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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
H2-T18b
b variant
MGI:4820508
Summary 2 genotypes


Genotype
MGI:3822756
cx1
Allelic
Composition
H2-T18b/H2-T18b
H2-T3tm1Luc/H2-T3tm1Luc
Tcratm1Mom/Tcratm1Mom
Genetic
Background
B6.Cg-Tcratm1Mom H2-T3tm1Luc
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
H2-T18b mutation (12 available); any H2-T18 mutation (54 available)
H2-T3tm1Luc mutation (1 available); any H2-T3 mutation (25 available)
Tcratm1Mom mutation (6 available); any Tcra mutation (101 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• there is a 35% mortality rate resulting from colitis compared to 8.3% mortality of Tcratm1Mom homozygote controls

digestive/alimentary system
• mice have a higher incidence of colitis and a more severe disease than control mice that are only homozygote for the Tcratm1Mom null allele
• 83% of mice have colitis compared to 14% of controls at 30 weeks of age
• the first signs of disease occur at 15 weeks of age compared to 20 weeks of age in controls
• higher incidence of pathological lesions occurs in the colon of these mice, including loss of goblet cells, elongation of crypts, and inflammatory infiltration of the colon walls
• there is a 35% mortality rate resulting from colitis compared to 8.3% of controls

immune system
• mice have a higher incidence of colitis and a more severe disease than control mice that are only homozygote for the Tcratm1Mom null allele
• 83% of mice have colitis compared to 14% of controls at 30 weeks of age
• the first signs of disease occur at 15 weeks of age compared to 20 weeks of age in controls
• higher incidence of pathological lesions occurs in the colon of these mice, including loss of goblet cells, elongation of crypts, and inflammatory infiltration of the colon walls
• there is a 35% mortality rate resulting from colitis compared to 8.3% of controls
• mice have higher numbers of gamma-delta and TCRbeta-beta IEL in the colon both before and after the onset of colitis compared to Tcratm1Mom homozygote controls
• mesenteric lymph nodes are enlarged in these mice with about a 2-fold increase in cell number compared to Tcratm1Mom homozygote controls
• this increase in cellularity occurs regardless if mice have developed colitis or not
• TCRbeta-beta T cells isolated from the mesenteric lymph nodes produce around 4-fold more IL-4 than controls

hematopoietic system
• mice have higher numbers of gamma-delta and TCRbeta-beta IEL in the colon both before and after the onset of colitis compared to Tcratm1Mom homozygote controls




Genotype
MGI:3822755
cx2
Allelic
Composition
H2-T18b/H2-T18b
H2-T3tm1Luc/H2-T3tm1Luc
Genetic
Background
C57BL/6-H2-T3tm1Luc
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
H2-T18b mutation (12 available); any H2-T18 mutation (54 available)
H2-T3tm1Luc mutation (1 available); any H2-T3 mutation (25 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
immune system
• differences at higher doses of anti-CD3 are not significant
• enhanced proliferation of IELs can be suppressed to wild-type levels when cultured in the presence of tumor cells bearing TL antigen
• IEL activation by low amounts of plate bound anti-CD3 is enhanced compared to controls
• colonic alpha-beta IELs expressing CD8-alpha homodimers have almost a 2-fold higher homeostatic proliferation rate in vivo
• enriched small intestine alpha-beta IEL have enhanced proliferation compared to controls in response to low amounts of plate bound anti-CD3
• when epithelial cells are removed from IEL culture, there is no longer a difference in the proliferative responses of IEL to anti-CD3
• colonic gamma-delta IELs expressing CD8-alpha homodimers have almost a 3-fold higher homeostatic proliferation rate in vivo
• intestinal intraepithelial lymphocytes have enhanced IFN-gamma secretion in response to anti-CD3 stimulation

hematopoietic system
• IEL activation by low amounts of plate bound anti-CD3 is enhanced compared to controls
• differences at higher doses of anti-CD3 are not significant
• enhanced proliferation of IELs can be suppressed to wild-type levels when cultured in the presence of tumor cells bearing TL antigen
• colonic alpha-beta IELs expressing CD8-alpha homodimers have almost a 2-fold higher homeostatic proliferation rate in vivo
• enriched small intestine alpha-beta IEL have enhanced proliferation compared to controls in response to low amounts of plate bound anti-CD3
• when epithelial cells are removed from IEL culture, there is no longer a difference in the proliferative responses of IEL to anti-CD3
• colonic gamma-delta IELs expressing CD8-alpha homodimers have almost a 3-fold higher homeostatic proliferation rate in vivo





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last database update
10/29/2024
MGI 6.24
The Jackson Laboratory