Src inhibition induces mitotic arrest associated with chromosomal passenger complex.
Song Yang1, Youguang Luo2, Mulin Yang3
1Department of Cell Biology School of Basic Medical Sciences Cheeloo College of Medicine, Shandong University, Jinan, China.
Cell and Tissue Research
|March 29, 2023
Summary
The non-receptor tyrosine kinase Src is crucial for cell division and is overactivated in cancer. Inhibiting Src disrupts mitosis by affecting the chromosomal passenger complex, offering new cancer therapy insights.
Area of Science:
- Cell Biology
- Cancer Biology
- Molecular Oncology
Background:
- The non-receptor tyrosine kinase Src is implicated in cell division, migration, adhesion, and survival.
- Src is frequently overactivated in various cancers, promoting tumor progression and survival.
- The precise mechanisms of Src's role in cancer and mitosis are not fully understood.
Purpose of the Study:
- To investigate the role of Src in mitosis and its interaction with the chromosomal passenger complex.
- To elucidate the molecular mechanisms by which Src influences cell division and chromosome segregation.
- To provide insights into the therapeutic potential of Src inhibitors in cancer treatment.
Main Methods:
- Analysis of Src conservation across species.
- Microscopy to determine Src localization during mitosis.
- Src knockdown and inhibition experiments.
- Western blotting and co-immunoprecipitation to study protein interactions and phosphorylation.
- Assessment of spindle formation and chromosome segregation.
Main Results:
- Src is highly conserved and its expression increases during mitosis, localizing to the chromosomal passenger complex.
- Src knockdown or inhibition leads to multipolar spindle formation and abnormal expression of Aurora B and INCENP.
- Src directly interacts with and phosphorylates INCENP, disrupting chromosome arrangement and segregation.
- Src inhibition impedes mitotic progression by inducing multipolar spindles.
Conclusions:
- Src and the chromosomal passenger complex co-localize during mitosis.
- Src plays a critical role in regulating mitotic progression and chromosome segregation.
- Targeting Src may be a viable strategy for cancer therapy by disrupting cell division.
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