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Proteon Therapeutics to Present at Annual Meeting of American Society of Nephrology in San Francisco on November 2, 2007

WALTHAM, Mass., November 01, 2007 /PRNewswire/ -- Proteon Therapeutics (http://www.proteontherapeutics.com), a privately held biopharmaceutical company developing novel, first-in-class pharmaceuticals to address the medical needs of patients with kidney and vascular diseases, is presenting tomorrow at the Annual Meeting of the American Society of Nephrology an abstract entitled "Recombinant Human Elastase (PRT-201) Dilates Outflow Veins in a Preclinical Model of Arteriovenous Fistula." Findings to be presented represent an important preclinical demonstration of the potential of PRT-201 to enhance arteriovenous fistula (AVF) surgery outcomes in patients requiring chronic hemodialysis. It is well documented that between 30 and 50 percent of AVFs, the preferred form of vascular access, fail to mature to usable access sites for dialysis patients.

"Vascular access related complications are a major cause of suffering and hospitalization for dialysis patients," said Timothy P. Noyes, the Company's President and CEO. "We believe that PRT-201 could potentially facilitate the creation of more reliable dialysis access sites."

About Vascular Access in Hemodialysis

Patients with end stage kidney disease must undergo periodic external blood filtering by hemodialysis machines in order to remove fluid and metabolic byproducts from their blood. Vascular surgeons prepare patients for hemodialysis by creating access sites in the body that can be connected to hemodialysis machines. These high flow access sites are usually created by connecting an artery to a vein, resulting in a "shunt" of blood from the artery to the vein. There are three main types of chronic hemodialysis access sites: Arteriovenous fistulas are created by connecting veins directly to arteries, arteriovenous grafts are created by connecting veins to arteries with a segment of artificial tubing, and catheters are placed directly in large veins in the neck or chest. These access sites are often difficult to create and prone to failure, resulting in treatment interruptions, hospitalizations, painful corrective surgical procedures, and premature death.

About Proteon Therapeutics

Proteon Therapeutics, Inc. is a privately held biopharmaceutical company developing novel, first-in-class pharmaceuticals to address the critical, rapidly expanding medical needs of patients with kidney and vascular diseases. The company is leveraging a unique understanding of tissue remodeling to develop a pipeline of proprietary pharmaceuticals. The company is headquartered in Waltham, MA, and has research facilities in Kansas City, MO. For additional information please visit http://www.proteontherapeutics.com.

CONTACT: Timothy Noyes, President and CEO of Proteon Therapeutics,+1-781-890-0102, ; or Steve Walker ofFleishman-Hillard, +1-816-512-2270, , for ProteonTherapeutics tnoyes@proteontherapeutics.com steve.walker@fleishman.com

Web site: http://www.proteontherapeutics.com/

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Posted: November 2007

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