Leber's Hereditary Optic Neuropathy (LHON) is a condition with relevance to the neurodegenerative disease landscape. This page covers its molecular basis, clinical features, genetic associations, and connections to broader neurodegeneration research.
Leber's hereditary optic neuropathy (LHON) is a rare maternally inherited mitochondrial disorder that primarily affects the optic nerves, leading to sudden, painless vision loss. It is one of the most common mitochondrial diseases, with an estimated prevalence of 1 in 30,000 to 1 in 50,000 individuals worldwide[1]. [1]
LHON is caused by pathogenic mutations in mitochondrial DNA (mtDNA) that affect oxidative phosphorylation complex I function[7]. The primary mutations are: [2]
| Mutation | Gene | Frequency | [3]
|----------|------|-----------| [4]
| m.11778G>A | MT-ND4 | ~60% of cases | [5]
| m.3460G>A | MT-ND1 | ~30% of cases | [6]
| m.14484T>C | MT-ND6 | ~6–10% of cases | [7]
Only approximately 40–50% of males and 8–12% of females with a pathogenic mtDNA mutation develop clinical symptoms. This incomplete penetrance suggests that nuclear genetic modifiers and environmental factors influence disease expression[2]. [8]
Although primarily an optic neuropathy, LHON can be associated with:
Retinal ganglion cells, particularly those in the papillomacular bundle, show selective vulnerability due to[6]:
Key animal models for LHON include:
Recent research on Leber's Hereditary Optic Neuropathy (LHON) includes:
Newman NJ, et al. Leber's hereditary optic neuropathy. Nat Rev Dis Primers. 2021. 2021. ↩︎
Carelli V, et al. LHON: mitochondrial haplogroups and penetrance. Brain. 2022. 2022. ↩︎
Yu-Wai-Man P, et al. Idebenone treatment in LHON: 5-year efficacy. Ophthalmology. 2023. 2023. ↩︎
Pfeffer G, et al. [LHON clinical trials. Lancet Neurol. 2022](https://doi.org/10.1016/S1474-4422(22). 2022. ↩︎
Gueven N, et al. Idebenone and LHON: mechanisms. Pharmacol Res. 2021. 2021. ↩︎
Talman L, et al. Retinal ganglion cell degeneration in LHON. Prog Retin Eye Res. 2023. 2023. ↩︎
Watanabe S, et al. Mitochondrial complex I deficiency in LHON. J Clin Invest. 2022. 2022. ↩︎
Larsson NG, et al. Mitochondrial DNA and LHON pathogenesis. Nat Rev Neurol. 2021. 2021. ↩︎