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Vol 55(2021) N 4 p. 624-636; DOI 10.1134/S0026893321030146 Full Text

K.S. Vishnyakova1, K.V. Popov1, X. Pan1, M.V. Jasko1, Y.E. Yegorov1*

Long-Chain Free Fatty Acids Influence Lipid Accumulation, Lysosome Activation and Glycolytic Shift in Various Cells In Vitro

1Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991 Russia

*yegorov58@gmail.com
Received - 2020-12-08; Revised - 2021-01-18; Accepted - 2021-01-21

Hydrophobic molecules may be toxic when present in excess. When dissolved in membranes, hydrophobic molecules disrupt membrane function. Studies on the effects of free fatty acids (FFA) on cultured cells contradict each other. Here we describe the effects of FFA on various human cells in culture. The addition of long-chain FFA (oleic, palmitic, linoleic, linolenic, etc.) to cultured cells led to lipid accumulation in hepatocytes and muscle cells, initiation of autophagy, and uncoupling of oxidative phosphorylation. Although treated cells increase their oxygen consumption, metabolic shifts in favor of glycolysis were observed. All these effects were expressed to varying degrees in different cells and with the addition of different FFAs. The mechanisms of these FFA effects are discussed, as well their practical implications.

free fatty acids, metabolic reprogramming, cell culture, glycolysis, respiration, uncoupling



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