Peptimmune Presents Early Clinical Data at European Neurological Society and Federation of Clinical Immunology Societie...( CAMBRIDGE Mass. June 9 /- Peptimm...),Health

CAMBRIDGE, Mass., June 9 /PRNewswire/ -- Peptimmune, Inc., a privately held biotechnology company, presented early clinical results from its PI-2301 peptide copolymer program at both the 17th Annual ENS meeting in Nice, France and at FOCIS 2008 in Boston, MA. The Company presented data from its Phase Ia Single-Ascending-Dose, first-in-man study involving healthy, male adult volunteers following SC administration of the second-generation peptide copolymer PI-2301. This study demonstrated that all doses were safe and well tolerated, and demonstrated early immunological effects of PI-2301 consistent with its pharmacologic mechanism of action.

The Phase I single-ascending dose, double-blind placebo, controlled-randomized study involved fifty-six healthy volunteers who received the drug in eight escalating dose cohorts. All doses were safe and well tolerated (0.035 - 60mg), and there were no serious adverse events. Pharmacodynamic assays demonstrated evidence of immune exposure (tritium uptake, IL-13 in recall responses) consistent with the pharmacologic mechanism of action for PI-2301, and dose-related pharmacokinetics were observed (proprietary antibody-based assay). The Company plans to initiate its first repeat-dose study in multiple sclerosis patients in Q2/2008.

Peptimmune also presented data that details significant differences in the bioavailability, mechanism of action, and pharmacodynamic effects between PI-2301 and Copaxone(R) (Teva Pharmaceuticals). The Company demonstrated four-fold greater bioavailabilty of PI-2301 than Copaxone, and a significantly greater regulatory immune response than Copaxone. Both presentations are available on Peptimmune's Web site at http://www.peptimmune.com/research_development/publications.

"We are pleased to see that PI-2301 was well tolerated and that this trial has provided evidence of PI-2301's immunomodulatory
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