cardiovascular system
• 80% increase in cardiomyocyte cross-section 10 weeks after tamoxifen treatment
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• heart weight to body weight ratio is increased by 300% 10 weeks after tamoxifen treatment
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• severe cardiac hypertrophy and myopathy, but no fibrosis 10 weeks after tamoxifen treatment
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• reduced fractional shortening with greater left ventricular chamber in diastole 10 weeks after tamoxifen treatment
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• severe cardiac hypertrophy and myopathy, but no fibrosis 10 weeks after tamoxifen treatment
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cellular
• rate of mitochondrial ATP synthesis is decreased by 45% following tamoxifen administration, however, cardiac ventricular performance is not affected and 10 weeks after treatment ATP levels are unchanged
• mitochondrial inorganic phosphate (Pi) uptake is decreased in cardiac mitochondria two weeks after tamoxifen administration
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• mitochondrial hyperproliferation occurs 10 weeks after tamoxifen treatment
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homeostasis/metabolism
• sarcoplasmic reticulum Ca2+ load is increased following tamoxifen administration, however, overall Ca2+ reuptake time is not changed
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muscle
• 80% increase in cardiomyocyte cross-section 10 weeks after tamoxifen treatment
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• reduced fractional shortening with greater left ventricular chamber in diastole 10 weeks after tamoxifen treatment
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• severe cardiac hypertrophy and myopathy, but no fibrosis 10 weeks after tamoxifen treatment
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• sarcomeric disarray with fragmented and disrupted mitochondria 10 weeks after tamoxifen treatment
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nervous system
• swelling of the mitochondrial permeability transition pore (MPTP) as a result of Ca2+ overload is reduced as compared to wild-type in cardiac mitochondria following tamoxifen administration
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growth/size/body
• heart weight to body weight ratio is increased by 300% 10 weeks after tamoxifen treatment
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• severe cardiac hypertrophy and myopathy, but no fibrosis 10 weeks after tamoxifen treatment
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