Multiple independent studies with Adipotide have demonstrated that obese rodents lose up to 30% of their body weight after only 28 days of treatment while lean animals show no weight loss. Studies have also shown that obese animals undergo rapid improvement in pro-diabetic metabolic markers, including significantly improved insulin sensitivity, improved glucose tolerance, and a reduction in serum triglycerides after only 2-3 days of treatment. Adipotide has been further studied in non-human primates, and it has been reported that after 28 days of treatment obese rhesus monkeys lost an average of 11% of their body weight, experienced a reduction in body mass index and abdominal circumference, and showed marked improvements in insulin resistance, a marker for type II diabetes. These data were published in the peer-reviewed journal Science Translational Medicine in November 2011 (Sci Trans Med 3, 108-112 (2011) DOI: 10.1126/scitraslmed.3002621).About Arrowhead Research Corporation Arrowhead Research Corporation is a clinical stage targeted therapeutics company with development programs in oncology, obesity, and infectious disease. The company is leveraging its platform technologies to design and develop peptide-drug conjugates (PDCs) that specifically home to cell types of interest while sparing off-target tissues, create targeted drugs based on the gene silencing RNA interference (RNAi) mechanism, and work with partners to create improved versions of traditional small molecule drugs. For more information please visit http://www.arrowheadresearch.com, or follow us on Twitter @ArrowRes. To be added to the Company's email list to receive news directly, please send an email to email@example.com Safe Harbor Statement under the Private Securities Litigation Reform Act: This news release contains forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. These statements are based upon our current expectations and speak only as of the date hereof. Our actual results may differ materially and adversely from those expressed in any forward-looking statements as a result of various factors and uncertainties, including our ability to finance our operations, the future success of our scientific studies, our ability to successfully develop drug candidates, the timing for starting and completing clinical trials, rapid technological change in our markets, and the enforcement of our intellectual property rights. Arrowhead Research Corporation's most recent Annual Report on Form 10-K and subsequent Quarterly Reports on Form 10-Q discuss some of the important risk factors that may affect our business, results of operations and financial condition. We assume no obligation to update or revise forward-looking statements to reflect new events or circumstances.