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Updated: Jun 4, 2025

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Analysis of LINE-1 Retrotransposition at the Single Nucleus Level
Published on: April 23, 2016
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LINE-1诱导的逆转换影响早期植入前胚胎DNA完整性和多能性
Prodromos Sakaloglou1, Leandros Lazaros1,2, Ioanna Bouba1
1Laboratory of Medical Genetics and Human Reproduction, School of Health Sciences, Faculty of Medicine, University of Ioannina, 451 10 Ioannina, Greece.
International journal of molecular sciences
|December 17, 2024
概括
在人类胚胎中LINE-1逆转移体的过度表达导致DNA损伤和发育障碍. 这种异常的反元素活性对多能因子表达和胚胎活力产生了负面影响.
科学领域:
- 生殖生物学 生殖生物学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 可逆转移的元素,如LINE-1,有助于基因组的不稳定性和改变基因表达,可能导致人类疾病.
- 在人类基因组中,LINE-1元素是活跃的,它们的失调与各种病理有关.
研究的目的:
- 研究LINE-1过度表达对人类植入前胚胎DNA完整性,甲基化和多能因子表达 (OCT4,SOX2,NANOG) 的影响.
- 评估LINE-1逆转换对早期人类胚胎发育的影响.
主要方法:
- 人类MII卵细胞在体外成熟并通过ICSI通过含EGFP载体的LINE-1或控制载体转染.
- 使用光显微镜监测逆转换事件.
- 在移植胚胎中分析了植入前发育,DNA甲基化,多能因子表达和DNA双链断裂 (DSB).
主要成果:
- 在转染的人类胚胎中发生LINE-1逆转移,导致发育异常,包括加速不对称的细胞分裂,碎片化,裂停止和退化.
- 虽然OCT4表达最初没有受到影响,但SOX2和NANOG表达在状细胞阶段受到阻碍,原因是裂停止和碎片化.
- 在早期的芽细胞体中观察到DNADSB的增加,但在发育停止之前没有发现显著的DNA甲基化变化.
结论:
- 在人类植入前胚胎中LINE-1逆转换可以诱导DNA双链断裂并破坏关键多能性因子的表达.
- 异常LINE-1表达对人类胚胎发育产生负面影响,导致形态和功能缺陷.
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