新的STAG2变种扩展了穆莱加马-克莱因-马丁内斯综合征表型
Cormac Duff1, Samy Allawendy1, Andrew J Green2
1Children's Health Ireland at Temple Street, Dublin, Ireland.
European journal of medical genetics
|June 2, 2025
概括
一种新的STAG2基因变异扩大了Mullegama-Klein-Martinez综合征 (MKMS) 的临床谱. 这种凝聚力病例突出了严重的智力障碍和以前不相关的垂体功能障碍,强调了针对性查的必要性.
科学领域:
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
- 内分泌学 在内分泌学.
背景情况:
- STAG2基因编码的是凝聚素复合体的一个子单元,这对于细胞分裂期间的姐妹染色体分离至关重要.
- 在STAG2的致病变体与Mullegama-Klein-Martinez综合征 (MKMS) 相关,这是一个罕见的X链接合症.
- MKMS的临床表现尚未完全阐明,特别是在内分泌干扰方面.
研究的目的:
- 报告STAG2基因中的新型异合体结合部位致病变体.
- 描述MKMS的扩展临床表型,包括以前不相关的特征.
- 强调在患有 STAG2 变异的患者下垂体成像和查的重要性.
主要方法:
- 在STAG2.2中,基因分析识别出一种新型异质合体拼接部位致病变体 (c.1196+4_1196+7del).
- 患者的临床表型,包括神经学,发育和内分泌评估.
- 对STAG2变种和MKMS现有文献的审查.
主要成果:
- 这位患者呈现出严重的智力障碍,小头症,矮身和单一的前牙.
- 发现了一种新的STAG2变种,扩大了MKMS已知的遗传原因.
- 患者表现出异位性后垂体腺,导致血管压素缺乏,肥胖症,超纳特雷米性脱水和急性功能衰竭,需要透析.
- 这些垂体异常以前没有在MKMS中描述过.
结论:
- 这种病例扩大了已知的Mullegama-Klein-Martinez综合征的临床表型.
- 在患有严重智力障碍和无法解释的垂体功能障碍的患者中,应考虑STAG2致病变体.
- 对于患有STAG2变异的个体,建议进行深度垂体成像和内分泌监测,以早期检测出形和功能障碍.
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