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Ref Type abstract
Authors Kristopher Wentzel, Michael Rothe, Pam K. Mangat, Elizabeth Garrett-Mayer, Li Ding, Evan Pisick, Mridula Krishnan, Deepti Behl, Olatunji B. Alese, Carmen J. Calfa, Kathrine A. Cooper, Herbert L. Duvivier, Raghava Reddy Induru, Janet C. Ruzich, Song Zhao, Gina N. Grantham, Abigail Gregory, Susan Halabi, Richard L. Schilsky
Title Abstract CT231: Temsirolimus (T) in patients (pts) with solid tumors with PTEN mutation (mut): results from the Targeted Agent and Profiling Utilization Registry (TAPUR) Study.
Abstract Text Background: TAPUR is a phase II basket study evaluating antitumor 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 PTEN mut treated with T are reported. Methods: Eligible pts had 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. After antihistamine pre-tx, 25 mg T was infused over 30-60 minutes once weekly until disease progression. Low accruing histology-specific cohorts with PTEN mut were collapsed into 1 histology-pooled cohort for analysis. Primary end point was disease control (DC), defined as complete or partial response (PR) or stable disease (SD) of at least 16+ weeks (wks) duration (SD16+) per RECIST v1.1. The primary end point was summarized as a proportion and the hypothesized null DC rate of 15% was evaluated by a 1-sided exact binomial test with alpha 0.10. Other end points were progression-free survival (PFS), overall survival (OS), duration of response (DOR), duration of SD and safety. DOR is defined as time from pt’s first documented objective response (OR) until progressive disease (PD). Duration of SD is defined as time from tx start to PD. Results: 34 pts with solid tumors (10 tumor types; 20/34 pts had prostate, soft tissue sarcoma [STS] or lung) with PTEN mut were enrolled. 6 pts were unevaluable for efficacy, 1 was ineligible. Table shows demographics, outcomes and toxicity. 2 pts obtained PR (prostate and STS) and 5 had SD16+ (lung, head and neck, breast, uterine, and site unspecified) for DC rate of 26% (1-sided 90% CI: 15.1%, 100%) and OR rate of 7% (95% CI: 1%, 24%). The null DC rate was rejected. Median PFS was 10 wks and median OS was 32 wks. Conclusions: T met prespecified criteria to declare a signal of activity in pts with solid tumors with PTEN mut.


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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
PTEN inact mut Advanced Solid Tumor predicted - sensitive Temsirolimus Phase II Actionable In a Phase II trial (TAPUR), Torisel (temsirolimus) treatment resulted in a disease control rate of 26% (7/27, 2 partial responses and 5 with stable disease >=16 weeks) and an objective response rate of 7% (2/27) in patients with advanced solid tumors harboring inactivating PTEN mutations, with a median progression-free survival of 10 weeks and a median overall survival of 32 weeks (Cancer Res (2023) 83 (8_Supplement): CT231; NCT02693535). detail...