在SIX6中出现的新型组合异质合体变体会导致像光盘一样的PAX2,带有斑点异常,没有共存的微眼病或白内障
Karthikeyan Arcot Sadagopan1,2,3
1Senior Consultant, Clinical Scientist and International Faculty, Pediatric Ophthalmology and Ocular Genetics, CMER (Shenzhen) Dennis Lam Hospital, Shenzhen, China.
Ophthalmic genetics
|March 14, 2025
概括
在SIX6基因中的新型化合物异构基因变异会导致视盘发育不良和中国患者的斑点异常. 这一发现扩大了这些罕见的先天性眼睛疾病的已知遗传原因.
科学领域:
- 眼科医生 眼科 眼科
- 遗传学 遗传学 是一个
- 发展生物学 发展生物学
背景情况:
- 带有斑点异常的先天性视觉盘发育不良可以表现为各种综合征,包括晨光盘异常,视觉盘坑,PAX6相关的光盘结肠瘤和PAX2相关的乳头综合征.
- 这些情况通常涉及对眼睛形成至关重要的发育基因.
研究的目的:
- 报告SIX6基因中与光盘发育不良和黄斑异常相关的新型化合物异构变异.
- 描述中华裔患者的临床和眼球连贯性断层扫描 (OCT) 发现,这些变异.
- 为了区分这种罕见的疾病与光盘和黄斑异常的其他原因.
主要方法:
- 进行了全面的眼科评估,包括 fundus 摄影和黄斑 OCT.
- 进行了系统评估和分子遗传测试,特别是整个外体序列 (WES) 测试.
- 基因分析包括测试SIX6,TULP1,PAX2,PAX6和其他相关发育基因的变异.
主要成果:
- 全系外体测序确定了SIX6和TULP1基因中的复合异合体变异体.
- 没有发现PAX2,PAX6或其他已知的形缩或杆缩基因的致病变体.
- 这位患者的父母是SIX6和TULP1.1两种变异的异构体载体.
结论:
- 在SIX6的致病变体可以导致光盘发育不良和斑点异常,可能模仿其他综合征,如帕皮洛综合征.
- 微妙的光盘发育不良需要仔细评估,以区分这种罕见的实体与孤立的圆或圆杆缩症的更常见原因.
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