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Poirier M, Awale M, Roelli MA, Giuffredi GT, Ruddigkeit L, Evensen L, Stooss A, Calarco S, Lorens JB, Charles RP, Reymond JL. Identifying Lysophosphatidic Acid Acyltransferase β (LPAAT-β) as the Target of a Nanomolar Angiogenesis Inhibitor from a Phenotypic Screen Using the Polypharmacology Browser PPB2. ChemMedChem 2018; 14:224-236. [PMID: 30520265 DOI: 10.1002/cmdc.201800554] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Indexed: 12/11/2022]
Abstract
By screening a focused library of kinase inhibitor analogues in a phenotypic co-culture assay for angiogenesis inhibition, we identified an aminotriazine that acts as a cytostatic nanomolar inhibitor. However, this aminotriazine was found to be completely inactive in a whole-kinome profiling assay. To decipher its mechanism of action, we used the online target prediction tool PPB2 (http://ppb2.gdb.tools), which suggested lysophosphatidic acid acyltransferase β (LPAAT-β) as a possible target for this aminotriazine as well as several analogues identified by structure-activity relationship profiling. LPAAT-β inhibition (IC50 ≈15 nm) was confirmed in a biochemical assay and by its effects on cell proliferation in comparison with a known LPAAT-β inhibitor. These experiments illustrate the value of target-prediction tools to guide target identification for phenotypic screening hits and significantly expand the rather limited pharmacology of LPAAT-β inhibitors.
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Affiliation(s)
- Marion Poirier
- Department of Chemistry and Biochemistry, National Center of Competence in Research NCCR TransCure, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Mahendra Awale
- Department of Chemistry and Biochemistry, National Center of Competence in Research NCCR TransCure, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Matthias A Roelli
- Institute of Biochemistry and Molecular Medicine, National Center of Competence in Research NCCR TransCure, University of Bern, Bühlstrasse 28, 3000, Bern 9, Switzerland
| | - Guy T Giuffredi
- Department of Chemistry and Biochemistry, National Center of Competence in Research NCCR TransCure, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Lars Ruddigkeit
- Department of Chemistry and Biochemistry, National Center of Competence in Research NCCR TransCure, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Lasse Evensen
- Department of Biomedicine, Centre for Cancer Biomarkers (CCBIO), University of Bergen, Jonas Lies vei 91, 5009, Bergen, Norway
| | - Amandine Stooss
- Institute of Biochemistry and Molecular Medicine, National Center of Competence in Research NCCR TransCure, University of Bern, Bühlstrasse 28, 3000, Bern 9, Switzerland
| | - Serafina Calarco
- Institute of Biochemistry and Molecular Medicine, National Center of Competence in Research NCCR TransCure, University of Bern, Bühlstrasse 28, 3000, Bern 9, Switzerland
| | - James B Lorens
- Department of Biomedicine, Centre for Cancer Biomarkers (CCBIO), University of Bergen, Jonas Lies vei 91, 5009, Bergen, Norway
| | - Roch-Philippe Charles
- Institute of Biochemistry and Molecular Medicine, National Center of Competence in Research NCCR TransCure, University of Bern, Bühlstrasse 28, 3000, Bern 9, Switzerland
| | - Jean-Louis Reymond
- Department of Chemistry and Biochemistry, National Center of Competence in Research NCCR TransCure, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
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