Objective To investigate the effects of erigeron breviscapus (Vant.) Hand-Mazz (erigeron breviscapus) pretreatment on pathology and oxyradical level in the spinal cord after ischemia-reperfusion (I/R) injury in rabbit...Objective To investigate the effects of erigeron breviscapus (Vant.) Hand-Mazz (erigeron breviscapus) pretreatment on pathology and oxyradical level in the spinal cord after ischemia-reperfusion (I/R) injury in rabbits. Methods A total of 40 New Zealand white rabbits were randomly divided into three groups: sham-operation group with 10 rabbits treated with only abdominal aorta exposure without occlusion,control group with 15 rabbits that underwent ischemia for 50 minutes and treated with matched saline,and experimental group with 15 rabbits that underwent ischemia for 50 minutes and treated with erigeron breviscapus (9mg/kg) injection before ischemia. Malondialdehyde (MDA) level and superoxide dismutase (SOD) activity in the spinal cord were examined at 6 and 24 hours after I/R,respectively. The morphological changes and the number of the spinal cord anterior horn motor neurons were observed and counted under the light microscope and electron microscope,respectively. Results The level of MDA was markedly decreased and SOD activity was increased in the experimental group compared with those in the control group (P<0.01). Compared with that in the control group,the number of motor neurons in the experimental group significantly increased at 24h after I/R (P<0.01) and the morphous of the motor neurons improved. Conclusion Erigeron breviscapus can reduce oxyradical production and the apoptosis of nerve cells,and protect nerve tissue structure and function after spinal cord I/R.展开更多
目的:对云南重楼Paris polyphylla Smith var.yunnanensis(Franch.)Hand.-Mazz.果皮进行化学成分研究。方法:利用大孔吸附树脂、硅胶柱、Sephadex LH-20葡聚糖凝胶柱及半制备型高效液相等色谱方法对云南重楼果皮进行化学成分研究,根据...目的:对云南重楼Paris polyphylla Smith var.yunnanensis(Franch.)Hand.-Mazz.果皮进行化学成分研究。方法:利用大孔吸附树脂、硅胶柱、Sephadex LH-20葡聚糖凝胶柱及半制备型高效液相等色谱方法对云南重楼果皮进行化学成分研究,根据波谱数据鉴定化合物的结构,并对化合物1进行抗菌、抗炎活性研究。结果:从云南重楼果皮中分离得到9个化合物,分别鉴定为:23α,27-二羟基薯蓣皂苷元(1)、薯蓣皂苷元酮(2)、cyclopinnatol(3)、23(E)-cycloart-23-en-3β,25-diol(4)、nuatigenin(5)、薯蓣皂苷元(6)、β-蜕皮激素(7)、pinnatasterone(8)、benzyl alcohol-β-D-apiofuranosyl-(1→6)-β-D-glucopyranoside(9)。结论:其中,化合物1为新化合物,化合物2~4、9为首次从重楼属植物中分离得到。化合物1具有抗丙酸痤疮杆菌、表皮葡萄球菌和金黄色葡萄球菌活性和一定的抗炎活性。展开更多
文摘Objective To investigate the effects of erigeron breviscapus (Vant.) Hand-Mazz (erigeron breviscapus) pretreatment on pathology and oxyradical level in the spinal cord after ischemia-reperfusion (I/R) injury in rabbits. Methods A total of 40 New Zealand white rabbits were randomly divided into three groups: sham-operation group with 10 rabbits treated with only abdominal aorta exposure without occlusion,control group with 15 rabbits that underwent ischemia for 50 minutes and treated with matched saline,and experimental group with 15 rabbits that underwent ischemia for 50 minutes and treated with erigeron breviscapus (9mg/kg) injection before ischemia. Malondialdehyde (MDA) level and superoxide dismutase (SOD) activity in the spinal cord were examined at 6 and 24 hours after I/R,respectively. The morphological changes and the number of the spinal cord anterior horn motor neurons were observed and counted under the light microscope and electron microscope,respectively. Results The level of MDA was markedly decreased and SOD activity was increased in the experimental group compared with those in the control group (P<0.01). Compared with that in the control group,the number of motor neurons in the experimental group significantly increased at 24h after I/R (P<0.01) and the morphous of the motor neurons improved. Conclusion Erigeron breviscapus can reduce oxyradical production and the apoptosis of nerve cells,and protect nerve tissue structure and function after spinal cord I/R.
