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TheTrueCentrist
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nature.com/news/2011/111102/full/news.2011.627.html?s=news_rss
…Kandel has collaborated with her husband of 56 years, neurobiologist Eric Kandel, and other colleagues at Columbia, to probe the molecular biology underlying the gateway effect. In a study published today in Science Translational Medicine2, the team shows that, in mice at least, nicotine causes epigenetic changes — long-lasting changes in the control of gene expression — that subsequently boost the response to cocaine.
Nicotine causes changes in gene regulation that enhance the brain’s subsequent response to cocaine. The finding, in mice, provides the first clear evidence for a molecular mechanism supporting the idea of ‘gateway drugs’.