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鉴定和现型分析新型LTBP2突变的中国队列与先天性ectopia lentis

Liyan Liu¹, Dongwei Guo¹, Fengmei Yang¹

¹State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, China.

Molecular vision

|January 15, 2024

概括

潜伏转化生长因子β结合蛋白2 (LTBP2) 基因的突变在2.76%的中国患者中被发现. 这些LTBP2突变与特定的眼部特征有关,如大角膜和高近视.

科学领域:

眼科医生眼科眼科
遗传学是一个遗传学.
分子生物学分子生物学

背景情况:

先天性眼内膜炎 (CEL) 是一种罕见的遗传疾病,影响眼睛的透镜.
各种基因的突变与CEL有关,但遗传原因的范围需要进一步阐明.
潜伏转化生长因子β结合蛋白2 (LTBP2) 基因是参与眼部发育的潜在候选者.

研究的目的:

为了确定LTBP2基因突变的频率,在中国的CEL患者队列中.
描述与这些患者LTBP2突变相关的临床特征和表型.

主要方法:

招募145名被诊断患有CEL的中国试验人员.
对所有参与者进行全面的眼睛和系统检查.
整体外体序列测定以确定遗传突变,随后进行桑格序列测定和生物信息学分析以验证.

主要成果:

在145名试验者中有4名 (2.76%) 发现了LTBP2基因中的双基因突变.
发现了8种新的LTBP2突变.
患有LTBP2突变的患者呈现出巨角膜,球面,高近视和玻璃眼,与其他CEL基因相关的表型不同.
一种新的同卵性框架转移突变导致了更复杂的眼睛症状,影响眼睛的前后两部分.

结论:

本研究确定了LTBP2在中国CEL队列中的突变频率.
报告了LTBP2突变和CEL之间的新型基因型-表型关联,扩大了对这种遗传疾病的理解.

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