- ICH GCP
- Registro degli studi clinici negli Stati Uniti
- Sperimentazione clinica NCT02683902
The Effect of Hypocaloric Diet Associated With tDCS on Weight Loss and Metabolic Profile
The Effect of Hypocaloric Diet Associated With tDCS on Weight Loss and Metabolic Profile: a Pilot, Double Blind, Randomized, Placebo-controlled Study
Panoramica dello studio
Stato
Condizioni
Intervento / Trattamento
Descrizione dettagliata
In order to assess whether tDCS treatment associated with a reduced caloric diet can improve weight loss, overweight or obese subjects will be recruited by advertisement on the web page of Porto Alegre Clinical Hospital, local newspaper and television, or referred by a doctor or nutritionist, from external to HCPA services. After screening and selection, patients will undergo a clinical, laboratory and nutritional evaluation. There will be a standard assessment protocol that includes: a complete clinical evaluation and socioeconomic status, assessment of physical activity, questionnaires of quality of life, sleep, depression and anxiety and body composition assessment.
In the laboratory evaluation the biochemistry exams include an oral glucose tolerance test (OGGT 75g), a meal tolerance test (MTT), serum glucose, Cholesterol, HDL-cholesterol, triglycerides, glycated hemoglobin and glycated albumin. The resting metabolic rate will be determine by indirect calorimetry. Besides, a 100-mm visual-analog scales will be used to measure a self-reported ratings of appetite, hunger, satiety and food craving.
Patients will also be prescribed a low caloric diet and individual counseling from a dietician in order to reduce 3% of their initial weight over 4-week treatment. Moreover, they will do one tDCS session a day (active or sham stimulation as previous randomization) for 5 consecutive days, during these four weeks of treatment (20 sessions).
Transcranial direct current stimulation (tDCS) is a non-invasive method of brain stimulation in which a small current is applied to the scalp. This technique uses a weak safety current of 2 milliampere (mA) for 20 minutes which may increase (anodal tDCS) or decrease (cathodal tDCS) cortical excitability.
During all of tDCS sessions, a film with images of food that usually elicit craving will be presented and after the end of each session, visual analog scales will be applied to assess hunger, satiety and presence of food craving. Finally, attention and mood scales will be applied periodically in addition to a questionnaire of adverse effects and use of tDCS.
At the end of the 4-week diet and tDCS, all patients will be submitted to the same clinical, laboratory, nutrition and feeding behavior exams applied at baseline.
Finally, participants should come in 3 and 6 months after the end of the protocol for reassessment weight, body composition by bioelectrical impedance and answer questionnaires.
An interim analysis will be performed when 12 patients will be included.
Tipo di studio
Iscrizione (Anticipato)
Fase
- Non applicabile
Contatti e Sedi
Luoghi di studio
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Rio Grande Do Sul
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Porto Alegre, Rio Grande Do Sul, Brasile
- Reclutamento
- Hospital de Clínicas de Porto Alegre
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Contatto:
- Fernando Gerchman, MD
- Numero di telefono: +55 51 33598127
- Email: fgerchman@gmail.com
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Contatto:
- Carina de Araujo, RND
- Numero di telefono: +55 51 33598127
- Email: carinanutr@hotmail.com
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Descrizione
Inclusion Criteria:
- Women of childbearing potential who are using medically approved birth control methods (eg hormonal contraceptives, intra uterine device (IUDs), barrier contraception) and who agree to use the same methods of contraception throughout the course of the study.
- BMI 25 ≥ 35 Kg/m2 at screening
- Stable weight for at least 12 weeks prior to screening
- Able and willing to provide written informed consent and to comply with the requirements of the study protocol
Exclusion Criteria:
- Pregnant or intend to become pregnant during the study period or who are currently breastfeeding.
- Women in perimenopause / menopause, or postmenopausal status, or who have had early menopause (under 40 years) or have had a hysterectomy or oophorectomy.
Diagnosis or history of diabetes Mellitus type 1, diabetes resulting from pancreatic injury or secondary forms of diabetes, such as, for example, Cushing's syndrome and acromegaly.
3.1. Metabolic and acute complications of diabetes such as ketoacidosis and hyperosmolar coma within the past six months.
- Gastrointestinal disease clinically symptomatic including, among others, inflammatory bowel disease and/or malabsorption diseases.
