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
|
weight loss
(
J:221855
)
• 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
• mice cannot maintain balance on rotating rod by 12 weeks of age
|
nervous system
microgliosis
(
J:221855
)
• 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
|
astrocytosis
(
J:221855
)
• 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
|
microgliosis
(
J:221855
)
• 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
|
microgliosis
(
J:221855
)
• 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 |