- ICH GCP
- US-Register für klinische Studien
- Klinische Studie NCT07794137
Study Evaluating the Predictive Value of the Terminal Latency Index (TLI) for Treatment Response in Patients With Anti-MAG Neuropathy (PREDIMAG)
26. August 2026 aktualisiert von: Centre Hospitalier Universitaire de Nice
A Monocentric Retrospective Study Evaluating the Predictive Value of the Terminal Latency Index (TLI) for Treatment Response in Patients With Anti-MAG Neuropathy
"Anti-myelin-associated glycoprotein (anti-MAG) neuropathy is a rare dysimmune peripheral neuropathy, most commonly associated with an IgM monoclonal gammopathy.
Its course is generally slow but may lead to significant functional disability.
Despite therapeutic advances, including rituximab, intravenous immunoglobulins (IVIg), immunochemotherapy, and more recently Bruton tyrosine kinase inhibitors (BTKi), treatment response remains highly variable between patients.
The Terminal Latency Index (TLI), an electrophysiological parameter reflecting distal demyelination, is a recognized diagnostic marker of anti-MAG neuropathy.
However, its potential role as a predictive biomarker of treatment response remains insufficiently studied.
Identifying a simple, reproducible, and readily available biomarker that could predict treatment response would be of major clinical importance for personalized patient management and optimization of therapeutic strategies.
This monocentric retrospective study will analyze clinical, biological, and electrophysiological data from patients with anti-MAG neuropathy followed at Nice University Hospital (CHU de Nice) to assess the predictive value of baseline TLI for clinical response 12 months after treatment initiation."
Studienübersicht
Status
Noch keine Rekrutierung
Bedingungen
Intervention / Behandlung
Studientyp
Beobachtungs
Einschreibung (Geschätzt)
100
Kontakte und Standorte
Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.
Studienkontakt
- Name: Abderhmane Slioui
- Telefonnummer: +33 0492038953
- E-Mail: slioui.a@chu-nice.fr
Studieren Sie die Kontaktsicherung
- Name: Mecheli Cavalli
- Telefonnummer: +33 0492035435
- E-Mail: puma.ar@chu-nice.fr
Studienorte
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Alpes Maritimes
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Nice, Alpes Maritimes, Frankreich, 06000
- Chu De Nice
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Kontakt:
- Angela Puma
- Telefonnummer: +33 0492035435
- E-Mail: puma.ar@chu-nice.fr
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Kontakt:
- Abderhmane de Nice
- Telefonnummer: +33 0492038953
- E-Mail: slioui.a@chu-nice.fr
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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
- Erwachsene
- Älterer Erwachsener
Akzeptiert gesunde Freiwillige
Nein
Probenahmeverfahren
Nicht-Wahrscheinlichkeitsprobe
Studienpopulation
"Adult patients with documented anti-MAG activity-associated neuropathy, followed at the Reference Center for Rare Diseases of the Peripheral Nervous System at Nice University Hospital (CHU de Nice) between January 2005 and July 2025.
Planned number of participants: 100 patients."
Beschreibung
Inclusion Criteria:
- Documented anti-MAG IgM polyneuropathy: positive anti-MAG antibodies, associated with an IgM monoclonal gammopathy, and a compatible clinical phenotype.
- Complete and interpretable baseline ENMG assessment: an initial electroneuromyography (ENMG) examination allowing reliable calculation of the TLI in at least two motor nerves among the right median, ulnar, and common fibular nerves.
- The examination must include the distal motor latency, proximal motor conduction velocity, and compound muscle action potential (CMAP).
- Treatment with at least one established therapeutic strategy: treatment initiated at the center, including intravenous immunoglobulins (IVIg), rituximab, immunochemotherapy, Bruton tyrosine kinase inhibitors (BTKi), and/or symptomatic treatment.
- Available functional clinical assessment: a documented INCAT disability score at two predefined time points: baseline (before treatment initiation) and 12 months (±2 months) after treatment initiation.
- Consent to participate in the study.
Exclusion Criteria:
- Peripheral neuropathy associated with an IgM monoclonal gammopathy, with strictly negative anti-MAG antibody testing or no available anti-MAG antibody measurement.
