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Functional Neuroimaging in Fibromyalgia Patients Receiving tDCS

17 luglio 2013 aggiornato da: Hospital de Clinicas de Porto Alegre

Study of the Brain With Optic Functional Neuroimaging in Patients With Chronic Pain Using Transcranial Direct Current Stimulation

The purpose of this study is to evaluate effectiveness and cerebral neuronal ability to adaptation in patients with fibromyalgia who receive pregabalin and transcranial direct current stimulation.

Panoramica dello studio

Stato

Sconosciuto

Condizioni

Intervento / Trattamento

Descrizione dettagliata

Fibromyalgia syndrome occurs in around 2% of the population (predominantly women), and is characterized by its poor response to conventional therapies. Therapeutic approaches modulating inhibitory pathways, including pharmacologic options as pregabalin, and non pharmacological ones as transcranial direct current stimulation (tDCS) have been proven to be of limited utility independently. Aiming to evaluate a better understanding of the pathophysiogenic mechanisms and the effect of these treatments on neuroplasticity, this study was designed evaluating neurophysiologic, neurochemical and clinical parameters. Neurophysiologic parameters and functions to be assessed will include pain threshold, motor evoked potential, silent period, intracortical facilitation and inhibition assessed by Transcranial Magnetic Stimulation (TMS) and optic functional neuroimaging. Neurochemical measurements considered will be neurotrophins (BDNF) and inflammatory mediators (TNF, IL1, IL6, IL10 and cortisol). Clinical characteristics will be assessed using validated scales capable to detect functional capacity, quality of life (WHOCOHL), catastrophism, sleep disruptions (Pittsburgh) and depressive symptoms (Beck Depression Inventory). Considering the above described hypothesis, the present randomized clinical trial with blinded patients and evaluators is proposed. It pretends to analyze short-, mid- and long-term neurobiological mechanisms triggered by the selected interventions.

Tipo di studio

Interventistico

Iscrizione (Anticipato)

34

Fase

  • Fase 2

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Luoghi di studio

  • Brasile
    • Rio Grande do Sul
      • Porto Alegre, Rio Grande do Sul, Brasile, 90035-903
        • Reclutamento
        • Hospital De Clinicas De Porto Alegre
        • Contatto:
          • Wolnei Caumo, MD, PhD
          • Numero di telefono: (51) 3359 8083
          • Email: caumo@cpovo.net
        • Investigatore principale:
          • Wolnei Caumo, MD PhD

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

Da 18 anni a 65 anni (Adulto, Adulto più anziano)

Accetta volontari sani

No

Sessi ammissibili allo studio

Femmina

Descrizione

Inclusion Criteria:

  • - Diagnosis of fibromyalgia according to the American College of Rheumatology criteria

Exclusion Criteria:

  • Psychiatric or neurologic disorder that unable patient to consent and follow study protocol.
  • De-compensated systemic disease.
  • Chronic inflammatory disease (e.g. Systemic Lupus Erythematous, Rheumatoid Arthritis).

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Trattamento
  • Assegnazione: Randomizzato
  • Modello interventistico: Assegnazione parallela
  • Mascheramento: Separare

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Comparatore fittizio: Pregabalin, Sham tDCS
Patients will receive pregabalin 150 mg oral (PO) twice per day (BID), and sham transcranial direct current stimulation (sham tDCS) five times per week during 2 weeks, and then twice per week until week 8th. The sham tDCS consists of the same montage of the active tDCS, but the device is turned off 30 seconds after initiating stimulation (without letting the patient notice it). Rest of the montage is kept identical as the active one during the 30 minutes that the session lasts.
Droga: Pregabalin
Pregabalin 150 mg per oral BID (i.e. twice per day).
Altri nomi:
  • Lirica
Altro: Sham Transcranial Direct Current Stimulation
The sham tDCS consists of the same montage of the active tDCS, but the device is turned off 30 seconds after initiating stimulation (without letting the patient notice it). Rest of the montage is kept identical as the active one during the 30 minutes that the session lasts.
Altri nomi:
  • Sham tDCS
Sperimentale: Pregabalin, tDCS
Patients will receive pregabalin 150 mg oral(PO) twice per day (BID), and transcranial direct current stimulation (tDCS) five times per week during 2 weeks, and then twice per week until week 8th. The tDCS consists of application of low intensity direct current (2 mA), with the anode placed in the dominant motor cortex (M1) and the cathode in the ipsilateral supraorbital region during 30 minutes each session, using sponge electrodes soaked with normal saline solution.
Droga: Pregabalin
Pregabalin 150 mg per oral BID (i.e. twice per day).
Altri nomi:
  • Lirica
Altro: Transcranial Direct Current Stimulation
The tDCS consists of application of low intensity direct current (2 mA), with the anode placed in the dominant motor cortex (M1) and the cathode in the ipsilateral supraorbital region during 30 minutes each session, using sponge electrodes soaked with normal saline solution.
Altri nomi:
  • tDCS

