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First description of enhanced expression of glia maturation factor-beta in experimental toxoplasmic encephalitis.
Journal of International Medical Research 2017 December
Objective We previously showed that Toxoplasma gondii infection induces severe neuropathology in the form of oxidative stress, high nitric oxide production, glial activation, and apoptosis. This study examined the association between glia maturation factor-beta (GMF-β) expression, activated astrocytes/microglia, and neuropathology in toxoplasmic encephalitis (TE). Methods Mouse brain GMF expression was examined by immunohistochemistry on days 10 and 30 post- T. gondii infection. Results Neuropathology of infected mice was associated with increased GMF expression in reactive glial cells and neurons compared with healthy controls. Specific up-regulation of GMF-β expression in glial cells was associated with increased gliosis in TE. Conclusions GMF up-regulation in glial cells causes neuronal destruction, suggesting a TE pathological pathway involving GMF-mediated brain cell cytotoxicity. GMF-β may therefore be a good biomarker for disease risk assessment and to estimate host neuropathy after exposure to T. gondii, as well as providing a new therapeutic target. This is the first study to demonstrate the expression of GMF-β in reactive glial cells and its association with neuropathology in TE.
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