Diese Seite wurde automatisch übersetzt und die Genauigkeit der Übersetzung wird nicht garantiert. Bitte wende dich an die englische Version für einen Quelltext.

Compulsive Eating and Brain's Reward System in Different Pathologies (BI-POTATOS)

2. November 2026 aktualisiert von: University Hospital, Clermont-Ferrand

Bipolar Disorders, Parkinson's Disease, ObesiTy and Compulsive eAting: TransnosOlogical Assessement of the Brain's Reward System

Compulsive eating behaviors represent a significant issue across various disorders such as Parkinson's disease, bipolar disorders, and obesity.

Despite their apparent differences, these conditions share common underlying disturbances involving the brain's reward system, particularly within dopaminergic networks.6,7 Previous neuroimaging studies have consistently reported reward system connectivity impairment associated with compulsive eating, in each of these disorders. However, few studies have simultaneously explored the neurobiological similarities and specificities of this common symptom, eating behavior, when occurring in different populations and disorders.

The Bi-POTATOS project proposes an original and innovative approach by adopting a transdiagnostic perspective, employing brain imaging and comprehensive psycho-behavioral assessments to investigate common behavioral characteristics and neural circuit alterations associated with compulsive eating across these three conditions. For the first time, this study will allow a direct comparison of the cerebral signatures linked to compulsive eating behavior, clearly distinguishing between transdiagnostic vulnerabilities and features unique to each clinical condition.

The central hypothesis is that similar dysfunctions in brain regions involved in motivation and impulsive decision-making underpin compulsive eating behaviors, irrespective of the initial diagnosis. However, the underlying pathology may modulate these mechanisms, introducing certain specificities.

By clarifying these common mechanisms, the Bi-POTATOS project will not only enhance our understanding of the neurobiological etiology of these disorders but also pave the way for innovative, targeted therapeutic interventions. This project will precisely identify whether specific neural alterations constitute a universally relevant therapeutic target, or conversely, determine which alterations necessitate tailored therapeutic strategies based on the underlying pathology.

Studienübersicht

Status

Noch keine Rekrutierung

Bedingungen

Intervention / Behandlung

Studientyp

Interventionell

Einschreibung (Geschätzt)

150

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studienorte

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

18 Jahre bis 80 Jahre (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Alle

Beschreibung

Inclusion Criteria:

  • 1-Common Criteria (Parkinson disease, Obesity, Bipolar patients)

  • Men or women, right-handed, 18 to 80 years old

  • With or without compulsive eating according to the QEWP-R

  • No changes to long-term treatments in the previous month

  • Cooperation and understanding to strictly comply with the conditions set out in the protocol

  • Acceptance of the protocol and signing of a written informed consent

  • Affiliation to the social security system

    2-Specific criteria Parkinsonian patients (n=25 with CE, n=25 without CE)

  • Diagnosis of Parkinson's disease according to the Movement Disorders Society criteria

  • BMI<30

Obese patients (n=25 with CE, n=25 without CE)

  • Obese patients according to HAS 2022 classification
  • BMI≥30

Bipolar patients (n=25 with CE, n=25 without CE)

  • Diagnosis of bipolar disorder according to DSM 5 criteria
  • BMI<30

Exclusion Criteria:

  • 1-Common Criteria

  • Dementia (MoCA <22)

  • Severe depression (Beck Depression Inventory>30)

  • Contraindications to MRI (implanted stimulator, insulin pump, intraocular metallic foreign bodies or close to the nervous and vascular systems, claustrophobia, non-removable dental appliance, tattoo on the face or neck, …)

  • Refusal to be informed in case of incidental finding on MRI

  • History of stroke or brain trauma that may impact MRI findings

  • Patients under guardianship, deprived of freedoms or protection of justice.

  • Pregnant women, breastfeeding women

    2- Specific criteria

Parkinsonian patients:

  • People suffering from neurological pathologies other than PD
  • Patient suffering from psychiatric disorder
  • Treated with deep brain stimulation
  • Patients with severe tremor (> 3 for a tremor sub-item of the MDS-UPDRS III) or excessively severe dyskinesia contraindicating MRI

Obese patients:

  • Suffering from progressive neurological pathology and psychiatric disorder
  • Weight >220kg contraindicating MRI
  • Body (Shoulder) diameter > 220 cm contraindicating MRI
  • History of bariatric surgery
  • GLP1 treatment

Bipolar patients:

