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Phenotypes Associated with This Genotype
Genotype
MGI:4420927
Allelic
Composition
Cdkn1atm1Tyj/Cdkn1atm1Tyj
Fahtm1Mgo/Fahtm1Mgo
Genetic
Background
involves: 129S2/SvPas * 129S7/SvEvBrd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cdkn1atm1Tyj mutation (3 available); any Cdkn1a mutation (63 available)
Fahtm1Mgo mutation (0 available); any Fah mutation (39 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
N
• mice survive NTBC withdrawal unlike similarly treated Fahtm1Mgo homozygotes

neoplasm
• 7 to 8 weeks following NTBC withdrawal and 8 weeks following low-dose NTBC treatment, mice develop hepatocellular carcinomas unlike similarly treated Fahtm1Mgo homozygotes
• tumors that develop following treatment with low-dose NTBC are smaller and fewer than those in mice following complete withdrawal of NTBC
• in 80% of mice 12 weeks after NTBC withdrawal

liver/biliary system
• following NTBC withdrawal, hepactocytes are dysplastic with increased DNA damage compared with cells from similarly treated Fahtm1Mgo homozygotes
• 7 to 8 weeks following NTBC withdrawal and 8 weeks following low-dose NTBC treatment, mice develop hepatocellular carcinomas unlike similarly treated Fahtm1Mgo homozygotes
• tumors that develop following treatment with low-dose NTBC are smaller and fewer than those in mice following complete withdrawal of NTBC
• following NTBC withdrawal, hepatocytes exhibit increased DNA damage compared with similarly treated cells from Fahtm1Mgo homozygotes
• following NTBC withdrawal
• following NTBC withdrawal unlike in similarly treated Fahtm1Mgo homozygotes

renal/urinary system
• 10 weeks after NTBC withdrawal, mice develop macroscopic cysts comprised of renal parenchyma unlike similarly treated Fahtm1Mgo homozygotes
• in 80% of mice 12 weeks after NTBC withdrawal
• following NTBC withdrawal

growth/size/body
• following NTBC withdrawal, mice exhibit weight loss with a plateau at 5 and 6 weeks after withdrawal compared with similarly treated Fahtm1Mgo homozygotes
• 10 weeks after NTBC withdrawal, mice develop macroscopic cysts comprised of renal parenchyma unlike similarly treated Fahtm1Mgo homozygotes

cellular
• following NTBC withdrawal
• following NTBC withdrawal unlike in similarly treated Fahtm1Mgo homozygotes


Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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last database update
01/28/2026
MGI 6.24
The Jackson Laboratory