title: Reduced peripheral brain-derived neurotrophic factor mRNA levels are normalized by antidepressant treatment.
abstract: Consistent data coming from biochemical studies have evidenced a brain-derived neurotrophic factor (BDNF) serum reduction in depressed patients compared to controls and a restoration following antidepressant treatment. However, to date, no study has evaluated whether BDNF synthesis in leukocytes could contribute to such modulation. Therefore, in this study, we analysed BDNF mRNA levels in leukocytes from 21 depressed patients prior to and during escitalopram treatment and from 23 control subjects showing that BDNF mRNA levels were decreased in drug-free depressed patients and that 12 wk escitalopram treatment was able to reverse this deficit. Interestingly, changes in BDNF mRNA levels paralleled BDNF serum increase during antidepressant treatment, and were correlated with symptoms improvement. Our results indicate that BDNF serum modulation observed in depressed patients is associated with BDNF synthesis alteration in leukocytes and suggest that these peripheral cells might play an active role in the mechanisms of action of antidepressants.
authors.affiliation: Genetics Unit, IRCCS San Giovanni di Dio, Fatebenefratelli, Brescia, Italy.
authors.forename: Annamaria
authors.initials: A
authors.lastname: Cattaneo
authors.forename: Luisella
authors.initials: L
authors.lastname: Bocchio-Chiavetto
authors.forename: Roberta
authors.initials: R
authors.lastname: Zanardini
authors.forename: Elena
authors.initials: E
authors.lastname: Milanesi
authors.forename: Anna
authors.initials: A
authors.lastname: Placentino
authors.forename: Massimo
authors.initials: M
authors.lastname: Gennarelli
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D019208:Brain-Derived Neurotrophic Factor / Q000097:blood* / Q000235:genetics; D015283:Citalopram / Q000494:pharmacology* / Q000627:therapeutic use; D003865:Major Depressive Disorder / Q000097:blood* / Q000188:drug therapy / Q000235:genetics*; D005260:Female; D015870:Gene Expression / Q000187:drug effects; D006801:Humans; D007962:Leukocytes / Q000187:drug effects* / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D012333:RNA, Messenger / Q000097:blood*; D017367:Selective Serotonin Reuptake Inhibitors / Q000494:pharmacology* / Q000627:therapeutic use; D016896:Treatment Outcome
chemical_list: D019208:Brain-Derived Neurotrophic Factor; D015283:Citalopram; D012333:RNA, Messenger; D017367:Selective Serotonin Reuptake Inhibitors