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- W2045166000 abstract "We report here the miniaturization, development, and implementation of a homogeneous 384-well fluorescence intensity high-throughput screening (HTS) assay for identifying mitogen-activated protein kinase (MAPK) phosphatase-1 (MKP-1) dual-specificity phosphatase inhibitors. As part of the National Institutes of Health (NIH) Molecular Libraries Screening Center Network (MLSCN), the MKP-1 assay was utilized to screen an NIH diversity library of 65,239 compounds for inhibitors of MKP-1 activity at 10 microM and was also used to confirm the concentration dependence of active agents identified in the primary screen. We observed 100 (0.15%) compounds that inhibited MKP-1 in vitro by > or =50% at 10 microM in the primary assay, and 46 of the 100 compounds were confirmed as concentration-dependent inhibitors of MKP-1 with 50% inhibitory concentration (IC(50)) values of <50 microM; four exhibited IC(50) values <1.0 microM, six produced IC(50) values in the 1-10 microM range, and 36 produced IC(50) values in the 10-50 microM range. A clustering and classification analysis of the compound structures of the 46 confirmed MKP-1 inhibitors produced 29 singleton structures and seven clusters of related structures. Some MKP-1 inhibitors were members of structural classes or contained substructure pharmacophores that previously were reported to inhibit either MKP-1 or other protein tyrosine phosphatases, validating the HTS assay. Importantly, we have identified several attractive and novel MKP-1 inhibitor structures that warrant further investigation as potential probes to study the biology of MKP-1 and its role in controlling the amplitude and/or duration of MAPK signaling, cell survival, and tumor progression." @default.
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- W2045166000 date "2007-06-01" @default.
- W2045166000 modified "2023-09-23" @default.
- W2045166000 title "Development and Implementation of a 384-Well Homogeneous Fluorescence Intensity High-Throughput Screening Assay to Identify Mitogen-Activated Protein Kinase Phosphatase-1 Dual-Specificity Protein Phosphatase Inhibitors" @default.
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- W2045166000 doi "https://doi.org/10.1089/adt.2007.066" @default.
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