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Ref Type Journal Article
PMID (25676869)
Authors Okusaka T, Ueno H, Ikeda M, Mitsunaga S, Ozaka M, Ishii H, Yokosuka O, Ooka Y, Yoshimoto R, Yanagihara Y, Okita K
Title Phase 1 and pharmacological trial of OPB-31121, a signal transducer and activator of transcription-3 inhibitor, in patients with advanced hepatocellular carcinoma.
Journal Hepatology research : the official journal of the Japan Society of Hepatology
Vol 45
Issue 13
Date 2015 Dec
URL
Abstract Text To evaluate the safety, pharmacokinetics and antitumor activity of OPB-31121, a signal transducer and activator of transcription-3 inhibitor, in patients with advanced hepatocellular carcinoma (HCC).HCC patients of Child-Pugh A or B who progressed on, or were intolerant to, sorafenib were eligible for this phase 1 trial. We used a standard 3 + 3 dose-escalation design with a 28-day cycle at dose levels of 50, 100, 200 and 400 mg/day. Tumor responses were assessed using the modified Response Evaluation Criteria in Solid Tumors.Twenty-four patients were enrolled, of whom 23 received OPB-31121 (20 males; median age, 65 years). The most common adverse drug reactions were nausea (87.0%), vomiting (82.6%), diarrhea (69.6%), fatigue/malaise (52.2%), anorexia (47.8%) and peripheral sensory neuropathy (26.1%). The recommended dose for OPB-31121 was determined to be 200 mg. Six patients had stable disease for 8 weeks or more, resulting in disease control rates of 25.0-42.9%. In the 200-mg dose cohort, three of seven patients had stable disease and a median time to progression of 61.0 days. The maximum concentration and area under the plasma concentration-time curve of OPB-31121 were dose proportional.OPB-31121 demonstrated insufficient antitumor activity for HCC. Furthermore, peripheral nervous system-related toxicities may negatively affect long-term administration of OPB-31121. Therefore, it was deemed difficult to continue the clinical development of OPB-31121 for treating advanced HCC and further investigation is expected in the agent with favorable profile in this category.

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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
OPB-31121 OPB 31121 STAT3 Inhibitor 19 OPB-31121 is a small molecule inhibitor of Stat3 that demonstrates antitumor activity (PMID: 23402820, PMID: 25715763, PMID: 25676869, PMID: 24819685).
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
Unknown unknown hepatocellular carcinoma no benefit OPB-31121 Phase I Actionable In a Phase I trial, OPB-31121 treatment resulted in only stable disease in 26% (6/23) of patients with advanced hepatocellular carcinoma, and was considered insufficient for clinical efficacy (PMID: 25676869). 25676869