Determination of CRIM Status and Longitudinal Follow-up of Individuals With Pompe Disease

October 27, 2023 updated by: Duke University

Determination of Cross-Reactive Immunological Material (CRIM) Status and Longitudinal Follow-up of Individuals With Pompe Disease

This is a longitudinal natural history study of Infantile Pompe disease. The investigators will regularly collect and review medical information regarding the diagnosis of Pompe disease, response to enzyme replacement (ERT) using alglucosidase alfa (Lumizyme/Myozyme) and response to immunosuppressive therapy in cases at risk for developing or those who have developed high and sustained antibodies to ERT. To follow the long-term outcomes, we will collect medical records including but not limited to the diagnosis, clinical parameters, assessments for clinical monitoring, and laboratory values including antibody testing results.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

Infantile-onset Pompe disease is an inherited disorder caused by lack of or defect in the enzyme acid alpha-glucosidase (GAA). GAA enzyme deficiency causes glycogen to build up and damage cells throughout the body, especially in the heart and muscles, which is normally diagnosed within the first months of life. Current treatment for Pompe disease involves enzyme replacement therapy (ERT) using the drug alglucosidase alfa (Lumizyme/Myozyme), which provides a form of the GAA enzyme to replace the enzyme that is missing or not working properly in the patient's blood.

In this study, the investigators will learn about the patient's ability to tolerate ERT. Cross-Reactive Immunological Material (CRIM) is a measurement of natural GAA production and an important factor that affects how patients respond to ERT. Children who produce some natural GAA are classified as CRIM-positive, while children who do not produce any natural GAA are classified as CRIM-negative. Children who are CRIM-positive generally tolerate ERT well. But, children who are CRIM-negative, and some children classified as CRIM-positive, have a poor response to ERT due to complications from an immune response against the drug. Treatments are currently being developed to stop this immune response and prevent complications from ERT.

This is a longitudinal natural history study of Infantile Pompe disease. The investigators will regularly collect and review medical information regarding the diagnosis of Pompe disease, response to enzyme replacement (ERT) using alglucosidase alfa (Lumizyme/Myozyme) and response to immunosuppressive therapy in cases at risk for developing or those who have developed high and sustained antibodies to ERT.

The specific aims of this study are:

  1. To correlate CRIM status determined in a blood sample or cultured skin fibroblasts with GAA gene variants that are causing your child's Pompe disease.
  2. To explore the clinical treatment response and natural history of CRIM-positive and CRIM-negative Pompe disease patients with and without immune modulation.
  3. To investigate the role of immune response to treatment (IgG and IgE) including immune phenotyping.

Study Type

Observational

Enrollment (Estimated)

300

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

    • North Carolina
      • Durham, North Carolina, United States, 27710
        • Recruiting
        • Duke University Medical Center
        • Contact:
        • Contact:
        • Principal Investigator:
          • Priya S Kishnani, MD

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

No older than 18 years (Child, Adult)

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Study subjects will be babies/children with a confirmed diagnosis of infantile-onset Pompe disease who are:

  1. seen by the clinical staff of Duke Division of Medical Genetics, or
  2. whose physician or parent contacts the Duke Division of Medical Genetics with the wish to participate in this CRIM research study.

Description

Inclusion Criteria:

  • Confirmed diagnosis of infantile, atypical or juvenile onset Pompe disease
  • Must have a parent or guardian provide written informed consent

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Infantile Pompe disease
Individuals with a confirmed diagnosis of Infantile Pompe disease
This is a longitudinal study focused on the emerging natural history of Infantile Pompe disease, response to ERT using alglucosidase alfa (Myozyme) and response to Immune Tolerance Induction (ITI).

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Clinical response to enzyme replacement therapy (ERT) using alglucosidase alfa (Myozyme)
Time Frame: Up to 18 years
Medical records will be tracked until the patient reaches the age of 18 years to follow clinical response to ERT. This will allow us to gain an understanding of CRIM status in relation to clinical outcomes and development for these subjects.
Up to 18 years

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Response to Immune Tolerance Induction (ITI)
Time Frame: Up to 18 years
Medical records will be tracked until the patient reaches the age of 18 years to follow clinical response to Immune Tolerance Induction (ITI) for patients who are CRIM- or CRIM+ with high antibody titers. This will allow us to increase our understanding of the history of Pompe disease in relation to treatment interventions and the role of high antibody titers in terms of patient outcome in order to develop strategies to ameliorate the immune response and other factors that may affect response to ERT.
Up to 18 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Investigators

  • Principal Investigator: Priya S Kishnani, MD, Duke University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

September 1, 2009

Primary Completion (Estimated)

September 1, 2024

Study Completion (Estimated)

September 1, 2024

Study Registration Dates

First Submitted

August 13, 2012

First Submitted That Met QC Criteria

August 14, 2012

First Posted (Estimated)

August 15, 2012

Study Record Updates

Last Update Posted (Actual)

October 30, 2023

Last Update Submitted That Met QC Criteria

October 27, 2023

Last Verified

October 1, 2023

More Information

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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