RT Journal Article SR Electronic T1 Structural Chromatin Alterations in Peripheral Blood Leukocytes of Alcohol-dependent Individuals During Detoxification Therapy JF In Vivo JO In Vivo FD International Institute of Anticancer Research SP 529 OP 539 VO 28 IS 4 A1 MARGARITA CHRYSANTHOU PITEROU A1 ISMINI KLOUKINA PANTAZIDOU A1 SOPHIA HAVAKI A1 JOHN LIAPPAS A1 MARIETTA ISSIDORIDES RADOVITCH YR 2014 UL http://iv.iiarjournals.org/content/28/4/529.abstract AB Background/Aim: The aim of this study was to investigate the state of chromatin condensation in peripheral blood leukocytes of alcoholics, during the early detoxification period, in order to highlight structural modifications, indicating epigenetic mechanisms regulated by alcohol. Materials and Methods: Blood samples were obtained from alcoholic patients, who were admitted for detoxification on an inpatient basis, and from healthy controls. The level of condensed heterochromatin and de-condensed euchromatin were detected through the ratio of lysine to arginine residues, by the application of the ammoniacal silver reaction (ASR) staining on leukocyte pellets, and through immunohistochemical localization of histone H1 on peripheral blood smears. Results: Lymphocytes and neutrophils with relaxed de-condensed chromatin were found, indicating a more reactive genome in alcoholics, even at the stage of detoxification. Conclusion: The results underline the importance of chromatin structure of leukocytes as a sensitive, peripheral, biological marker for epigenetic studies in living chronic alcoholics.