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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Prph2em1Sal
endonuclease-mediated mutation 1, Universidad de Salamanca
MGI:7593949
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Prph2em1Sal/Prph2em1Sal C57BL/6J-Prph2em1Sal MGI:7593964
ht2
Prph2em1Sal/Prph2+ C57BL/6J-Prph2em1Sal MGI:7593962


Genotype
MGI:7593964
hm1
Allelic
Composition
Prph2em1Sal/Prph2em1Sal
Genetic
Background
C57BL/6J-Prph2em1Sal
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Prph2em1Sal mutation (0 available); any Prph2 mutation (28 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
vision/eye
• 12-month-old retinas show an increase in CD45high, CD11b, and CD169 immunopositive populations, indicating microglial inflammation and/or recruitment of monocytes and macrophages
• an increase in activated immune-related cells (CD11b+CD11chighMHC class II+) is seen at 3, 6, 9, and 12 months
• the CD169+ population is increased at 12 months of age, indicating an increase in pathogenic phagocytes in the retina
• 1-month-old mice exhibit an increase in the paracellular space in the interphotoreceptor matrix
• inner segments of cones are swollen
• 1-month-old mice show disorganized and shorter inner segments
• 1-month-old mice show disorganized and shorter inner segments
• one of the most abnormal structures seen in the outer segments is a pattern of spirals or concentric circles that contain darker stained membranes
• marker analysis suggests a loss of compartmentalization of the disc membranes
• 1-month-old mice show disorganized and shorter outer segments
• cone outer segments are practically missing
• retinas exhibit membranous aggregations of outer segments that are completely disorganized
• 1-month-old mice show disorganized and shorter outer segments and inner segments
• unusual intracellular vacuoles in the retinal pigment epithelium are seen in 1-month-old mice
• increase in inner nuclear layer thickness is seen at 20 months of age
• differences in outer nuclear layer thickness start to be significant from 3 months of age and the outer nuclear layer continues to degenerate over time
• retinas show a decrease in synaptic contacts between photoreceptors and horizontal cells and between photoreceptors and ON rod bipolar cells in the outer plexiform layer indicating aberrant synaptic connectivity within this layer
• total retinal thickness is thinner by 3 months of age
• retinas exhibit elevated reactive gliosis not only at the inner margin but also throughout the entire length of Muller cells
• ERG responses progressively diminish with age, with responses being more severely affected than in heterozygotes
• photopic ERG responses show a progressive age-dependent diminution in a- and b-wave values compared to wild-type mice
• the maximum scotopic a-wave values decrease from 1 month of age (34% reduction) to almost diminished (83% reduction) at 9 months of age
• the maximum scotopic b-wave responses are reduced, although the reduction is seen later than the a-wave reduction indicating that loss of function is earlier and more marked in the outer retina than in the inner retina
• visual acuity progressively decreases with age; mice show 29% reduction in visual acuity at 3 months of age and 78% reduction at 12 months of age

hematopoietic system
• retinas exhibit an increased number of Iba1+ cells with an ameboid shape, indicating microglial activation

immune system
• retinas exhibit an increased number of Iba1+ cells with an ameboid shape, indicating microglial activation
• 12-month-old retinas show an increase in CD45high, CD11b, and CD169 immunopositive populations, indicating microglial inflammation and/or recruitment of monocytes and macrophages
• an increase in activated immune-related cells (CD11b+CD11chighMHC class II+) is seen at 3, 6, 9, and 12 months
• the CD169+ population is increased at 12 months of age, indicating an increase in pathogenic phagocytes in the retina

nervous system
• retinas exhibit an increased number of Iba1+ cells with an ameboid shape, indicating microglial activation
• 1-month-old mice exhibit an increase in the paracellular space in the interphotoreceptor matrix
• inner segments of cones are swollen
• 1-month-old mice show disorganized and shorter inner segments
• 1-month-old mice show disorganized and shorter inner segments
• one of the most abnormal structures seen in the outer segments is a pattern of spirals or concentric circles that contain darker stained membranes
• marker analysis suggests a loss of compartmentalization of the disc membranes
• 1-month-old mice show disorganized and shorter outer segments
• cone outer segments are practically missing
• retinas exhibit membranous aggregations of outer segments that are completely disorganized
• 1-month-old mice show disorganized and shorter outer segments and inner segments
• mice show aberrant synaptic connectivity within the retina outer plexiform layer

pigmentation
• unusual intracellular vacuoles in the retinal pigment epithelium are seen in 1-month-old mice

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
partial central choroid dystrophy DOID:9822 OMIM:613105
J:342243




Genotype
MGI:7593962
ht2
Allelic
Composition
Prph2em1Sal/Prph2+
Genetic
Background
C57BL/6J-Prph2em1Sal
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Prph2em1Sal mutation (0 available); any Prph2 mutation (28 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
vision/eye
• the percentage of CD45high cell population is increased in retinas at 9 and 12 months of age
• outer segments look swollen
• the outer segments of cones show an unusual twisted appearance, losing the normal straight organization
• differences in outer nuclear layer thickness start to be significant from 6 months of age
• outer nuclear layer thickness diminishes progressively and smoothly with time
• however, no differences in thickness of the inner nuclear layer is seen
• total retinal thickness is thinner by 9 months of age
• ERG responses progressively diminish with age, with responses being less severely affected than in homozygotes
• the maximum scotopic a-wave values decrease from 6 months of age (33% reduction) and remain noticeable at 20 months of age
• the maximum scotopic b-wave responses are reduced
• visual acuity progressively decreases with age; mice show 24% reduction in visual acuity at 6 months of age and 32% reduction at 20 months of age

nervous system
• outer segments look swollen
• the outer segments of cones show an unusual twisted appearance, losing the normal straight organization
• pedicles (the synaptic terminals of cone photoreceptors) show some morphological alternations in the retina, showing unusual telodendria

immune system
• the percentage of CD45high cell population is increased in retinas at 9 and 12 months of age

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
partial central choroid dystrophy DOID:9822 OMIM:613105
J:342243





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last database update
11/12/2024
MGI 6.24
The Jackson Laboratory