- Incomplete or uninterpretable ENMG data preventing accurate calculation of the TLI for the nerves of interest (median and ulnar nerves).
- Absence of a formally documented INCAT score at baseline or within the 12-month assessment window.
Studienplan
Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.
Wie ist die Studie aufgebaut?
Designdetails
Kohorten und Interventionen
Gruppe / Kohorte |
Intervention / Behandlung |
|---|---|
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Anti-myelin-associated glycoprotein (anti-MAG) neuropathy
This monocentric retrospective observational study will include 100 patients with anti-myelin-associated glycoprotein (anti-MAG) neuropathy followed at Nice University Hospital (CHU de Nice).
No additional intervention or modification of routine clinical care will be performed.
Clinical, biological, therapeutic, and electrophysiological data will be retrospectively collected from medical records and available archives.
Routinely performed electroneuromyography (ENMG) data will be analyzed, with particular emphasis on the Terminal Latency Index (TLI), calculated from available electrophysiological parameters according to the standard formula.
The predictive value of baseline TLI for clinical response to treatment at 12 months will be assessed.
Treatments received as part of routine care, including rituximab, IVIg, immunochemotherapy, and Bruton tyrosine kinase inhibitors (BTKi), will be recorded.
No treatment will be assigned or modified by the study.
Data will be pseudonymized and ent
|
This monocentric retrospective observational study will include 100 patients with anti-myelin-associated glycoprotein (anti-MAG) neuropathy followed at Nice University Hospital (CHU de Nice).
No additional intervention or modification of routine clinical care will be performed.
Clinical, biological, therapeutic, and electrophysiological data will be retrospectively collected from medical records and available archives.
Routinely performed electroneuromyography (ENMG) data will be analyzed, with particular emphasis on the Terminal Latency Index (TLI), calculated from available electrophysiological parameters according to the standard formula.
The predictive value of baseline TLI for clinical response to treatment at 12 months will be assessed.
Treatments received as part of routine care, including rituximab, IVIg, immunochemotherapy, and Bruton tyrosine kinase inhibitors (BTKi), will be recorded.
No treatment will be assigned or modified by the study.
Data will be pseudonymized and ente
|
Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Favorable Clinical Response at 12 Months (≥1-Point Decrease in INCAT Score)
Zeitfenster: 12 months after treatment initiation
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Clinical response at 12 months, defined as a reduction of at least 1 point in the INCAT disability score from baseline.
This outcome will be used to assess the predictive value of the baseline Terminal Latency Index (TLI) for treatment response in patients with anti-MAG neuropathy.
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12 months after treatment initiation
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Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Predictive performance of TLI according to treatment strategy
Zeitfenster: 12 months after treatment initiation.
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Assessment of the predictive performance of baseline TLI for clinical response at 12 months, stratified according to the treatment strategy received.
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12 months after treatment initiation.
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Correlation between TLI, anti-MAG antibody titer, and INCAT score evolution
Zeitfenster: Baseline to 12 months after treatment initiation
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Assessment of the association between baseline TLI, quantitative anti-MAG antibody titer, and change in the INCAT disability score from baseline to 12 months.
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Baseline to 12 months after treatment initiation
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Optimal TLI threshold for predicting treatment response
Zeitfenster: Baseline to 12 months after treatment initiation
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Determination of the optimal baseline TLI threshold for predicting clinical response at 12 months using Receiver Operating Characteristic (ROC) curve analysis and the Youden index
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Baseline to 12 months after treatment initiation
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Mitarbeiter und Ermittler
Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.
Ermittler
- Hauptermittler: Mecheli Cavalli
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. September 2026
Primärer Abschluss (Geschätzt)
1. September 2026
Studienabschluss (Geschätzt)
31. Dezember 2026
Studienanmeldedaten
Zuerst eingereicht
26. August 2026
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
26. August 2026
Zuerst gepostet (Tatsächlich)
31. August 2026
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
31. August 2026
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
26. August 2026
Zuletzt verifiziert
1. August 2026
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Zusätzliche relevante MeSH-Bedingungen
Andere Studien-ID-Nummern
- 26Neuro05
Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Nein
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
Nein
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