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Peptimmune Presentations at Upcoming Events

October 28, 2008

CAMBRIDGE, Mass., Oct. 28 /PRNewswire/ — Peptimmune, Inc., a privately held biotechnology company, announced today that President & CEO Thomas P. Mathers will provide an update on the Company’s current phase Ib clinical trial for PI-2301 in multiple sclerosis patients at the three upcoming events:

   1. BIO Investor Forum 2008. The presentation will take place on Wednesday,      October 29th, at 3:15 p.m. in the Pacific Room at the Palace Hotel in      San Francisco.   2. Oppenheimer 19th Annual Healthcare Conference. The presentation will      take place on Tuesday, November 4th, at 10:40 a.m. in the Louis XVI      Room at the Waldorf-Astoria Hotel in New York City.   3. Rodman & Renshaw 10th Annual Healthcare Conference. The presentation      will take place on Wednesday, November 12th, at 2:25 p.m. in the Adams      Room at the New York Palace Hotel in New York City.    

PI-2301 is currently in a Phase Ib multiple-ascending dose, double-blind, placebo-controlled randomized study in subjects with multiple sclerosis. Following establishment of safety at potentially therapeutic doses and proof of pharmacologic mechanism, the Company plans to initiate its Phase II study in relapsing remitting multiple sclerosis patients in early 2009.

PI-2301 is a second-generation peptide copolymer from a similar compound class as Copaxone(R) (Teva Pharmaceuticals). PI-2301 has been designed to be more efficacious and more convenient (weekly versus daily dosing) than Copaxone for the treatment of multiple sclerosis. PI-2301 works through immune modulation by enhancing the regulatory response of the immune system and thereby controlling the pathogenic autoimmune response observed in some diseases. In a Phase I single ascending dose, double blind placebo controlled randomized study, all doses of PI-2301 were safe and well tolerated, and no serious adverse events were observed. Pharmacodynamic assays demonstrated evidence of immune exposure consistent with the pharmacologic mechanism of action for PI-2301, and dose-dependent pharmacokinetics was observed.

PI-2301 has been optimized using Peptimmune’s novel platform peptide chemistry and, in preclinical studies, has shown to be more potent and effective than Copaxone in treating disease models for multiple sclerosis. PI-2301 has also shown efficacy in preclinical models of autoimmune diseases where immune modulation may be effective, such as Crohn’s disease, rheumatoid arthritis, and autoimmune uveitis. Peptimmune has put in place high-quality synthesis and analytical methods that provide a superior level of batch-to-batch reproducibility in the manufacturing of PI-2301.

Over 400,000 Americans have multiple sclerosis (MS), and MS may affect over 2.5 million individuals worldwide. MS is an autoimmune disease in which the individuals’ immune system responds against multiple components of nerve-insulating myelin. The effects of these immune-mediated attacks can range from relatively benign to somewhat disabling to devastating, as communication between the brain and other parts of the body is disrupted.

About Peptimmune

Peptimmune, Inc. is a privately held clinical stage biotechnology company focused on the development of peptide therapies to improve the management of chronic autoimmune and inflammatory disorders. The Company is in clinical development with second-generation therapeutics that are expected to result in safer and more effective products for multiple sclerosis and pemphigus vulgaris. Current investors include New Enterprise Associates, MPM Capital, Hunt Ventures, Boston Medical Investors, Silicon Valley Bank Capital, and Genzyme Corporation.

Peptimmune, Inc.

CONTACT: Tom Mathers of Peptimmune, Inc., +1-617-715-8000,tom.mathers@peptimmune.com

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




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