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‹ Wed · 1 Jul 2026
Novel or significantly improved treatment

A Phase Ib/II study of ceralasertib, a selective inhibitor of ATR, in patients with relapsed or refractory MDS and CMML.

A new leukemia drug called ceralasertib combined with existing therapy shows clinical promise in treatment-resistant blood cancers with few options.

This Phase Ib/II trial evaluated ceralasertib, a novel ATR inhibitor, combined with azacitidine in patients with relapsed/refractory myelodysplastic syndromes or chronic myelomonocytic leukemia. The study demonstrated clinical responses and tolerability in a patient population with limited therapeutic options, supporting further development of ATR inhibition in myeloid malignancies.

What the study was

Study design
Phase Ib/II clinical trial
Category
Drug Development
Maturity
Validated
Journal
Blood Adv

Why it surfaced

First clinical data for ATR inhibitor class in R/R MDS/CMML; high unmet need population; published in Blood Advances by established MGH/WashU consortium.

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