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Phenotypes Associated with This Genotype
Genotype
MGI:2654780
Allelic
Composition
Mertktm1Grl/Mertktm1Grl
Genetic
Background
involves: 129P2/OlaHsd
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Mertktm1Grl mutation (2 available); any Mertk mutation (66 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
reproductive system
• mutant Sertoli cells show a 35% decrease in phagocytosis of apoptotic spermatogenic cells relative to wild-type controls, as determined by lipid droplet formation using Oil Red O staining

vision/eye
• outer segment tips of the retina are aberrantly extended into the RPE cell layer at P17 such that by P21, there is a 33% increase in overall outer segment length relative to wild-type
• by P35, the outer segment layer becomes very disordered compared to wild-type
• by 2 months of age, nearly all photoreceptors die by apoptosis
• retinal pigment epithelial cells are unable to phagocytose the distal ends of the photoreceptor outer segments

nervous system
• outer segment tips of the retina are aberrantly extended into the RPE cell layer at P17 such that by P21, there is a 33% increase in overall outer segment length relative to wild-type
• by P35, the outer segment layer becomes very disordered compared to wild-type
• by 2 months of age, nearly all photoreceptors die by apoptosis

hematopoietic system
• 2-fold increase in spleen size

cardiovascular system
N
• mice exhibit normal vascular permeability in the liver

immune system
• 2-fold increase in spleen size

pigmentation
• retinal pigment epithelial cells are unable to phagocytose the distal ends of the photoreceptor outer segments

growth/size/body
• 2-fold increase in spleen size


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)
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last database update
03/31/2026
MGI 6.24
The Jackson Laboratory