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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Runx1tm1Spe
targeted mutation 1, Nancy A Speck
MGI:1857568
Summary 6 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Runx1tm1Spe/Runx1tm1Spe either: (involves: 129S4/SvJae * BALB/c) or (involves: 129S4/SvJae * C57BL/6) MGI:2167339
ht2
Runx1tm1Spe/Runx1+ either: (involves: 129S4/SvJae * BALB/c * C57BL/6 * CBA/Ca) or (involves: 129S4/SvJae * C57BL/6 * CBA/Ca) MGI:2655966
ht3
Runx1tm1Spe/Runx1+ either: (involves: 129S4/SvJae * BALB/c) or (involves: 129S4/SvJae * C57BL/6) MGI:3709771
ht4
Runx1tm1Spe/Runx1tm2Spe either: (involves: 129S4/SvJae * BALB/c) or (involves: 129S4/SvJae * C57BL/6) MGI:2671954
ht5
Runx1tm1Spe/Runx1tm3Itan involves: 129P2/OlaHsd * 129S4/SvJae * C57BL/6 MGI:4458935
ht6
Runx1tm1Spe/Runx1tm1Yg involves: 129S1/Sv * 129S4/SvJae * 129X1/SvJ * C57BL/6 MGI:4459011


Genotype
MGI:2167339
hm1
Allelic
Composition
Runx1tm1Spe/Runx1tm1Spe
Genetic
Background
either: (involves: 129S4/SvJae * BALB/c) or (involves: 129S4/SvJae * C57BL/6)
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Runx1tm1Spe mutation (1 available); any Runx1 mutation (35 available)
phenotype observed in females
phenotype observed in males
N normal phenotype

Gross and microscopic views of pathologic lesions in Runx1tm1Spe/Runx1tm1Spe mice

mortality/aging

cardiovascular system
• extensive hemorrhages, with 14% of homozygotes showing hemorrhaging at E10.5, 73% at E11.5 and 100% at E12.5
• most extensive hemorrhages involve the central nervous system and are located in the isthmus, ventral metencephalon, and spinal cord
• focal petechial hemorrhages are seen in peripheral nerves and intersegmental regions, especially prominent at the nerve roots of VII-VIII cranial nerve complex and at some spinal nerves
• mesodermal petechial hemorrhages are seen in a small number of embryos
• pericardiac and peritoneal hemorrhages are seen in some embryos

hematopoietic system
• only primitive nucleated erythroid cells are seen in liver sections or smears at E11 and E12.5, respectively, indicating a block in definitive erythropoiesis
• no erythroid colonies differentiate from yolk sac cells as in wild-type
• no myeloid colonies differentiate from yolk sac cells as in wild-type
• fetal liver hematopoiesis is impaired, however primitive erythrocytes are normal
• only primitive nucleated erythroid cells are seen in liver sections or smears at E11 and E12.5, respectively, indicating a block in definitive erythropoiesis

immune system
• no myeloid colonies differentiate from yolk sac cells as in wild-type

homeostasis/metabolism
• pericardiac and peritoneal hemorrhages are seen in some embryos

embryo
• foci of cellular necrosis, often bilateral and symmetrical, are seen at the nerve/CNS interfaces of cranial and spinal nerves at E10.5
• somitic/intersomitic necrosis is seen in the lower thoracic and lumbar regions

cellular
• foci of cellular necrosis, often bilateral and symmetrical, are seen at the nerve/CNS interfaces of cranial and spinal nerves at E10.5
• somitic/intersomitic necrosis is seen in the lower thoracic and lumbar regions




Genotype
MGI:2655966
ht2
Allelic
Composition
Runx1tm1Spe/Runx1+
Genetic
Background
either: (involves: 129S4/SvJae * BALB/c * C57BL/6 * CBA/Ca) or (involves: 129S4/SvJae * C57BL/6 * CBA/Ca)
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Runx1tm1Spe mutation (1 available); any Runx1 mutation (35 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
• survival of mutants shows slight but significant increase compared to transgenic mice on a wild-type Runx1 background

endocrine/exocrine glands
• survival of mutants shows slight but significant increase compared to transgenic mice on a wild-type Runx1 background




Genotype
MGI:3709771
ht3
Allelic
Composition
Runx1tm1Spe/Runx1+
Genetic
Background
either: (involves: 129S4/SvJae * BALB/c) or (involves: 129S4/SvJae * C57BL/6)
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Runx1tm1Spe mutation (1 available); any Runx1 mutation (35 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
neoplasm
N
• mice infected with Moloney murine leukemia virus within 24 hours of birth do not show any increase in tumor incidence or latency compared to infected littermate controls

embryo
• at E11.5, animals have a >3-fold decrease in CFU-C in AGM (aorta/gonad/mesonephros) regions than wild-type embryos in the AGM region

hematopoietic system
• at E11.5, animals have a >3-fold decrease in CFU-C in AGM (aorta/gonad/mesonephros) regions than wild-type embryos in the AGM region
• a significant decrease in percentage of CD4+ splenic T cells and in the CD4+:CD8+ ratio is observed compared to wild-type adults, but percentage of CD8+ T cells is not changed

immune system
• a significant decrease in percentage of CD4+ splenic T cells and in the CD4+:CD8+ ratio is observed compared to wild-type adults, but percentage of CD8+ T cells is not changed




Genotype
MGI:2671954
ht4
Allelic
Composition
Runx1tm1Spe/Runx1tm2Spe
Genetic
Background
either: (involves: 129S4/SvJae * BALB/c) or (involves: 129S4/SvJae * C57BL/6)
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Runx1tm1Spe mutation (1 available); any Runx1 mutation (35 available)
Runx1tm2Spe mutation (0 available); any Runx1 mutation (35 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hematopoietic system
• absence of hematopoietic colonies in fetal livers, vitelline and umbilical arteries
• no fetal liver hematopoiesis
• no yolk sac hematopoiesis

embryo
• absence of hematopoietic colonies in fetal livers, vitelline and umbilical arteries
• no fetal liver hematopoiesis
• no yolk sac hematopoiesis




Genotype
MGI:4458935
ht5
Allelic
Composition
Runx1tm1Spe/Runx1tm3Itan
Genetic
Background
involves: 129P2/OlaHsd * 129S4/SvJae * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Runx1tm1Spe mutation (1 available); any Runx1 mutation (35 available)
Runx1tm3Itan mutation (0 available); any Runx1 mutation (35 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
N
• unlike Runx1tm1Spe homozygotes, mice do not exhibit embryonic lethality

hematopoietic system
N
• unlike Runx1tm1Spe homozygotes, mice do not exhibit fetal liver anemia




Genotype
MGI:4459011
ht6
Allelic
Composition
Runx1tm1Spe/Runx1tm1Yg
Genetic
Background
involves: 129S1/Sv * 129S4/SvJae * 129X1/SvJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Runx1tm1Spe mutation (1 available); any Runx1 mutation (35 available)
Runx1tm1Yg mutation (2 available); any Runx1 mutation (35 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging

hematopoietic system
• severe in the fetal liver at E12.5

cardiovascular system
• in the central nervous system at E12.5





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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
04/16/2024
MGI 6.23
The Jackson Laboratory