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Connettività funzionale della rete interocettiva in RLS (IntoRLS)

22 settembre 2026 aggiornato da: University Hospital, Bordeaux

Connettività funzionale della rete interocettiva nella sindrome delle gambe senza riposo (RLS): uno studio prospettico anatomico-clinico basato sulla valutazione della vita quotidiana

Restless Legs Syndrome (RLS) is a sensorimotor disorder primarily characterized by an irresistible urge to move the legs while at rest. A key hypothesis suggests that RLS symptoms are linked to abnormal brain function in processing internally generated stimuli, particularly interoception. This distorted perception of the internal bodily state leads to maladaptive behaviors, which may manifest across a wide range of medical and psychiatric disorders. Here, the investigators hypothesize that dysfunction in the insular cortex (IC) may result in a failure of behavioral adaptation, primarily expressed as an urge to move the legs and hyperarousal, even when the body and mind need rest. This project aims to assess the relationship between interoceptive abilities and diurnal fluctuations in IC functional connectivity (FC) in patients with RLS compared to healthy controls. The investigators will also examine correlations between the FC of the interoceptive network, measured in the morning and evening on the same day, using multilayer network analysis, daily fluctuations in RLS symptom severity, and objective measurements of the sleep/wake cycle, gathered through a two-week ambulatory assessment using mobile technologies such as Ecological Momentary Assessment (EMA) and actigraphy, along with scores from self-reported questionnaires. The findings may provide strong evidence to support or refute the hypothesis of interoceptive dysfunction in RLS patients.

Panoramica dello studio

Stato

Reclutamento

Condizioni

Intervento / Trattamento

Descrizione dettagliata

Despite extensive research into the pathophysiology of RLS, no unified mechanism has been identified to explain the prominent clinical features of the disorder, including both sensorimotor and non-motor symptoms. One plausible hypothesis is that RLS symptoms are related to abnormal brain function in processing internally generated stimuli, particularly interoception. Distorted perceptions of the internal bodily state can lead to maladaptive behaviors, which may manifest in a wide range of medical disorders, including RLS, attention-deficit/hyperactivity disorder (ADHD), insomnia, eating disorders/obesity, fibromyalgia, and psychiatric conditions. The interoceptive abilities of RLS patients, specifically their capacity to perceive and assess their internal bodily state, have not been extensively studied, despite their potential to deepen our understanding of the sensorimotor discomfort in the legs and associated non-motor symptoms. The IntoRLS project will therefore precisely characterize the temporal variation in symptom severity and interoceptive awareness in RLS patients, alongside their sleep/wake cycle disturbances, using ambulatory assessments. This ecological assessment will be linked to time-of-day variations in intrinsic insular connectivity, assessed via functional brain imaging. At the inclusion visit, eligible participants (both patients and matched controls) will be provided with a study-dedicated smartphone for a two-week period, as well as a wearable actigraph to monitor their activity/rest cycles. Participants will complete self-reported questionnaires assessing the severity of RLS symptoms, ADHD symptoms, anxiety and depression, daytime sleepiness, and arousal predisposition. At the end of the participation period (J+14), participants will undergo functional brain imaging sessions in the morning and evening. Between the two sessions, each participant will complete the Multidimensional Assessment of Interoceptive Awareness (MAIA-2) questionnaire and perform the Heartbeat Detection Task to evaluate interoceptive accuracy.

Tipo di studio

Interventistico

Iscrizione (Stimato)

30

Fase

  • Non applicabile

Contatti e Sedi

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

Contatto studio

Backup dei contatti dello studio

Luoghi di studio

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 70 anni (Adulto, Adulto più anziano)

Accetta volontari sani

Sì

Sessi ammissibili allo studio

Tutto

Descrizione

Inclusion Criteria:

  • Person aged from 18 to 70 years
  • Only for the patients : ny patient with a diagnosis of idiopathic RLS based on medical history and the presence of the 5 RLS diagnostic criteria
  • Normal clinical examination
  • Person affiliated or benefiting from a social security scheme
  • Free, informed and written consent signed by the participant and the investigator (no later than the day of inclusion and prior to any review required by the research).

Exclusion Criteria:

  • Any significant psychiatric illness or mood disorder
  • History or presence of chronic pain other than that associated with RLS, history of epilepsy or serious head injury, history of peripheral neuropathy, diabetes
  • Clinically significant sleep apnea, narcolepsy, or any secondary causes of RLS (e.g. chronic renal failure/hemodialysis, pregnancy)
  • Other active clinically significant illness, including unstable cardiovascular, or neoplasic pathology which could interfere with the study conduct or interfere with study assessments or compromise the study participation
  • Contra-indication to MRI (pacemakers, aneurysm clips, artificial heart valves, ear implants, metal fragments or foreign objects in the eyes, skin or body, claustrophobia or refusing MRI)
  • Pregnant or breastfeeding woman
  • Persons referred to in articles L.1121-5 to L.1121-8 (persons deprived of liberty by judicial or administrative decision, minors, adults subject to a legal protection measure or unable to express their consent).

