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A Simple, Robust Automated Multiplexed Cell-Based Assay Process for the Assessment of Mitochondrial Dysfunction and Cytotoxicity
EP20628
Poster Title: A Simple, Robust Automated Multiplexed Cell-Based Assay Process for the Assessment of Mitochondrial Dysfunction and Cytotoxicity
Submitted on 20 Dec 2013
Author(s): Brad Larson, Peter Banks, Tracy Worzella, Andrew Niles and Timothy Moeller
Affiliations: Biotek Instruments
Poster Views: 1,524
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Poster Information
Abstract: This poster demonstrates the utility of a multiplexed assay to assess cell membrane integrity changes (cytotoxicity), as well as mitochondrial function (ATP levels). Cytotoxicity is first assessed by measuring a distinct protease activity associated with necrosis using a fluorogenic peptide substrate (bis-AAF-R110) to measure “dead cell protease activity”. The substrate cannot cross the intact membrane of live cells and therefore gives no signal with viable cells. Mitochondrial function is then measured by adding an ATP detection reagent, resulting in cell lysis and generation of a luminescent signal proportional to the amount of ATP present. The two assay readouts used together can distinguish between compounds that exhibit mitochondrial toxicity versus overt cytotoxicity. Mitochondrial toxicity will result in a decrease in ATP production with little to no change in membrane integrity. A cytotoxic effect, such as primary necrosis, will also show a decrease in ATP but in conjunction with loss of membrane integrity. In addition, the multiplexed nature of the assay decreases data variability that could be seen when running these two assays sequentially.Summary: Recent studies have shown that an increasing number of drugs no longer on the market have negative effects on mitochondrial function in key organs such as the liver and heart. Therefore it is increasingly important to monitor the effects of lead compounds on mitochondrial function in relevant cell systems. The ability to incorporate a simple, rapid, multiplexed, predictive assay can make the detection of potential toxic effects easier to perform early on in the drug discovery process.Report abuse »
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