cellular
• mitochondria in 12 week old mutant hearts are more disorganized and often found in large clusters with many small, round mitochondria
• following myocardial infarction, mitochondria in myocytes in the border zone are swollen and show severe cristae remodeling
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• mitochondria in the heart are smaller but have normal respiratory capacity
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• myocytes treated with rotenone, a mitochondrial complex I inhibitor, do not show an increase in autophagy as in wild-type myocytes
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• following myocardial infarction, mitophagy is impaired in the border zone of the infarct, but not in remote zones
• myocytes treated with rotenone, a mitochondrial complex I inhibitor, do not show an increase in mitophagy as in wild-type myocytes
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• isolated myocytes are more susceptible to hypoxia-induced cell death
(J:193741)
• in MPP+ treated mouse embryonic fibroblasts
(J:194987)
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• mitochondria isolated from the border zones and subjected to 4 hours of myocardial infarction, have lower oxygen consumption rates than mitochondria from remote zones
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cardiovascular system
• mutants exhibit increased sensitivity to myocardial infarction, with about 60% mortality within the first week compared to about 20% for wild-type mice and show severe thinning of left ventricular wall, enlarged left ventricle interior dimensions, and increased remodeling compared to wild-type
• 7 days following myocardial infarction, surviving mutants exhibit lower fractional shortening and ejection fractions, increased left ventricular end diastolic and systolic dimensions, and increased left ventricular volume, indicating impaired recovery after infarction
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growth/size/body
homeostasis/metabolism
• mutants exhibit increased sensitivity to myocardial infarction, with about 60% mortality within the first week compared to about 20% for wild-type mice and show severe thinning of left ventricular wall, enlarged left ventricle interior dimensions, and increased remodeling compared to wild-type
• 7 days following myocardial infarction, surviving mutants exhibit lower fractional shortening and ejection fractions, increased left ventricular end diastolic and systolic dimensions, and increased left ventricular volume, indicating impaired recovery after infarction
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• myocytes treated with rotenone, a mitochondrial complex I inhibitor, do not show an increase in autophagy as in wild-type myocytes
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• following myocardial infarction, mitophagy is impaired in the border zone of the infarct, but not in remote zones
• myocytes treated with rotenone, a mitochondrial complex I inhibitor, do not show an increase in mitophagy as in wild-type myocytes
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mortality/aging
• mutants exhibit increased sensitivity to myocardial infarction, with about 60% mortality within the first week compared to about 20% for wild-type mice
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behavior/neurological
• trained mutant mice remain on rotarod longer than trained wild type at 5, 10, and 15 rpm, but 20 rpm and spend less time "distracted" while on the rod
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