Mitochondrial pathophysiology beyond the retinal ganglion cell: occipital GABA is decreased in autosomal dominant optic neuropathy
Graefes Arch Clin Exp Ophthalmol. 2018 Dec;256(12):2341-2348. doi: 10.1007/s00417-018-4153-z. Epub 2018 Oct 15. ABSTRACT PURPOSE: It has remained a mystery why some genetic mitochondrial disorders affect predominantly specific cell types such as the retinal ganglion cell. This is particularly intriguing concerning retinal and cortical function since they are tightly linked in health and disease. Autosomal […]
Validating the RedMIT/GFP-LC3 Mouse Model by Studying Mitophagy in Autosomal Dominant Optic Atrophy Due to the OPA1Q285STOP Mutation
Front Cell Dev Biol. 2018 Sep 19;6:103. doi: 10.3389/fcell.2018.00103. eCollection 2018. ABSTRACT Background: Autosomal dominant optic atrophy (ADOA) is usually caused by mutations in the essential gene, OPA1. This encodes a ubiquitous protein involved in mitochondrial dynamics, hence tissue specificity is not understood. Dysregulated mitophagy (mitochondria recycling) is implicated in ADOA, being increased in OPA1 […]
Genetic analysis in a cohort of patients with hereditary optic neuropathies in Southwest of China
Mitochondrion. 2019 May;46:327-333. doi: 10.1016/j.mito.2018.09.002. Epub 2018 Sep 7. ABSTRACT We report the results of molecular screening in 121 patients with suspected hereditary optic neuropathies. The 34 primary and 9 secondary LHON mutations were screened in all the patients. In the familial cases, OPA1 was also tested when negative finding for the mtDNA mutations screening. […]
Meta-analysis of genotype-phenotype analysis of OPA1 mutations in autosomal dominant optic atrophy
Mitochondrion. 2019 May;46:262-269. doi: 10.1016/j.mito.2018.07.006. Epub 2018 Aug 27. ABSTRACT Autosomal Dominant Optic Atrophy (ADOA) is a neuro-ophthalmic disease characterized by progressive bilateral vision loss, pallor of the optic disc, central vision loss, and impairment of color vision. Additionally, a small percentage of patients experience hearing loss and ataxia, while recent studies suggest disruption of […]
Inhibition of autophagy curtails visual loss in a model of autosomal dominant optic atrophy
Nat Commun. 2020 Aug 12;11(1):4029. doi: 10.1038/s41467-020-17821-1. ABSTRACT In autosomal dominant optic atrophy (ADOA), caused by mutations in the mitochondrial cristae biogenesis and fusion protein optic atrophy 1 (Opa1), retinal ganglion cell (RGC) dysfunction and visual loss occur by unknown mechanisms. Here, we show a role for autophagy in ADOA pathogenesis. In RGCs expressing mutated […]
Serum NT/CT SIRT1 ratio reflects early osteoarthritis and chondrosenescence
Ann Rheum Dis. 2020 Oct;79(10):1370-1380. doi: 10.1136/annrheumdis-2020-217072. Epub 2020 Jul 14. ABSTRACT OBJECTIVE: Previous work has established that the deacetylase sirtuin-1 (SIRT1) is cleaved by cathepsin B in chondrocytes subjected to proinflammatory stress, yielding a stable but inactive N-terminal (NT) polypeptide (75SIRT1) and a C-terminal (CT) fragment. The present work examined if chondrocyte-derived NT-SIRT1 is […]
A novel AFG3L2 mutation close to AAA domain leads to aberrant OMA1 and OPA1 processing in a family with optic atrophy
Acta Neuropathol Commun. 2020 Jun 29;8(1):93. doi: 10.1186/s40478-020-00975-w. ABSTRACT Autosomal dominant optic atrophy (ADOA) is a neuro-ophthalmic condition characterized by bilateral degeneration of the optic nerves. Although heterozygous mutations in OPA1 represent the most common genetic cause of ADOA, a significant number of cases remain undiagnosed.Here, we describe a family with a strong ADOA history […]
Opa1 Deficiency Leads to Diminished Mitochondrial Bioenergetics With Compensatory Increased Mitochondrial Motility
Invest Ophthalmol Vis Sci. 2020 Jun 3;61(6):42. doi: 10.1167/iovs.61.6.42. ABSTRACT PURPOSE: Retinal ganglion cells (RGCs) are susceptible to mitochondrial deficits and also the major cell type affected in patients with mutations in the OPA1 gene in autosomal dominant optic atrophy (ADOA). Here, we characterized mitochondria in RGCs in vitro from a heterozygous B6; C3-Opa1Q285STOP (Opa1+/-) […]
Comparison of Lamina Cribrosa Morphology in Normal Tension Glaucoma and Autosomal-Dominant Optic Atrophy
Invest Ophthalmol Vis Sci. 2020 May 11;61(5):9. doi: 10.1167/iovs.61.5.9. ABSTRACT PURPOSE: To compare lamina cribrosa (LC) morphology in patients with normal tension glaucoma (NTG) and autosomal-dominant optic atrophy (ADOA). METHODS: This cross-sectional study matched 24 patients diagnosed with ADOA (24 eyes) by age and retinal nerve fiber layer thickness with 48 patients diagnosed with NTG […]
Synthesis of Dideoxy-octonic Acid and Cyclic and Acyclic Derivatives Thereof
Org Lett. 2020 May 1;22(9):3373-3376. doi: 10.1021/acs.orglett.0c00842. Epub 2020 Apr 13. ABSTRACT Oxidative cleavage of N-acetyl-neuraminic acid (Neu5Ac, 1) leads to the open chain octonic acid (ADOA, 2), which under various conditions is transformed into an acyclic acid or ester or into a six- or five-membered octonic acid lactone and lactam, respectively. All reactions proceed […]