Discovery of novel drug sensitivities in T-PLL by high-throughput ex vivo drug testing and mutation profiling

. 2018 Mar ; 32 (3) : 774-787. [epub] 20170814

Jazyk angličtina Země Velká Británie, Anglie Médium print-electronic

Typ dokumentu časopisecké články, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/pmid28804127

T-cell prolymphocytic leukemia (T-PLL) is a rare and aggressive neoplasm of mature T-cells with an urgent need for rationally designed therapies to address its notoriously chemo-refractory behavior. The median survival of T-PLL patients is <2 years and clinical trials are difficult to execute. Here we systematically explored the diversity of drug responses in T-PLL patient samples using an ex vivo drug sensitivity and resistance testing platform and correlated the findings with somatic mutations and gene expression profiles. Intriguingly, all T-PLL samples were sensitive to the cyclin-dependent kinase inhibitor SNS-032, which overcame stromal-cell-mediated protection and elicited robust p53-activation and apoptosis. Across all patients, the most effective classes of compounds were histone deacetylase, phosphoinositide-3 kinase/AKT/mammalian target of rapamycin, heat-shock protein 90 and BH3-family protein inhibitors as well as p53 activators, indicating previously unexplored, novel targeted approaches for treating T-PLL. Although Janus-activated kinase-signal transducer and activator of transcription factor (JAK-STAT) pathway mutations were common in T-PLL (71% of patients), JAK-STAT inhibitor responses were not directly linked to those or other T-PLL-specific lesions. Overall, we found that genetic markers do not readily translate into novel effective therapeutic vulnerabilities. In conclusion, novel classes of compounds with high efficacy in T-PLL were discovered with the comprehensive ex vivo drug screening platform warranting further studies of synergisms and clinical testing.

Departamento de Immunología Hospital Universitario de la Princesa Madrid Spain

Department 1 of Internal Medicine Center for Integrated Oncology CMMC Center for Molecular Medicine University of Cologne Germany

Department of Hemato oncology University Hospital Olomouc Olomouc Czech Republic

Department of Hematology Oncology Hemostaseology and Stem Cell Transplantation Faculty of Medicine RWTH Aachen University Aachen Germany

Department of Hematology Oulu University Hospital MRC Oulu University of Oulu Oulu Finland

Department of Mathematics and Statistics University of Turku Turku Finland

Department of Medicine 5 University Hospital Heidelberg Heidelberg Germany

Department of Medicine Division of Infectious Disease Helsinki University Central Hospital Helsinki Finland

Department of Translational Oncology and Molecular Therapy in Haematology and Oncology National Center for Tumor Diseases and German Cancer Research Center Heidelberg Germany

Division of Hematology Mayo Clinic Rochester MN USA

Genome Biology Unit European Molecular Biology Laboratory Heidelberg Germany

Helsinki University Central Hospital Laboratory of Genetics HUSLAB Helsinki Finland

Hematology Research Unit Helsinki Department of Clinical Chemistry and Hematology University of Helsinki and Helsinki University Hospital Comprehensive Cancer Center Helsinki Finland

Institut Curie INSERM U830 PSL Research University Paris France

Institute for Molecular Medicine Finland University of Helsinki Helsinki Finland

Nordlab Oulu Hematology Laboratory MRC Oulu Oulu University Hospital University of Oulu Oulu Finland

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