在Beckwith-Wiedemann光谱中四肢不对称的差异的演变
Ryan D Lopez1, Carter E Hall2, Jonathan H Sussman1
1Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
Journal of children's orthopaedics
|October 20, 2025
概括
在贝克威特-维德曼谱中的四肢不对称性进展缓慢,受基因型和BMI的影响. 11号染色体上的父性单亲性异分体显示出更大的初始不对称性,但在遗传亚型中,进展率相似.
科学领域:
- 遗传学 遗传学 是一个
- 儿科内分泌学 儿科内分泌学
- 发展生物学 发展生物学
背景情况:
- 贝克威斯-维德曼谱是一种遗传性疾病,导致横向过度生长,通常是四肢不对称.
- 虽然四肢长度差异已知,但四肢体积不对称和手/脚不对称的进展理解较少.
- 这项研究调查了贝克威思-维德曼谱的儿童肢体体积差的自然史.
研究的目的:
- 为了检查被诊断患有贝克威斯-维德曼谱的儿童肢体体积差异的进展.
- 确定影响四肢不对称症的严重程度和进展的特定遗传因素和临床参数.
- 分析不同基因型 (印记中心2的甲基化损失,印记中心1的甲基化增益,11号染色体上的父单亲异体) 对不对称性的影响.
主要方法:
- 对142名具有分子确认贝克威斯-维德曼谱的儿童进行了回顾性分析.
- 从临床访问中收集四肢测量 (上臂,前臂,大腿,小腿,手掌,手指,脚).
- 应用线性混合效应模型来评估基因型,年龄,BMI和性别对不对称性进展的影响.
主要成果:
- 在印记中心2甲基化损失组的上臂,小腿和脚部观察到显著的四肢体积差异进展.
- 与其他基因型相比,在11号染色体基因型的父性单亲性异构症在大多数四肢区域呈现出更大的基线不对称性.
- 体重指数与上臂和小腿肢体体积差异增加正相关.
结论:
- 贝克威斯-维德曼谱中的四肢不对称性在特定区域呈现缓慢进展,基线严重程度受基因型和BMI的影响.
- 虽然11号染色体上的父性单亲性异构症与较大的初始不对称性有关,但在所有基因型中,进展率一致.
- 需要进一步的研究来阐明横向过度生长的机制及其在Beckwith-Wiedemann频谱中的临床影响.
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