EISAI RECEIVES APPROVAL IN JAPAN FOR ANTICANCER AGENT LENVIMA(R) (LENVATINIB MESYLATE) AS TREATMENT FOR UNRESECTABLE THYROID CANCER

On March 26, 2015 Eisai reported that it has received manufacturing and marketing authorization in Japan for its in-house developed novel anticancer agent Lenvima (lenvatinib mesylate) indicated for the treatment of unresectable thyroid cancer (Press release, Eisai, MAR 26, 2015, View Source [SID:1234502553]).

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In a global Phase III study (the SELECT study) of Lenvima in differentiated thyroid cancer, Lenvima demonstrated a statistically significant extension in progression free survival and improved response rates compared to placebo1. In the SELECT study, the five most common Lenvima treatment-related adverse events of any grade were hypertension, diarrhea, fatigue or asthenia, decreased appetite, and weight loss. Furthermore, a Phase II study (Study 208) conducted in Japan suggested efficacy and tolerability of Lenvima in medullary thyroid carcinoma and anaplastic thyroid carcinoma as well2. Due to the results of these studies, Lenvima is the first molecular targeted treatment in Japan approved with an indication for unresectable thyroid cancer which covers differentiated thyroid cancer as well as medullary thyroid carcinoma and anaplastic thyroid carcinoma.

The number of patients with thyroid cancer in Japan is estimated to be between 13,000 and 29,000. Although treatment is possible for most types of thyroid cancer, there are few treatment options available for unresectable thyroid cancer and so there is a pressing need for the development of new treatment options. With a high degree of clinical malignancy and a prognosis among the worst of all types of cancer, anaplastic thyroid carcinoma in particular is a disease with significant unmet medical needs. Through this approval, Eisai hopes that Lenvima will make a contribution to patients as a new standard treatment for unresectable thyroid cancer, which has no established standard treatment in Japan at present.

Lenvima is an orally administered molecular targeted agent that selectively inhibits the activities of several different molecules including VEGFR, FGFR, RET, KIT and PDGFR. In particular, the agent simultaneously inhibits VEGFR, FGFR and also RET which are especially involved in tumor angiogenesis and proliferation of thyroid cancer. Furthermore, Lenvima has been confirmed through X-ray co-crystal structural analysis to demonstrate a new binding mode (Type V) to VEGFR2, and exhibits rapid binding to the target molecule and potent inhibition of kinase activity, according to kinetic analysis3.

Lenvima was launched in the United States indicated for the treatment of locally recurrent or metastatic, progressive, radioactive iodine-refractory differentiated thyroid cancer in February 2015. Currently, the agent is undergoing regulatory review in the EU, as well as Switzerland, South Korea, Canada, Singapore, Russia, Australia and Brazil. Furthermore, Eisai is conducting a global Phase III trial of Lenvima in hepatocellular carcinoma as well as Phase II studies of Lenvima in several other tumor types such as renal cell carcinoma and non-small cell lung cancer. Eisai Co., Ltd. No.15-20 March 26, 2015 In addition to providing Lenvima as a new treatment option for thyroid cancer, in accordance with the conditions of approval, Eisai will work after launch to carry out an observational study and promote the appropriate use of Lenvima. Eisai is committed to exploring the potential clinical benefits of Lenvima in order to further contribute to patients with cancer, and their families.