Clinical and Basic Investigations Into Known and Suspected Congenital Disorders of Glycosylation

NCT02089789 | Recruiting

• 2 other identifiers: 14007114-HG-0071
• Study Type: observational
• Target: 200
• Locations: 1 country
• Sites: 1

Brief Summary

Background: \- Proteins, fats, and other molecules are the body s building blocks. Many of these molecules must have sugars, or chains of sugars, attached to work properly. People with congenital disorders of glycosylation (CDGs) cannot attach these sugars or sugar chains properly. A child or adult with a CDG can have symptoms in different parts of the body, including brain, nerves, muscles, liver, and immune system. Researchers want to learn more about these diseases to understand better what is causing the problems. Objective: \- To learn more about CDGs. Eligibility: \- People 1 month to 2 years old may be seen as outpatients or by telehealth. Patients 2-80 years with CDG or suspected to have a CDG may be seen under this protocol as inpatients, outpatients or by teleheath. Design:

• CDG participants may be seen as inpatients, outpatients or by teleheath. Inpatient stays may last 2-5 days.
• They will have:-Medical history and physical exam. They will answer questions about their CDG.
• Blood taken several times. Their skin will be numbed, then a needle will take blood from an arm vein.
• Samples taken of their skin, urine, and maybe stool and spinal fluid.
• Photos taken of their whole body. They can wear underwear and cover their eyes.
• Brain MRI. They will lie on a table that slides in and out of a metal cylinder. The scanner makes loud knocking noises so they can wear earplugs.
• Abdomen ultrasound. Sound waves take images of the body from the outside.
• Hand/wrist X-rays for young patients. They may have a full-body X-ray.
• DEXA bone density scan. Participants will lie on a table under a scanner.
• Echocardiogram and electrocardiogram for heart activity. Pads are stuck on the skin and the electrical activity of the heart is recorded.
• Tests of hearing, thinking, motor skills, and speech.
• Children participants may have tests done under sedation if it will benefit them directly.
• CDG participants may have other procedures during their visit. They may have follow-up visits every year.

Conditions

Congenital Disorders of Glycosylation

Keywords

Thrombosis; Intellectual Disability; Hypotonia; Hypoglycemia; Hypothyroidism; Natural History

Outcome Measures

Primary Outcomes (1)

• Expertise Establishment

  DescriptionTo employ consultations, physical examinations, and medical and genetic histories to establish expertise in these disorders appropriate to advise patients and physicians concerning diagnosis, prognosis, and therapy of CDGs.

  Ongoing

Secondary Outcomes (1)

• Secondary

  Ongoing

Study Arms (1)

CDG

Patients with a suspected CDG based on biochemical tests or a confirmed CDG based on enzymatic or molecular tests will be eligible to enroll in this protocol

Eligibility Criteria

• Age: 1 Month - 80 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Anyone with a congenital disorder of glycosylation

You may qualify if:

• Participants 1 month or older will have been or will be referred to this protocol with a known or suspected CDG. Participants over two years of age will be admitted only if they are medically stable and require admission to the Clinical Center for diagnosis. One or more probands may be admitted to the NIH Clinical Center for investigation as well as carrier family members.
• Some participants will be relatives of patients with known CDG s, and their specimens will be obtained for the purpose of heterozygote testing and to serve as controls to help diagnose the proband. Participants may be seen as inpatients, outpatients or via Telehealth. In some cases, biologic samples may be obtained remotely and sent to the Gahl lab.

You may not qualify if:

• Participants under 1 month of age will not be seen at the NIH Clinical center because care is more readily proffered to older individuals at the Clinical Center.
• Participants over two years of age will not be admitted if they are medically unstable and do not require admission to the Clinical Center for diagnosis.
• Pregnant women and newborns are excluded.

Sponsors & Collaborators

• National Human Genome Research Institute (NHGRI): lead

Study Sites (1)

National Institutes of Health Clinical Center

Bethesda, Maryland, 20892, United States

RECRUITING

Related Links

• NIH Clinical Center Detailed Web Page

MeSH Terms

Conditions

Congenital Disorders of Glycosylation; Thrombosis; Intellectual Disability; Muscle Hypotonia; Hypoglycemia; Hypothyroidism

Condition Hierarchy (Ancestors)

Carbohydrate Metabolism, Inborn Errors; Metabolism, Inborn Errors; Genetic Diseases, Inborn; Congenital, Hereditary, and Neonatal Diseases and Abnormalities; Metabolic Diseases; Nutritional and Metabolic Diseases; Embolism and Thrombosis; Vascular Diseases; Cardiovascular Diseases; Neurobehavioral Manifestations; Neurologic Manifestations; Nervous System Diseases; Signs and Symptoms; Pathological Conditions, Signs and Symptoms; Neurodevelopmental Disorders; Mental Disorders; Neuromuscular Manifestations; Glucose Metabolism Disorders; Thyroid Diseases; Endocrine System Diseases

Study Officials

• Lynne A Wolfe, C.R.N.P.

  National Human Genome Research Institute (NHGRI)

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Lynne A Wolfe, C.R.N.P.

CONTACT

(301) 443-8577; lynne.wolfe@nih.gov

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: NIH
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: March 14, 2014
• First Posted: March 18, 2014
• Study Start: March 7, 2014
• Primary Completion (Estimated): December 1, 2030
• Study Completion (Estimated): December 1, 2030
• Last Updated: March 9, 2026

Record last verified: 2025-11-28

Locations

US (1)