title: Verbascoside promotes the regeneration of tyrosine hydroxylase-immunoreactive neurons in the substantia nigra.
abstract: Tyrosine hydroxylase is a key enzyme in dopamine biosynthesis. Change in tyrosine hydroxylase expression in the nigrostriatal system is closely related to the occurrence and development of Parkinson's disease. Verbascoside, an extract from Radix Rehmanniae Praeparata has been shown to be clinically effective in treating Parkinson's disease. However, the underlying mechanisms remain unclear. It is hypothesized that the effects of verbascoside on Parkinson's disease are related to tyrosine hydroxylase expression change in the nigrostriatal system. Rat models of Parkinson's disease were established and verbascoside (60 mg/kg) was administered intraperitoneally once a day. After 6 weeks of verbascoside treatment, rat rotational behavior was alleviated; tyrosine hydroxylase mRNA and protein expression and the number of tyrosine hydroxylase-immunoreactive neurons in the rat right substantia nigra were significantly higher than the Parkinson's model group. These findings suggest that the mechanism by which verbascoside treats Parkinson's disease is related to the regeneration of tyrosine hydroxylase-immunoreactive neurons in the substantia nigra.
authors.affiliation: Shanghai University of Traditional Chinese Medicine, Shanghai, China.
authors.forename: Jian-Qing
authors.initials: JQ
authors.lastname: Liang
authors.affiliation: Shanghai University of Traditional Chinese Medicine, Shanghai, China.
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.affiliation: Shanghai University of Traditional Chinese Medicine, Shanghai, China.
authors.forename: Jian-Cheng
authors.identifier: 0000-0002-0884-4254
authors.initials: JC
authors.lastname: He
authors.affiliation: Shanghai University of Traditional Chinese Medicine, Shanghai, China.
authors.forename: Xian-Dong
authors.initials: XD
authors.lastname: Hua
keywords: Parkinson's disease; rats; dyskinesia; nerve regeneration; neural regeneration; neurological behavior; traditional Chinese medicine; tyrosine hydroxylase; verbascoside