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Phenotypes Associated with This Genotype
Genotype
MGI:2175074
Allelic
Composition
Irf8tm1Hor/Irf8tm1Hor
Genetic
Background
either: (involves: 129P2/OlaHsd) or (involves: 129P2/OlaHsd * C57BL/6)
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Irf8tm1Hor mutation (1 available); any Irf8 mutation (35 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• 80% of mice infected with vacinia virus or lymphocytic choriomeningitis virus die within 10 to 20 days unlike wild-type mice that control the infection
• 33% of mice are moribund by 50 weeks of age with features indicating a transition to blast crisis

growth/size/body
• mice develop hepatosplenomegaly with spleen weights of 500 to 2000 mg
• spleen weights of 500 to 2000 mg

immune system
• mice develop hepatosplenomegaly with spleen weights of 500 to 2000 mg
• spleen weights of 500 to 2000 mg
• in the bone marrow
• the relative frequency of B cells is decreased in the spleen
• the relative frequency of T cells is decreased in the spleen
• 38.9+/-9.5 leukocytes per ul x103 compared to 6.76+/-0.55 leukocytes per ul x103 in wild-type mice
• the frequency of granulocytes in the spleen, lymph node, peripheral blood and bone marrow is increased relative to in wild-type mice
• the frequency of granulocytes in the spleen and lymph nodes increases with age
• mice exhibit lymphocyte and plasma cells hyperplasia in Peyer's patches and the lamina propria
• the frequency of B cells is increased in the lymph nodes
• the relative frequency of B cells is decreased in the spleen
• the frequency of macrophage in the spleen, lymph node and bone marrow is increased relative to in wild-type mice
• the frequency of plasma cells I reduced in the bone marrow while mice exhibit plasma cells hyperplasia in Peyer's patches and the lamina propria
• following infection with lymphocytic choriomeningitis virus strain WE, mice exhibit 40% mortality, a reduction in primary and absence of secondary cytotoxic lymphocyte response, and persistence of the virus in the liver, spleen and kidney
• lymph nodes are enlarged 5-fold and are populated by neutrophilic granulocytes
• interferon-gamma production following stimulation with ConA is reduced 3-fold while production following stimulation with LPS is decreased more than 100-fold compared to in wild-type mice
• 80% of mice infected with vacinia virus or lymphocytic choriomeningitis virus die within 10 to 20 days unlike wild-type mice that control the infection
• cytotoxic T lymphocyte response is reduced 3- to 10-fold following infection with vesicular stomatitis virus and vacinia virus
• following infection with lymphocytic choriomeningitis virus strain WE, mice exhibit 40% mortality, a reduction in primary and absence of secondary cytotoxic lymphocyte response, and persistence of the virus in the liver, spleen and kidney

neoplasm
• all mice develop hematologic neoplasia resembling chronic myelogenous leukemia
• 33% of mice are moribund by 50 weeks of age with features indicating a transition to blast crisis

hematopoietic system
• mice develop hepatosplenomegaly with spleen weights of 500 to 2000 mg
• spleen weights of 500 to 2000 mg
• erythropoiesis is increased compared to in wild-type mice
• bone marrows exhibit hypercellularity due to an increase in mature granulocytes and their precursors compared to in wild-type mice
• mice exhibit increased proliferation of abnormal megakaryocytes
• in the bone marrow
• the relative frequency of B cells is decreased in the spleen
• the relative frequency of T cells is decreased in the spleen
• 38.9+/-9.5 leukocytes per ul x103 compared to 6.76+/-0.55 leukocytes per ul x103 in wild-type mice
• the frequency of granulocytes in the spleen, lymph node, peripheral blood and bone marrow is increased relative to in wild-type mice
• the frequency of granulocytes in the spleen and lymph nodes increases with age
• mice exhibit lymphocyte and plasma cells hyperplasia in Peyer's patches and the lamina propria
• the frequency of B cells is increased in the lymph nodes
• the relative frequency of B cells is decreased in the spleen
• the frequency of macrophage in the spleen, lymph node and bone marrow is increased relative to in wild-type mice
• the frequency of plasma cells I reduced in the bone marrow while mice exhibit plasma cells hyperplasia in Peyer's patches and the lamina propria
• following infection with lymphocytic choriomeningitis virus strain WE, mice exhibit 40% mortality, a reduction in primary and absence of secondary cytotoxic lymphocyte response, and persistence of the virus in the liver, spleen and kidney

liver/biliary system
• mice develop hepatosplenomegaly with spleen weights of 500 to 2000 mg

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
familial chronic myelocytic leukemia-like syndrome DOID:0060761 OMIM:600080
J:36038


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
11/12/2024
MGI 6.24
The Jackson Laboratory