Related Experiment Videos
Is nuclear envelope re-formation an inducible event?
Experimental Cell Research
|July 1, 1987
Summary
Nuclear envelope reformation in multinucleate cells is inducible and occurs synchronously once any nucleus reaches telophase. This event is independent of chromatin condensation, suggesting a novel regulatory mechanism during mitosis.
Area of Science:
- Cell Biology
- Molecular Biology
- Genetics
Background:
- Multinucleate cells exhibit near-synchronous nuclear progression through mitosis until metaphase.
- Postmetaphase events like nuclear envelope reformation and chromosome decondensation can show asynchrony.
Purpose of the Study:
- To investigate the timing and regulation of nuclear envelope reformation during asynchronous postmetaphase progression in multinucleate cells.
- To determine if nuclear envelope reformation is dependent on chromatin condensation state.
Main Methods:
- Ultrastructural analysis of multinucleate cells undergoing asynchronous mitosis.
- Observation of nuclear envelope reformation, chromosome decondensation, and spindle dynamics.
Main Results:
- Nuclear envelope reformation initiated synchronously across all chromosome groups upon the earliest completion of telophase.
- This synchronous reformation occurred irrespective of the mitotic stage of other nuclei.
- The process was independent of the chromatin's condensation or decondensation state.
Conclusions:
- Nuclear envelope reformation is an inducible event triggered by a specific cellular signal, not chromatin state.
- A regulatory factor, potentially antagonistic to the maturation-promoting factor, may control this synchronous reformation.