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DNA copy number aberrations and disruption of the p16INK4a/Rb pathway in radiation-induced and spontaneous rat mammary carcinomas
https://repo.qst.go.jp/records/70372
https://repo.qst.go.jp/records/70372a70524c1-e873-49df-b2c0-534a5450a26e
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2010-12-24 | |||||
| タイトル | ||||||
| タイトル | DNA copy number aberrations and disruption of the p16INK4a/Rb pathway in radiation-induced and spontaneous rat mammary carcinomas | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Iizuka, Daisuke
× Iizuka, Daisuke× Imaoka, Tatsuhiko× Takabatake, Takashi× Nishimura, Mayumi× Kakinuma, Shizuko× Nishimura, Yukiko× Shimada, Yoshiya× 飯塚 大輔× 今岡 達彦× 高畠 貴志× 西村 まゆみ× 柿沼 志津子× 西村 由希子× 島田 義也 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Chromosomal amplifications and deletions are thought to be important events in spontaneous and radiation-induced carcinogenesis. To clarify how ionizing radiation induces mammary carcinogenesis, we characterized genomic copy number aberrations for gamma-ray-induced rat mammary carcinomas using microarray-based comparative genomic hybridization. We examined 14 carcinomas induced by gamma radiation (2 Gy) and found 26 aberrations, including trisomies of chromosomes 4 and 10 for three and one carcinomas, respectively, an amplification of the chromosomal region 1q12 in two carcinomas, and deletions of the chromosomal regions 3q35q36, 5q32 and 7q11 in two, two and four carcinomas, respectively. These aberrations were not observed in seven spontaneous mammary carcinomas. The expression of p16Ink4a and p19Arf, which are located in the chromosomal region 5q32, was always up-regulated except for a carcinoma with a homozygous deletion of region 5q32. The up-regulation was not accounted for by gene mutations or promoter hypomethylation. However, the amounts of Rb and its mRNA were down-regulated in these carcinomas, indicating a disruption of the p16Ink4a/Rb pathway. This is the first report of array CGH analysis for radiation-induced mammary tumors, which reveals that they show distinct DNA copy number aberration patterns that are different from those of spontaneous tumors and those reported previously for chemically induced tumors. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | The 20th International Symposium of Hiroshima Cancer Seminar in conjunction with Three Universities' Consortium | |||||
| 発表年月日 | ||||||
| 日付 | 2010-10-31 | |||||
| 日付タイプ | Issued | |||||
