OBJECTIVE The plant of Anchusa italicahas been traditionally used in Uighur medicine for the treatment of cardiovascular and cerebrovascular diseases in China.Our previous study showed that total flavonoids from Anchu...OBJECTIVE The plant of Anchusa italicahas been traditionally used in Uighur medicine for the treatment of cardiovascular and cerebrovascular diseases in China.Our previous study showed that total flavonoids from Anchusa italica(TFAI)exhibited potent cardioprotection on acute ischemia/reperfusion injured rats.This study was undertaken to investigate the effects of TFAI on chronic myocardial infarction in mice and the underlying mechanism.METHODS Total flavonoids were extracted from the whole herb of Anchusa italica and were characterized using HPLC-MS analysis.The left anterior descending branch of coronary artery was ligated to induce myocardial infarction in mice.After surgery,the mice were orally fed with TFAI at the doses of 10,30 and 50 mg·kg-1 body mass per day for a total of four weeks.Cardiac function and infarct size were measured,and the levels of inflammatory mediators were detected.Hematoxylin and eosin(HE)stain and Masson Trichrome stain were performed.The apoptotic factors such as Bax,Bcl-2 and cleaved caspase 3 as well as the key proteins in the PI3K/Akt/mTOR signaling pathway were examined by Western blotting.RESULTS The content of total flavonoids in TFAI was 56.2%.Four weeks following the MI surgery,TFAI enhanced the survival rate in post-MI mice.TFAI administration at the doses of 30 and 50 mg·kg-1 significantly reduced the infarct size and improved cardiac function indicated by elevated EF and FS.Assay of inflammation factors showed that the sera levels of TNF-α,IL-1β and IL-6 were significantly decreased by TFAI treatment as compared to the MI group.HE stain and Masson Trichrome stain demonstrated that TFAI suppressed myocyte hypertrophy and cardiac fibrosis indicated by decreased cross-section area and collagen volume.Western blot analysis showed that cleaved caspase 3 and Bax/Bcl-2 were signifi⁃cantly downregulated following TFAI treatment.Additionally,TFAI treatment significantly suppressed the activation of the PI3K/Akt/mTOR signaling pathway.CONCLUSION TFAI exerts a protective effect against chronic myocardial infarction and its beneficial effects on cardiac function and cardiac remodeling might be at least attributable to anti-inflammation and suppression of the PI3K/Akt/mTOR signaling pathway.展开更多
以传统药用植物意大利牛舌草(Anchusa italica Retz.)的临床功效和现代药理学研究为基础,通过构建体外抑郁症模型,系统研究牛舌草的药理作用及物质基础.HPLC检测不同产地(新疆、巴基斯坦、海南)牛舌草总黄酮(TFAI)的化学成分;然后用海...以传统药用植物意大利牛舌草(Anchusa italica Retz.)的临床功效和现代药理学研究为基础,通过构建体外抑郁症模型,系统研究牛舌草的药理作用及物质基础.HPLC检测不同产地(新疆、巴基斯坦、海南)牛舌草总黄酮(TFAI)的化学成分;然后用海马细胞(HT-22)通过皮质酮诱导建立神经细胞损伤模型,MTT法检测了5种牛舌草对HT-22细胞活力的影响,并计算其EC_(50).结果表明不同产地TFAI在500µg/mL浓度下对HT-22细胞均未表现出明显的细胞毒性作用,且对HT-22细胞具有显著的增殖作用,对过量皮质酮诱导的海马细胞损伤具有明显的细胞保护作用,比较5批牛舌草中的总黄酮含量和EC_(50)值,海南产地的牛舌草中的黄酮类含量最高,且对HT-22细胞的增殖作用EC_(50)值最低,具有较高的效价.研究结果说明五批TFAI提取物对皮质酮诱导的HT-22海马细胞损伤均具有保护作用,可以不同程度地增加HT-22细胞活力,具有显著的神经保护作用.展开更多
目的研究意大利牛舌草(Anchusa italica Retz)不同极性溶剂萃取物对大鼠对缺氧/复氧心肌细胞(myocardial cells,MCs)氧化应激损伤保护作用的影响。方法模拟缺血再灌注损伤,建立体外培养心肌细胞缺氧/复氧模型,分为12组,正常对照组,缺氧...目的研究意大利牛舌草(Anchusa italica Retz)不同极性溶剂萃取物对大鼠对缺氧/复氧心肌细胞(myocardial cells,MCs)氧化应激损伤保护作用的影响。方法模拟缺血再灌注损伤,建立体外培养心肌细胞缺氧/复氧模型,分为12组,正常对照组,缺氧/复氧模型组,阳性对照组,处理组包括:高、中、低剂量乙酸乙酯萃取物+缺氧/复氧模型组;高、中、低剂量正丁醇萃取物+缺氧/复氧模型组;高、中、低剂量水萃取物+缺氧/复氧模型组。采用MTT法测定心肌细胞存活率;酶标仪检测细胞培养上清液中乳酸脱氢酶(LDH)水平及细胞内的丙二醛(MDA)含量和细胞内超氧化物歧化酶(SOD)的活力。结果与缺氧/复氧模型组比较,意大利牛舌草乙酸乙酯萃取物高剂量组、正丁醇萃取物高剂量组、水萃取物高剂量组心肌细胞存活率升高,LDH水平及MDA含量降低,SOD活力提高,差异有统计学意义(P<0.01)。结论意大利牛舌草乙酸乙酯萃取物、正丁醇萃取物、水萃取物对缺氧/复氧心肌细胞的损伤具有保护作用,其机制可能与平衡氧化应激产物和抗氧化应激的酶系统有关。展开更多
