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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
bh
brain hernia
MGI:1856677
Summary 1 genotype
Jump to Allelic Composition Genetic Background Genotype ID
hm1
bh/bh AKR-T MGI:2657259


Genotype
MGI:2657259
hm1
Allelic
Composition
bh/bh
Genetic
Background
AKR-T
Find Mice Using the International Mouse Strain Resource (IMSR)
No mouse lines available in IMSR.
See publication links below for author information.
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• viability is reduced but some survive to breed
• 18 of 40 mutants are alive at weaning (4 weeks)

nervous system
• variable severity; marked hydroencephaly does not occur with cerebral hernia
• cerebral hernia; most severe herniated brains are not usually accompanied by hydrocephaly

vision/eye
• differences found between mutant and wild-type for alpha-,beta-and gamma-crystallins
• some adults with normal sized eyes exhibit opacity of the lens (J:218)
• cataracts of the nucleus and cortex (J:268)
• 75% of mutants display anophthalmia or microphthalmia
• however, orbit size is normal
• 75% of mutants display anophthalmia or microphthalmia

homeostasis/metabolism
• mutants excrete higher amounts of total amino acids than normal early in life, with excessive excretion peaking at 10-15 days, followed by a decline such that when fully grown, they secrete smaller amounts than wild-type
• seen in mutants 3-21 days of age but by adulthood, mutants exhibit a significant decrease in protein content compared to controls

renal/urinary system
• mutants excrete higher amounts of total amino acids than normal early in life, with excessive excretion peaking at 10-15 days, followed by a decline such that when fully grown, they secrete smaller amounts than wild-type
• seen in mutants 3-21 days of age but by adulthood, mutants exhibit a significant decrease in protein content compared to controls
• outer surface of the kidneys is always irregular and nodular
• cysts are confined to the cortex (J:218)
• develops after the first 2 or 3 weeks of postnatal life (J:12172)
• most glomeruli are dilated in adults
• PAS stain-positive plugs in tubules appear before polycystic disease
• some tubules in adults are dilated

craniofacial
• most severe skull defect is a wide median separation of the paired frontal and parietal bones
• in less severely affected mice, the parietals may meet in the dorsal midline but the frontals are separated along at least part of their length
• most mice have foreshortened heads

skeleton
• most severe skull defect is a wide median separation of the paired frontal and parietal bones
• in less severely affected mice, the parietals may meet in the dorsal midline but the frontals are separated along at least part of their length

growth/size/body
• most mice have foreshortened heads
• cysts are confined to the cortex (J:218)
• develops after the first 2 or 3 weeks of postnatal life (J:12172)





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last database update
05/14/2024
MGI 6.23
The Jackson Laboratory