Effect of Pa-Bing Formula No. 2 on Morphological Changes of Substantia Nigra Cells in Parkinson's Disease Rats / 世界科学技术-中医药现代化

ABSTRACT

This article was aimed to study the protection effects of Pa-Bing Formula No. 2 (PBFN-2) on neurons of substantia nigra in Parkinson's disease (PD) rats models in order to explore the possible mechanism of PBFN-2 in PD treatment. Rats were stereotaxically injected with 6-hydroxydopamine (6-OHDA) solution into the left stria-tum in two-site. Rat showed consistent right whirling and the number of rotation was more than 7 r·min-1 induced by APO in 30 min, then the rat was judged as PD model. A total of 14 rats modeled successfully were randomly di-vided into the model group and the treatment group. At the same time, the normal group and sham operation group were also established. Same volume of distilled water was given to the normal group, sham operation group and the model group. PBFN-2 (32.0 g·kg-1) was given to the treatment group for 4 weeks. Microscope was used to observe pathological changes of substantia nigra by nissl stain and changes of TH, Nrf2 and HO-1 immunohistochemical stain. The results showed that compared with the normal group, the nissl bodies were badly injured. Expressions of TH-positive cells were obviously reduced (P<0.01). The expression of Nrf2 nucleus protein and HO-1 protein were obviously increased in substantia nigra of PD rats in model group (P<0.01). Compared to the model group, PBFN-2 effectively increased nissl bodies in neuronal cells of substantia nigra of PD rats, and elevated the number of TH-immunoreactive cells in substantia nigra (P<0.05). The expressions of Nrf2 nucleus protein, HO-1 protein were significantly up-regulated (P<0.05). It was concluded that PBFN-2 had an obvious neuroprotection on the neuronal cells in substantia nigra of PD rats induced by 6-OHDA. The underlying mechanisms may be associated with regu-lation of Nrf2 nucleus protein and HO-1 protein expressions.