CellCentric's new ways to treat specific blood cancers published in Cancer Cell journal

22 Nov 2023
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Fast TrackOrphan DrugASH
CellCentric, a UK-based biotechnology company, announced today (November 22) the publication of the paper and how the work builds on pre-clinical and clinical collaborations, notably with Professor Tim Somervaille of the Cancer ResearchCancer Research UK Manchester Institute.
The paper, titled, Therapeutic targeting of EP300/CBP by bromodomain inhibition in hematologic malignancies​​, reports on the therapeutic mechanism of inobrodib and relevant clinical results.
The paper demonstrates inobrodib’s action as a potent and selective inhibitor of the bromodomains of p300 and CBP and shows how it has a profound impact on the regulatory elements which control expression of key cancer driver genes.
Inobrodib induces a significant redistribution of p300/CBP away from sites occupied by oncogenic master transcription factors. This novel approach is distinct from other oral agents such as the IMiD and CELMoD class of drugs.  The data show that this mechanism of action is synergistic with a number of existing developmental agents.
Well-tolerated new type of treatment
Somervaille said: “We are pleased to share how targeting the bromodomain of p300/CBP can deliver a new way to treat specific blood cancers. The mechanism of action is more targeted than might be anticipated, offering clear potential to be a well-tolerated new type of treatment.”
The paper also describes initial data from a phase 1a/2b hematological malignancy clinical trial.
Inobrodib can be well tolerated whilst demonstrating potential in treating relapsed refractory multiple myeloma and AML. It is an oral drug, a capsule taken twice daily.  A key patient preference is for treatments that are easy to administer and can be taken in community settings.  This also reduces the overall healthcare burden.
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Emma Searle, consultant haematologist at The Christie NHS Foundation Trust, who has overseen the care of many of the patients on the clinical trial, said: “Early clinical data shows promising tolerability, a key factor in treating patients with relapsed, refractory multiple myelomarelapsed, refractory multiple myeloma who have exhausted standard-of-care therapies.  We look forward to sharing efficacy data at ASH in December.”
Leif Bergsagel, is professor of medicine for the Mayo Clinic College of Medicine, and a consultant in the division of hematology and medical oncology, department of internal medicine, at Mayo Clinic in Arizona.
He said: “This new paper supports that targeting p300/CBP to treat hematological malignancies is showing increasing potential.  It is clearly a distinctly new approach beyond the existing standard of care therapies and others in late-stage development.”
CellCentric’s ongoing blood cancer trial​ involves patients with a range of hematological malignancies, including in relapsed/refractory multiple myeloma.
Good safety profile
Inobrodib is a new type of treatment for people with cancer. Delivered as an oral capsule, CellCentric says it is easy for patients to take and can be used at home without the need for intensive monitoring. As it has a good safety profile for a drug in this setting, it may be used by those who are unable to tolerate other treatments, including the elderly and frail.
The company added that this potentially represents a significant benefit over existing treatment options as it enables a wider range of patients to be treated, including those who want to be treated closer to home. Being an oral capsule, it has the potential to present a lower overall burden on the healthcare system as compared to more complex therapies, such as cell-based therapies. In June 2023, CellCentric was granted orphan drug and fast track designation status from the FDA for inobrodib.
Further clinical data will be announced at the American Society for Hematology annual meeting (ASH), San Diego 9-12 December 2023.
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