Phenotypes associated with this allele
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| Find Mice |
Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Bace1tm1Pcw mutation
(1 available);
any
Bace1 mutation
(27 available)
Tg(Camk2a-tTA)1Mmay mutation
(8 available)
Tg(tetO-CDK5R1/GFP)337Lht mutation
(1 available)
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nervous system
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N |
• mice with transgene expression induced by removal of doxycycline from the food 4-6 weeks postnatal exhibit decreased amyloid beta in the hippocampus
• mice exhibit normal synaptic plasticity and long term potentiation (LTP) is fully restored following a 6-week induction
• mice exhibit normal density of synaptophysin puncta in the stratum radiatum of the hippocampus, indicating restoration of synapse density, following a 6-week induction
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• brain weight is reduced in 6-week induced mice
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• reduction in the number of NeuN-positive cells in hippocampal area CA1 in 6-week induced mice
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• reactive astrogliosis is seen in the cortex and hippocampus in 6-week induced mice
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behavior/neurological
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N |
• 6-week induced mice show improved associate learning in contextual fear conditioning and are indistinguishable from controls
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| Find Mice |
Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Tg(Camk2a-tTA)1Mmay mutation
(8 available)
Tg(tetO-CDK5R1/GFP)337Lht mutation
(1 available)
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growth/size/body
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• transgenic mice with transgene expression induced by removal of doxycycline from their food 4-6 weeks postnatal exhibit a slightly decreased body weight compared to control littermates
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nervous system
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• mice with transgene expression induced by removal of doxycycline from the food 4-6 weeks postnatal exhibit amyloid beta deposits in the hippocampus
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• transgenic mice with induction of expression of the transgene for different time periods display progressive decrease in brain weight; with induction for 5 weeks there is a 15-20% decrease in brain weight and with more than 12 weeks of induction, the weight decrease is 30%
(J:104240)
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• in transgenic mice induced for 8 and 12 weeks, there is an increase in aggregations of tau protein (insoluble tau) with an increased amount of phosphorylated tau present; at 15 weeks, there is less soluble tau than in wild-type forebrains and similar results are found at 27 weeks of induction
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• brains of transgenic mice induced for 12 weeks show a significant decrease in thickness and neuronal density in the hippocampus compared to controls
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• 50% reduction in the number of NeuN-positive cells in hippocampal area CA1 in 6-week induced mice
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• brains of transgenic mice induced for 12 weeks show a significant decrease in thickness and neuronal density in the cerebral cortex compared to controls; mice induced for 8 or 12 weeks show a 25 or 40% decrease in cortical neuronal density, respectively, whereas wild-type or non-induced transgenic mice had the same neuronal density
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• induced transgenic mice at 12 weeks postnatal display significant forebrain atrophy with decrease in forebrain mass
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• neurofibrillary tangle-like pathology is exhibited in brains of transgenic mice induced for 27 weeks; there are numerous intraneuronal and flame-shaped neurons positive for neurofibrillary tangle-specific proteins in the cortex and hippocampus of transgenic mice but not wild-type
• other methosds also identify neurofibrillary tangle-like structures in the cerebral cortex, hippocampus and entorhinal cortex of transgenic mice
• brains of transgenic mice induced for 8 or 12 weeks do not express markers for late stage tangles similar to what is observed in wild-type
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• reactive astrogliosis is increased throughout the cortex and hippocampus of mutants evident by an increase in radial and stellate-shaped astrocytes
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• reactive astrogliosis is seen in the cortex and hippocampus in 6-week induced mice
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• mice exhibit reduced density of synaptophysin puncta in the stratum radiatum of the hippocampus, indicating reduced synapse density following a 6-week induction
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• mice exhibit impaired synaptic plasticity following a 6-week induction
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• mice exhibit diminished CA1 long term potentiation (LTP) following a 6-week induction
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behavior/neurological
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• associative learning in contextual fear conditioning is impaired in 6-week induced mice, with mice spending less time freezing after training than wild-type mice
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homeostasis/metabolism
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| Find Mice |
Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Tg(tetO-CDK5R1/GFP)337Lht mutation
(1 available)
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normal phenotype
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• hemizygous mice are viable, fertile, show normal size and display no behavioral abnormalities; homozygosity may be lethal
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