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Live Cell Imaging of Chromosome Segregation During Mitosis
Published on: March 14, 2018
LSD1 is required for chromosome segregation during mitosis.
Shuang Lv1, Wenjuan Bu, Hong Jiao
1Laboratory of Cancer Biology, College of Life Sciences, Capital Normal University, 105 Xi San Huan Road (N), Beijing, China.
European Journal of Cell Biology
|March 2, 2010
Summary
Lysine-specific demethylase 1 (LSD1) regulates cell division by controlling gene expression of key proteins involved in chromosome segregation. Inhibition of LSD1 causes errors in mitosis, highlighting its critical role in cell cycle progression.
Area of Science:
- Molecular Biology
- Cell Biology
- Epigenetics
Background:
- Dynamic histone and non-histone protein methylation/demethylation is crucial for cell cycle regulation.
- Lysine-specific demethylase 1 (LSD1) modulates gene transcription by demethylating histone H3 lysine 4 (H3K4) and lysine 9 (H3K9).
Purpose of the Study:
- To investigate the role of LSD1 in chromosomal segregation during mitosis.
- To elucidate the molecular mechanisms by which LSD1 influences cell cycle progression.
Main Methods:
- Small interfering RNA (siRNA) was used to inhibit LSD1 expression.
- Analysis of chromosomal segregation, centrosome duplication, and protein levels of MAD2 and BUBR1.
- Assessment of BUBR1 and MAD2 promoter activity and H3K9 monomethylation status.
Main Results:
- LSD1 inhibition resulted in abnormal chromosomal segregation and centrosome duplication.
- Decreased protein levels of MAD2 and BUBR1 were observed upon LSD1 depletion.
- LSD1 positively regulates BUBR1 and MAD2 promoter activity and maintains H3K9 monomethylation.
Conclusions:
- LSD1 plays a significant role in ensuring accurate chromosomal segregation during mitosis.
- This function is partly mediated through the transcriptional regulation of BUBR1 and MAD2.
- LSD1's epigenetic regulation is vital for maintaining genomic stability during cell division.
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