Related Experiment Videos
Cytochalasin D-induced triploidy in the mouse
1Department of Anatomy, University Medical School, Edinburgh, Scotland.
The Journal of Experimental Zoology
|June 1, 1989
Summary
Researchers developed a method to create digynic triploid mouse embryos using cytochalasin D. This technique allows for the study of triploid development compared to normal diploid embryos.
Area of Science:
- Developmental Biology
- Genetics
- Reproductive Science
Background:
- Previous methods for inducing digynic triploidy in mice had limited success, often resulting in heteroploid conceptuses.
- Understanding triploid development is crucial for studying genetic abnormalities and developmental potential.
Purpose of the Study:
- To establish a reliable in vivo method for inducing digynic triploid mouse conceptuses.
- To investigate the critical timing for inducing triploidy during meiosis.
Main Methods:
- Administering a single intraperitoneal injection of cytochalasin D to recently mated female mice.
- Timing the injection to a specific window during the second meiotic division, coinciding with second polar body extrusion.
- Utilizing a paternally derived marker chromosome for cytogenetic analysis.
Main Results:
- Successfully induced digynic triploidy in 14-18% of conceptuses at day 10 of gestation.
- Demonstrated that cytochalasin D exposure must occur during a critical phase of the second meiotic division.
- Confirmed the induction of digynic triploidy, with no diandric triploidy observed.
Conclusions:
- The described method provides a simple and direct approach for generating digynic triploid mouse conceptuses.
- This technique enables direct comparison of digynic triploid development with normal diploid littermates.
- The findings highlight the precise temporal requirements for chemical induction of triploidy.