alexa MALT1 small molecule inhibitors specifically suppress ABC-DLBCL in vitro and in vivo.
Psychiatry

Psychiatry

Journal of Addiction Research & Therapy

Author(s): Fontan L, Yang C, Kabaleeswaran V, Volpon L, Osborne MJ,

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Abstract MALT1 cleavage activity is linked to the pathogenesis of activated B cell-like diffuse large B cell lymphoma (ABC-DLBCL), a chemoresistant form of DLBCL. We developed a MALT1 activity assay and identified chemically diverse MALT1 inhibitors. A selected lead compound, MI-2, featured direct binding to MALT1 and suppression of its protease function. MI-2 concentrated within human ABC-DLBCL cells and irreversibly inhibited cleavage of MALT1 substrates. This was accompanied by NF-κB reporter activity suppression, c-REL nuclear localization inhibition, and NF-κB target gene downregulation. Most notably, MI-2 was nontoxic to mice, and displayed selective activity against ABC-DLBCL cell lines in vitro and xenotransplanted ABC-DLBCL tumors in vivo. The compound was also effective against primary human non-germinal center B cell-like DLBCLs ex vivo. Copyright © 2012 Elsevier Inc. All rights reserved.
This article was published in Cancer Cell and referenced in Journal of Addiction Research & Therapy

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