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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Cx3cr1+
wild type
MGI:2437537
Summary 7 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
Cx3cr1tm1Litt/Cx3cr1+ B6.129P2-Cx3cr1tm1Litt MGI:4833985
cn2
Cx3cr1tm1.1(cre)Jung/Cx3cr1+
Sqorem1Chji/Sqorem1Chji
B6(Cg)-Sqorem1Chji Cx3cr1tm1.1(cre)Jung MGI:6818637
cn3
Gpr35em2Niess/Gpr35em2Niess
Cx3cr1tm2.1(cre/ERT2)Litt/Cx3cr1+
involves: 129P2/OlaHsd * C57BL/6N MGI:6502846
cx4
Apoetm1Unc/Apoetm1Unc
Cx3cr1tm1Zm/Cx3cr1+
B6.129-Apoetm1Unc Cx3cr1tm1Zm MGI:3618279
cx5
Cx3cr1tm1Litt/Cx3cr1+
Psen1tm1Mpm/Psen1tm1Mpm
Tg(APPSwe,tauP301L)1Lfa/0
Tg(Thy1-YFP)HJrs/0
involves: 129P2/OlaHsd * 129S1/Sv * 129X1/SvJ * C57BL/6 * CBA MGI:4834197
cx6
Cx3cr1tm2.1(cre/ERT2)Litt/Cx3cr1+
Vps35Gt(RRK261)Byg/Vps35Gt(RRK261)Byg
involves: 129P2/OlaHsd * C57BL/6 MGI:6450125
cx7
Ccr2tm2.1Ifc/Ccr2tm2.1Ifc
Cx3cr1tm1Litt/Cx3cr1+
involves: 129P2/OlaHsd * C57BL/6 * FVB/N MGI:4868437


Genotype
MGI:4833985
ht1
Allelic
Composition
Cx3cr1tm1Litt/Cx3cr1+
Genetic
Background
B6.129P2-Cx3cr1tm1Litt
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cx3cr1tm1Litt mutation (6 available); any Cx3cr1 mutation (49 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• moderate following LPS exposure

immune system
• moderate following LPS exposure
• following induction of experimental autoimmune encephalomyelitis (EAE), mice exhibit intermediate EAE severity (including transient flaccid paresis) compared with homozygous and wild-type mice
• mice treated with anti-NK1.1 antibodies exhibit the same severity of EAE as in homozygous mice following induction of experimental autoimmune encephalomyelitis

behavior/neurological
• following induction of experimental autoimmune encephalomyelitis, mice exhibit transient flaccid paresis

hematopoietic system
• moderate following LPS exposure

cellular
• moderate following LPS exposure




Genotype
MGI:6818637
cn2
Allelic
Composition
Cx3cr1tm1.1(cre)Jung/Cx3cr1+
Sqorem1Chji/Sqorem1Chji
Genetic
Background
B6(Cg)-Sqorem1Chji Cx3cr1tm1.1(cre)Jung
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cx3cr1tm1.1(cre)Jung mutation (2 available); any Cx3cr1 mutation (49 available)
Sqorem1Chji mutation (0 available); any Sqor mutation (36 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• in an intracerebral hemorrhage model induced by collagenase injection into the left striatum, mice show no therapeutic effects of ADT-OH [5-(4-hydroxyphenyl)-3H-1, 2-dithiole-3-thione] as is seen in controls




Genotype
MGI:6502846
cn3
Allelic
Composition
Gpr35em2Niess/Gpr35em2Niess
Cx3cr1tm2.1(cre/ERT2)Litt/Cx3cr1+
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cx3cr1tm2.1(cre/ERT2)Litt mutation (2 available); any Cx3cr1 mutation (49 available)
Gpr35em2Niess mutation (0 available); any Gpr35 mutation (30 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
digestive/alimentary system
• in mice treated with tamoxifen and DSS
• however, treatment with TNF attenuates exacerbated DSS-induced colon reduction
• in mice treated with tamoxifen and DSS with increased body weight loss, disease activity scores, and enteroscopic and histological colitis scores, and reduced colon length that are not responsive to LPA treatment
• increased inflammation is not associated with higher macrophage infiltration into the colonic lamina prioria in mice treated with tamoxifen and DSS
• however, treatment with TNF attenuates exacerbated DSS-induced colitis

growth/size/body
• in mice treated with tamoxifen and DSS
• however, treatment with TNF attenuates exacerbated DSS-induced weight loss

immune system
• in mice treated with tamoxifen and DSS with increased body weight loss, disease activity scores, and enteroscopic and histological colitis scores, and reduced colon length that are not responsive to LPA treatment
• increased inflammation is not associated with higher macrophage infiltration into the colonic lamina prioria in mice treated with tamoxifen and DSS
• however, treatment with TNF attenuates exacerbated DSS-induced colitis

homeostasis/metabolism
• lower corticosterone concentrations from the supernatants of colonic explants of mice treated with tamoxifen and DSS
• however, treatment with TNF increases corticosterone concentrations from the supernatants of colonic explants of mice treated with tamoxifen and DSS




Genotype
MGI:3618279
cx4
Allelic
Composition
Apoetm1Unc/Apoetm1Unc
Cx3cr1tm1Zm/Cx3cr1+
Genetic
Background
B6.129-Apoetm1Unc Cx3cr1tm1Zm
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Apoetm1Unc mutation (35 available); any Apoe mutation (164 available)
Cx3cr1tm1Zm mutation (1 available); any Cx3cr1 mutation (49 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cardiovascular system
• lesion area in the thoracic aorta is decreased by about 50% compared to mice homozygous for the Apoe allele only




