EX-99.1 3 a03-5673_1ex99d1.htm EX-99.1

Exhibit 99.1

 

Text of Press Release

 

Company Contacts:

AVI BioPharma, Inc.
Michael Hubbard (hubbard@avibio.com)
(503) 227-0554

 

Investor Contacts:

Lippert/Heilshorn & Associates, Inc.
Bruce Voss (bvoss@lhai.com)
Jody Cain (jcain@lhai.com)
(310) 691-7100

 

Press Contacts:

Waggener Edstrom Bioscience
Wendy Carhart (wendyc@wagged.com)
(503) 443-7000

 

 

For Release 6 a.m. PST
Nov. 17, 2003

 

AVI BioPharma Announces Publication of Prostate Cancer Results

 

NEUGENE Antisense Targets Are Effective in Two Preclinical Prostate Cancer Models

 

PORTLAND, Ore. — Nov. 17, 2003 — AVI BioPharma, Inc. (Nasdaq: AVII), today announced publication of two preclinical studies evaluating the potential of AVI’s NEUGENE® antisense compounds in prostate cancer models. Since target selection is of paramount importance in antisense drug development, these studies demonstrate AVI’s progress in validating prostate cancer targets. Results were published in the peer-reviewed journals Cancer Gene Therapy and Clinical Cancer Research.

 

“These two studies demonstrate AVI’s commitment to developing antisense drugs for the potential treatment of cancer,” said Patrick L. Iversen, senior vice president of research and development at AVI. “We are encouraged by these data and intend to pursue these targets for potential clinical development.”

 

Results from the first study, conducted in collaboration with Oregon Health & Science University, demonstrated that a NEUGENE antisense agent inhibited cell growth, tumor vascularization and metastasis of human prostate cancer cells grafted into mice. The article, published in the November 2003 issue of Cancer Gene Therapy, is titled “A novel antisense inhibitor of MMP-9 attenuates angiogenesis, human prostate cancer cell invasion and tumorigenicity.” This paper was authored by AVI BioPharma senior scientist Gayathri R. Devi, Ph.D.

 

 

By targeting an enzyme, called MMP-9, which is associated with aggressive tumor growth in prostate cancer patients, AVI’s antisense drug produced a significant inhibition of tumor invasion and angiogenesis. In addition, antisense to MMP-9 decreased tumor growth with tumor regression observed in a significant number of the treated animals. No apparent toxicity or mortality was associated with this NEUGENE antisense treatment. The data establish the feasibility of developing a nontoxic antisense drug for inhibiting invasion and metastasis of prostate cancer.

 

The second study, titled “Androgen receptor down-regulation in prostate cancer with phosphorodiamidate morpholino antisense oligomers,” was authored by collaborators at Boston’s Beth Israel Deaconess Medical Center and AVI scientists. It was published in the Nov. 15, 2003, publication of Clinical Cancer Research and also will be presented at the AACR-NCI-EORTC International Conference on Molecular Targets and Cancer Therapeutics, to be held in Boston, Nov. 17–21, 2003. The conference is sponsored by the American Association for Cancer Research, the National Cancer Institute and the European Organization for Research and Treatment of Cancer.

 

The results of this study demonstrate the effectiveness of AVI’s novel antisense compound AVI-4451 against human prostate cancer in animal models by targeting the androgen receptor (AR). AR plays a pivotal role in the growth and proliferation of prostate cancer. Analysis of tissue distribution of AVI-4451 showed significant drug levels in both the mouse prostate and in tumor tissue.

 

AVI-4451 specifically down-regulated AR levels in both cell culture and animal tumor models. This correlated with a reduction in prostate specific antigen (PSA) following administration of the antisense drug. PSA is a widely used marker of tumor progression in patients with prostate cancer. These studies are supported in part by a National Institute of Health FLAIR grant.

 

Prostate cancer is the most common type of cancer found in American men, other than skin cancer. The American Cancer Society estimates that there will be about 220,900 new cases of prostate cancer in the United States in the year 2003. About 28,900 men will die of this disease. Prostate cancer is the second leading cause of cancer death in men, exceeded only by lung cancer.

 

About AVI BioPharma

AVI BioPharma develops therapeutic products for the treatment of life-threatening diseases using two technology platforms: third-generation NEUGENE antisense drugs and cancer immunotherapy. AVI’s lead NEUGENE antisense compound is designed to target cell proliferation disorders, including cardiovascular restenosis, cancer, and polycystic kidney disease. In addition to targeting specific genes in the body, AVI’s antiviral program uses NEUGENE antisense compounds to target single-stranded RNA viruses, including West Nile virus, SARS coronavirus, calicivirus and hepatitis C. AVI’s second technology, AVICINE®, is a therapeutic cancer vaccine with late-stage trials planned for the treatment of pancreatic cancer. More information about AVI is available on the company’s Web site at http://www.avibio.com/.

 

 

“Safe Harbor” Statement under the Private Securities Litigation Reform Act of 1995: The statements that are not historical facts contained in this release are forward-looking

 

 

statements that involve risks and uncertainties, including, but not limited to, the results of research and development efforts, the results of preclinical and clinical testing, the effect of regulation by the FDA and other agencies, the impact of competitive products, product development, commercialization and technological difficulties, and other risks detailed in the company’s Securities and Exchange Commission filings.