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Thoren K, Menad S, Nouadje G, Macé S. Isatuximab-Specific Immunofixation Electrophoresis Assay to Remove Interference in Serum M-Protein Measurement in Patients with Multiple Myeloma. J Appl Lab Med 2024; 9:661-671. [PMID: 38573925 DOI: 10.1093/jalm/jfae028] [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: 09/20/2023] [Accepted: 02/26/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND Isatuximab, an IgG-kappa (IgGκ) anti-cluster of differentiation 38 (CD38) monoclonal antibody approved for use in patients with relapsed or refractory multiple myeloma (MM), can potentially interfere with the visualization of endogenous monoclonal protein (M-protein) on standard immunofixation electrophoresis (IFE) and lead to inaccurate classification of a patient's response to therapy. The Hydrashift 2/4 isatuximab IFE assay (Hydrashift isatuximab assay) removes isatuximab interference from IFE. Using samples from patients enrolled in clinical trials of isatuximab-based therapy for MM, we demonstrate how the Hydrashift isatuximab assay improves the ability to detect residual M-protein and offer recommendations for when the assay is most useful. METHODS Samples from 141 patients with a variety of known M-protein isotypes were selected and analyzed by standard IFE and the Hydrashift isatuximab assay. A positive control containing isatuximab was run on every standard IFE and Hydrashift gel. RESULTS The Hydrashift isatuximab assay reliably shifted the migration of isatuximab in patient samples. Standard IFE was adequate for determining 104 patients' M-protein status, and the Hydrashift isatuximab assay confirmed these results. In samples from 37 patients with a history of IgGκ MM and a single IgGκ band visible on standard IFE near the isatuximab migration site, the Hydrashift isatuximab assay was able to separate isatuximab from endogenous M-protein, identifying residual M-protein in 17 samples and preventing false-positive interpretations of standard IFE in 20 samples. CONCLUSIONS The Hydrashift isatuximab assay is most useful in patients with known IgGκ MM when a single IgGκ band appears near the isatuximab migration site on standard IFE during isatuximab-based therapy. CLINICALTRIALS.GOV REGISTRATION NUMBERS NCT03275285 and NCT03319667.
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Affiliation(s)
- Katie Thoren
- Memorial Sloan Kettering Cancer Center, New York, NY, United States
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2
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Leleu X, Hulin C, Lambert J, Bobin A, Perrot A, Karlin L, Roussel M, Montes L, Cherel B, Chalopin T, Slama B, Chretien ML, Laribi K, Dingremont C, Roul C, Mariette C, Rigaudeau S, Calmettes C, Dib M, Tiab M, Vincent L, Delaunay J, Santagostino A, Macro M, Bourgeois E, Orsini-Piocelle F, Gay J, Bareau B, Bigot N, Vergez F, Lebreton P, Tabrizi R, Waultier-Rascalou A, Frenzel L, Le Calloch R, Chalayer E, Braun T, Lachenal F, Corm S, Kennel C, Belkhir R, Bladé JS, Joly B, Richez-Olivier V, Gardeney H, Demarquette H, Robu-Cretu D, Garderet L, Newinger-Porte M, Kasmi A, Royer B, Decaux O, Arnulf B, Belhadj K, Touzeau C, Mohty M, Manier S, Moreau P, Avet-Loiseau H, Corre J, Facon T. Isatuximab, lenalidomide, dexamethasone and bortezomib in transplant-ineligible multiple myeloma: the randomized phase 3 BENEFIT trial. Nat Med 2024:10.1038/s41591-024-03050-2. [PMID: 38830994 DOI: 10.1038/s41591-024-03050-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Accepted: 05/08/2024] [Indexed: 06/05/2024]
Abstract
CD38-targeting immunotherapy is approved in combination with lenalidomide and dexamethasone in patients with newly diagnosed multiple myeloma (NDMM) that are transplant ineligible (TI) and is considered the best standard of care (SOC). To improve current SOC, we evaluated the added value of weekly bortezomib (V) to isatuximab plus lenalidomide and dexamethasone (IsaRd versus Isa-VRd). This Intergroupe Francophone of Myeloma phase 3 study randomized 270 patients with NDMM that were TI, aged 65-79 years, to IsaRd versus Isa-VRd arms. The primary endpoint was a minimal residual disease (MRD) negativity rate at 10-5 by next-generation sequencing at 18 months from randomization. Key secondary endpoints included response rates, MRD assessment rates, survival and safety. The 18-month MRD negativity rates at 10-5 were reported in 35 patients (26%, 95% confidence interval (CI) 19-34) in IsaRd versus 71 (53%, 95% CI 44-61) in Isa-VRd (odds ratio for MRD negativity 3.16, 95% CI 1.89-5.28, P < 0.0001). The MRD benefit was consistent across subgroups at 10-5 and 10-6, and was already observed at month 12. The proportion of patients with complete response or better at 18 months was higher with Isa-VRd (58% versus 33%; P < 0.0001), as was the proportion of MRD negativity and complete response or better (37% versus 17%; P = 0.0003). At a median follow-up of 23.5 months, no difference was observed for survival times (immature data). The addition of weekly bortezomib did not significantly affect the relative dose intensity of IsaRd. Isa-VRd significantly increased MRD endpoints, including the 18-month negativity rate at 10-5, the primary endpoint, compared with IsaRd. This study proposes Isa-VRd as a new SOC for patients with NDMM that are TI. ClinicalTrials.gov identifier: NCT04751877 .
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Affiliation(s)
- Xavier Leleu
- Hematology, CIC 1082, U1313, CHU, University, Poitiers, France.
| | | | | | - Arthur Bobin
- Hematology, CIC 1082, U1313, CHU, University, Poitiers, France
| | - Aurore Perrot
- University Hospital, iUCT Oncopole, Toulouse, France
| | | | | | | | | | | | | | - Marie-Lorraine Chretien
- Hematology, University Hospital, Inserm U1231, University of Burgundy Franche-Comté, Dijon, France
| | | | | | | | | | | | | | | | - Mourad Tiab
- Hematology, CH Departemental de La Roche-sur-Yon, La Roche-sur-Yon, France
| | | | | | | | | | | | | | - Julie Gay
- Hematology, CH de la côte basque, Bayonne, France
| | - Benoit Bareau
- Hematology, Les Hôpitaux Privés Rennais Cesson Sévigné - Vivalto Santé, Cesson Sévigné, France
| | | | - François Vergez
- Unit for Genomics in Myeloma, iUCT Oncopole, Toulouse, France
| | | | - Reza Tabrizi
- Hematology, CHI de Mont De Marsan, Mont-de-Marsan, France
| | | | | | - Ronan Le Calloch
- Hematology, CH de Cornouaille, Quimper Concarneau, Concarneau, France
| | | | | | | | - Selim Corm
- Medipole de Savoie, Challes les Eaux, France
| | | | - Rakiba Belkhir
- Rheumatology, Hopital Bicetre, AP-HP, Universite Paris Saclay, Paris, France
| | | | | | | | - Helene Gardeney
- Hematology, CIC 1082, U1313, CHU, University, Poitiers, France
| | | | | | | | | | | | | | - Olivier Decaux
- Hematology, UMR U1236, University Hospital, Rennes, France
| | | | | | | | - Mohamad Mohty
- Hematology, Sorbonne University, Saint-Antoine Hôpital (AP-HP), UMRs 938, Paris, France
| | - Salomon Manier
- Hematology, University Hospital Inserm U-S1277 and CNRS UMR9020, Lille, France
| | | | | | - Jill Corre
- Unit for Genomics in Myeloma, iUCT Oncopole, Toulouse, France
| | - Thierry Facon
- Hematology, University Hospital Inserm U-S1277 and CNRS UMR9020, Lille, France
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Quach H, Parmar G, Mateos MV, Ailawadhi S, Leleu X. Recent Developments in Convenience of Administration of the Anti-CD38 Antibody Isatuximab: Subcutaneous Delivery and Fast Intravenous Infusion in Patients With Multiple Myeloma. CLINICAL LYMPHOMA, MYELOMA & LEUKEMIA 2024; 24:358-363. [PMID: 38519329 DOI: 10.1016/j.clml.2024.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 02/08/2024] [Indexed: 03/24/2024]
Abstract
Isatuximab-based combinations are among the accepted standard-of-care regimens for early-line treatment of patients with relapsed/refractory multiple myeloma (RRMM), based on the results of the Phase 3 ICARIA-MM and IKEMA trials. Further study findings have shown benefit with Isa-based combinations in patients with newly diagnosed MM, as reported from the randomized GMMG-HD7 and CONCEPT trials. Isa is currently approved in various countries for intravenous (IV) administration in patients with RRMM. A more convenient route of administration, such as subcutaneous (SC) injection, and faster IV infusion may substantially increase convenience of treatment. In this review, we outline evidence emerging from clinical trials that shows increasing clinical applicability of Isa across the MM therapeutic spectrum. We then review recent study results demonstrating that new treatment modalities, either SC Isa administration via an on-body delivery system (OBDS) or fast, 30-minute, fixed-volume IV infusion, are safe and effective, and enhance convenience of treatment with Isa for MM patients and healthcare providers. In the recently reported Phase 1b study, the safety profile and efficacy of Isa administered SC plus pomalidomide-dexamethasone were comparable to those observed with Isa administered IV plus pomalidomide-dexamethasone in the control arm and in the ICARIA-MM trial. Analysis of patient-reported outcomes indicated patient confidence in SC Isa administration and satisfaction with treatment delivery by OBDS. These findings point to SC administration as the preferred route for future treatment with Isa-based combinations, as well as to the use of fast, 30-minute IV infusions in settings where SC administration of Isa might not be available.
