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
36 clinical trials for this condition and its sub-types, 7 tagged with Congenital disorder of glycosylation itself.
Follow this condition to get notified about new trialsWhere it sits in the disease tree
Browse by category →Sub-types of Congenital disorder of glycosylation
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Disorder of protein O-glycosylation 0 trials · 13 incl. sub-types
6 sub-types
- Myopathy caused by variation in FKRP 0 trials · 8 incl. sub-types Sub-types →
- Qualitative or quantitative defects of protein involved in O-glycosylation of alpha-dystroglycan 0 trials · 8 incl. sub-types Sub-types →
- Disorder of fucoglycosan synthesis 0 trials · 4 incl. sub-types Sub-types →
- Autosomal recessive limb-girdle muscular dystrophy type 2R1 1 trial
- Myopathy caused by variation in POMGNT1 0 trials · 1 incl. sub-types Sub-types →
- Myopathy caused by variation in POMGNT2 0 trials Sub-types →
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Disorder of multiple glycosylation 0 trials · 9 incl. sub-types
19 sub-types
- GNE myopathy 3 trials
- Leukocyte adhesion deficiency type II 2 trials
- Reunion island Larsen syndrome 1 trial
- SLC35A2-congenital disorder of glycosylation 1 trial
- Congenital dyserythropoietic anemia type 2 1 trial
- Immunodeficiency 23 1 trial
- B4GALT1-congenital disorder of glycosylation 0 trials
- CCDC115-CDG 0 trials
- DK1-congenital disorder of glycosylation 0 trials
- DPM3-congenital disorder of glycosylation 0 trials Sub-types →
- MPDU1-congenital disorder of glycosylation 0 trials
- SLC35A1-congenital disorder of glycosylation 0 trials
- SRD5A3-congenital disorder of glycosylation 0 trials
- TMEM199-CDG 0 trials
- Congenital disorder of glycosylation type 1E 0 trials
- Congenital muscular dystrophy with intellectual disability and severe epilepsy 0 trials
- Defect in V-ATPase 0 trials
- Defect in conserved oligomeric Golgi complex 0 trials Sub-types →
- Developmental and epileptic encephalopathy, 50 0 trials
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Congenital disorder of glycosylation type I 0 trials · 7 incl. sub-types
28 sub-types
- PMM2-congenital disorder of glycosylation 5 trials
- MPI-congenital disorder of glycosylation 1 trial
- PGM1-congenital disorder of glycosylation 1 trial
- ALG1-congenital disorder of glycosylation 0 trials
- ALG11-congenital disorder of glycosylation 0 trials
- ALG12-congenital disorder of glycosylation 0 trials
- ALG2-congenital disorder of glycosylation 0 trials Sub-types →
- ALG3-congenital disorder of glycosylation 0 trials
- ALG6-congenital disorder of glycosylation 1C 0 trials
- ALG8-congenital disorder of glycosylation 0 trials
- ALG9-congenital disorder of glycosylation 0 trials Sub-types →
- DDOST-congenital disorder of glycosylation 0 trials
- DK1-congenital disorder of glycosylation 0 trials
- DPAGT1-congenital disorder of glycosylation 0 trials
- DPM3-congenital disorder of glycosylation 0 trials Sub-types →
- MPDU1-congenital disorder of glycosylation 0 trials
- RFT1-congenital disorder of glycosylation 0 trials
- SRD5A3-congenital disorder of glycosylation 0 trials
- SSR3-CDG 0 trials
- SSR4-congenital disorder of glycosylation 0 trials
- STT3A-congenital disorder of glycosylation 0 trials
- STT3B-congenital disorder of glycosylation 0 trials
- Congenital disorder of glycosylation type 1E 0 trials
- Congenital disorder of glycosylation, type IAA 0 trials
- Congenital disorder of glycosylation, type ICC 0 trials
- Congenital muscular dystrophy with intellectual disability and severe epilepsy 0 trials
- Developmental and epileptic encephalopathy, 36 0 trials
- Developmental and epileptic encephalopathy, 50 0 trials
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Disorder of protein N-glycosylation 0 trials · 7 incl. sub-types
26 sub-types
- PMM2-congenital disorder of glycosylation 5 trials
- MPI-congenital disorder of glycosylation 1 trial
- PGM1-congenital disorder of glycosylation 1 trial
- ALG1-congenital disorder of glycosylation 0 trials
- ALG11-congenital disorder of glycosylation 0 trials
- ALG12-congenital disorder of glycosylation 0 trials
- ALG2-congenital disorder of glycosylation 0 trials Sub-types →
- ALG3-congenital disorder of glycosylation 0 trials
- ALG6-congenital disorder of glycosylation 1C 0 trials
- ALG8-congenital disorder of glycosylation 0 trials
- ALG9-congenital disorder of glycosylation 0 trials Sub-types →
- DDOST-congenital disorder of glycosylation 0 trials
- DPAGT1-congenital disorder of glycosylation 0 trials
- MAN1B1-congenital disorder of glycosylation 0 trials
- MGAT2-congenital disorder of glycosylation 0 trials
- MOGS-congenital disorder of glycosylation 0 trials
- RFT1-congenital disorder of glycosylation 0 trials
- SLC39A8-CDG 0 trials
- SSR4-congenital disorder of glycosylation 0 trials
