GABRIEL TORTELLA DE SOUZA

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  • article 47 Citação(ões) na Scopus
    Cognitive effects of transcranial direct current stimulation in depression: Results from the SELECT-TDCS trial and insights for further clinical trials
    (2016) BRUNONI, Andre Russowsky; TORTELLA, Gabriel; BENSENOR, Isabela Martins; LOTUFO, Paulo Andrade; CARVALHO, Andre Ferrer; FREGNI, Felipe
    Background: Cognitive dysfunction treatment remains an unmet clinical need in major depressive disorder (MDD). Transcranial direct current stimulation (tDCS) may improve cognitive symptoms in MDD. Our aim was to investigate the cognitive effects of tDCS in the Sertraline vs. Electric Current Therapy for Treating Depression Clinical Study (SELECT-TDCS). We also explored whether tDCS could have mood independent cognitive effects. Methods: One hundred twenty MDD patients aged from 18 to 65 years received 12 sessions of active/sham tDCS (2 mA for 30 min) and real/placebo 50 mg/d sertraline over 6 weeks in a factorial trial. We analyzed whether changes in performance of neuropsychological tests (Trail Making, Digit Span, Stroop Task, Mini-Mental Status Exam and Montreal Cognitive Assessment) occurred over time, according to treatment group and depression improvement. Exploratory analyses were carried out to verify the influence of clinical and demographic variables on the outcomes. Results: Cognitive improvement was showed in most tests used, although they occurred regardless of intervention type and depression improvement. Further exploratory analyses revealed that clinical response and education level could have mediated pro-cognitive tDCS effects on some of the tests used. Limitations: The neuropsychological battery used might not have been sensitive to detect tDCS-induced effects on cognition. Lack of simultaneous cognitive training during application may have also limited its cognitive effects. Conclusions: We found no evidence of beneficial or deleterious cognitive effects of tDCS as a treatment for depression. We discussed clinical trial design considerations for further tDCS studies assessing cognitive effects, including sample and outcomes considerations.
  • article 5 Citação(ões) na Scopus
    Cognitive outcomes of the bipolar depression electrical treatment trial (BETTER): a randomized, double-blind, sham-controlled study
    (2021) TORTELLA, Gabriel; SAMPAIO-JUNIOR, Bernardo; MORENO, Marina L.; MOFFA, Adriano H.; SILVA, Adriano Fernandes da; LAFER, Beny; LOTUFO, Paulo Andrade; GATTAZ, Wagner; BORRIONE, Lucas; MACHADO-VIEIRA, Rodrigo; GOERIGK, Stephan; BENSENOR, Isabela M.; BRUNONI, Andre R.
    Bipolar depression is associated with marked cognitive deficits. Pharmacological treatments for this condition are limited and may aggravate depressive and cognitive symptoms. Therefore, therapeutic interventions that preserve adequate cognitive functioning are necessary. Our previous results demonstrated significant clinical efficacy of transcranial direct current stimulation (tDCS) in the Bipolar Depression Electrical Treatment Trial (BETTER). Here, cognitive outcomes of this study are reported. We randomized 59 patients with bipolar disorder I or II in an acute depressive episode to receive active (12 2 mA, 30-min, anodal-left, cathodal-right prefrontal cortex tDCS sessions) or sham tDCS. Patients were on stable pharmacological regimen for at least 2 weeks. A battery of 12 neuropsychological assessments in five cognitive domains (attention and processing speed, memory, language, inhibitory control, and working memory and executive function) was performed at baseline, after two weeks and at endpoint (week 6). No significant differences between groups over 6 weeks of treatment were observed for any cognitive outcomes. Moreover, no decrease in cognitive performance was observed. Our findings warrant further replication in larger studies. Trial Registration: clinicaltrials.gov Identifier: NCT02152878
  • article 0 Citação(ões) na Scopus
    Transcranial direct current stimulation in psychiatric disorders
    (2015) TORTELLA, Gabriel; CASATI, Roberta; APARICIO, Luana V. M.; MANTOVANI, Antonio; SENCO, Natasha; D'URSO, Giordano; BRUNELIN, Jerome; GUARIENTI, Fabiana; SELINGARDI, Priscila Mara Lorencini; MUSZKAT, Debora; PEREIRA JUNIOR, Bernardo de Sampaio; VALIENGO, Leandro; MOFFA, Adriano H.; SIMIS, Marcel; BORRIONE, Lucas; BRUNONI, Andre R.
    The interest in non-invasive brain stimulation techniques is increasing in recent years. Among these techniques, transcranial direct current stimulation (tDCS) has been the subject of great interest among researchers because of its easiness to use, low cost, benign profile of side effects and encouraging results of research in the field. This interest has generated several studies and randomized clinical trials, particularly in psychiatry. In this review, we provide a summary of the development of the technique and its mechanism of action as well as a review of the methodological aspects of randomized clinical trials in psychiatry, including studies in affective disorders, schizophrenia, obsessive compulsive disorder, child psychiatry and substance use disorder. Finally, we provide an overview of tDCS use in cognitive enhancement as well as a discussion regarding its clinical use and regulatory and ethical issues. Although many promising results regarding tDCS efficacy were described, the total number of studies is still low, highlighting the need of further studies aiming to replicate these findings in larger samples as to provide a definite picture regarding tDCS efficacy in psychiatry.