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Affiliation(s)
- Hang Quach
- Clinical Haematology Service, St Vincent's Hospital Melbourne, University of Melbourne, Vic, Australia.
| | - Gurdeep Parmar
- Illawarra Cancer Care Centre, Wollongong, NSW, Australia
| | - Maria-Victoria Mateos
- University Hospital of Salamanca and Cancer Research Center (IBMCC-CSICUSAL), Salamanca, Spain
| | | | - Xavier Leleu
- Service d'Hématologie et Thérapie Cellulaire, CHU and CIC Inserm 1402, Poitiers Cedex, France
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Liu W, Yu J, Sun K, Song Q, Li Y, He Y, Wang Y, Xu G, Wang C, Chen B. Preclinical characterization of a novel investigational monoclonal antibody CM313 with potent CD38-positive cell killing activity. Front Immunol 2024; 15:1410457. [PMID: 38765013 PMCID: PMC11099226 DOI: 10.3389/fimmu.2024.1410457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Accepted: 04/19/2024] [Indexed: 05/21/2024] Open
Abstract
Introduction CM313 is currently under clinical investigation for treatments of multiple myeloma, systemic lupus erythematosus, and immune thrombocytopenia. We aimed to report the preclinical profile of the novel therapeutic anti-CD38 monoclonal antibody (mAb) CM313, with an emphasis on the difference with other CD38-targeting mAb. Methods The binding of CM313 to CD38 recombinant protein across species was assessed using ELISA. The binding of CM313 to CD38-positive (CD38+) cells was detected using flow cytometry assays. CM313-induced complement-dependent cytotoxicity (CDC), antibody-dependent cellular cytotoxicity (ADCC), antibody-dependent cellular phagocytosis (ADCP) and apoptosis on different CD38+ cells were assessed by LDH release assays or flow cytometry assays. The effect of CM313 on CD38 enzymatic activity was measured using fluorescence spectroscopy. CM313 immunotoxicity in human blood was assessed using flow cytometry assays, ELISA, and LDH release assays. Anti-tumor activity of CM313 was assessed in multiple mouse xenograft models. Safety profile of CM313 were evaluated in cynomolgus monkeys and human CD38 transgenic (B-hCD38) mice. Results There exist unique sequences at complementarity-determining regions (CDR) of CM313, which facilitates its affinity to CD38 is consistently higher across a spectrum of CD38+ cell lines than daratumumab. In vitro studies showed that CM313 induces comparable killing activity than daratumumab, including ADCC, CDC, ADCP, apoptosis induced by Fc-mediated cross-linking, and effectively inhibited the enzymatic activity of CD38. However, CM313 showed more potent CDC than isatuximab. In vivo, CM313 dose-dependently inhibited xenograft tumor growth, both as a monotherapy and in combination with dexamethasone or lenalidomide. Furthermore, CM313 was well tolerated with no drug-related clinical signs or off-target risks, as evidenced by 4-week repeat-dose toxicology studies in cynomolgus monkeys and B-hCD38 mice, with the later study showing no observed adverse effect level (NOAEL) of 300mg/kg once weekly. Discussion CM313 is a novel investigational humanized mAb with a distinct CDR sequence, showing comparable killing effects with daratumumab and stronger CDC activity than isatuximab, which supports its clinical development.
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Affiliation(s)
- Wei Liu
- Research and Development Department, Keymed Biosciences (Chengdu) Limited, Chengdu, China
| | - Juntao Yu
- Research and Development Department, Keymed Biosciences (Chengdu) Limited, Chengdu, China
| | - Kaiwen Sun
- Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, MS, United States
| | - Qin Song
- Research and Development Department, Keymed Biosciences (Chengdu) Limited, Chengdu, China
| | - Yuling Li
- Research and Development Department, Keymed Biosciences (Chengdu) Limited, Chengdu, China
| | - Yanyun He
- Research and Development Department, Keymed Biosciences (Chengdu) Limited, Chengdu, China
| | - Yanrong Wang
- Research and Development Department, Keymed Biosciences (Chengdu) Limited, Chengdu, China
| | - Gang Xu
- Research and Development Department, Keymed Biosciences (Chengdu) Limited, Chengdu, China
| | - Changyu Wang
- Research and Development Department, Keymed Biosciences (Chengdu) Limited, Chengdu, China
| | - Bo Chen
- Research and Development Department, Keymed Biosciences (Chengdu) Limited, Chengdu, China
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Barbieri E, Martino EA, Rivolti E, Quaresima M, Vigna E, Neri A, Morabito F, Gentile M. Anti-CD38 monoclonal antibodies in multiple myeloma with gain/amplification of chromosome arm 1q: a review of the literature. Expert Opin Biol Ther 2024; 24:365-381. [PMID: 38757726 DOI: 10.1080/14712598.2024.2357382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Accepted: 05/15/2024] [Indexed: 05/18/2024]
Abstract
INTRODUCTION Gain/amplification of 1q (+1q) represents one of the most prevalent cytogenetic abnormalities (CAs) observed in multiple myeloma (MM). Historical studies predating the advent of anti-CD38 monoclonal antibodies (moAbs) implicated + 1q in poor prognoses, prompting its integration into novel staging systems. However, with the emergence of daratumumab and isatuximab, two pivotal anti-CD38 moAbs, the landscape of MM therapy has undergone a profound transformation. AREAS COVERED This review encompasses a comprehensive analysis of diverse study methodologies, including observational investigations, clinical trials, meta-analyses, and real-world database analyses. By synthesizing these data sources, we aim to provide an overview of the current understanding of + 1q in the context of anti-CD38 moAbs therapies. EXPERT OPINION Despite the paucity of available data, evidence suggests a potential mitigating effect of daratumumab on the adverse prognostic implications of + 1q. However, this benefit seems to diminish in patients harboring ≥ 4 copies or with concurrent high-risk CAs. On the other hand, isatuximab demonstrated promising outcomes in the relapsed-refractory setting for + 1q MM patients. Nevertheless, direct comparison between the two compounds is currently challenging. The current evidence firmly supports the integration of anti-CD38 moAb-based therapies as the standard of care for + 1q patients, pending further elucidation.
