Phenotypes associated with this allele
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Find Mice |
Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Atp8a2wl mutation
(2 available);
any
Atp8a2 mutation
(74 available)
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nervous system
vision/eye
N |
• outer segment photoreceptors exhibit normal morphology
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hearing/vestibular/ear
N |
• outer and inner hair cells appear normal
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behavior/neurological
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Find Mice |
Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Atp8a2wl mutation
(2 available);
any
Atp8a2 mutation
(74 available)
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nervous system
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• at 28 days of age there is primary axonal degeneration of the optic nerve, but significant dysmyelination or hypomyelination are not found in the optic nerves at this timepoint
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vision/eye
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• at 28 days of age there is primary axonal degeneration of the optic nerve, but significant dysmyelination or hypomyelination are not found in the optic nerves at this timepoint
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growth/size/body
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• at 28 days of age the average weight of males, 6.3g, is less than half that of normal controls, 14.2g
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Find Mice |
Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Atp8a2wl mutation
(2 available);
any
Atp8a2 mutation
(74 available)
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mortality/aging
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• most homozygotes die by wean age, with males dying at approximately 3 weeks of age and females dying approximately a week later
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nervous system
N |
• demyelination is not found in the telencephalon at 2.5 weeks of age
(J:13068)
• there is no myelin degeneration detected in the thalamus
(J:15162)
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• at one week of age a small amount of myelin degeneration can be found in the ventral funiculus of the spinal cord; at two weeks of age myelin degeneration is marked in the vestibulo-spinal tracts and beginning in the spino-cerebellar tracts; and by 2.5 weeks of age very severe demyelination is found throughout the archi- and paleocerebellar systems, with heavy degeneration permeating the vestibulo-spinal tract, dorsal spinocerebellar tract, brachium conjunctivum, magnocellular red nucleus, rubrospinal tract, vestibular nerve and nuclei, juxtarestiform body, trapezoid body and the superior olivary nucleus, and moderate degeneration in the medial lemnicus, medial longitudinal fasiculus and tecto-spinal tracts
(J:13068)
• in the vestibulosponal tract from the lateral vestibular nucleus to the spinal cord, and in the entering fibers of the eighth cranial nerve, the juxtaresiform body, the medullary center of the cerebellum, the medial longitudinal fasciculus, the trapezoid body, the lateral lemniscus, brachium conjunctivum, red nucleus, and the rubrospinal and tectospinal tracts
(J:15162)
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behavior/neurological
N |
• can orient in water and swim
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• no reaction to pinching of the tail
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• when homozyogtes are lifted by the tail, the hind feet lock together in a spasm
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• swaying of the body, dragging of the hind limbs and progressive incoordination of the limbs when walking
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• homozygotes have difficulty in walking and when trying to walk seem to pull the hind feet along rather than pushing off with them
(J:13068)
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hearing/vestibular/ear
N |
• normal hearing and auditory reflexes
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homeostasis/metabolism
Allelic Composition |
Atp8a2wl/Atp8a2+
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Genetic Background |
Not Specified |
|
Find Mice |
Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Atp8a2wl mutation
(2 available);
any
Atp8a2 mutation
(74 available)
|
|
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behavior/neurological
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• symptoms are subtle and obvious only to experienced observers
• all heterozygotes are not symptomatic
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• Background Sensitivity: heterozygous mice are distinguishable from normal mice only in exceptional cases
(J:270)
• mild ataxia is characterized by the hind feet going out to the side more than normal and the body being closer to the ground
(J:13068)
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nervous system
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• at 2 weeks of age a small amount of myelin degeneration is found in the vestibulo-spinal tract and at 2.5 weeks myelin degeneration is still confined to the vestibulo-spinal pathway with the cerebellar systems unaffected
(J:13068)
• moderate demyelination restricted to the vestibulospinal tract
(J:15162)
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