Arrowhead Completes Enrollment of First Cohort in Phase 2a Trial of Chronic Hepatitis B Candidate ARC-520

PASADENA, Calif., Apr 01, 2014 (BUSINESS WIRE) -- Arrowhead Research Corporation ARWR +10.40% , a biopharmaceutical company developing targeted RNAi therapeutics, today announced that the first cohort of 8 patients has been fully enrolled and dosed in a Phase 2a clinical trial of ARC-520, its RNAi therapeutic for the treatment of chronic hepatitis B virus (HBV) infection. The trial remains on schedule to meet the previously stated goal of completing dosing in the second quarter and releasing top line results in the third quarter.

“The pace of patient accrual for the ARC-520 Phase 2a study has been very encouraging with the first dose group being enrolled and dosed in just over a week,” said Christopher Anzalone, Ph.D., Arrowhead’s President and CEO. “According to the study protocol, we expect to begin dosing the next cohort in May and remain confident that we can release top line data in the third quarter. ARC-520 has the potential to be the first drug candidate ever to demonstrate consistent hepatitis B surface antigen reduction in humans, which is thought to be critical in achieving a functional cure for chronic HBV.”

The Phase 2a study is planned to enroll up to 16 chronic HBV patients in two dose cohorts with patients receiving either ARC-520 or placebo in combination with entecavir. The study is designed to evaluate the depth and duration of hepatitis B surface antigen decline, among other measures, in response to a single dose of ARC-520.

Arrowhead also announced that Zhen Li, Ph.D. has joined Arrowhead as Vice President of CMC and Manufacturing. Dr. Li will have overall leadership responsibilities for analytical methods development, process development, scale up, and production of all precursors, drug substance and drug product for the Company’s development candidates.

“Zhen’s experiences at Merck and Novartis will provide a strong foundation for Arrowhead to build global sourcing capabilities for our RNAi drug candidates”, said Bruce D. Given, MD, Arrowhead’s COO. “This hiring is a key component of our plans to build a multi-program pipeline of RNAi therapeutics based on Arrowhead’s DPC delivery technology.”

Prior to joining Arrowhead, Dr. Li was at Merck & Co., where she was a leader in RNAi Therapeutics, Process Chemistry and was responsible for research synthesis and supply chains for all siRNA delivery technologies and siRNA active substances. Dr. Li has also held leadership positions at Novartis and Schering Plough Pharmaceuticals. 

Read complete press release here

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