  • Suffering from neurological pathology and psychiatric disorder other than bipolar disorder
  • Current acute depressive or hypomanic episode according to DSM 5
  • Treated with deep brain stimulation or vagus nerve stimulation
  • Electroconvulsivotherapy < 6 months

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Grundlegende Wissenschaft
  • Zuteilung: N / A
  • Interventionsmodell: Einzelgruppenzuweisung
  • Maskierung: Keine (Offenes Etikett)

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: Study Group

Visit 1 : selection visit

  • Inform consent and participation agreement
  • Assessment of the disease and eating behavior disorder severity, medication taken, as well as a standard medical examination (measurement of weight, height and blood pressure) Cognitive function, impulsive trait of personality, depression, anxiety, restless legs syndrome, REM sleep behavior disorder and pain will be assessed.

Visit 2 : investigational visit

  • MRI scan
  • neuropsychological assessments

Neuropsychological assessment : motor impulsivity, motor inhibition, cognitive impulsivity (Stroop); decision making in an ambiguous context (Iowa Gambling Task), time perception (delay discounting reward task) and risk taking (Balloon analog Risk task).

MRI : The subjects will be scanned using a 3-Tesla MAGNETOM Vida scanner (Siemens, Erlangen, Germany) with a 64 channel head coil Dietician : 3 days food record

Andere Namen:
  • Neuropsychologische Beurteilungen
  • Ernährungsberater

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Assessment of resting state seed-based functional connectivity from the limbic striatum (seed: ventral striatum) by MRI.
Zeitfenster: At visit 2, between 1 and 12 weeks after patient enrollment

MRI is a 3-Tesla MAGNETOM Vida scanner (Siemens, Erlangen, Germany) with a 64 channel head coil.

The subjects were asked to hold still, with their eyes open and not to think of anything particular. Foam padding was employed to reduce head movement and earplugs were used to reduce scanner noise.

The high resolution anatomical images were obtained through a T1-weighted magnetization-prepared rapid gradient echo (MPRAGE) sequence with the following parameters: repetition time (TR): 2300 ms, echo time (TE): 3.08 ms, inversion time (IT): 900 ms, flip angle (FA): 9°, matrix: 288 x 288, 176 slices, slice thickness: 1mm.

Resting-state functional MRI images were obtained using an EPI sequence with the following parameters: TR: 3000ms, TE: 30ms, FA: 81°, field of view (FOV): 192 mm, 55 slices, slice thickness: 3.3 mm, gap between slices: 3.3 mm, pixel bandwidth: 2441 Hz/Pixel, number of time points: 180, acquisition duration: 9 minutes).

At visit 2, between 1 and 12 weeks after patient enrollment

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Demographical data
Zeitfenster: at visit 1, selection visit - Day 0

sex

at visit 1, selection visit - Day 0
Demographical data
Zeitfenster: at visit 1, selection visit - Day 0

Age (year)

at visit 1, selection visit - Day 0
Demographical data
Zeitfenster: at visit 1, selection visit - Day 0

weight (kg)

at visit 1, selection visit - Day 0
Demographical data
Zeitfenster: at visit 1, selection visit - Day 0

size (m)

at visit 1, selection visit - Day 0
Parkinson Disease severity
Zeitfenster: at visit 1, selection visit - Day 0

Assessment of parkinson desease with the MDS-UPDRS (Movement Disorders Society - Unified Parkinson's Disease Rating Scale ) scale, completed by the investigator.

at visit 1, selection visit - Day 0
Bipolar Disease severity
Zeitfenster: at visit 1, selection visit - Day 0

Assessment of bipolar desease with MADRS (Montgomery-Asberg Depression Rating Scale) and YMRS (Young Mania Rating Scale) scale, completed by the investigator.

at visit 1, selection visit - Day 0
Obesity disease severity
Zeitfenster: at visit 1, selection visit - Day 0

Obesity classification according to Health French Agency (Haute Autorité de Santé) 2022, completed by the investigator.

at visit 1, selection visit - Day 0
Impulsive trait of Personality according the Barratt impulsiveness scale (BIS-11)
Zeitfenster: at visit 1, selection visit - Day 0

This self questionnaire is completed by the patient during the selection visit

at visit 1, selection visit - Day 0
Eating behavior disorder severity
Zeitfenster: at visit 1, selection visit - Day 0

Self reported eating behavior disorder using 3 questionnaires (QEWP5 (Questionnaire on Eating and Weight Patterns5), DEBQ (Dutch Eating Behaviour Questionnaire) and food craving questionnaire))

at visit 1, selection visit - Day 0
Presence of Anxiety and/or depression according the Beck depression and anxiety scale
Zeitfenster: at visit 1, selection visit - Day 0

