Biochemical Genetics

, Volume 30, Issue 11–12, pp 545–556 | Cite as

Restriction fragment length polymorphism (RFLP) analysis provides evidence for a high degree of homology of mitochondrial DNAs from rat hepatomasVersus normal rat livers

  • Richard A. Nakashima
  • Xin Li
  • J. Mark Bayouth
  • W. Christian Wigley


Where differences have been reported between tumor and normal mitochondrial DNA (mtDNA), they have generally involved limited modifications of the genome (Tairaet al., Nucleic Acids Res. 11:1635, 1983; Shay and Werbin,Mutat. Res. 186:149, 1987). However, Corralet al. (Nucleic Acids Res. 16:10935, 1988;17:5191, 1989) observed recombination between cytochrome oxidase subunit I (COI) and NADH dehydrogenase subunit 6 (ND6), two genes normally on opposite sides of the circular mitochondrial genome. In rat hepatoma mtDNA COI and ND6 were reported to be separated by only 230 base pairs (Corralet al., 1988, 1989). We have performed RFLP analysis on mtDNA from normal rat livers and rat hepatomas, using COI and ND6 probes. Additional experiments compared end-labeled DNA fragments produced byEcoRI andHindIII digestion of mtDNA. These studies failed to provide any evidence for genetic recombination in rat hepatoma mtDNA, even in the same cell line used by Corralet al. Rather, they support the conclusion that mtDNA from tumor and normal tissues exhibits a low degree of heterogeneity.

Key words

mitochondrial DNA Rattus norvegicus hepatoma restriction fragment length polymorphism 


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Copyright information

© Plenum Publishing Corporation 1992

Authors and Affiliations

  • Richard A. Nakashima
    • 1
  • Xin Li
    • 1
  • J. Mark Bayouth
    • 1
  • W. Christian Wigley
    • 1
  1. 1.Department of Chemistry and BiochemistryTexas Tech UniversityLubbock

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