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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Tbx18+
wild type
MGI:2441023
Summary 7 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
cn1
Sox2tm4.1Skn/Sox2tm4.1Skn
Tbx18tm2.1(cre)Sev/Tbx18+
involves: 129S1/Sv MGI:5461657
cn2
Hprt1tm4(CAG-Tbx18*,-Venus)Akis/Y
Gt(ROSA)26Sortm4(ACTB-tdTomato,-EGFP)Luo/Gt(ROSA)26Sor+
Tbx18tm4(cre)Akis/Tbx18+
involves: 129S1/Sv * 129S1/SvImJ * 129X1/SvJ * NMRI MGI:5576973
cn3
Hprt1tm4(CAG-Tbx18*,-Venus)Akis/Y
Tbx18tm4(cre)Akis/Tbx18+
involves: 129S1/SvImJ * NMRI MGI:5576974
cn4
Hprt1tm3(CAG-Tbx18,-Venus)Akis/Y
Tbx18tm4(cre)Akis/Tbx18+
involves: 129S1/SvImJ * NMRI MGI:5576972
cn5
Gt(ROSA)26Sortm1Sor/Gt(ROSA)26Sor+
Tbx18tm4(cre)Akis/Tbx18+
Wt1tm1Jae/Wt1tm1Jae
involves: 129S4/SvJae MGI:3841149
cn6
Fkbp1atm1.1Shou/Fkbp1atm1Zuk
Tbx18tm2(cre)Sev/Tbx18+
involves: 129S7/SvEvBrd MGI:5490250
cn7
Hprt1tm1(CAG-Sox9,-EGFP)Akis/Y
Tbx18tm4(cre)Akis/Tbx18+
involves: 129/Sv * 129S1/SvImJ * NMRI MGI:4849535


Genotype
MGI:5461657
cn1
Allelic
Composition
Sox2tm4.1Skn/Sox2tm4.1Skn
Tbx18tm2.1(cre)Sev/Tbx18+
Genetic
Background
involves: 129S1/Sv
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Sox2tm4.1Skn mutation (1 available); any Sox2 mutation (56 available)
Tbx18tm2.1(cre)Sev mutation (0 available); any Tbx18 mutation (34 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
integument
• hair shaft outgrowth is markedly delayed after birth compared to controls (heterozygotes); guard hair shaft lengths are significantly shorter than controls at P8 and later stages, indicating reduced outgrowth speed
• guard and awl/auchene hairs are 20-55% shorter in mutants, while zigzag hairs are comparable to heterozygous controls
• proliferation and differentiation of matrix progenitor cells are normal
• BrdU labeling of matrix cells at P5 indicates that, while proliferation is normal in mutants, the rate of transition into the hair shaft area is delayed; delay in migration is observed up to 48 hours after BrdU injection; upward movement of differentiation matrix progenitor cells is impaired
• migration of hair shaft progenitors in mutant zigzag follicles is much slower than in control guard hairs; migration speed of mutant guard hairs is reduced and becomes comparable to the speed of migration of control or mutant zigzag follicles




Genotype
MGI:5576973
cn2
Allelic
Composition
Hprt1tm4(CAG-Tbx18*,-Venus)Akis/Y
Gt(ROSA)26Sortm4(ACTB-tdTomato,-EGFP)Luo/Gt(ROSA)26Sor+
Tbx18tm4(cre)Akis/Tbx18+
Genetic
Background
involves: 129S1/Sv * 129S1/SvImJ * 129X1/SvJ * NMRI
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gt(ROSA)26Sortm4(ACTB-tdTomato,-EGFP)Luo mutation (10 available); any Gt(ROSA)26Sor mutation (1095 available)
Hprt1tm4(CAG-Tbx18*,-Venus)Akis mutation (0 available); any Hprt1 mutation (1280 available)
Tbx18tm4(cre)Akis mutation (0 available); any Tbx18 mutation (34 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cardiovascular system
• epicardial cells exhibit premature smooth muscle cell differentiation and fail to invade into the right ventricular myocardium unlike in wild-type mice




