HeLa cells treated to induce apoptosis and imaged. Untreated (Left) and staurosporine-treated (Right) HeLa cells stained using the Invitrogen Molecular Probes Click-iT TUNEL Alexa Fluor 594 Imaging Assay, for Microscopy & HCS and Invitrogen Molecular Probes Hoechst 33342. Cells were imaged using a Thermo Scientific ArrayScan VTI HCS instrument, and fluorescence intensities and count ratios were measured using Thermo Scientific HCS Studio Software.
HCS Apoptosis—TUNEL Assay
Optimized, automated assays for HCS
The later stages of apoptosis are characterized by changes in nuclear morphology, including chromatin condensation, degradation of nuclear envelope, and DNA strand breaks. TUNEL assays are the most widely used method to detect apoptotic DNA fragmentation in tissue samples and also work well for cultured cells. This assay uses a nuclear stain to identify cells and a TUNEL label to measure DNA strand breaks. The Invitrogen Click-iT TUNEL Alexa Fluor Imaging Assay kits are fast and efficient and offer precise, quantitative data even with high levels of apoptotic cells. The kits are optimized for HCS and provide a choice of three wavelength options to aid in multiplexing with other cellular measurements.
Automatically measured properties
- Fluorescence intensity, morphology, and count values for each object
- Fluorescence intensity, morphology, and count values of spots in different cell regions
- Average fluorescence intensity difference and ratios between different regions for each cell
- Intensity and count ratio between channels within different regions for each cell
TUNEL assay images
Sample experimental data
Dose-response plots for a variety of compounds and cell types using Invitrogen Molecular Probes Click-iT TUNEL Alexa Fluor 647 to measure apoptosis. Responses were measured automatically using Thermo Scientific ArrayScan VTI with Thermo Scientific HCS Studio 2.0 Cell Analysis Software and plotted using GraphPad Prism software.
HCS reagents optimized for use with your HCS platform
HCS application notes
For Research Use Only. Not for use in diagnostic procedures.