在不明原因的智力障碍下下一代测序
Sapna Sandal1, Ishwar Chander Verma1, Sunita Bijarnia Mahay1
1Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India.
Indian journal of pediatrics
|October 7, 2023
概括
下一代测序 (NGS) 为印度患者的智力障碍 (ID) 提供了高的诊断产量. 这种基因测试方法可以识别致病变异,指导临床管理和家庭的生殖选择.
科学领域:
- 遗传学 是一个遗传学.
- 基因组医学是基因组医学.
- 儿科神经学 儿科神经学
背景情况:
- 智力障碍 (ID) 影响了人口的很大一部分,通常在常规测试后具有未知的遗传原因.
- 了解ID的遗传基础对于准确的诊断,管理和遗传咨询至关重要.
- 关于印度ID分子遗传谱的数据有限.
研究的目的:
- 为了评估下一代测序 (NGS) 的诊断产量,用于通过标准遗传测试无法解释的智力障碍 (ID).
- 评估确定的遗传诊断对临床管理和家庭遗传咨询的影响.
- 调查印第安人队伍中ID的遗传异质性和共同遗传模式.
主要方法:
- 这是一项双向研究,涉及227名患者 (126名前性,101名后性) 患有中度至严重的ID.
- 所有参与者都进行了基于下一代测序 (NGS) 的基因测试.
- 包括费舍尔精确测试在内的统计分析被用来比较患者组之间的诊断产量.
主要成果:
- NGS的整体诊断产量为53.3% (121/227),在84个已知的ID基因中确定了致病变异.
- 自体後退性智力障碍 (ARID) 是最常见的遗传原因 (23.3%),其次是自体主导性智力障碍 (ADID) (20.7%) 和X链接智力障碍 (XLID) (9.2%).
- 与单独的ID (20%) 相比,ID加相关疾病患者的诊断收益率显著更高 (55.6%).
- 确定的诊断影响了14%的家庭的临床管理和21.4%的家庭的生殖结果.
结论:
- 在印度人口中,NGS在诊断未知病因的智力障碍 (ID) 方面非常有效.
- 自体後退性智力障碍 (ARID) 是该队列中智力障碍的普遍原因.
- 通过NGS建立基因诊断显著影响临床管理和家庭生殖规划,强调了基因测试和表型相关性的重要性.
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