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Charakterisierung des kognitiven Profils von Patienten mit Friedreich-Ataxie (CPCAF)

Friedreich's Ataxia (FA) Friedreich's Ataxia is a neurodegenerative disease caused by a homozygous expansion of the GAA triplet repeats of the frataxin gene (FXN). FA usually begins in childhood or adolescence. It affects both boys and girls. At the neurophysiological level, FA is characterised by neuronal loss affecting the dorsal root ganglia, spinal cord and cerebellum. At present, daily exercise is the only way to combat the disease. There is no cure for Friedreich's ataxia. Clinically, FA mainly combines balance, movement coordination, articulation (dysarthria) with cardiac involvement and sometimes diabetes . After a few years of evolution, walking is no longer possible. Recent data ; also indicate disturbances in information processing and cognitive functioning. In short, FA involves adolescents who progressively lose walking, writing and speech for some; however, each patient progresses differently with respect to the disease, and this is the case with respect to motor and cognitive symptoms.

Studienübersicht

Status

Aktiv, nicht rekrutierend

Bedingungen

Detaillierte Beschreibung

The role of behavioural and cognitive assessment in the clinical trial The effectiveness of a treatment is ultimately determined by the elimination of the physiological cause of the disease and the alleviation of the symptoms that patients suffer. However, new treatments rarely eliminate all causes and symptoms of the disease. As long as the effectiveness of a treatment is unknown, it is subtle changes in parameters that decide whether the approach taken is worth pursuing. For a clinical trial which is supposed to evaluate the effectiveness of a treatment for Friedreich's Ataxia, it is therefore necessary to evaluate subtle changes in the functioning of the motor and cognitive system induced by the treatment. For this reason, the project is assembling a battery of tests that quantify the most important aspects of motor, cognitive and speech function in patients with FA. These tests are designed with the specific needs of FA patients in mind, i.e. on the one hand, the tests assess functions that are particularly important in view of the symptoms of Friedreich's disease indicated in the scientific literature, and on the other hand, the psychometric characteristics of the tests are adapted to the general abilities of FA patients. In this respect, it is important to point out that the expansion of the GAA repetition in people with Friedreich's disease varies from 150 to 1,000 triples (compared to 7 to 25 in the rest of the population), and that this large variation in the genotype of FA patients could potentially influence the cognitive profile of the participants. Previous studies have suggested the relationship between the number of repeats of the GAA triplet of the FXN gene and performance in cognitive assessment tests. Specifically, while in FA patients both alleles of the FXN gene contain an unusually high number of GAA repeats, performance in cognitive tests would correlate with the number of GAA repeats in the allele that contains fewer such repeats. Using this test battery, we are therefore able to achieve our main objective, i.e. to characterise the cognitive profile of FA patients as a function of the number of GAA triplet repeats of the FXN gene. Specifically, the test battery will establish whether motor, executive and speech symptoms affect patients differently according to their particular genetic characteristics.

Studientyp

Beobachtungs

Einschreibung (Geschätzt)

70

Kontakte und Standorte

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

Studienorte

      • Paris, Frankreich
        • Hôpital Necker-Enfants Malades

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

13 Jahre und älter (Kind, Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Ja

Studienberechtigte Geschlechter

Alle

Probenahmeverfahren

Nicht-Wahrscheinlichkeitsprobe

Studienpopulation

The study will involve two groups:

  • a group of adolescents and adults symptomatic with FA with a confirmed molecular diagnosis, followed in the genetics department of the Necker Hospital
  • a control group comprising subjects free of any motor or cognitive impairment, recruited from healthy relatives of patients (siblings, cousins, spouses) or for adults, among healthy people who are not related to the patients but who have been made aware of the existence of this research and who would meet the eligibility criteria and consent to participate in the study.

