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Inovio Pharmaceuticals Reports Long-Term Immune Responses from Therapeutic Cervical Dysplasia and Cancer DNA Vaccine
Date:5/9/2011

BLUE BELL, Pa., May 9, 2011 /PRNewswire/ -- Inovio Pharmaceuticals, Inc. (NYSE Amex: INO), a leader in the development of therapeutic and preventive vaccines against cancers and infectious diseases, has reported data demonstrating long-term durability of immune responses induced by VGX-3100, its investigational DNA vaccine for treating cervical dysplasia and cancer caused by human papillomavirus (HPV). These results were presented at the 15th Annual Conference on Women's Health Care Issues, hosted in New York by the International Infectious Disease Society for Obstetrics and Gynecology-USA, by Mark Bagarazzi, MD, Inovio's chief medical officer.

The data were generated through a long-term assessment of participants in Inovio's Phase I study of 18 adult females with moderate or severe cervical intraepithelial neoplasia (CIN 2/3), a high-grade premalignant lesion that may lead to cervical cancer. This study was designed to assess immune responses generated by and safety of the vaccine.

In this study, 72% of vaccinated subjects (13 of 18) developed significant antigen-specific T-cell responses during the first four months of treatment (each patient was vaccinated at months 0, 1, and 3) by standardized interferon-γ ELISpot assay. The third and highest dose group displayed the strongest level of T cell responses, with 83% (5 of 6) positive responders. The level of T cell responses in positive responders ranged from 100 to over 5000 spot forming units (SFU) per million cells when measured after overnight stimulation in the standardized ELISpot assay. In contrast, competing vaccine approaches targeting HPV therapy have consistently shown sub-100 SFU levels even when using more sensitive assays.

This newly reported data evaluated 11 of 13 pos
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SOURCE Inovio Pharmaceuticals, Inc.
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