Genetic key to cocaine addiction: study

Hope?

in reference to:

"US scientists have found a key mechanism in the brain that helps explain why cocaine is so addictive and could pave the way towards a potential cure, a study showed Thursday.Researchers revealed how the highly-addictive drug brings on changes in the brain through a process which influences the expression of genes without changing the brain's gene sequence.These changes in the brain's pleasure circuits, which are also the first to be influenced by chronic cocaine exposure, appear to promote cravings for cocaine, said the study published in Science."
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