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New TB vaccine enters clinical testing
Date:9/23/2010

Rockville, MD, USA and Tallinn, Estonia (September 23, 2010) At an international gathering of TB vaccine researchers in Tallinn today, the Aeras Global TB Vaccine Foundation announced it will initiate a clinical trial of an investigational live recombinant tuberculosis vaccine to be led by researchers at Saint Louis University in St. Louis, Missouri, USA. The announcement was made at the Second Global Forum on TB Vaccine Development.

Building on more than a decade of global scientific research, Aeras scientists have engineered a new investigational vaccine, called AERAS-422, which will undergo clinical trials to evaluate its properties for interrupting TB at all stages of infection, including initial infection, latency and reactivation.

"Moving our lead in-house vaccine from the laboratory into clinical testing is an important milestone for Aeras and its partners. Finding a potential replacement for the currently available TB vaccine, which was invented almost 90 years ago, is a primary goal in our mission," said Thomas G. Evans, MD, Aeras' Chief Scientific Officer. "Based on data from pre-clinical studies, we are cautiously optimistic about the potential of this vaccine candidate to be safer and more immunogenic than the currently available vaccine."

The new vaccine, called AERAS-422, is a modernized version of the currently used TB vaccine Bacille Calmette Gurin (BCG). BCG is widely viewed as insufficient in preventing pulmonary TB, and this trial is part of a wider global effort to develop safer and more immunogenic TB vaccines that would be effective against all forms of TB.

AERAS-422 has been modified with an endosome escape mechanism and over-expresses three key proteins: 85A, 85B and Rv3407. The bacterium that causes TB hides inside cells. Therefore, the endosome escape mechanism is designed so that the proteins will escape an internal compartment of the cell and be more efficiently presented to the immune s
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Contact: Annmarie Leadman
aleadman@aeras.org
240-599-3018
Aeras Global TB Vaccine Foundation
Source:Eurekalert

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