{"id":2233,"date":"2024-07-08T01:04:42","date_gmt":"2024-07-07T17:04:42","guid":{"rendered":"https:\/\/sunshineivf.com.tw\/?p=2233"},"modified":"2025-06-12T01:06:16","modified_gmt":"2025-06-11T17:06:16","slug":"hello-world-49","status":"publish","type":"post","link":"https:\/\/sunshineivf.com.tw\/en\/hello-world-49\/","title":{"rendered":"New real-time imaging, non-invasive cell labeling technology"},"content":{"rendered":"
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New Real-Time Imaging, Non-Invasive Cell Labeling Technology Discovered<\/div>\n
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\u00a02 Cell stage embryos have only one of these cells<\/div>\n
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It will evolve into the 80% embryonic host, the future ectoderm, the endoderm (yolk sac) and the trophoblast (placenta).<\/div>\n
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\u00a0Labeling and live imaging of human embryos reveal that the majority of the future body originates, mostly, from one of the 2-cell stage blastomeres. Descendants of the first 2-cell stage blastomere to divide contribute more asymmetric divisions at the 8-cell stage, which generate the small number of founding epiblast cells before implantation. founding epiblast cells before implantation.\u00a0<\/div>\n
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https:\/\/www.cell.com\/action\/showPdf?pii=S0092-8674%2824%2900455-0<\/a><\/div>\n
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The first two blastomeres contribute unequally to the human embryo\u00a0\u00a0<\/div>\n
https:\/\/doi.org\/10.1016\/j.cell.2024.04.029\u00a0<\/a><\/div>\n
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SUMMARY\u00a0<\/div>\n
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Retrospective lineage reconstruction of humans predicts that dramatic clonal imbalances in the body can be traced to the 2-cell stage embryo. However, whether and how such clonal asymmetries arise in the embryo is unclear. Here, we performed prospective lineage tracing of human embryos using live imaging, non-invasive cell labeling, and computational predictive imaging. imaging, non-invasive cell labeling, and computational predictions to determine the contribution of each 2-cell stage blastomere to the epiblast ( body), hypoblast (yolk sac), and trophectoderm (placenta). We show that the majority of epiblast cells originate from only one blastomere of the 2-cell stage embryo. We observe that only one to three cells become internalized at the 8-to-16-cell stage. Moreover, these internalized cells are more frequently derived from the first cell to divide at the 2-cell stage. -We propose that cell division dynamics and a cell internalization bottleneck in the early embryo establish asymmetry in the clonal composition of the future human body. composition of the future human body.<\/div>\n
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