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Thai H, Koiwai K, Shitara Y, Kazama H, Fau J, Semiond D, Veyrat‐Follet C. Model-based simulation to support the approval of isatuximab alone or with dexamethasone for the treatment of relapsed/refractory multiple myeloma in Japanese patients. CPT Pharmacometrics Syst Pharmacol 2023; 12:1846-1858. [PMID: 37002644 PMCID: PMC10725271 DOI: 10.1002/psp4.12947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 01/30/2023] [Accepted: 02/02/2023] [Indexed: 04/03/2023] Open
Abstract
This study aimed to support dosing regimen selection for isatuximab as a single agent or in combination with dexamethasone for Japanese patients with relapsed/refractory multiple myeloma (RRMM). A joint model characterizing the dynamics of serum M-protein kinetics and its association with progression-free survival (PFS) was developed using data from 201 evaluable Japanese and non-Japanese patients with RRMM enrolled in two monotherapy phase I/II trials, where Japanese patients (n = 31) received isatuximab at 10 or 20 mg/kg once weekly (qw) for 4 weeks then every 2 weeks (q2w) in subsequent cycles (10 or 20 mg/kg qw-q2w). Among non-Japanese patients, 38 received isatuximab 20 mg/kg qw-q2w in combination with dexamethasone. Trial simulations were then performed to evaluate the effect of the isatuximab dosing regimens on both serum M-protein and PFS with and without dexamethasone. The model identified instantaneous changes in serum M-protein as the best on-treatment predictor for PFS. Trial simulations demonstrated that 20 mg/kg qw-q2w induced a greater decrease (30% vs. 22%) of serum M-protein at week 8 and prolonged median PFS by 2.4 weeks compared with 10 mg/kg qw-q2w. Although Japanese patients did not receive isatuximab plus dexamethasone in the phase I/II trial, simulations predicted that isatuximab 20 mg/kg qw-q2w plus dexamethasone would induce a greater decrease (67% vs. 43%) of serum M-protein and a prolonged median PFS by 7.2 weeks compared with isatuximab alone. Trial simulations support the approved isatuximab 20 mg/kg qw-q2w regimen when administered as a single agent and in combination with dexamethasone in Japanese patients.
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Affiliation(s)
- Hoai‐Thu Thai
- Sanofi R&D, Data and Data ScienceTranslational Disease ModelingChilly‐MazarinFrance
| | - Kimiko Koiwai
- Translational Medicine and Early Development, SanofiChilly‐MazarinFrance
| | | | | | - Jean‐Baptiste Fau
- Translational Medicine and Early Development, SanofiChilly‐MazarinFrance
| | - Dorothée Semiond
- Translational Medicine and Early Development, SanofiCambridgeMassachusettsUSA
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Ocio EM, Perrot A, Bories P, San-Miguel JF, Blau IW, Karlin L, Martinez-Lopez J, Wang SY, Bringhen S, Marcatti M, Mateos MV, Rodriguez-Otero P, Oliva S, Nogai A, Le Roux N, Dong L, Macé S, Gassiot M, Fitzmaurice T, Oprea C, Moreau P. Efficacy and safety of isatuximab plus bortezomib, lenalidomide, and dexamethasone in patients with newly diagnosed multiple myeloma ineligible/with no immediate intent for autologous stem cell transplantation. Leukemia 2023; 37:1521-1529. [PMID: 37316728 PMCID: PMC10264885 DOI: 10.1038/s41375-023-01936-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 05/10/2023] [Accepted: 05/31/2023] [Indexed: 06/16/2023]
Abstract
Patients with newly diagnosed multiple myeloma (NDMM) ineligible for autologous stem cell transplantation (ASCT) have lower survival rates and may benefit from frontline regimens that include novel agents. This Phase 1b study (NCT02513186) evaluated preliminary efficacy, safety, and pharmacokinetics (PK) of isatuximab, an anti-CD38 monoclonal antibody, combined with bortezomib-lenalidomide-dexamethasone (Isa-VRd) in patients with NDMM ineligible for/with no intent for immediate ASCT. Overall, 73 patients received four 6-week induction cycles of Isa-VRd, then maintenance with Isa-Rd in 4-week cycles. In the efficacy population (n = 71), the overall response rate was 98.6%, with 56.3% achieving a complete response or better (sCR/CR), and 36/71 (50.7%) patients reaching minimal residual disease negativity (10-5 sensitivity). Grade ≥3 treatment-emergent adverse events (TEAEs) occurred in 79.5% (58/73) of patients but TEAEs leading to permanent study treatment discontinuation were reported in 14 (19.2%) patients. Isatuximab PK parameters were within the previously reported range, suggesting that VRd does not alter the PK of isatuximab. These data support additional studies of isatuximab in NDMM, such as the Phase 3 IMROZ study (Isa-VRd vs VRd).
