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Image-based screening for the identification of novel proteasome inhibitors.
Department of Medical Sciences, Division of Clinical Pharmacology, Uppsala University Hospital, Sweden.
Department of Medical Sciences, Division of Clinical Pharmacology, Uppsala University Hospital, Sweden.
Department of Medical Sciences, Division of Clinical Pharmacology, Uppsala University Hospital, Sweden.
Linköping University, Department of Medical and Health Sciences, Clinical Pharmacology. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Centre for Diagnostics, Department of Clinical Pharmacology.ORCID iD: 0000-0002-5371-3827
2007 (English)In: Journal of Biomolecular Screening, ISSN 1087-0571, E-ISSN 1552-454X, Vol. 12, no 2, 203-10 p.Article in journal (Refereed) Published
Abstract [en]

The proteasome is a new, interesting target in cancer drug therapy, and the proteasome inhibitor bortezomib has shown an effect in myeloma patients. It is of interest to efficiently discover and evaluate new proteasome inhibitors. The authors describe the development of an image-based screening assay for the identification of compounds with proteasome-inhibiting activity. The stably transfected human embryo kidney cell line HEK 293 ZsGreen Proteasome Sensor Cell Line expressing the ZsProSensor-1 fusion protein was used for screening and evaluation of proteasome inhibitors. Inhibition of the proteasome leads to accumulation of the green fluorescent protein ZsGreen, which is measured in the ArrayScan High Content Screening system, in which cell morphology is studied simultaneously. When screening the LOPAC(1280) substance library, several compounds with effect on the proteasome were found; among the hits were disulfiram and ammonium pyrrolidinedithiocarbamate (PDTC). Cytotoxic analysis of disulfiram and PDTC showed that the compounds induced cytotoxicity in the myeloma cell line RPMI 8226. The average Z' value for the assay was 0.66. The results indicate that the assay rapidly identifies new proteasome-inhibiting substances, and it will be further used as a tool for image-based screening of other chemically diverse compound libraries.

Place, publisher, year, edition, pages
2007. Vol. 12, no 2, 203-10 p.
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Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-69408DOI: 10.1177/1087057106297115PubMedID: 17208922OAI: oai:DiVA.org:liu-69408DiVA: diva2:427052
Available from: 2011-06-27 Created: 2011-06-27 Last updated: 2017-12-11

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Lövborg, Henrik

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