Curcumin treatment protects rat retinal neurons against excitotoxicity. - GreenMedInfo Summary
Curcumin treatment protects rat retinal neurons against excitotoxicity: effect on N-methyl-D: -aspartate-induced intracellular Ca(2+) increase.
Exp Brain Res. 2005 Dec;167(4):641-8. Epub 2005 Aug 3. PMID: 16078027
Department of Cell Biology and Neuroscience, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Roma, Italy.
Curcumin, an extract from the plant Curcuma longa with well-known antioxidant and anti-inflammatory activities, was tested as protective agent against excitotoxicity in rat retinal cultures. A 24 h-treatment with curcumin reduced N-methyl-D: -aspartate (NMDA)-mediated excitotoxic cell damage, estimated as decrease of cell viability and increase in apoptosis. The protection was associated with decrease of NMDA receptor-mediated Ca(2+) rise and reduction in the level of phosphorylated NR1 subunit of the NMDA receptor. These results enlighten a new pharmacological action of the plant extract, possibly mediated by a modulation of NMDA receptor activity.