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Phenotypes Associated with This Genotype
Genotype
MGI:3623586
Allelic
Composition
Mfge8Gt(KST227)Byg/Mfge8Gt(KST227)Byg
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Mfge8Gt(KST227)Byg mutation (3 available); any Mfge8 mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
reproductive system

immune system
• impaired engulfment of apoptotic thymocytes
• inflammation of the mammary glands is seen by day 4 of involution
• age dependent splenomegaly

hematopoietic system
• impaired engulfment of apoptotic thymocytes
• age dependent splenomegaly

endocrine/exocrine glands
• on the first and second days of involution increased apoptotic bodies are seen in the alveolar lumens and alveolar collapse and fat cell repopulation are delayed; however no increase in the number of apoptotic cells in the epithelium is seen
• engulfment of apoptotic cells by alveolar epithelial cells is reduced
• at 4 weeks of age ducts appear normal but by 8 weeks dilation and distension of the ducts is seen in some homozygotes
• progressive ductal dilation of the primary, secondary, and tertiary ducts is seen with repeated pregnancies; however duct diameter is similar to wild-type in 9 month old virgin mice
• inflammation of the mammary glands is seen by day 4 of involution

integument
• on the first and second days of involution increased apoptotic bodies are seen in the alveolar lumens and alveolar collapse and fat cell repopulation are delayed; however no increase in the number of apoptotic cells in the epithelium is seen
• engulfment of apoptotic cells by alveolar epithelial cells is reduced
• at 4 weeks of age ducts appear normal but by 8 weeks dilation and distension of the ducts is seen in some homozygotes
• progressive ductal dilation of the primary, secondary, and tertiary ducts is seen with repeated pregnancies; however duct diameter is similar to wild-type in 9 month old virgin mice
• inflammation of the mammary glands is seen by day 4 of involution

growth/size/body
• age dependent splenomegaly

cellular
• impaired engulfment of apoptotic thymocytes


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
01/20/2026
MGI 6.24
The Jackson Laboratory