{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,24]],"date-time":"2026-10-24T11:18:48Z","timestamp":1792840728413,"version":"4.5.0"},"reference-count":47,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2020,6,23]],"date-time":"2020-06-23T00:00:00Z","timestamp":1592870400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004442","name":"National Science Centre, Poland","doi-asserted-by":"publisher","award":["UMO-2015\/19\/B\/NZ7\/03691."],"award-info":[{"award-number":["UMO-2015\/19\/B\/NZ7\/03691."]}],"id":[{"id":"10.13039\/501100004442","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Brain Sciences"],"abstract":"<jats:p>The susceptibility to cannabis dependency results from the influence of numerous factors such as social, genetic, as well as epigenetic factors. Many studies have attempted to discover a molecular basis for this disease. However, our study aimed at evaluating the connection between altered methylation of the dopamine transporter gene (DAT1) promoter CpG sites and cannabis dependency. In the cases of some DNA sequences, including the DAT1 gene region, their methylation status in blood cells may reflect a systemic modulation in the whole organism. Consequently, we isolated the DNA from the peripheral blood cells from a group of 201 cannabis-dependent patients and 285 controls who were healthy volunteers and who were matched for age and sex. The DNA was subjected to bisulfite conversion and sequencing. Our analysis revealed no statistical differences in the general methylation status of the DAT1 gene promoter CpG island between the patients and controls. Yet, the analysis of individual CpG sites where methylation occurred indicated significant differences. These sites are known to be bound by transcription factors (e.g., SP1, p53, PAX5, or GR), which, apart from other functions, were shown to play a role in the development of the nervous system. Therefore, DAT1 gene promoter methylation studies may provide important insight into the mechanism of cannabis dependency.<\/jats:p>","DOI":"10.3390\/brainsci10060400","type":"journal-article","created":{"date-parts":[[2020,6,24]],"date-time":"2020-06-24T07:14:19Z","timestamp":1592982859000},"page":"400","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Contribution of Dopamine Transporter Gene Methylation Status to Cannabis Dependency"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2633-520X","authenticated-orcid":false,"given":"Anna","family":"Grzywacz","sequence":"first","affiliation":[{"name":"Independent Laboratory of Health Promotion, the Pomeranian Medical University in Szczecin, 11 Chlapowskiego St., 70-204 Szczecin, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9603-2028","authenticated-orcid":false,"given":"Wojciech","family":"Barczak","sequence":"additional","affiliation":[{"name":"Department of Head and Neck Surgery, Poznan University of Medical Sciences, Fredry 10, 61-701 Poznan, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3285-5313","authenticated-orcid":false,"given":"Jolanta","family":"Chmielowiec","sequence":"additional","affiliation":[{"name":"Department of Hygiene and Epidemiology, Collegium Medicum, University of Zielona G\u00f3ra, Zyty 28 St., 65-046 Zielona Gora, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4254-5466","authenticated-orcid":false,"given":"Krzysztof","family":"Chmielowiec","sequence":"additional","affiliation":[{"name":"Department of Hygiene and Epidemiology, Collegium Medicum, University of Zielona G\u00f3ra, Zyty 28 St., 65-046 Zielona Gora, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7137-1429","authenticated-orcid":false,"given":"Aleksandra","family":"Suchanecka","sequence":"additional","affiliation":[{"name":"Independent Laboratory of Health Promotion, the Pomeranian Medical University in Szczecin, 11 Chlapowskiego St., 70-204 Szczecin, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3900-4901","authenticated-orcid":false,"given":"Grzegorz","family":"Trybek","sequence":"additional","affiliation":[{"name":"Department of Oral Surgery, Pomeranian Medical University in Szczecin, 72 Powsta\u0144c\u00f3w Wlkp. St., 70-111 Szczecin, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jolanta","family":"Masiak","sequence":"additional","affiliation":[{"name":"Neurophysiological Independent Unit, Department of Psychiatry, Medical University of Lublin, 20-093 Lublin, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7583-8965","authenticated-orcid":false,"given":"Pawe\u0142","family":"Jagielski","sequence":"additional","affiliation":[{"name":"Department of Nutrition and Drug Research, Faculty of Health Science, Jagiellonian University Medical College, Grzegorzecka 20, 31-501 Krakow, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1468-4664","authenticated-orcid":false,"given":"Katarzyna","family":"Grocholewicz","sequence":"additional","affiliation":[{"name":"Department of Interdisciplinary Dentistry, Pomeranian Medical University, 72 Powsta\u0144c\u00f3w Wlkp. 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