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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Grk6tm1.1Mca
targeted mutation 1.1, Marc G Caron
MGI:2661089
Summary 3 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Grk6tm1.1Mca/Grk6tm1.1Mca B6.129S4-Grk6tm1.1Mca MGI:5694620
hm2
Grk6tm1.1Mca/Grk6tm1.1Mca involves: 129S4/SvJae * C57BL/6J MGI:2661090
ht3
Grk6tm1.1Mca/Grk6+ involves: 129S4/SvJae * C57BL/6J MGI:2661094


Genotype
MGI:5694620
hm1
Allelic
Composition
Grk6tm1.1Mca/Grk6tm1.1Mca
Genetic
Background
B6.129S4-Grk6tm1.1Mca
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Grk6tm1.1Mca mutation (1 available); any Grk6 mutation (36 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
hematopoietic system
• bone marrow derived macrophages exhibit a decrease in ability to engulf apoptotic cells
• phagocytosis of injected apoptotic thymocytes by splenic macrophages is about 1/3 less than by wild-type macrophages indicating impaired engulfment
• spleens have many undigested apoptotic cells
• splenic red pulp macrophages isolated from mutants exhibit a defect in ability to take up dead red blood cells in vitro
• splenic macrophages in vivo show attenuated phagocytosis of injected dead red blood cells
• however, numbers of red pulp splenic macrophages are normal
• mice develop age-dependent splenomegaly associated with increased numbers of splenocytes
• spleens are about 1.6-fold heavier at 40 weeks of age
• the ratio of CD4/CD8-T cells is increased, with a decrease in the CD8-T cell population
• the ratio of CD62Llo/CD62Lhi cells among the CD8+ memory T-cell population is increased
• nave T cells (CD44lo and CD62Lhi) are decreased
• decrease in the CD8-positive T cell population
• memory T cells (CD44hi) are increased
• the ratio of CD62Llo/CD62Lhi cells among the CD8+ memory T-cell population is increased
• splenic iron concentrations are increased with an increase in iron accumulation in the spleen red pulp
• mice injected with phenylhydrazine to induce acute hemolysis or mice that undergo phlebotomy to induce acute anemia exhibit more iron deposition in the spleen than wild-type mice
• however, serum iron parameters and life spans of red blood cells are normal
• white pulp in the spleen in enlarged
• increase in IgG deposition in the kidney of aged mice

homeostasis/metabolism
• splenic iron concentrations are increased with an increase in iron accumulation in the spleen red pulp
• mice injected with phenylhydrazine to induce acute hemolysis or mice that undergo phlebotomy to induce acute anemia exhibit more iron deposition in the spleen than wild-type mice
• however, serum iron parameters and life spans of red blood cells are normal

immune system
• bone marrow derived macrophages exhibit a decrease in ability to engulf apoptotic cells
• phagocytosis of injected apoptotic thymocytes by splenic macrophages is about 1/3 less than by wild-type macrophages indicating impaired engulfment
• spleens have many undigested apoptotic cells
• splenic red pulp macrophages isolated from mutants exhibit a defect in ability to take up dead red blood cells in vitro
• splenic macrophages in vivo show attenuated phagocytosis of injected dead red blood cells
• however, numbers of red pulp splenic macrophages are normal
• mice develop age-dependent splenomegaly associated with increased numbers of splenocytes
• spleens are about 1.6-fold heavier at 40 weeks of age
• the ratio of CD4/CD8-T cells is increased, with a decrease in the CD8-T cell population
• the ratio of CD62Llo/CD62Lhi cells among the CD8+ memory T-cell population is increased
• nave T cells (CD44lo and CD62Lhi) are decreased
• decrease in the CD8-positive T cell population
• memory T cells (CD44hi) are increased
• the ratio of CD62Llo/CD62Lhi cells among the CD8+ memory T-cell population is increased
• splenic iron concentrations are increased with an increase in iron accumulation in the spleen red pulp
• mice injected with phenylhydrazine to induce acute hemolysis or mice that undergo phlebotomy to induce acute anemia exhibit more iron deposition in the spleen than wild-type mice
• however, serum iron parameters and life spans of red blood cells are normal
• white pulp in the spleen in enlarged
• increase in IgG deposition in the kidney of aged mice
• 40 week old mice exhibit increased anti-dsDNA antibody levels
• mesangial expansion in aged mice indicating glomerulonephritis

renal/urinary system
• mesangial expansion in aged mice indicating glomerulonephritis
• mesangial expansion in aged mice

cellular
• bone marrow derived macrophages exhibit a decrease in ability to engulf apoptotic cells
• phagocytosis of injected apoptotic thymocytes by splenic macrophages is about 1/3 less than by wild-type macrophages indicating impaired engulfment
• spleens have many undigested apoptotic cells
• splenic red pulp macrophages isolated from mutants exhibit a defect in ability to take up dead red blood cells in vitro
• splenic macrophages in vivo show attenuated phagocytosis of injected dead red blood cells
• however, numbers of red pulp splenic macrophages are normal

growth/size/body
• mice develop age-dependent splenomegaly associated with increased numbers of splenocytes
• spleens are about 1.6-fold heavier at 40 weeks of age




Genotype
MGI:2661090
hm2
Allelic
Composition
Grk6tm1.1Mca/Grk6tm1.1Mca
Genetic
Background
involves: 129S4/SvJae * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Grk6tm1.1Mca mutation (1 available); any Grk6 mutation (36 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• mutants exhibit supersensitivity to psychostimulants, showing increased horizontal movement in response to amphetamine and beta-phenylethylamine relative to wild-type
• supersensitivity is due to inceased responsiveness of postsynaptic dopamine receptors
• increased horizontal behavior in response to cocaine relative to wild-type
• increased horizontal movement in response to cocaine, amphetamine, and beta-phenylethylamine relative to wild-type littermates
• mutants exhibit exaggerated locomotor responses to combined stimulation of dopamine 1 (D1) and dopamine 2 (D2) receptors

immune system
• impaired chemotaxic response to CXCL12 but less obviously than for T cells
• impaired chemotaxic response to CXCL12

hematopoietic system
• impaired chemotaxic response to CXCL12 but less obviously than for T cells
• impaired chemotaxic response to CXCL12




Genotype
MGI:2661094
ht3
Allelic
Composition
Grk6tm1.1Mca/Grk6+
Genetic
Background
involves: 129S4/SvJae * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Grk6tm1.1Mca mutation (1 available); any Grk6 mutation (36 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• mutants exhibit supersensitivity to psychostimulants, showing increased horizontal movement in response to amphetamine and beta-phenylethylamine relative to wild-type
• supersensitivity is due to increased responsiveness of postsynaptic dopamine receptors
• increased horizontal behavior in response to cocaine relative to wild-type
• increased horizontal movement in response to cocaine, amphetamine, and beta-phenylethylamine relative to wild-type littermates





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last database update
04/23/2024
MGI 6.23
The Jackson Laboratory