The rhizome of Gastrodia elata(GE), a herb medicine, has been used for treatment of neuronal disorders in Eastern Asia for hundreds of years. Parishin C is a major ingredient of GE. In this study, the i.c.v. injection...The rhizome of Gastrodia elata(GE), a herb medicine, has been used for treatment of neuronal disorders in Eastern Asia for hundreds of years. Parishin C is a major ingredient of GE. In this study, the i.c.v. injection of soluble Aβ1–42oligomers model of LTP injury was used. We investigated the effects of parishin C on the improvement of LTP in soluble Aβ1–42oligomer–injected rats and the underlying electrophysiological mechanisms. Parishin C(i.p. or i.c.v.) significantly ameliorated LTP impairment induced by i.c.v. injection of soluble Aβ1–42oligomers. In cultured hippocampal neurons,soluble Aβ1–42oligomers significantly inhibited NMDAR currents while not affecting AMPAR currents and voltage-dependent currents. Pretreatment with parishin C protected NMDA receptor currents from the damage induced by Aβ. In summary, parishin C improved LTP deficits induced by soluble Aβ1–42oligomers. The protection by parishin C against Aβ-induced LTP damage might be related to NMDA receptors.展开更多
基金the National Nature Science Foundation of China(No.81373387)National Major Special Project on New Drug Innovation of China(No.2012ZX09301002-004)
文摘The rhizome of Gastrodia elata(GE), a herb medicine, has been used for treatment of neuronal disorders in Eastern Asia for hundreds of years. Parishin C is a major ingredient of GE. In this study, the i.c.v. injection of soluble Aβ1–42oligomers model of LTP injury was used. We investigated the effects of parishin C on the improvement of LTP in soluble Aβ1–42oligomer–injected rats and the underlying electrophysiological mechanisms. Parishin C(i.p. or i.c.v.) significantly ameliorated LTP impairment induced by i.c.v. injection of soluble Aβ1–42oligomers. In cultured hippocampal neurons,soluble Aβ1–42oligomers significantly inhibited NMDAR currents while not affecting AMPAR currents and voltage-dependent currents. Pretreatment with parishin C protected NMDA receptor currents from the damage induced by Aβ. In summary, parishin C improved LTP deficits induced by soluble Aβ1–42oligomers. The protection by parishin C against Aβ-induced LTP damage might be related to NMDA receptors.
文摘目的:建立天麻药材指纹图谱,考察不同剂量60Co-γ射线辐照灭菌对天麻药材中天麻素、对羟基苯甲醇、巴利森苷A、巴利森苷B、柠檬酸5个有效成分含量的影响。方法:利用HPLC法,采用wondasil C18(250 mm×4.6 mm,5μm)液相色谱柱,以乙腈-0.1%磷酸溶液为流动相,梯度洗脱;流速为1.0 ml·min^(-1);检测波长为220 nm;柱温为30℃,进样量为10μl,建立天麻药材HPLC指纹图谱。分别选择辐照剂量2,6,10 k Gy对天麻进行辐照,比较辐照前后天麻指纹图谱及5个有效成分的变化,并采用SPSS 22.0软件分析5个有效成分辐照前后含量变化。结果:共确定14个共有峰,不同剂量辐照前后天麻药材指纹图谱的相似度为0.918~0.999;辐照剂量不超过6 k Gy时,天麻药材中的天麻素、对羟基苯甲醇、巴利森苷A、巴利森苷B、柠檬酸含量变化无统计学意义(P>0.05)。结论:所建立的天麻指纹图谱及5个成分含量测定方法可作为天麻质控方法,在辐照剂量不超过6 k Gy时,60Co-γ辐照灭菌法可用于天麻药材的灭菌。
