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Article Dans Une Revue Biochemical and Biophysical Research Communications Année : 2016

Increased fatty acid synthesis inhibits nitrogen starvation-induced autophagy in lipid droplet-deficient yeast

Résumé

Macroautophagy is a degradative pathway whereby cells encapsulate and degrade cytoplasmic material within endogenously-built membranes. Previous studies have suggested that autophagosome membranes originate from lipid droplets. However, it was recently shown that rapamycin could induce autophagy in cells lacking these organelles. Here we show that lipid droplet-deprived cells are unable to perform autophagy in response to nitrogen-starvation because of an accelerated lipid synthesis that is not observed with rapamycin. Using cerulenin, a potent inhibitor of fatty acid synthase, and exogenous addition of palmitic acid we could restore nitrogen-starvation induced autophagy in the absence of lipid droplets.
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Dates et versions

hal-01330351 , version 1 (22-01-2024)

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Matthieu Régnacq, Pierre Voisin, Yves y Sere, Bin Wan, Venty M S Soeroso, et al.. Increased fatty acid synthesis inhibits nitrogen starvation-induced autophagy in lipid droplet-deficient yeast. Biochemical and Biophysical Research Communications, 2016, 477 (1), pp.33-39. ⟨10.1016/j.bbrc.2016.06.017⟩. ⟨hal-01330351⟩
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