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Affiliation(s)
- Emiliano Barbieri
- Clinical and Experimental Medicine PhD Program, University of Modena and Reggio Emilia, Modena, Italy
| | | | - Elena Rivolti
- Hematology Unit, Azienda Unità Sanitaria Locale-IRCCS, Reggio Emilia, Italy
| | - Micol Quaresima
- Hematology Unit, Azienda Unità Sanitaria Locale-IRCCS, Reggio Emilia, Italy
| | - Ernesto Vigna
- Hematology Unit, Azienda Ospedaliera Annunziata, Cosenza, Italy
| | - Antonino Neri
- Scientific Directorate, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Italy
| | | | - Massimo Gentile
- Hematology Unit, Azienda Ospedaliera Annunziata, Cosenza, Italy
- Department of Pharmacy, Health and Nutritional Science, University of Calabria, Rende, Italy
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Han X, Jiang X, He J, Zheng G, Xiong Y, Wen Y, Yang Y, He D, Chen Q, Zhao Y, Li Y, Wu W, Cai Z. Clinical outcomes of pomalidomide-based and daratumumab-based therapies in patients with relapsed/refractory multiple myeloma: A real-world cohort study in China. Cancer Med 2024; 13:e7232. [PMID: 38698679 PMCID: PMC11066492 DOI: 10.1002/cam4.7232] [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: 01/18/2024] [Revised: 04/14/2024] [Accepted: 04/18/2024] [Indexed: 05/05/2024] Open
Abstract
BACKGROUND Comparative investigations evaluating the efficacy of pomalidomide-based (Pom-based) versus daratumumab-based (Dara-based) therapies in patients with relapsed/refractory multiple myeloma (RRMM) remain scarce, both in randomized controlled trials and real-world studies. METHODS This retrospective cohort study included 140 RRMM patients treated with Pom-based or Dara-based or a combination of pomalidomide and daratumumab (DPd) regimens in a Chinese tertiary hospital between December 2018 and July 2023. RESULTS The overall response rates (ORR) for Pom-based (n = 48), Dara-based (n = 68), and DPd (n = 24) groups were 57.8%, 84.6%, and 75.0%, respectively (p = 0.007). At data cutoff on August 1, 2023, the median progression-free survival (PFS) was 5.7 months (95% CI: 5.0-6.5) for the Pom-based group, 10.5 months (5.2-15.8) for the Dara-based group, and 6.7 months (4.0-9.3) for the DPd group (p = 0.056). Multivariate analysis identified treatment regimens (Dara-based vs. Pom-based, DPd vs. Pom-based) and Eastern Cooperative Oncology Group performance status (ECOG PS) as independent prognostic factors for PFS. In the subgroups of patients aged >65 years, with ECOG PS ≥2, lines of therapy ≥2, extramedullary disease or double-refractory disease (refractory to both lenalidomide and proteasome inhibitors), the superiority of Dara-based regimens over Pom-based regimens was not evident. A higher incidence of infections was observed in patients receiving Dara-based and DPd regimens (Pom-based 39.6% vs. Dara-based 64.7% vs. DPd 70.8%, p = 0.009). CONCLUSIONS In real-world settings, Pom-based, Dara-based, and DPd therapies exhibited favorable efficacy in patients with RRMM. Dara-based therapy yielded superior clinical response and PFS compared to Pom-based therapy.
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Affiliation(s)
- Xiaoyan Han
- Department of Hematology and Bone Marrow Transplantation CenterThe First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Xincheng Jiang
- Department of Hematology and Bone Marrow Transplantation CenterThe First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Jingsong He
- Department of Hematology and Bone Marrow Transplantation CenterThe First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Gaofeng Zheng
- Department of Hematology and Bone Marrow Transplantation CenterThe First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Yaqin Xiong
- Department of Hematology and Bone Marrow Transplantation CenterThe First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Yanling Wen
- Department of Hematology and Bone Marrow Transplantation CenterThe First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Yang Yang
- Department of Hematology and Bone Marrow Transplantation CenterThe First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Donghua He
- Department of Hematology and Bone Marrow Transplantation CenterThe First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Qingxiao Chen
- Department of Hematology and Bone Marrow Transplantation CenterThe First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Yi Zhao
- Department of Hematology and Bone Marrow Transplantation CenterThe First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Yi Li
- Department of Hematology and Bone Marrow Transplantation CenterThe First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Wenjun Wu
- Department of Hematology and Bone Marrow Transplantation CenterThe First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
| | - Zhen Cai
- Department of Hematology and Bone Marrow Transplantation CenterThe First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhouZhejiangChina
- Institute of Hematology, Zhejiang UniversityHangzhouZhejiangChina
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Ünlü S, Sánchez Navarro BG, Cakan E, Berchtold D, Meleka Hanna R, Vural S, Vural A, Meisel A, Fichtner ML. Exploring the depths of IgG4: insights into autoimmunity and novel treatments. Front Immunol 2024; 15:1346671. [PMID: 38698867 PMCID: PMC11063302 DOI: 10.3389/fimmu.2024.1346671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 02/29/2024] [Indexed: 05/05/2024] Open
Abstract
IgG4 subclass antibodies represent the rarest subclass of IgG antibodies, comprising only 3-5% of antibodies circulating in the bloodstream. These antibodies possess unique structural features, notably their ability to undergo a process known as fragment-antigen binding (Fab)-arm exchange, wherein they exchange half-molecules with other IgG4 antibodies. Functionally, IgG4 antibodies primarily block and exert immunomodulatory effects, particularly in the context of IgE isotype-mediated hypersensitivity reactions. In the context of disease, IgG4 antibodies are prominently observed in various autoimmune diseases combined under the term IgG4 autoimmune diseases (IgG4-AID). These diseases include myasthenia gravis (MG) with autoantibodies against muscle-specific tyrosine kinase (MuSK), nodo-paranodopathies with autoantibodies against paranodal and nodal proteins, pemphigus vulgaris and foliaceus with antibodies against desmoglein and encephalitis with antibodies against LGI1/CASPR2. Additionally, IgG4 antibodies are a prominent feature in the rare entity of IgG4 related disease (IgG4-RD). Intriguingly, both IgG4-AID and IgG4-RD demonstrate a remarkable responsiveness to anti-CD20-mediated B cell depletion therapy (BCDT), suggesting shared underlying immunopathologies. This review aims to provide a comprehensive exploration of B cells, antibody subclasses, and their general properties before examining the distinctive characteristics of IgG4 subclass antibodies in the context of health, IgG4-AID and IgG4-RD. Furthermore, we will examine potential therapeutic strategies for these conditions, with a special focus on leveraging insights gained from anti-CD20-mediated BCDT. Through this analysis, we aim to enhance our understanding of the pathogenesis of IgG4-mediated diseases and identify promising possibilities for targeted therapeutic intervention.
