Flavonoids have been reported to have therapeutic potential for spinal cord injury.Hawthorn leaves have abundant content and species of total flavonoids,and studies of the effects of the total flavonoids of hawthorn l...Flavonoids have been reported to have therapeutic potential for spinal cord injury.Hawthorn leaves have abundant content and species of total flavonoids,and studies of the effects of the total flavonoids of hawthorn leaves on spinal cord injury have not been published in or outside China.Therefore,Sprague-Dawley rats were used to establish a spinal cord injury model by Allen's method.Rats were intraperitoneally injected with 0.2 m L of different concentrations of total flavonoids of hawthorn leaves(5,10,and 20 mg/kg)after spinal cord injury.Injections were administered once every 6 hours,three times a day,for 14 days.After treatment with various concentrations of total flavonoids of hawthorn leaves,the Basso,Beattie,and Bresnahan scores and histological staining indicated decreases in the lesion cavity and number of apoptotic cells of the injured spinal cord tissue;the morphological arrangement of the myelin sheath and nerve cells tended to be regular;and the Nissl bodies in neurons increased.The Basso,Beattie,and Bresnahan scores of treated spinal cord injury rats were increased.Western blot assays showed that the expression levels of pro-apoptotic Bax and cleaved caspase-3 were decreased,but the expression level of the anti-apoptotic Bcl-2 protein was increased.The improvement of the above physiological indicators showed a dose-dependent relationship with the concentration of total flavonoids of hawthorn leaves.The above findings confirm that total flavonoids of hawthorn leaves can reduce apoptosis and exert neuroprotective effects to promote the recovery of the motor function of rats with spinal cord injury.This study was approved by the Ethics Committee of the Guangxi Medical University of China(approval No.201810042)in October 2018.展开更多
Objective： To investigate the effects and mechanisms of hawthorn leaves flavonoids （HLF） on acute myocardial ischemiaJreperfusion in anesthetized dogs. Methods： The acute ischemia models were prepared by ligating ...Objective： To investigate the effects and mechanisms of hawthorn leaves flavonoids （HLF） on acute myocardial ischemiaJreperfusion in anesthetized dogs. Methods： The acute ischemia models were prepared by ligating left anterior descending （LAD） artery for 60 min. Qualified 15 male dogs were randomly divided into 3 groups with 5 in each group： blank control （treated with normal saline 3 mL/kg） group, HLF low dosage （5 mg/kg） group and high dosage （10 mg/kg） group, with an once injection through a femoral vein 5 min before reperfusion. Epicardial electrocardiogram was adopted to measure the scope and degree of myocardial ischemia. Simultaneously, neutrophil infiltration in infarct （Inf） and remote site （RS） of myocardial tissue was measured by myeloperoxidase （MPO） activity assay. The serum interleukin-1 （IL-1） and tumor necrosis factor~ （TNF-~） content were quantified by radioimmuno-assay. Furthermore, expression of G protein-coupled receptor kinase 2 （GRK2） and nuclear factor K B （NF- K B） in Inf and RS tissue were detected by Western blotting technique. Results： Ischemia and reperfusion increased the MPO activity and IL-1 and TNF-~ content. HLF （10 and 5 mg/kg） could significantly decrease the degree and scope of myocardial ischemia; markedly inhibit the increase of MPO activity, and IL-1 and TNF-o~ content induced by myocardial ischemia/infarction. Furthermore, HLF increased GRK2 expression and inhibited NF- K B expression in Inf tissue. Conclusion： HLF could improve the situation of acute myocardial ischemia and inhibit the inflammation in anesthetized dogs, which might be due to its increasing effect on the GRK2 and NF- K B expressions.展开更多
