To determine a chemical agent that can reduce the aggregation of optineurin (OPTN) in cells differentiated from induced pluripotent stem cells obtained from a patient with normal-tension glaucoma (NTG) caused by an E50K mutation in the OPTN gene (OPTNE50K-NTG).
The frequency of the OPTN M98K mutation in an additional 120 patients (70 HTG and 50 normal tension glaucoma [NTG]) was analyzed by restriction enzyme digestion.
To study the clinical relevance of sequence alterations in the optineurin gene (OPTN) among Japanese patients with open-angle glaucoma, including both primary open-angle glaucoma (POAG) and normal tension glaucoma (NTG).
Since NTG is reported to be the most common form of glaucoma in Japan, and to identify if the OPTN gene plays a role in POAG, the DNAs from 148 unrelated Japanese patients with NTG, 165 patients with POAG and 196 unrelated controls who were not suffering glaucoma were investigated by appropriate genotyping techniques.
The gene that causes normal tension glaucoma (NTG) in a large pedigree was recently mapped to a region of chromosome 12q14 (GLC1P) that contains the genes TBK1, XPOT, RASSF3, and GNS.
We evaluated POAG overall as well as two subtypes of POAG defined as intraocular pressure (IOP) ≥22 mmHg (high-pressure glaucoma [HPG]) or IOP <22 mmHg (normal pressure glaucoma [NPG]) at diagnosis.
SNPs at intervening sequence (IVS) 8, +4, and +32 of the OPA1 gene were directly sequenced from 48 individuals with POAG/IOP, 48 nonglaucomatous controls, and 61 people with NTG.
Mutations in two genes, optineurin (OPTN) and TANK binding kinase 1 (TBK1), cause familial NTG and have known roles in the catabolic cellular process autophagy.
Single-strand conformation polymorphism analysis and subsequent sequence analysis were performed for genotyping the myocilin gene in 114 unrelated Japanese patients with NTG.