桃红四物汤改善紫杉醇导致的大鼠外周神经损伤的机制研究
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篇名: 桃红四物汤改善紫杉醇导致的大鼠外周神经损伤的机制研究
TITLE: Study on the mechanism of Taohong siwu decoction improving peripheral nerve injury induced by paclitaxel in rats
摘要: 目的 探索桃红四物汤(THD)改善紫杉醇(PTX)导致的大鼠外周神经损伤的作用机制。方法考察THD(1g/mL含药血清)、PTX(0.1μmol/L)单用和联用下对施万细胞系RSC96细胞增殖率以及自噬溶酶体关联膜蛋白2(LAMP2)、自噬标记蛋白酵母Atg6同源物(Beclin1)、磷脂酰肌醇3-激酶(PI3K)、蛋白激酶B(Akt)、哺乳动物雷帕霉素靶蛋白(mTOR)表达的影响,并与自噬促进剂雷帕霉素和自噬抑制剂3-甲基腺嘌呤(3-MA)进行比较。考察THD高、低剂量对PTX导致的外周神经损伤模型大鼠坐骨神经中髓鞘碱性蛋白质(MBP)、鞘磷脂蛋白(MPZ)、S100钙结合蛋白(S100)、LAMP2、Beclin1、PI3K、Akt、mTOR表达的影响。结果THD+PTX作用下RSC96细胞增殖率显著高于PTX单用;THD+PTX、THD+3-MA作用下RSC96细胞中LAMP2、Beclin1蛋白的表达显著高于PTX、3-MA单用,PI3K、Akt、mTOR蛋白的表达显著低于PTX、3-MA单用(P<0.05)。与模型组相比,THD高、低剂量组大鼠坐骨神经中MBP、MPZ、S100、LAMP2、Beclin1蛋白表达均显著升高,PI3K、Akt、mTOR蛋白表达均显著降低(P<0.05)。结论THD可能通过抑制PI3K/Akt/mTOR信号通路来激活施万细胞自噬,从而改善PTX导致的外周神经损伤。
ABSTRACT: OBJECTIVE To explore the mechanism of Taohong siwu decoction (THD) improving peripheral nerve injury induced by paclitaxel (PTX) in rats. METHODS The effects of THD (1 g/mL drug-containing serum) and PTX (0.1 μmol/L) alone or in combination on the proliferation rate of Schwann cells line RSC96 as well as the expressions of lysosomal-associated membrane protein-2 (LAMP2), autophagy marker protein yeast Atg 6 homolog (Beclin1), phosphatidylinositol 3-kinase (PI3K), protein kinase B (Akt), and mammalian target of rapamycin (mTOR) were investigated, and then compared with autophagy promoter rapamycin and autophagy inhibitor 3-methyladenine (3-MA). The effects of high-dose and low-dose THD on the expressions of myelin basic protein (MBP) and myelin protein zero (MPZ), S100 calcium-binding protein (S100), LAMP2, Beclin1, PI3K, Akt and mTOR were tested at the end of the experiment. RESULTS After treatment of THD+PTX, the proliferation rate of RSC96 cells was significantly higher than those treated with PTX alone. After treatment of THD+PTX or THD+ 3-MA, the protein expressions of LAMP2 and Beclin1 in RSC96 cells were significantly higher than those treated with PTX or 3- MA alone, while the protein expressions of PI3K, Akt and mTOR were significantly lower than those treated with PTX or 3-MA alone (P<0.05). Compared with model group, the protein expressions of MBP, MPZ, S100, LAMP2 and Beclin1 in sciatic nerve of rats were increased significantly in THD high-dose and low-dose groups, while the protein expressions of PI3K, Akt and mTOR were significantly decreased (P<0.05). CONCLUSIONS THD may activate Schwann cell autophagy by inhibiting the PI3K/Akt/ mTOR signaling pathway, thereby improving peripheral nerve injury caused by PTX.
期刊: 2023年第34卷第14期
作者: 韩滨;郝晨伟;董敏;李正翔
AUTHORS: HAN Bin,HAO Chenwei,DONG Min,LI Zhengxiang
关键字: 桃红四物汤;紫杉醇;外周神经损伤;自噬;大鼠;施万细胞
KEYWORDS: Taohong siwu decoction; paclitaxel; peripheral nerve injury; autophagy; rat; Schwann cells
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