Influence of LPS-induced neuroinflammation on acetylcholinesterase activity in rat brain

In the present study, neuroinflammation was induced by bilateral intracerebroventricular (ICV) administration of Lipopolysaccharide (LPS). Proinflammatory cytokines (TNF-alpha and IL-1 beta), acetylcholinesterase (AChE) activity, 'malondialdehyde (MDA) and reduced glutathione (GSH) were studied as markers for neuroinflammation, cholinergic activity and oxidative stress respectively in different brain regions at different time points after LIPS injection. LPS produced increase in proinflammatory cytokines, MDA and the decrease in level of GSH it 24 h indicating a state of inflammation in brain regions, which was significantly blocked by lbuprofen, a non steroidal anti-inflammatory drug. Enhanced AChE activity with these inflammatory markers after LPS administration indicates a possible relationship between neuroinflammation and cholinergic system during the development of neurodegenerative diseases. (C) 2008 Elsevier B.V. All rights reserved.