Analysis Tools|
Allele Symbol Allele Name Allele ID |
Gt(ROSA)26Sortm1.1(CAG-COX8A/Dendra2)Dcc targeted mutation 1.1, David C Chan MGI:5318241 |
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| Summary |
5 genotypes
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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• mutants die around 6-7 weeks of age due to malnutrition; this is most likely due to difficulty accessing food and water in normal cages due to a rearing defect
• however, when mutants are supplied with hydrated gel packs and crushed pieces of regular chow, all mutants survive beyond 6 months of age, with a majority surviving past 1 year of age
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• mutants are significantly smaller than controls by 5 weeks of age
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• mutants do not gain weight after 4 weeks of age
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• mutants are hunched by 5 weeks of age
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• severe rearing defect as early as 4 weeks of age
• treatment of mutants with L-DOPA alleviates the motor defects
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• mutants are hypoactive by 5 weeks of age
• at 4-5 weeks of age, mutants travel only 68% of the distance traveled by wild-type mice and by 8-11 weeks of age, the distance traveled reduces to 34% of wild-type, indicating an age-dependent decline in locomotive activity
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• beginning at 4-5 weeks, mutants exhibit progressive bradykinesia
• mutants exhibit a decline in the speed of movement with age compared to controls
• mutants spend twice as much time inactive at 6-7 weeks of age as controls and by 8-11 weeks of age, this increases to 6-fold increase in inactive time
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• loss of dopaminergic terminals in the striatum, with a 25% reduction in dopaminergic terminals at 3 weeks of age and 76% reduction by 8-10 weeks
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• mutants exhibit loss of dopaminergic efferents to the striatum, with a 25% reduction in dopaminergic terminals at 3 weeks of age and a 76% reduction by 8-10 weeks of age
• however, projections to the nucleus accumbens and olfactory tubercle are protected and the dopaminergic terminals are moderately preserved at 11-14 weeks
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• dopaminergic neurons remaining have smaller cell bodies and diminished neuronal processes
• dopaminergic neurons exhibit mitochondrial fragmentation and depletion
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• retrograde degeneration of substantia nigra pars compacta dopaminergic neurons and to a lesser extent in the mesolimbic pathway
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• progressive, retrograde degeneration of dopaminergic neurons in the nigrostriatal circuit, with neuronal loss first seen at 10-12 weeks, when a 52% decrease in TH-positive neurons is seen
• some degeneration is also seen in the mesolimbic pathway, although a lesser extent than in the nigrostriatal circuit
• degeneration of dopaminergic neurons occurs in a stepwise manner, with initial defects at the axon terminals, followed 1-2 months later by degeneration of the cell bodies
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• mutants show decreased mitochondrial transport along nerve processes
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• dopaminergic neurons exhibit mitochondrial fragmentation and depletion
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Mouse Models of Human Disease |
DO ID | OMIM ID(s) | Ref(s) | |
| Parkinson's disease | DOID:14330 |
OMIM:PS168600 |
J:188347 | |
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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• mice show no abnormal phenotype up to 1 year of age
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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• no spermatozoa in epididymides
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• impaired acrosome development and failure to produce elongated spermatids
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• with increased mitochondria content
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• 4-fold increase in tubules
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• no spermatozoa in epididymides
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• impaired acrosome development and failure to produce elongated spermatids
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• with increased mitochondria content
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• in round spermatids and giant cells
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• in round spermatids and giant cells with aberrant accumulation of autophagic structures
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• 4-fold increase in tubules
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• in round spermatids and giant cells with aberrant accumulation of autophagic structures
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| ♀ | phenotype observed in females |
| ♂ | phenotype observed in males |
| N | normal phenotype |
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• >5% of caudal epididymidal sperm contain kinks in the neck
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• >15% of caudal epididymidal sperm contain kinks in the midpiece
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• caudal epididymidal sperm show disjointed mitochondrial sheaths with gaps between adjacent organelles
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• >40% of caudal epididymidal sperm contain kinks in the principal piece
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• >60% of caudal epididymidal sperm contain kinks in the midpiece, principal piece or neck
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• most round and elongating spermatids contain tubular mitochondria, unlike in wild-type spermatids where mitochondria are almost always fragmented
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• caudal epididymidal sperm are significantly less motile than wild-type sperm
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• in an in vitro fertilization assay, cauda epididymidal sperm failed to fertilize any oocytes
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• >5% of caudal epididymidal sperm contain kinks in the neck
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• >15% of caudal epididymidal sperm contain kinks in the midpiece
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• caudal epididymidal sperm show disjointed mitochondrial sheaths with gaps between adjacent organelles
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• >40% of caudal epididymidal sperm contain kinks in the principal piece
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• >60% of caudal epididymidal sperm contain kinks in the midpiece, principal piece or neck
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• most round and elongating spermatids contain tubular mitochondria, unlike in wild-type spermatids where mitochondria are almost always fragmented
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• most round and elongating spermatids contain tubular mitochondria, unlike in wild-type spermatids where mitochondria are almost always fragmented
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• total mito-Dendra2 fluorescence is markedly reduced in the midpiece of epididymidal sperm
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• caudal epididymidal sperm are significantly less motile than wild-type sperm
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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 |
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