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• W2285133729 endingPage "78" @default.
• W2285133729 startingPage "663" @default.
• W2285133729 abstract "Lipid droplets have long been recognized by light microscopy to accumulate in hypoxic cells both in vivo and in vitro. In the present tissue culture experiments, correlative electron microscopic observations and lipid analyses were performed to determine the nature and significance of lipid accumulation in hypoxia. Strain L mouse fibroblasts were grown in suspension culture, both aerobically and under severe oxygen restriction obtained by gassing cultures daily with an 8% CO(2)-92% nitrogen mixture. After 48 hours, hypoxic cells showed an increase in total lipid/protein ratio of 42% over control cells. Most of this increase was accounted for by an elevation in the level of cellular triglyceride from 12.3 +/- 0.9 mug/mg cell protein in aerobic cultures to 41.9 +/- 0.7 in the hypoxic cultures, an increase of 240%. Levels of cellular free fatty acids (FFA) were 96% higher in the hypoxic cultures. No significant changes in the levels of cellular phospholipid or cholesterol were noted. Electron microscopic examination revealed the accumulation of homogeneous cytoplasmic droplets. The hypoxic changes were reversible upon transferring the cultures to aerobic atmospheres with disappearance of the lipid. These experiments indicate that hypoxic injury initially results in triglyceride and FFA accumulation from an inability to oxidize fatty acids taken up from the media and not from autophagic processes, as described in other types of cell injury associated with the sequestration of membranous residues and intracellular cholesterol and phospholipid accumulation." @default.
• W2285133729 created "2016-06-24" @default.
• W2285133729 creator A5005326496 @default.
• W2285133729 creator A5027288307 @default.
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• W2285133729 date "1977-09-01" @default.
• W2285133729 modified "2023-09-23" @default.
• W2285133729 title "Lipid accumulation of hypoxic tissue culture cells." @default.
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• W2285133729 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2032384" @default.
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• W2285133729 hasPublicationYear "1977" @default.
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