- Have received nutritional counseling in the last six months by a nutritionist.
- History of severe depression or other serious psychiatric comorbidities.
- History of gastric bypass, antrectomy or small bowel resection.
- History of chronic pancreatitis or idiopathic acute pancreatitis
- Myocardial infarction (MI), coronary arteries bypass surgery, post-transplant cardiomyopathy or stroke in the last 6 months
- Any abnormality in clinical laboratory tests which might prevent safe participation in the study
- Diagnosed and / or treated tumor (except basal cell skin cancer, carcinoma in situ of the cervix or prostate cancer in situ) in the last five years.
- History of known hemoglobinopathy and chronic anemia.
- Donation of one unit (500 ml) of blood or more, significant blood loss equivalent to at least one unit of blood within the last 2 weeks or blood transfusion in the past 8 weeks.
- Treatment with any oral antidiabetic drugs and / or herbal preparations or medications that do not require a prescription and can affect glycemic control within 12 weeks prior to screening.
- Chronic treatment with oral or parenteral corticosteroids (> 7 consecutive days of treatment) within 4 weeks prior to screening.
- Treatment with weight loss agents (e.g., orlistat, sibutramine, topiramate, bupropion) in the last 12 weeks prior to screening.
- Treatment with mineral oil or fiber supplementation (e.g., Benefiber, Metamucil, among others).
- Treatment with lipid-lowering drugs which have not been kept on a stable dose for the past 8 weeks before screening.
- Treatment with thyroid replacement hormones which has not been kept on a stable dose for the past 12 weeks prior to screening.
- Use of drugs under investigation within 30 days or 5 half-lives (whichever is longer) before screening unless the guidelines of local health authorities require a longer period.
Any of the following laboratory abnormalities identified in the screening by history and / or tests brought by the patient or that are part of this protocol, as described in section 4.3.4.6 of this project:
21.1. Alanine aminotransferase (ALT) and / or Aspartate aminotransferase (AST) > 3 times the upper limit of normal 21.2. Glomerular filtration rate estimated by Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation ≤ 30 ml per min per 1,73 m2 21.3. Thyroid stimulating hormone (TSH) outside the normal range 21.4. Fasting triglycerides ≥ 400 mg / dL. 21.5. History of active substance abuse (including alcohol) within the past year
Any condition or concomitant medical disorder, not provided for in other items which in the opinion of the investigator, probably:
22.1. Interfere with the patient's ability to complete the entire study period or participate in all activities of the study 22.2. Require during the study, administration of a treatment that may affect the interpretation of efficacy and safety data
- Patients potentially unreliable and those considered by the investigator as unsuitable for the study
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Trattamento
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Triplicare
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
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Comparatore attivo: Active tDCS + Diet
The participants will receive active tDCS treatment every day for 5 days per week, a total of 20 sessions.
They will also be prescribed a hypocaloric dietary during these 4-week treatment.
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The anode electrode will be placed over F4 position and the cathode electrode over F3, right and left respectively (using EEG 10/20 system).
The electric current will be ramped up until it reaches 2 milliampere (mA), and subjects will be stimulated for 20 min.
Altri nomi:
A hypocaloric dietary prescription and individual counseling from a dietician in order to reduce 3% of their initial weight over 4-week treatment.
Altri nomi:
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Comparatore fittizio: Sham tDCS + Diet
The participants will receive sham tDCS treatment every day for 5 days per week, a total of 20 sessions.
They will also be prescribed a hypocaloric dietary during these 4-week treatment.
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A hypocaloric dietary prescription and individual counseling from a dietician in order to reduce 3% of their initial weight over 4-week treatment.
Altri nomi:
The electrodes will be placed at the same positions as in active stimulation; however, the device will be turned off after 30 s of stimulation.
Altri nomi:
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
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Weight loss
Lasso di tempo: 4 weeks
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3% weight loss
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4 weeks
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Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
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Changes in hormone levels after 4 week treatment
Lasso di tempo: baseline and 4 weeks
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Changes in hormone levels of satiety, appetite and endocrine pancreas, such as insulin comparing baseline to end of intervention.
