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PMID
Authors Kathryn F. Mileham; Michael Rothe; Pam K. Mangat; Elizabeth Garrett-Mayer; Eddy S. Yang; Olatunji B. Alese; Angela Jain; Herbert L. Duvivier; Phillip Palmbos; Eugene R. Ahn; Jeanny B. Aragon-Ching; Kathleen W. Beekman; Deepti Behl; Funda Meric-Bernstam; Rodolfo Gutierrez; Amy Sanford; Ramya Thota; Michael Zakem; Song Zhao; Raegan O'Lone; Gina N. Grantham; Susan Halabi; Richard L. Schilsky
Title Olaparib (O) in patients (pts) with solid tumors with ATM mutation or deletion: Results from the Targeted Agent and Profiling Utilization Registry (TAPUR) Study
Journal Vol Issue Date Pages Journal Short Title
Cancer Res 82 12_Suppl
URL https://aacrjournals.org/cancerres/article/82/12_Supplement/CT110/701919/Abstract-CT110-Olaparib-O-in-patients-pts-with
Abstract Text Background: TAPUR is a phase II basket study evaluating anti-tumor activity of commercially available targeted agents in pts with advanced cancers with specific genomic alterations. Results in a cohort of pts with solid tumors with ATM mutation (mut) or deletion (del) treated with O are reported. Methods: Eligible pts had solid tumors, no standard treatment (tx) options, measurable disease, ECOG Performance Status (PS) 0-2, and adequate organ function. Genomic testing was performed in CLIA-certified, CAP-accredited site selected labs. Pts received O tablets (300mg) or capsules (400mg) orally twice daily until disease progression. Low accruing histology-specific cohorts with the same genomic alteration were collapsed into one histology-pooled cohort for this analysis. Primary endpoint was disease control (DC) (complete (CR) or partial (PR) response or stable disease at 16+ wks (SD16+)) (RECIST v1.1). For histology-specific cohorts a Simon 2-stage design with a null DC rate of 15% vs. 35% (power = 0.85; α = 0.10) requires 28 pts with futility stopping after 10 pts. For histology-pooled cohorts with sample size > 28, if the lower limit of a one-sided 90% CI is >15%, the null hypothesis of a DC rate of 15% is rejected. 2-sided 95% CIs were used for other efficacy endpoint estimates. Secondary endpoints were progression-free survival (PFS), overall survival (OS) and safety. Results: 39 pts with solid tumors (17 histologies) with ATM mut (n=36) or del (n=3) were enrolled from 6/2016 to 1/2019. 3 pts were unevaluable for efficacy. Table 1 shows demographics and outcomes. 1 CR (prostate), 2 PR (unknown primary) and 6 SD16+ were observed in pts with ATM mut for a DC rate of 25% (90% CI: 16%, 100%) and an OR rate of 8% (95% CI: 2%, 23%). The null DC rate was rejected. 9 pts had ≥1 Grade 3 tx-related adverse or serious adverse event related to O. Conclusions: Monotherapy O showed evidence of anti-tumor activity in pts with various solid tumors with ATM mut.

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