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Phenotypes Associated with This Genotype
Genotype
MGI:5488508
Allelic
Composition
Fcgr2btm1Ttk/Fcgr2btm1Ttk
Tlr7tm1Flv/Y
X/Yaa
Genetic
Background
B6.Cg-Fcgr2btm1Ttk Tlr7tm1Flv Yaa
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fcgr2btm1Ttk mutation (7 available); any Fcgr2b mutation (49 available)
Tlr7tm1Flv mutation (1 available); any Tlr7 mutation (21 available)
Yaa mutation (23 available); any Yaa mutation (27 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• survival is prolonged compared to mutant mice wild-type for Tlr7

immune system
• less severe at 5 months of age compared to mutant mice wild-type for Tlr7
• activation of splenocytes is reduced compared to mutant mice wild-type for Tlr7
• autoantibodies show a homogeneous nuclear pattern
• develop a lupus like syndrome at a later age and in lower numbers compared to mutant mice wild-type for Tlr7
• increase in anti-RNA IgG levels in the serum at 4 - 6 months of age is less severe than in mutant mice wild-type for Tlr7 and is similar to mice homozygous for Fcgr2btm1Ttk alone

renal/urinary system
• kidney disease is less severe at 5 months of age compared to mutant mice wild-type for Tlr7

hematopoietic system
• less severe at 5 months of age compared to mutant mice wild-type for Tlr7
• activation of splenocytes is reduced compared to mutant mice wild-type for Tlr7

growth/size/body
• less severe at 5 months of age compared to mutant mice wild-type for Tlr7


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
03/18/2025
MGI 6.24
The Jackson Laboratory