在女性中MCT8缺乏症
Stefan Groeneweg1, Ferdy S van Geest1, Floor van der Most1
1Academic Center for Thyroid Diseases, Department of Internal Medicine, Erasmus Medical Center, Erasmus University Rotterdam, 3015 GD Rotterdam, the Netherlands.
The Journal of clinical endocrinology and metabolism
|May 27, 2025
概括
在SLC16A2中异构的致病变体可以在患有MCT8缺乏症的女性中引起神经认知和甲状腺问题. 在这些演示中,歪曲的X染色体失活是关键.
科学领域:
- 遗传学和分子生物学
- 内分泌学 在内分泌学.
- 神经科学是一个神经科学.
背景情况:
- 单碳酸盐运输体8 (MCT8) 对于甲状腺激素 (TH) 穿越血脑屏障的运输至关重要.
- 在SLC16A2的致病变体导致MCT8缺乏 (艾伦-赫伦登-达德利综合征),通常影响男性由于X链接遗传.
- 这种综合征的特点是智力障碍,运动缺陷和异常的甲状腺功能测试.
研究的目的:
- 研究女性患者MCT8缺乏症的临床表现和潜在的遗传机制.
- 分析SLC16A2中异性致病变体对TH运输和女性神经认知功能的影响.
- 突出X染色体失活在女性携带者的症状表现中的作用.
主要方法:
- 基因分析用于在女性患者中识别SLC16A2中的异性致病变体.
- 在患者衍生细胞中进行X染色体无活化研究.
- 使用转染细胞和患者纤维细胞对SLC16A2变异的功能评估,以评估TH运输能力.
主要成果:
- 确定了8名患有SLC16A2异构致病原体变异的女性患者,呈现出可变的神经认知和行为问题,以及异常的TH水平.
- 所有识别的误解变异都在功能性测试中显著减少了MCT8-介导的TH吸收.
- 在所有评估的女性患者中观察到歪曲的X染色体不活化,纤维细胞的TH吸收受损,与男性患者的TH吸收受损相似.
结论:
- 患有SLC16A2异构性致病变体和偏斜X染色体失活的女性患者可以表现出各种神经发育,行为和甲状腺功能异常.
- 对于表现为神经认知障碍和甲状腺功能测试异常的女性患者,建议对SLC16A2遗传变异进行测试.
- 这些发现扩大了对MCT8缺乏及其女性表型变异性的理解.
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