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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Ightm1(PAX5)Mbu
targeted mutation 1, Meinrad Busslinger
MGI:3699130
Summary 3 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Ightm1(PAX5)Mbu/Ightm1(PAX5)Mbu B6.Cg-Ightm1(PAX5)Mbu MGI:3701079
ht2
Ightm1(PAX5)Mbu/Igh+ B6.Cg-Ightm1(PAX5)Mbu MGI:3701080
cx3
Ightm1(PAX5)Mbu/Igh+
Pax5tm1Mbu/Pax5tm1Mbu
involves: 129P2/OlaHsd * 129S2/SvPas * C57BL/6 * CBA MGI:3701078


Genotype
MGI:3701079
hm1
Allelic
Composition
Ightm1(PAX5)Mbu/Ightm1(PAX5)Mbu
Genetic
Background
B6.Cg-Ightm1(PAX5)Mbu
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ightm1(PAX5)Mbu mutation (0 available); any Igh mutation (44 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• ~50% of homozygotes die within 4.4 months with only ~5.9% surviving to 10 months as result of development of lymphomas

cardiovascular system
• extensive tumor infiltrates are found in the heart in moribund mice

digestive/alimentary system
• extensive tumor infiltrates are seen in salivary glands in moribund mice

endocrine/exocrine glands
• extensive tumor infiltrates are seen in salivary glands in moribund mice
• complete disruption of normal architecture by monomorphic population of medium-sized lymphoid cells
• tumor cells are found outside the capsule
• majority of moribund mice have a huge thymus
• cellularity is reduced to ~33% of wild-type level
• most tumor cells are CD4+CD8+ with varying contribution by CD8 single positive cells
• in 20% of moribund mice, lymphoma cells in bone marrow and peripheral lymphoid organs consist of CD8 single positive T cells while lymphoma cells in thymus are primarily double positive T cells

hematopoietic system
• complete disruption of normal architecture by monomorphic population of medium-sized lymphoid cells
• tumor cells are found outside the capsule
• majority of moribund mice have a huge thymus
• cellularity is reduced to ~33% of wild-type level
• under non-competitive conditions, pro-B cell compartment is increased 2-fold relative to wild-type mice
• B cell numbers normalize at later developmental stages
• T-cell development is partially blocked at the earliest pro-T cell stage
• absolute numbers are lower than in heterozygotes and significantly lower than in wild-type
• absolute numbers are lower than in heterozygotes and significantly lower than in wild-type
• complete disruption of normal architecture by monomorphic population of medium-sized lymphoid cells
• all diseased mice show splenomegaly

immune system
• complete disruption of normal architecture by monomorphic population of medium-sized lymphoid cells
• tumor cells are found outside the capsule
• majority of moribund mice have a huge thymus
• cellularity is reduced to ~33% of wild-type level
• under non-competitive conditions, pro-B cell compartment is increased 2-fold relative to wild-type mice
• B cell numbers normalize at later developmental stages
• T-cell development is partially blocked at the earliest pro-T cell stage
• absolute numbers are lower than in heterozygotes and significantly lower than in wild-type
• absolute numbers are lower than in heterozygotes and significantly lower than in wild-type
• complete disruption of normal architecture by monomorphic population of medium-sized lymphoid cells
• all diseased mice show splenomegaly
• complete disruption of normal architecture by monomorphic population of medium-sized lymphoid cells
• tumor cells are found outside the capsule
• all diseased mice show lymphadenopathy

liver/biliary system
• extensive tumor infiltrates are found in the liver in moribund mice

renal/urinary system
• extensive tumor infiltrates are found in kidneys of moribund mice

respiratory system
• extensive tumor infiltrates are found in lungs in moribund mice

neoplasm
• mice develop disseminated lymphoma with complete penetrance by 10 months
• most tumor cells are CD4+CD8+ with varying contribution by CD8 single positive cells
• in 20% of moribund mice, lymphoma cells in bone marrow and peripheral lymphoid organs consist of CD8 single positive T cells while lymphoma cells in thymus are primarily double positive T cells