目的建立大鼠肠温孵液中意大利牛舌草4种成分(芦丁、山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸)的一测多评方法(Quantitative Analysis of Multi-components by Single-marker,QAMS)。方法采用聚酰胺柱色谱对意大利牛舌草粗提物进行纯化...目的建立大鼠肠温孵液中意大利牛舌草4种成分(芦丁、山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸)的一测多评方法(Quantitative Analysis of Multi-components by Single-marker,QAMS)。方法采用聚酰胺柱色谱对意大利牛舌草粗提物进行纯化。建立同时测定大鼠肠温孵液中意大利牛舌草提取物主要成分芦丁、山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸的高效液相色谱定量分析方法。以芦丁为内参物,测定大鼠肠温孵液中意大利牛舌草提取物主要成分芦丁与山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸的相对校正因子(Relative Correction Factor,RCF),利用RCF进行含量计算(计算值),并与外标法(External Standard Method,ESM)的测定结果(实测值)进行比较,对该方法进行可行性验证。结果采用ESM法测定8个批次的大鼠肠温孵液中意大利牛舌草提取物主要成分芦丁、山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸的平均含量分别为14.20、15.88、9.80、66.90 mg/g。在线性范围内,芦丁与山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸的RCF分别为0.983、1.101、0.843(RSD值均<2%)。利用RCF计算得山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸的平均含量分别为15.67、9.87、67.44 mg/g,两种方法的含量测定结果基本一致(相对偏差均<2%)。结论一测多评法简便、准确、可行,可用于大鼠肠温孵液中意大利牛舌草提取物山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸的含量测定。展开更多
基金CAMS Innovation Fund for Medical Sciences(CIFMS)318(2016-I2M-3-007)National Natural Science Foundation of China(81673422and 81202538)
文摘OBJECTIVE The plant of Anchusa italicahas been traditionally used in Uighur medicine for the treatment of cardiovascular and cerebrovascular diseases in China.Our previous study showed that total flavonoids from Anchusa italica(TFAI)exhibited potent cardioprotection on acute ischemia/reperfusion injured rats.This study was undertaken to investigate the effects of TFAI on chronic myocardial infarction in mice and the underlying mechanism.METHODS Total flavonoids were extracted from the whole herb of Anchusa italica and were characterized using HPLC-MS analysis.The left anterior descending branch of coronary artery was ligated to induce myocardial infarction in mice.After surgery,the mice were orally fed with TFAI at the doses of 10,30 and 50 mg·kg-1 body mass per day for a total of four weeks.Cardiac function and infarct size were measured,and the levels of inflammatory mediators were detected.Hematoxylin and eosin(HE)stain and Masson Trichrome stain were performed.The apoptotic factors such as Bax,Bcl-2 and cleaved caspase 3 as well as the key proteins in the PI3K/Akt/mTOR signaling pathway were examined by Western blotting.RESULTS The content of total flavonoids in TFAI was 56.2%.Four weeks following the MI surgery,TFAI enhanced the survival rate in post-MI mice.TFAI administration at the doses of 30 and 50 mg·kg-1 significantly reduced the infarct size and improved cardiac function indicated by elevated EF and FS.Assay of inflammation factors showed that the sera levels of TNF-α,IL-1β and IL-6 were significantly decreased by TFAI treatment as compared to the MI group.HE stain and Masson Trichrome stain demonstrated that TFAI suppressed myocyte hypertrophy and cardiac fibrosis indicated by decreased cross-section area and collagen volume.Western blot analysis showed that cleaved caspase 3 and Bax/Bcl-2 were signifi⁃cantly downregulated following TFAI treatment.Additionally,TFAI treatment significantly suppressed the activation of the PI3K/Akt/mTOR signaling pathway.CONCLUSION TFAI exerts a protective effect against chronic myocardial infarction and its beneficial effects on cardiac function and cardiac remodeling might be at least attributable to anti-inflammation and suppression of the PI3K/Akt/mTOR signaling pathway.
