Leber's hereditary optic neuropathy (LHON) is a maternally inherited mitochondrial disorder characterized by acute bilateral vision loss. The pathophysiology involves reactive oxygen species (ROS), which can be affected by medications. This article reviews the evidence for medications with demonstrated and theoretical effects on mitochondrial function, specifically in relation to increased ROS production. The data reviewed provides guidance when selecting medications for individuals with LHON mutations (carriers) and are susceptible to conversion to affected. However, as with all medications, the proven benefits of these therapies must be weighed against, in some cases, purely theoretical risks for this unique patient population.
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http://dx.doi.org/10.1016/j.mito.2018.07.007 | DOI Listing |
J Neuroophthalmol
December 2024
Exploration de la Vision et Neuro-Ophtalmologie (RF, VS), CHU de Lille, Lille, France; and University of Lille (QL, VS, MB), INSERM, CNRS, UMR-S 1172-Lab, Lille Neuroscience & Cognition, Lille, France.
Background: Most of the data on visual functions in Leber hereditary optic neuropathy (LHON) is based on patient questionnaires. Our study assessed the impact of LHON on visual function by testing facial recognition and execution of purposeful actions.
Methods: Twelve participants with LHON with central scotoma ranging from 5° to 20° and 12 unaffected age-matched controls were involved in our study.
Clin Genet
December 2024
Departamento de Bioquímica, Biología Molecular y Celular, Universidad de Zaragoza, Zaragoza, Spain.
An in-depth analysis of susceptibility factors modifying the penetrance of rare Leber hereditary optic neuropathy-causing mutations in respiratory complex I genes encoded in mitochondrial deoxyribonucleic acid has not been performed. To bridge this gap, we conducted a review of the literature on rare mutations associated with LHON, selected those with substantial evidence of pathogenicity, and performed an in-depth analysis of the various pedigrees. Examining the influences that modify the penetrance of the classical mutations associated with this disease may offer insights into susceptibility factors in individuals carrying the rare mutations.
View Article and Find Full Text PDFJ Chin Med Assoc
December 2024
Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan, ROC.
Background: Induced pluripotent stem cell (iPSC) technology has emerged as a powerful tool for disease modeling, providing an innovative platform for investigating disease mechanisms. iPSC-derived organoids, including retinal organoids, offer patient-specific models that closely replicate in vivo cellular environments, making them ideal for studying retinal neurodegenerative diseases where retinal ganglion cells (RGCs) are impacted. N6-methyladenosine (m6A), a prevalent internal modification in eukaryotic mRNAs, plays a critical role in RNA metabolic processes such as splicing, stability, translation, and transport.
View Article and Find Full Text PDFNanomedicine (Lond)
December 2024
Department of Bioengineering, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia.
Leber's congenital amaurosis (LCA) represents a set of rare and pervasive hereditary conditions of the retina that cause severe vision loss starting in early childhood. Targeted treatment intervention has become possible thanks to recent advances in understanding LCA genetic basis. While viral vectors have shown efficacy in gene delivery, they present challenges related to safety, low cargo capacity, and the potential for random genomic integration.
View Article and Find Full Text PDFCurr Opin Neurol
December 2024
Department of Ophthalmology, Emory University School of Medicine.
Purpose Of Review: Leber hereditary optic neuropathy (LHON) is a mitochondrial DNA disease characterised by sequential bilateral vision loss due to loss of retinal ganglion cells. The purpose of this review is to provide an update on the results of recent clinical trials for LHON, focusing on studies of idebenone and lenadogene nolparvovec gene therapy.
Recent Findings: Evidence from three clinical studies (RHODOS, RHODOS-OFU, and LEROS) suggest that idebenone should be started early and continued for at least 24 months.
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