Cell-cycle reprogramming for Pi3K inhibition overrides a relapse-specific C481s BTK mutation revealed by longitudinal functional genomics in mantle cell lymphoma
We have discovered the first relapse-specific BTK mutation in patients with MCL with acquired resistance, but not primary resistance, to ibrutinib, and demonstrated a rationale for targeting the proliferative resistant MCL cells by inhibiting CDK4 and the cell cycle in combination with ibrutinib in the presence of BTK(WT) or a PI3K inhibitor independent of BTK mutation. As drug resistance remains a major challenge and CDK4 and PI3K are dysregulated at a high frequency in human cancers, targeting CDK4 in genome-based combination therapy represents a novel approach to lymphoma and cancer therapy. Cancer Discov; 4(9); 1022-35. ©2014 AACR. This article is highlighted in the In This Issue feature, p. 973.
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