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Optic atrophy in association with cobalamin C (cblC) disease
N Patton1, S Beatty, I C Lloyd
1Department of Ophthalmology, Manchester Royal Eye Hospital, Manchester, United Kingdom.
Ophthalmic Genetics
|October 18, 2000
Summary
Cobalamin C (cblC) disease is associated with optic atrophy, impacting vision. Early cobalamin supplementation did not prevent this vision loss in affected individuals.
Area of Science:
- Ophthalmology
- Metabolic disorders
- Genetics
Background:
- Cobalamin C (cblC) deficiency is an inherited metabolic disorder affecting vitamin B12 metabolism.
- Optic neuropathy is a potential, though not fully characterized, manifestation of cblC deficiency.
Observation:
- Three patients diagnosed with cblC disease presented with bilateral optic atrophy and reduced visual acuity.
- Two affected patients were siblings, indicating a potential genetic component.
Findings:
- The study confirms a significant association between cblC disease and the development of optic atrophy.
- Despite early and prenatal cobalamin supplementation in one sibling, optic atrophy still occurred, suggesting treatment limitations.
Implications:
- Optic atrophy is a key clinical feature in cobalamin C disease that warrants careful monitoring.
- Current cobalamin replacement therapy may not be sufficient to prevent optic nerve damage in cblC disease.