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Deep Brain Stimulation for the Treatment of Refractory Anorexia Nervosa

28. oktober 2019 opdateret af: Andres M. Lozano, University Health Network, Toronto
Anorexia Nervosa (AN) is a challenging, chronic, refractory illness with the highest mortality rate of any psychiatric condition. Advances in the neuroimaging, genetics and neurobiology of AN has led to a greater understanding of its underlying pathophysiology, although few significant advances in treatment have been made in the last half-century. The central features of AN, which include an intense fear of gaining weight, a refusal to maintain a normal weight, as well as significant anxiety, anhedonia and dysphoria surrounding food, have been linked to dysfunction in key brain structures and circuits. Deep Brain Stimulation (DBS) is a neurosurgical procedure that involves the insertion of electrodes into structures believed to drive pathological behavior. The procedure is approved for the management of movement disorders, such as Parkinson's Disease, and has shown promising early results in the management of some psychiatric conditions, such as Major Depression. The purpose of this study is to explore the safety and initial efficacy of DBS, in patients with treatment resistant AN.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Anorexia nervosa is a chronic, and debilitating psychiatric disorder associated with the highest mortality rate of any psychiatric condition. Despite advances in neuroimaging, genetics, pharmacology and psychosocial interventions in the last half century, little progress have been made in altering the natural history of the condition or its outcomes. It has further become increasingly accepted that the thoughts and behaviors at the root of AN derive from dysfunctional neuroanatomic circuits, whose activity and deviations can be detected with sophisticated neuroimaging techniques. Much progress has also been made in mapping the psychology of the illness to underlying neuroanatomic and neurophysiologic processes that drive and maintain these behaviors, even in the face of severe starvation and impending death. Dysfunctional reward processing, compulsive hyperactivity, chronic anxiety and depression, all suggest that AN shares much in common with other conditions, such as OCD, for which surgical therapy has been tried, and met with success.

Deep Brain Stimulation is a neurosurgical tool that has been widely used for over twenty years. Most of the experience with DBS comes from the movement disorder literature where significant success has been had with the management of disabling Parkinson's disease (PD) and dystonia. The most experience so far has been in Parkinson's disease where well over 50,000 patients globally have received the operation. DBS is believed to work by using small amounts of electricity to disrupt the activity of brain structures that produce troublesome symptoms. DBS has also been used in psychiatric patients, both as part of treatment and research, in cases of Obsessive-Compulsive Disorder (OCD), and research, in cases of Depression. Current research suggests that there are similarities between Anorexia Nervosa and conditions such as OCD and depression. Given that DBS has shown promise in the treatment of those conditions, this trial was designed to see if it could be an effective therapy for Anorexia Nervosa as well.

This study would be the first exploration of a surgical therapy for refractory AN. The rationale stems from clear and robust evidence pointing at a dysfunctional cortical-subcortical loop driving abnormal behavior, with several important nodes in the loop being particularly important, and recurring, players. The subgenual cingulate plays a role in affective decision making, reward processing, as well as subsequent anxiety and dysphoric mood.

There are currently no brain based, targeted therapies for AN. The scientific significance of this study will be:

i) The first clinical trial exploring deep brain stimulation in an eating disorder population

ii) The first demonstration of the influence of deep brain stimulation on dysfunctional reward processing with co-morbid anxiety/dysphoria

iii) The first 'brain-based' treatment for any eating disorder

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

15

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

    • Ontario
      • Toronto, Ontario, Canada, M5T2S8
        • Toronto Western Hospital

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

20 år til 60 år (Voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Female or Male patients between age 20-60
  • Diagnosis of Anorexia Nervosa, restricting or binge-purging subtype as defined by the Diagnostic and Statistical Manual (DSM-IVR)
  • Chronicity and/or Treatment Resistance as demonstrated by some or all of:

    1. A pattern of three year's duration of relentless unresponsiveness to repeated voluntary hospitalizations, characterized by failure to complete treatment of immediate weight relapse following treatment;
    2. pattern of increasing medical instability accompanied by refusal to participate in/lack of responsiveness to intensive expert treatment and increasing medical acuity, lasting at least two years and involving at least two episodes of involuntary feeding;
    3. A pattern of chronic stable AN lasting at least 10 years
  • Able to comply with all testing, follow-ups and study appointments and protocols

Exclusion Criteria:

  • Any past or current evidence of psychosis
  • Active neurologic disease such as epilepsy
  • Alcohol or substance dependence or abuse in the last 6 months, excluding caffeine and nicotine
  • Any contraindication to Magnetic Resonance Imaging (MRI) or Positron Emission Tomography (PET) scanning
  • Likely to relocate or move during the study's one year duration
  • BMI less than 13
  • Presence of cardiac arrhythmias, or other cardiac, respiratory, renal or endocrine conditions as a result of AN or not, that will result in significant risk from a surgical procedure.
  • Pregnancy

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: N/A
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Deep Brain Stimulation
Deep Brain Stimulation (DBS) is a neurosurgical procedure involving the implantation of deep brain electrodes, connected via a subcutaneous extension wire, to an implantable pulse generator (IPG, or 'battery') that is implanted below the collarbone.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Eating Disorder Related Preoccupations and Rituals
Tidsramme: Change from baseline in Eating Disorder Related Preoccupations and Rituals scores at 3 months, 6 months and 12 months
Eating Disorder Related Preoccupations and Rituals scores
Change from baseline in Eating Disorder Related Preoccupations and Rituals scores at 3 months, 6 months and 12 months

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Depression
Tidsramme: Change from baseline in depression scores at 3 months, 6 months and 12 months
Hamilton Depression Rating Scale (HAMD), Beck Depression Inventory (BDI)
Change from baseline in depression scores at 3 months, 6 months and 12 months
Anxiety
Tidsramme: Change from baseline in anxiety scores at 3 months, 6 months and 12 months
Beck Anxiety Inventory (BAI)
Change from baseline in anxiety scores at 3 months, 6 months and 12 months
Quality of Life questionnaire score through change from baseline compared to post-implant visit
Tidsramme: Change from baseline in Quality of Life scores at 3 months, 6 months and 12 months
Health Survey Short Form (SF36), Quality of Life Scale
Change from baseline in Quality of Life scores at 3 months, 6 months and 12 months

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Efterforskere

  • Ledende efterforsker: Andres M Lozano, MD, PhD, University Health Network, Toronto
  • Ledende efterforsker: Blake Woodside, MD, Toronto General Hospital

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. juli 2011

Primær færdiggørelse (Faktiske)

1. februar 2014

Studieafslutning (Faktiske)

1. februar 2014

Datoer for studieregistrering

Først indsendt

15. november 2011

Først indsendt, der opfyldte QC-kriterier

17. november 2011

Først opslået (Skøn)

22. november 2011

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

30. oktober 2019

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

28. oktober 2019

Sidst verificeret

1. oktober 2019

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 10-0991-A

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med Anoreksi

Kliniske forsøg med Deep Brain Stimulation

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