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Nuvelo Announces Positive Phase 1b Proof-of-Concept Data With Anticoagulant NU172
Date:8/14/2008

e (aPTT). The highest infusion dose rate tested, 6.0 mg/kg/hr, resulted in an average ACT per subject ranging from 373 to 414 seconds and an increase of approximately three times baseline. Average PT values per subject ranged from 56 to 92 seconds and had an increase of approximately five times baseline. Average aPTT values per subject ranged from 130 to 178 seconds and had an increase of approximately five times baseline. All measurements were maintained stably throughout the four-hour infusion. Once the infusion ended, the ACT and other coagulation parameters showed a rapid return toward baseline, consistent with the short plasma half-life of NU172 observed in the Phase 1a trial. In addition, NU172 was well-tolerated with no serious adverse events.

"In this study, we were able to identify a dose that meets or exceeds the level of anticoagulation needed for the indications we plan to evaluate, including CABG surgery," said Dr. Ted W. Love, chairman and chief executive officer of Nuvelo. "In addition to supporting our previous proof-of-concept data, the Phase 1b study shows that anticoagulation with NU172 can be maintained for four hours, which is longer than a typical CABG procedure. We are on track to launch a Phase 2 study evaluating NU172 in the fourth quarter of 2008 or the first quarter of 2009."

Approximately 450,000 CABG procedures, 50 million dialysis procedures, and 1.2 million PCIs are performed annually in the U.S. During these procedures, anticoagulants are given to prevent blood clotting. In CABG procedures and often in dialysis, the anticoagulation effect of heparin must be reversed with protamine once the procedure has been completed.

About Aptamers and NU172

Aptamers are chemically synthesized single-stranded nucleic acids that form well-defined three-dimensional shapes, allowing them to bind target molecules in a manner that is conceptually similar to antibodies. Characteristics of aptamers include high specificity and a
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SOURCE Nuvelo, Inc.
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