• Zanubrutinib demonstrated a high overall response rate of 80 percent
• Zanubrutinib was recently granted Fast Track Designation by the US FDA for Waldenström macroglobulinemia (WM)
• BeiGene plans to submit an NDA to the FDA for zanubrutinib as a potential treatment for patients with WM in the first half of 2019

BeiGene, Ltd. (NASDAQ: BGNE; HKEX: 06160) announced on 10/24/18 the acceptance by the China National Medical Products Administration (NMPA) of a new drug application (NDA) for zanubrutinib, an investigational Bruton's tyrosine kinase (BTK) inhibitor, for the treatment of patients with relapsed/refractory (R/R) chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL). Zanubrutinib was discovered in BeiGene’s research facilities in Beijing, China, and is being developed globally by BeiGene as a monotherapy and in combination with other therapies to treat various hematologic malignancies. In August, the NMPA accepted BeiGene’s first NDA for zanubrutinib for the treatment of patients with R/R mantle cell lymphoma (MCL).

“We are delighted that the submission for zanubrutinib in patients with relapsed/refractory CLL/SLL was accepted by the NMPA in China, and we are excited to announce the top-line pivotal data for zanubrutinib in these patients, which demonstrated a high overall response rate of 80 percent despite a relatively short follow-up. These results in China are also consistent with the data from our global studies,” said Dr. Xiaobin Wu, General Manager of China and President of BeiGene, Ltd.

The NDA is supported by an extensive clinical, non-clinical and chemistry, manufacturing and control (CMC) data package, including the results from a 91-patient single-arm pivotal Phase 2 study in Chinese patients with R/R CLL/SLL treated with zanubrutinib, dosed at 160 mg orally twice daily. An independent review of response data from this study, with a data cut-off of June 15, 2018 and a median follow-up of 9.1 months, showed an overall response rate (ORR) of 80 percent, inclusive of complete response (2%), partial response (39%), and partial response with lymphocytosis (40%). The median duration of response has not been reached, as a majority of the responders remain in a response. The safety profile was consistent with previously reported clinical data for zanubrutinib. Updated data with additional follow-up of the patients in the study will be submitted to the NMPA as an additional document of the NDA and are planned to be presented at an upcoming medical conference.

Zanubrutinib was recently granted Fast Track Designation by the U.S. Food and Drug Administration (FDA) for the treatment of patients with Waldenström macroglobulinemia (WM). BeiGene plans to submit an NDA to the FDA for zanubrutinib as a potential treatment for patients with WM in the first half of 2019 based on results from a global Phase 1 study.

Zanubrutinib (BGB-3111) is an investigational small molecule inhibitor of Bruton’s tyrosine kinase (BTK) that is currently being evaluated in a broad pivotal clinical program globally and in China as a monotherapy and in combination with other therapies to treat various B cell malignancies. Bruton’s tyrosine kinase (BTK) is a non-receptor kinase that plays a crucial role in oncogenic signaling that is critical for proliferation and survival of leukemic cells in many B cell malignancies. BTK was initially shown to be defective in the primary immunodeficiency X-linked agammaglobulinemia (XLA) and is essential both for B cell development and function of mature B cells.