Assessment of the flexed-tail mouse as a possible model for Fanconi anemia: analysis of mitomycin C-induced micronuclei

Mutat Res. 1996 Sep 13;370(2):99-106. doi: 10.1016/0165-1218(96)00044-4.


Fanconi anemia (FA) is a rare, autosomal recessive disorder characterized by elevated frequencies of chromosome aberrations, hypersensitivity to DNA cross-linking agents and predisposition to cancer. At least 5 complementation groups (FA-A to FA-E) underlie FA and the gene defective in FA-C (FAC) has been cloned. The mouse orthologue, Fac, maps in close proximity to the f locus, on chromosome 13, which codes for the flexed-tail mouse phenotype, raising the possibility that f and Fac are synonymous. If this were the case flexed-tail mice could be used as mouse models for FA-C to help determine the basic defect and to evaluate clinical intervention and gene therapy. To further characterize the flexed-tail mouse, the frequency of micronuclei (a measure of chromosomal aberrations) induced by mitomycin C (MMC), an alkylating and DNA cross-linking agent, was analyzed in peripheral blood and bone marrow erythrocytes. Although a higher spontaneous micronucleus frequency was seen in flexed tail mice in comparison to wild-type mice, the sensitivity to MMC was not elevated. This result suggests that f and Fac are different genes and that the flexed-tail mouse is not a model for FA-C.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antibiotics, Antineoplastic / toxicity*
  • Disease Models, Animal*
  • Dose-Response Relationship, Drug
  • Fanconi Anemia / genetics*
  • Female
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Micronuclei, Chromosome-Defective / drug effects*
  • Mitomycin / toxicity*


  • Antibiotics, Antineoplastic
  • Mitomycin