نتایج جستجو برای: lhon
تعداد نتایج: 362 فیلتر نتایج به سال:
Primary Open Angle Glaucoma (POAG) is a common neurodegenerative disease characterized by the selective and gradual loss of retinal ganglion cells (RGCs). Aging and increased intraocular pressure (IOP) are glaucoma risk factors; nevertheless patients deteriorate at all levels of IOP, implying other causative factors. Recent evidence presents mitochondrial oxidative phosphorylation (OXPHOS) comp...
نوروپاتی ارثی عصب بینایی لبر (lhon) بیماری ارثی با ضعف بینایی چشمها و فقدان دید مرکزی می باشد. علت اولیه فقدان دید، جهش در dna میتوکندریایی است. اگر چه تأثیر فاکتورهای ژنتیکی و یا اپی ژنتیکی ثانویه ناشناخته ای نیز در نوروپاتی آن پیشنهاد می شود. این مطالعه برای اولین بار پلی مورفیسم ژنهای فولات و ریسک فاکتور ژنتیکی ثانویه lhon را در صورت وجود مورد بررسی قرار می دهد. پلی مورفیسمهای معمول ژنهای مت...
Purpose To present a report of longitudinal changes in radial peripapillary capillaries (RPC) and changes in retinal full thickness (RFT) and peripapillary retinal nerve fiber layer (RNFL) in a patient with Leber hereditary optic neuropathy (LHON). Observations A 42-year-old man presented with acute- and presymptomatic-stage LHON in the left (OS) and right (OD) eyes, respectively, at the init...
Leber's hereditary optic neuropathy (LHON) is characterized by retinal ganglion cell (RGC) degeneration with the preferential involvement of those forming the papillomacular bundle. The optic nerve is considered the main pathological target for LHON. Our aim was to investigate the possible involvement of the post-geniculate visual pathway in LHON patients. We used diffusion-weighted imaging for...
BACKGROUND Leber hereditary optic neuropathy (LHON) is one of the most common mitochondrial diseases, which is mainly caused by three mitochondrial DNA (mtDNA) mutations (m.3460G>A, m.11778G>A and m.14484T>C). Incomplete penetrance suggests that there might be asymptomatic carriers in general populations. These asymptomatic carriers are clinically important as they are potential future patients...
PURPOSE OF REVIEW Leber hereditary optic neuropathy (LHON) is the most common primary mitochondrial DNA (mtDNA) genetic disorder in the population. We address the clinical evolution of the disease, the secondary etiological factors that could contribute to visual loss, and the challenging task of developing effective treatments. RECENT FINDINGS LHON is characterized by a preclinical phase tha...
Leber hereditary optic neuropathy: respiratory chain dysfunction and degeneration of the optic nerve
Leber hereditary optic neuropathy (LHON) is an inherited form of bilateral optic atrophy in which the primary etiological event is a mutation in the mitochondrial genome. The optic neuropathy involves a loss of central vision due to degeneration of the retinal ganglion cells and optic nerve axons that subserve central vision. The primary mitochondrial mutation is necessary, but not sufficient, ...
Leber hereditary optic neuropathy (LHON) is one of the most common inherited optic neuropathies causing bilateral central vision loss. The disorder results from point mutations in mitochondrial DNA and subsequent mitochondrial dysfunction. The primary cell type that is lost in LHON is the retinal ganglion cell, which is highly susceptible to disrupted ATP production and oxidative stress. Inheri...
We here report on the existence of Leber's hereditary optic neuropathy (LHON) associated with peculiar combinations of individually non-pathogenic missense mitochondrial DNA (mtDNA) variants, affecting the MT-ND4, MT-ND4L and MT-ND6 subunit genes of Complex I. The pathogenic potential of these mtDNA haplotypes is supported by multiple evidences: first, the LHON phenotype is strictly inherited a...
OBJECTIVE To ascertain the efficacy of idebenone and multivitamin treatment in Leber's hereditary optic neuropathy (LHON). METHOD Two patients diagnosed of unilateral LHON were treated with megadoses of idebenone, vitamin C and riboflavin for one year. They were examined clinically before, during and after treatment. RESULTS No improvement of visual function was observed. Despite the ideben...
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