Dual Causes of Early Human Embryonic Developmental Arrest: Insights and Perspectives at The Subcellular Scale
- 1College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Abstract
In human assisted reproductive technology (ART), embryos experience an extremely high rate of developmental arrest (over 50%) during the 5-day developmental window prior to blastocyst formation, which constitutes a major bottleneck limiting clinical pregnancy rates. A recent paper published in Cell titled “Two distinct causes contribute to the low efficiency of human pre-implantation development” reveals the two independent causes underlying this phenomenon. Utilizing a custom-developed high-throughput dual-view live-cell light-sheet microscope, the research team achieved the first continuous live-cell imaging of human and non-human primate embryos with high spatiotemporal resolution for up to 120 h. The study discovered that embryos are highly prone to errors during the second mitosis. Multipolar spindle assembly, triggered by centriole overduplication, leads to chromosome segregation errors and micronuclei formation, which subsequently induces early developmental arrest (prior to the 8-cell stage). Conversely, late developmental arrest (on day 4) is primarily driven by the endoplasmic reticulum (ER) stress response. Furthermore, the study demonstrated that transient treatment with a PLK4 inhibitor (centrinone) can effectively prevent spindle defects at the 2-cell stage. This research not only reshapes our understanding of the developmental dynamics of human pre-implantation embryos but also provides new insights into the mechanisms underlying human pre-implantation developmental arrest and offers valuable references for future studies on assisted reproduction and potential intervention strategies.
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BibTeX
@article{yanan2026dual,
title = {{Dual Causes of Early Human Embryonic Developmental Arrest: Insights and Perspectives at The Subcellular Scale}},
author = {LÜ Ya-Nan and GUO Yu-Ting},
journal = {Shengwu huaxue yu shengwu wuli jinzhan},
year = {2026},
month = oct,
doi = {10.3724/j.pibb.2026.0323},
url = {https://doi.org/10.3724/j.pibb.2026.0323},
note = {CC BY-NC},
}
RIS
TY - JOUR
TI - Dual Causes of Early Human Embryonic Developmental Arrest: Insights and Perspectives at The Subcellular Scale
AU - LÜ Ya-Nan
AU - GUO Yu-Ting
PY - 2026
DA - 2026/10/26
JO - Shengwu huaxue yu shengwu wuli jinzhan
DO - 10.3724/j.pibb.2026.0323
UR - https://doi.org/10.3724/j.pibb.2026.0323
AB - In human assisted reproductive technology (ART), embryos experience an extremely high rate of developmental arrest (over 50%) during the 5-day developmental window prior to blastocyst formation, which constitutes a major bottleneck limiting clinical pregnancy rates. A recent paper published in Cell titled “Two distinct causes contribute to the low efficiency of human pre-implantation development” reveals the two independent causes underlying this phenomenon. Utilizing a custom-developed high-throughput dual-view live-cell light-sheet microscope, the research team achieved the first continuous live-cell imaging of human and non-human primate embryos with high spatiotemporal resolution for up to 120 h. The study discovered that embryos are highly prone to errors during the second mitosis. Multipolar spindle assembly, triggered by centriole overduplication, leads to chromosome segregation errors and micronuclei formation, which subsequently induces early developmental arrest (prior to the 8-cell stage). Conversely, late developmental arrest (on day 4) is primarily driven by the endoplasmic reticulum (ER) stress response. Furthermore, the study demonstrated that transient treatment with a PLK4 inhibitor (centrinone) can effectively prevent spindle defects at the 2-cell stage. This research not only reshapes our understanding of the developmental dynamics of human pre-implantation embryos but also provides new insights into the mechanisms underlying human pre-implantation developmental arrest and offers valuable references for future studies on assisted reproduction and potential intervention strategies.
SN - 1000-3282
ER -