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在第5天胚胎囊中增加的OCT4表达可能解释了D5与D6胚胎囊转移的临床结果增加
Jui-Hua Lee1,2, Wei-Fang Chang1,2, Shang-Yu Tzeng1
1Taipei Fertility Center, Taipei, Taiwan.
Human reproduction (Oxford, England)
|November 11, 2025
概括
高等级的第5天 (D5) 胚胎囊显示出比第6天 (D6) 胚胎囊更高的活产率. 这种差异可能与D6胚胎中的OCT4表达率较低有关,这影响了试管婴儿的成功.
科学领域:
- 生殖医学 生殖医学
- 胚胎学 胚胎学
- 在体外受精 (IVF)
背景情况:
- 在试管婴儿中,5日 (D5) 囊通常比6日 (D6) 囊更受欢迎,因为它们的质量更高.
- 对于D5和D6胚芽细胞之间的具体差异,特别是关于细胞系标记物和临床结果的理解有限.
研究的目的:
- 为了比较经冷解胚胎移植后等级D5和D6芽细胞之间的临床怀孕和活产率.
- 为了研究与细胞系相关的差异,特别是OCT4 (多能标记物) 和GATA3 (热质体标记物) 表达,在D5和D6胚芽细胞之间.
主要方法:
- 774个冷解单胞胎转移周期的回顾性分析.
- 对OCT4和GATA3进行免疫光染色,以评估内细胞质量 (ICM) 和托菲克托德 (TE) 细胞数量.
- 定量逆转录聚合酶连锁反应 (qRT-PCR) 用于OCT4和GATA3.3的基因表达分析.
主要成果:
- 显著更高的生物化学怀孕 (71.8%对52.3%),临床怀孕 (66.7%对47.7%),和活产率 (59.5%对37.9%) 观察到D5芽细胞与D6芽细胞相比D5芽细胞.
- 在相同等级的D5和D6芽细胞体之间,在总TE,ICM或细胞数量方面没有发现显著差异.
- 在D6胚胎中观察到OCT4阳性细胞的显著减少 (49%在D6 vs 64%在D5) 和较低的OCT4/GATA3比率,这表明多能性降低.
结论:
- 高等级的D5胚胎囊与高等级的D6胚胎囊相比,产生更高的活产率.
- 在D6胚芽细胞中活产率的降低可能归因于OCT4表达的降低,这表明发育潜力的潜在下降,而不是TE细胞增殖的差异.
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