Presence of a modifier gene(s) affecting early renal carcinogenesis in the Tsc2 mutant (Eker) rat model

  • Authors:
    • Yasushi Kikuchi
    • Akemi Sudo
    • Hiroaki Mitani
    • Okio Hino
  • View Affiliations

  • Published online on: January 1, 2004     https://doi.org/10.3892/ijo.24.1.75
  • Pages: 75-80
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Abstract

The Eker (Tsc2 mutant) rat model of renal carcinoma is an example of Mendelian dominantly inherited predisposition to a specific cancer. Effects of genetic background on renal carcinogenesis in the Eker rat model (Eker/Eker > Eker/BN strain) indicate the presence in the BN rat genome of a modifier gene(s) that suppresses tumorigenesis. The identification of such a modifier gene(s) might help clarify the diversity of tuberous sclerosis in humans. i) We found that preneoplastic lesions in 8-week-old F1 rats [(Eker x LE) and (Eker x BN)] were more numerous in the LE strain than in the BN strain although the difference was not large. ii) We next administered N-ethyl-N-nitrosourea (ENU; single injection, i.p.) at the age of 4 weeks to amplify the strain difference in tumorigenesis, as we had done in an earlier study to identify the predisposing gene. iii) This experiment was also done in BN congenic Eker rats to confirm the strain difference in tumorigenesis. Preneoplastic lesions were fewer in BN congenic rats than in Eker rats by a factor of 100. We used this ENU system to perform a backcross experiment [F1(Eker x BN) x Eker] and finally succeeded in mapping a new modifier locus on rat chromosome 5 (the LOD score of the D5Rat12 was 3.13).

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January 2004
Volume 24 Issue 1

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

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APA
Kikuchi, Y., Sudo, A., Mitani, H., & Hino, O. (2004). Presence of a modifier gene(s) affecting early renal carcinogenesis in the Tsc2 mutant (Eker) rat model. International Journal of Oncology, 24, 75-80. https://doi.org/10.3892/ijo.24.1.75
MLA
Kikuchi, Y., Sudo, A., Mitani, H., Hino, O."Presence of a modifier gene(s) affecting early renal carcinogenesis in the Tsc2 mutant (Eker) rat model". International Journal of Oncology 24.1 (2004): 75-80.
Chicago
Kikuchi, Y., Sudo, A., Mitani, H., Hino, O."Presence of a modifier gene(s) affecting early renal carcinogenesis in the Tsc2 mutant (Eker) rat model". International Journal of Oncology 24, no. 1 (2004): 75-80. https://doi.org/10.3892/ijo.24.1.75