Quark Pharmaceuticals Announces Publication of Study on Use of siRNA against Proprietary Target for Inhibiting Tumor Growth and Sensitization of Cancer Cells to Ch...(y engaged in discovering and developing ...),Health

Date:10/12/2008

y engaged in discovering and developing novel therapeutic RNAi drug candidates. Quark has a fully integrated drug development platform that spans therapeutic target identification to drug development. Quark's RNAi technology includes novel siRNA structures and chemistry providing Quark with freedom to operate in the siRNA intellectual property arena, as well as the ability for non-invasive delivery of siRNA to target tissues including the eye, ear, kidney, lung, spinal cord and brain.

PF-4523655 (RTP801i-14), currently in Phase II clinical trials, is a synthetic, chemically modified, siRNA molecule to inhibit the expression of the gene RTP801 discovered by Quark through the gene discovery platform BiFAR. PF-4523655 is licensed to Pfizer. In addition, Quark's current clinical pipeline includes AKIi-5, developed by Quark for the prevention of acute kidney injury (AKI) following major cardiac surgery, currently in Phase I/IIa clinical trials via systemic delivery and DGFi, about to start phase I/II for prevention of delayed graft function in kidney transplantation. Based on publicly available information, Quark believes AKIi-5 was the first siRNA administered systemically in a human clinical study.

In addition, Quark has a broad pipeline of siRNA drug candidates based on novel structures developed internally. The Company expects to utilize the structures to develop additional RNAi drug candidates.

Quark is headquartered in Fremont, California and operates research and development facilities in Boulder, Colorado and Ness-Ziona, Israel. Additional information is available at http://www.quarkpharma.com

Quark Pharmaceuticals, Inc.

Juliana Friedman

+972 89 30 5111

jfriedman@quarkpharma.com

The Ruth Group (investors / media)

Sara Ephraim / Janine McCargo

(646) 536-7004 / 7033

SOURCE Quark Pharmaceuticals, Inc. Copyright©2008 PR Newswire. All rights reserved

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