solution. Storage Streptavidin-HRP [E-CK-A331D] stored at 2~8°C, other reagents stored at -20°C. Streptavidin-HRP[E-CK-A331D] and 20xDAB Concentrate [E-CK-A331F] should be stored in dark. Cautions 1. For maximal assay performance, this reagent should be used within 12 months. Avoid freeze / thaw cycles. 2. After washing the slides with PBS, please wipe dry the liquid around the tissue on the slides with absorbent paper. 3. Keep the sample moist during the experiment to prevent the failure of the experiment caused by dry slices. 4. Prepare the TdT enzyme working solution before use, it can be store on ice for short time, enzyme activity may lose after long-term preservation. 5. If the 20xDAB Concentrate became dark purple, please do not use it. 6. This kit is for research use only. For your safety and health, please wear lab clothes and gloves. Instructions should be followed strictly, changes of operation may result in unreliable results.

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Storage Note

This product can be stored at -20°C for 12 months with shading light.