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Affiliation(s)
- Selen Ünlü
- Koç University Research Center for Translational Medicine (KUTTAM), İstanbul, Türkiye
- Koç University School of Medicine, Istanbul, Türkiye
| | - Blanca G. Sánchez Navarro
- Department of Neurology with Experimental Neurology, Integrated Myasthenia Gravis Center, Neuroscience Clinical Research Center, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Elif Cakan
- Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard University, Cambridge, MA, United States
| | - Daniel Berchtold
- Department of Neurology with Experimental Neurology, Integrated Myasthenia Gravis Center, Neuroscience Clinical Research Center, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Rafael Meleka Hanna
- Department of Neurology with Experimental Neurology, Integrated Myasthenia Gravis Center, Neuroscience Clinical Research Center, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Secil Vural
- Koç University Research Center for Translational Medicine (KUTTAM), İstanbul, Türkiye
- Department of Dermatology and Venereology, Koç University School of Medicine, İstanbul, Türkiye
| | - Atay Vural
- Koç University Research Center for Translational Medicine (KUTTAM), İstanbul, Türkiye
- Department of Neurology, Koç University School of Medicine, İstanbul, Türkiye
| | - Andreas Meisel
- Department of Neurology with Experimental Neurology, Integrated Myasthenia Gravis Center, Neuroscience Clinical Research Center, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Miriam L. Fichtner
- Koç University Research Center for Translational Medicine (KUTTAM), İstanbul, Türkiye
- Department of Neurology with Experimental Neurology, Integrated Myasthenia Gravis Center, Neuroscience Clinical Research Center, Charité Universitätsmedizin Berlin, Berlin, Germany
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8
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Ravi G, Bal S, Joiner L, Giri S, Sentell M, Hill T, Godby KN, Costa LJ. Subsequent therapy and outcomes in patients with newly diagnosed multiple myeloma experiencing disease progression after quadruplet combinations. Br J Haematol 2024; 204:1300-1306. [PMID: 38291707 DOI: 10.1111/bjh.19303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/24/2023] [Accepted: 01/07/2024] [Indexed: 02/01/2024]
Abstract
The combination of anti-CD38 monoclonal antibodies to a proteasome inhibitor, an immunomodulatory agent and dexamethasone (quadruplet-QUAD) in sequence with autologous stem cell transplantation (ASCT) leads to deep and durable responses in newly diagnosed multiple myeloma (NDMM). Disease progression in the first year post-QUADs is uncommon. We analysed 274 consecutive NDMM patients treated with QUADs + ASCT. After a median follow-up of 21.3 months, 20 patients had disease progression <18 months and 21 had progression ≥18 months after the onset of a QUAD regimen. All patients received subsequent anti-MM therapy, and 38 were evaluated for response. Nine (22.0%) received T-cell redirecting therapy as the next treatment, and 21 (51.2%) at some point in the treatment course. Response to next therapy was 26.3% for patients with progression <18 months and 52.6% for those with progression ≥18 months after the onset of a QUAD regimen. Median PFS on the next therapy was 2.5 months (95% CI 1.5-3.4) for those with progression <18 months and 7.0 months (95% CI 3.6-10.5) for those with progression ≥18 months. Efforts should focus on the early deployment of therapies with new mechanism of action for patients experiencing treatment failure after QUADs.
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Affiliation(s)
- Gayathri Ravi
- Division of Hematology and Oncology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Susan Bal
- Division of Hematology and Oncology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Laura Joiner
- Department of Pharmacy, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Smit Giri
- Division of Hematology and Oncology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Melissa Sentell
- Division of Hematology and Oncology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Tiffany Hill
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Kelly N Godby
- Division of Hematology and Oncology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Luciano J Costa
- Division of Hematology and Oncology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
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9
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Terpos E, Ntanasis-Stathopoulos I, Gavriatopoulou M, Katodritou E, Hatjiharissi E, Malandrakis P, Verrou E, Golfinopoulos S, Migkou M, Manousou K, Delimpasi S, Symeonidis A, Kastritis E, Dimopoulos MA. Efficacy and safety of daratumumab with ixazomib and dexamethasone in lenalidomide-exposed patients after one prior line of therapy: Final results of the phase 2 study DARIA. Am J Hematol 2024; 99:396-407. [PMID: 38298023 DOI: 10.1002/ajh.27206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 12/16/2023] [Accepted: 12/19/2023] [Indexed: 02/02/2024]
Abstract
The use of lenalidomide in frontline therapy for patients with newly diagnosed multiple myeloma (MM) has increased the number of those who become refractory to lenalidomide at second line. In this context, we assessed the efficacy of daratumumab in combination with ixazomib and dexamethasone (Dara-Ixa-dex) in the prospective phase 2 study DARIA. Eligible patients had relapsed/refractory MM (RRMM) after one prior line with a lenalidomide-based regimen. The primary endpoint was overall response rate (ORR). Secondary endpoints included survival outcomes, safety and changes in biomarkers of bone metabolism. Overall, 50 patients were enrolled (median age 69 years, 56% males). 32 (64%) patients were refractory to lenalidomide, and 17 (34%) had undergone autologous transplant. The ORR was 64% (n = 32); whereas 17 (34%) had a very good partial response or better. The median time to first response was 1.0 month. After a median follow-up of 23.4 months, the median PFS and OS were 8.1 and 39.2 months, respectively. Furthermore, significant changes in markers of bone metabolism became evident as early as at 6 months on treatment. Regarding safety, 21 (42%) patients had ≥1 grade 3/4 adverse event (AE); the most common was thrombocytopenia (n = 9, 18%). 14 (28%) patients had ≥1 serious AE (SAE), the most common being acute kidney injury and pneumonia (n = 2, each). Four patients died due to infections. In conclusion, second-line treatment with Dara-Ixa-dex in patients with RRMM pre-treated with a lenalidomide-based regimen resulted in rapid responses along with a favorable effect on bone metabolism.
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Affiliation(s)
- Evangelos Terpos
- Department of Clinical Therapeutics, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
| | - Ioannis Ntanasis-Stathopoulos
- Department of Clinical Therapeutics, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
| | - Maria Gavriatopoulou
- Department of Clinical Therapeutics, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
| | - Eirini Katodritou
- Department of Hematology, Theagenio Cancer Hospital, Thessaloniki, Greece
| | - Evdoxia Hatjiharissi
- First Department of Internal Medicine, Division of Haematology, AHEPA University Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Panagiotis Malandrakis
- Department of Clinical Therapeutics, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
| | - Evgenia Verrou
- Department of Hematology, Theagenio Cancer Hospital, Thessaloniki, Greece
| | | | - Magdalini Migkou
- Department of Clinical Therapeutics, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
| | | | - Sosana Delimpasi
- Department of Hematology and Bone Marrow Transplantation Unit, Evangelismos Hospital, Athens, Greece
| | - Argiris Symeonidis
- Hematology Division, Department of Internal Medicine, University of Patras Medical School, Patras, Greece
| | - Efstathios Kastritis
- Department of Clinical Therapeutics, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
| | - Meletios A Dimopoulos
- Department of Clinical Therapeutics, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
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10
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Kotemul K, Kasinrerk W, Takheaw N. CD99 tumor associated antigen is a potential target for antibody therapy of T-cell acute lymphoblastic leukemia. EXPLORATION OF TARGETED ANTI-TUMOR THERAPY 2024; 5:96-107. [PMID: 38468825 PMCID: PMC10925484 DOI: 10.37349/etat.2024.00207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 11/29/2023] [Indexed: 03/13/2024] Open
Abstract
Monoclonal antibodies (mAbs) are an effective drug for targeted immunotherapy in several cancer types. However, so far, no antibody has been successfully developed for certain types of cancer, including T-cell acute lymphoblastic leukemia (T-ALL). T-ALL is an aggressive hematologic malignancy. T-ALL patients who are treated with chemotherapeutic drugs frequently relapse and become drug resistant. Therefore, antibody-based therapy is promising for T-ALL treatment. To successfully develop an antibody-based therapy for T-ALL, antibodies that induce death in malignant T cells but not in nonmalignant T cells are required to avoid the induction of secondary T-cell immunodeficiency. In this review, CD99 tumor associated antigen, which is highly expressed on malignant T cells and lowly expressed on nonmalignant T cells, is proposed to be a potential target for antibody therapy of T-ALL. Since certain clones of anti-CD99 mAbs induce apoptosis only in malignant T cells, these anti-CD99 mAbs might be a promising antibody drug for the treatment of T-ALL with high efficiency and low adverse effects. Moreover, over the past 25 years, many clones of anti-CD99 mAbs have been studied for their direct effects on T-ALL. These outcomes are gathered here.
