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Genetic research

Replication Timing and Gene Expression in Early Embryos Show Cell-Type Specificity and Correlate with Gene Activity

Strategic Insights

— 1 min read

Research conducted at the University of Minnesota has shed light on the replication timing (RT) and gene expression in early mouse embryos. The study, published in Communications Biology, suggests that RT is established at the 1-cell stage prior to zygote gene activation (ZGA) and that late replicating regions correlate with higher gene expression and open chromatin in early developing embryos. The findings have significant implications for our understanding of gene regulation and development.

Key Takeaways:

  • The study used a single-cell multiomics approach to analyze RT and gene expression in individual cells of mouse 1-cell, 2-cell, and 4-cell embryos.
  • The results showed that RT is established at the 1-cell stage prior to ZGA, indicating a cell-type specific regulation of gene expression.
  • Late replicating regions were found to correlate with higher gene expression and open chromatin in early developing embryos.
  • The study also demonstrated an integrated pseudo time trajectory analysis combining RT and gene expression information per cell.
  • The research was conducted by Anala V. Shetty and Clifford J. Steer from the Molecular, Cellular, Developmental Biology and Genetics Graduate Program at the University of Minnesota.
  • The study provides new insights into the control of gene expression in early mouse embryos and has implications for our understanding of gene regulation and development.

Statistics:

  • The study analyzed individual cells of mouse 1-cell, 2-cell, and 4-cell embryos.
  • The research found that RT is established at the 1-cell stage prior to ZGA.
  • Late replicating regions correlated with higher gene expression and open chromatin in early developing embryos.
  • The study used an integrated pseudo time trajectory analysis combining RT and gene expression information per cell.
  • The research has significant implications for our understanding of gene regulation and development in early developing embryos.

Sources:

  • NewsRx LLC. Researchers from University of Minnesota Publish Findings in Biology (Single cell multiomics approach to analyze replication timing and gene expression in mouse preimplantation embryos). Life Science Weekly. September 9, 2025; p 4744.
  • Shetty, AV, Steer, CJ, Low, WC. Single cell multiomics approach to analyze replication timing and gene expression in mouse preimplantation embryos. Communications Biology, 2025,8(1):1-10. (Communications Biology - http://www.nature.com/commsbio).

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