Bae Jinbum, Lee Danbi, Kim Yun Kyu, Gil Minchan, Lee Joo-Yong, Lee Kyung Jin
Asan Institute for Life Sciences, Asan Medical Center, Seoul 138-736, Korea.
Mol Cells. 2013 Feb;35(2):151-7. doi: 10.1007/s10059-013-2298-5. Epub 2013 Jan 16.
Berberine (BBR) is one of the major alkaloids and has been reported to have a variety of pharmacologic effects, including inhibition of cell cycle progression. Here, we investigated the mechanisms of BBR protection of neuronal cells from cell death induced by the Parkinson's disease-related neurotoxin 6-hydroxydopamine (6-OHDA). Pretreatment of SH-SY5Y cells with BBR significantly reduced 6-OHDAinduced generation of reactive oxygen species (ROS), caspase-3 activation, and subsequent cell death. BBR also upregulated heme oxygenase-1 (HO-1) expression, which conferred protection against 6-OHDA-induced dopaminergic neuron injury and besides, effect of BBR on HO-1 was reversed by siRNA-Nrf2. Furthermore, BBR induced PI3K/Akt and p38 activation, which are involved in the induction of Nrf2 expression and neuroprotection. These results suggest that BBR may be useful as a therapeutic agent for the treatment of dopaminergic neuronal diseases.
黄连素(BBR)是主要生物碱之一,据报道具有多种药理作用,包括抑制细胞周期进程。在此,我们研究了黄连素保护神经元细胞免受帕金森病相关神经毒素6-羟基多巴胺(6-OHDA)诱导的细胞死亡的机制。用黄连素预处理SH-SY5Y细胞可显著减少6-OHDA诱导的活性氧(ROS)生成、半胱天冬酶-3激活及随后的细胞死亡。黄连素还上调了血红素加氧酶-1(HO-1)的表达,这赋予了对6-OHDA诱导的多巴胺能神经元损伤的保护作用,此外,黄连素对HO-1的作用被siRNA-Nrf2逆转。此外,黄连素诱导PI3K/Akt和p38激活,这参与了Nrf2表达的诱导和神经保护。这些结果表明,黄连素可能作为治疗多巴胺能神经元疾病的治疗剂。