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Decitabine/Cedazuridine: First Approval.

ABSTRACT: A fixed dose oral combination (FDC) of decitabine and cedazuridine (Inqovi^®), is being developed by Astex Pharmaceuticals (a subsidiary of Otsuka Pharmaceuticals) for the treatment of various cancers like myelodysplastic syndromes (MDS), chronic myelomonocytic leukaemia (CMML), acute myeloid leukaemia (AML), glioma and solid tumours. Decitabine, a DNA methyltransferase inhibitor approved for the treatment of MDS and CMML, is degraded by cytidine deaminase in the gastrointestinal tract and liver, thereby limiting oral bioavailability. Cedazuridine is a proprietary, patented cytidine deaminase inhibitor that, when added to decitabine, increases oral bioavailability of the drug. In July 2020, decitabine/cedazuridine received its first approval in the USA and Canada for the treatment of MDS and CMML. In the USA, it is indicated for use in adults with MDS and CMML, including previously treated and untreated, de novo and secondary MDS with the following French-American-British subtypes (refractory anaemia, refractory anaemia with ringed sideroblasts, refractory anaemia with excess blasts and CMML) and intermediate-1, intermediate-2 and high-risk International Prognostic Scoring System groups. Clinical studies for AML, glioma and solid tumours are underway in several countries worldwide. This article summarizes the milestones in the development of decitabine/cedazuridine leading to this first approval for the treatment of MDS and CMML.

SUBMITTER: Dhillon S

PROVIDER: S-EPMC7708383 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature

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Decitabine/Cedazuridine: First Approval.

Dhillon Sohita S

Drugs 20200901 13

A fixed dose oral combination (FDC) of decitabine and cedazuridine (Inqovi<sup>®</sup>), is being developed by Astex Pharmaceuticals (a subsidiary of Otsuka Pharmaceuticals) for the treatment of various cancers like myelodysplastic syndromes (MDS), chronic myelomonocytic leukaemia (CMML), acute myeloid leukaemia (AML), glioma and solid tumours. Decitabine, a DNA methyltransferase inhibitor approved for the treatment of MDS and CMML, is degraded by cytidine deaminase in the gastrointestinal tract ...[more]

PMID: 32860582

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Project description:BackgroundHypomethylating agents (HMAs) have shown efficacy in the treatment of hematological malignancies and are indicated for the treatment of chronic myelomonocytic leukemia (CMML). While the HMA decitabine, in its intravenous formulation, has been used since 2006 for the treatment of CMML, use of its oral formulation has been limited by poor bioavailability due to first-pass metabolism by the enzyme cytidine deaminase. The dose of intravenous decitabine is limited by toxicities such as cardiomyopathy and heart failure. Therefore, cedazuridine was developed as an inhibitor of cytidine deaminase. Cedazuridine decreases the first-pass metabolism of oral decitabine allowing therapeutic levels to be achieved at lower doses, and thus, the novel oral combination of cedazuridine with decitabine was developed. While cardiomyopathy and heart failure are well-established adverse effects associated with intravenous decitabine alone, there to our knowledge there have been no documented incidences of reversible cardiomyopathy in the literature or in patients who participated in the phase 2 and phase 3 clinical trials of oral decitabine-cedazuridine.CaseThis case study presents an 85 year-old Caucasian female with CMML who developed cardiomyopathy and heart failure with reduced ejection fraction after completing 5 cycles of therapy with decitabine/cedazuridine. Furthermore, her symptoms and cardiac function recovered upon discontinuation of the drug.ConclusionsWe present an occurrence of reversible cardiomyopathy in a patient who completed 5 cycles of decitabine/cedazuridine, an oral combination therapy developed to enhance oral bioavailability of decitabine thereby limiting its adverse effects. As the decitabine/cedazuridine combination therapy rises in popularity due to its convenient oral formulation, more trials are needed to understand the prevalence of cardiomyopathy with this drug and to discover preventative strategies for cardiotoxic effects.

Dataset Information

Decitabine/Cedazuridine: First Approval.

Publications

Decitabine/Cedazuridine: First Approval.

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