与 COL1 相关的重叠障碍:一种新兴的表型,与单基和双基基 COL1A1/2 变体相关
Nehal F Hassib1, Rasha M Elhossini2, Inas S M Sayed3
1Orodental Genetics Department, Human Genetics and Genome Research Institute, National Research Centre, Cairo, Egypt; Dental consultant, School of Dentistry, New Giza University, Giza, Egypt.
Archives of oral biology
|July 2, 2025
概括
这项研究在类似于骨质不完美的骨质发生的异常骨状况的家庭中发现了新的COL1A1/2基因变异. 这些发现扩大了对COL1相关疾病及其遗传基础的理解.
科学领域:
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
- 骨发育不良症 骨发育不良症
背景情况:
- 骨质发生不完美症 (OI) 和埃勒斯-丹洛斯综合征 (EDS) 是由原基因变异引起的结缔组织疾病.
- 不寻常的骨表型可能会带来诊断挑战,有时会与已知的遗传条件重叠.
- I型原蛋白由COL1A1和COL1A2基因编码,对骨和结缔组织的完整性至关重要.
研究的目的:
- 描述四个家族的临床,放射和口腔牙特征,其中四个家族具有无法解释的骨表型.
- 为了确定负责这些表型的 COL1A1 和 COL1A2 基因中的遗传变异.
- 扩大对COL1相关重叠疾病的理解.
主要方法:
- 对四个家庭的五名阿拉伯患者进行了临床和放射学评估.
- 详细的口腔牙科检查.
- 整体外基因组测序以识别COL1A1和COL1A2.2中的致病性遗传变异.
主要成果:
- 一个家庭呈现了COL1A1 (c.4340 T>G; p.(Val1447Gly)) 中的新型同卵性错误变异.
- 三个家族在COL1A2 (复发性c.1171 G>A; p.(Gly391Ser),复发性c.1253 G>C; p.(Gly418Ala)) 和COL1A1 (新型c.1678 G>A; p.(Gly560Ser)) 中存在单基变异.
- 患者表现出骨质疏松症,骨变形,灰色膜,虫骨和口腔牙异常,但缺乏典型的骨折.
结论:
- 一种新型的同卵性COL1A1变体导致了与以前报告的病例相比,不同的骨表型.
- 在三个家族中确定了单基COL1A1/2变体,呈现出一种类似于骨质发生不完美的表型.
- 这些发现扩大了COL1相关重叠疾病的范围.
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