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Venetoclax: A Review in Relapsed/Refractory Chronic Lymphocytic Leukemia

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Abstract

Venetoclax (Venclyxto®; Venclexta®) is a first-in-class, oral, selective B cell lymphoma-2 (BCL-2) inhibitor. The drug is approved in numerous countries, including those of the EU and in the USA, for the treatment of adults with relapsed or refractory (RR) chronic lymphocytic leukemia (CLL); the specific indication(s) for venetoclax may vary between individual countries. Venetoclax monotherapy or combination therapy with rituximab was an effective treatment, provided durable responses, and had a manageable safety profile in pivotal clinical trials in adults with RR CLL, including in patients with adverse prognostic factors. In combination with 6 cycles of rituximab, venetoclax (fixed 24 months’ treatment) was more effective than bendamustine plus rituximab (6 cycles) in prolonging progression-free survival (PFS) and inducing undetectable minimal residual disease (uMRD) in peripheral blood (PB) and bone marrow (BM), with these benefits sustained during 36 months’ follow-up. Hence, with its novel mechanism of action and convenient oral once-daily regimen, venetoclax monotherapy or fixed 24-month combination therapy with rituximab represents an important option for treating RR CLL, including in patients with del(17p) or TP53 mutation and those failing a B cell receptor (BCR) inhibitor and/or chemotherapy.

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Acknowledgements

During the peer review process, the manufacturer of venetoclax was also offered an opportunity to review this article. Changes resulting from comments received were made on the basis of scientific and editorial merit.

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Correspondence to Lesley J. Scott.

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The preparation of this review was not supported by any external funding.

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Lesley Scott is a salaried employee of Adis International Ltd./Springer Nature, is responsible for the article content and declares no relevant conflicts of interest.

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The manuscript was reviewed by:M. J. Braunstein, NYU Long Island School of Medicine, NYU Winthrop Hospital, Department of Medicine, Division of Haematology/Oncology, Mineola, NY, USA; T. Eyre, Oxford University Hospitals NHS Foundation Trust, Department of Haematology, Churchill Hospital, Oxford, UK; Y. Ge, Wayne State University School of Medicine, Department of Oncology, Detroit, MI, USA; J. F. Seymour, Peter MacCallum Cancer Center and Royal Melbourne Hospital, Department of Haematology, Melbourne, Victoria, Australia.

Enhanced material for this Adis Drug Evaluation can be found at https://adisjournals.figshare.com/s/dd9a375ae5aa5a191349.

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Scott, L.J. Venetoclax: A Review in Relapsed/Refractory Chronic Lymphocytic Leukemia. Targ Oncol 14, 493–504 (2019). https://doi.org/10.1007/s11523-019-00673-1

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