Local Administrations of Iron Oxide Nanoparticles in the Prefrontal Cortex and Caudate Putamen of Rats Do Not Compromise Working Memory and Motor Activity.

Autor: Irrsack E; Department of Neuropharmacology, Centre for Cognitive Sciences, University of Bremen, PO Box 330440, Bremen, 28334, Germany. e.irrsack@uni-bremen.de., Aydin S; Department of Neuropharmacology, Centre for Cognitive Sciences, University of Bremen, PO Box 330440, Bremen, 28334, Germany., Bleckmann K; Department of Neuropharmacology, Centre for Cognitive Sciences, University of Bremen, PO Box 330440, Bremen, 28334, Germany., Schuller J; Department of Neuropharmacology, Centre for Cognitive Sciences, University of Bremen, PO Box 330440, Bremen, 28334, Germany., Dringen R; Centre for Biomolecular Interactions Bremen (CBIB), and Centre for Environmental Research and Sustainable, Technology, University of Bremen, PO Box 330440, Bremen, 28334, Germany., Koch M; Department of Neuropharmacology, Centre for Cognitive Sciences, University of Bremen, PO Box 330440, Bremen, 28334, Germany.
Jazyk: angličtina
Zdroj: Neurotoxicity research [Neurotox Res] 2023 Dec 22; Vol. 42 (1), pp. 6. Date of Electronic Publication: 2023 Dec 22.
DOI: 10.1007/s12640-023-00684-x
Abstrakt: Iron oxide nanoparticles (IONPs) have come into focus for their use in medical applications although possible health risks for humans, especially in terms of brain functions, have not yet been fully clarified. The present study investigates the effects of IONPs on neurobehavioural functions in rats. For this purpose, we infused dimercaptosuccinic acid-coated IONPs into the medial prefrontal cortex (mPFC) and caudate putamen (CPu). Saline (VEH) and ferric ammonium citrate (FAC) were administered as controls. One- and 4-week post-surgery mPFC-infused animals were tested for their working memory performance in the delayed alternation T-maze task and in the open field (OF) for motor activity, and CPu-infused rats were tested for their motor activity in the OF. After completion of the experiments, the brains were examined histologically and immunohistochemically. We did not observe any behavioural or structural abnormalities in the rats after administration of IONPs in the mPFC and the CPu. In contrast, administration of FAC into the CPu resulted in decreased motor activity and increased the number of microglia in the mPFC. Perls' Prussian blue staining revealed that FAC- and IONP-treated rats had more iron-containing ramified cells than VEH-treated rats, indicating iron uptake by microglia. Our results demonstrate that local infusions of IONPs into selected brain regions have no adverse impact on locomotor behaviour and working memory.
(© 2023. The Author(s).)
Databáze: MEDLINE
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