growth/size/body
• all diseased mice show splenomegaly




Genotype
MGI:3701080
ht2
Allelic
Composition
Ightm1(PAX5)Mbu/Igh+
Genetic
Background
B6.Cg-Ightm1(PAX5)Mbu
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ightm1(PAX5)Mbu mutation (0 available); any Igh mutation (44 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• 16% of heterozygotes die within 1 year, due to lymphomas

immune system
• complete disruption of normal architecture by monomorphic population of medium-sized lymphoid cells
• tumor cells are found outside the capsule
• majority of moribund mice have a huge thymus
• cellularity is reduced to ~60% of wild-type level
• under non-competitive conditions, pro-B cell compartment is increased 2-fold relative to wild-type mice
• B cell numbers normalize at later developmental stages
• T-cell development is partially blocked at the earliest pro-T cell stage
• absolute numbers are significantly lower than in wild-type
• absolute numbers are significantly lower than in wild-type
• complete disruption of normal architecture by monomorphic population of medium-sized lymphoid cells
• all diseased mice show splenomegaly
• complete disruption of normal architecture by monomorphic population of medium-sized lymphoid cells
• tumor cells are found outside the capsule
• all diseased mice show lymphadenopathy

hematopoietic system
• complete disruption of normal architecture by monomorphic population of medium-sized lymphoid cells
• tumor cells are found outside the capsule
• majority of moribund mice have a huge thymus
• cellularity is reduced to ~60% of wild-type level
• under non-competitive conditions, pro-B cell compartment is increased 2-fold relative to wild-type mice
• B cell numbers normalize at later developmental stages
• T-cell development is partially blocked at the earliest pro-T cell stage
• absolute numbers are significantly lower than in wild-type
• absolute numbers are significantly lower than in wild-type
• complete disruption of normal architecture by monomorphic population of medium-sized lymphoid cells
• all diseased mice show splenomegaly

neoplasm
• mice develop lymphoma with a longer latency and at lower incidence than homozygotes
• most tumor cells are CD4+CD8+ with varying contribution by CD8 single positive cells

cardiovascular system
• extensive tumor infiltrates are found in the heart in moribund mice

digestive/alimentary system
• extensive tumor infiltrates are seen in salivary glands in moribund mice

endocrine/exocrine glands
• extensive tumor infiltrates are seen in salivary glands in moribund mice
• complete disruption of normal architecture by monomorphic population of medium-sized lymphoid cells
• tumor cells are found outside the capsule
• majority of moribund mice have a huge thymus
• cellularity is reduced to ~60% of wild-type level
• most tumor cells are CD4+CD8+ with varying contribution by CD8 single positive cells

liver/biliary system
• extensive tumor infiltrates are found in the liver in moribund mice

renal/urinary system
• extensive tumor infiltrates are found in kidneys of moribund mice

respiratory system
• extensive tumor infiltrates are found in lungs in moribund mice

growth/size/body
• all diseased mice show splenomegaly




Genotype
MGI:3701078
cx3
Allelic
Composition
Ightm1(PAX5)Mbu/Igh+
Pax5tm1Mbu/Pax5tm1Mbu
Genetic
Background
involves: 129P2/OlaHsd * 129S2/SvPas * C57BL/6 * CBA
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ightm1(PAX5)Mbu mutation (0 available); any Igh mutation (44 available)
Pax5tm1Mbu mutation (1 available); any Pax5 mutation (35 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hematopoietic system
• mice have partial block in development at pro-B cell to pre-B cells transition in bone marrow
• splenic B cell numbers were decreased by 6-fold compared to wild-type

immune system
N
• early B cell block seen in Pax5-deficient mice is rescued, as shown by presence of IgM+IgD+ mature B cells
• mice have partial block in development at pro-B cell to pre-B cells transition in bone marrow
• splenic B cell numbers were decreased by 6-fold compared to wild-type





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last database update
06/12/2024
MGI 6.13
The Jackson Laboratory