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Cocaine vaccine passes key testing hurdle
Date:5/10/2013

t of the dopamine transporter had to be occupied by cocaine in order to produce a drug high. The researchers found, in vaccinated primates, that cocaine occupancy of the dopamine receptor was reduced to levels of less than 20 percent.

"This is a direct demonstration in a large animal, using nuclear medicine technology, that we can reduce the amount of cocaine that reaches the brain sufficiently so that it is below the threshold by which you get the high," says Dr. Crystal.

When the vaccine is studied in humans, the non-toxic dopamine transporter tracer can be used to help study its effectiveness as well, he adds.

The researchers do not know how often the vaccine needs to be administered in humans to maintain its anti-cocaine effect. One vaccine lasted 13 weeks in mice and seven weeks in non-human primates.

"An anti-cocaine vaccination will require booster shots in humans, but we don't know yet how often these booster shots will be needed," says Dr. Crystal. "I believe that for those people who desperately want to break their addiction, a series of vaccinations will help."


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Contact: John Rodgers
jdr2001@med.cornell.edu
646-317-7401
Weill Cornell Medical College
Source:Eurekalert

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