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Un estudio sobre los niveles de anticuerpos y biomarcadores en la sangre en personas con enfermedad de Pompe de aparición tardía

5 de noviembre de 2026 actualizado por: Astellas Gene Therapies

Un estudio para evaluar la seroprevalencia de anticuerpos contra AAV8 y la evaluación de biomarcadores en pacientes con enfermedad de Pompe de aparición tardía

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.

Descripción general del estudio

Estado

Activo, no reclutando

Condiciones

Intervención / Tratamiento

Descripción detallada

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.

Tipo de estudio

Intervencionista

Inscripción (Actual)

119

Fase

  • No aplica

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Ubicaciones de estudio

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

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

16 años a 69 años (Niño, Adulto, Adulto Mayor)

Acepta Voluntarios Saludables

No

Géneros elegibles para el estudio

Todos

Descripción

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.

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Otro
  • Asignación: N / A
  • Modelo Intervencionista: Asignación de un solo grupo
  • Enmascaramiento: Ninguno (etiqueta abierta)

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Otro: Participants with Late-Onset Pompe Disease

Adolescent or adult participants with LOPD.

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

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Occurrence of total antibodies to AAV8
Periodo de tiempo: 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
Periodo de tiempo: Up to 2 years

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

Up to 2 years

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Seroconversion of antibodies to AAV8 over time
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: Up to 2 years

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

Up to 2 years

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

Investigadores

  • Director de estudio: Medical Director, Astellas Gene Therapies

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio (Actual)

1 de febrero de 2024

Finalización primaria (Estimado)

30 de junio de 2027

Finalización del estudio (Estimado)

30 de junio de 2027

Fechas de registro del estudio

Enviado por primera vez

21 de noviembre de 2023

Primero enviado que cumplió con los criterios de control de calidad

21 de noviembre de 2023

Publicado por primera vez (Actual)

29 de noviembre de 2023

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

9 de noviembre de 2026

Última actualización enviada que cumplió con los criterios de control de calidad

5 de noviembre de 2026

Última verificación

1 de noviembre de 2026

Más información

Términos relacionados con este estudio

Otros números de identificación del estudio

  • AT845-02

Plan de datos de participantes individuales (IPD)

¿Planea compartir datos de participantes individuales (IPD)?

NO

Descripción del plan IPD

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/.

Información sobre medicamentos y dispositivos, documentos del estudio

Estudia un producto farmacéutico regulado por la FDA de EE. UU.

No

Estudia un producto de dispositivo regulado por la FDA de EE. UU.

No

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .