On October 18, 2016 Athenex reported that its development partner for KX-02, Xiangxue Pharmaceuticals Company Limited, has publicized that the Guangdong Province Food and Drug Administration (FDA) declared completion of the Investigational New Drug (IND) application for KX-02 active pharmaceutical ingredient and KX-02 Tablet and referred the IND to the Center of Drug Evaluation (CDE) of China FDA for review (Press release, Athenex, OCT 18, 2016, View Source [SID1234525097]). The IND application to the Chinese FDA was submitted jointly by Xiangxue New Drug Development Company Limited, Xiangxue Pharmaceuticals Limited, and Hangzhou Converd Co., Ltd.
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The Guangdong Province FDA has determined, after their inspection of the factory and initial review of the IND submission, that it is complete and was referred to the Center of Drug Evaluation (CDE) of China FDA for review. This IND application has been assigned the application number CXHL1600187.
In 2012, Athenex and Xiangxue Pharmaceuticals announced the execution of a license agreement granting Xiangxue Pharmaceuticals exclusive rights to KX-02, for all oncology indications, in the greater China territory (China, Hong Kong, Taiwan) and Singapore.
KX-02, a novel lipophilic dual Src/pretubulin inhibitor, was discovered and developed by Athenex through their internal research and development efforts. It is a small molecule that has shown potent inhibitory activity against a broad panel of brain tumor cell lines, including cells (T98G) that are resistant to Temodar, the most widely used chemotherapy for the treatment of malignant glioma. In a well-established brain tumor animal model, KX-02 has been shown to consistently clear brain tumors after 4 weeks of therapy in 30-60% of treated animals. Pharmacokinetic studies showed that KX-02 is absorbed orally and has 76% penetration to brain tissue from plasma.
KX-02 is already in Phase 1 study in the US and has been assigned "Orphan Drug" status by the US FDA. Preclinical studies have shown that KX-02 showed excellent brain penetration and promising anti-tumor activities in mouse brain tumor models. A proportion of rodents cleared the tumor after 6 weeks of oral KX-02 treatment.