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JNJ-67856633 is effective and highly bioavailable in both mouse and rat tumors, and in some cases led to tumor stasis. JNJ-67856633 leads to potent in vivo pharmacodynamic shutdown in CD79b- as well as CARD11-mutant ABC-DLBCL models as measured by serum IL10 or uncleaved BCL10 levels in tumors[1][3].

Dose dependent inhibition of the generation of Tregs (CD4+CD25+FoxP3+) following CD3/28 stimulation was observed upon treatment with JNJ-67856633 suggesting a potential immune modulatory role of MALT1 inhibition[3].

[1]. Virtual meeting delivers first time drug structures [2]. A Phase 1, First-in-Human, Open-Label Study of the Safety, Pharmacokinetics, and Pharmacodynamics of JNJ-67856633, an Inhibitor of MALT1, in Participants with NHL and CLL [3]. Abstract 5690: Discovery of JNJ-67856633: A novel, first-in-class MALT1 protease inhibitor for the treatment of B cell lymphomas

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