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Affiliation(s)
- Kamonporn Kotemul
- Division of Clinical Immunology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Watchara Kasinrerk
- Division of Clinical Immunology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
- Biomedical Technology Research Center, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency at the Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Nuchjira Takheaw
- Division of Clinical Immunology, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
- Biomedical Technology Research Center, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency at the Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
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11
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Chen X, Wong OK, Reiman L, Sherbenou DW, Post L. CD38 x ICAM-1 Bispecific Antibody Is a Novel Approach for Treating Multiple Myeloma and Lymphoma. Mol Cancer Ther 2024; 23:127-138. [PMID: 37816503 DOI: 10.1158/1535-7163.mct-23-0052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 05/18/2023] [Accepted: 10/05/2023] [Indexed: 10/12/2023]
Abstract
The cluster of differentiation 38 (CD38) is a well-validated target for treating multiple myeloma. Although anti-CD38 mAbs have demonstrated outstanding initial responses in patients with multiple myeloma, nearly all patients eventually develop resistance and relapse. In addition, currently approved CD38 targeting therapies have failed to show monotherapy efficacy in lymphomas, where CD38 expression is present but at lower levels. To effectively target CD38 on tumor cells, we generated an antibody-dependent cellular cytotoxicity (ADCC) enhanced bispecific CD38 x intercellular cell adhesion molecule 1 (ICAM-1) antibody, VP301. This bispecific antibody targets unique epitopes on CD38 and ICAM-1 on tumor cells with reduced red blood cell binding compared with the benchmark CD38 antibody daratumumab. VP301 demonstrated potent ADCC and antibody-dependent cellular phagocytosis activities on a selected set of myeloma and lymphoma cell lines even those with low CD38 expression. In an ex vivo drug sensitivity assay, we observed responses to VP301 in multiple myeloma primary samples from relapsed/refractory patients. Moreover, VP301 demonstrated potent tumor inhibition activities in in vivo myeloma and lymphoma models. Interestingly, combination of VP301 with the immunomodulatory drug, lenalidomide, led to synergistic antitumor growth activity in an in vivo efficacy study. In conclusion, the CD38 x ICAM-1 bispecific antibody VP301 demonstrated promising efficacy and specificity toward CD38+ and ICAM-1+ tumor cells and represents a novel approach for treating multiple myeloma and lymphoma.
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Affiliation(s)
| | - Oi Kwan Wong
- Virtuoso Therapeutics, Inc., San Mateo, California
| | - Lauren Reiman
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Daniel W Sherbenou
- Division of Hematology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado
- University of Colorado Cancer Center, University of Colorado Anschutz Medical Campus, Aurora, Colorado
| | - Leonard Post
- Virtuoso Therapeutics, Inc., San Mateo, California
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12
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Facon T, Moreau P, Baker R, Min CK, Leleu X, Mohty M, Karlin L, Armstrong NM, Tekle C, Schwab S, Risse ML, Martin T. Isatuximab plus carfilzomib and dexamethasone in patients with early versus late relapsed multiple myeloma: IKEMA subgroup analysis. Haematologica 2024; 109:604-616. [PMID: 37584290 PMCID: PMC10828790 DOI: 10.3324/haematol.2023.283073] [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: 03/22/2023] [Accepted: 08/08/2023] [Indexed: 08/17/2023] Open
Abstract
Patients with multiple myeloma (MM) who experience early relapse within 12 months of therapy initiation are considered functional high-risk and represent an unmet need, needing better therapies to improve outcomes. The final IKEMA (clinicaltrials gov. identifier: NCT03275285) progression-free survival (PFS) analysis confirmed the significant PFS improvement reported at interim analysis with isatuximab (Isa) plus carfilzomib and dexamethasone (Kd; Isa-Kd) versus Kd in patients with relapsed MM (updated median PFS: 35.7 vs. 19.2 months; hazard ratio [HR] =0.58, 95% confidence interval [CI]: 0.42- 0.79). This IKEMA subgroup analysis examined efficacy and safety of Isa-Kd versus Kd in patients who experienced early (n=61 [Isa-Kd], n=46 [Kd]) vs. late relapse (n=104 [Isa-Kd], n=72 [Kd]). As expected, more aggressive features in baseline characteristics were observed in early relapse patients. Consistent with IKEMA overall population results, median PFS (early relapse: 24.7 vs. 17.2 months, HR=0.662, 95% CI: 0.407-1.077; late relapse: 42.7 vs. 21.9 months, HR=0.542, 95% CI: 0.355- 0.826), minimal residual disease negativity (MRD-) (early relapse: 24.6% vs. 15.2%; late relapse: 37.5% vs. 16.7%), and MRD- complete response (≥CR) rates (early relapse: 18.0% vs. 10.9%; late relapse: 30.8% vs. 13.9%) were higher with Isa-Kd versus Kd, respectively, in both early and late relapse patients. Grade ≥3, serious treatment-emergent adverse events, and death rates were higher in the late relapse Isa-Kd arm. However, the numbers of deaths were low and treatment exposure was significantly longer in Isa-Kd versus Kd late relapse patients. These results support the addition of Isa to Kd as standardof- care therapy for relapsed and/or refractory MM regardless of relapse timing.
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Affiliation(s)
- Thierry Facon
- Department of Haematology, Lille University Hospital, Lille.
| | - Philippe Moreau
- Department of Hematology, University Hospital Hôtel-Dieu, Nantes
| | - Ross Baker
- Perth Blood Institute, Murdoch University, Perth
| | - Chang-Ki Min
- Department of Hematology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Xavier Leleu
- Service d'Hématologie et Thérapie Cellulaire, CHU and CIC Inserm 1402, Poitiers Cedex
| | - Mohamad Mohty
- Department of Hematology, Hôpital Saint-Antoine, Sorbonne University, INSERM UMRs 938, Paris
| | - Lionel Karlin
- Department of Hematology, Hôpital Lyon Sud, Hospices Civils de Lyon, Pierre-Bénite
| | | | | | | | | | - Thomas Martin
- Department of Hematology, University of California at San Francisco, San Francisco, CA
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13
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Li X, Wang Y, Yang Q, Song L, Kang L, Hu Z, Wang Z. Microarray-Based CD38 Peptide Probe Screening for Multiple Myeloma Imaging. Mol Pharm 2024; 21:245-254. [PMID: 38096423 DOI: 10.1021/acs.molpharmaceut.3c00808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2024]
Abstract
Assessing CD38 expression in vivo has become a significant element in multiple myeloma (MM) therapy, as it can be used to detect lesions and forecast the effectiveness of treatment. Accurate diagnosis requires a multifunctional, high-throughput probe screening platform to develop molecular probes for tumor-targeted multimodal imaging and treatment. Here, we investigated a microarray chip-based strategy for high-throughput screening of peptide probes for CD38. We obtained two new target peptides, CA-1 and CA-2, from a 105 peptide library with a dissociation constant (KD) of 10-7 M. The specificity and affinity of the target peptides were confirmed at the molecular and cellular levels. Peptide probes were labeled with indocyanine green (ICG) dye and 68Ga-DOTA, which were injected into a CD38-positive Ramos tumor-bearing mouse via its tail vein, and small animal fluorescence and positron emission tomography (PET) imaging showed that the peptide probes could show specific enrichment in the tumor tissue. Our study shows that a microchip-based screening of peptide probes can be used as a promising imaging tool for MM diagnosis.
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Affiliation(s)
- Xuejie Li
- Fujian Provincial Key Laboratory of Brain Aging and Neurodegenerative Diseases, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian 350122, China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Yuanzhuo Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Qi Yang
- Department of Nuclear Medicine, Peking University First Hospital, Beijing 100034, China
| | - Lele Song
- Department of Nuclear Medicine, Peking University First Hospital, Beijing 100034, China
| | - Lei Kang
- Department of Nuclear Medicine, Peking University First Hospital, Beijing 100034, China
| | - Zhiyuan Hu
- Fujian Provincial Key Laboratory of Brain Aging and Neurodegenerative Diseases, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian 350122, China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
- School of Nanoscience and Technology, Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China
- School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China
| | - Zihua Wang
- Fujian Provincial Key Laboratory of Brain Aging and Neurodegenerative Diseases, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian 350122, China
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14
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Gil‐Fernández JJ, García Ramírez P, Callejas Charavía M. Isatuximab-carfilzomib-dexamethasone immediately after failing of the quadruplet Daratumumab-bortezomib-lenalidomide-dexamethasone (Dara-VRD): Striking response with no washout in a newly diagnosed multiple myeloma. Clin Case Rep 2024; 12:e8449. [PMID: 38268620 PMCID: PMC10805998 DOI: 10.1002/ccr3.8449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 12/23/2023] [Accepted: 01/08/2024] [Indexed: 01/26/2024] Open
Abstract
Biochemical evolution of serum IgG-Kappa monoclonal component during the first line with VRD (x1), DARA-VRD (x4), and the second line with ISA-KD (x4).
