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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Ikzf1tm2Kge
targeted mutation 2, Katia Georgopoulos
MGI:2158690
Summary 4 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Ikzf1tm2Kge/Ikzf1tm2Kge involves: 129S4/SvJae MGI:4360680
ht2
Ikzf1tm1.1Smale/Ikzf1tm2Kge involves: 129S4/SvJae * C57BL/6 MGI:5563081
ht3
Ikzf1tm2Kge/Ikzf1tm2.1Smale involves: 129S4/SvJae * C57BL/6 MGI:5563082
ht4
Ikzf1plstc/Ikzf1tm2Kge involves: 129S4/SvJae * C57BL/6 * C57BL/6JSfdAnu MGI:4442838


Genotype
MGI:4360680
hm1
Allelic
Composition
Ikzf1tm2Kge/Ikzf1tm2Kge
Genetic
Background
involves: 129S4/SvJae
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ikzf1tm2Kge mutation (0 available); any Ikzf1 mutation (30 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
• thymus and T cell proliferation in response to TCR stimulation is enhanced in these mice
• thymus development is delayed in these mice
• thymus morphology at birth is similar to day 13-14 fetal thymus in controls
• the thymus only begins to develop cortical and medullary structures in the first week of life
• between 2-6 of weeks of age, thymus size dramatically increases so that in some cases the thymus is similar in size to controls
• thymic dendritic antigen-presenting-cells are virtually absent
• thymocyte number is low at birth but increases with age
• thymocyte numbers are 100- to 300- fold lower than controls between 3 and 6 days of age
• numbers increase between 2 and 6 weeks after birth so that thymocyte numbers range from 5- fold lower to normal
• pro-B cells are absent in the bone marrow
• fetal T cell development is severely impaired leading to a defect in gamma-delta intraepithelial lymphocyte development (J:37317)
• mice exhibit skewing towards the CD4+ lineage (J:208211)
• double-positive thymocyte numbers are decreased in these mice
• granulocyte numbers in the bone marrow are decreased compared to control
• thymic dendritic antigen-presenting-cells are virtually absent
• B-1a B cells are absent in the peritoneum
• B cells are absent in the periphery (J:37317)
• pre-B cells are absent in the bone marrow
• NK cells are absent in the spleen (J:37317)
• no significant gamma-delta T cell population is found in the spleen
• mice lack dendritic epidermal T cells in the skin
• intraepithelial gamma-delta T cell numbers in the intestine are severely reduced
• vagina mucosal gamma-delta T cell numbers are normal
• ratio of CD4+ to CD8+ T cells varies from being similar to wild-type to being increased by 2- to 3- fold
• splenocyte numbers are low at birth but increase with age
• Peyer's patches lymphoid follicles are absent in these mice

hematopoietic system
• thymus and T cell proliferation in response to TCR stimulation is enhanced in these mice
• thymus development is delayed in these mice
• thymus morphology at birth is similar to day 13-14 fetal thymus in controls
• the thymus only begins to develop cortical and medullary structures in the first week of life
• between 2-6 of weeks of age, thymus size dramatically increases so that in some cases the thymus is similar in size to controls
• thymic dendritic antigen-presenting-cells are virtually absent
• thymocyte number is low at birth but increases with age
• thymocyte numbers are 100- to 300- fold lower than controls between 3 and 6 days of age
• numbers increase between 2 and 6 weeks after birth so that thymocyte numbers range from 5- fold lower to normal
• the abnormal erythropoiesis associated with mice homozygote for the dominant-negative Ikzf1tm1Kge allele are not observed in these mice
• pro-B cells are absent in the bone marrow
• fetal T cell development is severely impaired leading to a defect in gamma-delta intraepithelial lymphocyte development (J:37317)
• mice exhibit skewing towards the CD4+ lineage (J:208211)
• double-positive thymocyte numbers are decreased in these mice
• granulocyte numbers in the bone marrow are decreased compared to control
• thymic dendritic antigen-presenting-cells are virtually absent
• B-1a B cells are absent in the peritoneum
• B cells are absent in the periphery (J:37317)
• pre-B cells are absent in the bone marrow
• NK cells are absent in the spleen (J:37317)
• no significant gamma-delta T cell population is found in the spleen
• mice lack dendritic epidermal T cells in the skin
• intraepithelial gamma-delta T cell numbers in the intestine are severely reduced
• vagina mucosal gamma-delta T cell numbers are normal
• ratio of CD4+ to CD8+ T cells varies from being similar to wild-type to being increased by 2- to 3- fold
• splenocyte numbers are low at birth but increase with age

endocrine/exocrine glands
• thymus development is delayed in these mice
• thymus morphology at birth is similar to day 13-14 fetal thymus in controls
• the thymus only begins to develop cortical and medullary structures in the first week of life
• between 2-6 of weeks of age, thymus size dramatically increases so that in some cases the thymus is similar in size to controls
• thymic dendritic antigen-presenting-cells are virtually absent
• thymocyte number is low at birth but increases with age
• thymocyte numbers are 100- to 300- fold lower than controls between 3 and 6 days of age
• numbers increase between 2 and 6 weeks after birth so that thymocyte numbers range from 5- fold lower to normal

cellular
• thymus and T cell proliferation in response to TCR stimulation is enhanced in these mice




Genotype
MGI:5563081
ht2
Allelic
Composition
Ikzf1tm1.1Smale/Ikzf1tm2Kge
Genetic
Background
involves: 129S4/SvJae * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ikzf1tm1.1Smale mutation (0 available); any Ikzf1 mutation (30 available)
Ikzf1tm2Kge mutation (0 available); any Ikzf1 mutation (30 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• no mice are produced presumably because of embryonic lethality of Ikzf1tm2Kge on a C57BL/6 background




Genotype
MGI:5563082
ht3
Allelic
Composition
Ikzf1tm2Kge/Ikzf1tm2.1Smale
Genetic
Background
involves: 129S4/SvJae * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ikzf1tm2.1Smale mutation (0 available); any Ikzf1 mutation (30 available)
Ikzf1tm2Kge mutation (0 available); any Ikzf1 mutation (30 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• no mice are produced presumably because of embryonic lethality of Ikzf1tm2Kge on a C57BL/6 background




Genotype
MGI:4442838
ht4
Allelic
Composition
Ikzf1plstc/Ikzf1tm2Kge
Genetic
Background
involves: 129S4/SvJae * C57BL/6 * C57BL/6JSfdAnu
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ikzf1plstc mutation (4 available); any Ikzf1 mutation (30 available)
Ikzf1tm2Kge mutation (0 available); any Ikzf1 mutation (30 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hematopoietic system
• at E15.5, compound heterozygotes display an erythropoietic failure in fetal liver and blood similar to that observed in Ikzf1plstc homozygotes
• compound heterozygotes are severely anemic, similar to Ikzf1plstc homozygotes





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last database update
04/23/2024
MGI 6.23
The Jackson Laboratory