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Subcommissural organ-Reissner's fiber complex plasticity in tow animal models of copper intoxication and modulatory effect of curcumin: Involvement of serotonin.
Journal of Chemical Neuroanatomy 2019 Februrary 20
Metal neurotoxicity is a universal health preoccupation. Previous data revealed an obvious neurochemical impairment induced by metal elements as copper. This investigation was conducted to study the subcommissural organ (SCO) response to acute and subchronic Cu exposure as well as its serotoninergic innervation in Wistar rats, and the probable protective potential of curcumin in these toxicological circumstances. By mean of immunohistochemistry using antibodies against Reissner's fiber (RF) and serotonin (5 H T) in acute model (10 mg/kg i.p. for 3 days) and subchronic model (0.125% in drinking water for six weeks), we noted a significant decrease of RF-immunoreactivity and a whole amplified 5-HT innervation of SCO and ventricular borders in intoxicated rats. Co-treatment with curcumin-I (30 mg/kg B.W) has shown a beneficial effect, reinstating both SCO secretory activity and serotoninergic innervation damaged by Cu exposure. This data revealed for the first time an obvious response of SCO-RF complex to Cu intoxication as well as the neuroprotective effect of curcumin-I. Thus, SCO could play a fundamental role in the strategies of brain resistance to neurotoxicity induced by metal elements in rats, and may be used as biomarker to assist in the diagnosis of this neurotoxicological conditions in rodents.
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