Journal
BRITISH JOURNAL OF CANCER
Volume 128, Issue 6, Pages 1040-1051Publisher
SPRINGERNATURE
DOI: 10.1038/s41416-022-02133-6
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This study evaluated the safety and efficacy of LXS196, an oral protein kinase C inhibitor, in patients with uveal melanoma. The results showed manageable toxicity and encouraging clinical activity of LXS196 in these patients.
Background Up to 50% of patients with uveal melanoma develop metastases (MUM) with a poor prognosis and median overall survival of approximately 1 year.Methods This phase I study evaluated the safety, tolerability, pharmacokinetics, pharmacodynamics and efficacy of the oral protein kinase C inhibitor LXS196 in 68 patients with MUM (NCT02601378). Patients received LXS196 doses ranging from 100-1000 mg once daily (QD; n = 38) and 200-400 mg twice daily (BID; n = 30).Results First cycle dose-limiting toxicities (DLTs) were observed in 7/38 (18.4%) QD and 2/17 (11.8%) BID patients. Hypotension was the most common DLT, occurring at doses & GE;500 mg/day, and manageable with LXS196 interruption and dose reduction. Median duration of exposure to LXS196 was 3.71 months (range: 1.81-15.28) for QD and 4.6 months (range: 0.33-58.32) for BID dosing. Clinical activity was observed in 6/66 (9.1%) evaluable patients achieving response (CR/PR), with a median duration of response of 10.15 months (range: 2.99-41.95); 45/66 had stable disease (SD) per RECIST v1.1. At 300 mg BID, the recommended dose for expansion, 2/18 (11.1%) evaluable patients achieved PR and 12/18 (66.7%) had SD.Conclusion These results suggest manageable toxicity and encouraging clinical activity of single-agent LXS196 in patients with MUM.
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