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| Content Provider | Springer Nature Link |
|---|---|
| Author | Yamada, Yutaka Nakata, Akifumi Yoshida, Mitsuaki A. Shimada, Yoshiya Oghiso, Yoichi Poncy, Jean Luc |
| Copyright Year | 2010 |
| Abstract | To investigate whether p16 inactivation is involved in the development of rat pulmonary tumors, we compared the p16 status and tumorigenicity of cell lines which indicated different p16 status. The tumor cell line (PuD2) was established from lung adenocarcinoma induced in plutonium dioxide-inhaled rat in this study. The virus-immortalized SV40T2 cells, benzo[a]pyrene-induced BP cells, BP-derived BP(P)Tu cells, and gamma ray-transformed RTiv3 cells were utilized as the respiratory epithelial cell lines. A tumorigenicity assay-inoculating cells into nude mice revealed that PuD2, BP, and BP(P)Tu cells were tumorigenic, but SV40T2 and RTiv3 cells were not. Methylation-specific PCR of the p16 promoter region revealed that SV40T2 cells were unmethylated, BP cells displayed heterogeneous methylation, and BP(P)Tu and RTiv3 cells were completely methylated. Methylation-specific PCR and PCR of genomic DNA in the p16 region did not amplify product in PuD2 cells, indicating deletion of p16. Banded karyotypes prepared from PuD2 cells exhibited trisomy of chromosome 4, inversion in chromosome 11, and partial deletion of chromosomes 4 and 5. The demethylating agent 5Aza2dC partially demethylated the p16 promoter region of BP(P)Tu, BP and RTiv3 cells, increasing expression of the p16 transcript and decreasing growth of the cells. These results indicate that hypermethylation of the p16 promoter region occurs early in neoplastic transformation before acquisition of tumorigenicity in rat respiratory epithelium. Loss of genes located on chromosomes 4 and 5 may be important for tumor progression and acquisition of high tumorigenic activity in the Pu-induced rat lung tumor. |
| Starting Page | 477 |
| Ending Page | 486 |
| Page Count | 10 |
| File Format | |
| ISSN | 10712690 |
| Journal | In Vitro Cellular & Developmental Biology - Animal |
| Volume Number | 46 |
| Issue Number | 5 |
| e-ISSN | 1543706X |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2010-02-05 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Tumor suppressor gene Methylation Chromosome aberration Alpha emitter p53 Nude mouse Animal Genetics and Genomics Cell Culture Stem Cells Developmental Biology Cell Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Developmental Biology Medicine |
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