Nanoscale‐alumina induced cognitive dysfunction in mice related to hippocampal structural changes: A stereological study

Background Aluminum (Al) is known to induce neurotoxicity in both humans and rodents. Recent evidence has indicated that the toxicity of Al Oxide (Al2O3) Nanoparticles (Al‐NP), one of the most abundantly used engineered nanoparticles, is far greater than that of Al itself. To date, however, no infor...

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Veröffentlicht in:Alzheimer's & dementia 2023-06, Vol.19 (S1), p.n/a
Hauptverfasser: Naseh, Maryam, Esmaili, Zahra, Karimi, Fatemeh, Moosavi, Maryam
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Esmaili, Zahra
Karimi, Fatemeh
Moosavi, Maryam
description Background Aluminum (Al) is known to induce neurotoxicity in both humans and rodents. Recent evidence has indicated that the toxicity of Al Oxide (Al2O3) Nanoparticles (Al‐NP), one of the most abundantly used engineered nanoparticles, is far greater than that of Al itself. To date, however, no information is available regarding the effect of Al‐NP on the stereological parameters of hippocampus. In particular, no stereological studies have evaluated the effect of Al‐NP on hippocampal CA1, dentate gyrus volume, and number of pyramidal and granular cells. Method Adult male NMRI mice were treated with AlNP in dose 10 mg/kg/oral gavage for 5 days. The test session of novel object recognition (NOR) task was performed on day 5. Following the NOR test, the hippocampi were analyzed for stereological and apoptotic. Result The results demonstrated that the five‐day Al‐NP ingestion elicited a reduced preference to explore a novel object in the novel object recognition test (a hippocampal‐dependent task). Perhaps contributing to this memory deficit, Al‐NP induced additional alterations in the hippocampus of male NMRI mice in terms of (1) hippocampal volume (decreased the volume of the whole hippocampus, CA1, and dentate gyrus regions), (2) cell number (decreased the number of CA1 pyramidal neurons and dentate gyrus granular cells), and (3) increased cleaved caspase‐3 in the whole hippocampus. Conclusion These results provided new mechanistic insight to understand the impairing effect of AL‐NP on the hippocampal function and structure.
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Recent evidence has indicated that the toxicity of Al Oxide (Al2O3) Nanoparticles (Al‐NP), one of the most abundantly used engineered nanoparticles, is far greater than that of Al itself. To date, however, no information is available regarding the effect of Al‐NP on the stereological parameters of hippocampus. In particular, no stereological studies have evaluated the effect of Al‐NP on hippocampal CA1, dentate gyrus volume, and number of pyramidal and granular cells. Method Adult male NMRI mice were treated with AlNP in dose 10 mg/kg/oral gavage for 5 days. The test session of novel object recognition (NOR) task was performed on day 5. Following the NOR test, the hippocampi were analyzed for stereological and apoptotic. Result The results demonstrated that the five‐day Al‐NP ingestion elicited a reduced preference to explore a novel object in the novel object recognition test (a hippocampal‐dependent task). Perhaps contributing to this memory deficit, Al‐NP induced additional alterations in the hippocampus of male NMRI mice in terms of (1) hippocampal volume (decreased the volume of the whole hippocampus, CA1, and dentate gyrus regions), (2) cell number (decreased the number of CA1 pyramidal neurons and dentate gyrus granular cells), and (3) increased cleaved caspase‐3 in the whole hippocampus. Conclusion These results provided new mechanistic insight to understand the impairing effect of AL‐NP on the hippocampal function and structure.</description><identifier>ISSN: 1552-5260</identifier><identifier>EISSN: 1552-5279</identifier><identifier>DOI: 10.1002/alz.059850</identifier><language>eng</language><ispartof>Alzheimer's &amp; dementia, 2023-06, Vol.19 (S1), p.n/a</ispartof><rights>2023 the Alzheimer's Association.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Falz.059850$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Falz.059850$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,27903,27904,45553,45554</link.rule.ids></links><search><creatorcontrib>Naseh, Maryam</creatorcontrib><creatorcontrib>Esmaili, Zahra</creatorcontrib><creatorcontrib>Karimi, Fatemeh</creatorcontrib><creatorcontrib>Moosavi, Maryam</creatorcontrib><title>Nanoscale‐alumina induced cognitive dysfunction in mice related to hippocampal structural changes: A stereological study</title><title>Alzheimer's &amp; dementia</title><description>Background Aluminum (Al) is known to induce neurotoxicity in both humans and rodents. Recent evidence has indicated that the toxicity of Al Oxide (Al2O3) Nanoparticles (Al‐NP), one of the most abundantly used engineered nanoparticles, is far greater than that of Al itself. To date, however, no information is available regarding the effect of Al‐NP on the stereological parameters of hippocampus. In particular, no stereological studies have evaluated the effect of Al‐NP on hippocampal CA1, dentate gyrus volume, and number of pyramidal and granular cells. Method Adult male NMRI mice were treated with AlNP in dose 10 mg/kg/oral gavage for 5 days. The test session of novel object recognition (NOR) task was performed on day 5. Following the NOR test, the hippocampi were analyzed for stereological and apoptotic. Result The results demonstrated that the five‐day Al‐NP ingestion elicited a reduced preference to explore a novel object in the novel object recognition test (a hippocampal‐dependent task). Perhaps contributing to this memory deficit, Al‐NP induced additional alterations in the hippocampus of male NMRI mice in terms of (1) hippocampal volume (decreased the volume of the whole hippocampus, CA1, and dentate gyrus regions), (2) cell number (decreased the number of CA1 pyramidal neurons and dentate gyrus granular cells), and (3) increased cleaved caspase‐3 in the whole hippocampus. 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