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MYT1L -syndrom: Et sjældent pædiatrisk genetisk syndrom, der er ansvarlig for en neuroudviklingsforstyrrelse (MYT1L)

3. november 2026 opdateret af: University Hospital, Rouen

Karakterisering af sprog- og prosodiforstyrrelser, kognitive funktion og adfærdsproblemer i MYT1L -syndrom

MYT1L syndrome is a rare genetic syndrome, recently described in 2011, with paediatric onset, responsible for a neurodevelopmental disorder combining psychomotor retardation, learning difficulties and/or intellectual development disorders, epilepsy, overweight and eating disorders. The Rouen genetics department is currently positioned as a clinical expert in this disease.

The study published in 2020 by our team (Coursimault J et al., Hum Genet. 2022, PMID: 34748075) has enabled us to describe 40 new individuals worldwide, to gain a better understanding of this disease, to specify the genotype-phenotype relationships and to describe new clinical signs. We were able to confirm the presence of a neurodevelopmental disorder in 100% of patients, which includes: language delay, impaired orality, global and facial hypotonia, prosodic features and behavioural problems. This will be the first study in the world to characterise the neuropsychological, language and prosodic profiles of MYT1L patients.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Although neuropsychological and speech therapy assessment is part of the routine work-up of any patient with a neurodevelopmental disorder, the heterogeneous use of assessment scales has not made it possible to obtain a precise characterisation of the neuropsychological and language profile of patients with MYT1L syndrome in retrospective studies. As a result, it is not possible to establish specific language and behavioural rehabilitation treatments. The aim of the study is to provide substantiated information on language (oral language, speech), prosody (reception and expression) and cognitive-behavioural aspects (global IQ, executive functions, sensory profile, attention, aggression, intolerance to frustration, anxiety). This project proposes to carry out a protocol used in routine care to assess language, prosody, cognitive functions and mood disorders, with the aim of identifying a specific language, prosody, cognitive and behavioural profile of patients with MYT1L syndrome, which could lead to better assessment in the future, screening for disorders and better targeting of rehabilitation in future patients, and to identify profiles suggestive of MYT1L syndrome in patients who have not had genetic confirmation (no variation identified or variation of uncertain significance).

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

45

Fase

  • Ikke anvendelig

Kontakter og lokationer

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

Studiesteder

      • Rouen, Frankrig, 76031
        • University Hospital of Rouen

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

6 år og ældre (Barn, Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

MYT1L Group Patients

  • Minimum age for inclusion: 6 years
  • Maximum age for inclusion: no upper age limit
  • Language: French
  • Consent of parents or legal guardian
  • Social security coverage required

Prosody Group Patients

  • Unaided visual or hearing impairment making assessments impossible
  • Non-French speaking patients
  • Patients with a dual molecular genetic diagnosis also causing a neurodevelopmental disorder
  • Acquired neurological disorder

Exclusion Criteria:

MYT1L Group patients

  • Unaided visual or hearing impairment making assessments impossible
  • Non-French speaking patients
  • Patients with a dual molecular genetic diagnosis also causing a neurodevelopmental disorder
  • Acquired neurological disorder

Prosody Group Patients

  • Patients with molecularly confirmed MYT1L syndrome.
  • Nonverbal patients

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: Ikke-randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: MYT1L Arm
  • Neuropsychological assessment by the neuropsychologist (lasting 1h30)
  • Speech and language assessment (including language and prosody) by the speech therapist, lasting 1h30
Aktiv komparator: Control Arm

Consisting of verbally communicative patients with another genetically determinded neurodevelopmental disorder that has been confirmed at the molecular level.

Evaluation de la prosodie par l'orthophoniste (45 minutes)

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Speech-language profile
Tidsramme: At enrollment visit

Evaluation of the neuropsychological profile during an interview with the neuropsychologist allowing the administration of standardized tests completed with the patient and through questionnaires completed by the family

At enrollment visit

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Speech-language profile
Tidsramme: At enrollment visit

Assessment of the language profile through standardized tests completed with the patient during the interview with the speech therapist and questionnaires completed by the family

At enrollment visit
Prosodic speech therapy profile (patients with MYT1L syndrome)
Tidsramme: At enrollment visit

Evaluation of the prosodic profile of patients with MYT1L syndrome by voice recordings

At enrollment visit
Prosodic speech therapy profile (patients with a molecular diagnosis other than MYT1L)
Tidsramme: At enrollment visit

Evaluation of the prosodic profile of patients with a molecular diagnosis other than MYT1L by voice recordings

At enrollment visit

Samarbejdspartnere og efterforskere

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

Sponsor

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 (Faktiske)

4. februar 2025

Primær færdiggørelse (Faktiske)

20. marts 2026

Studieafslutning (Faktiske)

20. marts 2026

Datoer for studieregistrering

Først indsendt

28. maj 2025

Først indsendt, der opfyldte QC-kriterier

28. maj 2025

Først opslået (Faktiske)

6. juni 2025

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

4. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

3. november 2026

Sidst verificeret

1. juni 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 2024/0255/HP
  • 2024-A02492-45 (Anden identifikator: ANSM)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

The data provided will be the property of the sponsor and will be used solely for its own research activities.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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