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  • Title: High levels of brain-derived neurotrophic factor are associated with treatment adherence among crack-cocaine users.
    Author: Scherer JN, Schuch S, Ornell F, Sordi AO, Bristot G, Pfaffenseller B, Kapczinski F, Kessler FHP, Fumagalli F, Pechansky F, von Diemen L.
    Journal: Neurosci Lett; 2016 Sep 06; 630():169-175. PubMed ID: 27473943.
    Abstract:
    Due to the complexity of crack -cocaine addiction treatment, the identification of biological markers that could help determining the impact or outcome of drug use has become a major subject of study. Therefore, we aim to evaluate the association of Brain-Derived Neurotrophic Factor (BDNF) and Thiobarbituric Acid Reactive Substances (TBARS) levels in crack -cocaine users with treatment adherence and with drug addiction severity. A sample of 47 male inpatient crack- cocaine users were recruited in a treatment unit, and blood samples were collected at admission and discharge in order to measure BDNF and TBARS serum levels. Subjects were split into 2 groups: treatment non-completers (n=23) and treatment completers (n=24). The completer group had a tendency of higher levels of BDNF than non-completers at admission (16.85±3.24 vs. 14.65±5.45, p=0.10), and significant higher levels at discharge (18.10±4.88 vs. 13.91±4.77, p=0.001). A negative correlation between BDNF levels at admission and years of crack use was observed. We did not find significant changes in TBARS levels during inpatient treatment, although the completer group tended to decrease these levels while non-completers tend to increase it. These findings suggest an association between higher levels of BDNF and better clinical outcomes in crack- cocaine users after detoxification. We believe that the variation in BDNF and TBARS found here add evidence to literature data that propose that such biomarkers could be used to better understand the physiopathology of crack- cocaine addiction.
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