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Phenotypes Associated with This Genotype
Genotype
MGI:3574621
Allelic
Composition
Muc2tm1Avel/Muc2tm1Avel
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Muc2tm1Avel mutation (0 available); any Muc2 mutation (81 available)
phenotype observed in females
phenotype observed in males
N normal phenotype

Spontaneous colitis in Muc2tm1Avel/Muc2tm1Avel mice

neoplasm
• found in about 65% of one year old mice, averaging about 1.5 tumors per mouse
• tumors appear first in the small intestine, then the large intestine, never in the stomach
• epithelial in origin, becoming invasive carcinomas in older mice

cardiovascular system
• fecal blood found as early as 6 months of age when gastrointestinal tumors can also be found

digestive/alimentary system
• fecal blood found as early as 6 months of age when gastrointestinal tumors can also be found
• mice exhibit distorted and flattened structure of the epithelial cells
• los of the mucus layer of the distal colon
• loss of lamina propria architecture
• the lamina propria shows an increase in total cells, CD4+ and CD8+ T lymphocytes and IgA-producing B cells
• absent in the intestine
• increase in crypt length, particularly in the distal colon
• found in about 65% of one year old mice, averaging about 1.5 tumors per mouse
• tumors appear first in the small intestine, then the large intestine, never in the stomach
• epithelial in origin, becoming invasive carcinomas in older mice
• mice exhibit bacteria on the epithelium and in crypts of the distal colon indicating compromised mucus barrier
• intestinal epithelial cells exhibit decreased apoptosis
• intestinal epithelial cells exhibit increased proliferation
• mice exhibit cell infiltration and superficial epithelial erosions that are more pronounced at the distal end of the colon
• the colon lamina propria shows an increase in total cells, CD4+ and CD8+ T lymphocytes and IgA-producing B cells
• only a subset of mutants show signs of inflammation in the colon characterized by neutrophil infiltration in the colon lamina propria corresponds with decreased number of CD103+CD11b- dendritic cells and increased number of CD103+CD11b+ dendritic cells and CD103-CD11b+ macrophages in the colon
• mice develop spontaneous colitis between 8 and 20 weeks of age
• mice exhibit a higher bacterial burden than controls in the colon and mesenteric lymph nodes due to compromised mucus barrier in the intestine

endocrine/exocrine glands
• increase in crypt length, particularly in the distal colon

immune system
• mice exhibit cell infiltration and superficial epithelial erosions that are more pronounced at the distal end of the colon
• the colon lamina propria shows an increase in total cells, CD4+ and CD8+ T lymphocytes and IgA-producing B cells
• only a subset of mutants show signs of inflammation in the colon characterized by neutrophil infiltration in the colon lamina propria corresponds with decreased number of CD103+CD11b- dendritic cells and increased number of CD103+CD11b+ dendritic cells and CD103-CD11b+ macrophages in the colon
• mice develop spontaneous colitis between 8 and 20 weeks of age
• mice exhibit a higher bacterial burden than controls in the colon and mesenteric lymph nodes due to compromised mucus barrier in the intestine

cellular
• absent in the intestine
• intestinal epithelial cells exhibit decreased apoptosis
• epithelial cells in the intestinal mucosa migrate more rapidly
• intestinal epithelial cells exhibit increased proliferation
• in intestinal epithelial cells

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
inflammatory bowel disease DOID:0050589 OMIM:PS266600
J:216831


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
04/16/2024
MGI 6.23
The Jackson Laboratory