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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Ightm1(Myc)Janz
targeted mutation 1, Siegfried Janz
MGI:3574400
Summary 4 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
Ightm1(Myc)Janz/Igh+ involves: 129X1/SvJ * C57BL/6 MGI:3575899
cx2
Ightm1(Myc)Janz/Igh+
Mdm4tm1.1Wahl/Mdm4tm1.1Wahl
involves: 129S/Sv * C57BL/6 MGI:3850671
cx3
Ightm1(Myc)Janz/Igh+
Tg(Emu-FGFR3)A5Wmk/0
involves: 129X1/SvJ * C57BL/6 * FVB/N MGI:4819006
cx4
Ightm1(Myc)Janz/Igh+
Tg(Emu-FGFR3)D3Wmk/0
involves: 129X1/SvJ * C57BL/6 * FVB/N MGI:4819007


Genotype
MGI:3575899
ht1
Allelic
Composition
Ightm1(Myc)Janz/Igh+
Genetic
Background
involves: 129X1/SvJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ightm1(Myc)Janz mutation (2 available); any Igh mutation (43 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• tumors are more differentiated than tumors from Ightm1(Myc)Janz Tg(Emu-FGFR3)A5Wmk or Tg(Emu-FGFR3)D3Wmk heterozygotes
• tumor incidence was 68% at 21 months of age (J:96785)
• 75% of mice developed tumors at a median age of 281 days unlike wild-type mice (J:160845)
• most prevalent tumors were lymphoblastic B cell lymphomas with a Burkitt-like 'starry sky' morphology due to tingible body macrophages (J:96785)
• 1/4 of lymphomas were diffuse large B cell lymphomas (J:96785)
• lymphoblastic B-cell lymphomas contain clonal cytogenetic aberrations (J:96785)
• 1/5 of lymphomas were CD19+CD138+ plasmacytomas that exhibited varying degrees of differentiation, including plasmablastic, anaplastic, and plasmacytic variants (J:96785)
• 25% of tumor exhibit plasmacytoid differentiation (J:160845)

immune system
• elevated apoptosis in B cells of 4- to 6-month old tumor-free mutants
• B cells proliferated, on average, 3.8 times faster than controls and showed a 3.5-fold increase in the number of cells in S phase of the cell cycle in 4- to 6-month old, tumor-free mutants
• B splenocytes proliferated more vigorously than controls after stimulation with LPS
• spleen was enlarged in 4- to 6-month old tumor-free mice because of progressive, follicular hyperplasia indicative of B cell accumulation
• lymph nodes were enlarged in 4- to 6-month tumor-free mice because of progressive, follicular hyperplasia indicative of B cell accumulation
• observed in 4- to 6-month old tumor-free mutants

hematopoietic system
• elevated apoptosis in B cells of 4- to 6-month old tumor-free mutants
• B cells proliferated, on average, 3.8 times faster than controls and showed a 3.5-fold increase in the number of cells in S phase of the cell cycle in 4- to 6-month old, tumor-free mutants
• B splenocytes proliferated more vigorously than controls after stimulation with LPS
• spleen was enlarged in 4- to 6-month old tumor-free mice because of progressive, follicular hyperplasia indicative of B cell accumulation

cellular
• elevated apoptosis in B cells of 4- to 6-month old tumor-free mutants
• B cells proliferated, on average, 3.8 times faster than controls and showed a 3.5-fold increase in the number of cells in S phase of the cell cycle in 4- to 6-month old, tumor-free mutants
• B splenocytes proliferated more vigorously than controls after stimulation with LPS

growth/size/body
• spleen was enlarged in 4- to 6-month old tumor-free mice because of progressive, follicular hyperplasia indicative of B cell accumulation

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
Burkitt lymphoma DOID:8584 OMIM:113970
J:96785




Genotype
MGI:3850671
cx2
Allelic
Composition
Ightm1(Myc)Janz/Igh+
Mdm4tm1.1Wahl/Mdm4tm1.1Wahl
Genetic
Background
involves: 129S/Sv * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ightm1(Myc)Janz mutation (2 available); any Igh mutation (43 available)
Mdm4tm1.1Wahl mutation (0 available); any Mdm4 mutation (191 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• mice exhibit increased premature lethality compared with Ightm1Janz heterozygotes

immune system

neoplasm
• lymphomagenesis is accelerated compared to in Ightm1Janz heterozygotes

hematopoietic system

liver/biliary system

cellular

growth/size/body




Genotype
MGI:4819006
cx3
Allelic
Composition
Ightm1(Myc)Janz/Igh+
Tg(Emu-FGFR3)A5Wmk/0
Genetic
Background
involves: 129X1/SvJ * C57BL/6 * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ightm1(Myc)Janz mutation (2 available); any Igh mutation (43 available)
Tg(Emu-FGFR3)A5Wmk mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• tumors are less differentiated than tumors from Ightm1(Myc)Janz heterozygotes
• 98% of mice developed tumors at a median age of 156 days unlike wild-type mice
• 1 tumor exhibits plasmacytoid differentiation

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
multiple myeloma DOID:9538 OMIM:254500
J:160845




Genotype
MGI:4819007
cx4
Allelic
Composition
Ightm1(Myc)Janz/Igh+
Tg(Emu-FGFR3)D3Wmk/0
Genetic
Background
involves: 129X1/SvJ * C57BL/6 * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ightm1(Myc)Janz mutation (2 available); any Igh mutation (43 available)
Tg(Emu-FGFR3)D3Wmk mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• tumors are less differentiated than tumors from Ightm1(Myc)Janz heterozygotes
• 98% of mice developed tumors at a median age of 156 days unlike wild-type mice
• 1 tumor exhibits plasmacytoid differentiation

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
multiple myeloma DOID:9538 OMIM:254500
J:160845





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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
04/23/2024
MGI 6.23
The Jackson Laboratory