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Phenotypes Associated with This Genotype
Genotype
MGI:5905050
Allelic
Composition
Tg(Myh6-Gnaq*Q209L)44Ejne/Tg(Myh6-Gnaq*Q209L)44Ejne
Genetic
Background
involves: FVB
Find Mice Using the International Mouse Strain Resource (IMSR)
No mouse lines available in IMSR.
See publication links below for author information.
phenotype observed in females
phenotype observed in males
N normal phenotype
homeostasis/metabolism
• left atria often contains thombi

mortality/aging
• mice die prematurely at 12-14 months of age

cardiovascular system
• enlarged cardiac myocytes contain big hyperchromatic nuclei, intracellular vacuolization, and interstitial fibrosis
• the right atrial weight is elevated by 12 months of age
• the left atria is enlarged by 12 months of age and left atrial diameter is increased by about 50%
• the ventricular weight/body weight ratio is increased
• a group of 12-14 month old mice exhibit dilated ventricles and increased ventricle weight
• a group of 12-14 month old mice exhibit dilated ventricles and increased ventricle weight while a subset of mice at this age do not show increased ventricular mass and dilation
• enlarged cardiac myocytes exhibit interstitial fibrosis
• the 4 chambers of 12.5 month old hearts are enlarged
• age of onset of dilated cardiomyopathy ranges between 11 and 13 months of age and the phenotype progresses to end-stage dilation with a concomitant reduction in fractional shortening within 2-3 months
• however, left ventricular wall thickness remains unchanged indicating no initial hypertrophic response
• decrease in systolic contractile function, with a reduction in fractional shortening below 15%
• M-mode and echocardiography show increases in left ventricular end-systolic and end-diastolic diameters at 12-14 months of age
• heart rates are slower in anaesthetized mice and in conscious mice during blood pressure recordings
• mice show signs of left and right heart failure at end-stage

muscle
• enlarged cardiac myocytes contain big hyperchromatic nuclei, intracellular vacuolization, and interstitial fibrosis
• the 4 chambers of 12.5 month old hearts are enlarged
• age of onset of dilated cardiomyopathy ranges between 11 and 13 months of age and the phenotype progresses to end-stage dilation with a concomitant reduction in fractional shortening within 2-3 months
• however, left ventricular wall thickness remains unchanged indicating no initial hypertrophic response
• decrease in systolic contractile function, with a reduction in fractional shortening below 15%

cellular
• enlarged cardiac myocytes exhibit interstitial fibrosis

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
dilated cardiomyopathy DOID:12930 OMIM:PS115200
J:127756


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
11/12/2024
MGI 6.24
The Jackson Laboratory