文摘以传统药用植物意大利牛舌草(Anchusa italica Retz.)的临床功效和现代药理学研究为基础,通过构建体外抑郁症模型,系统研究牛舌草的药理作用及物质基础.HPLC检测不同产地(新疆、巴基斯坦、海南)牛舌草总黄酮(TFAI)的化学成分;然后用海马细胞(HT-22)通过皮质酮诱导建立神经细胞损伤模型,MTT法检测了5种牛舌草对HT-22细胞活力的影响,并计算其EC_(50).结果表明不同产地TFAI在500µg/mL浓度下对HT-22细胞均未表现出明显的细胞毒性作用,且对HT-22细胞具有显著的增殖作用,对过量皮质酮诱导的海马细胞损伤具有明显的细胞保护作用,比较5批牛舌草中的总黄酮含量和EC_(50)值,海南产地的牛舌草中的黄酮类含量最高,且对HT-22细胞的增殖作用EC_(50)值最低,具有较高的效价.研究结果说明五批TFAI提取物对皮质酮诱导的HT-22海马细胞损伤均具有保护作用,可以不同程度地增加HT-22细胞活力,具有显著的神经保护作用.
文摘目的研究意大利牛舌草(Anchusa italica Retz)不同极性溶剂萃取物对大鼠对缺氧/复氧心肌细胞(myocardial cells,MCs)氧化应激损伤保护作用的影响。方法模拟缺血再灌注损伤,建立体外培养心肌细胞缺氧/复氧模型,分为12组,正常对照组,缺氧/复氧模型组,阳性对照组,处理组包括:高、中、低剂量乙酸乙酯萃取物+缺氧/复氧模型组;高、中、低剂量正丁醇萃取物+缺氧/复氧模型组;高、中、低剂量水萃取物+缺氧/复氧模型组。采用MTT法测定心肌细胞存活率;酶标仪检测细胞培养上清液中乳酸脱氢酶(LDH)水平及细胞内的丙二醛(MDA)含量和细胞内超氧化物歧化酶(SOD)的活力。结果与缺氧/复氧模型组比较,意大利牛舌草乙酸乙酯萃取物高剂量组、正丁醇萃取物高剂量组、水萃取物高剂量组心肌细胞存活率升高,LDH水平及MDA含量降低,SOD活力提高,差异有统计学意义(P<0.01)。结论意大利牛舌草乙酸乙酯萃取物、正丁醇萃取物、水萃取物对缺氧/复氧心肌细胞的损伤具有保护作用,其机制可能与平衡氧化应激产物和抗氧化应激的酶系统有关。
文摘目的建立大鼠肠温孵液中意大利牛舌草4种成分(芦丁、山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸)的一测多评方法(Quantitative Analysis of Multi-components by Single-marker,QAMS)。方法采用聚酰胺柱色谱对意大利牛舌草粗提物进行纯化。建立同时测定大鼠肠温孵液中意大利牛舌草提取物主要成分芦丁、山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸的高效液相色谱定量分析方法。以芦丁为内参物,测定大鼠肠温孵液中意大利牛舌草提取物主要成分芦丁与山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸的相对校正因子(Relative Correction Factor,RCF),利用RCF进行含量计算(计算值),并与外标法(External Standard Method,ESM)的测定结果(实测值)进行比较,对该方法进行可行性验证。结果采用ESM法测定8个批次的大鼠肠温孵液中意大利牛舌草提取物主要成分芦丁、山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸的平均含量分别为14.20、15.88、9.80、66.90 mg/g。在线性范围内,芦丁与山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸的RCF分别为0.983、1.101、0.843(RSD值均<2%)。利用RCF计算得山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸的平均含量分别为15.67、9.87、67.44 mg/g,两种方法的含量测定结果基本一致(相对偏差均<2%)。结论一测多评法简便、准确、可行,可用于大鼠肠温孵液中意大利牛舌草提取物山奈酚-3-O-芸香糖苷、水仙苷、迷迭香酸的含量测定。
