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ASCO 2026 | Selective PARP1 inhibitors show promise in ovarian and breast cancer

Martin Hojgaard, MD, Rigshospitalet, Copenhagen, Denmark, discusses the potential of selective PARP1 inhibitors in ovarian and breast cancers, highlighting the EIK1003-001 trial (NCT06253130) which showed responses in patients previously treated with current-generation PARP inhibitors. PARP1 inhibitors also has combinability with chemotherapy, such as paclitaxel, opening up new avenues for treatment, particularly in ovarian cancer where it may also be combined with platinum compounds. This interview took place during the 2026 American Society of Clinical Oncology (ASCO) Meeting in Chicago, IL.

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Transcript

Firstly, for selective PARP-1 inhibitors, where it precisely fits in currently remains to be seen. But for the EIK1003 study, we had patients previously treated with current-generation PARP inhibitors, Olaparib, Rucaparib, Niraparib, and so forth. And some of these patients also responded to treatment. So this may represent another treatment opportunity for previously PARP inhibitor-treated patients...

Firstly, for selective PARP-1 inhibitors, where it precisely fits in currently remains to be seen. But for the EIK1003 study, we had patients previously treated with current-generation PARP inhibitors, Olaparib, Rucaparib, Niraparib, and so forth. And some of these patients also responded to treatment. So this may represent another treatment opportunity for previously PARP inhibitor-treated patients. Also, since the PARP-1 inhibitor here, IK-1003, actually is combinable with chemotherapy, in this case Paclitaxel, this opens a whole new avenue of potential treatment opportunities for patients where the PARP-1 inhibitor may be safely combined with Paclitaxel here, but down the road also other compounds, in particular platinum compounds for ovarian cancer.

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