title: Resveratrol increases glutamate uptake and glutamine synthetase activity in C6 glioma cells.
abstract: Resveratrol, a phytoalexin found mainly in grapes, is a promising natural product with anti-cancer and cardio-protective activities. Here, we investigated, in C6 glioma cells, the effect of resveratrol on some specific parameters of astrocyte activity (glutamate uptake, glutamine synthetase and secretion of S100B, a neurotrophic cytokine) commonly associated with the protective role of these cells. Cell proliferation was significantly decreased by 8% and 26%, following 24h of treatment with 100 and 250 microM resveratrol. Extracellular S100B increased after 48 h of resveratrol exposure. Short-term resveratrol exposure (from 1 to 100 microM) induced a linear increase in glutamate uptake (up to 50% at 100 microM resveratrol) and in glutamine synthetase activity. Changes in these glial activities can contribute to the protective role of astrocytes in brain injury conditions, reinforcing the putative use of this compound in the therapeutic arsenal against neurodegenerative diseases and ischemic disorders.
authors.affiliation: Universidade Federal do Rio Grande do Sul, Instituto de Ciências Básicas da Saúde, Departamento de Bioquímica, Rua Ramiro Barcelos 2600 anexo, 90035-003 Porto Alegre, RS, Brazil.
authors.forename: André Quincozes
authors.initials: AQ
authors.lastname: dos Santos
authors.forename: Patrícia
authors.initials: P
authors.lastname: Nardin
authors.forename: Cláudia
authors.initials: C
authors.lastname: Funchal
authors.forename: Lucia Maria Vieira
authors.initials: LM
authors.lastname: de Almeida
authors.forename: Maria Caroline
authors.initials: MC
authors.lastname: Jacques-Silva
authors.forename: Susana T
authors.initials: ST
authors.lastname: Wofchuk
authors.forename: Carlos-Alberto
authors.initials: CA
authors.lastname: Gonçalves
authors.forename: Carmem
authors.initials: C
authors.lastname: Gottfried
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004789:Enzyme Activation / Q000187:drug effects; D005910:Glioma / Q000378:metabolism* / Q000473:pathology*; D005974:Glutamate-Ammonia Ligase / Q000378:metabolism*; D018698:Glutamic Acid / Q000493:pharmacokinetics*; D051381:Rats; D000077185:Resveratrol; D013267:Stilbenes / Q000008:administration & dosage*
chemical_list: D013267:Stilbenes; D018698:Glutamic Acid; D005974:Glutamate-Ammonia Ligase; D000077185:Resveratrol