• Neuroscience · Feb 2023

    Essential trace elements prevent the Impairment in the Retention Memory, cerebral cortex, and cerebellum damage in male rats exposed to quaternary metal mixture by up-regulation, of hmox-1 and down-regulation of Nrf2-NOs signaling pathways.

    • IkpeamaEvelyn UtomoiborEUWorld Bank Africa Centre of Excellence in Oilfield Chemicals Research (ACE-CEFOR), University of Port Harcourt, PMB, 5323 Port Harcourt, Choba, Nigeria., Chinna N Orish, Anthonet N Ezejiofor, Joaquim Rovira, Aleksandar Cirovic, Ana Cirovic, Ify L Nwaogazie, and Orish E Orisakwe.
    • World Bank Africa Centre of Excellence in Oilfield Chemicals Research (ACE-CEFOR), University of Port Harcourt, PMB, 5323 Port Harcourt, Choba, Nigeria.
    • Neuroscience. 2023 Feb 21; 512: 708470-84.

    AbstractIn the present study, we examined adverse effects of metals and metalloids in the Cerebral cortex (CC) and Cerebellum (CE). Group 1 comprised from the controls while other four groups of male Wistar rats were treated with following pattern: Group II (Heavy Metal Mixture HMM only: PbCl2, 20 mg·kg-1; CdCl2, 1.61 mg·kg-1; HgCl2, 0.40 mg·kg-1, and NaAsO3,10 mg·kg-1), Groups III (HMM + ZnCl2); Group IV (HMM + Na2SeO3) and Group V (HMM + ZnCl2 + Na2SeO3) for 60 days per os. HMM promoted oxidative stress in the CC and CE of treated rats compared to controls; moreover, exposure to HMM led to increased activity of the AChE and pro-inflammatory cytokines; also, HMM promoted accumulation of caspase 3 and other transcriptional factors such as Nrf2 and decreased levels of Hmox-1. Essential metals reduced increased bioaccumulation of Pb, Cd, As and Hg in CC and CE caused by HMM exposure. Also, all mentioned adverse effects were diminished by essential metals treatment (Se and Zn). HMM exposed rats had considerably less escape dormancy than controls. Histopathological analysis revealed moderate cell loss at the intermediate (Purkinje cell) and granular layer. Zinc and selenium supplementations could reverse adverse effects of heavy metals at various cellular levels in neurons.Copyright © 2023 IBRO. Published by Elsevier Ltd. All rights reserved.

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