Neuroprotective Benzyl Benzoate Glycosides from Disporum viridescens Roots in HT22 Hippocampal Neuronal Cells
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Abstract
Bioassay-guided fractionation of the EtOAc extract from Disporum viridescens roots led to the isolation of five new benzyl benzoate glycosides, BBGs (1-5). The neuroprotective activities of the BBGs were screened using neuronal HT22 hippocampal cells. BBG-D (4) significantly protected murine hippocampal HT22 cells against glutamate-induced neurotoxicity by maintaining the antioxidative defense systems such as superoxide dismutase, glutathione reductase, glutathione peroxidase, and the glutathione content. BBG-D, in a dose-and time-dependent manner, increased HO-1 expression through the selective activation of pERK signaling among the MAPK pathways. These results suggest that BBG-D could be a promising candidate for the treatment of neurodegenerative diseases related to glutamate-induced oxidative neuronal cytotoxicity.
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