Previous studies have shown that chrysophanol protects against learning and memory impairments in lead-exposed adult mice. In the present study, we investigated whether chrysophanol can alleviate learning and memory d...Previous studies have shown that chrysophanol protects against learning and memory impairments in lead-exposed adult mice. In the present study, we investigated whether chrysophanol can alleviate learning and memory dysfunction and hippocampal neuronal injury in lead-exposed neonatal mice. At the end of lactation, chrysophanol（0.1, 1.0, 10.0 mg/kg） was administered to the neonatal mice by intraperitoneal injection for 15 days. Chrysophanol significantly alleviated injury to hippocampal neurons and improved learning and memory abilities in the lead-poisoned neonatal mice. Chrysophanol also significantly decreased lead content in blood, brain, heart, spleen, liver and kidney in the lead-exposed neonatal mice. The levels of malondialdehyde in the brain, liver and kidney were significantly reduced, and superoxide dismutase and glutathione peroxidase activities were significantly increased after chrysophanol treatment. Collectively, these findings indicate that chrysophanol can significantly reduce damage to hippocampal neurons in lead-exposed neonatal mice.展开更多
目的:研究大黄酚对铅中毒小鼠学习记忆能力及组织内铅水平的改善作用,并探讨其可能的作用机制。方法:采用连续8 d ip 7 mg.kg-1醋酸铅造成铅中毒小鼠模型,采用跳台实验,观察ip大黄酚(10.0,1.0,0.1 mg.kg-1)对铅中毒模型小鼠记忆能力的...目的:研究大黄酚对铅中毒小鼠学习记忆能力及组织内铅水平的改善作用,并探讨其可能的作用机制。方法:采用连续8 d ip 7 mg.kg-1醋酸铅造成铅中毒小鼠模型,采用跳台实验,观察ip大黄酚(10.0,1.0,0.1 mg.kg-1)对铅中毒模型小鼠记忆能力的改善作用,并于大黄酚治疗14 d后测定小鼠心、肝、脾、肾内铅水平,同时测定小鼠肝、肾组织内丙二醛(MDA)含量及超氧化酶歧化酶(SOD),谷胱甘肽过氧化物酶(GSH-Px)活力。结果:连续8 d ip 7 mg.kg-1醋酸铅造成铅中毒小鼠模型学习记忆障碍,使小鼠心、肝、脾、肾内铅水平显著升高,小鼠肝、肾内SOD和GSH-Px活性显著降低,使MDA含量增加;而连续ip大黄酚14 d治疗后,可不同程度提高小鼠铅中毒后学习记忆能力,与模型组相比大黄酚治疗组均可显著降低心、肝、脾、肾铅含量(P<0.01);与模型组相比大黄酚10.0,1.0 mg.kg-1治疗组可显著升高肝、肾内SOD和GSH-Px的活性,降低MDA含量(P<0.01),而大黄酚0.1 mg.kg-1治疗组可显著升高肾内SOD和GSH-Px的活性,降低MDA含量(P<0.01),对肝内SOD,GSH-Px的活性及MDA含量无显著影响。结论:大黄酚可显著改善铅中毒小鼠学习记忆能力,降低铅中毒小鼠各组织的铅水平,提高小鼠肝、肾组织内抗氧化酶的活性,改善铅中毒造成的脂质过氧化。展开更多
基金financially supported by the Science and Technology Commission Foundation of Zhangjiakou City,No.1021098Dthe Medical Scientific Research Project of Health Bureau of Hebei Province,No.20100144+2 种基金the Natural Science Foundation of Hebei Province,No.H2012405016the Innovative Talents Project of Hebei North University,No.CXRC1325the Major Projects of Hebei North University,No.ZD201310
文摘Previous studies have shown that chrysophanol protects against learning and memory impairments in lead-exposed adult mice. In the present study, we investigated whether chrysophanol can alleviate learning and memory dysfunction and hippocampal neuronal injury in lead-exposed neonatal mice. At the end of lactation, chrysophanol（0.1, 1.0, 10.0 mg/kg） was administered to the neonatal mice by intraperitoneal injection for 15 days. Chrysophanol significantly alleviated injury to hippocampal neurons and improved learning and memory abilities in the lead-poisoned neonatal mice. Chrysophanol also significantly decreased lead content in blood, brain, heart, spleen, liver and kidney in the lead-exposed neonatal mice. The levels of malondialdehyde in the brain, liver and kidney were significantly reduced, and superoxide dismutase and glutathione peroxidase activities were significantly increased after chrysophanol treatment. Collectively, these findings indicate that chrysophanol can significantly reduce damage to hippocampal neurons in lead-exposed neonatal mice.
文摘目的:研究大黄酚对铅中毒小鼠学习记忆能力及组织内铅水平的改善作用,并探讨其可能的作用机制。方法:采用连续8 d ip 7 mg.kg-1醋酸铅造成铅中毒小鼠模型,采用跳台实验,观察ip大黄酚(10.0,1.0,0.1 mg.kg-1)对铅中毒模型小鼠记忆能力的改善作用,并于大黄酚治疗14 d后测定小鼠心、肝、脾、肾内铅水平,同时测定小鼠肝、肾组织内丙二醛(MDA)含量及超氧化酶歧化酶(SOD),谷胱甘肽过氧化物酶(GSH-Px)活力。结果:连续8 d ip 7 mg.kg-1醋酸铅造成铅中毒小鼠模型学习记忆障碍,使小鼠心、肝、脾、肾内铅水平显著升高,小鼠肝、肾内SOD和GSH-Px活性显著降低,使MDA含量增加;而连续ip大黄酚14 d治疗后,可不同程度提高小鼠铅中毒后学习记忆能力,与模型组相比大黄酚治疗组均可显著降低心、肝、脾、肾铅含量(P<0.01);与模型组相比大黄酚10.0,1.0 mg.kg-1治疗组可显著升高肝、肾内SOD和GSH-Px的活性,降低MDA含量(P<0.01),而大黄酚0.1 mg.kg-1治疗组可显著升高肾内SOD和GSH-Px的活性,降低MDA含量(P<0.01),对肝内SOD,GSH-Px的活性及MDA含量无显著影响。结论:大黄酚可显著改善铅中毒小鼠学习记忆能力,降低铅中毒小鼠各组织的铅水平,提高小鼠肝、肾组织内抗氧化酶的活性,改善铅中毒造成的脂质过氧化。