Genotype
MGI:4834197
cx5
Allelic
Composition
Cx3cr1tm1Litt/Cx3cr1+
Psen1tm1Mpm/Psen1tm1Mpm
Tg(APPSwe,tauP301L)1Lfa/0
Tg(Thy1-YFP)HJrs/0
Genetic
Background
involves: 129P2/OlaHsd * 129S1/Sv * 129X1/SvJ * C57BL/6 * CBA
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cx3cr1tm1Litt mutation (6 available); any Cx3cr1 mutation (49 available)
Psen1tm1Mpm mutation (4 available); any Psen1 mutation (61 available)
Tg(APPSwe,tauP301L)1Lfa mutation (3 available)
Tg(Thy1-YFP)HJrs mutation (3 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• microglial density increases over time around lost neurons unlike in Cx3cr1tm1Litt/Cx3cr1tm1Litt Psen1tm1Mpm/Psen1tm1Mpm Tg(APPSwe,tauP301L)1Lfa mice
• microglia migration velocity around lost neurons is 2-fold greater than in Cx3cr1tm1Litt heterozygotes and homozygotes
• of YFP+ layer III neurons at 4 to 6 months

immune system
• microglial density increases over time around lost neurons unlike in Cx3cr1tm1Litt/Cx3cr1tm1Litt Psen1tm1Mpm/Psen1tm1Mpm Tg(APPSwe,tauP301L)1Lfa mice
• microglia migration velocity around lost neurons is 2-fold greater than in Cx3cr1tm1Litt heterozygotes and homozygotes

hematopoietic system
• microglial density increases over time around lost neurons unlike in Cx3cr1tm1Litt/Cx3cr1tm1Litt Psen1tm1Mpm/Psen1tm1Mpm Tg(APPSwe,tauP301L)1Lfa mice
• microglia migration velocity around lost neurons is 2-fold greater than in Cx3cr1tm1Litt heterozygotes and homozygotes

cellular
• microglial density increases over time around lost neurons unlike in Cx3cr1tm1Litt/Cx3cr1tm1Litt Psen1tm1Mpm/Psen1tm1Mpm Tg(APPSwe,tauP301L)1Lfa mice
• microglia migration velocity around lost neurons is 2-fold greater than in Cx3cr1tm1Litt heterozygotes and homozygotes




Genotype
MGI:6450125
cx6
Allelic
Composition
Cx3cr1tm2.1(cre/ERT2)Litt/Cx3cr1+
Vps35Gt(RRK261)Byg/Vps35Gt(RRK261)Byg
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cx3cr1tm2.1(cre/ERT2)Litt mutation (2 available); any Cx3cr1 mutation (49 available)
Vps35Gt(RRK261)Byg mutation (1 available); any Vps35 mutation (46 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cellular
• increased number of anti-inflammatory microglia in periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• increased number of microglia in ipsilateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• normal number of microglia in contralateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• after induced cortical ischemic stroke following tamoxifen-induced knockout
• decreased severity of motor function deficits after cortical ischemic stroke induced close to sensorimotor cortex following tamoxifen-induced knockout

hematopoietic system
• increased number of anti-inflammatory microglia in periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• increased number of microglia in ipsilateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• normal number of microglia in contralateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• increased number of macrophages in ipsilateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• normal number of macrophages in contralateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout

homeostasis/metabolism
• increased expression of TGFB in ipsilateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• after induced cortical ischemic stroke following tamoxifen-induced knockout

immune system
• increased number of anti-inflammatory microglia in periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• increased number of microglia in ipsilateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• normal number of microglia in contralateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• increased number of macrophages in ipsilateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• normal number of macrophages in contralateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• reduced expression of IL1B in ipsilateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• increased expression of IL10 in ipsilateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• increased expression of IL4 in ipsilateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• reduced expression of IL6 in ipsilateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• reduced expression of TNFA in ipsilateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout

mortality/aging
• decreased cortex infarction size after induced cortical ischemic stroke following tamoxifen-induced knockout
• decreased neuronal cell death after induced cortical ischemic stroke following tamoxifen-induced knockout
• decreased severity of motor function deficits after cortical ischemic stroke induced close to sensorimotor cortex following tamoxifen-induced knockout
• lower increase of astrocyte number (reduced astrocytosis) in periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• increased number of anti-inflammatory microglia in periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• reduced number of pro-inflammatory microglia in periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout

nervous system
• increased number of anti-inflammatory microglia in periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• increased number of microglia in ipsilateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• normal number of microglia in contralateral periinfarct area after induced cortical ischemic stroke following tamoxifen-induced knockout
• after induced cortical ischemic stroke following tamoxifen-induced knockout
• decreased severity of motor function deficits after cortical ischemic stroke induced close to sensorimotor cortex following tamoxifen-induced knockout
• after induced cortical ischemic stroke following tamoxifen-induced knockout




Genotype
MGI:4868437
cx7
Allelic
Composition
Ccr2tm2.1Ifc/Ccr2tm2.1Ifc
Cx3cr1tm1Litt/Cx3cr1+
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6 * FVB/N
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Ccr2tm2.1Ifc mutation (2 available); any Ccr2 mutation (44 available)
Cx3cr1tm1Litt mutation (6 available); any Cx3cr1 mutation (49 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
• in a mouse model of thioglycollate-induced peritonitis, monocyte recruitment is reduced compared to in similarly treated wild-type mice
• mice exhibit delayed onset and severity of experimental autoimmune encephalomyelitis with reduced monocyte infiltration into the central nervous system and decreased microglial cell activation compared with similarly treated wild-type mice

hematopoietic system
• in a mouse model of thioglycollate-induced peritonitis, monocyte recruitment is reduced compared to in similarly treated wild-type mice





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last database update
12/30/2025
MGI 6.24
The Jackson Laboratory