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Affiliation(s)
- Enrique M Ocio
- University Hospital Marqués de Valdecilla (IDIVAL), University of Cantabria, Santander, Spain.
| | - Aurore Perrot
- CHU de Toulouse, IUCT-O, Université de Toulouse, UPS, Service d'Hématologie, Toulouse, France
| | - Pierre Bories
- Toulouse University Institute of Cancer-Oncopole, Toulouse, France
| | - Jesus F San-Miguel
- Clinica Universidad de Navarra, CCUN, CIMA, IDISNA, CIBERONC, Pamplona, Spain
| | | | - Lionel Karlin
- Hôpital Lyon Sud, Hospices Civils de Lyon, Pierre-Bénite, France
| | | | - Song-Yau Wang
- Department of Hematology and Oncology, University of Leipzig, Leipzig, Germany
| | - Sara Bringhen
- SSD Clinical Trial in Oncoematologia e Mieloma Multiplo, Division of Hematology, University of Torino, Azienda Ospedaliero-Universitaria Città della Salute e della Scienza di Torino, Torino, Italy
| | | | | | | | - Stefania Oliva
- Dipartimento di Oncologia ed Ematologia SC Ematologia 1 U, Torino, Italy
| | - Axel Nogai
- Charité Medical University, Berlin, Germany
| | - Nadia Le Roux
- Sanofi Research & Development on behalf of Altran, Vitry-sur-Seine, France
| | | | - Sandrine Macé
- Sanofi Translational Medicine, Chilly-Mazarin, France
| | - Matthieu Gassiot
- Sanofi Research & Development on behalf of Excelya, Montpellier, France
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Srimani JK, Diderichsen PM, Hanley MJ, Venkatakrishnan K, Labotka R, Gupta N. Population pharmacokinetic/pharmacodynamic joint modeling of ixazomib efficacy and safety using data from the pivotal phase III TOURMALINE‐MM1 study in multiple myeloma patients. CPT Pharmacometrics Syst Pharmacol 2022; 11:1085-1099. [PMID: 35598166 PMCID: PMC9381907 DOI: 10.1002/psp4.12815] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 04/27/2022] [Accepted: 05/03/2022] [Indexed: 01/04/2023] Open
Abstract
Ixazomib is an oral proteasome inhibitor approved in combination with lenalidomide and dexamethasone for the treatment of relapsed/refractory multiple myeloma (MM). Approval in the United States, Europe, and additional countries was based on results from the phase III TOURMALINE‐MM1 (C16010) study. Here, joint population pharmacokinetic/pharmacodynamic time‐to‐event (TTE) and discrete time Markov models were developed to describe key safety (rash and diarrhea events, and platelet counts) and efficacy (myeloma protein [M‐protein] and progression‐free survival [PFS]) outcomes observed in TOURMALINE‐MM1. Models reliably described observed safety and efficacy results; prior immunomodulatory drug therapy and race were significant covariates for diarrhea and rash events, respectively, whereas M‐protein dynamics were sufficiently characterized using TTE models of relapse and dropout. Moreover, baseline M‐protein was identified as a significant covariate for observed PFS. The developed framework represents an integrated approach to describing safety and efficacy with MM therapy, enabling the simulation of prospective trials and potential alternate dosing regimens.
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Affiliation(s)
- Jaydeep K. Srimani
- Takeda Development Center Americas, Inc. (TDCA) Lexington Massachusetts USA
| | | | - Michael J. Hanley
- Takeda Development Center Americas, Inc. (TDCA) Lexington Massachusetts USA
| | | | - Richard Labotka
- Takeda Development Center Americas, Inc. (TDCA) Lexington Massachusetts USA
| | - Neeraj Gupta
- Takeda Development Center Americas, Inc. (TDCA) Lexington Massachusetts USA
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