Clinical features of patients with mutations in genes for nanophthalmos

医学 基因 外显子组测序 突变 色素性视网膜炎 遗传学 病理 眼科 视网膜 胃肠病学 生物
作者
Xueqing Li,Hui Xiao,Yihua Su,Xueshan Xiao,Shiqiang Li,Shufen Lin,Lei Fang,Wenmin Sun,Panfeng Wang,J. Fielding Hejtmancik,Minbin Yu,Liming Chen,Qingjiong Zhang,Xing Liu
出处
期刊:British Journal of Ophthalmology [BMJ]
卷期号:: bjo-324931
标识
DOI:10.1136/bjo-2023-324931
摘要

Background/Aims To distinguish the clinical feature of nanophthalmos (NNO) caused by mutations in protease serine 56 ( PRSS56 ), membrane-type frizzled-related protein ( MFRP ), myelin regulatory factor ( MYRF ) and transmembrane protein 98 ( TMEM98 ) and to evaluate the association between angle-closure glaucoma (ACG) and NNO. Methods Variants in those four genes were identified through exome sequencing/whole genome sequencing data, and bioinformatic analysis was conducted to identify pathogenic/likely pathogenic (P/LP) variants. This observational study comprehensively summarised ophthalmological data of 67 patients with NNO from 63 families. Ocular parameters from 68 eyes without surgical treatment were subjected to further analysis. Results Totally, 67 patients from 63 families harboured 57 P/LP variants in the four genes, including 30 in PRSS56 (47.6%), 23 in MFRP (36.5%), 5 in TMEM98 (7.9%) and 5 in MYRF (7.9%). ACG was present in 79.1% of patients. An analysis of ocular parameters from 68 eyes revealed that shorter axial length (AL), lower vitreous-to-AL ratios and severe foveal hypoplasia were associated with variants in PRSS56 and MFRP . Uveal effusion was more common in patients with PRSS56 variants, while retinitis pigmentosa was frequently observed in patients with MFRP variants. Patients with MYRF variants exhibited the thinnest retinal nerve fibre layer thickness. Patients with TMEM98 variants had an earlier average onset age of glaucoma. Conclusion Variants in PRSS56 and MFRP are the most common genetic cause of NNO. ACG is a severe complication frequently observed in these patients. Earlier onset of ACG is observed in patients with dominant NNO, while foveal hypoplasia is more common in patients with recessive disease. Recognising these features is helpful in clinical care and genetic counselling.
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