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Immunological Signatures of MASLD and MASH in Patients With Type 1 Diabetes (SMASH-IMM1)

3. November 2026 aktualisiert von: Assistance Publique - Hôpitaux de Paris

MASLD and its inflammatory form, MASH, are major public health concerns due to their high prevalence and association with hepatic and cardiovascular morbidity and mortality. Although extensively studied in type 2 diabetes (T2D), their pathophysiology in type 1 diabetes (T1D) remains poorly understood. Given the differences in immune mechanisms between T1D, primarily involving adaptive immunity, and T2D, associated with chronic innate immune activation, MASH may involve distinct immunoinflammatory pathways depending on the type of diabetes. This cross-sectional study aims to identify specific immunological and transcriptomic signatures associated with MASLD/MASH in patients with T1D and compare them with those observed in T2D, ultimately improving understanding of disease mechanisms and hepatic and cardiovascular risk stratification.

Studienübersicht

Status

Noch keine Rekrutierung

Bedingungen

Detaillierte Beschreibung

  • Background : Metabolic dysfunction-associated steatotic liver disease (MASLD) and metabolic dysfunction-associated steatohepatitis (MASH) are associated with liver-related and cardiovascular morbidity. Although these conditions have been extensively investigated in type 2 diabetes (T2D), their immune mechanisms in type 1 diabetes (T1D) remain insufficiently characterized. The differences between the adaptive immune response involved in T1D and the low-grade innate inflammation frequently associated with T2D may result in distinct immunoinflammatory signatures.

  • Objectives :

    • The primary objective is to identify and characterize immunological and transcriptomic signatures associated with MASH in adults living with T1D, by comparing circulating immune-cell profiles according to liver status (no steatosis, MASLD without MASH, or MASH).
    • The secondary objectives include estimating the MASLD/MASH prevalence, identifying associated clinical and metabolic factors, defining inflammatory endotypes, investigating associations with cardiovascular risk and diabetic foot complications, and comparing signatures with existing T2D data from the AngioSafe T2D cohort.
  • Design : This is a multicenter, non-interventiona and cross-sectional observational study, conducted at the diabetology departments of Lariboisière and Bichat hospitals, Assistance Publique-Hôpitaux de Paris (AP-HP), France. Adults living with T1D attending a scheduled day-hospital visit that includes routine FibroScan assessment will be consecutively screened. The T2D comparator consists of previously collected data from participants in the AngioSafe T2D cohort.

  • Procedures : After participant information and verbal non-opposition, clinical, metabolic, biological and hepatic data will be obtained from routine care records. Liver steatosis and stiffness are assessed by transient elastography (FibroScan).

    • An additional 14 mL of peripheral venous blood (two 7 mL EDTA tubes) is collected during the scheduled blood draw, without an additional visit.
    • Samples are transferred to the IMMEDIAB laboratory at Institut Necker Enfants Malades (Paris) for flow cytometry immunophenotyping (FACS), transcriptomic analyses and secure storage.
    • The participation is limited to one day-hospital visit, with no study-specific follow-up.
  • Outcomes and analyses :

    • The primary assessment compares circulating immune-cell immunophenotypic and transcriptomic profiles across liver-status strata.
    • The secondary analyses address inflammatory endotypes, MASLD severity, clinical/biological correlates, cardiovascular and diabetic foot risk indicators, and comparison with T2D. Analyses will include between-group comparisons, multivariable regression adjusted for relevant covariates, dimensionality reduction and differential gene-expression analyses, as specified in the protocol.
  • Study duration : The planned recruitment and overall study period is 24 months. The study was approved by the Comité de protection des personnes Ouest IV on October 5, 2026 (reference 26.02617.000442).

Studientyp

Beobachtungs

Einschreibung (Geschätzt)

1000

Kontakte und Standorte

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

Studienkontakt

Studieren Sie die Kontaktsicherung

Studienorte

      • Paris, Frankreich, 75010
        • Hospital, AP-HP, 2 rue Ambroise Paré, Paris, France (coordinating center) - Department of Diabetology, Bichat Hospital, AP-HP, 46 Rue Henri Huchard, Paris, France
        • Kontakt:
        • Kontakt:

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 und älter (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Alle

Probenahmeverfahren

Nicht-Wahrscheinlichkeitsprobe

Studienpopulation

Study arm: All consecutive adult patients living with type 1 diabetes who attend the day hospital units of the diabetology departments at Lariboisière and Bichat Hospitals (Paris) and undergo liver assessment using FibroScan as part of routine clinical care.

- Control arm: Data from patients living with type 2 diabetes (T2D) who were previously enrolled in the AngioSafe T2D cohort.

