[Long-chain 3-hydroxyacyl CoA dehydrogenase deficiency and choroidal neovascularization]

Area of Science:

• Biochemistry
• Ophthalmology
• Genetics

Background:

• Long-chain 3-hydroxyacyl CoA dehydrogenase (LCHAD) deficiency is a rare genetic disorder affecting mitochondrial fatty acid beta-oxidation.
• Fatty acid oxidation defects can lead to severe, life-threatening conditions, particularly in early life, but dietary management can be effective.
• LCHAD deficiency is uniquely associated with chorioretinopathy, primarily affecting the posterior pole of the eye.

Observation:

• This report details the first documented case of bilateral macular choroidal neovascularization in a patient with LCHAD deficiency.
• One eye exhibited a fibrovascular lesion, while the other showed active neovascularization that was stabilized with photodynamic therapy.
• The specific mechanisms underlying choroidal degeneration in LCHAD deficiency are not fully understood.

Findings:

• The study suggests that oxidative stress from fatty acid metabolism, rather than solely mitochondrial energy deficiency, may be the primary driver of choroidal degeneration in LCHAD deficiency.
• The observed bilateral macular choroidal neovascularization represents a significant ophthalmological manifestation of this metabolic disorder.

Implications:

• Regular ophthalmological monitoring is crucial for patients diagnosed with LCHAD deficiency to detect and manage potential vision-threatening complications.
• Understanding the pathogenesis of LCHAD-associated retinopathy may lead to targeted therapeutic strategies for ocular manifestations of fatty acid oxidation disorders.