Santaris Pharma advances into drug development SPC5001 research candidate against PCSK9

Santaris Pharma A/S, a clinical-stage biopharmaceutical company focused on the discovery and development of RNA-targeted therapies, today announced that it has advanced into drug development a discovery research candidate directed against PCSK9 (proprotein convertase subtilisin/kexin type 9), an important new target for the treatment of high cholesterol. Using its proprietary Locked Nucleic Acid (LNA) Drug Platform and Drug Discovery Engine, Santaris Pharma A/S identified and advanced the new drug, SPC5001, in just 18 months.

High cholesterol is a major risk factor for coronary heart disease, heart attack and stroke. According to the World Health Organization, high cholesterol is estimated to cause 18% of strokes and 56% of heart disease, globally and amounts to approximately 4.4 million deaths and 40.4 million disability-adjusted life years(1).

Santaris Pharma A/S presented preclinical data on SPC5001 last month at the PCSK9 Conference "From gene to therapeutics" in Nantes, France where many top pharmaceutical companies gathered to discuss efforts to develop therapies aimed at inhibiting the important new target PCSK9, a protein involved in regulating LDL (low-density lipoprotein) or "bad" cholesterol in the blood.

Data presented by Santaris Pharma A/S scientists showed that SPC5001 provided potent, specific and long-lasting inhibition of PCSK9 and lowered mean LDL cholesterol by 50% in non-human primates with a sustained reduction of 74% in the highest responder. SPC5001 did not change HDL (high-density lipoprotein) levels or the "good" cholesterol in the blood(2). The preclinical data suggest that SPC5001 has the potential to provide patients with a new treatment option in managing their cholesterol levels.

"There is a lot of interest in PCSK9 as an exciting new target for the treatment of high cholesterol and having demonstrated that SPC5001 effectively lowers LDL or the 'bad' cholesterol in preclinical studies, we are quickly moving forward with plans to advance SPC5001 into clinical studies as a potential new treatment to help patients better manage the risks of cardiovascular diseases," said Henrik Orum, PhD, Vice President and Chief Scientific Officer of Santaris Pharma A/S. "SPC5001 is a testament to the efficiency of our LNA Drug Platform and Drug Discovery Engine as we discovered, optimized and advanced SPC5001 into preclinical development in just 18 months."

The LNA Drug Platform and Drug Discovery Engine developed by Santaris Pharma A/S combines the Company's proprietary LNA chemistry with its highly specialized and targeted drug development capabilities to rapidly deliver potent single-stranded LNA-based drug candidates for a range of diseases including metabolic disorders, infectious and inflammatory diseases, cancer and rare genetic disorders.

"In addition to advancing SPC5001 into drug development for the treatment of high cholesterol, we remain on track to begin Phase 2 clinical trials of miravirsen (SPC3649) in patients with Hepatitis C in the second half of this year," said Soren Tulstrup, President and Chief Executive Officer, Santaris Pharma A/S. "In our internal programs and partnered programs, the versatility and broad utility of Santaris Pharma A/S LNA Drug Platform and Drug Discovery Engine continues to be critical in developing effective RNA-targeted therapies with high affinity, target specificity and remarkable potency for a range of diseases."

SPC5001 adds to the portfolio of Santaris Pharma A/S drugs in development, including its most advanced compound miravirsen, the International Nonproprietary Name (INN) or generic name for the compound formerly known as SPC3649.

Miravirsen, the first microRNA-targeted drug to enter human clinical trials, is a specific inhibitor of miR-122, a liver-specific microRNA that the Hepatitis C virus requires for replication. Unlike Hepatitis C therapies that directly target the virus, miravirsen works by removing a "helper" molecule (miR-122) that the virus needs in order to make new copies. Miravirsen is being studied in a Phase 1 trial multiple-ascending dose study in healthy volunteers and a Phase 2 study in patients infected with Hepatitis C is expected to begin in the second half of 2010.

Santaris Pharma A/S also has a broad range of drug discovery and development programs with its partners: Shire plc (lead candidates against up to five targets for rare genetic disorders), Pfizer (lead candidates against up to ten targets), GlaxoSmithKline (options to drug candidates from up to four viral disease programs) and Enzon Pharmaceuticals (lead candidates against eight cancer targets successfully delivered).