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On the role of aurora-A in centrosome function
Stéphanie Dutertre1, Simon Descamps, Claude Prigent
1Groupe Cycle Cellulaire, UMR 6061 Génétique et développement, CNRS-Université de Rennes I, IFR 97 Génomique Fonctionnelle et Santé, Faculté de Médecine, 2 avenue du Pr Leon Bernard, CS 34317, 35043 Rennes cedex, France.
Oncogene
|September 6, 2002
Summary
Mammalian aurora-A kinase is crucial for cell division, controlling centrosome duplication and spindle assembly. Its overexpression is linked to cancer, suggesting aurora-A is an oncogene.
Area of Science:
- Cell Biology
- Molecular Biology
- Cancer Research
Background:
- Aurora-A is a mitotic serine/threonine kinase, part of a larger family including aurora-B and aurora-C.
- Aurora-A localizes to centrosomes during S phase after centriole duplication and is degraded in early G1.
- Its function is conserved across evolution for controlling chromosome segregation.
Purpose of the Study:
- To review the role of mammalian aurora-A in cell division.
- To investigate the link between aurora-A and cancer development.
Main Methods:
- Literature review of studies on aurora-A function in various organisms.
- Analysis of experimental data linking aurora-A overexpression to cellular transformation and tumor formation.
Main Results:
- Aurora-A regulates centrosome separation, duplication, maturation, and bipolar spindle assembly.
- Overexpression of aurora-A in human cells correlates with tumor grade and leads to polyploidy and centrosome amplification.
- Ectopic aurora-A expression in NIH3T3 cells induces anchorage-independent growth and tumor formation in mice.
Conclusions:
- Aurora-A is a critical regulator of mitosis and centrosome dynamics.
- Aurora-A acts as an oncogene, with its overexpression contributing to tumorigenesis.