[由SAR1B基因变异引起的基因保留疾病在2例病例和文献综述中]
1Center for Pediatric Liver Diseases, Children's Hospital of Fudan University, Shanghai 201102, China.
概括
基米克朗保留疾病 (CMRD) 与SAR1B基因变异有关,在婴儿期经常出现发育不良和脂质吸收不良. 实验室发现包括低胆固醇,维生素缺乏,肝酶或肌酸酶的升高.
科学领域:
- 遗传学和分子生物学
- 儿科胃肠病学 儿科胃肠病学
- 罕见疾病 罕见疾病
背景情况:
- 胆米克朗保留病 (CMRD),也称为安德森病,是一种罕见的遗传疾病,影响脂质吸收.
- 它主要是由SAR1B基因的突变引起的,SAR1B基因对于基洛米克朗包装和分泌至关重要.
- 了解基因型-表型相关性对于诊断和管理至关重要.
研究的目的:
- 总结与SAR1B基因变异相关的基因型和临床特征.
- 审查现有文献,并介绍两个新的儿科病例的研究结果.
- 为CMRD的临床表现和遗传突变提供全面的概述.
主要方法:
- 分析了两名儿科CMRD患者的临床数据和遗传检测结果.
- 在主要的中英数据库 (PubMed, CNKI, Wanfang, VIP, CBMdisc) 进行了系统的文献搜索,截至2024年1月.
- 搜索术语包括"胆米克朗保留疾病"",安德森病"和"安德森综合征".
主要成果:
- 两名CMRD患者 (11岁男孩,4个月大的女孩) 呈现出脂质吸收不良,发育不良,低胆固醇血清,高氨酸酶/肌酸激酶和维生素E缺乏症.
- 基因分析揭示了同卵性 (c.224A>G) 和复合异卵性 (c.224A>G和c.554G>T) SAR1B变异.
- 文献审查确定了51名额外的CMRD患者,21种类型的SAR1B变体,通常与脂质吸收不良,维生素缺乏,发育不良和肝脏参与有关.
结论:
- 婴儿早期发育不良和脂质吸收不良是CMRD的标志性症状.
- 关键的实验室指标包括低胆固醇血症,潜在的脂溶性维生素缺乏,以及肝酶和/或肌酸酶的升高.
- 误解变异是同卵性CMRD病例中观察到的最常见的SAR1B基因型.
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