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Change in the pressure pain threshold.
Lasso di tempo: Day 1 (1 hour before receiving the 1st dose of pregabalin; and 1 hour after the first dose of pregabalin); week 2 and week 8 after initiating the allocated intervention.
Assessed with pressure algometer. Will be assessed before and 1 hour after a single dose of 150 mg of Pregabalin. Patients will also receive pregabalin 150 mg BID + tDCS (or sham tDCS) daily during 2 weeks, and then twice per week until week 8th. Pain thresholds will be assessed 2 and 8 weeks after initiating the allocated intervention. Total: Four evaluations.
Day 1 (1 hour before receiving the 1st dose of pregabalin; and 1 hour after the first dose of pregabalin); week 2 and week 8 after initiating the allocated intervention.
Change in cortical excitability parameters assessed by transcranial magnetic stimulation.
Lasso di tempo: Day 1 (1 hour before receiving the 1st dose of pregabalin; and 1 hour after the first dose of pregabalin); week 2 and week 8 after initiating the allocated intervention.
Will be assessed before and 1 hour after a single dose of 150 mg of Pregabalin. Patients will also receive pregabalin 150 mg BID + tDCS (or sham tDCS) daily during 2 weeks, and then twice per week until week 8th. Cortical Excitability will be assessed 2 and 8 weeks after initiating the allocated intervention. Total: Four Evaluations.
Day 1 (1 hour before receiving the 1st dose of pregabalin; and 1 hour after the first dose of pregabalin); week 2 and week 8 after initiating the allocated intervention.
Changes in motor cortex blood flow assessed by near infrared spectroscopy.
Lasso di tempo: Day 1 (1 hour before receiving the 1st dose of pregabalin; and 1 hour after the first dose of pregabalin); week 2 and week 8 after initiating the allocated intervention.
Will be assessed before and 1 hour after a single dose of 150 mg of Pregabalin. Patients will also receive pregabalin 150 mg BID + tDCS (or sham tDCS) daily during 2 weeks, and then twice per week until week 8th. Motor cortex blood flow will be assessed 2 and 8 weeks after initiating the allocated intervention. Total: Four Evaluations.
Day 1 (1 hour before receiving the 1st dose of pregabalin; and 1 hour after the first dose of pregabalin); week 2 and week 8 after initiating the allocated intervention.

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Change in the temperature pain threshold.
Lasso di tempo: Day 1 (1 hour before receiving the 1st dose of pregabalin; and 1 hour after the first dose of pregabalin); week 2 and week 8 after initiating the allocated intervention.
Will be assessed before and 1 hour after a single dose of 150 mg of Pregabalin. Patients will also receive pregabalin 150 mg BID + tDCS (or sham tDCS) daily during 2 weeks, and then twice per week until week 8th. Pain thresholds will be assessed 2 and 8 weeks after initiating the allocated intervention. Total: Four Evaluations.
Day 1 (1 hour before receiving the 1st dose of pregabalin; and 1 hour after the first dose of pregabalin); week 2 and week 8 after initiating the allocated intervention.
Change in the visual analogue scale for pain to prolonged thermal stimuli.
Lasso di tempo: Day 1 (1 hour before receiving the 1st dose of pregabalin; and 1 hour after the first dose of pregabalin); week 2 and week 8 after initiating the allocated intervention.
Will be assessed before and 1 hour after a single dose of 150 mg of Pregabalin. Patients will also receive pregabalin 150 mg BID + tDCS (or sham tDCS) daily during 2 weeks, and then twice per week until week 8th. Pain to prolonged thermal stimuli will be assessed 2 and 8 weeks after initiating the allocated intervention. Total: Four Evaluations.
Day 1 (1 hour before receiving the 1st dose of pregabalin; and 1 hour after the first dose of pregabalin); week 2 and week 8 after initiating the allocated intervention.
Change in average daily pain assessed with the visual analogue scale.
Lasso di tempo: Starting on day 1, each day until Week 12. Total: 84 Evaluations.
Patients will be asked to daily write down their average pain level (assessed by the Visual Analogue Scale, self-administered) in a paper diary. Total evaluations: 84.
Starting on day 1, each day until Week 12. Total: 84 Evaluations.
Change in the Fibromyalgia Impact Questionnaire.
Lasso di tempo: Day 1 (1 hour before receiving the 1st dose of pregabalin); week 2, week 8 and week 12 after initiating the allocated intervention.
Will be assessed before initiating treatment. Patients will receive pregabalin 150 mg BID + tDCS (or sham tDCS) daily during 2 weeks, and then twice per week until week 8th. Fibromyalgia Impact Questionnaire will be assessed 2, 8 and 12 weeks after initiating the allocated intervention. Total: Four Evaluations.
Day 1 (1 hour before receiving the 1st dose of pregabalin); week 2, week 8 and week 12 after initiating the allocated intervention.
Change in quality of life assessed by the WHOQOL (World Health Organization Quality of Life), reduced form, adapted to Brazilian Portuguese.
Lasso di tempo: Day 1 (1 hour before receiving the 1st dose of pregabalin), week 2, week 8 and week 12 after initiating the allocated intervention.
Will be assessed before initiating treatment. Patients will receive pregabalin 150 mg BID + tDCS (or sham tDCS) daily during 2 weeks, and then twice per week until week 8th. Quality of life will be assessed 2, 8 and 12 weeks after initiating the allocated intervention. Total: Four Evaluations.
Day 1 (1 hour before receiving the 1st dose of pregabalin), week 2, week 8 and week 12 after initiating the allocated intervention.