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baseline and 4 weeks
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Glycated Albumin
Lasso di tempo: baseline and 4 weeks
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Reduction in fasting glycated albumin compared to baseline
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baseline and 4 weeks
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Fasting Plasma Glucose
Lasso di tempo: baseline and 4 weeks
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Reduction in fasting plasma glucose from baseline
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baseline and 4 weeks
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Homeostatic Model Assessment (HOMA)
Lasso di tempo: 4 weeks
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Insulin sensitivity index (HOMA-S) and Beta-cell dysfunction (HOMA-beta)
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4 weeks
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Body Mass Index (BMI)
Lasso di tempo: 4 weeks
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Number of patients who achieved a BMI reduction unit
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4 weeks
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Intake of calories
Lasso di tempo: 4 weeks
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Reduction or maintenance of the prescribed intake of calories during the 4-week intervention, in kcal/day, using a 3 days of food record, with food weighing.
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4 weeks
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Weight, waist circumference and total body fat loss after 3 and 6 month of end of intervention
Lasso di tempo: 3 and 6 month after end of intervention
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weight and waist circumference loss
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3 and 6 month after end of intervention
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Collaboratori e investigatori
Investigatori
- Investigatore principale: Fernando Gerchman, MD, Hospital de Clínicas de Porto Alegre
Pubblicazioni e link utili
Pubblicazioni generali
- Gandiga PC, Hummel FC, Cohen LG. Transcranial DC stimulation (tDCS): a tool for double-blind sham-controlled clinical studies in brain stimulation. Clin Neurophysiol. 2006 Apr;117(4):845-50. doi: 10.1016/j.clinph.2005.12.003. Epub 2006 Jan 19.
- Nitsche MA, Paulus W. Excitability changes induced in the human motor cortex by weak transcranial direct current stimulation. J Physiol. 2000 Sep 15;527 Pt 3(Pt 3):633-9. doi: 10.1111/j.1469-7793.2000.t01-1-00633.x.
- Goldman RL, Borckardt JJ, Frohman HA, O'Neil PM, Madan A, Campbell LK, Budak A, George MS. Prefrontal cortex transcranial direct current stimulation (tDCS) temporarily reduces food cravings and increases the self-reported ability to resist food in adults with frequent food craving. Appetite. 2011 Jun;56(3):741-6. doi: 10.1016/j.appet.2011.02.013. Epub 2011 Feb 23.
- Jauch-Chara K, Kistenmacher A, Herzog N, Schwarz M, Schweiger U, Oltmanns KM. Repetitive electric brain stimulation reduces food intake in humans. Am J Clin Nutr. 2014 Oct;100(4):1003-9. doi: 10.3945/ajcn.113.075481. Epub 2014 Aug 6.
- Poreisz C, Boros K, Antal A, Paulus W. Safety aspects of transcranial direct current stimulation concerning healthy subjects and patients. Brain Res Bull. 2007 May 30;72(4-6):208-14. doi: 10.1016/j.brainresbull.2007.01.004. Epub 2007 Jan 24.
- Brunoni AR, Nitsche MA, Bolognini N, Bikson M, Wagner T, Merabet L, Edwards DJ, Valero-Cabre A, Rotenberg A, Pascual-Leone A, Ferrucci R, Priori A, Boggio PS, Fregni F. Clinical research with transcranial direct current stimulation (tDCS): challenges and future directions. Brain Stimul. 2012 Jul;5(3):175-195. doi: 10.1016/j.brs.2011.03.002. Epub 2011 Apr 1.
- Brunoni AR, Amadera J, Berbel B, Volz MS, Rizzerio BG, Fregni F. A systematic review on reporting and assessment of adverse effects associated with transcranial direct current stimulation. Int J Neuropsychopharmacol. 2011 Sep;14(8):1133-45. doi: 10.1017/S1461145710001690. Epub 2011 Feb 15.
- Sumithran P, Prendergast LA, Delbridge E, Purcell K, Shulkes A, Kriketos A, Proietto J. Long-term persistence of hormonal adaptations to weight loss. N Engl J Med. 2011 Oct 27;365(17):1597-604. doi: 10.1056/NEJMoa1105816.
- Liebetanz D, Koch R, Mayenfels S, Konig F, Paulus W, Nitsche MA. Safety limits of cathodal transcranial direct current stimulation in rats. Clin Neurophysiol. 2009 Jun;120(6):1161-7. doi: 10.1016/j.clinph.2009.01.022. Epub 2009 Apr 28.
