Aur-A Stabilization in Cancer
Author Information
Author(s): Kitajima Shojiro, Kudo Yasusei, Ogawa Ikuko, Tatsuka Masaaki, Kawai Hidehiko, Pagano Michele, Takata Takashi
Primary Institution: Hiroshima University
Hypothesis
Aberration of the protein destruction system induces accumulation and consequently overexpression of Aur-A in cancer.
Conclusion
This study identifies a new mode of Aur-A overexpression in cancer through phosphorylation-dependent inhibition of its proteolysis.
Supporting Evidence
- Aur-A protein was found to be overexpressed in head and neck cancer cells without gene amplification.
- Phosphorylation on Ser51 was detected in head and neck cancer tissues with Aur-A protein overexpression.
- Constitutive phosphorylation on Ser51 was observed in cancer cells, suggesting a mechanism for Aur-A stabilization.
Takeaway
In some cancers, a protein called Aur-A doesn't get broken down like it should, which makes it build up and can help cancer grow.
Methodology
The study involved examining the phosphorylation status of Aur-A in head and neck cancer cell lines and tissues, along with experiments to assess protein degradation and transformation potential.
Limitations
The study did not find a correlation between PP2A expression and Aur-A Ser51 phosphorylation status in cancer cell lines.
Participant Demographics
Head and neck cancer patients, with tissue samples collected from 9 cases.
Digital Object Identifier (DOI)
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