目的:比较不同种、不同产地及不同采收期山楂叶中8种主要多元酚类成分(牡荆素、牡荆素2″O 鼠李糖苷、芦丁、绿原酸、槲皮素、金丝桃苷、4 O 葡萄糖牡荆素和4 O 鼠李糖芦丁)的含量。方法:用高效液相色谱(HPLC)法。色谱柱为LichrospherC1...目的:比较不同种、不同产地及不同采收期山楂叶中8种主要多元酚类成分(牡荆素、牡荆素2″O 鼠李糖苷、芦丁、绿原酸、槲皮素、金丝桃苷、4 O 葡萄糖牡荆素和4 O 鼠李糖芦丁)的含量。方法:用高效液相色谱(HPLC)法。色谱柱为LichrospherC18(250×4.6mmI.D.,5μm);流动相A为乙腈-四氢呋喃(95∶5)、B为0.5%磷酸水溶液,梯度洗脱,0 ～12minA由12%～17%,12～25minA由17%～18%,25～35minA由18%～40%,35～40minA由40%～100%,40～45 minA为100%,流速1ml/min;柱温30℃;进样量10μl;检测波长360nm。结果:野山楂叶中这8种多元酚类成分的总含量最高(3.70%～6.20%),其次是山里红叶(1.12%～2.28%),再次是单子山楂叶(0.98%),云南山楂叶中这8种成分的含量最低(0.70%～0.87%)。对同种的山楂叶来说,其含量随着产地及采收期的不同有着较大差异,含量最高的野山楂叶采自江西于都县,山里红叶中含量最高的是采自山东日照市;对不同时期采收的山里红叶分析表明,嫩叶中尤其是开花期(五月)采收的叶中这8种成分的含量最高,然后慢慢降低到一个相对稳定的水平。结论:不同种、不同产地及不同采收期的山楂叶中这8种主要多元酚类成分的含量存在明显的差异。展开更多
为了研究超高压提取山楂叶中黄酮类化合物的最佳工艺,采用超高压技术常温提取,正交试验优化,分光光度法检测山楂叶中黄酮类化合物的含量。结果表明:超高压提取山楂叶中黄酮类化合物的最佳提取工艺参数为:提取溶剂为50%乙醇,提取压力为40...为了研究超高压提取山楂叶中黄酮类化合物的最佳工艺,采用超高压技术常温提取,正交试验优化,分光光度法检测山楂叶中黄酮类化合物的含量。结果表明:超高压提取山楂叶中黄酮类化合物的最佳提取工艺参数为:提取溶剂为50%乙醇,提取压力为400 MPa,料液比为1∶45,提取温度为60℃,提取时间为3 m in。该超高压提取工艺具有提取效率高、时间短、杂质含量少等优点。展开更多
基金the National Natural Science Foundation of China,No.81860391(to GFZ)the Natural Science Foundation of Guangxi Zhuang Autonomous Region of China,No.2018GXNSFAA281144(to GFZ)the Key Research and Development Project of Guangxi Zhuang Autonomous Region of China,No.guike AB18221021(to SHZ)。
文摘Flavonoids have been reported to have therapeutic potential for spinal cord injury.Hawthorn leaves have abundant content and species of total flavonoids,and studies of the effects of the total flavonoids of hawthorn leaves on spinal cord injury have not been published in or outside China.Therefore,Sprague-Dawley rats were used to establish a spinal cord injury model by Allen's method.Rats were intraperitoneally injected with 0.2 m L of different concentrations of total flavonoids of hawthorn leaves(5,10,and 20 mg/kg)after spinal cord injury.Injections were administered once every 6 hours,three times a day,for 14 days.After treatment with various concentrations of total flavonoids of hawthorn leaves,the Basso,Beattie,and Bresnahan scores and histological staining indicated decreases in the lesion cavity and number of apoptotic cells of the injured spinal cord tissue;the morphological arrangement of the myelin sheath and nerve cells tended to be regular;and the Nissl bodies in neurons increased.The Basso,Beattie,and Bresnahan scores of treated spinal cord injury rats were increased.Western blot assays showed that the expression levels of pro-apoptotic Bax and cleaved caspase-3 were decreased,but the expression level of the anti-apoptotic Bcl-2 protein was increased.The improvement of the above physiological indicators showed a dose-dependent relationship with the concentration of total flavonoids of hawthorn leaves.The above findings confirm that total flavonoids of hawthorn leaves can reduce apoptosis and exert neuroprotective effects to promote the recovery of the motor function of rats with spinal cord injury.This study was approved by the Ethics Committee of the Guangxi Medical University of China(approval No.201810042)in October 2018.