Beschreibung

Inclusion Criteria:

  • Male or female subject aged > 18 years;
  • Subject living with type 1 diabetes (T1D) in the study arm, with a FibroScan examination scheduled during a day hospital (DH) visit;
  • Subject living with type 2 diabetes (T2D) who has previously participated in the AngioSafe T2D cohort, in the control arm;
  • Subject who verbally agrees to participate in the study (i.e., expresses no objection), after having been informed and given a reasonable period for consideration.

Exclusion Criteria:

  • Subject with another chronic inflammatory disease (such as psoriasis, sarcoidosis, rheumatoid arthritis, inflammatory bowel disease, etc.);
  • Subject with conditions affecting the immune system (cancer, hematological malignancies, HIV);
  • Subject with an acute biological inflammatory syndrome (CRP > 10 mg/L; leukocyte count > 12 G/L) during the day hospital (DH) visit;
  • Subject who has expressed opposition to participation in the study or to the reuse of their data.

Studienplan

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

Wie ist die Studie aufgebaut?

Designdetails

  • Beobachtungsmodelle: COHORT
  • Zeitperspektiven: PROSPECTIVE

Kohorten und Interventionen

Gruppe / Kohorte
Control arms

Control arms with data from patients living with type 2 diabetes (T2D) who were previously included in the AngioSafe T2D cohort.

Study arm

Study arm comprising all consecutive adult patients living with type 1 diabetes who attend the day hospital units of the diabetology departments at Lariboisière and Bichat Hospitals (Paris), during which they undergo liver assessment using FibroScan as part of routine clinical care.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Comparison of circulating immune-cell subset frequencies according to liver status in patients with type 1 diabetes
Zeitfenster: Baseline (single day-hospital visit).

Frequencies of circulating immune-cell subsets, expressed as percentages of the relevant parent cell population, will be quantified by multiparameter flow cytometry. Measurements will be compared across three liver-status groups defined by FibroScan: no steatosis (CAP < 250 dB/m and liver stiffness < 8 kPa), MASLD without elevated liver stiffness (CAP ≥ 250 dB/m and liver stiffness < 8 kPa), and MASLD with elevated liver stiffness (CAP ≥ 250 dB/m and liver stiffness ≥ 8 kPa).

Baseline (single day-hospital visit).
Comparison of circulating immune-cell gene expression profiles according to liver status in patients with type 1 diabetes
Zeitfenster: Baseline (single day-hospital visit)

Transcriptomic profiles of circulating immune cells will be assessed using gene expression analysis. Differential gene expression between liver-status groups will be evaluated using normalized gene expression measurements and statistical analyses, as specified in the study protocol.

Baseline (single day-hospital visit)

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Identification and characterization of inflammatory endotypes in patients with type 1 diabetes
Zeitfenster: Baseline (single day-hospital visit)

To identify and characterize distinct inflammatory endotypes in patients with type 1 diabetes based on flow cytometry (FACS) data

Baseline (single day-hospital visit)
Association between inflammatory profiles, inflammatory endotypes, and MASLD severity
Zeitfenster: Baseline (single day-hospital visit)

Analyze variations in inflammatory profiles across these endotypes and their association with the development of MASLD, using flow cytometry (FACS) of biological data.

FibroScan: no steatosis (CAP < 250 dB/m and liver stiffness < 8 kPa), MASLD without elevated liver stiffness (CAP ≥ 250 dB/m and liver stiffness < 8 kPa), and MASLD with elevated liver stiffness (CAP ≥ 250 dB/m and liver stiffness ≥ 8 kPa).

Baseline (single day-hospital visit)
Association between hepatic status, inflammatory endotypes, and cardiovascular risk
Zeitfenster: day 1, (single day-hospital visit)

To investigate the association between hepatic status, as previously defined, inflammatory endotypes, and cardiovascular risk assessed using validated clinical cardiovascular risk prediction scores and the coronary artery calcium score, a marker of coronary atherosclerotic burden. Higher scores indicate greater cardiovascular risk.

day 1, (single day-hospital visit)
Association between hepatic status, inflammatory endotypes, and diabetic foot ulcer risk
Zeitfenster: Day 1, (single day-hospital visit)

To investigate the association between hepatic status, as previously defined, inflammatory endotypes, and diabetic foot ulcer risk, assessed using standard clinical grading systems incorporating peripheral neuropathy, lower limb peripheral arterial disease, foot deformities, and history of previous ulcers or amputations.

Day 1, (single day-hospital visit)
Comparison of inflammatory signatures between type 1 and type 2 diabetes
Zeitfenster: Day 1, (single day-hospital visit)

To compare inflammatory signatures associated with MASLD/MASH in patients with type 1 diabetes with those observed in patients with type 2 diabetes, using data from the existing AngioSafe T2D cohort.

Day 1, (single day-hospital visit)
Prevalence of MASLD and MASH in patients with type 1 diabetes
Zeitfenster: Day 1, (single day-hospital visit)

To estimate the prevalence of MASLD and MASH among patients with type 1 diabetes in the study population.

Day 1, (single day-hospital visit)
Risk factors associated with MASLD and MASH in patients with type 1 diabetes
Zeitfenster: Day 1, (single day-hospital visit)

To identify clinical, biological, and metabolic risk factors associated with the development of MASLD and MASH in patients with type 1 diabetes.

Day 1, (single day-hospital visit)
Clinical and demographic characteristics of patients with type 1 diabetes according to hepatic status
Zeitfenster: Day 1, (single day-hospital visit)

To describe the clinical and demographic characteristics of patients with type 1 diabetes according to their hepatic status, assessed by FibroScan, using the following categories:

  • No steatosis: CAP < 250 dB/m and liver stiffness < 8 kPa.
  • MASLD without elevated liver stiffness: CAP ≥ 250 dB/m and liver stiffness < 8 kPa.
  • MASLD with elevated liver stiffness: CAP ≥ 250 dB/m and liver stiffness ≥ 8 kPa.
Day 1, (single day-hospital visit)

Mitarbeiter und Ermittler

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

Sponsor

Mitarbeiter

Publikationen und hilfreiche Links

Die Bereitstellung dieser Publikationen erfolgt freiwillig durch die für die Eingabe von Informationen über die Studie verantwortliche Person. Diese können sich auf alles beziehen, was mit dem Studium zu tun hat.

Allgemeine Veröffentlichungen

  • Ancel , P., Martin, J., Doukbi , E., Houssays, M., Gascon, P., Righini, M., . . . Gaborit , B. (2023). Untargeted Multiomics Approach Coupling Lipidomics and Metabolomics Profiling Reveals New Insights in Diabetic Retinopathy. Int J Mol Sci, 24(15), 12053. doi:10.3390/ijms241512053 De Vries , M., Westerink, J., H A H Kaasjager, K., & W de Valk, H. (2020). Prevalence of Nonalcoholic Fatty Liver Disease (NAFLD) in Patients With Type 1 Diabetes Mellitus: A Systematic Review and Meta-Analysis. J Clin Endocrinol Metab, 105(12), 3842-3853. doi:10.1210/clinem/dgaa575 De Vries, M., Westerink, J., H.A.H Kaasjager, K., & W. de Valk, H. (2020). Prevalence of non-alcoholic fatty liver disease (NAFLD) and its association with surrogate markers of insulin resistance in patients with type 1 diabetes. The Journal of Clinical Endocrinology & Metabolism, 105(12), 3842-3853. doi:10.1016/j.diabres.2022.109827 European Association for the Study of the Liver, (., European Association for the Study of Diabetes, (., & European Association for the Study of Obesity, (. (2024). EASL-EASD-EASO Clinical Practice Guidelines on the management of metabolic dysfunction-associated steatotic liver disease (MASLD). J Hepatol, 81(3), 492-542. doi:10.1016/j.jhep.2024.04.031 Gaborit, B., Julla , J.-B., Besbes, S., Proust , M., Vincentelli, C., Alos, B., . . . Germain, S. (2020). Glucagon-like Peptide 1 Receptor Agonists, Diabetic Retinopathy and Angiogenesis: The AngioSafe Type 2 Diabetes Study. J Clin Endocrinol Metab, 105(4), dgz069. doi:10.1210/clinem/dgz069 Goto , H., & Takamura, T. (2025). Metabolic Dysfunction-Associated Steatotic Liver Disease Complicated by Diabetes: Pathophysiology and Emerging Therapies. J Obes Metab Syndr, 34(3), 224-238. doi:10.7570/jomes25017 M Younossi, Z., Kalligeros, M., & Henry, L. (2024). Epidemiology of metabolic dysfunction-associated steatotic liver disease. Clin Mol Hepatol, 31(Suppl), S32-S50. doi:10.3350/cmh.2024.0431 Mertens , J., Weyler, J., Dirinck, E.,

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)

31. Dezember 2028

Studienabschluss (Geschätzt)

31. Dezember 2028

Studienanmeldedaten

Zuerst eingereicht

23. Oktober 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

3. November 2026

Zuerst gepostet (Tatsächlich)

10. November 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

10. November 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

3. November 2026

Zuletzt verifiziert

1. November 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • APHP 260861

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Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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