title: The interplay between apoptosis, mitophagy and mitochondrial biogenesis induced by resveratrol can determine activated hepatic stellate cells death or survival.
abstract: Resveratrol has been the focus of numerous studies reporting opposite effects that depend on its concentration. The GRX is an activated hepatic stellate cells model used to study liver fibrosis development and resolution. We recently showed that GRX treatment with RSV (0.1-50 µM) for 24 h triggered dose-dependent pro-oxidant effects, resulting in cytotoxicity and cell damage only at the highest concentration. Here, we evaluated whether the pro-oxidant effect of resveratrol treatment is accompanied by alterations on the GRX mitochondrial metabolism, and whether the concomitantly autophagy/mitophagy induction can influence on cell death or survival. We demonstrated that all concentrations of resveratrol promoted an increase of GRX cell death signals, altering the mitochondrial dynamics and function. Cells treated with all resveratrol concentrations presented higher autophagy/mitophagy features, but only treatments with 1 and 10 µM of resveratrol-induced mitochondrial biogenesis. Since cell damage was higher and there was no mitochondrial biogenesis in GRX treated with 50 µM of resveratrol, we suggest that these cells failed to remove and replace all damaged mitochondria. In conclusion, the cytotoxic effect of resveratrol that effectively promotes cell death could be related to the interrelation between the concomitant induction of apoptosis, autophagy/mitophagy and mitochondrial biogenesis in GRX.
authors.affiliation: Department of Biochemistry, ICBS, Federal University of Rio Grande do Sul (UFRGS), rua Ramiro Barcelos, 2600-Anexo I, Porto Alegre, RS, CEP 90035-003, Brazil, leo.meira@ufrgs.br.
authors.forename: Leo A
authors.initials: LA
authors.lastname: Meira Martins
authors.forename: Moema Queiroz
authors.initials: MQ
authors.lastname: Vieira
authors.forename: Mariana
authors.initials: M
authors.lastname: Ilha
authors.forename: Mariana
authors.initials: M
authors.lastname: de Vasconcelos
authors.forename: Henrique B
authors.initials: HB
authors.lastname: Biehl
authors.forename: Daniela B
authors.initials: DB
authors.lastname: Lima
authors.forename: Vanessa
authors.initials: V
authors.lastname: Schein
authors.forename: Florencia
authors.initials: F
authors.lastname: Barbé-Tuana
authors.forename: Radovan
authors.initials: R
authors.lastname: Borojevic
authors.forename: Fátima Costa Rodrigues
authors.initials: FC
authors.lastname: Guma
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D017209:Apoptosis; D002460:Cell Line; D055166:Hepatic Stellate Cells / Q000187:drug effects / Q000378:metabolism*; D051379:Mice; D063306:Mitophagy; D001678:Organelle Biogenesis; D000077185:Resveratrol; D013267:Stilbenes / Q000494:pharmacology*
chemical_list: D000975:Antioxidants; D013267:Stilbenes; D000077185:Resveratrol