基金The Chinese Journal of Integrated Traditional and Western Medicine Press and Springer-Verlag Berlin Heidelberg 2012 ＊Supported by Project of National Natural Science Foundation of Beijing （No. 7092089） and the National Key New Drug Project （2009ZX09301-005）
文摘Objective： To investigate the effects and mechanisms of hawthorn leaves flavonoids （HLF） on acute myocardial ischemiaJreperfusion in anesthetized dogs. Methods： The acute ischemia models were prepared by ligating left anterior descending （LAD） artery for 60 min. Qualified 15 male dogs were randomly divided into 3 groups with 5 in each group： blank control （treated with normal saline 3 mL/kg） group, HLF low dosage （5 mg/kg） group and high dosage （10 mg/kg） group, with an once injection through a femoral vein 5 min before reperfusion. Epicardial electrocardiogram was adopted to measure the scope and degree of myocardial ischemia. Simultaneously, neutrophil infiltration in infarct （Inf） and remote site （RS） of myocardial tissue was measured by myeloperoxidase （MPO） activity assay. The serum interleukin-1 （IL-1） and tumor necrosis factor~ （TNF-~） content were quantified by radioimmuno-assay. Furthermore, expression of G protein-coupled receptor kinase 2 （GRK2） and nuclear factor K B （NF- K B） in Inf and RS tissue were detected by Western blotting technique. Results： Ischemia and reperfusion increased the MPO activity and IL-1 and TNF-~ content. HLF （10 and 5 mg/kg） could significantly decrease the degree and scope of myocardial ischemia; markedly inhibit the increase of MPO activity, and IL-1 and TNF-o~ content induced by myocardial ischemia/infarction. Furthermore, HLF increased GRK2 expression and inhibited NF- K B expression in Inf tissue. Conclusion： HLF could improve the situation of acute myocardial ischemia and inhibit the inflammation in anesthetized dogs, which might be due to its increasing effect on the GRK2 and NF- K B expressions.
文摘目的:比较不同种、不同产地及不同采收期山楂叶中8种主要多元酚类成分(牡荆素、牡荆素2″O 鼠李糖苷、芦丁、绿原酸、槲皮素、金丝桃苷、4 O 葡萄糖牡荆素和4 O 鼠李糖芦丁)的含量。方法:用高效液相色谱(HPLC)法。色谱柱为LichrospherC18(250×4.6mmI.D.,5μm);流动相A为乙腈-四氢呋喃(95∶5)、B为0.5%磷酸水溶液,梯度洗脱,0 ～12minA由12%～17%,12～25minA由17%～18%,25～35minA由18%～40%,35～40minA由40%～100%,40～45 minA为100%,流速1ml/min;柱温30℃;进样量10μl;检测波长360nm。结果:野山楂叶中这8种多元酚类成分的总含量最高(3.70%～6.20%),其次是山里红叶(1.12%～2.28%),再次是单子山楂叶(0.98%),云南山楂叶中这8种成分的含量最低(0.70%～0.87%)。对同种的山楂叶来说,其含量随着产地及采收期的不同有着较大差异,含量最高的野山楂叶采自江西于都县,山里红叶中含量最高的是采自山东日照市;对不同时期采收的山里红叶分析表明,嫩叶中尤其是开花期(五月)采收的叶中这8种成分的含量最高,然后慢慢降低到一个相对稳定的水平。结论:不同种、不同产地及不同采收期的山楂叶中这8种主要多元酚类成分的含量存在明显的差异。
文摘为了研究超高压提取山楂叶中黄酮类化合物的最佳工艺,采用超高压技术常温提取,正交试验优化,分光光度法检测山楂叶中黄酮类化合物的含量。结果表明:超高压提取山楂叶中黄酮类化合物的最佳提取工艺参数为:提取溶剂为50%乙醇,提取压力为400 MPa,料液比为1∶45,提取温度为60℃,提取时间为3 m in。该超高压提取工艺具有提取效率高、时间短、杂质含量少等优点。