Genotype
MGI:5576974
cn3
Allelic
Composition
Hprt1tm4(CAG-Tbx18*,-Venus)Akis/Y
Tbx18tm4(cre)Akis/Tbx18+
Genetic
Background
involves: 129S1/SvImJ * NMRI
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Hprt1tm4(CAG-Tbx18*,-Venus)Akis mutation (0 available); any Hprt1 mutation (1280 available)
Tbx18tm4(cre)Akis mutation (0 available); any Tbx18 mutation (34 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging

cardiovascular system
N
• cardiomyocytes apoptosis and size are normal
• sinus horn defects
• beginning at E12.5 and worsening at E14.5
• in the right ventricular myocardium at E12.5 and E13.5

cellular
• in the right ventricular myocardium at E12.5 and E13.5

muscle
• beginning at E12.5 and worsening at E14.5
• in the right ventricular myocardium at E12.5 and E13.5




Genotype
MGI:5576972
cn4
Allelic
Composition
Hprt1tm3(CAG-Tbx18,-Venus)Akis/Y
Tbx18tm4(cre)Akis/Tbx18+
Genetic
Background
involves: 129S1/SvImJ * NMRI
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Hprt1tm3(CAG-Tbx18,-Venus)Akis mutation (0 available); any Hprt1 mutation (1280 available)
Tbx18tm4(cre)Akis mutation (0 available); any Tbx18 mutation (34 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• although present in Mendelian ratios at E18.5, mice are not recovered after birth

cardiovascular system
N
• heart morphology is normal at E18.5




Genotype
MGI:3841149
cn5
Allelic
Composition
Gt(ROSA)26Sortm1Sor/Gt(ROSA)26Sor+
Tbx18tm4(cre)Akis/Tbx18+
Wt1tm1Jae/Wt1tm1Jae
Genetic
Background
involves: 129S4/SvJae
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gt(ROSA)26Sortm1Sor mutation (10 available); any Gt(ROSA)26Sor mutation (1095 available)
Tbx18tm4(cre)Akis mutation (0 available); any Tbx18 mutation (34 available)
Wt1tm1Jae mutation (3 available); any Wt1 mutation (34 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cardiovascular system
• the formation of the epicardium is severely compromised in E12.5 embryos




Genotype
MGI:5490250
cn6
Allelic
Composition
Fkbp1atm1.1Shou/Fkbp1atm1Zuk
Tbx18tm2(cre)Sev/Tbx18+
Genetic
Background
involves: 129S7/SvEvBrd
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Fkbp1atm1.1Shou mutation (0 available); any Fkbp1a mutation (12 available)
Fkbp1atm1Zuk mutation (0 available); any Fkbp1a mutation (12 available)
Tbx18tm2(cre)Sev mutation (0 available); any Tbx18 mutation (34 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
cardiovascular system
N
• animals show normal ventricular chamber formation; normal trabeculation and compaction in ventricles are observed




Genotype
MGI:4849535
cn7
Allelic
Composition
Hprt1tm1(CAG-Sox9,-EGFP)Akis/Y
Tbx18tm4(cre)Akis/Tbx18+
Genetic
Background
involves: 129/Sv * 129S1/SvImJ * NMRI
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Hprt1tm1(CAG-Sox9,-EGFP)Akis mutation (0 available); any Hprt1 mutation (1280 available)
Tbx18tm4(cre)Akis mutation (0 available); any Tbx18 mutation (34 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
renal/urinary system
• mice exhibit excessive deposition of glycosamiglycans/mucopolysaccharides compared with wild-type mice
• the composition of ureter extracellular matrix is altered compared to in wild-type mice
• however, radial patterning of ureteric mesenchyme is normal
• mice exhibit disorganized smooth muscle layers in the ureters with round smooth muscle cells





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last database update
03/18/2025
MGI 6.24
The Jackson Laboratory