Abstract:
:Aurora kinases are known to play a key role in maintaining mitotic fidelity, and overexpression of aurora kinases has been noted in various tumors. Overexpression of aurora kinase activity is thought to promote cancer development through a loss of centrosome or chromosome number integrity. Here we observed augmentation of G12V-mutated HRAS-induced neoplastic transformation in BALB/c 3T3 A31-1-1 cells transfected with Aurora-A. Aurora-A-short hairpin RNA (shRNA) experiments showed that the expression level of Aurora-A determines susceptibility to transformation. Aurora-A gene amplification was noted in human patients with tongue or gingival squamous carcinoma (4/11). Amplification was observed even in pathologically normal epithelial tissue taken at sites distant from the tumors in two patients with tongue cancer. However, overexpression of Aurora-A mRNA was observed only within the tumors of all patients examined (11/11). Our data indicate that Aurora-A gene amplification and overexpression play a role in human carcinogenesis, largely due to the effect of Aurora-A on oncogenic cell growth, rather than a loss of maintenance of centrosomal or chromosomal integrity.
journal_name
Oncogenejournal_title
Oncogeneauthors
Tatsuka M,Sato S,Kitajima S,Suto S,Kawai H,Miyauchi M,Ogawa I,Maeda M,Ota T,Takata Tdoi
10.1038/sj.onc.1208293subject
Has Abstractpub_date
2005-02-03 00:00:00pages
1122-7issue
6eissn
0950-9232issn
1476-5594pii
1208293journal_volume
24pub_type
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