Gene expression profile of DNA binding protein A transgenic mice

  • Authors:
    • Hiroshi Tobita
    • Kazunori Kajino
    • Kouichi Inami
    • Sayaka Kano
    • Mahmut Yasen
    • Osamu Imamura
    • Yoshikazu Kinoshita
    • Okio Hino
  • View Affiliations

  • Published online on: September 1, 2006     https://doi.org/10.3892/ijo.29.3.673
  • Pages: 673-679
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Abstract

We recently reported that the expression of dbpA (DNA binding protein A) is associated with advanced stages of human hepatocellular carcinoma (HCC) and that its transcription is positively regulated by E2F1, which is also implicated in hepatocarcinogenesis. To study the in vivo effect of dbpA on hepatocarcinogenesis, we generated the dbpA-transgenic mouse that specifically expressed a transgene in hepatocytes. Here, we studied the effect of dbpA on the expression of other cellular genes by using microarray analyses. The expression profiles from livers of 31- and 32-week-old male transgenic mice [Tg(+)] that did not show any morphological changes and from livers of their male wild-type littermates [Tg(−)] were compared. Expression differences detected by microarray analyses were validated by reverse transcription-polymerase chain reaction (RT-PCR) using total RNA samples from livers of 3 pairs of Tg(+) and (−) mice. The 11 up-regulated genes included 7 carcinogenesis-related genes (Igfbp1, Tff3, Hpx, Orm2, Ctsl, Plg, Jdp1), and the 9 down-regulated genes included Car3 that is associated with the protection of cells from attack by oxygen radicals. We confirmed that the expression of Igfbp1 (insulin like growth factor binding protein 1) was reduced by siRNA targeting dbpA in the human HCC cell line. In conclusion, our present data suggested that dbpA could be positively involved in carcinogenesis by changing the expression profiles of cellular genes.

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September 2006
Volume 29 Issue 3

Print ISSN: 1019-6439
Online ISSN:1791-2423

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APA
Tobita, H., Kajino, K., Inami, K., Kano, S., Yasen, M., Imamura, O. ... Hino, O. (2006). Gene expression profile of DNA binding protein A transgenic mice. International Journal of Oncology, 29, 673-679. https://doi.org/10.3892/ijo.29.3.673
MLA
Tobita, H., Kajino, K., Inami, K., Kano, S., Yasen, M., Imamura, O., Kinoshita, Y., Hino, O."Gene expression profile of DNA binding protein A transgenic mice". International Journal of Oncology 29.3 (2006): 673-679.
Chicago
Tobita, H., Kajino, K., Inami, K., Kano, S., Yasen, M., Imamura, O., Kinoshita, Y., Hino, O."Gene expression profile of DNA binding protein A transgenic mice". International Journal of Oncology 29, no. 3 (2006): 673-679. https://doi.org/10.3892/ijo.29.3.673