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Bioorg Med Chem Lett. 2013 Jan 1;23(1):340-5. doi: 10.1016/j.bmcl.2012.10.080. Epub 2012 Oct 24.

Identification of inhibitors against interaction between pro-inflammatory sPLA2-IIA protein and integrin αvβ3.

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  • 1Department of Chemistry, University of California, Davis, CA 95616, United States.


Increased concentrations of secreted phospholipase A2 type IIA (sPLA2-IIA), have been found in the synovial fluid of patients with rheumatoid arthritis. It has been shown that sPLA2-IIA specifically binds to integrin αvβ3, and initiates a signaling pathway that leads to cell proliferation and inflammation. Therefore, the interaction between integrin and sPLA2-IIA could be a potential therapeutic target for the treatment of proliferation or inflammation-related diseases. Two one-bead-one-compound peptide libraries were constructed and screened, and seven target hits were identified. Herein we report the identification, synthesis, and biological testing of two pyrazolylthiazole-tethered peptide hits and their analogs. Biological assays showed that these compounds were able to suppress the sPLA2-IIA-integrin interaction and sPLA2-IIA-induced migration of monocytic cells and that the blockade of the sPLA2-IIA-integrin binding was specific to sPLA2-IIA and not to the integrin.

Copyright © 2012. Published by Elsevier Ltd.

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