Abstract
We evaluated pazopanib (800 mg orally QD) in patients not eligible for intensive treatment with relapsed/refractory AML or at initial diagnosis. Patients receiving pazopanib for > 14 days were analyzed for safety, tolerability, and efficacy. Co-primary endpoints were cumulative response rate and reduction of bone marrow microvessel density. Twenty patients (median age 76 years, range 52–86) were treated. Fifteen had relapsed/refractory and five had newly diagnosed AML. Median ECOG performance status was 1 (range 1–3). Four patients had adverse, 15 intermediate, and 1 patient favorable cytogenetic/molecular risk (ELN 2010 criteria). The safety profile of pazopanib was as reported. The most common adverse events of any grade were gastrointestinal. Two patients achieved PR (blast reduction > 50%), 14 stable disease (SD), and 4 progressive disease. Median PFS was 65 days (95% CI 29–105). After the end of the study, 1 CRi and 1 CRp occurred on demethylating agents, and 1 CR upon alloSCT. In these patients, SD and improved general condition on pazopanib allowed therapy escalation. Median OS for the overall study population was 191 days (95% CI 87–435) and 1-year survival was 35%. There was no significant change in microvessel density. Clinical trial information: NCT01361334.
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Acknowledgments
We thank our study nurses and study administrators for their kind support.
Funding
This study was supported by a grant from GSK and Novartis Germany. The laboratories of G.L. and W.E.B. are supported by Deutsche Forschungsgemeinschaft, Cluster of Excellence: Cells in Motion (EXC 1003).
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T.K., S.K., C.S., and W.E.B. designed the study. T.K. and S.K. were principal investigators. E.W. and W.H. were involved in the MVD analysis. E.B., J.G., T.K., and S.K. were involved in the statistical analysis. T.K., S.K., C.S., M.C., J.-H. M., S.v.S., M.S., M.P., G.L., A.K., K.V., T.B., C.M.-T., and W.E.B. provided and treated patients. T.K., S.K., and W.E.B. wrote the manuscript. All authors revised and agreed to the manuscript.
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Institutional review board or independent ethics committee approval and written informed consent from all patients for being included in the study were obtained. The study was performed in accordance with the ethical principles of the Declaration of Helsinki and in compliance with national laws.
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Dr. Koschmieder declares Consultancy, Honoraria, and Research Funding by Novartis. Dr. Stelljes declares Pfizer Consultancy, Honoraria and Research Funding; MSD Consultancy; JAZZ Honoraria; Amgen Honoraria; Novartis Honoraria. Dr. Lenz reports the following: Celgene Corp. Consultancy, Honoraria, Travel, Accommodations, Expenses, Research Funding and Speakers Bureau; Janssen Consultancy, Honoraria, Travel, Accommodations, Expenses, Research Funding and Speakers Bureau; Roche Consultancy, Honoraria, Travel, Accomodations, Expenses, and Research Funding; Bayer Consultancy, Honoraria, Research Funding and Speakers Bureau; Novartis Research Funding; Gilead Consultancy and Honoraria. Dr. Brümmendorf reports Pfizer Consultancy and Research Funding, Novartis Consultancy and Research Funding, Takeda Consultancy, Janssen Consultancy, and Merck Consultancy. Dr. Müller-Tidow reports Pfizer Research Funding. Dr. Berdel reports research grants by GSK and Novartis. The other authors declare that they have no conflict of interest.
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Torsten Kessler and Steffen Koschmieder shared first authorship
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Kessler, T., Koschmieder, S., Schliemann, C. et al. Phase II clinical trial of pazopanib in patients with acute myeloid leukemia (AML), relapsed or refractory or at initial diagnosis without an intensive treatment option (PazoAML). Ann Hematol 98, 1393–1401 (2019). https://doi.org/10.1007/s00277-019-03651-9
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DOI: https://doi.org/10.1007/s00277-019-03651-9