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: Altro
  • Assegnazione: Non randomizzato
  • Modello interventistico: Assegnazione parallela
  • Mascheramento: Nessuno (etichetta aperta)

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Comparatore attivo: controlli sani

To evaluate sleep quality, daytime somnolence and mood disorders (Pittsburgh Sleep Quality Index (PSQI), Insomnia Severity Index (ISI), Epworth Sleepiness Scale (ESS) and Hospital Anxiety and Depression Scale (HADS)).

4 electronic interviews administered per day during 14 days by a study-dedicated Android OS smartphone

To further investigate the mutual influence of sleep quality on RLS symptoms and mood, the activity-rest cycle will be monitored by wearable actigraph to be placed on the non-dominant wrist during a period of 13 days and 14 nights.

Interoceptive awareness and accuracy estimation : Adult ADHD Self-Report Scale (ASRS), Pre-Sleep Arousal Scale (PSAS), Arousal Predisposition Scale (APS) et Multidimensional Assessment of Interoceptive Awareness version 2 (MAIA-2)

Morning and evening functional brain imaging

Sperimentale: Sindrome delle gambe agitate

RLS history, RLS treatments, and International Restless Legs Syndrome Rating Scale (IRLSRS) will be recorded

To evaluate sleep quality, daytime somnolence and mood disorders (Pittsburgh Sleep Quality Index (PSQI), Insomnia Severity Index (ISI), Epworth Sleepiness Scale (ESS) and Hospital Anxiety and Depression Scale (HADS)).

4 electronic interviews administered per day during 14 days by a study-dedicated Android OS smartphone

To further investigate the mutual influence of sleep quality on RLS symptoms and mood, the activity-rest cycle will be monitored by wearable actigraph to be placed on the non-dominant wrist during a period of 13 days and 14 nights.

Interoceptive awareness and accuracy estimation : Adult ADHD Self-Report Scale (ASRS), Pre-Sleep Arousal Scale (PSAS), Arousal Predisposition Scale (APS) et Multidimensional Assessment of Interoceptive Awareness version 2 (MAIA-2)

Morning and evening functional brain imaging

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Functional Connectivity (FC) of the anterior and posterior insular cortex (IC) measured at rest.
Lasso di tempo: 14 days after baseline (Day 0)

The investigators hypothesize that this connectivity will differ between patients and control subjects.

This outcome will be assessed through the temporal fluctuation of the BOLD signal measured during the MRI examination conducted in the morning and again in the evening.

14 days after baseline (Day 0)

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Correlations will be explored between the scores obtained by patients and those of the healthy volunteer group on the various self-assessment scales.
Lasso di tempo: 14 days after baseline (Day 0)

Score comparisons on these same scales will also be conducted between the patient group and the healthy volunteer group. The scores analyzed will be those obtained on the following scales:

  • International Restless Legs Syndrome Rating Scale (IRLSRS) (to assess the severity of RLS),
  • Insomnia Severity Index (ISI),
  • Adult ADHD Self-Report Scale (ASRS) (to screen for symptoms of ADHD),
  • Hospital Anxiety and Depression Scale (HADS) (to assess levels of depression and anxiety),
  • Multidimensional Assessment of Interoceptive Awareness Version 2 (MAIA-2) (to evaluate interoceptive awareness),
  • Pre-Sleep Arousal Scale (PSAS) and Arousal Predisposition Scale (APS) (to measure levels of hypervigilance),
  • Epworth Sleepiness Scale (ESS) (to assess hypersomnolence).
14 days after baseline (Day 0)
Correlations will be explored between the severity score of the RLS and sleep parameters
Lasso di tempo: 14 days after baseline (Day 0)

assessed by actigraphy (specific measures including: Total Sleep Duration [minutes], Sleep Efficiency [%], Wake After Sleep Onset [minutes], and Sleep Onset Latency [minutes]) as well as scores from Ecological Momentary Assessment smartphone questionnaires.

14 days after baseline (Day 0)
Correlations will be explored between altered functional connectivity of the patients' insular cortex
Lasso di tempo: 14 days after baseline (Day 0)

(measured by statistical synchrony or temporal correlation of BOLD [Blood Oxygen Level Dependent] signals across different brain regions) and sleep parameters assessed by actigraphy (specific measures including Total Sleep Duration [minutes], Sleep Efficiency [%], Wake After Sleep Onset [minutes], and Sleep Onset Latency [minutes]) as well as scores from Ecological Momentary Assessment smartphone questionnaires.

Comparisons will also be made with results obtained from the healthy volunteer group.

14 days after baseline (Day 0)

Collaboratori e investigatori

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

Sponsor

Collaboratori

Investigatori

  • Cattedra di studio: Gwénaëlle CATHELINE, PhD, Université de Bordeaux - INCIA
  • Investigatore principale: Imad Marc Antoine GHORAYEB, MD, PhD, University Hospital, Bordeaux

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 (Effettivo)

16 settembre 2025

Completamento primario (Stimato)

1 dicembre 2027

Completamento dello studio (Stimato)

1 dicembre 2027

Date di iscrizione allo studio

Primo inviato

13 maggio 2025

Primo inviato che soddisfa i criteri di controllo qualità

23 maggio 2025

Primo Inserito (Effettivo)

3 giugno 2025

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

25 settembre 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

22 settembre 2026

Ultimo verificato

1 settembre 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • CHUBX 2024/68
  • 2024-A02497-40 (Altro identificatore: ANSM)

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

NO

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

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 .