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Phenotypes Associated with This Genotype
Genotype
MGI:3850182
Allelic
Composition
Otcspf/Y
Genetic
Background
involves: CD-1
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Otcspf mutation (9 available); any Otc mutation (22 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism
• increase in brain glutamine levels
• increase in serum glutamine levels
(J:784)
• mice develop hyperammonemia (J:2774)
• serum ammonia levels are increased by 58% (J:23195)
• mutants exhibit orotic aciduria that can be treated with various inhibitors such as N-(phosphonoacetyl)-L-aspartate and ornithine but mutants are insensitive to cycloheximide and acivicin
• alterations of cerebral metabolites; increase in ammonia, glutamine, alpha-ketoglutarate levels, glucose, and lactate levels in the brain and a decrease in glutamate content, ATP, pyruvate, and coA-SH levels (J:784)
• mitochondrial NADH/NAD+ ratios are lower than in controls while cytosolic NADH/NAD+ is higher in the brain and liver (J:784)
• increase in ammonia, alpha-ketoglutarate, and lactate levels and decrease in ATP and pyruvate levels in the liver (J:784)
• energy metabolism intermediates in both liver and brain are affected by hyperammonemia and sodium benzoate treatment can correct the energy metabolism abnormalities (J:2774)
(J:2774)
• monoamine oxidase-A activities are decreased by 23% and 16% in cerebellum and brainstem, respectively, while monoamine oxidase-B activities are increased by 22%, 20%, and 22% in cerebellum, brainstem, and cerebral cortex, respectively (J:19848)
• choline acetyltransferase activity is reduced by 63% in cerebral cortex, 53% in thalamus, 36% in striatum, 35% in brainstem and 26% in hippocampus (J:23195)
• acetylcholine esterase activity is reduced by 28% in the thalamus but not other regions (J:23195)
• hepatic ornithine transcarbamylase activity is less than 10% of controls

nervous system
• peripheal-type (mitochondrial) benzodiazepine receptors are increased in density in the brain (J:21306)
• monoamine oxidase-A activities are decreased by 23% and 16% in cerebellum and brainstem, respectively, while monoamine oxidase-B activities are increased by 22%, 20%, and 22% in cerebellum, brainstem, and cerebral cortex, respectively (J:19848)
• brain ammonia levels are increased by 77% (J:23195)
• a decrease in choline acetyltransferase-positive neurons is seen throughout the cerebral cortex, septal area, and diagonal band, indicating a loss of forebrain cholinergic neurons

endocrine/exocrine glands
• peripheal-type (mitochondrial) benzodiazepine receptors are increased in density in the testis

liver/biliary system
• peripheal-type (mitochondrial) benzodiazepine receptors are increased in density in the liver

renal/urinary system
• mutants exhibit orotic aciduria that can be treated with various inhibitors such as N-(phosphonoacetyl)-L-aspartate and ornithine but mutants are insensitive to cycloheximide and acivicin
• peripheal-type (mitochondrial) benzodiazepine receptors are increased in density in the kidney

reproductive system
• peripheal-type (mitochondrial) benzodiazepine receptors are increased in density in the testis

behavior/neurological
• perform poorly in a passive avoidance test, with 6 of 11 mice failing to learn to avoid an electrified grid compared to 1 of 12 in the controls

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
ornithine carbamoyltransferase deficiency DOID:9271 OMIM:311250
J:784 , J:19848 , J:23195


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