Abstract
Tartrazine is a synthetic lemon yellow azo dye primarily used as a food coloring. The present study aimed to screen the neurobiochemical effects of Tartrazine in Wistar rats after administering the Acceptable Daily Intake (ADI) level. Tartrazine (7.5 mg/kg b.w.) was administered to 21 day old weanling rats through oral gavage once daily for 40 consecutive days. On 41st day, the animals were sacrificed and brain sub regions namely, frontal cortex, corpus striatum, hippocampus and cerebellum were used to determine activities of anti-oxidant enzymes viz. Superoxide Dismutase (SOD), Catalase (CAT), Glutathione-Stransferase (GST), Glutathione Reductase (GR) and Glutathione Peroxidase (GPx) and levels of lipid peroxides using Thio-barbituric Acid Reactive Substance (TBARS) assay. Our investigation showed a significant decrease in SOD and CAT activity, whereas there occurred a decline in GST and GR activity with an increase in GPx activity to counteract the oxidative damage caused by significantly increased levels of lipid peroxides. The possible mechanism of this oxidative damage might be attributed to the production of sulphanilc acid as a metabolite in azofission of tartrazine. It may be concluded that the ADI levels of food azo dyes adversely affect and alter biochemical markers of brain tissue and cause oxidative damage.
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