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Cancer therapy

Expanding biomarkers for PARP inhibitors

The efficacy of talazoparib and other PARP inhibitors has been primarily reported in germline BRCA mutation carriers. New results establish germline mutations in PALB2, but not in other homologous recombination (HR) genes, as targets for PARP inhibitors in breast cancer, whereas the added predictive value of HR signatures remains uncertain.

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Fig. 1: Testing for homologous recombination deficiency.

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Correspondence to Francois-Clement Bidard.

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Competing interests

F.-C.B. declares research grants, speaker and advisory board honoraria from Pfizer and Astra-Zeneca, and advisory board honoraria from GSK. F.C. declares no competing interests.

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Coussy, F., Bidard, FC. Expanding biomarkers for PARP inhibitors. Nat Cancer 3, 1141–1143 (2022). https://doi.org/10.1038/s43018-022-00440-8

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