MALT1 small molecule inhibitors specifically suppress ABC-DLBCL in vitro and in vivo.
MALT1 small molecule inhibitors specifically suppress ABC-DLBCL in vitro and in vivo.
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DOI:
10.1016/j.ccr.2012.11.003
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发表时间:
2012-12-11
期刊:
影响因子:
50.3
通讯作者:
Melnick A
中科院分区:
文献类型:
--
作者:
Fontan L;Yang C;Kabaleeswaran V;Volpon L;Osborne MJ;Beltran E;Garcia M;Cerchietti L;Shaknovich R;Yang SN;Fang F;Gascoyne RD;Martinez-Climent JA;Glickman JF;Borden K;Wu H;Melnick A
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.
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