分支链氨基酸转移酶2 (BCAT2) 缺乏:一系列病例和系统审查
Maja Filipic1, Ziga Iztok Remec2, Ana Drole Torkar1,3
1Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia.
Molecular genetics and metabolism reports
|February 2, 2026
概括
分支链氨基酸转氨酶2 (BCAT2) 缺乏症呈现出广泛的症状,从无症状到严重的神经问题. 素补充剂可以降低BCAA水平,但临床改善有所不同,突出了诊断方面的挑战.
科学领域:
- 生物化学 生物化学
- 遗传学 是一个遗传学.
- 代谢障碍 代谢障碍 代谢障碍
背景情况:
- 分支链氨基酸转氨酶2 (BCAT2) 缺乏症是一种罕见的自体逆向性疾病,影响分支链氨基酸 (BCAA) 代谢.
- 有限的病例报告导致对其临床和代谢表现的理解不完全.
研究的目的:
- 描述BCAT2缺乏症的三个新案例.
- 进行以前报告的BCAT2缺乏病例的系统文献审查.
- 阐明与BCAT2缺乏相关的临床异质性和诊断挑战.
主要方法:
- 代谢评估和基因测试 (BCAT2基因测序) 用于诊断.
- 通过症状呈现,级联查和新生儿查,确定了三起新病例.
- 对有关BCAT2缺乏症的现有文献进行了系统审查.
主要成果:
- 这三名新型患者都对BCAT2基因中的c.600C>A变异具有同胞性.
- 临床表现范围从无症状到有症状,包括头痛,发育迟缓和智力障碍.
- 文献审查发现了8个额外的病例;共同特征包括智力障碍 (55%) 和神经症状 (36%).
- 素补充剂降低了BCAA水平,但只有50%的患者表现出临床改善.
结论:
- 在临床表现方面,BCAT2缺乏症表现出显著的个体间变异性,使病原性评估复杂化.
- 这种c.600C>A变体是BCAT2缺乏症的复发性突变.
- 需要进一步的研究来了解全谱,并优化BCAT2缺乏症的治疗策略.
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