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15
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Hartley-Brown M. Considerations for next therapy after anti-CD38 monoclonal antibodies used as first line. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2023; 2023:443-449. [PMID: 38066885 PMCID: PMC10727041 DOI: 10.1182/hematology.2023000444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
In the current treatment paradigm, the use of anti-CD38 monoclonal antibodies (mAbs) in frontline has notably increased, for both transplant-ineligible and transplant-eligible patients with newly diagnosed multiple myeloma (NDMM) patients. As a result, patients with multiple myeloma (MM) are frequently exposed to or develop resistance to anti-CD38 mAb therapy during the initial stages of treatment. Here, we review second-line (first relapse) and some third-line (second relapse) therapies for patients with MM with disease progression after exposure to anti-CD38 mAb-based therapy. We discuss therapies including B-cell maturation antigen (BCMA)-targeted and non-BCMA-targeted therapeutic options in the setting of prior anti-CD38 mAb exposure/refractoriness.
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16
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Mishra AK, Gupta A, Dagar G, Das D, Chakraborty A, Haque S, Prasad CP, Singh A, Bhat AA, Macha MA, Benali M, Saini KS, Previs RA, Saini D, Saha D, Dutta P, Bhatnagar AR, Darswal M, Shankar A, Singh M. CAR-T-Cell Therapy in Multiple Myeloma: B-Cell Maturation Antigen (BCMA) and Beyond. Vaccines (Basel) 2023; 11:1721. [PMID: 38006053 PMCID: PMC10674477 DOI: 10.3390/vaccines11111721] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/19/2023] [Accepted: 11/12/2023] [Indexed: 11/26/2023] Open
Abstract
Significant progress has been achieved in the realm of therapeutic interventions for multiple myeloma (MM), leading to transformative shifts in its clinical management. While conventional modalities such as surgery, radiotherapy, and chemotherapy have improved the clinical outcomes, the overarching challenge of effecting a comprehensive cure for patients afflicted with relapsed and refractory MM (RRMM) endures. Notably, adoptive cellular therapy, especially chimeric antigen receptor T-cell (CAR-T) therapy, has exhibited efficacy in patients with refractory or resistant B-cell malignancies and is now also being tested in patients with MM. Within this context, the B-cell maturation antigen (BCMA) has emerged as a promising candidate for CAR-T-cell antigen targeting in MM. Alternative targets include SLAMF7, CD38, CD19, the signaling lymphocyte activation molecule CS1, NKG2D, and CD138. Numerous clinical studies have demonstrated the clinical efficacy of these CAR-T-cell therapies, although longitudinal follow-up reveals some degree of antigenic escape. The widespread implementation of CAR-T-cell therapy is encumbered by several barriers, including antigenic evasion, uneven intratumoral infiltration in solid cancers, cytokine release syndrome, neurotoxicity, logistical implementation, and financial burden. This article provides an overview of CAR-T-cell therapy in MM and the utilization of BCMA as the target antigen, as well as an overview of other potential target moieties.
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Affiliation(s)
- Abhinava K. Mishra
- Molecular, Cellular and Developmental Biology Department, University of California Santa Barbara, Santa Barbara, CA 93106, USA;
| | - Ashna Gupta
- Department of Medical Oncology (Lab), Dr. BRAIRCH, All India Institute of Medical Sciences (AIIMS), New Delhi 110029, India; (A.G.); (G.D.); (C.P.P.)
| | - Gunjan Dagar
- Department of Medical Oncology (Lab), Dr. BRAIRCH, All India Institute of Medical Sciences (AIIMS), New Delhi 110029, India; (A.G.); (G.D.); (C.P.P.)
| | - Dayasagar Das
- Department of Medicine, NYU Langone Health, New York, NY 10016, USA;
| | - Abhijit Chakraborty
- Department of Investigational Cancer Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA;
| | - Shabirul Haque
- Feinstein Institute of Medical Research, Northwell Health, Manhasset, NY 11030, USA;
| | - Chandra Prakash Prasad
- Department of Medical Oncology (Lab), Dr. BRAIRCH, All India Institute of Medical Sciences (AIIMS), New Delhi 110029, India; (A.G.); (G.D.); (C.P.P.)
| | - Archana Singh
- Department of Biochemistry, All India Institute of Medical Sciences (AIIMS), New Delhi 110029, India;
| | - Ajaz A. Bhat
- Precision Medicine in Diabetes, Obesity and Cancer Program, Department of Human Genetics, Sidra Medicine, Doha P.O. Box 26999, Qatar;
| | - Muzafar A. Macha
- Watson-Crick Centre for Molecular Medicine, Islamic University of Science and Technology, Awantipora 192122, India;
| | - Moez Benali
- Fortrea Inc., Durham, NC 27709, USA; (M.B.); (K.S.S.)
| | - Kamal S. Saini
- Fortrea Inc., Durham, NC 27709, USA; (M.B.); (K.S.S.)
- Addenbrooke’s Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge CB2 0QQ, UK
| | - Rebecca Ann Previs
- Labcorp Oncology, Durham, NC 27560, USA;
- Department of Obstetrics and Gynecology, Division of Gynecologic Oncology, Duke University Medical Center, Durham, NC 27710, USA
| | - Deepak Saini
- Department of Materia Medica, State Lal Bahadur Shastri Homoeopathic Medical College, Prayagraj 211013, India;
| | - Dwaipayan Saha
- Pratap Chandra Memorial Homoeopathic Hospital & College, Kolkata 700011, India; (D.S.); (P.D.)
| | - Preyangsee Dutta
- Pratap Chandra Memorial Homoeopathic Hospital & College, Kolkata 700011, India; (D.S.); (P.D.)
| | - Aseem Rai Bhatnagar
- Department of Radiation Oncology, Henry Ford Cancer Institute, Detroit, MI 48202, USA;
| | - Mrinalini Darswal
- Harvard T.H. Chan School of Public Health, Huntington Ave, Boston, MA 02115, USA;
| | - Abhishek Shankar
- Department of Radiation Oncology, Dr. BRAIRCH, All India Institute of Medical Sciences (AIIMS), New Delhi 110029, India
| | - Mayank Singh
- Department of Medical Oncology (Lab), Dr. BRAIRCH, All India Institute of Medical Sciences (AIIMS), New Delhi 110029, India; (A.G.); (G.D.); (C.P.P.)
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17
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Abramson HN. Immunotherapy of Multiple Myeloma: Current Status as Prologue to the Future. Int J Mol Sci 2023; 24:15674. [PMID: 37958658 PMCID: PMC10649824 DOI: 10.3390/ijms242115674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/22/2023] [Accepted: 10/25/2023] [Indexed: 11/15/2023] Open
Abstract
The landscape of therapeutic measures to treat multiple myeloma has undergone a seismic shift since the dawn of the current century. This has been driven largely by the introduction of new classes of small molecules, such as proteasome blockers (e.g., bortezomib) and immunomodulators (e.g., lenalidomide), as well as by immunotherapeutic agents starting with the anti-CD38 monoclonal antibody daratumumab in 2015. Recently, other immunotherapies have been added to the armamentarium of drugs available to fight this malignancy. These include the bispecifics teclistamab, talquetamab, and elranatamab, and the chimeric antigen receptor (CAR) T-cell products idecabtagene vicleucel (ide-cel) and ciltacabtagene autoleucel (cilta-cel). While the accumulated benefits of these newer agents have resulted in a more than doubling of the disease's five-year survival rate to nearly 60% and improved quality of life, the disease remains incurable, as patients become refractory to the drugs and experience relapse. This review covers the current scope of antimyeloma immunotherapeutic agents, both those in clinical use and in development. Included in the discussion are additional monoclonal antibodies (mAbs), antibody-drug conjugates (ADCs), bi- and multitargeted mAbs, and CAR T-cells and emerging natural killer (NK) cells, including products intended for "off-the-shelf" (allogeneic) applications. Emphasis is placed on the benefits of each along with the challenges that need to be surmounted if MM is to be cured.