- Gorenstein C, Andrade L. Validation of a Portuguese version of the Beck Depression Inventory and the State-Trait Anxiety Inventory in Brazilian subjects. Braz J Med Biol Res. 1996 Apr;29(4):453-7.
- Bertolazi AN, Fagondes SC, Hoff LS, Pedro VD, Menna Barreto SS, Johns MW. Portuguese-language version of the Epworth sleepiness scale: validation for use in Brazil. J Bras Pneumol. 2009 Sep;35(9):877-83. doi: 10.1590/s1806-37132009000900009. English, Portuguese.
- Boggio PS, Zaghi S, Villani AB, Fecteau S, Pascual-Leone A, Fregni F. Modulation of risk-taking in marijuana users by transcranial direct current stimulation (tDCS) of the dorsolateral prefrontal cortex (DLPFC). Drug Alcohol Depend. 2010 Dec 1;112(3):220-5. doi: 10.1016/j.drugalcdep.2010.06.019. Epub 2010 Aug 21.
- Schur EA, Kleinhans NM, Goldberg J, Buchwald D, Schwartz MW, Maravilla K. Activation in brain energy regulation and reward centers by food cues varies with choice of visual stimulus. Int J Obes (Lond). 2009 Jun;33(6):653-61. doi: 10.1038/ijo.2009.56. Epub 2009 Apr 14.
- Fregni F, Orsati F, Pedrosa W, Fecteau S, Tome FA, Nitsche MA, Mecca T, Macedo EC, Pascual-Leone A, Boggio PS. Transcranial direct current stimulation of the prefrontal cortex modulates the desire for specific foods. Appetite. 2008 Jul;51(1):34-41. doi: 10.1016/j.appet.2007.09.016. Epub 2007 Dec 23.
- Montenegro RA, Okano AH, Cunha FA, Gurgel JL, Fontes EB, Farinatti PT. Prefrontal cortex transcranial direct current stimulation associated with aerobic exercise change aspects of appetite sensation in overweight adults. Appetite. 2012 Feb;58(1):333-8. doi: 10.1016/j.appet.2011.11.008. Epub 2011 Nov 12.
- Kekic M, McClelland J, Campbell I, Nestler S, Rubia K, David AS, Schmidt U. The effects of prefrontal cortex transcranial direct current stimulation (tDCS) on food craving and temporal discounting in women with frequent food cravings. Appetite. 2014 Jul;78:55-62. doi: 10.1016/j.appet.2014.03.010. Epub 2014 Mar 20.
- Lapenta OM, Sierve KD, de Macedo EC, Fregni F, Boggio PS. Transcranial direct current stimulation modulates ERP-indexed inhibitory control and reduces food consumption. Appetite. 2014 Dec;83:42-48. doi: 10.1016/j.appet.2014.08.005. Epub 2014 Aug 13.
- Graff SK, Alves BC, Toscani MK, Spritzer PM. Benefits of pedometer-measured habitual physical activity in healthy women. Appl Physiol Nutr Metab. 2012 Feb;37(1):149-56. doi: 10.1139/h11-145. Epub 2012 Jan 30.
- Juraschek SP, Steffes MW, Miller ER 3rd, Selvin E. Alternative markers of hyperglycemia and risk of diabetes. Diabetes Care. 2012 Nov;35(11):2265-70. doi: 10.2337/dc12-0787. Epub 2012 Aug 8.
- de Araujo C, Fitz RC, Natividade GR, Osorio AF, Merello PN, Schoffel AC, Brietzke E, Azevedo MJ, Schestatsky P, Gerchman F. The effect of transcranial direct current stimulation along with a hypocaloric diet on weight loss in excessive weight people: A pilot randomized clinical trial. Clin Nutr ESPEN. 2020 Dec;40:68-76. doi: 10.1016/j.clnesp.2020.10.005. Epub 2020 Oct 22.
- Araujo C, Fitz RC, Nogara DA, Schestatsky P, Gerchman F. Effect of transcranial direct current stimulation associated with hypocaloric diet on weight loss and metabolic profile in overweight or obesity: study protocol for a double-blind, randomized controlled clinical trial. Trials. 2018 Jul 16;19(1):386. doi: 10.1186/s13063-018-2776-3.
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Completamento primario (Anticipato)
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Date di iscrizione allo studio
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Stima)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento inviato che soddisfa i criteri QC
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Maggiori informazioni
Termini relativi a questo studio
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
- 15-0119
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Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .
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