Around 10% of high-grade serous ovarian carcinomas (HGSOC) harbor BRCA1 promoter methylation, but it is uncertain how it predicts response to PARP inhibition. Here, the authors show that homozygous BRCA1 methylation predicts response to rucaparib while heterozygous methylation of BRCA1 predicts resistance in HGSOC.
- Olga Kondrashova
- Monique Topp
- Clare L. Scott