About   Help   FAQ
Phenotypes Associated with This Genotype
Genotype
MGI:5642030
Allelic
Composition
Npc1tm1.1Dso/Npc1tm1.1Dso
Genetic
Background
B6.129-Npc1tm1.1Dso
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Npc1tm1.1Dso mutation (0 available); any Npc1 mutation (74 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• mice have an average lifespan of 125 days; 59% longer than Npc1m1N homozygotes

growth/size/body
• lower body weight as compared to controls
• progressive weight loss beginning at 10 weeks of age

homeostasis/metabolism
• lipid storage in neocortex and liver
• accumulation of multiple sphingolipid species in liver and brain tissue of older mice, principally monohexosylceramides and lactosylceramides
• lipid accumulation in P14 liver tissue includes: lactosylceramides, monohexosyceramides
• lipid accumulation in P14 liver tissue includes: lactosylceramides, monohexosyceramides, sphingomyelins, sphingoid bases, gangiosides, unesterified cholesterol and 24(S)-hydroxycholesterol
• subcellular storage of cholesterol in lobule X Purkinje neurons in P63 mice
• cholesterol accumulation within cell bodies and axonal segments of neocortical neurons
• cholesterol storage appears in all layers of the necortex, in particular V and VI
• most metabolites localize to neuronal cell bodies
• abnormal accumulation in meganeurites
• cholesterol accumulation in hepatocytes and liver macrophages (CD68+)
• increase in unesterfied cholesterol in liver , but not brain, tissue of older mice
• subcellular storage of ganglioside GM2 in lobule X Purkinje neurons in P63 mice
• GM2 ganglioside accumulation within cell bodies and axonal segments of neocortical neurons
• GM2 and GM3 ganglioside accumulation is less than in Npc1m1N homozygotes
• ganglioside storage appears in all layers of the necortex, in particular V and VI
• most metabolites localize to neuronal cell bodies
• abnormal accumulation in meganeurites

behavior/neurological
• onset of resting tremor beginning at 8 weeks of age
• mice cannot maintain balance on rotating rod by 12 weeks of age

nervous system
• microglial pathology in molecular, Purkinje cell and granular cell layers
• progression and spatial pattern is delayed in comparison to Npc1m1N homozygotes
• age dependent increase in microglial activity
• subcellular storage of cholesterol in lobule X Purkinje neurons in P63 mice
• cholesterol accumulation within cell bodies and axonal segments of neocortical neurons
• cholesterol storage appears in all layers of the necortex, in particular V and VI
• most metabolites localize to neuronal cell bodies
• abnormal accumulation in meganeurites
• polymembranous storage bodies are found in lobule X Purkinje cells from P63 mice
• progressive, age-dependent Purkinje cell degeneration
• degree of loss is less severe at P63 than in Npc1m1N homozygotes
• 58% reduction of Purkinje cells at P63 in anterior cerebella; 91% reduction by P105
• 65% reduction of Purkinje cells at P105 in posterior cerebella
• 88% reduction of Purkinje cells at P105 in central cerebella
• 41% reduction of Purkinje cells at P105 in nodular cerebella
• no observable loss in lobule X at P105
• dystrophic dendritic abnormalities in cerebellar areas with Purkinje cell loss
• age dependent increase in astrocyte reactivity
• progression and spatial pattern is delayed in comparison to Npc1m1N homozygotes
• axonal spheroid formation in cerebellar areas with Purkinje cell loss

cellular
• liver macrophages exhibit a progressive foamy transformation

hematopoietic system
• polymembranous storage bodies found in liver macrophages
• increase in number of liver macrophages
• liver macrophages exhibit a progressive foamy transformation
• microglial pathology in molecular, Purkinje cell and granular cell layers
• progression and spatial pattern is delayed in comparison to Npc1m1N homozygotes
• age dependent increase in microglial activity

immune system
• polymembranous storage bodies found in liver macrophages
• increase in number of liver macrophages
• liver macrophages exhibit a progressive foamy transformation
• microglial pathology in molecular, Purkinje cell and granular cell layers
• progression and spatial pattern is delayed in comparison to Npc1m1N homozygotes
• age dependent increase in microglial activity

liver/biliary system
• cholesterol accumulation in hepatocytes and liver macrophages (CD68+)
• increase in unesterfied cholesterol in liver , but not brain, tissue of older mice
• polymembranous storage bodies found in hepatocytes

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
Niemann-Pick disease DOID:14504 J:221855


Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
Citing These Resources
Funding Information
Warranty Disclaimer, Privacy Notice, Licensing, & Copyright
Send questions and comments to User Support.
last database update
10/29/2024
MGI 6.24
The Jackson Laboratory