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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Ighm+
wild type
MGI:2431051
Summary 8 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
Ighmtm1Cgn/Ighm+ involves: 129S2/SvPas * C57BL/6 MGI:3767232
ht2
Ighmtm1Msn/Ighm+ involves: 129S/SvEv MGI:3815406
ht3
Ighmtm1Cgn/Ighm+ NOD.129S2-Ighmtm1Cgn MGI:3623426
cn4
Atmintm1.1Jhh/Atmintm1.1Jhh
Ighmtm1(Bcl6)Rdf/Ighm+
Tg(Fcer2a-cre)5Mbu/0
B6.Cg-Atmintm1.1Jhh Ighmtm1(Bcl6)Rdf Tg(Fcer2a-cre)5Mbu MGI:5755471
cx5
Aicdatm1Hon/Aicdatm1Hon
Ighmtm1.1(IGH-2)Cog/Ighm+
involves: 129P2/OlaHsd * C57BL/6 * CBA * FVB/N MGI:4437207
cx6
Ighmtm1Cgn/Ighm+
Tgfb1tm1Doe/Tgfb1tm1Doe
involves: 129S2/SvPas * C57BL/6 * CF-1 MGI:3622466
cx7
Ighmtm1Cgn/Ighm+
Tg(Igh-6/Igh-V125)2Jwt/0
Tg(Igk-C/Igk-V125)1Jwt/0
NOD.Cg-Ighmtm1Cgn Tg(Igh-6/Igh-V125)2Jwt Tg(Igk-C/Igk-V125)1Jwt MGI:3623596
cx8
Ighmtm1Cgn/Ighm+
Tg(Igh-6/Igh-V281)3Jwt/0
NOD.Cg-Ighmtm1Cgn Tg(Igh-6/Igh-V281)3Jwt MGI:3623593


Genotype
MGI:3767232
ht1
Allelic
Composition
Ighmtm1Cgn/Ighm+
Genetic
Background
involves: 129S2/SvPas * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ighmtm1Cgn mutation (18 available); any Ighm mutation (58 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hematopoietic system
• B cell development is arrested at the stage of pre-B cells

immune system
• B cell development is arrested at the stage of pre-B cells




Genotype
MGI:3815406
ht2
Allelic
Composition
Ighmtm1Msn/Ighm+
Genetic
Background
involves: 129S/SvEv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ighmtm1Msn mutation (0 available); any Ighm mutation (58 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
• IgM serum levels are reduced by 50%

hematopoietic system
• IgM serum levels are reduced by 50%




Genotype
MGI:3623426
ht3
Allelic
Composition
Ighmtm1Cgn/Ighm+
Genetic
Background
NOD.129S2-Ighmtm1Cgn
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ighmtm1Cgn mutation (18 available); any Ighm mutation (58 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
• 90% of female and 45% of male heterozygotes develop diabetes (glycosuric values >3) by 20 weeks of age compared to 0% of homozygotes

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
type 1 diabetes mellitus DOID:9744 OMIM:222100
J:37287




Genotype
MGI:5755471
cn4
Allelic
Composition
Atmintm1.1Jhh/Atmintm1.1Jhh
Ighmtm1(Bcl6)Rdf/Ighm+
Tg(Fcer2a-cre)5Mbu/0
Genetic
Background
B6.Cg-Atmintm1.1Jhh Ighmtm1(Bcl6)Rdf Tg(Fcer2a-cre)5Mbu
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Atmintm1.1Jhh mutation (2 available); any Atmin mutation (39 available)
Ighmtm1(Bcl6)Rdf mutation (1 available); any Ighm mutation (58 available)
Tg(Fcer2a-cre)5Mbu mutation (4 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• mice exhibit similar tumorigenesis as Atmintm1.1Jhh/Atmintm1.1Jhh Tg(Fcer2a-cre)5Mbu mice




Genotype
MGI:4437207
cx5
Allelic
Composition
Aicdatm1Hon/Aicdatm1Hon
Ighmtm1.1(IGH-2)Cog/Ighm+
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6 * CBA * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Aicdatm1Hon mutation (7 available); any Aicda mutation (58 available)
Ighmtm1.1(IGH-2)Cog mutation (0 available); any Ighm mutation (58 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
• mIgA1+ cells compete poorly for entry into mucosa-associated lymphoid tissues compared with wild-type cells

hematopoietic system
• mIgA1+ cells compete poorly for entry into mucosa-associated lymphoid tissues compared with wild-type cells




Genotype
MGI:3622466
cx6
Allelic
Composition
Ighmtm1Cgn/Ighm+
Tgfb1tm1Doe/Tgfb1tm1Doe
Genetic
Background
involves: 129S2/SvPas * C57BL/6 * CF-1
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ighmtm1Cgn mutation (18 available); any Ighm mutation (58 available)
Tgfb1tm1Doe mutation (4 available); any Tgfb1 mutation (34 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
• splenocytes of Day 12-19 mutants are hyperresponsive to LPS stimulation in culture compared to Igh-6 heterozygous splenocytes

immune system
• animals display decreased thymic cellularity

hematopoietic system
• animals display decreased thymic cellularity

endocrine/exocrine glands
• animals display decreased thymic cellularity




Genotype
MGI:3623596
cx7
Allelic
Composition
Ighmtm1Cgn/Ighm+
Tg(Igh-6/Igh-V125)2Jwt/0
Tg(Igk-C/Igk-V125)1Jwt/0
Genetic
Background
NOD.Cg-Ighmtm1Cgn Tg(Igh-6/Igh-V125)2Jwt Tg(Igk-C/Igk-V125)1Jwt
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ighmtm1Cgn mutation (18 available); any Ighm mutation (58 available)
Tg(Igh-6/Igh-V125)2Jwt mutation (1 available)
Tg(Igk-C/Igk-V125)1Jwt mutation (1 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
endocrine/exocrine glands
• the percentage of islets infiltrated is slightly increased in Igh-6-heterozygous transgenic mice

immune system
• the percentage of islets infiltrated is slightly increased in Igh-6-heterozygous transgenic mice
• transgenic females heterozygous for Igh-6 develop diabetes (2 consecutive blood glucose measurements >200 mg/dl) at a slightly earlier time (12 weeks) than homozygous transgenic females but the incidence is the same by 17 weeks

homeostasis/metabolism




Genotype
MGI:3623593
cx8
Allelic
Composition
Ighmtm1Cgn/Ighm+
Tg(Igh-6/Igh-V281)3Jwt/0
Genetic
Background
NOD.Cg-Ighmtm1Cgn Tg(Igh-6/Igh-V281)3Jwt
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ighmtm1Cgn mutation (18 available); any Ighm mutation (58 available)
Tg(Igh-6/Igh-V281)3Jwt mutation (1 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
endocrine/exocrine glands
• the percentage of islets infiltrated is slightly greater in transgenic mice heterozygous for Igh-6

immune system
• the percentage of islets infiltrated is slightly greater in transgenic mice heterozygous for Igh-6

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
type 1 diabetes mellitus DOID:9744 OMIM:222100
J:91865





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last database update
03/25/2025
MGI 6.24
The Jackson Laboratory