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Phenotypes Associated with This Genotype
Genotype
MGI:2174977
Allelic
Composition
Nos2tm1Lau/Nos2tm1Lau
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Nos2tm1Lau mutation (8 available); any Nos2 mutation (67 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• reduced survival 8 days after 30 minutes of experimentally induced kidney eschemia relative to controls

cardiovascular system
N
• blood pressure and heart rate are normal
• blood pressure drops less in response to LPS injection than it does in controls

homeostasis/metabolism
N
• after injection of platelet-activating factor (PAF), >90% mortality occurs within 30 minutes, similar to wild-type controls
• pretreatment with wortmannin before PAF treatment confers 100% protection to mutants and wild-type
• higher plasma creatinine levels 24 hours after experimentally induced kidney eschemia than in controls
• elevation in plasma AVP due to LPS injection persists longer than controls, still significantly elevated after 6 hours whereas levels more moderately elevated in controls aftr 4 hours.
• plasma leptin concentrations are significantly reduced
• elevated tissue myeloperoxidase levels relative to controls 9 days after kidney eschemia
• hyperglycemic in the first 30 minutes of a glucose tolerance test
• return to fasting glucose levels by 90 minutes when controls are still hyperglycemic

immune system
N
• growth of Mycobacterium leprae unaffected (J:64036)
• homozygotes are indistinguishable from wild-type in appearance, histology, growth rate, reproduction, and in mortality in an LPS-induced model of septic shock (J:29677)
• increased numbers of both CD4+ and CD8+ cells in inguinal lymph nodes
• increased cellularity of inguinal lymph nodes
• primary immune responses are unaffected
• increased T-cell proliferative response to protein antigens
• "clonal burst size" is unchanged
• greatly increased granulomatous inflammation when infected with Mycobacterium leprae
• resembles borderline tuberculoid lesions of leprosy
• intracellular growth of Mycobacterium tuberculosis and Francisella tularensis is increased but to highly variable extent

neoplasm
• increased rate of growth of ascites tumor cells
• no apoptosis in ascites tumor cells 2 weeks after innoculation
• growth of solid tumors from ascites tumor cells is prevented

adipose tissue
• reduced amounts of epididymal white adipose tissue

reproductive system
• significantly increased diameter and volume
• 31% increase
• numbers of pachytene spermatocytes and round spermatids are increased
• decreased apoptosis of pachytene, early round spermatids at stages I-IV, and diplotene dividing spermatocytes at stages XI-XII
• reduced heat induced apoptosis
• 65.5% increase in sperm content
• significantly higher numbers of 2-celled embryos produced when homozygotes are intercrossed
• blastocyst formation is similar to controls
• fertilization rate of mutant sperm and normal ova is significantly higher than controls
• fertilization rate of mutant ova and normal sperm is much higher than controls

endocrine/exocrine glands
• significantly increased diameter and volume
• 31% increase

hematopoietic system
• increased T-cell proliferative response to protein antigens
• "clonal burst size" is unchanged
• increased numbers of both CD4+ and CD8+ cells in inguinal lymph nodes

growth/size/body
• experience greater weight gain on a high fat diet

behavior/neurological
• consume 1.6 times as much food as controls on a high fat diet

integument
• greatly increased granulomatous inflammation when infected with Mycobacterium leprae
• resembles borderline tuberculoid lesions of leprosy

cellular
• numbers of pachytene spermatocytes and round spermatids are increased
• decreased apoptosis of pachytene, early round spermatids at stages I-IV, and diplotene dividing spermatocytes at stages XI-XII
• reduced heat induced apoptosis
• increased T-cell proliferative response to protein antigens
• "clonal burst size" is unchanged


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
03/18/2025
MGI 6.24
The Jackson Laboratory