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Adenovirus-mediated transfer of wild-type p53 gene results in apoptosis or growth arrest in human cultured gastric carcinoma cells.

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We examined the susceptibility of six human gastric carcinoma cell lines to infection with recombinant p53 adenovirus vector (AxCA-p53). AxCA-p53 infection at a muliplicity of infection (MOI) of 50 resulted in apoptotic cell death (MKN-1 cells), growth arrest (MKN-45, MKN-74 and KATO-III cells), or non-effectiveness (TMK-1 and OCUM-2M cells). Western blot analysis revealed increasing expression levels of p21/WAF1 protein after infection with AxCA-p53 in all the cell lines. After infection with AxCA-p53, the expression levels of bax or bcl-XL protein changed in MKN-1, but not in the other cell lines. These results suggest that the apoptotic pathway (dependence on the expressions of bcl-2 family proteins) dominates the growth arrest pathway (dependence on the expressions of p21/WAF1 protein) after infection with AxCA-p53. Thus, the bcl-2 family might play a crucial role in p53-mediated growth arrest and apoptosis in human gastric carcinoma cells.
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Document Type: Research Article

Affiliations: First Department of Pathology, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8503, Japan.

Publication date: January 1, 1999

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  • The International Journal of Oncology provides an international forum for the publication of the latest, cutting-edge research in the broad area of oncology and cancer treatment. The journal accepts original high quality works and reviews on all aspects of oncology research including carcinogenesis, metastasis, epidemiology, chemotherapy and viral oncology. Through fair and efficient peer review, the journal is dedicated to publishing top tier research in the field, offering authors rapid publication as well as high standards of copy-editing and production. The International Journal of Oncology is published on a monthly basis in both print and early online.
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