These self questionnaires is completed by the patient during the selection visit

at visit 1, selection visit - Day 0
Presence of restless legs syndrome according the International Restless Legs Syndrome (Rating Scale)
Zeitfenster: at visit 1, selection visit - Day 0

This questionnaire is completed by the investigator during the selection visit

at visit 1, selection visit - Day 0
Intensity and Pain caracteristics
Zeitfenster: at visit 1, selection visit - Day 0

Patients will evaluate their pain using 2 self questionnaires (3-PDQ, BPI (Brief Pain Inventory))

at visit 1, selection visit - Day 0
Impulsive compulsive behaviors rating scale for PD (QUIP-RS)
Zeitfenster: at visit 2, between 1 and 12 weeks after selection visit

The QUIP-RS is a brief 28-item patient-reported or clinician-rated scale developped for measure of severity of ICDs. Each item is rated on a 5-point Likert scale assessing frequency of symptoms with a range of scores from 0 (never) to 4 (very often).

at visit 2, between 1 and 12 weeks after selection visit
Spontaneous food intake
Zeitfenster: at visit 2, between 1 and 12 weeks after selection visit

Patients will report thier spontaneous food intake for 3 days using a dietary data collected. Patient nutritional intakes will be analysed using Nutrilog software

at visit 2, between 1 and 12 weeks after selection visit
Motor impulsivity (Go/No Go task)
Zeitfenster: at visit 2, between 1 and 12 weeks after selection visit

Motor impulsivity will be assessed with the Go/No-go task. It is a simple experimental paradigm that requires participants to respond as quickly as possible (Go) to a particular class of stimuli, for example by pressing a key on a keyboard, and not to respond to other classes of stimuli (No Go). The key behaviour measured with this experiment is the participants' ability to withhold a response on No-go trials.

at visit 2, between 1 and 12 weeks after selection visit
Motor inhibition (Stop Signal Task (SST))
Zeitfenster: at visit 2, between 1 and 12 weeks after selection visit

The Stop Signal Task (SST) is a test that measures motor inhibition. The participant must respond quickly to Go stimuli but interrupt their response when a stop signal appears. The key index, the Stop Signal Reaction Time (SSRT), reflects the time required to stop an ongoing action. This test will be performed by neuropsychologist.

at visit 2, between 1 and 12 weeks after selection visit
Iowa Gambling Task (IGT)
Zeitfenster: at visit 2, between 1 and 12 weeks after selection visit.

IGT assesses risk-based learning by relying on a system of rewards and punishments within a simulated context of uncertainty, representing a real-life decision-making situation.

Participants choose cards from four decks, each associated with varying amounts of monetary gains and losses. Over time, advantageous decks yield higher net rewards, while disadvantageous decks lead to net losses.

Performance on the task reflects an individual's capacity to balance immediate rewards against long-term outcomes, thereby providing insight into adaptive decision-making and risk evaluation processes.

This test will be performed by neuropsychologist.

at visit 2, between 1 and 12 weeks after selection visit.
Cognitive impulsivity (Stroop)
Zeitfenster: at visit 2, between 1 and 12 weeks after selection visit

The Stroop Test is a cognitive task designed to evaluate attentional control and the ability to inhibit automatic responses when faced with conflicting information. Participants are asked to name the color of the ink in which words are printed, even when the word itself refers to a different color (e.g., GREEN printed in red ink). This requires suppressing the automatic tendency to read the word and instead focusing on the ink color. The difference in performance between congruent and incongruent conditions, known as the Stroop interference effect, is a key indicator of cognitive inhibition and executive control. This test will be performed by neuropsychologist.

at visit 2, between 1 and 12 weeks after selection visit
Time perception (delay discounting reward task)
Zeitfenster: at visit 2, between 1 and 12 weeks after selection visit

Participants make choices between two alternatives: a larger reward available after a delay (across seven delay intervals) and a smaller reward available immediately. The value of the immediate reward is systematically adjusted, either increasing or decreasing, in separate blocks. The task assesses preferences for immediate versus delayed gratification using two reward types: money and food. This test will be performed by neuropsychologist.

at visit 2, between 1 and 12 weeks after selection visit
Balloon analog Risk task
Zeitfenster: at visit 2, between 1 and 12 weeks after selection visit

Participants are given 30 balloons (by default). For each balloon, they can choose either to inflate it further or to collect their earnings. With each successful inflation, they can earn money. However, if a balloon bursts before the participant collects the potential earnings, they lose all potential gains associated with that balloon.

