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Modified Yeoldahanso-tang (MYH) is a Korean herbal formula, containing 10 herbs: Pueraria lobata (Willd.) Ohwi, Angelica tenuissima Nakai, Scutellaria baicalensis Georgi, Platycodon grandiflorum (Jacq), Angelicae Dahurica, Cimicifuga heracleifolia Kom, Raphanus sativa L., Polygala tenuifolia (Willd.), Acorus gramineus Soland. and Dimocarpus longan Lour. The constitutive ratio of the ten herbs is at 6:4:2:1:2:2:2:4:6:6 in dry weight. MYH has been used to treat amnesia, hypochondria and dementia in Korea. In this study, we explored the possibility of using MYH in the prevention and treatment of Parkinson's disease (PD). Specifically, we made an effort to demonstrate the neuroprotective effects of MYH using experimental methods similar to those used in a recent study of PD.

1-Methyl-4-phenylpyridinium (MPP+) (400μM) was used to induce cytotoxicity in NGF …