1. Feasibility of Long-term Proteasome Inhibition in Multiple Myeloma by in-class Transition From Bortezomib to Ixazomib
- Author
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Ralph V. Boccia, Kimberly Bogard, Stephen J. Noga, Robert M. Rifkin, Habte A. Yimer, Sudhir Manda, Haresh S. Jhangiani, Roger M. Lyons, Brittany Demers, Renda H. Ferrari, Suman Kambhampati, Dasha Cherepanov, Ruemu Ejedafeta Birhiray, Veena Charu, Christopher A. Yasenchak, Saulius Girnius, Jack Aiello, Presley Whidden, and Vickie Lu
- Subjects
Boron Compounds ,Male ,Cancer Research ,medicine.medical_specialty ,real-world community ,Population ,Glycine ,Article ,Ixazomib ,Bortezomib ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,iCT ,Internal medicine ,Antineoplastic Combined Chemotherapy Protocols ,medicine ,Clinical endpoint ,Humans ,education ,Survival rate ,Aged ,education.field_of_study ,business.industry ,electronic patient-reported outcomes ,Non-standard abbreviations: ePROs ,Hematology ,medicine.disease ,Survival Analysis ,Progression-Free Survival ,Regimen ,Treatment Outcome ,Oncology ,chemistry ,patient-reported outcomes ,030220 oncology & carcinogenesis ,medication adherence ,in-class transition ,Proteasome inhibitor ,oral therapy ,Female ,business ,Multiple Myeloma ,Proteasome Inhibitors ,Progressive disease ,duration of treatment ,030215 immunology ,medicine.drug - Abstract
Background The ongoing US MM-6 study is investigating in-class transition (iCT) from parenteral bortezomib-based induction to all-oral ixazomib-lenalidomide-dexamethasone (ixazomib-Rd) with the aim of increasing proteasome inhibitor (PI)-based treatment adherence/duration while maintaining quality of life (QoL) and improving outcomes. Patients and Methods US community sites are enrolling non-transplant-eligible newly diagnosed multiple myeloma (MM) patients with no evidence of progressive disease after 3 cycles of bortezomib-based therapy to receive ixazomib-Rd (up to 39 cycles or until progression/toxicity). Patients use mobile/wearable digital devices to collect actigraphy (activity/sleep) data and electronically complete QoL/treatment satisfaction/medication adherence questionnaires. Primary endpoint: progression-free survival (PFS); key secondary endpoints include response rates and therapy duration. Results At data cutoff, 84 patients had been treated (median age 73 years; 44% ≥ 75 years; 49% male; 15% black/African American; 10% Hispanic/Latino); 62% of patients remain on therapy. Mean duration of total PI therapy was 10.1 months and of ixazomib-Rd was 7.3 months. With 8 months median follow-up, 12-month PFS rate was 86% (95% confidence interval, 73–93) from both the start of bortezomib-based treatment and the start of ixazomib-Rd. Overall response rate was 62% (complete response [CR], 4%; very good partial response [VGPR], 25%; partial response [PR], 33%) after bortezomib-based induction and 70% (CR, 26%; VGPR, 29%; PR, 15%) after iCT. The ixazomib-Rd safety profile was consistent with previous clinical trial data. QoL/treatment satisfaction were maintained. Conclusion US MM-6 patients are representative of the real-world US MM population; iCT may permit prolonged PI-based therapy with promising efficacy, without impacting patients’ QoL/treatment satisfaction., Graphical abstract, While long-term proteasome inhibitor therapy improves outcomes in multiple myeloma, many patients cannot tolerate long-term treatment or may require/prefer to continue treatment outside the hospital/clinic. US MM-6 evaluates in-class transition from parenteral bortezomib- to oral ixazomib-based therapy in routine clinical practice. Preliminary results indicate feasibility, prolonged duration of therapy, and promising efficacy and treatment adherence/satisfaction.
- Published
- 2020