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Abstract CT165: Phase II open label trial of minnelide™ in patients with chemotherapy refractory metastatic pancreatic cancer

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BackgroundTriptolide and its water-soluble prodrug, Minnelide™, have shown promising activity against pancreatic ductal adenocarcinoma (PDAC) in both in vitro and in vivo experiments. Triptolide induces apoptosis in pancreatic cancer cells… Click to show full abstract

BackgroundTriptolide and its water-soluble prodrug, Minnelide™, have shown promising activity against pancreatic ductal adenocarcinoma (PDAC) in both in vitro and in vivo experiments. Triptolide induces apoptosis in pancreatic cancer cells by different pathways, including caspase-dependent apoptotic death and caspase -independent autophagic death. It inhibits the activity of the TFIIH general transcription factor complex and modulates the transcriptional landscape of both the stroma and cancer cell compartments. In the epithelial tumour compartment, triptolide down-regulates key transcription factors such as c-MYC. In the phase I clinical trial of Minnelide™ significant activity in highly refractory metastatic pancreatic carcinoma was observed. Hence we undertook this study in patients with chemotherapy refractory metastatic PDAC. MethodsEligibility criteria include stage IV PDAC that has progressed on standard chemotherapy, Karnofsky performance status ≥ 70%, and measurable disease. Planned sample size is up to 35 patients with interim analysis after the first 18 evaluable patients, aiming for at least a 20% difference in DCR (10% v 30%). Minnelide™ 0.67 mg/m2 is administered intravenously over 30 minutes on days 1-21, followed by a 7 day rest period in a 28 day cycle. Exploratory objectives include: analysis of tumor texture on radiologic scans as a non-invasive biomarker for response, as well as analyses of paired tumour biopsies for changes in immune cell infiltration, stromal activation, chromatin accessibility, phopshoproteomics and metabolism. # NCT03117920The trial opened 4/2017 and as of 12/2018, 18 patients have been treated. Supported by SU2C, Cancer Research UK, Lustgarten Foundation Citation Format: David Propper, Haiyong Han, Daniel Von Hoff, Erkut Borazanci, Tannishtha Reya, Jonathan Ghergurovich, Irina Pshenichnaya, Corina Antal, Rachel Condjella, Shreya Sharma, Peter O9Dwyer, Trevor Littlewood, Hitendra Patel, Ashok Saluja, Mohana Velagapudi, Lifeng Yang, Michael Downes, Ronald Evans, Gerard Evan. Phase II open label trial of minnelide™ in patients with chemotherapy refractory metastatic pancreatic cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr CT165.

Keywords: trial minnelide; refractory metastatic; cancer; pancreatic cancer

Journal Title: Clinical Trials
Year Published: 2019

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