Incyte Reports Positive Data on Neoplasm Drug

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Incyte is reporting the first clinical data from two studies evaluating the safety, tolerability and efficacy of INCA033989, a novel, first-in-class targeted monoclonal antibody in patients with mutant calreticulin (mutCALR)-expressing myeloproliferative neoplasms (MPNs). The studies evaluated the safety and efficacy of INCA033989 in patients with essential thrombocythemia (ET) as measured by hematologic response and reduction in mutCALR variant allele frequency (VAF), the company says.

Data showed “rapid and durable normalization of platelet counts across all dose levels, with a trend toward improved responses in higher doses (greater than 400 mg), in patients with ET treated with INCA033989,” the company says. “Notably, 86% of patients at doses 400 mg and above achieved a complete or partial hematologic response, with the majority (82%) of patients achieving complete response. Eighty-nine percent of evaluable patients (34/38) showed a reduction in mutCALR VAF from baseline.”

Additionally, Incyte says the studies showed that INCA033989 was well tolerated across all dose cohorts (24 to 2,500 mg), with no dose-limiting toxicities observed. One patient discontinued treatment, and one patient had a dose reduction due to treatment-emergent adverse events.

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