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• W2891167053 abstract "Abstract Purpose: p21-activated kinase 4 (PAK4) plays a significant biological and functional role in a number of malignancies, including multiple myeloma (MM). On the basis of our promising findings in MM, we here characterize PAK4 expression and role in WM cells, as well effect of dual PAK4-NAMPT inhibitor (KPT-9274) against WM cell growth and viability. Experimental Design: We have analyzed mRNA and protein expression levels of PAK4 in WM cells, and used loss-of-function approach to investigate its contribution to WM cell viability. We have further tested the in vitro and in vivo effect of KPT-9274 against WM cell growth and viability. Results: We report here high-level expression and functional role of PAK4 in WM, as demonstrated by shRNA-mediated knockdown; and significant impact of KPT-9274 on WM cell growth and viability. The growth inhibitory effect of KPT-9274 was associated with decreased PAK4 expression and NAMPT activity, as well as induction of apoptosis. Interestingly, in WM cell lines treated with KPT-9274, we detected a significant impact on DNA damage and repair genes. Moreover, we observed that apart from inducing DNA damage, KPT-9274 specifically decreased RAD51 and the double-strand break repair by the homologous recombination pathway. As a result, when combined with a DNA alkylating agents bendamustine and melphalan, KPT-9274 provided a synergistic inhibition of cell viability in WM cell lines and primary patient WM cells in vitro and in vivo. Conclusions: These results support the clinical investigation of KPT-9274 in combination with DNA-damaging agent for treatment of WM." @default.
• W2891167053 created "2018-09-27" @default.
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• W2891167053 date "2019-01-01" @default.
• W2891167053 modified "2023-10-18" @default.
• W2891167053 title "Dual PAK4-NAMPT Inhibition Impacts Growth and Survival, and Increases Sensitivity to DNA-Damaging Agents in Waldenström Macroglobulinemia" @default.
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• W2891167053 doi "https://doi.org/10.1158/1078-0432.ccr-18-1776" @default.
• W2891167053 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6320280" @default.
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