β-asarone, a major component of Acorus tatarinowii Schott, has positive effects in neurodegeneration disease, however, its effect on the Parkinson's disease (PD) remains unclear. In this study, the effects of β-asarone on behavioral tests, neurotransmitters, tyrosine hydroxylase (TH), and α-synuclein (α-syn) were investigated in 6-hydroxydopamine (6-OHDA) induced rats. Furthermore, the JNK/Bcl-2/Beclin-1 autophagy pathway was also studied. The results showed that β-asarone improved the behavioral symptoms of rats in the open field, rotarod test, initiation time, and stepping time. And it increased the HVA, Dopacl, and 5-HIAA levels in striatum but not the DA and 5-HT levels. After administration of β-asarone, the TH level was elevated but the α-syn was declined in rats. It inhibited the expressions of LC3-II, but increased the p62 expression in SN4741 cells. Moreover, it affected the expressions of Beclin-1, Bcl-2, JNK, and p-JNK in vivo. We deduced that β-asarone may firstly downregulate expressions of JNK and p-JNK, and then indirectly increase the expression of Bcl-2. And the function of Beclin-1 could be inhibited, which could inhibit autophagy activation. Collectively, all data indicated that β-asarone may be explored as a potential therapeutic agent in PD therapy.
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