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Phenotypes Associated with This Genotype
Genotype
MGI:8286541
Allelic
Composition
Echs1em1Lutzy/Echs1em3Lutzy
Genetic
Background
C57BL/6J-Echs1em1Lutzy/Echs1em3Lutzy
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Echs1em1Lutzy mutation (0 available); any Echs1 mutation (25 available)
Echs1em3Lutzy mutation (0 available); any Echs1 mutation (25 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• A third of compound heterozygotes die after being injected with a dose of LPS that 100% of wildtype controls survive, and the surviving mutants have delayed weight recovery and failure to thrive

behavior/neurological
• increased active awake state, normal awake inactive state, and decreased slow wave sleep
• although no differences are found in sensory gating during pre-pulse inhibition using auditory stimuli, there is increased latency to withdraw the foot from the hotplate
• EEG traces show increased epileptiform discharges
• Although spontaneous seizures are not observed, compound heterozygotes have increased pentylenetetrazol-induced seizure numbers and severity and this in increased with a 3% increase in dietary valine

cellular
• normal brain development and no degeneration seen at 18 months of age compared with wildtype, but twice as many microglia are found in the striatum
• exercise fatigue with elevated post-exercise lactate levels, and abnormal levels of various amino acids, both branched-chain and non-branched chain, in the liver at 3 months

nervous system
• EEG traces show increased epileptiform discharges
• Although spontaneous seizures are not observed, compound heterozygotes have increased pentylenetetrazol-induced seizure numbers and severity and this in increased with a 3% increase in dietary valine
• normal brain development and no degeneration seen at 18 months of age compared with wildtype, but twice as many microglia are found in the striatum
• normal brain development and no degeneration seen at 18 months of age compared with wildtype, but twice as many microglia are found in the striatum
• increased as measured by EEG at approximately 3.5 month of age
• increased as measured by EEG at approximately 3.5 month of age

hematopoietic system
• normal brain development and no degeneration seen at 18 months of age compared with wildtype, but twice as many microglia are found in the striatum

homeostasis/metabolism
• Assessment of liver amino acid content at 3 months of age found only a slight elevation in branched chain amino acids, but a significant elevation in approximately 60% of non-branched chain amino acids
• no differences in anxiety or fear conditioning, but compound heterozygotes display a progressive reduction in latency to fall from a rotarod by the eighth trial, attributed to exercise fatigue, with shortened run distance and higher than normal post-exercise lactate levels
• A third of compound heterozygotes die after being injected with a dose of LPS that 100% of wildtype controls survive, and the surviving mutants have delayed weight recovery and failure to thrive

immune system
• normal brain development and no degeneration seen at 18 months of age compared with wildtype, but twice as many microglia are found in the striatum


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
01/20/2026
MGI 6.24
The Jackson Laboratory