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Journal of Neuroinflammation
Published in: Journal of Neuroinflammation 1/2015

Open Access 01-12-2015 | Research

Deferoxamine attenuates lipopolysaccharide-induced neuroinflammation and memory impairment in mice

Authors: Xiao-Ying Zhang, Jiang-Bei Cao, Li-Ming Zhang, Yun-Feng Li, Wei-Dong Mi

Published in: Journal of Neuroinflammation | Issue 1/2015

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Abstract

Background

Neuroinflammation often results in enduring cognitive impairment and is a risk factor for postoperative cognitive dysfunction. There are currently no effective treatments for infection-induced cognitive impairment. Previous studies have shown that the iron chelator deferoxamine (DFO) can increase the resistance of neurons to injury and disease by stimulating adaptive cellular stress responses. However, the impact of DFO on the cognitive sequelae of neuroinflammation is unknown.

Methods

A mouse model of lipopolysaccharide (LPS)-induced cognitive impairment was established to evaluate the neuroprotective effects of DFO against LPS-induced memory deficits and neuroinflammation. Adult C57BL/6 mice were treated with 0.5 μg of DFO 3 days prior to intracerebroventricular microinjection of 2 μg of LPS. Cognitive function was assessed using a Morris water maze from post-injection days 1 to 3. Animal behavioral tests, as well as pathological and biochemical assays were performed to evaluate the LPS-induced hippocampal damage and the neuroprotective effect of DFO.

Results

Treatment of mice with LPS resulted in deficits in cognitive performance in the Morris water maze without changing locomotor activity, which were ameliorated by pretreatment with DFO. DFO prevented LPS-induced microglial activation and elevations of IL-1β and TNF-α levels in the hippocampus. Moreover, DFO attenuated elevated expression of caspase-3, modulated GSK3β activity, and prevented LPS-induced increases of MDA and SOD levels in the hippocampus. DFO also significantly blocked LPS-induced iron accumulation and altered expression of proteins related to iron metabolism in the hippocampus.

Conclusions

Our results suggest that DFO may possess a neuroprotective effect against LPS-induced neuroinflammation and cognitive deficits via mechanisms involving maintenance of less brain iron, prevention of neuroinflammation, and alleviation of oxidative stress and apoptosis.
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Metadata
Title
Deferoxamine attenuates lipopolysaccharide-induced neuroinflammation and memory impairment in mice
Authors
Xiao-Ying Zhang
Jiang-Bei Cao
Li-Ming Zhang
Yun-Feng Li
Wei-Dong Mi
Publication date
01-12-2015
Publisher
BioMed Central
Published in
Journal of Neuroinflammation / Issue 1/2015
Electronic ISSN: 1742-2094
DOI
https://doi.org/10.1186/s12974-015-0238-3

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