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Phenotypes Associated with This Genotype
Genotype
MGI:3829016
Allelic
Composition
Ctcftm2Gal/Ctcftm2Gal
Tg(Lck-cre)1Cwi/0
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ctcftm2Gal mutation (0 available); any Ctcf mutation (78 available)
Tg(Lck-cre)1Cwi mutation (3 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
• cells at the DN3L to immature single positive stage are smaller than in wild-type mice while double positive cells are larger than in wild-type mice
• alpha beta T cell differentiation is defective
• the number of DN3, DN4 and immature single positive cells is increased compared to in wild-type mice
• mice exhibit only a 4-fold increase in thymocytes during the transition from immature single positive to double positive T cells compared to a 90-fold increase in wild-type mice
• however, sigma delta T cell differentiation and TCR rearrangement are normal
• mice exhibit a defect in the transition from immature single positive cells to double positive cells
• the number of immature single positive T cells undergoing cell cycling is half as many as in wild-type mice
• the number of double negative DN3 and DN4 cells is increased compared to in wild-type mice
• the numbers of mature CD4+ and CD8+ cells in the spleen and lymph nodes are reduced compared to in wild-type mice
• however, the ratio of mature single positive cells to double positive cells is normal
• the numbers of mature CD4+ and CD8+ cells in the spleen and lymph nodes are reduced compared to in wild-type mice
• however, the ratio of mature single positive cells to double positive cells is normal
• the number of mature single positive T cells is decreased compared to in wild-type mice
• the number of immature single positive cells in the thymus is increased compared to in wild-type mice

hematopoietic system
• cells at the DN3L to immature single positive stage are smaller than in wild-type mice while double positive cells are larger than in wild-type mice
• alpha beta T cell differentiation is defective
• the number of DN3, DN4 and immature single positive cells is increased compared to in wild-type mice
• mice exhibit only a 4-fold increase in thymocytes during the transition from immature single positive to double positive T cells compared to a 90-fold increase in wild-type mice
• however, sigma delta T cell differentiation and TCR rearrangement are normal
• mice exhibit a defect in the transition from immature single positive cells to double positive cells
• the number of immature single positive T cells undergoing cell cycling is half as many as in wild-type mice
• the number of double negative DN3 and DN4 cells is increased compared to in wild-type mice
• the numbers of mature CD4+ and CD8+ cells in the spleen and lymph nodes are reduced compared to in wild-type mice
• however, the ratio of mature single positive cells to double positive cells is normal
• the numbers of mature CD4+ and CD8+ cells in the spleen and lymph nodes are reduced compared to in wild-type mice
• however, the ratio of mature single positive cells to double positive cells is normal
• the number of mature single positive T cells is decreased compared to in wild-type mice
• the number of immature single positive cells in the thymus is increased compared to in wild-type mice

endocrine/exocrine glands


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