A cure for cocaine addiction?

Ian Sample reports in The Guardian,

A cure for cocaine addiction may be in reach, say scientists.
Gene therapists have developed a stem cell implant that could help overcome addiction and prevent overdoses.

...Though more work is needed before the cocaine-blocking therapy can be trialled in humans, Xu believes the approach has the potential to make drug users immune to cocaine and protect them from fatal overdoses. The team is working on similar genetically-engineered cells to treat alcohol and nicotine addiction, and soon expect to start research on a therapy for opioid addiction, Xu said.

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