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Affiliation(s)
- Hanley N Abramson
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, MI 48202, USA
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18
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Bisht K, Fukao T, Chiron M, Richardson P, Atanackovic D, Chini E, Chng WJ, Van De Velde H, Malavasi F. Immunomodulatory properties of CD38 antibodies and their effect on anticancer efficacy in multiple myeloma. Cancer Med 2023; 12:20332-20352. [PMID: 37840445 PMCID: PMC10652336 DOI: 10.1002/cam4.6619] [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: 08/04/2023] [Revised: 09/20/2023] [Accepted: 09/22/2023] [Indexed: 10/17/2023] Open
Abstract
BACKGROUND CD38 has been established as an important therapeutic target for multiple myeloma (MM), for which two CD38 antibodies are currently approved-daratumumab and isatuximab. CD38 is an ectoenzyme that degrades NAD and its precursors and is involved in the production of adenosine and other metabolites. AIM Among the various mechanisms by which CD38 antibodies can induce MM cell death is immunomodulation, including multiple pathways for CD38-mediated T-cell activation. Patients who respond to anti-CD38 targeting treatment experience more marked changes in T-cell expansion, activity, and clonality than nonresponders. IMPLICATIONS Resistance mechanisms that undermine the immunomodulatory effects of CD38-targeting therapies can be tumor intrinsic, such as the downregulation of CD38 surface expression and expression of complement inhibitor proteins, and immune microenvironment-related, such as changes to the natural killer (NK) cell numbers and function in the bone marrow niche. There are numerous strategies to overcome this resistance, which include identifying and targeting other therapeutic targets involved in, for example, adenosine production, the activation of NK cells or monocytes through immunomodulatory drugs and their combination with elotuzumab, or with bispecific T-cell engagers.
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Affiliation(s)
| | - Taro Fukao
- Sanofi OncologyCambridgeMassachusettsUSA
| | | | - Paul Richardson
- Department of Medical Oncology, Jerome Lipper Multiple Myeloma CenterDana Farber Cancer Institute, Harvard Medical SchoolBostonMassachusettsUSA
| | - Djordje Atanackovic
- University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer CenterBaltimoreMarylandUSA
- Department of MedicineUniversity of Maryland School of MedicineBaltimoreMarylandUSA
| | - Eduardo Chini
- Department of Anesthesiology and Perioperative MedicineMayo ClinicJacksonvilleFloridaUSA
| | - Wee Joo Chng
- Cancer Science Institute of SingaporeNational University of SingaporeSingaporeSingapore
| | | | - Fabio Malavasi
- Department of Medical SciencesUniversity of TurinTorinoItaly
- Fondazione Ricerca MolinetteTorinoItaly
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19
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Osada N, Kikuchi J, Iha H, Yasui H, Ikeda S, Takahashi N, Furukawa Y. c-FOS is an integral component of the IKZF1 transactivator complex and mediates lenalidomide resistance in multiple myeloma. Clin Transl Med 2023; 13:e1364. [PMID: 37581569 PMCID: PMC10426395 DOI: 10.1002/ctm2.1364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 07/28/2023] [Accepted: 08/06/2023] [Indexed: 08/16/2023] Open
Abstract
BACKGROUND The immunomodulatory drug lenalidomide, which is now widely used for the treatment of multiple myeloma (MM), exerts pharmacological action through the ubiquitin-dependent degradation of IKZF1 and subsequent down-regulation of interferon regulatory factor 4 (IRF4), a critical factor for the survival of MM cells. IKZF1 acts principally as a tumour suppressor via transcriptional repression of oncogenes in normal lymphoid lineages. In contrast, IKZF1 activates IRF4 and other oncogenes in MM cells, suggesting the involvement of unknown co-factors in switching the IKZF1 complex from a transcriptional repressor to an activator. The transactivating components of the IKZF1 complex might promote lenalidomide resistance by residing on regulatory regions of the IRF4 gene to maintain its transcription after IKZF1 degradation. METHODS To identify unknown components of the IKZF1 complex, we analyzed the genome-wide binding of IKZF1 in MM cells using chromatin immunoprecipitation-sequencing (ChIP-seq) and screened for the co-occupancy of IKZF1 with other DNA-binding factors on the myeloma genome using the ChIP-Atlas platform. RESULTS We found that c-FOS, a member of the activator protein-1 (AP-1) family, is an integral component of the IKZF1 complex and is primarily responsible for the activator function of the complex in MM cells. The genome-wide screening revealed the co-occupancy of c-FOS with IKZF1 on the regulatory regions of IKZF1-target genes, including IRF4 and SLAMF7, in MM cells but not normal bone marrow progenitors, pre-B cells or mature T-lymphocytes. c-FOS and IKZF1 bound to the same consensus sequence as the IKZF1 complex through direct protein-protein interactions. The complex also includes c-JUN and IKZF3 but not IRF4. Treatment of MM cells with short-hairpin RNA against FOS or a selective AP-1 inhibitor significantly enhanced the anti-MM activity of lenalidomide in vitro and in two murine MM models. Furthermore, an AP-1 inhibitor mitigated the lenalidomide resistance of MM cells. CONCLUSIONS C-FOS determines lenalidomide sensitivity and mediates drug resistance in MM cells as a co-factor of IKZF1 and thus, could be a novel therapeutic target for further improvement of the prognosis of MM patients.
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Affiliation(s)
- Naoki Osada
- Division of Stem Cell RegulationCenter for Molecular MedicineJichi Medical UniversityTochigiJapan
| | - Jiro Kikuchi
- Division of Stem Cell RegulationCenter for Molecular MedicineJichi Medical UniversityTochigiJapan
| | - Hidekatsu Iha
- Division of PathophysiologyThe Research Center for GLOBAL and LOCAL Infectious Diseases (RCGLID)Oita UniversityOitaJapan
| | - Hiroshi Yasui
- Division of Hematology and Oncology, Department of Internal MedicineSt. Marianna University School of MedicineKanagawaJapan
- Project Division of Innovative Diagnostics Technology Platform, The Institute of Medical ScienceThe University of TokyoTokyoJapan
| | - Sho Ikeda
- Department of HematologyNephrology and RheumatologyAkita University Graduate School of MedicineAkitaJapan
| | - Naoto Takahashi
- Department of HematologyNephrology and RheumatologyAkita University Graduate School of MedicineAkitaJapan
| | - Yusuke Furukawa
- Division of Stem Cell RegulationCenter for Molecular MedicineJichi Medical UniversityTochigiJapan
- Center for Medical EducationTeikyo University of ScienceTokyoJapan
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20
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García-Sánchez D, González-González A, Alfonso-Fernández A, Del Dujo-Gutiérrez M, Pérez-Campo FM. Communication between bone marrow mesenchymal stem cells and multiple myeloma cells: Impact on disease progression. World J Stem Cells 2023; 15:421-437. [PMID: 37342223 PMCID: PMC10277973 DOI: 10.4252/wjsc.v15.i5.421] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 02/27/2023] [Accepted: 04/17/2023] [Indexed: 05/26/2023] Open
Abstract
Multiple myeloma (MM) is a hematological malignancy characterized by the accumulation of immunoglobulin-secreting clonal plasma cells at the bone marrow (BM). The interaction between MM cells and the BM microenvironment, and specifically BM mesenchymal stem cells (BM-MSCs), has a key role in the pathophysiology of this disease. Multiple data support the idea that BM-MSCs not only enhance the proliferation and survival of MM cells but are also involved in the resistance of MM cells to certain drugs, aiding the progression of this hematological tumor. The relation of MM cells with the resident BM-MSCs is a two-way interaction. MM modulate the behavior of BM-MSCs altering their expression profile, proliferation rate, osteogenic potential, and expression of senescence markers. In turn, modified BM-MSCs can produce a set of cytokines that would modulate the BM microenvironment to favor disease progression. The interaction between MM cells and BM-MSCs can be mediated by the secretion of a variety of soluble factors and extracellular vesicles carrying microRNAs, long non-coding RNAs or other molecules. However, the communication between these two types of cells could also involve a direct physical interaction through adhesion molecules or tunneling nanotubes. Thus, understanding the way this communication works and developing strategies to interfere in the process, would preclude the expansion of the MM cells and might offer alternative treatments for this incurable disease.
