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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Tg(Myh6-TNNI3*G203S)1Chs
transgene insertion 1, Christopher Semsarian
MGI:3690009
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
cx1
Myh6tm1Jse/Myh6+
Tg(Myh6-TNNI3*G203S)1Chs/0
involves: 129X1/SvJ * C57BL/6 MGI:5907166
tg2
Tg(Myh6-TNNI3*G203S)1Chs/0 Not Specified MGI:3690017


Genotype
MGI:5907166
cx1
Allelic
Composition
Myh6tm1Jse/Myh6+
Tg(Myh6-TNNI3*G203S)1Chs/0
Genetic
Background
involves: 129X1/SvJ * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Myh6tm1Jse mutation (2 available); any Myh6 mutation (206 available)
Tg(Myh6-TNNI3*G203S)1Chs mutation (0 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• 100% mortality by 21 days of age, with survival declining rapidly from 16 days of age
• mean life span of males is 16.8 days, while the mean life span of females is 18.3 days

cardiovascular system
• abnormal myofiber alignment
• altered alignment of myofibrils, myocyte atrophy and fragmentation, altered distribution of mitochondria between myofibrils, myofibril disarray and discontinuity, degeneration and loss of myocyte structure, collagen accumulation, greater infiltration of other cells, and enlarged extracellular spaces
• cardiomyocyte hypertrophy
• degeneration and loss of cardiac myocyte structure
• areas of necrosis in left ventricular myocardium
• increase in heart weight to body weight ratio at 14 and 16 days of age
• 4-chamber cardiac enlargement at 14 days of age
• biatrial dilatation
• mice develop severe dilated cardiomyopathy, with enlargement of left ventricular cardiac chambers and a reduction in fractional shortening
• reduction in cardiac function at 16 to 18 days of age, with decreased fractional shortening which is reduced to below 20% in some mice
• increase in left ventricular end-diastolic and end-systolic diameter
• at 14 days of age
• adrenaline administration induces ventricular arrhythmias in some mice
• first degree atrioventricular block
• at 14 days of age
• increase in P-wave height
• the corrected QT interval is increased

immune system

liver/biliary system

homeostasis/metabolism
• premorbid left atrial thrombus is seen in a subgroup of hearts

muscle
• abnormal myofiber alignment
• altered alignment of myofibrils, myocyte atrophy and fragmentation, altered distribution of mitochondria between myofibrils, myofibril disarray and discontinuity, degeneration and loss of myocyte structure, collagen accumulation, greater infiltration of other cells, and enlarged extracellular spaces
• cardiomyocyte hypertrophy
• degeneration and loss of cardiac myocyte structure
• areas of necrosis in left ventricular myocardium
• mice develop severe dilated cardiomyopathy, with enlargement of left ventricular cardiac chambers and a reduction in fractional shortening
• reduction in cardiac function at 16 to 18 days of age, with decreased fractional shortening which is reduced to below 20% in some mice

respiratory system
• ratio of lung weight to body weight is increased

growth/size/body
• increase in heart weight to body weight ratio at 14 and 16 days of age
• ratio of lung weight to body weight is increased

cellular

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
hypertrophic cardiomyopathy DOID:11984 J:153302




Genotype
MGI:3690017
tg2
Allelic
Composition
Tg(Myh6-TNNI3*G203S)1Chs/0
Genetic
Background
Not Specified
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
cardiovascular system
• exhibit myofiber disarray in hearts
• markers of hypertrophy are elevated
• exhibit prolongation of the PR interval by 30 weeks of age, consistent with first-degree atrioventricular block
• exhibit decreased QRS and QRS-H
• cardiomyocytes exhibit abnormal calcium cycling with a prolonged decay constant in calcium transients and a reduced decay constant in response to caffeine treatment, however show normal sarcoplasmic reticulum calcium release and storage
• develop hallmarks of familial hypertrophic cardiomyopathy by 50 weeks of age

muscle
• exhibit myofiber disarray in hearts
• develop hallmarks of familial hypertrophic cardiomyopathy by 50 weeks of age

growth/size/body
• markers of hypertrophy are elevated

cellular

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
hypertrophic cardiomyopathy 7 DOID:0110313 OMIM:613690
J:114537





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last database update
08/02/2024
MGI 6.24
The Jackson Laboratory