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• W3136384952 abstract "Cocaine is a highly addictive drug that mediates its effect through altering dopamine metabolism in the central nervous system (CNS), resulting in a feeling of euphoria. Owing to its high lipophilicity, cocaine easily crosses the blood brain barrier of the CNS and reaches various domains of the brain, where it can trigger cellular damage. Cocaine-induced CNS damage may arise due to increased levels of free radicals and nitric oxide (NO) in immunecompetent astroglial cells. In the present study, the potential ability of cocaine to exacerbate the production of inflammatory products, primarily superoxide free radicals (O2-), hydrogen peroxide (H2O2) and NO/nitrite (NO2-) was examined in rat C6 astroglia-like cells challenged with lipopolysaccharide (LPS), a bacterial endotoxin, and interferon gamma (IFNγ), a pro-inflammatory cytokine. Furthermore, the role of cocaine in increasing the expression of hypoxia inducible factor-1 (HIF-1α) and vascular endothelial growth factor (VEGF) in cells was also determined. First, the viability of the cells was assessed when treated with cocaine (0.5-7 mM) for 24 and 48 h. The results showed that cocaine toxicity was both time and dose-dependent. In subsequent studies, cells were challenged with or without LPS and IFNγ, followed by co-treatment with cocaine (1-4 mM) for 24 h. Cocaine treatment did not increase O2- or H2O2 production in the challenged or unchallenged cells. Similarly, cocaine treatment did not increase NO/NO2- production in the unchallenged cells; however, NO/NO2- levels in the challenged cells was increased 40-50-fold upon cocaine treatment compared with the corresponding unchallenged group. The HIF-1α and VEGF levels were significantly increased in the challenged cells at higher cocaine doses compared with the unchallenged cells. Since high concentrations of NO are associated with inflammation, the high levels of NO production observed in the present study suggested that cocaine may have potentiated the inflammatory response in the challenged C6 astroglia-like cells." @default.
• W3136384952 created "2021-03-29" @default.
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• W3136384952 date "2021-03-16" @default.
• W3136384952 modified "2023-10-16" @default.
• W3136384952 title "Cocaine potentiates an inflammatory response in C6 astroglia‑like cells" @default.
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• W3136384952 doi "https://doi.org/10.3892/br.2021.1421" @default.
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