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Affiliation(s)
- Daniel García-Sánchez
- Department of Molecular Biology_IDIVAL, Faculty of Medicine, University of Cantabria, Santander 39011, Cantabria, Spain
| | - Alberto González-González
- Department of Molecular Biology_IDIVAL, Faculty of Medicine, University of Cantabria, Santander 39011, Cantabria, Spain
| | - Ana Alfonso-Fernández
- Servicio de Traumatología y Cirugía Ortopédica, Hospital Universitario Marqués de Valdecilla, Instituto de Investigación Sanitaria Valdecilla (IDIVAL), Facultad de Medicina, Universidad de Cantabria, Santander 39008, Cantabria, Spain
| | - Mónica Del Dujo-Gutiérrez
- Department of Molecular Biology_IDIVAL, Faculty of Medicine, University of Cantabria, Santander 39011, Cantabria, Spain
| | - Flor M Pérez-Campo
- Department of Molecular Biology_IDIVAL, Faculty of Medicine, University of Cantabria, Santander 39011, Cantabria, Spain
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21
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Verkleij CPM, Frerichs KA, Broekmans MEC, Duetz C, O'Neill CA, Bruins WSC, Homan-Weert PM, Minnema MC, Levin MD, Broijl A, Bos GMJ, Kersten MJ, Klein SK, Shikhagaie MM, Casneuf T, Abraham Y, Smets T, Vanhoof G, Cortes-Selva D, van Steenbergen L, Ramos E, Verona RI, Krevvata M, Sonneveld P, Zweegman S, Mutis T, van de Donk NWCJ. NK Cell Phenotype Is Associated With Response and Resistance to Daratumumab in Relapsed/Refractory Multiple Myeloma. Hemasphere 2023; 7:e881. [PMID: 37153876 PMCID: PMC10155898 DOI: 10.1097/hs9.0000000000000881] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 03/30/2023] [Indexed: 05/10/2023] Open
Abstract
The CD38-targeting antibody daratumumab has marked activity in multiple myeloma (MM). Natural killer (NK) cells play an important role during daratumumab therapy by mediating antibody-dependent cellular cytotoxicity via their FcγRIII receptor (CD16), but they are also rapidly decreased following initiation of daratumumab treatment. We characterized the NK cell phenotype at baseline and during daratumumab monotherapy by flow cytometry and cytometry by time of flight to assess its impact on response and development of resistance (DARA-ATRA study; NCT02751255). At baseline, nonresponding patients had a significantly lower proportion of CD16+ and granzyme B+ NK cells, and higher frequency of TIM-3+ and HLA-DR+ NK cells, consistent with a more activated/exhausted phenotype. These NK cell characteristics were also predictive of inferior progression-free survival and overall survival. Upon initiation of daratumumab treatment, NK cells were rapidly depleted. Persisting NK cells exhibited an activated and exhausted phenotype with reduced expression of CD16 and granzyme B, and increased expression of TIM-3 and HLA-DR. We observed that addition of healthy donor-derived purified NK cells to BM samples from patients with either primary or acquired daratumumab-resistance improved daratumumab-mediated MM cell killing. In conclusion, NK cell dysfunction plays a role in primary and acquired daratumumab resistance. This study supports the clinical evaluation of daratumumab combined with adoptive transfer of NK cells.
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Affiliation(s)
- Christie P M Verkleij
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Hematology, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology, Amsterdam, The Netherlands
| | - Kristine A Frerichs
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Hematology, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology, Amsterdam, The Netherlands
| | - Marloes E C Broekmans
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Hematology, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology, Amsterdam, The Netherlands
| | - Carolien Duetz
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Hematology, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology, Amsterdam, The Netherlands
| | - Chloe A O'Neill
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Hematology, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology, Amsterdam, The Netherlands
| | - Wassilis S C Bruins
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Hematology, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology, Amsterdam, The Netherlands
| | - Paola M Homan-Weert
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Hematology, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology, Amsterdam, The Netherlands
| | - Monique C Minnema
- University Medical Center Utrecht, Department of Hematology, Utrecht University, The Netherlands
| | - Mark-David Levin
- Department of Internal Medicine, Albert Schweitzer Hospital, Dordrecht, The Netherlands
| | - Annemiek Broijl
- Department of Hematology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Gerard M J Bos
- Department of Hematology, Maastricht University Medical Center, The Netherlands
| | - Marie José Kersten
- Cancer Center Amsterdam, Cancer Biology and Immunology, Amsterdam, The Netherlands
- Amsterdam UMC Location University of Amsterdam, Department of Hematology, Amsterdam, The Netherlands
| | - Saskia K Klein
- Department of Internal Medicine, Meander Medical Center, Amersfoort, The Netherlands
- Department of Hematology, University Medical Center Groningen, The Netherlands
| | - Medya M Shikhagaie
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Hematology, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology, Amsterdam, The Netherlands
| | | | - Yann Abraham
- Janssen Research and Development, Beerse, Belgium
| | - Tina Smets
- Janssen Research and Development, Beerse, Belgium
| | | | | | | | | | | | | | - Pieter Sonneveld
- Department of Hematology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Sonja Zweegman
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Hematology, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology, Amsterdam, The Netherlands
| | - Tuna Mutis
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Hematology, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology, Amsterdam, The Netherlands
| | - Niels W C J van de Donk
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Hematology, Amsterdam, The Netherlands
- Cancer Center Amsterdam, Cancer Biology and Immunology, Amsterdam, The Netherlands
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22
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Phase 1b Study of Isatuximab in Combination With Bortezomib, Cyclophosphamide, and Dexamethasone in Newly Diagnosed, Transplant-ineligible Multiple Myeloma Patients. Hemasphere 2023; 7:e829. [PMID: 36751513 PMCID: PMC9894356 DOI: 10.1097/hs9.0000000000000829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 12/12/2022] [Indexed: 02/04/2023] Open
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23
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Suzuki R, Ogiya D, Ogawa Y, Kawada H, Ando K. Targeting CAM-DR and Mitochondrial Transfer for the Treatment of Multiple Myeloma. Curr Oncol 2022; 29:8529-8539. [PMID: 36354732 PMCID: PMC9689110 DOI: 10.3390/curroncol29110672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/05/2022] [Accepted: 11/07/2022] [Indexed: 11/12/2022] Open
Abstract
The prognosis of patients with multiple myeloma (MM) has improved dramatically with the introduction of new therapeutic drugs, but the disease eventually becomes drug-resistant, following an intractable and incurable course. A myeloma niche (MM niche) develops in the bone marrow microenvironment and plays an important role in the drug resistance mechanism of MM. In particular, adhesion between MM cells and bone marrow stromal cells mediated by adhesion molecules induces cell adhesion-mediated drug resistance (CAM-DR). Analyses of the role of mitochondria in cancer cells, including MM cells, has revealed that the mechanism leading to drug resistance involves exchange of mitochondria between cells (mitochondrial transfer) via tunneling nanotubes (TNTs) within the MM niche. Here, we describe the discovery of these drug resistance mechanisms and the identification of promising therapeutic agents primarily targeting CAM-DR, mitochondrial transfer, and TNTs.
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Affiliation(s)
- Rikio Suzuki
- Correspondence: ; Tel.: +81-463-93-1121; Fax: +81-463-92-4511
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