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Phenotypes Associated with This Genotype
Genotype
MGI:3621556
Allelic
Composition
Nos2tm1Lau/Nos2tm1Lau
Genetic
Background
B6.129P2-Nos2tm1Lau
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
N
• better survival after myocardial infarction than for wild-type controls
• increased sensitivity to ionizing radiation

cardiovascular system
N
• unlike mice null for Nos3, ischemia induced retinal neovascularization is not significantly different from controls
• choroidal neovascularization following laser-induced rupture of Bruch's membrane is reduced
• retinal revascularization after ischemia produces small highly branched blood vessels
• three fold more branching occurs in revascularization than occurs in controls
• increased hyalination and patchy loss of cross-striations when on 100% oxygen
• hypoxia causes less increase in the RV/LV+Septum ratio than is found in controls
• left ventricular maximum developed pressure was similar to sham operated animals 4 months after myocardial infarction rather than being reduced as in wild-type controls
• more significant drop in systolic blood pressure after myocardial infarction than is seen in controls

vision/eye
• choroidal neovascularization following laser-induced rupture of Bruch's membrane is reduced

nervous system
• shortened latency to seizures induced by kainic acid when on a normal diet
• behavior responses correspond to grade V seizures
• latency to seizure is prolonged when fed a ketogenic diet
• decreased numbers of mature oligodendrocytes after cuprizone treatment
• numbers of oligodendrocytes reduced to 50% of controls after 3.5 weeks
• undergo increased apoptosis which is not seen for microglia and astrocytes
• increased myelin pathology after treatment with cuprizone
• recover better from compression injury to the spinal cord than do controls, severity of behavioral deficit due to injury is somewhat less

digestive/alimentary system
• less susceptibility to dextran sodium sulfate induced colitis
• less severe weight loss, blood loss and macroscopic damage
• improved survival

homeostasis/metabolism
• shorter time to thrombus formation and vessel occlusion
• increased platelet deposition
• no effect on streptozotocin induced diabetis
• increased sensitivity to ionizing radiation
• recover better from compression injury to the spinal cord than do controls, severity of behavioral deficit due to injury is somewhat less

behavior/neurological
• shortened latency to seizures induced by kainic acid when on a normal diet
• behavior responses correspond to grade V seizures
• latency to seizure is prolonged when fed a ketogenic diet
• inhibitory effect of insulin on feeding is enhanced by 10 -8M TNF alpha
• significantly more time spent in REM sleep during the light period
• increased REM sleep results from more REM episodes and shortened periods in between
• more non REM sleep episodes in light period but of shorter duration
• significantly less non REM sleep during dark periods

respiratory system
N
• alveolar fluid clearance unaffected by amilorid and forskolin which both affect clearance in controls
• increased ulceration in 100% oxygen than seen with controls
• reduced lung injury relative to controls after 55 hours at 100% oxygen

immune system
• less susceptibility to dextran sodium sulfate induced colitis
• less severe weight loss, blood loss and macroscopic damage
• improved survival
• elevated osteoclast surface to bone surface in comparison to controls 7 days after bone reloading

hematopoietic system
• elevated osteoclast surface to bone surface in comparison to controls 7 days after bone reloading
• increased platelet deposition

skeleton
• less recovery of lost bone volume due to bone unloading 7 days after reloading
• elevated osteoclast surface to bone surface in comparison to controls 7 days after bone reloading
• lower mineral aposition rate than in controls 7 days after bone reloading

muscle
• increased hyalination and patchy loss of cross-striations when on 100% oxygen

cellular
• decreased numbers of mature oligodendrocytes after cuprizone treatment
• numbers of oligodendrocytes reduced to 50% of controls after 3.5 weeks
• undergo increased apoptosis which is not seen for microglia and astrocytes


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
03/25/2025
MGI 6.24
The Jackson Laboratory