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This study was designed to assess whether 185 variants in 32 genes central to synaptic plasticity and signal transduction contribute to vulnerability to develop heroin and\/or cocaine addiction.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Analyses were conducted in a sample of 1860 subjects divided according to ancestry (African and European) and drug of abuse (heroin or cocaine).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Eighteen <jats:styled-content style=\"fixed-case\">SNP<\/jats:styled-content>s in 11 genes (<jats:italic><jats:styled-content style=\"fixed-case\">CDK<\/jats:styled-content>5R1<\/jats:italic>,<jats:italic> <jats:styled-content style=\"fixed-case\">EPHA<\/jats:styled-content>4<\/jats:italic>,<jats:italic> <jats:styled-content style=\"fixed-case\">EPHA<\/jats:styled-content>6<\/jats:italic>,<jats:italic> <jats:styled-content style=\"fixed-case\">FOSL<\/jats:styled-content>2<\/jats:italic>,<jats:italic> <jats:styled-content style=\"fixed-case\">MAPK<\/jats:styled-content>3<\/jats:italic>,<jats:italic> <jats:styled-content style=\"fixed-case\">MBP<\/jats:styled-content><\/jats:italic>,<jats:italic> <jats:styled-content style=\"fixed-case\">MPDZ<\/jats:styled-content><\/jats:italic>,<jats:italic> <jats:styled-content style=\"fixed-case\">NFKB<\/jats:styled-content>1<\/jats:italic>,<jats:italic> <jats:styled-content style=\"fixed-case\">NTRK<\/jats:styled-content>2<\/jats:italic>,<jats:italic> <jats:styled-content style=\"fixed-case\">NTSR<\/jats:styled-content>1<\/jats:italic>, and <jats:italic><jats:styled-content style=\"fixed-case\">PRKCE<\/jats:styled-content><\/jats:italic>) showed significant associations (<jats:italic>P<\/jats:italic> &lt; 0.01), but the signals did not survive correction for multiple testing. <jats:styled-content style=\"fixed-case\">SNP<\/jats:styled-content> rs230530 in the <jats:italic><jats:styled-content style=\"fixed-case\">NFKB<\/jats:styled-content>1<\/jats:italic> gene, encoding the transcription regulator <jats:styled-content style=\"fixed-case\">NF<\/jats:styled-content>\u2010kappa\u2010B, was the only <jats:styled-content style=\"fixed-case\">SNP<\/jats:styled-content> indicated in both ancestry groups and both addictions. This <jats:styled-content style=\"fixed-case\">SNP<\/jats:styled-content> was previously identified in association with alcohol addiction. <jats:styled-content style=\"fixed-case\">SNP<\/jats:styled-content> rs3915568 in <jats:italic><jats:styled-content style=\"fixed-case\">NTSR<\/jats:styled-content>1<\/jats:italic>, which encodes neurotensin receptor, and <jats:styled-content style=\"fixed-case\">SNP<\/jats:styled-content> rs1389752 in <jats:italic><jats:styled-content style=\"fixed-case\">MPDZ<\/jats:styled-content><\/jats:italic>, which encodes the multiple <jats:styled-content style=\"fixed-case\">PDZ<\/jats:styled-content> domain protein, were previously associated with heroin addiction or alcohol addiction, respectively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The study supports the involvement of genetic variation in signal transduction pathways in heroin and cocaine addiction and provides preliminary evidence suggesting several new risk or protective loci that may be relevant for diagnosis and treatment success.<\/jats:p><\/jats:sec>","DOI":"10.1111\/cns.12450","type":"journal-article","created":{"date-parts":[[2015,9,19]],"date-time":"2015-09-19T08:29:02Z","timestamp":1442651342000},"page":"898-904","source":"Crossref","is-referenced-by-count":26,"title":["Synaptic Plasticity and Signal Transduction Gene Polymorphisms and Vulnerability to Drug Addictions in Populations of European or African Ancestry"],"prefix":"10.1111","volume":"21","author":[{"given":"Orna","family":"Levran","sequence":"first","affiliation":[{"name":"The Laboratory of the Biology of Addictive Diseases The Rockefeller University New York NY USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Einat","family":"Peles","sequence":"additional","affiliation":[{"name":"Dr. Miriam and Sheldon G. 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