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Phenotypes Associated with This Genotype
Genotype
MGI:3046468
Allelic
Composition
Pou3f4tm1Tno/Y
Genetic
Background
involves: 129S4/SvJae * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Pou3f4tm1Tno mutation (0 available); any Pou3f4 mutation (4 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hearing/vestibular/ear
• no pathological features in the inner and outer hair cells, stria vascularis, spiral ganglia or auditory nerve are observed
• at 11 weeks, male hemizygotes show pathological changes in the spiral ligament fibrocytes in all turns of the cochlea
• in contrast, middle-ear structures, flexibility of auditory ossicle junctions, and mobility of stapes footplates appear unaffected
• type I fibrocytes filling the area beneath the stria vascularis have few mitochondria while the surrounding extracellular matrix is extremely thin
• type II fibrocytes in the suprastrial zone have markedly fewer cytoplasmic extensions and both the volume of cytoplasm and the number of mitochondria are significantly reduced
• at 11 weeks, male hemizygotes exhibit an average EP value of only 38 mV vs 85 mV observed in wild-type males
• at 11 weeks, male hemizygotes exhibit an average ABR threshold of 89-dB SPL vs 23-dB SPL observed in wild-type males
• male hemizygotes show loss of wave I at 30- to 70-dB SPL and profound deafness

behavior/neurological
N
• male hemizygotes can swim normally, indicating normal vestibular function

skeleton
• type I fibrocytes filling the area beneath the stria vascularis have few mitochondria while the surrounding extracellular matrix is extremely thin
• type II fibrocytes in the suprastrial zone have markedly fewer cytoplasmic extensions and both the volume of cytoplasm and the number of mitochondria are significantly reduced


Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Tumor Biology (MTB), Gene Ontology (GO), MouseCyc
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last database update
06/20/2017
MGI 6.10
The Jackson Laboratory