The average number of pumps on balloons that do not burst is the primary dependent variable in this paradigm. A higher number of pumps reflects increased risk-taking behavior. This test will be performed by neuropsychologist.

at visit 2, between 1 and 12 weeks after selection visit
Surface based (Freesurfer) and Voxel based (SPM) morphometry performed by MRI
Zeitfenster: at visit 2, between 1 and 12 weeks after selection visit

MRI is a 3-Tesla MAGNETOM Vida scanner (Siemens, Erlangen, Germany) with a 64 channel head coil.

The subjects were asked to hold still, with their eyes open and not to think of anything particular. Foam padding was employed to reduce head movement and earplugs were used to reduce scanner noise.

The high resolution anatomical images were obtained through a T1-weighted magnetization-prepared rapid gradient echo (MPRAGE) sequence with the following parameters: repetition time (TR): 2300 ms, echo time (TE): 3.08 ms, inversion time (IT): 900 ms, flip angle (FA): 9°, matrix: 288 x 288, 176 slices, slice thickness: 1mm.

Resting-state functional MRI images were obtained using an EPI sequence with the following parameters: TR: 3000ms, TE: 30ms, FA: 81°, field of view (FOV): 192 mm, 55 slices, slice thickness: 3.3 mm, gap between slices: 3.3 mm, pixel bandwidth: 2441 Hz/Pixel, number of time points: 180, acquisition duration: 9 minutes).

at visit 2, between 1 and 12 weeks after selection visit
Structural connectivity (MRtrix and TRACTseg) performed by MRI
Zeitfenster: at visit 2, between 1 and 12 weeks after selection visit

MRI is a 3-Tesla MAGNETOM Vida scanner (Siemens, Erlangen, Germany) with a 64 channel head coil.

The subjects were asked to hold still, with their eyes open and not to think of anything particular. Foam padding was employed to reduce head movement and earplugs were used to reduce scanner noise.

The high resolution anatomical images were obtained through a T1-weighted magnetization-prepared rapid gradient echo (MPRAGE) sequence with the following parameters: repetition time (TR): 2300 ms, echo time (TE): 3.08 ms, inversion time (IT): 900 ms, flip angle (FA): 9°, matrix: 288 x 288, 176 slices, slice thickness: 1mm.

Resting-state functional MRI images were obtained using an EPI sequence with the following parameters: TR: 3000ms, TE: 30ms, FA: 81°, field of view (FOV): 192 mm, 55 slices, slice thickness: 3.3 mm, gap between slices: 3.3 mm, pixel bandwidth: 2441 Hz/Pixel, number of time points: 180, acquisition duration: 9 minutes).

at visit 2, between 1 and 12 weeks after selection visit
Resting state seed-based functional connectivity from the limbic striatum performed by MRI
Zeitfenster: at visit 2, between 1 and 12 weeks after selection visit

MRI is a 3-Tesla MAGNETOM Vida scanner (Siemens, Erlangen, Germany) with a 64 channel head coil.

The subjects were asked to hold still, with their eyes open and not to think of anything particular. Foam padding was employed to reduce head movement and earplugs were used to reduce scanner noise.

The high resolution anatomical images were obtained through a T1-weighted magnetization-prepared rapid gradient echo (MPRAGE) sequence with the following parameters: repetition time (TR): 2300 ms, echo time (TE): 3.08 ms, inversion time (IT): 900 ms, flip angle (FA): 9°, matrix: 288 x 288, 176 slices, slice thickness: 1mm.

Resting-state functional MRI images were obtained using an EPI sequence with the following parameters: TR: 3000ms, TE: 30ms, FA: 81°, field of view (FOV): 192 mm, 55 slices, slice thickness: 3.3 mm, gap between slices: 3.3 mm, pixel bandwidth: 2441 Hz/Pixel, number of time points: 180, acquisition duration: 9 minutes).

at visit 2, between 1 and 12 weeks after selection visit

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Geschätzt)

1. Dezember 2026

Primärer Abschluss (Geschätzt)

1. Juli 2029

Studienabschluss (Geschätzt)

1. Oktober 2029

Studienanmeldedaten

Zuerst eingereicht

27. Juli 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

2. November 2026

Zuerst gepostet (Tatsächlich)

6. November 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

6. November 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

2. November 2026

Zuletzt verifiziert

1. November 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .