Prospective Collection of Biospecimen in Pediatric Patients and Adult Guardians Diagnosed With Glycogen Storage Disease Type 1B (GSD1b)

Study Overview
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Brief Summary
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The primary objective of this study is to collect whole blood from patients diagnosed with Glycogen storage disease type 1B, which will be used to support the investigation of potential therapies that address the genetic basis of this disease.

Official Title
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Prospective Collection of Biospecimen in Pediatric Patients and Adult Guardians Diagnosed With Glycogen Storage Disease Type 1B (GSD1b)

Conditions
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Glycogen Storage Disease Type IB

Intervention / Treatment
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* Diagnostic Test: Specimen Donation


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Subjects ages 4-85 Subjects that are diagnosed with Glycogen Storage Disease Type Ib (GSD1b, von Gierke disease) Subjects who are G339C Homozygous or L348FS Homozygous or G339C/ L348FS heterozygous or are the biological parent of subjects diagnosed with Glycogen Storage Disease Type Ib (GSD1b, von Gierke disease) and are a biological parent of a subject in Cohort 1 (G339C homozygous) or Cohort 2 (L348FS homozygous) Subjects or guardians must be willing and able to provide appropriate photo identification to mobile phlebotomist during at-home visit for verification of identity Subjects and/or Guardians must be willing and able to provide appropriate written informed consent and/or assent, as applicable Exclusion Criteria: Subjects will be excluded if they experienced excess blood loss, including blood donation defined as 250 mL in the last month or 500 mL in the last two months. For subjects in the pediatric population, subjects will be excluded if they experienced excess blood loss, including blood donation defined as 3 mL/kg or up to 50 mL in the last 8-weeks. For requests that do not include pregnant subjects, subjects will be excluded if they are pregnant or nursing. For requests that do not include subjects with infectious diseases, subjects will be excluded if they have current, active HIV, hepatitis or other infectious diseases (self-reported or medical history reviewed). Subjects will be excluded if they have taken an investigational product in the last 30 days.

Ages Eligible for Study
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Minimum Age: 4 Years
Maximum Age: 85 Years

Sexes Eligible for Study
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All

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| GSD1b G339C Homozygous (n=3)<br> | Diagnostic Test: Specimen Donation<br>* blood donation<br>|
| GSD1b L348FS Homozygous (n=3)<br> | Diagnostic Test: Specimen Donation<br>* blood donation<br>|
| GSD1b G339C/ L348FS Heterozygous (n=3)<br> | Diagnostic Test: Specimen Donation<br>* blood donation<br>|
| GSD1b Parents (n=6)<br> | Diagnostic Test: Specimen Donation<br>* blood donation<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Bipspecimen collection from subjects that are diagnosed with Glycogen Storage Disease Type Ib (GSD1b, von Gierke disease); Subjects that are the biological parent of subjects diagnosed with Glycogen Storage Disease Type Ib (GSD1b, von Gierke disease) | Bipspecimen collection from subjects or their parental guardians that are diagnosed with Glycogen Storage Disease Type Ib(GSD1b, von Gierke disease) for the purpose to analyze the biospecimens to support the investigation of potential therapies that address the genetic basis of this disease. The primary outcome measure is the collection of biospecimens for quantitative analysis using PBMC processes to report cell viability of at least 5M cells per vial. | 1 Year |