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      The role of carfilzomib in relapsed/refractory multiple myeloma

      review-article
      Therapeutic Advances in Hematology
      SAGE Publications
      carfilzomib, multiple myeloma

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          Abstract

          Carfilzomib is the second proteasome inhibitor approved for relapsed multiple myeloma. Since its approval in 2012, carfilzomib has been an active and versatile drug, based on its efficacy as a single agent; superiority as a doublet with dexamethasone compared with bortezomib and dexamethasone; and as a partner in diverse three drug combinations such as with lenalidomide or daratumumab. While it has an established place in relapsed disease, clinicians should be aware of its cardiovascular and renal adverse event profile, which is manageable, in order to optimize outcomes. This review will provide a perspective on the current and future role of carfilzomib in relapsed/refractory multiple myeloma.

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          Most cited references70

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          Carfilzomib, lenalidomide, and dexamethasone for relapsed multiple myeloma.

          Lenalidomide plus dexamethasone is a reference treatment for relapsed multiple myeloma. The combination of the proteasome inhibitor carfilzomib with lenalidomide and dexamethasone has shown efficacy in a phase 1 and 2 study in relapsed multiple myeloma.
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            Outcomes of patients with multiple myeloma refractory to CD38-targeted monoclonal antibody therapy

            The introduction of CD38-targeting monoclonal antibodies (CD38 MoABs), daratumumab and isatuximab, has significantly impacted the management of patients with multiple myeloma (MM). Outcomes of patients with MM refractory to CD38 MoABs have not been described. We analyzed outcomes of 275 MM patients at 14 academic centers with disease refractory to CD38 MoABs. Median interval between MM diagnosis and refractoriness to CD38 MoAB (T 0 ) was 50.1 months. The median overall survival (OS) from T 0 for the entire cohort was 8.6 [95% C.I. 7.5–9.9] months, ranging from 11.2 months for patients not simultaneously refractory to an immunomodulatory (IMiD) agent and a proteasome inhibitor (PI) to 5.6 months for “penta-refractory” patients (refractory to CD38 MoAB, 2 PIs and 2 IMiDs). At least one subsequent treatment regimen was employed after T 0 in 249 (90%) patients. Overall response rate to first regimen after T 0 was 31% with median progression-free survival (PFS) and OS of 3.4 and 9.3 months, respectively. PFS was best achieved with combinations of carfilzomib and alkylator (median 5.7 months), and daratumumab and IMiD (median 4.5 months). Patients with MM refractory to CD38 MoAB have poor prognosis and this study provides benchmark for new therapies to be tested in this population.
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              Potent activity of carfilzomib, a novel, irreversible inhibitor of the ubiquitin-proteasome pathway, against preclinical models of multiple myeloma.

              The proteasome has emerged as an important target for cancer therapy with the approval of bortezomib, a first-in-class, reversible proteasome inhibitor, for relapsed/refractory multiple myeloma (MM). However, many patients have disease that does not respond to bortezomib, whereas others develop resistance, suggesting the need for other inhibitors with enhanced activity. We therefore evaluated a novel, irreversible, epoxomicin-related proteasome inhibitor, carfilzomib. In models of MM, this agent potently bound and specifically inhibited the chymotrypsin-like proteasome and immunoproteasome activities, resulting in accumulation of ubiquitinated substrates. Carfilzomib induced a dose- and time-dependent inhibition of proliferation, ultimately leading to apoptosis. Programmed cell death was associated with activation of c-Jun-N-terminal kinase, mitochondrial membrane depolarization, release of cytochrome c, and activation of both intrinsic and extrinsic caspase pathways. This agent also inhibited proliferation and activated apoptosis in patient-derived MM cells and neoplastic cells from patients with other hematologic malignancies. Importantly, carfilzomib showed increased efficacy compared with bortezomib and was active against bortezomib-resistant MM cell lines and samples from patients with clinical bortezomib resistance. Carfilzomib also overcame resistance to other conventional agents and acted synergistically with dexamethasone to enhance cell death. Taken together, these data provide a rationale for the clinical evaluation of carfilzomib in MM.
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                Author and article information

                Contributors
                Journal
                Ther Adv Hematol
                Ther Adv Hematol
                TAH
                sptah
                Therapeutic Advances in Hematology
                SAGE Publications (Sage UK: London, England )
                2040-6207
                2040-6215
                8 June 2021
                2021
                : 12
                : 20406207211019612
                Affiliations
                [1-20406207211019612]Center for Multiple Myeloma, Massachusetts General Hospital Cancer Center, Harvard Medical School, 55 Fruit St, Boston, MA 02114, USA
                Author notes
                Author information
                https://orcid.org/0000-0003-3623-7491
                Article
                10.1177_20406207211019612
                10.1177/20406207211019612
                8191071
                34163580
                9626a1c4-4248-4591-929a-1e0cf4e2f7cf
                © The Author(s), 2021

                This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License ( https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages ( https://us.sagepub.com/en-us/nam/open-access-at-sage).

                History
                : 1 February 2021
                : 4 May 2021
                Categories
                Review
                Custom metadata
                January-December 2021
                ts1

                Hematology
                carfilzomib,multiple myeloma
                Hematology
                carfilzomib, multiple myeloma

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