目的:探讨二苯乙烯苷对慢性氟中毒致脑损伤大鼠学习记忆能力、氧化应激的影响。方法:30只大鼠随机分为对照组、模型组、实验组,每组大鼠10只。对照组大鼠给予去离子水自由饮用;模型组、实验组大鼠给予100 mg/L Na F溶液自由饮用,连续饮...目的:探讨二苯乙烯苷对慢性氟中毒致脑损伤大鼠学习记忆能力、氧化应激的影响。方法:30只大鼠随机分为对照组、模型组、实验组,每组大鼠10只。对照组大鼠给予去离子水自由饮用;模型组、实验组大鼠给予100 mg/L Na F溶液自由饮用,连续饮用12周。实验组给予二苯乙烯苷60 mg/(kg·d)灌胃,对照组和模型组给予等剂量生理盐水。比较各组大鼠逃避潜伏期、游泳时间百分比、穿过原平台次数及血浆SOD和MDA含量变化。结果:与模型组比较,实验组大鼠逃避潜伏期缩短(P<0.05);与模型组比较,实验组大鼠游泳时间百分比增加(P<0.05);与模型组比较,实验组大鼠穿过原平台次数增加(P<0.05);与模型组比较,实验组血浆SOD含量明显增加,MDA含量明显降低(P<0.05)。结论:二苯乙烯苷可明显改善慢性氟中毒致脑损伤大鼠学习记忆能力,通过降低MDA含量和提高SOD含量减轻脑损伤。展开更多
2,3,5,4'-tetra-hydroxystilbene-2-O-glucoside (THSG), the water-soluble active components extracted from dried tuber root of Polygonum multiflorurn (Polygonaceae), can promote the release of nitric oxide (NO) fr...2,3,5,4'-tetra-hydroxystilbene-2-O-glucoside (THSG), the water-soluble active components extracted from dried tuber root of Polygonum multiflorurn (Polygonaceae), can promote the release of nitric oxide (NO) from vascular endothelial cells and has strong antioxidation. The postconditioning's protection of THSG on cardiac ischemia-reperfusion injury and the mechanism were investigated. After reperfusion for 3 h following occlusion of rat left anterior descending coronary artery (LAD) for 30 min, SαT recovery speed, arrhythmia and cardiac infarct size were observed. The ischemic size and infarct size was identified by using Evans blue and TTC staining methods respectively. The results showed that the infarct size in THSG 7.5 mg/kg postconditioning group was significantly decreased from 43.6 %± 9.1% in mode group to 16.5% ±6.5% (P〈0.01). SaT recovery was quicker and the incidence of arrhythmia (55.6 % vs 100 %, P〈0.05) was significantly lower than in control group. The infarct size in THSG+glybenclamide group was greater than in THSG group, but equivalent to that in control group (46.8 %±9.8 % vs 43. 6 %±9.1%, P〉0. 05), SaT recovery speed slower and the incidence of arrhythmia also lower (33.3% vs 100%, P〈0.01), suggesting that glybenclamide could abolish the effects of THSG postconditioning reducing the cardiac infart size. It was concluded that THSG administration before reperfusion could effectively alleviate the cardiac reperfusion injury and possessed the postconditioning effects of reducing cardiac infarct size, which might be related with the KATe channel opening.展开更多
文摘目的:探讨二苯乙烯苷对慢性氟中毒致脑损伤大鼠学习记忆能力、氧化应激的影响。方法:30只大鼠随机分为对照组、模型组、实验组,每组大鼠10只。对照组大鼠给予去离子水自由饮用;模型组、实验组大鼠给予100 mg/L Na F溶液自由饮用,连续饮用12周。实验组给予二苯乙烯苷60 mg/(kg·d)灌胃,对照组和模型组给予等剂量生理盐水。比较各组大鼠逃避潜伏期、游泳时间百分比、穿过原平台次数及血浆SOD和MDA含量变化。结果:与模型组比较,实验组大鼠逃避潜伏期缩短(P<0.05);与模型组比较,实验组大鼠游泳时间百分比增加(P<0.05);与模型组比较,实验组大鼠穿过原平台次数增加(P<0.05);与模型组比较,实验组血浆SOD含量明显增加,MDA含量明显降低(P<0.05)。结论:二苯乙烯苷可明显改善慢性氟中毒致脑损伤大鼠学习记忆能力,通过降低MDA含量和提高SOD含量减轻脑损伤。
文摘2,3,5,4'-tetra-hydroxystilbene-2-O-glucoside (THSG), the water-soluble active components extracted from dried tuber root of Polygonum multiflorurn (Polygonaceae), can promote the release of nitric oxide (NO) from vascular endothelial cells and has strong antioxidation. The postconditioning's protection of THSG on cardiac ischemia-reperfusion injury and the mechanism were investigated. After reperfusion for 3 h following occlusion of rat left anterior descending coronary artery (LAD) for 30 min, SαT recovery speed, arrhythmia and cardiac infarct size were observed. The ischemic size and infarct size was identified by using Evans blue and TTC staining methods respectively. The results showed that the infarct size in THSG 7.5 mg/kg postconditioning group was significantly decreased from 43.6 %± 9.1% in mode group to 16.5% ±6.5% (P〈0.01). SaT recovery was quicker and the incidence of arrhythmia (55.6 % vs 100 %, P〈0.05) was significantly lower than in control group. The infarct size in THSG+glybenclamide group was greater than in THSG group, but equivalent to that in control group (46.8 %±9.8 % vs 43. 6 %±9.1%, P〉0. 05), SaT recovery speed slower and the incidence of arrhythmia also lower (33.3% vs 100%, P〈0.01), suggesting that glybenclamide could abolish the effects of THSG postconditioning reducing the cardiac infart size. It was concluded that THSG administration before reperfusion could effectively alleviate the cardiac reperfusion injury and possessed the postconditioning effects of reducing cardiac infarct size, which might be related with the KATe channel opening.