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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Col8a2tm1.1Asj
targeted mutation 1.1, Albert S Jun
MGI:5305275
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Col8a2tm1.1Asj/Col8a2tm1.1Asj involves: 129S6/SvEvTac MGI:5796117
hm2
Col8a2tm1.1Asj/Col8a2tm1.1Asj involves: 129S6/SvEvTac * C57BL/6 * CBA MGI:5305276


Genotype
MGI:5796117
hm1
Allelic
Composition
Col8a2tm1.1Asj/Col8a2tm1.1Asj
Genetic
Background
involves: 129S6/SvEvTac
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Col8a2tm1.1Asj mutation (1 available); any Col8a2 mutation (19 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
• dilated RER is observed in corneal endothelium of mice at 20 and 40 weeks
• abnormal accumulation of mitochondria in 20 week old mice
• presence of large amorphous regions in corneal endothelium of 40 week old mice

vision/eye
• corneal guttae (focal outgrowths) or Descemet membrane excrescences observed at 20 weeks of age
• guttae increase in number over time
• progressive decrease in cell density of corneal endothelial cells as compared to controls
• phenotype is more severe than in mice carrying the Col8a2tm2.1Asj allele
• 26% fewer cells at 20 weeks of age; 36% fewer cells at 40 weeks of age; 68% fewer cells at 80 weeks of age as compared to controls
• progressive increase in number of corneal endothelial cells that do not exhibit a hexagonal morphology
• by 80 weeks 2+/-5% of cells exhibit hexagonal shape
• dilated RER is observed in corneal endothelium of mice at 20 and 40 weeks

homeostasis/metabolism
• abnormal accumulation of mitochondria in 20 week old mice
• presence of large amorphous regions in corneal endothelium of 40 week old mice




Genotype
MGI:5305276
hm2
Allelic
Composition
Col8a2tm1.1Asj/Col8a2tm1.1Asj
Genetic
Background
involves: 129S6/SvEvTac * C57BL/6 * CBA
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Col8a2tm1.1Asj mutation (1 available); any Col8a2 mutation (19 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
vision/eye
• at 5 and 10 months of age the endothelium shows accumulation of Descemet membrane excrescences
• at 5 and 10 months of age the endothelium shows progressive variability in size and shape of cells and accumulation of Descemet membrane excrescences
• progressive reduction in central endothelial cell densities at 5 and 10 months of age
• at 5 months of age prominent, dilated rough endoplasmic reticulum are seen
• at 10 months of age extremely dilated rough endoplasmic reticulum and abnormal mitochondrion are seen

cellular
• at 5 months of age prominent, dilated rough endoplasmic reticulum are seen in corneal endothelial cells
• at 10 months of age extremely dilated rough endoplasmic reticulum are seen in corneal endothelial cells
• abnormal mitochondrion are seen in corneal endothelial cells in mice at 10 months of age
• in corneal endothelial cells





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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
10/29/2024
MGI 6.24
The Jackson Laboratory