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Phenotypes Associated with This Genotype
Genotype
MGI:4880746
Allelic
Composition
Igf2tm1Snha/Igf2+
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * ICR
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Igf2tm1Snha mutation (0 available); any Igf2 mutation (25 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
• osteoblast colony forming units from mice with a paternally inherited mutant allele are smaller and contain cells with fewer contacts and less dense packing
• in culture hematopoietic progenitors from mice with a paternally inherited mutant allele produce fewer large (greater than 10 nuclei) osteoclasts
• however, mutant cells transplanted into wild-type mice are able to form normal numbers of large osteoclasts
• only mice inheriting the mutant allele paternally show abnormal phenotypes

growth/size/body
• growth retardation is detectable as early as E10.5 in mice with a paternally inherited mutant allele
• about a 30% reduction in birth weight in mice with a paternally inherited mutant allele
• mice with a paternally inherited mutant allele remain growth retarded at 12 weeks of age
• growth retardation becomes more pronounced between E13.5 and E17.5 in mice with a paternally inherited mutant allele

skeleton
• thinner and shorter bones in mice with a paternally inherited mutant allele
• the bone is thinner but cortical bone thickness is increased and marrow cavity size is decreased in mice with a paternally inherited mutant allele
• marrow cavity size is decreased in mice with a paternally inherited mutant allele
• at 2, 3 and 12 months of age in mice with a paternally inherited mutant allele
• the lamellar structure of the cortical bone is irregular and poorly formed, with poorly aligned osteocytes and incompletely formed lacunae in mice with a paternally inherited mutant allele
• in mice with a paternally inherited mutant allele
• in adult mice with a paternally inherited mutant allele
• dense and disorganized trabeculae in the femurs of mice with a paternally inherited mutant allele at 3 months of age
• adult mice with a paternally inherited mutant allele have reduced numbers of mesenchymal stem cells and osteoprogenitors
• osteoblast colony forming units from mice with a paternally inherited mutant allele are smaller and contain cells with fewer contacts and less dense packing
• in culture hematopoietic progenitors from mice with a paternally inherited mutant allele produce fewer large (greater than 10 nuclei) osteoclasts
• however, mutant cells transplanted into wild-type mice are able to form normal numbers of large osteoclasts
• the number of chondrocyte colonies formed in E11.5 limb bud mesenchymal cell cultures from mice with a paternally inherited mutant allele is reduced and colonies that do form do so more slowly and have a less mature phenotype
• in mice with a paternally inherited mutant allele

embryo
• growth retardation is detectable as early as E10.5 in mice with a paternally inherited mutant allele

limbs/digits/tail
• the bone is thinner but cortical bone thickness is increased and marrow cavity size is decreased in mice with a paternally inherited mutant allele

hematopoietic system
• in culture hematopoietic progenitors from mice with a paternally inherited mutant allele produce fewer large (greater than 10 nuclei) osteoclasts
• however, mutant cells transplanted into wild-type mice are able to form normal numbers of large osteoclasts

immune system
• in culture hematopoietic progenitors from mice with a paternally inherited mutant allele produce fewer large (greater than 10 nuclei) osteoclasts
• however, mutant cells transplanted into wild-type mice are able to form normal numbers of large osteoclasts


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
04/09/2024
MGI 6.23
The Jackson Laboratory