Decreased infarct size after focal cerebral ischemia in mice chronically infected with Toxoplasma gondii

Arsenijevic, D; de Bilbao, F; Vallet, P; Hemphill, A; Gottstein, B; Richard, D; Giannakopoulos, P; Langhans, W (2007). Decreased infarct size after focal cerebral ischemia in mice chronically infected with Toxoplasma gondii. Neuroscience, 150(3), pp. 537-46. Oxford: Elsevier 10.1016/j.neuroscience.2007.09.080

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To determine whether Toxoplasma gondii infection could modify biological phenomena associated with brain ischemia, we investigated the effect of permanent middle cerebral artery occlusion (MCAO) on neuronal survival, inflammation and redox state in chronically infected mice. Infected animals showed a 40% to 50% decrease of infarct size compared with non-infected littermates 1, 4 and 14 days after MCAO. The resistance of infected mice may be associated with increased basal levels of anti-inflammatory cytokines and/or a marked reduction of the MCAO-related brain induction of two pro-inflammatory cytokines, tumor necrosis factor-alpha and interferon-gamma (IFNgamma). In addition, potential anti-inflammatory/neuroprotective factors such as nerve growth factor, suppressor of cytokine signaling-3, superoxide dismutase activity, uncoupling protein-2 and glutathione (GSH) were upregulated in the brain of infected mice. Consistent with a role of GSH in central cytokine regulation, GSH depletion by diethyl maleate inhibited Toxoplasma gondii lesion resistance by increasing the proinflammatory cytokine IFNgamma brain levels. Overall, these findings indicate that chronic toxoplasmosis decisively influences both the inflammatory molecular events and outcome of cerebral ischemia.

Item Type:

Journal Article (Original Article)


05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Institute of Parasitology

UniBE Contributor:

Hemphill, Andrew and Gottstein, Bruno








Factscience Import

Date Deposited:

04 Oct 2013 14:53

Last Modified:

21 Jan 2014 15:05

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URI: (FactScience: 36356)

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