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  • Title: Discovery of novel non-carboxylic acid 5-amino-4-cyanopyrazole derivatives as potent and highly selective LPA1R antagonists.
    Author: Sidduri A, Budd DC, Fuentes ME, Lambros T, Ren Y, Roongta V, Schoenfeld RC, Gillespie P, Stevenson CS, Truitt T, Qian Y.
    Journal: Bioorg Med Chem Lett; 2014 Sep 15; 24(18):4450-4454. PubMed ID: 25155385.
    Abstract:
    High throughput screening (HTS) of our chemical library identified 3-alkylamino-2-aryl-5H-imidazo[1,2,b]pyrazol-7-carbonitrile 1 as a potent antagonist of the LPA1 receptor (LPA1R). Further evaluation of this class of compounds indicated that LPA1R antagonist activity originated from the degradation of the parent molecule in DMSO during the assay conditions. Here, we describe the isolation and characterization of the degradation products and their LPA1R antagonist activity. We further profiled these novel non-carboxylic acid LPA1R antagonists and demonstrated their inhibition of LPA-induced proliferation and contraction of normal human lung fibroblasts (NHLF).
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