Abstract 2427
Background
Prostate cancer is the most common malignant tumor in men and is the second leading cause of cancer-related deaths in men. Recently there are several 2nd generations of anti-androgen therapies approved and used widely in clinics. However, many patients (pts) relapse after a period of treatment in clinic due to various resistant mechanisms and require new drug or additional therapy. GT0918 is a new chemical entity of androgen receptor (AR) antagonist with more specificity and activity in inhibiting ARs with reduced drug accumulation in the CNS and also show activities on AR mutations including ART878A leading AR drug resistance in cell assays. In early phase I clinical trial of dose escalation study (NCT02826772), GT0918 was shown well tolerated in mCRPC pts progressed lines of standard and experimental therapies with some durable responses. 400mg and 500mg orally once daily were selected warranted for further clinical testing.
Trial design
The study is an open-label, randomized, multicenter, trial to assess GT0918 in mCRPC pts progressed after either abi or enza. The primary object is to evaluate the safety and tolerability of GT0918 either 400 mg or 500 mg daily dose to determine the RP2D for Ph III and/or other confirming studies. The secondary objectives are to evaluate efficacy endpoints including≥ 50% PSA suppression, the percentage of radiographic disease progression, the time to radiographic and bone progression, the time to PSA progression. The key eligibility includes histologically confirmed mCRPC, prior failed therapy either abi or enza (only 1 prior chemotherapy is allowed), progression defined by PCWG 3 criteria, and life expectancy of ≥ 6 months (at screening). 60 pts are enrolled at 12 US sites and randomized in a 1:1 ratio to orally take 400 mg or 500 mg of GT0918 once daily for initial treatment of 6 months. Pts will continue treatment with GT0918 up to 12 months at their assigned dose until disease progression, intolerable toxicities (AEs), or withdrawn consent. The trial started in May 2019. An interim analysis of both safety and efficacy will be performed after 30 pts become evaluable.
Clinical trial identification
NCT03899467 (April 2, 2019).
Editorial acknowledgement
Legal entity responsible for the study
Suzhou Kintor Pharmaceuticals Inc.
Funding
Suzhou Kintor Pharmaceuticals Inc.
Disclosure
N.J. Vogelzang: Advisory / Consultancy: Pfizer; Advisory / Consultancy: Janssen; Advisory / Consultancy: Sanofi; Advisory / Consultancy: Bayer. P. Zhang: Full / Part-time employment: Suzhou Kintor Pharmaceuticals Inc. K. Zhou: Full / Part-time employment: Suzhou Kintor Pharmaceuticals Inc. All other authors have declared no conflicts of interest.
Resources from the same session
3140 - Phase 2 study of olaparib in previously treated advanced solid tumors with homologous recombination repair mutation (HRRm) or homologous recombination repair deficiency (HRD): LYNK-002
Presenter: David Hyman
Session: Poster Display session 3
Resources:
Abstract
2655 - The K-BASKET trial: A prospective phase II biomarker-driven multiple basket trial in Korean solid cancer patients.
Presenter: Seul Kim
Session: Poster Display session 3
Resources:
Abstract
5938 - Cambridge Liquid biopsy “CALIBRATION” study: Can changes in circulating tumour DNA (ctDNA) predict durable tumour responses in patients with advanced oesophageal cancer receiving MEDI4736?
Presenter: Constanza Linossi
Session: Poster Display session 3
Resources:
Abstract
3799 - Validation of a tumour mutational burden workflow on routine histological samples of colorectal cancer and assessment of a cohort with synchronous hepatic metastases
Presenter: Andrea Mafficini
Session: Poster Display session 3
Resources:
Abstract
4647 - Microsatellite Instability Testing and Lynch Syndrome Screening For Colorectal Cancer Patients Through Tumor Sequencing
Presenter: Li Liu
Session: Poster Display session 3
Resources:
Abstract
3231 - "Liquid Withdarw" technique in CT-guided cutting needle lung biopsy: decreased incidence of complications and increased tissue amount for lung cancer molecular testing.
Presenter: Xue Wang
Session: Poster Display session 3
Resources:
Abstract
3282 - WGS Implementation in standard cancer Diagnostics for Every cancer patient (WIDE)
Presenter: Paul Roepman
Session: Poster Display session 3
Resources:
Abstract
5905 - Known and unknown gene fusion detection capabilities of solid tumor laboratories conducting next generation sequencing in 6 countries
Presenter: Steph Finucane
Session: Poster Display session 3
Resources:
Abstract
4238 - Clinical and Analytical Accuracy of a 523 Gene Panel Next-Generation Sequencing (NGS) Assay on Formalin-Fixed Paraffin-Embedded (FFPE) Solid Tumor Samples
Presenter: Ina Deras
Session: Poster Display session 3
Resources:
Abstract
2493 - Methylation analysis of MLH1 using droplet digital PCR and methylation sensitive restriction enzyme.
Presenter: Celine De Rop
Session: Poster Display session 3
Resources:
Abstract