Exp Neurobiol 2009; 18(2): 123-128
Published online December 31, 2009
© The Korean Society for Brain and Neural Sciences
Young-Joon Ha1, Youn-Sub Kim1, Hye-Jung Lee2, Jin-Hee Seo3, Yun-Hee Sung3, Sung-Eun Kim3, Mal-Soon Shin3 and Chang-Ju Kim3*
1Department of Anatomy-Meridian, College of Oriental Medicine, Kyungwon University, Sungnam 461-701, 2Acupuncture and Meridian Science Research Center, Kyung Hee University, 3Department of Physiology, College of Medicine, Kyung Hee University, Seoul 130-701, Korea
Correspondence to: *To whom correspondence should be addressed.
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Fucoidan, a sulfated polyanionic polymer of L-fucose, is obtained from brown marine macroalgae. In the present study, neuroprotective effect of fucoidan against N-methyl- D-aspartate (NMDA)-induced excitotoxicity in the hippocampus was investigated. The patch clamp study revealed that fucoidan significantly inhibited NMDA receptor-activated ion current in the acutely dissociated hippocampal CA1 neurons. In an organotypic hippocampal slice culture, fucoidan inhibited NMDA-induced neuronal cell death in a dose-dependent manner. The present study showed that fucoidan possesses a neuroprotective effect against NMDA-induced excitotoxicity, and that the suppressive effect of fucoidan on the NMDA-induced ion current can be suggested as being the underlying neuroprotective mechanism of fucoidan.
Keywords: fucoidan, N-methyl-D-aspartate, hippocampus, patch clamp, slice culture