Apr. 19, 2016

Arrowhead Pharmaceuticals, Inc. (NASDAQ: ARWR) today presented a poster on ARC-HIF2, its preclinical development program targeting HIF2-α for the treatment of renal cell carcinoma (RCC), at the American Association for Cancer Research Annual Meeting 2016 (AACR16), in New Orleans. ARC-HIF2 is Arrowhead's first RNAi therapeutic program to target tissues outside the liver.

The poster titled, "Novel HIF-2α targeted RNAi therapeutic for renal cell carcinoma" (abstract 2064), describes data from various stages of development of ARC-HIF2, including RNAi trigger selection, HIF2-α target validation, delivery and targeting ligand validation, and multiple RCC tumor models. These data show that important advancements are being made in this program and for Arrowhead's Dynamic PolyconjugateTM (DPCTM) delivery platform generally, including the following key findings:
Proof-of-concept ligand dependent, functional delivery was demonstrated using the DPC targeted delivery platform.

Silencing HIF2-α expression by RNA interference resulted in reduction of HIF-2α regulated genes
In two different RCC tumor bearing mouse models, ARC-HIF2 inhibited tumor growth and promoted tumor cell death and structural degeneration.
A copy of the poster presentation is available on the Events and Presentations page under the Investors section of the Arrowhead website.