Download MendeleyDiscovery of BBI-355, a Potent, Selective, and Orally Available Checkpoint Kinase 1 Inhibitor for the Treatment of Extrachromosomal DNA Oncogene-Amplified Cancers.
Meyer, S.T., Chowdhry, S., Elsdon, R.J., Mauger, J., Truong, Y.P.H., Hansen, R., Plum, J., Steffy, A., Pferdekamper, A., Norman, B., Garcia, S., Tse, E., Apuy, J., Ardeshiri, A., Kasibhatla, S., Hassig, C.A., Pinkerton, A.B.(2026) J Med Chem 69: 17814-17824
- PubMed: 42457651 Search on PubMed
- DOI: https://doi.org/10.1021/acs.jmedchem.6c00822
- Primary Citation Related Structures:
35WF, 35WG - PubMed Abstract:
Checkpoint kinase 1 (CHK1), a master regulator of replication stress, has been investigated as a potential therapeutic target for over two decades. More recently, CHK1 has been implicated as a target for the treatment of ecDNA-driven, oncogene-amplified cancers. However, clinical-stage CHK1 inhibitors have historically faced challenges related to dosing schedule, tolerability, and clinical efficacy, although recent studies suggest that biomarker-driven approaches and alternative dosing strategies may address some of these limitations. Structure-guided optimization led to the discovery of BBI-355, a potent, selective, and orally available CHK1 inhibitor. BBI-355 demonstrates strong antitumor activity when dosed orally in mouse xenograft models, achieving regressions both as a single agent and in combination with targeted therapies. BBI-355 also displays favorable ADMET and PK properties and has been advanced to a clinical trial for patients with oncogene amplified cancers.
- Boundless Bio, Inc, 10955 Alexandria Way Suite 100, San Diego, California 92121, United States.
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