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Phenotypes Associated with This Genotype
Genotype
MGI:4450928
Allelic
Composition
Gata1tm1Mym/Gata1tm1Mym
Tg(Gata1*)#Mym/0
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6 * DBA/2J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gata1tm1Mym mutation (0 available); any Gata1 mutation (45 available)
Tg(Gata1*)#Mym mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hematopoietic system
• in both the erythroid and megakaryocytic lineages
• at E13.5, mice exhibit anemia unlike Gata1tm1Mym/Gata1tm1Mym Tg(Gata1)#Mym control mice
• however, mice recover from anemia by E15.5
• average ploidy is reduced compared to in Gata1tm1Mym/Gata1tm1Mym Tg(Gata1)#Mym control mice
• at P0 and P5, the number of megakaryocytes in the liver is increased compared to in Gata1tm1Mym/Gata1tm1Mym Tg(Gata1)#Mym control mice
• however, between P0 and P5 the number of megakaryocytes is normal in the spleen
• at E12.5 and E15.5, mice exhibit hyperproliferative megakaryocyte progenitors compared with Gata1tm1Mym/Gata1tm1Mym Tg(Gata1)#Mym control mice
• cultured fetal livers from E15.5 and E18.5 mice produce more numerous smaller cells in a CFU-Mk assay compared to samples from fetal livers of control mice
• however, the numbers of CFU-Mk in E18.5 fetal livers is normal
• at P0, abnormal red blood cells are found in blood smear including ones with nucleus and denatured cells unlike in Gata1tm1Mym/Gata1tm1Mym Tg(Gata1)#Mym control mice
• at E13.5, erythroid differentiation as assessed by CD71 expression is severely disrupted compared to in Gata1tm1Mym/Gata1tm1Mym Tg(Gata1)#Mym control mice
• however, erythroid differentiation is normal by E15.5
• megathrombocytes and blast-like cells with prominent Golgi area and poorly developed cytoplasmic granulation are observed unlike in Gata1tm1Mym/Gata1tm1Mym Tg(Gata1)#Mym control mice
• at P0 and P5
• at P0 but not P5

immune system
• at P0 but not P5

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
transient myeloproliferative syndrome DOID:0060888 OMIM:159595
J:158252


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
10/29/2024
MGI 6.24
The Jackson Laboratory