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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Could a common supplement help a rare disease? early trial begins
Disease control Recruiting nowThis early-stage trial is testing the safety of a dietary supplement called NMN in 8 people with a rare genetic disorder known as DHDDS-CDG, which affects movement and development. Participants will take 250 mg of NMN daily for 6 months, with an optional 12-month follow-up. The m…
Phase 1 • Sponsor: Eva Morava-Kozicz • Aim: Disease control
Last updated Jun 27, 2026 14:01 UTC
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NIH launches study to unravel mysteries of rare CDG diseases
Knowledge-focused Recruiting nowThis study from the National Human Genome Research Institute aims to better understand Congenital Disorders of Glycosylation (CDG), a group of rare genetic conditions that affect how the body attaches sugars to proteins and fats. Researchers will examine up to 200 participants, i…
Sponsor: National Human Genome Research Institute (NHGRI) • Aim: Knowledge-focused
Last updated Sep 02, 2026 00:00 UTC
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Scientists track rare glycosylation disorders to unlock disease secrets
Knowledge-focused Recruiting nowThis study follows people with congenital disorders of glycosylation (CDG) — rare genetic conditions that affect how the body builds sugar chains on proteins. Researchers aim to track how the disease progresses over time, including its impact on organs and thinking abilities. By …
Sponsor: Icahn School of Medicine at Mount Sinai • Aim: Knowledge-focused
Last updated Jul 23, 2026 00:00 UTC