OnCo
pairingsPairing

PARP inhibitor + bevacizumab maintenance (HRD-positive)

In tumours with faulty DNA repair, adding olaparib to bevacizumab maintenance roughly doubled progression-free time and improved survival.

PAOLA-1: PFS 37.2 vs 17.7 months (HR 0.33) and 5-year OS 65.5% vs 48.4% in HRD-positive disease; no benefit in HRD-negative tumours. Approved 2020. The combination made HRD testing a routine first-line decision.

Rationale
Anti-angiogenic hypoxia may increase HRD-like states and PARP dependence; the two agents have non-overlapping toxicity.
Evidence
Phase 3 with OS benefit in HRD-positive subgroup.

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