Congenital disorder of glycosylation
MONDO:0015286Congenital disorder of glycosylation (CDG) is a fast growing group of inborn errors of metabolism characterized by defective activity of enzymes that participate in glycosylation (modification of proteins and other macromolecules by adding and processing of oligosaccharide side chains). CDG is comprised of phenotypically diverse disorders affecting multiple systems including the central nervous system, muscle function, immunity, endocrine system, and coagulation. The numerous entities in this group are subdivided, based on the synthetic pathway affected, into disorder of protein N-glycosylation, disorder of protein O-glycosylation, disorder of multiple glycosylation, and disorder of glycosphingolipid and glycosylphosphatidylinositol anchor glycosylation.
Also known as: CDG, carbohydrate deficient glycoprotein syndrome, carbohydrate-deficient glycoprotein syndrome, congenital disorder of glycosylation, carbohydrate-deficient glycoprotein syndromes, congenital disorders of glycosylation
35 clinical trials for this condition and its sub-types.
Follow this condition to get notified about new trialsSub-types
Broader categories
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Hope for rare kidney patients: new drug shows promise in phase 3 trial
Disease control CompletedThis study tested a drug called pegcetacoplan in 124 adults and teens with two rare kidney diseases (C3G and IC-MPGN). The goal was to see if the drug could reduce protein in the urine, a sign of kidney damage. Participants received either the drug or a placebo twice a week for 2…
Phase 3 • Sponsor: Apellis Pharmaceuticals, Inc. • Aim: Disease control
Last updated Jun 27, 2026 09:00 UTC
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New hope for rare disease: experimental drug targets PMM2-CDG
Disease control CompletedThis study tested an experimental drug called GLM101 in 27 people with PMM2-CDG, a rare genetic condition that causes problems with balance and movement. Participants received different doses of the drug intravenously over 24 weeks. The main goal was to see if the drug improves c…
Phase 2 • Sponsor: Glycomine, Inc. • Aim: Disease control
Last updated Jun 27, 2026 08:04 UTC
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Could a daily sugar dose help kids with rare CDG?
Disease control CompletedThis study looked at whether taking simple sugars as a daily supplement can improve health in children with congenital disorders of glycosylation (CDG), a rare genetic condition. Twenty participants took the supplement while researchers tracked growth, blood sugar, liver function…
Sponsor: Mayo Clinic • Aim: Disease control
Last updated Jun 27, 2026 07:52 UTC
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New metabolomic test could spot rare metabolic diseases faster
Diagnosis CompletedThis study tested a new method called global metabolomic profiling to diagnose inborn errors of metabolism, a group of rare genetic disorders. Researchers compared this approach to traditional testing in 240 participants. The goal was to see if the new method could more accuratel…
Sponsor: Mayo Clinic • Aim: Diagnosis
Last updated Jun 27, 2026 07:53 UTC
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Scientists track rare muscle disease to unlock its secrets
Knowledge-focused CompletedThis study followed 78 people with GNE myopathy, a rare genetic disease that causes progressive muscle weakness starting in young adulthood. Researchers collected medical history, blood samples, and muscle function tests over up to two years to understand how the disease progress…
Sponsor: National Human Genome Research Institute (NHGRI) • Aim: Knowledge-focused
Last updated Sep 02, 2026 00:00 UTC
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Scientists track severe allergies to uncover hidden patterns
Knowledge-focused CompletedThis completed study followed 945 people, mostly children and young adults with severe eczema or related allergic conditions, along with their relatives. Researchers observed how these diseases progress over up to a year, using tests like allergy skin pricks, blood draws, and lun…
Sponsor: National Institute of Allergy and Infectious Diseases (NIAID) • Aim: Knowledge-focused
Last updated Aug 28, 2026 00:00 UTC
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Can a global patient registry unlock the secrets of a rare muscle disease?
Knowledge-focused CompletedThis study is building an international registry of people with GNE myopathy, an ultra-rare muscle disease that causes progressive weakness and often leads to wheelchair use. Participants will complete online questionnaires about their symptoms, medical history, quality of life, …
Sponsor: Newcastle University • Aim: Knowledge-focused
Last updated Aug 19, 2026 00:00 UTC
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Researchers track rare disease PMM2-CDG to unlock clues for future treatments
Knowledge-focused CompletedThis study is gathering medical information from 120 people with PMM2-CDG, a rare genetic disorder. Researchers will track growth, organ function, and development over time. The goal is to better understand the disease and help design future treatments. No new drugs are being tes…
Sponsor: Glycomine, Inc. • Aim: Knowledge-focused
Last updated Jul 10, 2026 00:00 UTC
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Tiny study probes why CDG patients have Stroke-Like events
Knowledge-focused CompletedThis study looked at how the cells lining blood vessels (endothelial cells) might be involved in stroke-like episodes in people with Congenital Disorders of Glycosylation (CDG). Researchers took blood samples from 6 CDG patients and grew their endothelial cells in the lab to test…
Sponsor: Assistance Publique - Hôpitaux de Paris • Aim: Knowledge-focused
Last updated Jun 27, 2026 12:04 UTC
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Rare disease clotting mystery probed in 57 patients
Knowledge-focused CompletedThis study examined blood clotting in 57 people with Congenital Disorder of Glycosylation (CDG), a rare genetic condition. Researchers used a special test called the thrombin generation assay to see if the body's clotting system stays balanced despite having low levels of both cl…
Sponsor: Assistance Publique - Hôpitaux de Paris • Aim: Knowledge-focused
Last updated Jun 27, 2026 09:10 UTC
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New study tracks muscle decline in rare disease to guide future treatments
Knowledge-focused CompletedThis study followed 52 people with limb-girdle muscular dystrophy 2I (LGMD2I) for up to two years to learn more about how the disease changes over time. Researchers measured walking ability, muscle strength, heart function, and daily activities. The goal was to better understand …
Sponsor: Genethon • Aim: Knowledge-focused
Last updated Jun 27, 2026 09:04 UTC