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Completed

NCT Number: NCT01451879

Observational Study for Subjects With Pompe Disease Undergoing Immune Modulation Therapies

Hypothesis: the effectiveness of treatment of Pompe Disease with rhGAA enzyme replacement therapy (ERT) is limited at least in part because patients develop antibodies against the provided rhGAA enzyme. Treatment with immunomodulatory drugs may dampen or eliminate the anti-rhGAA immune response in patients receiving ERT, thereby allowing for greater ERT efficacy. Studying the immune response to rhGAA may provide valuable insight into the role of the immune system in the effectiveness of ERT for Pompe Disease.

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Key information

Conditions

Pompe Disease Brain Diseases Brain Diseases, Metabolic Brain Diseases, Metabolic, Inborn Carbohydrate Metabolism, Inborn Errors Central Nervous System Diseases Congenital, Hereditary, and Neonatal Diseases and Abnormalities Genetic Diseases, Inborn Glycogen Storage Disease Glycogen Storage Disease Type II Lysosomal Storage Diseases Lysosomal Storage Diseases, Nervous System Metabolic Diseases Metabolism, Inborn Errors Nervous System Diseases Nutritional and Metabolic Diseases

Age range

Up to 65 year

Sex eligibility

All sexes

Study type

Observational

Primary location

University of Florida

Gainesville, Florida, 32610, United States

About this study

The purpose of this research study is to determine the effect(s) of medications that alter the immune system on anti-rhGAA immune response in Pompe patients receiving rhGAA enzyme replacement therapy (ERT). The investigators would also like to determine whether treating Pompe Disease with medications that affect the immune system has any effects on the overall health or disease progression of Pompe.

Subjects will be patients between the ages of 0 months and 65 years who have been diagnosed with Pompe Disease, confirmed by mutational analysis and/or GAA enzyme activity assay.

Subjects will be eligible regardless of whether they have begun enzyme replacement therapy prior to enrollment. All Subjects will receive enzyme replacement therapy as standard of care during the course of the Study, although they may not have begun ERT treatment at the time of enrollment. In addition to ERT, subjects may receive an immunomodulatory regimen as part of their standard of care; this may include rituximab, sirolimus, methotrexate, IVIg or other immunomodulatory agents such as pharmacological chaperone N-butyldeoxynojirimycin (NB-DNJ), alone or in combination, at the discretion of their caregiver(s).

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • patients between the ages of 0 months and 65 years
  • diagnosed with early-onset Pompe Disease, confirmed by mutational analysis and/or GAA enzyme assay
  • eligible regardless of whether they have begun enzyme replacement therapy prior to enrollment
  • all subjects will receive ERT as standard of care during the course of the study, although they may not have begun ERT treatment at the time of enrollment
  • subjects may receive an immunomodulatory regimen as part of their standard of care; this may include rituximab, sirolimus, methotrexate, Gamunex, Hizentra, Zavesca or other immunomodulatory agents, alone or in combination, at the discretion of their caregiver(s)

Exclusion criteria

  • subject is unable to meet the study requirements
  • subjects medical condition contraindicates participation or Study Investigators feel that participation is otherwise not in the subject's best interest
  • subject does not receive ERT treatment

Treatment and study plan

Rituximab

Drug

Clinically prescribed immune modulation regimen dosage determined by local medical provider.

Other names: Rituxan, MabThera, Zytux

miglustat

Drug

Clinically prescribed immune modulation regimen dosage determined by local medical provider.

Other names: Zavesca, N-butyldeoxynojirimaycin, Mulberry extract

Primary outcomes

  1. Anti-rh GAA antibody titers

    Time frame: 52 weeks

    Antibody titer for anti-rh-GAA will be evaluated at baseline and every 4-8 weeks for 52 weeks of participation in the primary study. For subjects who continue participation in the extension study (>52 weeks - 5 years), anti-rh-GAA antibody titers will be evaluated every 12 - 24 weeks.

Secondary outcomes

  1. B-lymphocyte antigen (CD20) level

    Time frame: 52 weeks

    Reports from clinical lab: B-lymphocyte antigen (CD20) will be added to the study record when available every 4-12 weeks during the primary study and every 12 weeks for subjects who participate in the extension study (>52 weeks - 6 years)

Sponsors and collaborators

Lead sponsor

University of Florida

Other

Registry information

Official study title

Effects of Immunomodulation Therapy on Anti-rhGAA Immune Response in Subjects With Pompe Disease Receiving rhGAA Enzyme Replacement Therapy

Important dates

Study start
2008
Primary completion
2017
Study completion
2017
First posted
Oct 14, 2011
Registry last updated
Dec 8, 2017

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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