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En undersøgelse om antistofniveauer og biomarkører i blodet hos mennesker med sent opstået Pompes sygdom

5. november 2026 opdateret af: Astellas Gene Therapies

En undersøgelse til evaluering af seroprevalens af antistoffer mod AAV8 og vurdering af biomarkører hos patienter med sent opstået Pompe-sygdom

Pompe disease is a genetic condition which causes muscle weakness over time. People with Pompe disease have a faulty gene that makes an enzyme called acid alpha-glucosidase (or GAA). This enzyme breaks down a type of sugar called glycogen. Without this enzyme, there is a build-up of glycogen in the cells of the body. This causes muscle weakness and other symptoms. Pompe disease can happen at any age, but in late-onset Pompe disease, symptoms generally start from 12 months old onwards.

The standard treatment for people with Pompe disease is to receive regular infusions of the GAA enzyme. This is known as enzyme replacement therapy. However, people can build up antibodies against the GAA enzyme over time.

Gene therapy is used to treat conditions caused by a faulty gene. It works by replacing the faulty gene with a working gene inside the cells of the body. The working gene is delivered into the cells using certain viruses as carriers (vectors). Viruses are often used as carriers as they can easily get inside cells. The genetic material of the original virus is replaced with the working gene, so only the working gene gets inside the cells. A common virus used as a carrier in gene therapy is the adeno-associated virus (or AAV). This is like an adenovirus, which causes the common cold.

The original type of AAV does not cause any harm to humans. However, people that have previously been infected with the original type of AAV may have built up antibodies against AAV. These antibodies may stop the AAV carrier with the working gene getting inside the cells.

Researchers want to learn more about antibody levels against AAV and the GAA enzyme in people with late-onset Pompe disease. They also want to learn about other substances in the blood that provide more information about late-onset Pompe disease. These are known as biomarkers.

In this study, older teenagers and adults with late-onset Pompe disease will take part. They will not have had gene therapy using AAV. There will be 2 groups - those who have never had enzyme replacement therapy, and those who have had enzyme replacement therapy for 6 months or more. No study treatment will be given during the study, but blood and urine samples will be taken for testing.

The main aims of the study are to check antibody levels against AAV8 (a type of AAV) in people with late-onset Pompe disease who had not received any treatment using AAV, to check antibody levels against the GAA enzyme in people previously treated with GAA as part of enzyme replacement therapy, to check levels of biomarkers for Pompe disease, and to check for medical problems.

In the study, people will visit the study clinic several times. Some visits may be in the person's home. The first visit is to check if they can take part. Those who can take part will have a medical examination, and have their vital signs checked. Vital signs include blood pressure, heart rate, breathing rate and temperature. Blood samples will be taken to check antibody levels against the GAA enzyme and against AAV8. Blood and urine samples will also be taken to check for biomarkers for Pompe disease. Blood and urine samples will be taken about every 4 months for up to 2 years.

Studieoversigt

Status

Aktiv, ikke rekrutterende

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

No investigational drug will be administered to participants in this study. Blood and urine will be collected as part of the study. The duration of the study is approximately 2 years, participants may withdraw at any time.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

119

Fase

  • Ikke anvendelig

Kontakter og lokationer

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

Studiesteder

      • Adelaide, Australien
        • AU61003
      • Herston, Australien
        • AU61001
      • Flamengo, Brasilien
        • BR55003
      • Porto Alegre, Brasilien
        • BR55002
      • São Paulo, Brasilien
        • BR55001
      • Edmonton, Canada
        • CN15003
      • Montreal, Canada
        • CA15001
      • Cambridge, Det Forenede Kongerige
        • UK44003
      • Newcastle upon Tyne, Det Forenede Kongerige
        • UK44001
      • Salford, Det Forenede Kongerige
        • UK44004
    • Georgia
      • Atlanta, Georgia, Forenede Stater, 30322
        • Emory Clinic
    • Kansas
      • Kansas City, Kansas, Forenede Stater, 66160
        • University of Kansas Medical Center
    • Michigan
      • Ann Arbor, Michigan, Forenede Stater, 48109
        • University of Michigan
    • Minnesota
      • Minneapolis, Minnesota, Forenede Stater, 55404
        • Children's Hospitals and Clinics of Minnesota
    • New Jersey
      • Hackensack, New Jersey, Forenede Stater, 07601
        • Hackensack University Medical Center
    • Ohio
      • Cincinnati, Ohio, Forenede Stater, 45221
        • University of Cincinnati
    • Pennsylvania
      • Philadelphia, Pennsylvania, Forenede Stater, 19104
        • University of Pennsylvania
      • Pittsburgh, Pennsylvania, Forenede Stater, 15213
        • University of Pittsburgh Medical Center
    • Utah
      • Salt Lake City, Utah, Forenede Stater, 84132
        • University of UTAH - PPDS
    • Virginia
      • Fairfax, Virginia, Forenede Stater, 22030
        • Lysosomal and Rare Diseases Research and Treatment Center, Inc.
      • Angers, Frankrig
        • FR33006
      • Garches, Frankrig
        • FR33009
      • Lille, Frankrig
        • FR33005
      • Limoges, Frankrig
        • FR33007
      • Marseille, Frankrig
        • FR33002
      • Nantes, Frankrig
        • FR33003
      • Nice, Frankrig
        • FR33004
      • Strasbourg, Frankrig
        • FR33001
      • Florence, Italien
        • IT39002
      • Gussago, Italien
        • IT39005
      • Messina, Italien
        • IT39012
      • Milan, Italien
        • IT39009
      • Milan, Italien
        • IT39011
      • Pavia, Italien
        • IT39008
      • Pisa, Italien
        • IT39006
      • Roma, Italien
        • IT39004
      • Udine, Italien
        • IT39003
      • Kodaira-Shi, Japan
        • National Center of Neurology and Psychiatry
      • Shinjuku-Ku, Japan
        • Tokyo Women's Medical University Hospital
      • Albacete, Spanien
        • ES34003
      • Barcelona, Spanien
        • ES34004
      • Donostia / San Sebastian, Spanien
        • ES34009
      • L'Hospitalet de Llobregat, Spanien
        • ES34007
      • Madrid, Spanien
        • ES34001
      • Madrid, Spanien
        • ES34005
      • Valencia, Spanien
        • ES34002
      • Taipei, Taiwan
        • TW88601
      • Taipei, Taiwan
        • TW88602
      • Taoyuan City, Taiwan
        • TW88603
      • Bonn, Tyskland
        • DT49005
      • Essen, Tyskland
        • DT49004
      • Höchheim, Tyskland
        • DT49003
      • Münster, Tyskland
        • DT49006

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

16 år til 69 år (Barn, Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Participant has a documented clinical diagnosis of LOPD.
  • Participant is enzyme replacement therapy ERT-naïve (ERT-N) or if the participant is currently taking an approved ERT treatment or is participating in an ERT-interventional study, the ERT must have been received for at least 6 months or more (ERT-experienced [ERT-E]).
  • Participant is willing and able to comply with study visits and procedures.
  • Participant agrees to not start participating in any other clinical study involving an investigational study treatment, including ERT, while participating in this study.

Exclusion Criteria:

  • Participant previously received an AAV-related product (any serotype).
  • Participant is currently participating in a Pompe-related interventional study (other than ERT-interventional studies) or has received gene or cell therapy.
  • Participant requires any invasive or noninvasive ventilation support while awake and upright (non-invasive support while sleeping with either continuous positive airway pressure (CPAP) or bilevel positive airway pressure (BiPAP) is acceptable for eligibility).
  • Participant is unable to ambulate (assistive devices [e.g., cane or walker] are acceptable for eligibility).
  • Participants who have received any ERT for less than 6 months as of the Baseline visit are not eligible.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Andet
  • Tildeling: N/A
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Andet: Participants with Late-Onset Pompe Disease

Adolescent or adult participants with LOPD.

No investigational drug will be administered to participants in this study.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Occurrence of total antibodies to AAV8
Tidsramme: Up to 2 years

Antibodies to AAV8 will be recorded from serum blood samples collected.

Up to 2 years
Occurrence of neutralizing antibodies to AAV8
Tidsramme: Up to 2 years

Antibodies to AAV8 will be recorded from serum blood samples collected.

Up to 2 years

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Seroconversion of antibodies to AAV8 over time
Tidsramme: Up to 2 years

Seroconversion of antibodies to AAV8 will be recorded from serum blood samples collected.

Up to 2 years
Creatine kinase [CK] levels
Tidsramme: Up to 2 years

CK levels will be recorded from blood plasma samples collected.

Up to 2 years
Urine glucose tetrasaccharide [Glc4]/hexose tetrasaccharide [Hex4] over time
Tidsramme: Up to 2 years

Glc4/Hex4 will be recorded from urine samples collected.

Up to 2 years
Occurrence of anti-GAA antibodies in participants on ERT
Tidsramme: Up to 2 years

Anti-GAA antibodies will be recorded from serum blood samples collected.

Up to 2 years

Samarbejdspartnere og efterforskere

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

Sponsor

Efterforskere

  • Studieleder: Medical Director, Astellas Gene Therapies

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)

1. februar 2024

Primær færdiggørelse (Anslået)

30. juni 2027

Studieafslutning (Anslået)

30. juni 2027

Datoer for studieregistrering

Først indsendt

21. november 2023

Først indsendt, der opfyldte QC-kriterier

21. november 2023

Først opslået (Faktiske)

29. november 2023

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

9. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

5. november 2026

Sidst verificeret

1. november 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • AT845-02

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

Access to anonymized individual participant level data will not be provided for this trial. Further details on Astellas' data sharing policy can be found at https://www.clinicaltrials.astellas.com/transparency/.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .