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Phenotypes Associated with This Genotype
involves: 129P2/OlaHsd * C57BL/6J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Cacna1atm1Maag mutation (0 available); any Cacna1a mutation (42 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
nervous system
• a decrease in the threshold for induction and an increase in propagation velocity of cortical spreading depression (a wave of transient intense spike activity followed by long-lasting neuronal suppression that crosses the cortex)
• mutants are viable, fertile, and display no overt phenotype unlike Cacna1a null mutants
• increased neurotransmission at the neuromuscular junction under specific conditions
• miniature endplate potential (spontaneous postsynaptic depolarization resulting from uniquantal acetylcholine release) frequency is increased
• mutant Cav2.1 channels activate at lower voltages and open more readily than wild-type channels
• the density of functional Cav2.1 channels in mutants is unaffected
• other Ca2+ channels are unaffected
• at the neuromuscular junction acetylcholine release when the concentration of Ca2+ is below saturation concentrations is significantly increased

Mouse Models of Human Disease
OMIM ID Ref(s)
Migraine, Familial Hemiplegic, 1; FHM1 141500 J:88693

Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Tumor Biology (MTB), Gene Ontology (GO), MouseCyc
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last database update
MGI 6.01
The Jackson Laboratory