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Phenotypes Associated with This Genotype
Genotype
MGI:3578520
Allelic
Composition
Dicer1tm1Mmk/Dicer1tm1Mmk
Tg(Lck-cre)1Cwi/0
Genetic
Background
involves: C57BL/6 * DBA/2
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Dicer1tm1Mmk mutation (0 available); any Dicer1 mutation (95 available)
Tg(Lck-cre)1Cwi mutation (3 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
• unusually high percentage of thymocytes expressed TCR gamma-delta and gamma-delta cells were prevalent in the double negative compartment and decreased numbers of alpha-beta T cells
• decreased numbers of alpha-beta T cells
• cell numbers in thymi were reduced nearly 10-fold relative to controls, however there were normal numbers of double negative cells in thym
• increased percentage (43% versus 11% of wildtype at 6 hours and 68% versus 30% at 24 hours) of dying thymocytes when grown in vitro

hematopoietic system
• unusually high percentage of thymocytes expressed TCR gamma-delta and gamma-delta cells were prevalent in the double negative compartment and decreased numbers of alpha-beta T cells
• decreased numbers of alpha-beta T cells
• cell numbers in thymi were reduced nearly 10-fold relative to controls, however there were normal numbers of double negative cells in thym
• increased percentage (43% versus 11% of wildtype at 6 hours and 68% versus 30% at 24 hours) of dying thymocytes when grown in vitro

endocrine/exocrine glands
• cell numbers in thymi were reduced nearly 10-fold relative to controls, however there were normal numbers of double negative cells in thym
• increased percentage (43% versus 11% of wildtype at 6 hours and 68% versus 30% at 24 hours) of dying thymocytes when grown in vitro


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