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Phenotypes Associated with This Genotype
Genotype
MGI:2180182
Allelic
Composition
Inhbbtm1Jae/Inhbbtm1Jae
Genetic
Background
either: (129S4/SvJae-Inhbbtm1Jae) or (involves: 129S4/SvJae * BALB/c) or (involves: 129S4/SvJae * C57BL/6)
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Inhbbtm1Jae mutation (3 available); any Inhbb mutation (24 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• in some females initiation of labor fails resulting in the death of the female and fetuses in utero
• Background Sensitivity: at weaning fewer than expected mice survive on a 129S4/SvJae BALB/c background compared to on a 124S4/SvJae C57BL/6 background with both exhibiting decreased survival relative to wild-type mice

reproductive system
• most females deliver on E20.5 and some on E21.5 instead of E19.5 as wild-type females do
• female mice have a reduced ability to produce live offspring regardless of genotype to which they are mated
• female mice give birth to normal sized litters that die within the first day after birth regardless of genotype
• Background Sensitivity: female mice with the 129S4/SvJae BALB/c background are most severely affected

vision/eye
• increased inflammation of the cornea and eyelids is observed on the first day after birth in mice with open eyelids
• ocular dystrophy is observed in mice whose eyelids were delayed in opening
• hyperkeratinization and squamous metaplasia of the corneal epithelium is observed during the first day after birth in mice with open eyelids
• corneal opacification is observed in mice whose eyelids were delayed in opening
• eyelids that were open at birth and subsequently resealed exhibit a delay in reopening
• some mice have open eye lids at birth but seal in subsequent days
• Background Sensitivity: fewer mice on the 129S4/SvJae BALB/c background had open eyelids at birth compared to on the 129S4/SvJae C57BL/6 background and no mice on an inbred 129S4/SvJae background had open eyelids at birth

homeostasis/metabolism
• serum follicle stimulating hormone levels are increased by about 20% relative to in heterozygotes

endocrine/exocrine glands
• maternally dependent fetal death is associated with a failure of milk to be ejected as pups fostered by wild-type mice survive
• milk accumulates in the mammary tissue at day 0.5 after delivery
• at 0.5 days after delivery there is an increase in the glandular to adipose tissue ratio
• at 0.5 days after delivery, vacuolation of the lobules of the mammary gland is observed

immune system
• increased inflammation of the cornea and eyelids is observed on the first day after birth in mice with open eyelids

integument
• maternally dependent fetal death is associated with a failure of milk to be ejected as pups fostered by wild-type mice survive
• milk accumulates in the mammary tissue at day 0.5 after delivery
• at 0.5 days after delivery there is an increase in the glandular to adipose tissue ratio
• at 0.5 days after delivery, vacuolation of the lobules of the mammary gland is observed

behavior/neurological
• maternally dependent fetal death is associated with a failure of milk to be ejected as pups fostered by wild-type mice survive
• milk accumulates in the mammary tissue at day 0.5 after delivery


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