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Phenotypes Associated with This Genotype
Genotype
MGI:5752054
Allelic
Composition
Tg(Prnp-rtTA2S*M2)#Rkhu/0
Tg(tetO-FMR1*,-EGFP)#Rkhu/0
Genetic
Background
involves: C57BL/6JRj
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
behavior/neurological
• 20 weeks of dox treatment results in a lower gain of optokinetic reflex, indicating deficits in compensatory eye movements
• discontinuing dox induction after 8 weeks of exposure results in better optokinetic reflex performance at 20 weeks
• mice exhibit a lower gain in visually enhanced vestibulo-ocular reflex (VVOR) after 20 weeks of dox treatment
• discontinuing dox induction after 8 weeks of exposure prevents further deterioration of VVOR

hearing/vestibular/ear
• mice exhibit a lower gain in visually enhanced vestibulo-ocular reflex (VVOR) after 20 weeks of dox treatment
• discontinuing dox induction after 8 weeks of exposure prevents further deterioration of VVOR

nervous system
• mice exhibit ubiquitin-positive intranuclear inclusions in the brain (lobule X of the cerebellum, hippocampus and striatum) after 8 weeks of doxycycline (dox) treatment
• intranuclear inclusions are round/spherical in shape in the hippocampus and cat-eye shaped in the granular layer of lobule X of the cerebellum
• the number of inclusions and size of inclusions increase with longer dox treatment times
• ubiquitin-positive intranuclear inclusions contain polyglycine peptides, the 20S core complex of the proteasome, Hsp40, and Rad23B
• 12 weeks of dox washout after both 12 and 16 weeks of dox treatment does not reduce the number or size of ubiquitin-positive inclusions in cerebellar lobule X, however further increase in number and size is not seen, indicating prevention of further progression
• 12 weeks of dox washout after 8 weeks of dox treatment results in a reduction in the number and size of ubiquitin-positive inclusions

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
fragile X-associated tremor/ataxia syndrome DOID:0050879 OMIM:300623
J:224760


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Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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last database update
11/12/2024
MGI 6.24
The Jackson Laboratory