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Phenotypes Associated with This Genotype
Genotype
MGI:3820222
Allelic
Composition
Igf2rtm1Arge/Igf2r+
Genetic
Background
involves: 129
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Igf2rtm1Arge mutation (0 available); any Igf2r mutation (99 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• when this allele is inherited maternally, most mice die around the time of birth but some survive
• Background Sensitivity: survival rate is dependent on strain background
• when this allele is inherited maternally, most mice die around the time of birth but some survive
• however, when this allele is inherited paternally no abnormal lethality is observed
• when this allele is inherited maternally, some mice die postnatally

reproductive system
• when this allele is inherited maternally, 10 of 16 surviving females exhibit distention of the uterus due to an imperforate vagina
• when this allele is inherited maternally, 10 of 16 surviving females exhibit a 6-fold increase in uterus size compared to in wild-type mice
• when this allele is inherited maternally, 10 of 16 surviving females exhibit distention of the uterus due to an imperforate vagina
• when this allele is inherited maternally, 2 of 3 females are infertile
• when this allele is inherited maternally, 1 of 6 males is infertile

cardiovascular system
• when this allele is inherited maternally, the ventricular septum width is increased compared to in wild-type mice
• when this allele is inherited maternally
• when this allele is inherited maternally, heart weight is 4-fold more than in wild-type mice
• when this allele is inherited maternally
• when this allele is inherited maternally, mice exhibit a 38% increase in mural thickening of the left ventricle compared to in wild-type mice without hyperplasia
• when this allele is inherited maternally, mice exhibit a 4-fold larger wall volume compared to in wild-type mice
• an 89% increase compared to in wild-type mice when this allele is inherited maternally
• when this allele is inherited maternally
• when this allele is inherited maternally, perinatal lethality is likely caused by decompensated heart failure

homeostasis/metabolism
• when this allele is inherited maternally, IGF-II serum levels are 4.4-fold higher than in wild-type mice
• when this allele is inherited maternally, mice are edematous at E17.5 and E18.5 unlike wild-type mice

growth/size/body
• when this allele is inherited maternally
• when this allele is inherited maternally, heart weight is 4-fold more than in wild-type mice
• when this allele is inherited maternally
• beginning at E13.5 when this allele is inherited maternally
• when this allele is inherited maternally, mice are 35% to 40% larger than wild-type mice at birth
• when this allele is inherited maternally, water content at E17.5 and E18.5 is increased compared to in wild-type mice
• when this allele is inherited maternally, mice are 35% to 40% larger than wild-type mice at E18.5
• when this allele is inherited maternally
• when this allele is inherited maternally
• when this allele is inherited maternally
• when this allele is inherited maternally
• when this allele is inherited maternally

limbs/digits/tail
• postaxial when this allele is inherited maternally
• when this allele is inherited maternally

embryo
• beginning at E13.5 when this allele is inherited maternally
• beginning at E13.5 when this allele is inherited maternally

liver/biliary system
• when this allele is inherited maternally
• when this allele is inherited maternally

nervous system
• when this allele is inherited maternally

renal/urinary system
• when this allele is inherited maternally

hematopoietic system
• when this allele is inherited maternally, immature (nucleated) red blood cells persist in the embryonic circulation unlike in wild-type mice

respiratory system
• when this allele is inherited maternally
• when this allele is inherited maternally


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
03/18/2025
MGI 6.24
The Jackson Laboratory