About   Help   FAQ
Phenotypes Associated with This Genotype
Genotype
MGI:3773346
Allelic
Composition
Ctnnb1tm4Wbm/Ctnnb1tm4Wbm
Tg(Pdx1-cre)6Tuv/0
Genetic
Background
involves: 129P2/OlaHsd * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ctnnb1tm4Wbm mutation (1 available); any Ctnnb1 mutation (51 available)
Tg(Pdx1-cre)6Tuv mutation (3 available)
phenotype observed in females
phenotype observed in males
N normal phenotype

Ctnnb1tm4Wbm/Ctnnb1tm4Wbm Tg(Pdx1-cre)6Tuv/? pancreata display extensive loss of exocrine tissue

mortality/aging
• shortened lifespan, with a median survival of 29 days, although some mice do survive more than 6 months

growth/size/body
• small body size at birth that persists into adulthood

endocrine/exocrine glands
• in 17% of mutants that survived beyond 3 months, the pancreas has a liver-like histology
• numerous tubular structures suggesting pancreas acinar to duct metaplasia, however islets are intact
• acinar hypoplasia is seen by E16.5 and by 2 months of age, there is a near complete absence of acinar cell structures
• pancreas weighs on average 30% less than wild-type
• increase in parenchymal fibrosis
• decrease in the proliferation rate of pancreatic exocrine progenitors
• variable degree of surrounding inflammatory infiltrate which becomes more severe by 1 month of age; inflammatory infiltrate is reminiscent of pancreatitis

immune system
• variable degree of surrounding inflammatory infiltrate which becomes more severe by 1 month of age; inflammatory infiltrate is reminiscent of pancreatitis

digestive/alimentary system
• numerous tubular structures suggesting pancreas acinar to duct metaplasia, however islets are intact
• acinar hypoplasia is seen by E16.5 and by 2 months of age, there is a near complete absence of acinar cell structures


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)
Citing These Resources
Funding Information
Warranty Disclaimer, Privacy Notice, Licensing, & Copyright
Send questions and comments to User Support.
last database update
01/06/2026
MGI 6.24
The Jackson Laboratory