Phenotypes associated with this allele
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Find Mice |
Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Sun2tm1.1Cyh mutation
(0 available);
any
Sun2 mutation
(42 available)
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normal phenotype
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• at 3-4 months of age, mice exhibit no detectable somatic organ abnormalities or changes in body weight relative to wild-type controls
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Find Mice |
Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Sun1tm1.1Ktj mutation
(0 available);
any
Sun1 mutation
(64 available)
Sun2tm1.1Cyh mutation
(0 available);
any
Sun2 mutation
(42 available)
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mortality/aging
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• mice do not survive birth
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Find Mice |
Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Sun1tm1.1Ktj mutation
(0 available);
any
Sun1 mutation
(64 available)
Sun2tm1.1Cyh mutation
(0 available);
any
Sun2 mutation
(42 available)
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growth/size/body
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• at 3-4 months of age, average body weight is only slightly less than that of wild-type controls
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behavior/neurological
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• at 5-6 months of age, mice exhibit cerebellar ataxia
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• at 3-4 months of age, the time to fall off the rotarod is significantly reduced relative to that in age-matched controls, and mice show a worse motor coordination profile than Sun1tm1.1Ktj homozygotes
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• at 5-6 months of age, footprint analysis showed that hindlimb stride length is significantly reduced relative to that in age-matched controls
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nervous system
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• ~66% of Purkinje cells fail to present at the surface of the internal granule layer (IGL), with lobules IV to VII showing the most severe reductions in Purkinje cell numbe
• however, proliferation and migration of granule neurons are unaffected
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• at P30, cerebellar foliation is severely reduced
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• an EGL layer is not observed at P30
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• at P14, only ~14% of Syne2 is localized at the nuclear membrane of Purkinje cells relative to 44% in wild-type cells
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• at P30, total dendrite length, segments and branching points in Purkinje cells are reduced by ~20-30%
• at P7, only 46.6% of Purkinje cells show significant extension of primary dendrites versus 92.3% in wild-type cells, indicating retarded primary dendrite specification
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• at P30, many Purkinje cells are found in the white matter of the cerebellum
• ~66% of Purkinje cells are absent from the surface of the internal granule layer (IGL), with lobules IV to VII showing the most severe reductions
• for those Purkinje cells that are correctly positioned at the surface of the IGL, >50% of the somas show distorted orientation with their cell soma oriented non-perpendicularly (>120 degrees or <60 degrees) to the border of the Purkinje cell layer and the IGL
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• at P30, the thickness of the molecular layer is significantly reduced
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• at P30, fissuration of the cerebellar cortex is severely reduced
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• at P30, mice show a markedly smaller cerebellar size than wild-type controls
• reduced cerebellar volume is due to aberrant positioning and maturation of Purkinje cells
• no differences in apoptosis or cell proliferation are seen in the developing cerebellum at P7
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• at P7, the distribution of vesicular glutamate transporter 1 (VgluT1 encoded by the Slc17a7 gene) is amorphous in the developing cerebellum, indicating aberrant synaptic patterning
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cellular
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• ~66% of Purkinje cells fail to present at the surface of the internal granule layer (IGL), with lobules IV to VII showing the most severe reductions in Purkinje cell numbe
• however, proliferation and migration of granule neurons are unaffected
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|
Find Mice |
Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Sun1tm1.1Ktj mutation
(0 available);
any
Sun1 mutation
(64 available)
Sun2tm1.1Cyh mutation
(0 available);
any
Sun2 mutation
(42 available)
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nervous system
N |
• at P30, mice show grossly normal cerebellar size relative to wild-type controls
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• at P14, 32% of Syne2 is localized at the nuclear membrane of Purkinje cells relative to 44% in wild-type cells
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growth/size/body
N |
• at 3-4 months of age, average body weight is similar to that of wild-type controls
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behavior/neurological
N |
• adult mice exhibit normal motor coordination, as assessed by rotarod performance and footprint analysis
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