GBE Deficiency (GSD IV and APBD) Natural History Study

Collection and review of clinical information related to glycogen branching enzyme (GBE) deficiency, diagnosed as Glycogen Storage Disease Type IV (GSD IV) or Adult Polyglucosan Body Disease (APBD generated during clinic visits.

Study Overview

• Status: Recruiting
• Conditions: Adult Polyglucosan Body Disease; Glycogen Storage Disease Type IV; GSD4; GSD IV; APBD
• Intervention / Treatment: Other: No intervention

Detailed Description

This natural history study will serve as a repository of clinical, laboratory, and biochemical information on individuals with GBE deficiency, diagnosed as either GSD IV or APBD. This information will allow a more definitive description of GBE deficiency to be developed, which will permit development of treatment strategies for this disease.

Duke will be the only site where this study takes place. However, since this is a rare disorder, participants who receive care for GBE deficiency at other institutions will be included. We will collect retrospective data from patient charts on diagnosed individuals, as far back as necessary to capture the clinical course of the disorder. Prospective data collected from patient charts after enrollment will be captured as well. Participant's medical records will be continually reviewed for the duration of the study.

Data will be collected from medical records and will only pertain to clinically relevant information, including, but not limited to: demographic and diagnostic information, tissue biopsy results, medical and family history, review of systems, imaging studies, results of liver, muscle, and nerve function testing, and urine and blood laboratory results.

• Study Type: Observational
• Enrollment (Anticipated): 200

Contacts and Locations

Study Locations

• United States
  • North Carolina
    • Durham, North Carolina, United States, 27710
      • Recruiting
      • DUKE University Medical Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 1 second to 90 years (Child, Adult, Older Adult)
• Accepts Healthy Volunteers: No

• Sampling Method: Non-Probability Sample

Study Population

All patients with GBE deficiency, diagnosed as GSD IV or APBD, regardless of gender or ethnicity, are eligible for enrollment.

Description

• Diagnosis of GSD IV or APBD via:

  • Two variants in the GBE1 gene
  • Deficient GBE activity in liver, muscle, skin fibroblast or other tissue
  • One variant in GBE1 gene with evidence of disease that is pathogenic, per the clinician
• Able to provide informed consent for self (adults) or affected individual (minor or adults with a legally authorized representative)
• Able to provide consent for release of medical records
• Pregnant women with a diagnosis of GSD IV or APBD will be included
• Histology as confirmed by clinician

Study Plan

How is the study designed?

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Progression of disease	Duration of study, approximately 10 years

Collaborators and Investigators

• Sponsor: Duke University

Study record dates

Study Major Dates

• Study Start: December 1, 2015
• Primary Completion (Anticipated): December 1, 2025
• Study Completion (Anticipated): December 1, 2025

Study Registration Dates

• First Submitted: February 4, 2016
• First Submitted That Met QC Criteria: February 16, 2016
• First Posted (Estimate): February 17, 2016

Study Record Updates

• Last Update Posted (Estimate): May 4, 2023
• Last Update Submitted That Met QC Criteria: May 3, 2023
• Last Verified: May 1, 2023

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Metabolic Diseases; Genetic Diseases, Inborn; Carbohydrate Metabolism, Inborn Errors; Metabolism, Inborn Errors; Glycogen Storage Disease; Glycogen Storage Disease Type IV
• Other Study ID Numbers: Pro00060753

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO