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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Pax2tm1Mbu
targeted mutation 1, Meinrad Busslinger
MGI:1858000
Summary 5 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Pax2tm1Mbu/Pax2tm1Mbu C3.129P2-Pax2tm1Mbu MGI:3694762
ht2
Pax2tm1Mbu/Pax2tm2(Pax5)Mbu C3.129P2-Pax2tm1Mbu Pax2tm2(Pax5)Mbu MGI:3696267
cx3
Pax2tm1Mbu/Pax2tm1Mbu
Pax8tm1(cre)Mbu/Pax8tm1(cre)Mbu
C3.Cg-Pax2tm1Mbu Pax8tm1(cre)Mbu MGI:2651547
cx4
Pax2tm1Mbu/Pax2+
Pax8tm1(cre)Mbu/Pax8+
involves: 129P2/OlaHsd * C3H/He * C57BL/6 MGI:2651548
cx5
Pax2tm1Mbu/Pax2+
Pax8tm1(cre)Mbu/Pax8tm1(cre)Mbu
involves: 129P2/OlaHsd * C3H/He * C57BL/6 MGI:5295945


Genotype
MGI:3694762
hm1
Allelic
Composition
Pax2tm1Mbu/Pax2tm1Mbu
Genetic
Background
C3.129P2-Pax2tm1Mbu
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Pax2tm1Mbu mutation (0 available); any Pax2 mutation (46 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• homozygotes die perinatally due to complete absence of gential tracts and kidneys

renal/urinary system
• at E18.5, homozygotes lack both kidneys
• at E18.5, homozygotes lack both ureters

reproductive system
• at E18.5, male homozygotes lack seminal vesicles
• at E18.5, female homozygotes lack oviducts
• at E18.5, female homozygotes lack a uterus
• at E18.5, female homozygotes lack a vagina
• at E18.5, male homozygotes lack an epididymis
• at E18.5, male homozygotes lack a vas deferens

nervous system
• at E12.5, the isthmic constriction at the midbrain-hindbrain boundary is missing
• at E18.5, the midbrain-hindbrain boundary is missing
• at E18.5, the posterior commissure is shifted caudally
• homozygotes fail to develop a posterior midbrain
• at E18.5, the midbrain tectum is missing
• homozygotes fail to develop a cerebellum

hearing/vestibular/ear
• at E18.5, homozygotes lack a cochlea and contain one enlarged chamber at the ventral side instead of the utricle and saccule
• however, the dorsal vestibular region (including the semicircular canals) is largely normal
• at E18.5, the cochlea is entirely absent
• at E18.5, the saccule and utricle are fused, forming a single enlarged chamber

vision/eye
• at E18.5, homozygotes fail to close the optic fissure
• at E18.5, homozygotes exhibit malformations (scars) in the ventral retina
• at E18.5, cells of the pigmented retina abnormally extend into the optic stalk and nerve

pigmentation
• at E18.5, cells of the pigmented retina abnormally extend into the optic stalk and nerve

endocrine/exocrine glands
• at E18.5, male homozygotes lack seminal vesicles

embryo
• Mullerian ducts initially form in the anterior region of the genital ridge but subsequently degenerate
• Wolffian ducts initially form in the anterior region of the genital ridge but subsequently degenerate




Genotype
MGI:3696267
ht2
Allelic
Composition
Pax2tm1Mbu/Pax2tm2(Pax5)Mbu
Genetic
Background
C3.129P2-Pax2tm1Mbu Pax2tm2(Pax5)Mbu
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Pax2tm1Mbu mutation (0 available); any Pax2 mutation (46 available)
Pax2tm2(Pax5)Mbu mutation (0 available); any Pax2 mutation (46 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
renal/urinary system
• at E18.5, compound heterozygotes display a more severely affected kidney development relative to Pax2tm2(Pax5)Mbu homozygotes
• at E18.5, the kidney usually forms as only a small remnant
• at E18.5, the kidney is often totally absent together with the ureter
• at E18.5, the kidney is often totally absent together with the ureter

vision/eye
N
• unlike Pax2tm1Mbu homozygotes, compound heterozygotes show closure of the optic fissure at E18.5 (fully corrected phenotype)
• at E18.5, compound heterozygotes display malformations (scars) in the ventral region of the pigmented retina, similar to Pax2tm1Mbu homozygotes (partially corrected phenotype)
• at E18.5, compound heterozygotes display cells of the pigmented retina abnormally extending into the optic nerve, though these numbers are drastically reduced relative to Pax2tm1Mbu homozygotes (partially corrected phenotype)

hearing/vestibular/ear
• at E18.5, the cochlear canal is wider and significantly reduced in length, although the organ of Corti develops normally
• at E18.5, the saccule and utricle are fused and enlarged at the expense of the cochlea
• this phenotype is intermediate between the normal morphology of Pax2tm2(Pax5)Mbu homozygotes and the severe phenotype of Pax2tm1Mbu homozygotes

pigmentation
• at E18.5, compound heterozygotes display cells of the pigmented retina abnormally extending into the optic nerve, though these numbers are drastically reduced relative to Pax2tm1Mbu homozygotes (partially corrected phenotype)

reproductive system
N
• at E18.5, compound heterozygotes display normal male and genital tract development, unlike Pax2tm1Mbu homozygotes, which lack the entire genital tracts




Genotype
MGI:2651547
cx3
Allelic
Composition
Pax2tm1Mbu/Pax2tm1Mbu
Pax8tm1(cre)Mbu/Pax8tm1(cre)Mbu
Genetic
Background
C3.Cg-Pax2tm1Mbu Pax8tm1(cre)Mbu
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Pax2tm1Mbu mutation (0 available); any Pax2 mutation (46 available)
Pax8tm1(cre)Mbu mutation (0 available); any Pax8 mutation (32 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
renal/urinary system
• extensive apoptosis in pronephros at 25 somite stage
• double mutant embryos fail to form the pronephros or any later nephric structures




Genotype
MGI:2651548
cx4
Allelic
Composition
Pax2tm1Mbu/Pax2+
Pax8tm1(cre)Mbu/Pax8+
Genetic
Background
involves: 129P2/OlaHsd * C3H/He * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Pax2tm1Mbu mutation (0 available); any Pax2 mutation (46 available)
Pax8tm1(cre)Mbu mutation (0 available); any Pax8 mutation (32 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
renal/urinary system
• at E18.5, glomeruli are reduced in number and abnormally arranged
• at E18.5, the uninduced mesenchyme at the cortex and the mesenchymal stroma are increased, indicating inefficient induction of nephric tubules
• at E18.5, the metanephros is bilaterally reduced to only ~25% of the size in control littermates
• however, all other components of the urogenital system develop normally
• at E18.5, nephric tubules are reduced in number and abnormally arranged
• however, remaining nephrons are functional as mice survive to >18 months of age

reproductive system
• Background Sensitivity: 100% penetrance on C57BL/6 x 129/Sv background; 43% penetrance on C3H background
• minor malformations are still observed in open vaginas
• a significant proportion of males fail to give produce any progeny; likely due to ductal obstruction of the genital tracts rather than a defect in sperm formation




Genotype
MGI:5295945
cx5
Allelic
Composition
Pax2tm1Mbu/Pax2+
Pax8tm1(cre)Mbu/Pax8tm1(cre)Mbu
Genetic
Background
involves: 129P2/OlaHsd * C3H/He * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Pax2tm1Mbu mutation (0 available); any Pax2 mutation (46 available)
Pax8tm1(cre)Mbu mutation (0 available); any Pax8 mutation (32 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
renal/urinary system
• mutant embryos fail to form a metanephros
• however, the adrenal gland, testis, and bladder develop normally

reproductive system





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last database update
07/02/2024
MGI 6.13
The Jackson Laboratory