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Phenotypes Associated with This Genotype
Genotype
MGI:4944070
Allelic
Composition
Cd44tm1Mak/Cd44tm1Mak
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cd44tm1Mak mutation (1 available); any Cd44 mutation (74 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
renal/urinary system
• decreased renal injury after bilateral renal ischemia reperfusion (I/R)
• reduced histopathologic changes in the corticomedullary region, such as tubular necrosis, dilation, and loss of brush border
• 24 hrs after bilateral renal I/R injury, the increase in serum urea and creatinine levels is significantly prevented
• renal function is improved by approximately 50% compared with wild-type mice
• renal function is fully restored after 14 d, whereas renal function of the wild type is still impaired

immune system
• modestly increased bacterial load in peritoneal lavage fluid at 6 h after infection during E. coli peritonitis, compared to wild-type mice
• similar bacterial load in peritoneal lavage fluid 20 h after infection or in other body compartments
• no differences in the number of neutrophils or macrophages in the peritoneal cavity
• no effect in the severity of organ injury induced by abdominal sepsis
• increased monocyte chemoattractant protein 2 (MCP-2) level in plasma at 6 h after infection during E. coli peritonitis
• decreased MCP-1 concentrations in plasma at 20 h after infection during E. coli peritonitis
• decreased TNF-alpha concentrations in plasma at 20 h after infection during E. coli peritonitis
• enhanced peritoneal MCP-2, keratinocyte-derived cytokine, and LPS-induced CXC chemokine release at 6 h after infection during E. coli peritonitis
• trend towards enhanced peritoneal MCP-1 release at 20 h after infection during E. coli peritonitis
• trend towards enhanced peritoneal IL-1beta release at 20 h after infection during E. coli peritonitis
• trend towards enhanced peritoneal IL-10 release at 20 h after infection during E. coli peritonitis
• enhanced peritoneal IL-6 release at 20 h after infection during E. coli peritonitis
• enhanced peritoneal TNF-alpha release at 20 h after infection during E. coli peritonitis
• reduced influx of neutrophils and macrophage into the postischemic kidney 1 d after I/R
• similar total leukocyte, neutrophil, lymphocyte or monocyte counts in peripheral blood

cardiovascular system
• absence of cellular ruffling and an irregular surface punctuated by retracted cells and/or very thin or flattened endothelial cells in the vessels invading subcutaneous Matrigel implants
• few pinocytotic vesicle in the microvessels
• reduced (20%) density of vessels at the edge of the wounds on day 3
• similar leukocyte recruitment compared with wild type
• reduced vessel densities of tumors compared to that of tumors in wild-type animals after subcutaneous injection of the B16 melanoma line and an ovarian tumor line
• similar leukocyte recruitment compared with wild type
• reduced vascularization around and within subcutaneously implanted Matrigel plugs containing B16 tumor cells
• decreased ability of the mutant endothelial cells to form tubular networks on Matrigel in vitro
• normal hyaluronan adhesion, proliferation, migration, and susceptibility to apoptotic stress in endothelial cells

neoplasm
• reduced (>70%) weight of both tumors compared to that of tumors in wild-type animals after subcutaneous injection of the B16 melanoma line and an ovarian tumor line

nervous system
• severe impairment of excitatory synaptic transmission in preBotC neurons
• moderately increased amplitude of glutamatergic mEPSCs in preBotC neurons
• decreased frequency of glutamatergic mEPSCs in preBotC neurons

digestive/alimentary system
• modestly increased bacterial load in peritoneal lavage fluid at 6 h after infection during E. coli peritonitis, compared to wild-type mice
• similar bacterial load in peritoneal lavage fluid 20 h after infection or in other body compartments
• no differences in the number of neutrophils or macrophages in the peritoneal cavity
• no effect in the severity of organ injury induced by abdominal sepsis

homeostasis/metabolism
• twenty-four hours after bilateral renal I/R injury, the increase in serum creatinine levels is significantly prevented
• renal function is improved by approximately 50% compared with wild-type mice
• renal function is fully restored after 14 d, whereas renal function of the wild type is still impaired
• increased monocyte chemoattractant protein 2 (MCP-2) level in plasma at 6 h after infection during E. coli peritonitis
• decreased MCP-1 concentrations in plasma at 20 h after infection during E. coli peritonitis
• decreased TNF-alpha concentrations in plasma at 20 h after infection during E. coli peritonitis
• twenty-four hours after bilateral renal I/R injury, the increase in serum urea levels is significantly prevented
• renal function is improved by approximately 50% compared with wild-type mice
• renal function is fully restored after 14 d, whereas renal function of the wild type is still impaired
• decreased renal injury after bilateral renal ischemia reperfusion (I/R)
• reduced histopathologic changes in the corticomedullary region, such as tubular necrosis, dilation, and loss of brush border
• 24 hrs after bilateral renal I/R injury, the increase in serum urea and creatinine levels is significantly prevented
• renal function is improved by approximately 50% compared with wild-type mice
• renal function is fully restored after 14 d, whereas renal function of the wild type is still impaired
• delayed wound closure during days 1 to 3 after wounding
• by day 7 have recovered and is similar to that of wild-type animals


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
01/06/2026
MGI 6.24
The Jackson Laboratory