案例报告:通过基于MARSALA的PGT-M预防X链接视网膜分裂的传播
Jieliang Li1, Xiaojun Wen1, Zhanhui Ou1
1Reproductive Center, Zhongshan Boai Hospital, Zhongshan, Guangdong, China.
Frontiers in ophthalmology
|January 30, 2026
概括
针对单一性疾病的植入前遗传测试 (PGT-M) 成功预防了X链接视网膜分裂 (XLRS) 的传播. 这种基因测试确定了健康的胚胎,使一个家庭能够有一个不受影响的孩子,证明了PGT-M.
科学领域:
- 眼科医生 眼科 眼科
- 遗传学 是一个遗传学.
- 生殖医学 生殖医学
背景情况:
- 链接到X的视网膜分裂 (XLRS) 是一种由RS1基因突变引起的遗传性视网膜疾病,导致视力受损.
- 一个有XLRS病史的家庭试图防止致病性RS1变异向后代传播.
- 之前的几代人经历了双边视力障碍和变形视觉障碍,由于这种情况.
研究的目的:
- 描述在预防XLRS传播方面成功应用单一性疾病 (PGT-M) 的植入前遗传测试.
- 为了证明一个集成的PGT-M策略的有效性,为X链接遗传疾病的家庭.
主要方法:
- 使用下一代测序 (NGS) 和桑格测序来识别家族中的特定c.187T>C (p.Cys63Arg) RS1突变.
- 在PGT-M平台上使用了通过动脉化和链接分析 (MARSALA) 测序揭示的突变性等位基因.
- 马尔萨拉涉及全基因组放大 (MALBAC),NGS,SNP哈普类型分析,以及对活检胚芽细胞的拷贝数变异 (CNV) 查.
主要成果:
- 分析了8个胚芽细胞,确定了3个没有家族RS1突变的euploid胚胎.
- 遗传咨询和转移高质量的幼胚胎 (E1,6AA) 导致临床怀孕.
- 三月中旬的乳液检测证实了正常的男性型和RS1变体的缺失,导致了一个健康的婴儿出生.
结论:
- 基于MARSALA的综合PGT-M策略有效地防止了像XLRS.这样的X关联疾病的代际传播.
- 这种方法使具有遗传风险的家庭能够怀孕健康的后代.
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