PORTLAND, OR--(Marketwire - May 20, 2008) - AVI BioPharma, Inc. (NASDAQ: AVII) today announced that Patrick Iversen, Ph.D., AVI’s Senior Vice President of Strategic Alliances, is presenting at the TIDES Oligonucleotide and Peptide Technology and Product Development meeting in Las Vegas on Tuesday, May 20, 2008. The title of his presentation is “Manipulating the Immune Response with Cell Penetrating Peptide Conjugated Phosphorodiamidate Morpholino Oligomers” and is to feature the targeting of genes, such as interleukin-10 (IL-10), involved in the host immune response, with AVI’s proprietary Phosphorodiamidate Morpholino Oligomers and arginine-rich peptides. IL-10 is considered a key regulator of immune response to infection from viruses, bacteria and other organisms.