与马方综合征相关的FBN1变异的解释和分类:临床基因组资源的FBN1变异治愈专家小组的共识建议
A Drackley1, C Somerville2, P Arnaud3,4
1Department of Pathology & Laboratory Medicine, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA.
对FBN1基因变异的新指导方针改善了马方综合征的诊断. 这些基因特异性适应美国医学遗传学和基因组学学院 (ACMG) 和分子病理学协会 (AMP) 标准,提高了变体分类一致性.
科学领域:
- 基因组学就是基因组学.
- 临床遗传学 临床遗传学
- 分子病理学分子病理学
背景情况:
- 2015年,美国医学遗传学和基因组学学院 (ACMG) 和分子病理学协会 (AMP) 制定了门德尔疾病的标准化变异治疗指南.
- 这些指导方针虽然被广泛采用,但缺乏基因和疾病特定的细节,导致分类差异.
- 临床基因组资源FBN1变异愈专家小组 (VCEP) 于2018年成立,以适应与马凡综合征相关的FBN1变异的ACMG/AMP标准.
研究的目的:
- 为FBN1基因开发基因特异性适应ACMG/AMP变异愈标准.
- 为了减轻与马方综合征相关的FBN1变异的分类差异.
- 提高临床实验室遗传变异分类的准确性和一致性.
主要方法:
- 通过文献审查,专家调查,在线讨论和对60种变种的试点测试,制定了建议.
- 共识被定义为至少75%的VCEP成员的同意.
- 最终规则由ClinGen序列变异解释工作组批准.
主要成果:
- 对28个ACMG/AMP证据标准中的14个进行了修改,其中6个被认为不适用.
- 规范包括精细的小等位基因频率值,FBN1的PVS1流程图,定义的蛋白质功能域,以及探针,新出现和家族分离数据的基于点的系统.
- 120个变体已被策划并存储在ClinVar中,并获得3星评审状态.
结论:
- 针对FBN1变种的具体调整为改善分类一致性提供了一个框架.
- 这一框架提高了玛凡综合征遗传检测的可靠性.
- 最终,这些调整旨在改善诊断为马方综合征的患者的临床护理.
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