10.6084/m9.figshare.5788839.v1 Glahn A. Glahn A. Rhein M. Rhein M. Frieling H. Frieling H. Schuster R. Schuster R. ElĀ Aissami A. El Aissami A. Bleich S. Bleich S. Hillemacher T. Hillemacher T. Muschler M. Muschler M. Supplementary Material for: Smoking and Promoter-Specific Deoxyribonucleic Acid Methylation of the Atrial Natriuretic Peptide Gene: Methylation of Smokers and Non-Smokers Differs Significantly during Withdrawal Karger Publishers 2018 Tobacco dependence Withdrawal Atrial natriuretic peptide Epigenetic regulation 2018-01-16 08:34:23 Dataset https://karger.figshare.com/articles/dataset/Supplementary_Material_for_Smoking_and_Promoter-Specific_Deoxyribonucleic_Acid_Methylation_of_the_Atrial_Natriuretic_Peptide_Gene_Methylation_of_Smokers_and_Non-Smokers_Differs_Significantly_during_Withdrawal/5788839 <b><i>Background:</i></b> Atrial natriuretic peptide (ANP) is well known in psychiatric disorders to modulate hypothalamic-pituitary-adrenal axis activity. Disturbances of ANP have been described in early abstinent alcohol-dependent patients. This is the first longitudinal investigation on cytosine-phosphatidyl-guanine (CpG)-island promoter methylation of the <i>ANP</i> gene in the blood of tobacco-dependent patients. <b><i>Methods:</i></b> In a longitudinal approach, we investigated whether changes in ANP serum levels correlated to CpG methylation of the respective gene promoters on days 1, 7, and 14 of tobacco withdrawal. <b><i>Results</i></b> <b><i>and Conclusion:</i></b> Compared to non-smokers, promoter-related deoxyribonucleic acid methylation of the ANP promoter was significantly elevated on days 7 and 14 of withdrawal in tobacco-dependent patients. Baseline methylation status of the ANP promoter was not significantly different from controls, arguing for an impaired regulation during withdrawal.