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Current Chemical Genomics 3, 33-41. In vitro viability and cytotoxicity testing and same-well multi-parametric combinations for high-throughput screening 2009

Niles, A.L., Moravec, R.A. and Riss, T.L.

Notes: The authors review the use of in vitro cytotoxicity testing in drug discovery to characterize the toxic potential of new chemical entities (nce) at the earliest stages of profiling. DOI: 10.2174/1875397300903010033 (4000)

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Am. J. Physiol. Cell Physiol. 295, C883-C896. Apoptosis-induced alkalinization by the Na+/H+ exchanger isoform 1 is mediated through phosphorylation of amino 2008

Grenier, A.L., Abu-Ihweij, K., Zhang, G., Ruppert, S.M., Boohaker, R., Slepkov, E.R., Pridemore, K., Ren, J.J., Fliegel, L. and Khaled, A.R.

Notes: The authors wanted to examine the role of plasma membrane protein Na+/H+ exchanger isoform 1 (NHE1) in apoptosis. API cells, a NHE1-deficient Chinese hamster ovary cell line, was cotransfected with wild-type NHE1 or mutant NHE1 constructs and destabilized yellow fluorescent protein (YFP). Cells were plated at a density of 1 × 104 cells/well in a 96-well plate with or without FBS. To induce apoptosis in the cells, serum was withdrawn for 24 hours. The ratio of dead-to-live cells was measured using the MultiTox-Fluor Multiplex Cytotoxicity Assay. Cell death was also determined by examining the loss of YFP fluorescence under a microscope. (3937)

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Anal. Biochem. 366, 197–206. A homogeneous assay to measure live and dead cells in the same sample by detecting different protease markers 2007

Niles, A.L., Moravec, R.A., Hesselberth, P.E., Scurria, M.A., Daily, W.J. and Riss, T.L.

Notes: The authors of this paper describe an assay that uses protease biomarkers to assess cell viability and cell death simultaneously in a population of cells. The assay detects an ubiquitous protease activity that is associated with live cells and a second protease activity that is associated with cells that have lost membrane integrity. The readouts are either fluorescent or fluorescent and luminescent. The assay can be performed in multiplex with other assays, such as caspase assays, to gain additional information on the cell population, and it is amenable to high-throughput screening. (3927)

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