vision/eye
• aged mutants exhibit an increase in subretinal/Bruch's membrane region autofluorescence
(J:125991)
• increase in C3 deposition in the retina of aged mutants
(J:125991)
• 12 month old mutants exhibit large clusters of hyperfluorescent foci in the subretinal space and show an abundance of partially digested fluorescent deposits adjacent to the retinal pigment epithelium
(J:203471)
• 12 month old mutants show C3 deposition in the retina and extensive deposition of amyloid beta on the basal side of retinal pigment epithelium
(J:203471)
• 3 month old mutants treated in both prophylactic and therapeutic regimes with an anti-amyloid beta monoclonal antibody 6F6 show a reduction in accumulation of both amyloid beta and activated C3 deposition in the retina
(J:203471)
|
• rod bipolar cells of aged mutants show more prominent and numerous fine dendrites sprouting into the outer nuclear layer than controls
|
• the interface between the retinal pigmented epithelium cell and the outer segment is abnormal with loss of the intimate relationship between the perpendicular outer segment tips and apical microvilli of the retinal pigmented epithelium
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• short-wavelength cone opsin is redistributed from the outer segments to more proximal cell compartments in aged mutants
|
• aged mutants show discrete regions of misaligned, disorganized photoreceptor outer segments
• many outer segments are bent and some lie horizontally along the apical aspect of the retinal pigmented epithelium
|
• the distribution of organelles within the retinal pigment epithelial layer is different, with the organelles dispersed throughout the retinal pigment epithelial instead of concentrated toward the apical aspect of the cell as in controls
• older mutants exhibit a decrease in the amount of sub- retinal pigment epithelial electron-dense material
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• 29% decrease in Bruch's membrane thickness in aged mutants
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• rod photoreceptor function is impaired in aged mutants as indicated by a reduction in amplitude and change in slope of the a-wave of the ERG
• however, minimal impairment of cone function is seen
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• electroretinography shows a reduction b-wave amplitudes with increasing stimulus intensity in aged mutants
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• 2 year old mutants exhibit a greater reduction in visual acuity than controls
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nervous system
• the basal side of retinal pigment epithelium shows extensive deposition of amyloid beta in 10 week and 12 month old mutants
• increase in the rate of amyloid beta deposition at 3, 6, and 12 months of age compared to controls
• 3 month old mutants treated in both prophylactic and therapeutic regimes with an anti-amyloid beta monoclonal antibody 6F6 show a reduction in accumulation of both amyloid beta and activated C3 deposition in the retina
|
• rod bipolar cells of aged mutants show more prominent and numerous fine dendrites sprouting into the outer nuclear layer than controls
|
• short-wavelength cone opsin is redistributed from the outer segments to more proximal cell compartments in aged mutants
|
• aged mutants show discrete regions of misaligned, disorganized photoreceptor outer segments
• many outer segments are bent and some lie horizontally along the apical aspect of the retinal pigmented epithelium
|
pigmentation
• the distribution of organelles within the retinal pigment epithelial layer is different, with the organelles dispersed throughout the retinal pigment epithelial instead of concentrated toward the apical aspect of the cell as in controls
• older mutants exhibit a decrease in the amount of sub- retinal pigment epithelial electron-dense material
|
homeostasis/metabolism
• the basal side of retinal pigment epithelium shows extensive deposition of amyloid beta in 10 week and 12 month old mutants
• increase in the rate of amyloid beta deposition at 3, 6, and 12 months of age compared to controls
• 3 month old mutants treated in both prophylactic and therapeutic regimes with an anti-amyloid beta monoclonal antibody 6F6 show a reduction in accumulation of both amyloid beta and activated C3 deposition in the retina
|
Mouse Models of Human Disease |
DO ID | OMIM ID(s) | Ref(s) | |
age related macular degeneration 4 | DOID:0110017 |
OMIM:610698 |
J:203471 |