Reference Detail

Ref Type

Journal Article

PMID

(37773077)

Authors

Ring A, Kilburn LS, Pearson A, Moretti L, Afshari-Mehr A, Wardley AM, Gurel B, Macpherson IR, Riisnaes R, Baird RD, Martin S, Roylance R, Johnson H, Ferreira A, Winter MC, Dunne K, Copson E, Hickish T, Burcombe R, Randle K, Serra V, Llop-Guevara A, Bliss JM, Turner NC

Title

Olaparib and Ceralasertib (AZD6738) in Patients with Triple-Negative Advanced Breast Cancer: Results from Cohort E of the plasmaMATCH Trial (CRUK/15/010).

Journal	Vol	Issue	Date	Pages	Journal Short Title
Clinical cancer research : an official journal of the American Association for Cancer Research	29	23	2023 Dec 01	4751-4759	Clin Cancer Res

URL

Abstract Text

Approximately 10% to 15% of triple-negative breast cancers (TNBC) have deleterious mutations in BRCA1 and BRCA2 and may benefit from PARP inhibitor treatment. PARP inhibitors may also increase exogenous replication stress and thereby increase sensitivity to inhibitors of ataxia telangiectasia and Rad3-related (ATR) protein. This phase II study examined the activity of the combination of PARP inhibitor, olaparib, and ATR inhibitor, ceralasertib (AZD6738), in patients with advanced TNBC.Patients with TNBC on most recent biopsy who had received 1 or 2 lines of chemotherapy for advanced disease or had relapsed within 12 months of (neo)adjuvant chemotherapy were eligible. Treatment was olaparib 300 mg twice a day continuously and celarasertib 160 mg on days 1-7 on a 28-day cycle until disease progression. The primary endpoint was confirmed objective response rate (ORR). Tissue and plasma biomarker analyses were preplanned to identify predictors of response.70 evaluable patients were enrolled. Germline BRCA1/2 mutations were present in 10 (14%) patients and 3 (4%) patients had somatic BRCA mutations. The confirmed ORR was 12/70; 17.1% (95% confidence interval, 10.4-25.5). Responses were observed in patients without germline or somatic BRCA1/2 mutations, including patients with mutations in other homologous recombination repair genes and tumors with functional homologous recombination deficiency by RAD51 foci.The response rate to olaparib and ceralasertib did not meet prespecified criteria for activity in the overall evaluable population, but responses were observed in patients who would not be expected to respond to olaparib monotherapy.

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Molecular Profile	Treatment Approach

Gene Name	Source	Synonyms	Protein Domains	Gene Description	Gene Role

Therapy Name	Drugs	Efficacy Evidence	Clinical Trials

Drug Name	Trade Name	Synonyms	Drug Classes	Drug Description

Gene	Variant	Impact	Protein Effect	Variant Description	Associated with drug Resistance

Molecular Profile	Indication/Tumor Type	Response Type	Therapy Name	Approval Status	Evidence Type	Efficacy Evidence	References
PALB2 inact mut	triple-receptor negative breast cancer	predicted - sensitive	Ceralasertib + Olaparib	Case Reports/Case Series	Actionable	In a Phase II trial (plasmaMATCH), treatment with the combination of Lynparza (olaparib) and Ceralasertib (AZD6738) resulted in limited efficacy in patients with advanced triple-negative breast cancer, with an objective response rate of 17.1% (12/70), including a complete response in a patient with a germline mutation in PALB2 (PMID: 37773077; NCT03182634).	37773077
ATM loss	triple-receptor negative breast cancer	predicted - sensitive	Ceralasertib + Olaparib	Phase II	Actionable	In a Phase II trial (plasmaMATCH), treatment with the combination of Lynparza (olaparib) and Ceralasertib (AZD6738) resulted in limited efficacy in patients with advanced triple-negative breast cancer, with an objective response rate of 17.1% (12/70), but in patients with wild-type BRCA1/2 and ATM loss, resulted in a median progression-free survival of 3.4 vs 2.5 mo and response rate of 21.4 (3/14) vs 13.8% (4/29) in patients without loss of ATM (PMID: 37773077; NCT03182634).	37773077