Altre misure di risultato

Misura del risultato
Misura Descrizione
Lasso di tempo
Serum biomarkers levels: The brain derived neurotrophic factor, salivary cortisol, tumor necrosis factor alpha, Interleukin 1, 6 and 10 levels will be measured.
Lasso di tempo: Day 1 (1 hour before receiving the 1st dose of pregabalin; and 1 hour after the first dose of pregabalin); week 2 and week 8 after initiating the allocated intervention.
Will be assessed before and 1 hour after a single dose of 150 mg of Pregabalin. Patients will also receive pregabalin 150 mg BID + tDCS (or sham tDCS) daily during 2 weeks, and then twice per week until week 8th. Motor cortex blood flow will be assessed 2 and 8 weeks after initiating the allocated intervention. Total: Four Evaluations.
Day 1 (1 hour before receiving the 1st dose of pregabalin; and 1 hour after the first dose of pregabalin); week 2 and week 8 after initiating the allocated intervention.
Level of depressive symptoms.
Lasso di tempo: Day 1 (1 hour before receiving the 1st dose of pregabalin), week 2 and week 8 after initiating the allocated intervention.
Will be assessed before initiating treatment. Patients will receive pregabalin 150 mg BID + tDCS (or sham tDCS) daily during 2 weeks, and then twice per week until week 8th. Depression symptoms will be assessed using the Beck Depression Inventory, which covers neurovegetative symptoms of depression. It will be assessed 2 and 8 weeks after initiating the allocated intervention. Total: Three Evaluations.
Day 1 (1 hour before receiving the 1st dose of pregabalin), week 2 and week 8 after initiating the allocated intervention.
Sleep quality.
Lasso di tempo: Day 1 (1 hour before receiving the 1st dose of pregabalin), week 2 and week 8 after initiating the allocated intervention.
Will be assessed before initiating treatment. Patients will receive pregabalin 150 mg BID + tDCS (or sham tDCS) daily during 2 weeks, and then twice per week until week 8th. Sleep quality will be assessed using the Pittsburgh Sleep Quality Index and the 10 cm scale of sleep quality. It will be assessed 2 and 8 weeks after initiating the allocated intervention. Total: Three Evaluations.
Day 1 (1 hour before receiving the 1st dose of pregabalin), week 2 and week 8 after initiating the allocated intervention.
Pain catastrophizing thoughts.
Lasso di tempo: Day 1 (1 hour before receiving the 1st dose of pregabalin), week 2 and week 8 after initiating the allocated intervention.
The level of catastrophic thinking will be assessed by the scale of catastrophic thoughts adapted to the Brazilian population (BP-PCS). Will be assessed before initiating treatment. Patients will receive pregabalin 150 mg PO BID + tDCS (or sham tDCS) daily during 2 weeks, and then twice per week until week 8th. Pain catastrophizing thoughts will be assessed 2 and 8 weeks after initiating the allocated intervention. Total: Three Evaluations.
Day 1 (1 hour before receiving the 1st dose of pregabalin), week 2 and week 8 after initiating the allocated intervention.

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Hospital de Clinicas de Porto Alegre

Investigatori

  • Investigatore principale: Wolnei Caumo, MD, PhD, Hospital De Clinicas De Porto Alegre

Pubblicazioni e link utili

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Pubblicazioni generali

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio

1 marzo 2013

Completamento primario (Anticipato)

1 luglio 2014

Completamento dello studio (Anticipato)

1 dicembre 2014

Date di iscrizione allo studio

Primo inviato

8 luglio 2013

Primo inviato che soddisfa i criteri di controllo qualità

17 luglio 2013

Primo Inserito (Stima)

22 luglio 2013

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Stima)

22 luglio 2013

Ultimo aggiornamento inviato che soddisfa i criteri QC

17 luglio 2013

Ultimo verificato

1 luglio 2013

Maggiori informazioni

Termini relativi a questo studio

Parole chiave

Termini MeSH pertinenti aggiuntivi

Altri numeri di identificazione dello studio

  • 120128

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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