A search for neuritogenic compounds in Chinese herbs resulted in the isolation of two known substances, ostruthin and (-)-bornyl ferulate, from Notopterygium incisum (and/or N. forbesii). Both compounds induced comparable neurite-like structures in 20% of rat PC12 cells at 2 micrograms/ml, and showed cytotoxicity at concentrations higher than 3 micrograms/ml.
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Qi et al. (1999) studied this question.
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