塞拉克1缺乏症-一种新的表现型
Emanuel Martins1, João Durães2, Célia Nogueira3
1Centro Hospitalar Universitário de Coimbra Neurology Department Coimbra Portugal.
Endocrine, metabolic & immune disorders drug targets
|September 15, 2023
概括
缺少SERAC1会导致MEGD(H) EL综合征,其特征是神经和代谢问题. 一个案例研究强调了诊断方面的挑战,表明生化特征可以表明SERAC1缺乏,即使没有遗传确认.
科学领域:
- 遗传学和神经学 遗传学和神经学
- 线粒体疾病 线粒体疾病
- 生物化学遗传学 生物化学遗传学
背景情况:
- 缺少SERAC1会导致一系列的神经系统疾病,从严重的MEGD和HEL综合征到较轻的形式.
- MEGD(H) EL综合征涉及3甲基谷氨基酸性尿,聋, dystonia,肝病变,脑病变和莱氏状综合征.
- 诊断标准包括特征性的生化异常和在SERAC1基因中确认的双样性致病变体.
研究的目的:
- 报告两名疑似SERAC1缺乏症的患者,探索诊断细微差别.
- 评估临床表现,生化标志物和SERAC1缺陷中的遗传发现之间的相关性.
- 讨论生物化学资料在具有模两可的遗传结果的情况下的诊断效用.
主要方法:
- 两名患有神经症状和代谢障碍的患者的临床病例报告.
- 生物化学分析包括尿中的3-甲基和3-甲基酸,以及血清乳酸和氨酸.
- 基因分析用于识别SERAC1基因中的致病变体.
主要成果:
- 患者1:根据临床症状,生化发现和双性SERAC1致病变体,诊断出MEGD(H) EL综合征.
- 患者2:表现为认知障碍和性四周病;生化资料表明SERAC1缺乏,但确定的SERAC1变异被认为是良性的.
- 两位患者的大脑MRI都显示出基底腺的病变,在2位患者的额外发现表明白内障.
结论:
- 第一个患者的表现和测试结果毫不含糊地证实了由于SERAC1缺陷而导致的MEGD(H) EL综合征.
- 第二名患者的生物化学概况强烈表明SERAC1缺乏,尽管看似良性的遗传变异,突出诊断复杂性.
- 线粒体功能障碍和高代谢物的生化证据应被认为对SERAC1缺乏症诊断具有重要意义,即使基因确认不确定.
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