- ST3GAL3-congenital disorder of glycosylation 0 trials Sub-types →
- STT3A-congenital disorder of glycosylation 0 trials
- STT3B-congenital disorder of glycosylation 0 trials
- TMEM165-congenital disorder of glycosylation 0 trials
- Autism spectrum disorder - epilepsy - arthrogryposis syndrome 0 trials
- Congenital disorder of glycosylation type 1EE with or without immunodeficiency 0 trials
- Developmental and epileptic encephalopathy, 36 0 trials
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Congenital disorder of glycosylation type II 0 trials · 3 incl. sub-types
26 sub-types
- Leukocyte adhesion deficiency type II 2 trials
- SLC35A2-congenital disorder of glycosylation 1 trial
- B4GALT1-congenital disorder of glycosylation 0 trials
- CCDC115-CDG 0 trials
- COG1-congenital disorder of glycosylation 0 trials
- COG4-congenital disorder of glycosylation 0 trials
- COG5-congenital disorder of glycosylation 0 trials
- COG6-congenital disorder of glycosylation 0 trials
- COG7-congenital disorder of glycosylation 0 trials
- COG8-congenital disorder of glycosylation 0 trials
- MGAT2-congenital disorder of glycosylation 0 trials
- MOGS-congenital disorder of glycosylation 0 trials
- SLC35A1-congenital disorder of glycosylation 0 trials
- SLC39A8-CDG 0 trials
- TMEM165-congenital disorder of glycosylation 0 trials
- TMEM199-CDG 0 trials
- Congenital disorder of glycosylation, type 2v 0 trials
- Congenital disorder of glycosylation, type IIaa 0 trials
- Congenital disorder of glycosylation, type IIbb 0 trials
- Congenital disorder of glycosylation, type IIcc 0 trials
- Congenital disorder of glycosylation, type IIq 0 trials
- Congenital disorder of glycosylation, type IIr 0 trials
- Congenital disorder of glycosylation, type IIw 0 trials
- Congenital disorder of glycosylation, type IIy 0 trials
- Congenital disorder of glycosylation, type IIz 0 trials
- Congenital disorder of glycosylation, type iit 0 trials
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3 sub-types
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2 sub-types
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Larsen-like syndrome, B3GAT3 type 0 trials
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8 sub-types
- CHIME syndrome 0 trials
- GM3 synthase deficiency 0 trials
- Hypercoagulability syndrome due to glycosylphosphatidylinositol deficiency 0 trials
- Hyperphosphatasia-intellectual disability syndrome 0 trials Sub-types →
- Intellectual disability, autosomal recessive 53 0 trials
- Multiple congenital anomalies-hypotonia-seizures syndrome 1 0 trials
- Multiple congenital anomalies-hypotonia-seizures syndrome 2 0 trials
- Multiple congenital anomalies-hypotonia-seizures syndrome 3 0 trials
Most studied deeper sub-types
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Sugar supplement may calm seizures and stomach troubles in rare genetic disease
Disease control Not yet recruitingThis study tests whether a sugar called D-galactose (AVTX-801) can help people with SLC35A2-CDG, a rare inherited disorder that disrupts how the body adds sugar to proteins. The trial enrolls about 10 people of any age who have seizures or chronic digestive issues. Participants r…
Phase 2 • Sponsor: Eva Morava-Kozicz • Aim: Disease control
Last updated Jul 01, 2026 00:00 UTC
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Sugar supplement shows promise for rare disease in new trial
Disease control Not yet recruitingThis phase 2b trial tests AVTX-801, a D-galactose supplement, in 8 adults with PGM1-CDG, a rare genetic disorder affecting sugar metabolism. Participants currently on D-galactose will receive either the study drug or a placebo to see if it reduces disease-related events like low …
Phase 2 • Sponsor: Eva Morava-Kozicz • Aim: Disease control
Last updated Jun 27, 2026 11:01 UTC
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New hope for rare anemias: drug may cut transfusions
Disease control Not yet recruitingThis Phase 2 trial tests the drug luspatercept (Reblozyl) in 45 people with rare inherited anemias that affect red blood cells. The goal is to see if it can reduce the need for blood transfusions in those who depend on them, or raise hemoglobin levels in those who don't. Particip…
Phase 2 • Sponsor: EuroBloodNet Association • Aim: Disease control
Last updated Jun 27, 2026 08:10 UTC
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Large survey aims to uncover hidden pain in restless legs syndrome
Knowledge-focused Not yet recruitingThis study surveys 1,000 adults with Restless Legs Syndrome (RLS) to find out how often pain is part of their symptoms and how it affects their daily lives. Participants fill out an online questionnaire about their medical history, sleep, pain, and quality of life. The goal is to…
Sponsor: University Hospital, Clermont-Ferrand • Aim: Knowledge-focused
Last updated Jul 03, 2026 00:00 UTC