Uncovering a Novel Mechanism in Chromosome Segregation: Research Reveals Asymmetric Regulation of Anaphase A

Strategic Insights -

Researchers at Durham University have made a groundbreaking discovery in the field of cell biology, uncovering a novel mechanism in chromosome segregation during anaphase A in Caenorhabditis elegans embryos. According to the study, published in the Journal of Cell Biology, this mechanism is driven by the kinesin-13 KLP-7MCAK and opposed by the kinesin-12 KLP-18. The findings reveal an unexpected role for anaphase A in early C. elegans development and highlight the importance of mechanical coordination between anaphase A and anaphase B-driven chromosome segregation.

Key Takeaways:

  • The study discovered a novel mechanism of anaphase A in C. elegans embryos, driven by the kinesin-13 KLP-7MCAK and opposed by the kinesin-12 KLP-18.
  • The mechanism is asymmetrically regulated by cell polarity cues and modulated by mechanical tension within the spindle.
  • The contribution of anaphase A to chromosome segregation increases progressively across early embryonic divisions.
  • The findings uncover an unexpected role for anaphase A in early C. elegans development.
  • The research reveals a KLP-7MCAK-dependent mechanical coordination between anaphase A- and anaphase B-driven chromosome segregation.
  • The study highlights the importance of mechanical tension within the spindle in regulating chromosome segregation.
  • The research was funded by the Centre National de la Recherche Scientifique, University Paris Cite, National Institutes of Health, and European Research Council.
  • The additional authors of the study include Ana M. Dias Maia Henriques, Serge Dmitrieff, Nicolas Minc, Julie C. Canman, Julien Dumont, and Gilliane Maton.

Statistics:

  • The study was reported in the Journal of Cell Biology, Volume 225, Issue 1, 2025.
  • The research was funded by a total of 4 organizations: Centre National de la Recherche Scientifique, University Paris Cite, National Institutes of Health, and European Research Council.
  • The study involved a team of researchers from Durham University, including Timothy R. Davies, Ana M. Dias Maia Henriques, Serge Dmitrieff, Nicolas Minc, Julie C. Canman, Julien Dumont, and Gilliane Maton.
  • The news release reported that the research has been peer-reviewed.
  • The study used Caenorhabditis elegans embryos as the subject of research.

Sources:

  • NewsRx. Study Data from Durham University Update Knowledge of Cell Biology (Mechanical coordination between anaphase A and B drives asymmetric chromosome segregation). Life Science Weekly. November 4, 2025; p 7378.
  • Mechanical coordination between anaphase A and B drives asymmetric chromosome segregation. Journal of Cell Biology, 2025;225(1).