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

NCT ID: NCT02089789

Last Updated: 2025-12-26

Basic Information

• Recruitment Status: RECRUITING
• Total Enrollment: 200 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2014-03-07
• Study Completion Date: 2030-12-01

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.

Detailed Description

Study Description:

In this protocol, we propose to characterize the etiology and natural history of known, suspected or secondary CDGs to expand our knowledge about these disorders and provide access to patients of interest for research, teaching, and clinical experience.

Objectives:

The overall aim of this protocol is to advance our knowledge of primary, new, and secondary congenital disorders of glycosylation.

Study Population:

Participants 1 month or older will have been or will be referred to this protocol with a known or suspected CDG though only participants older than 2 years old will be evaluated as inpatients.

Conditions

Congenital Disorders of Glycosylation

Keywords

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

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Study Groups

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

No interventions assigned to this group

Eligibility Criteria

Inclusion Criteria

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.

Exclusion Criteria

• 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.

• Minimum Eligible Age: 1 Month
• Maximum Eligible Age: 80 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

National Human Genome Research Institute (NHGRI)

NIH

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

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

Role: PRINCIPAL_INVESTIGATOR

National Human Genome Research Institute (NHGRI)

Locations

National Institutes of Health Clinical Center

Bethesda, Maryland, United States

Site Status: RECRUITING

Countries

United States

Central Contacts

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

Role: CONTACT

Phone: (301) 443-8577

Email: lynne.wolfe@nih.gov

Facility Contacts

Lynne Wolfe, M.S.

Role: primary

Related Links

https://clinicalstudies.info.nih.gov/cgi/detail.cgi?A_2014-HG-0071.html

NIH Clinical Center Detailed Web Page

Other Identifiers

14-HG-0071

Identifier Type: -

Identifier Source: secondary_id

140071

Identifier Type: -

Identifier Source: org_study_id