Beschreibung

Inclusion Criteria:

  • Patient group :

Patients aged 13 years or older Patients with FA confirmed by genetic study Compliant patients willing to undergo all tests Enrolled in a social security scheme or beneficiary of such a scheme

Control group :

Subjects aged 13 years or older Genetic characterisation to exclude the presence of alterations in the FXN gene No motor or cognitive impairment Compliant subjects willing to undergo all tests Membership in a social security scheme or beneficiary of such a scheme

Exclusion Criteria:

  • Patient group :

Optic atrophy or decreased visual acuity Opposition of the patient, or of his parents if the patient is a minor, to participation in the study Non compliant patient according to the Investigator's opinion Person subject to a legal protection measure

Control group :

Alteration in the frataxin gene Optic atrophy or decreased visual acuity Opposition of the patient, or of his parents if the patient is a minor, to participation in the study Non-compliant patient in the opinion of the Investigator Person subject to a legal protection measure

Studienplan

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

Wie ist die Studie aufgebaut?

Designdetails

  • Beobachtungsmodelle: CASE_CONTROL
  • Zeitperspektiven: PROSPECTIVE

Kohorten und Interventionen

Gruppe / Kohorte
Control Group

Comprising subjects free of any motor or cognitive impairment, recruited from healthy relatives of patients (siblings, cousins, spouses) or for adults, among healthy people who are not related to the patients but who have been made aware of the existence of this research and who would meet the eligibility criteria and consent to participate in the study. The study will take place in a single session, during a health care consultation, during which the previously selected patients will take the tests included in the battery on a computer dedicated for the study. The total duration of the test is 45 minutes. No further visits will be necessary.

Symptomatic participants

The study will involve a group of adolescents and adults symptomatic with FA with a confirmed molecular diagnosis, followed in the genetics department of the Necker Hospital. The study will take place in a single session, during a health care consultation, during which the previously selected patients will take the tests included in the battery on a computer dedicated for the study. The total duration of the test is 45 minutes. No further visits will be necessary. The validation of the results obtained will be determined by the correlation indices between the cognitive test scores used and the demographic variables and disease parameters considered, in particular the number of GAA triplet repeats in the allele of the FXN gene that contains the fewest repeats.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
characterization of the cognitive profile of patients suffering from Friedreich's Ataxia as a function of the number of GAA triplet repeats in the allele of the FXN gene that contains the least number of repeats.
Zeitfenster: through study completion, an average of 3 years

Correlation of cognitive test scores

through study completion, an average of 3 years

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Characterization of the motor profile of patients with Friedreich's Ataxia according to demographic variables and parameters related to the disease
Zeitfenster: through study completion, an average of 3 years

Correlation of motor test scores with demographic variables demographic variables, disease parameters

through study completion, an average of 3 years
Characterization of the executive profile of patients with Friedreich's Ataxia according to demographic variables and parameters related to the disease
Zeitfenster: through study completion, an average of 3 years

Correlation of scores on tests of executive functions

through study completion, an average of 3 years
Characterization of the speech production profile of patients with Friedreich's Ataxia according to demographic variables and parameters related to the disease
Zeitfenster: through study completion, an average of 3 years

Correlation of speech production assessment test scores with demographic variables, disease-related parameters

through study completion, an average of 3 years
To determine which dimensions of cognitive functioning are affected in patients with Friedreich's Ataxia and to verify the sensitivity of tests aimed at evaluating these dimensions to detect deficits in patients compared to healthy healthy subjects.
Zeitfenster: through study completion, an average of 3 years

Comparison of motor test scores between patients and controls. Comparison of executive function test scores between patients and controls. Comparison of speech evaluation test scores between patients and controls.

through study completion, an average of 3 years

Mitarbeiter und Ermittler

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

Sponsor

Ermittler

  • Hauptermittler: Benoit Funalot, APHP

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 (Tatsächlich)

19. Juni 2023

Primärer Abschluss (Geschätzt)

1. Dezember 2026

Studienabschluss (Geschätzt)

1. Dezember 2026

Studienanmeldedaten

Zuerst eingereicht

7. Februar 2023

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

23. Mai 2023

Zuerst gepostet (Tatsächlich)

24. Mai 2023

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

4. 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

Schlüsselwörter

Andere Studien-ID-Nummern

  • C22-77
  • 2023-A00290-45 (Registrierungskennung: IDRCB)

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

NEIN

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 .