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Tumorigenesis in the multiple intestinal neoplasia mouse: redundancy of negative regulators and specificity of modifiers.

The interaction between mutations in the tumor-suppressor genes Apc and p53 was studied in congenic mouse strains to minimize the influence of polymorphic modifiers. The multiplicity and invasiveness of intestinal adenomas of Apc(Min/+) (Min) mice was enhanced by deficiency for p53. In addition, the occurrence of desmoid fibromas was strongly enhanced by p53 deficiency. The genetic modifier Mom1 and the pharmacological agents piroxicam and difluoromethylornithine each reduced intestinal adenoma multiplicity in the absence of p53 function. Mom1 showed no influence on the development of desmoid fibromas, whereas the combination of piroxicam and difluoromethylornithine exerted a moderate effect. The ensemble of tumor suppressors and modifiers of a neoplastic process can be usefully analyzed in respect to tissue specificity and synergy.

Pubmed ID: 10716720


  • Halberg RB
  • Katzung DS
  • Hoff PD
  • Moser AR
  • Cole CE
  • Lubet RA
  • Donehower LA
  • Jacoby RF
  • Dove WF


Proceedings of the National Academy of Sciences of the United States of America

Publication Data

March 28, 2000

Associated Grants

  • Agency: NCI NIH HHS, Id: CA 07175
  • Agency: NCI NIH HHS, Id: CA 50585
  • Agency: NCI NIH HHS, Id: N01 CN 65122

Mesh Terms

  • Adenoma
  • Animals
  • Eflornithine
  • Female
  • Fibromatosis, Aggressive
  • Genes, APC
  • Genes, p53
  • Intestinal Neoplasms
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Neoplasms, Multiple Primary
  • Piroxicam