School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611130, China.
Oxid Med Cell Longev. 2020 Jul 9;2020:3481758. doi: 10.1155/2020/3481758. eCollection 2020.
pericarp is a commonly used herbal medicine in China with effects of anti-inflammatory and analgesic, improving learning and memory ability, while hydroxy--sanshool (HAS) is the most important active ingredient of pericarps. The purpose of this study was to investigate the neuroprotective effect of HAS and its related possible mechanisms using a HO-stimulated PC12 cell model. CCK-8 assay results showed that HAS had a significant protective effect on HO-stimulated PC12 cells without obvious cytotoxicity on normal PC12 cells. Flow cytometry and fluorescence microscope (DAPI staining and DCFH-DA staining) indicated that HAS could reduce the HO-induced apoptosis in PC12 cells via reduction of intracellular ROS and increase of mitochondrial membrane potential (MMP). Subsequently, results of malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) determination suggested that HAS could increase the enzyme activities of SOD, CAT, and GSH-Px whereas it could decrease the MDA contents in HO-stimulated PC12 cells. Furthermore, the western blotting assays showed that HAS could upregulate the expressions of p-PI3k, Akt, p-Akt, and Bcl-2, while it could downregulate the expressions of cleaved caspase-3 and Bax in HO-stimulated PC12 cells. Collectively, it could be concluded according to our results that HAS possesses protective potentials on HO-stimulated PC12 cells through suppression of oxidative stress-induced apoptosis via regulation of PI3K/Akt signal pathway.
果皮是中国常用的草药,具有抗炎、镇痛、改善学习和记忆能力的作用,而羟基-山椒素(HAS)是果皮中最重要的活性成分。本研究旨在通过 HO 刺激的 PC12 细胞模型探讨 HAS 的神经保护作用及其相关可能机制。CCK-8 测定结果表明,HAS 对 HO 刺激的 PC12 细胞具有显著的保护作用,对正常 PC12 细胞无明显细胞毒性。流式细胞术和荧光显微镜(DAPI 染色和 DCFH-DA 染色)表明,HAS 可通过降低细胞内 ROS 和增加线粒体膜电位(MMP)来减少 HO 诱导的 PC12 细胞凋亡。随后,丙二醛(MDA)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和谷胱甘肽过氧化物酶(GSH-Px)测定结果表明,HAS 可增加 SOD、CAT 和 GSH-Px 的酶活性,同时降低 HO 刺激的 PC12 细胞中的 MDA 含量。此外,Western blot 检测结果表明,HAS 可上调 p-PI3k、Akt、p-Akt 和 Bcl-2 的表达,同时下调 HO 刺激的 PC12 细胞中 cleaved caspase-3 和 Bax 的表达。综上所述,根据我们的结果可以得出结论,HAS 通过调节 PI3K/Akt 信号通路抑制氧化应激诱导的细胞凋亡,对 HO 刺激的 PC12 细胞具有保护作用。