目的:探讨人参皂苷素Rb1预处理对大鼠急性心肌缺血PI3K-Akt-e NOS信号通路的影响。方法:应用异丙肾上腺素建立SD大鼠急性心肌缺血模型,实验分为空白对照组、模型组、Rb1低剂量组(10 mg/kg)、Rb1高剂量组(20 mg/kg),HE染色法观察各组心...目的:探讨人参皂苷素Rb1预处理对大鼠急性心肌缺血PI3K-Akt-e NOS信号通路的影响。方法:应用异丙肾上腺素建立SD大鼠急性心肌缺血模型,实验分为空白对照组、模型组、Rb1低剂量组(10 mg/kg)、Rb1高剂量组(20 mg/kg),HE染色法观察各组心肌形态变化;MOOR激光血流成像系统观测各组大鼠心脏表面血流值,以此作为心肌缺血的指标;ELISA法测定各组大鼠血清中NO的含量;RT-PCR法检测各组大鼠心肌e NOS m RNA的表达变化;Western blot方法检测各组大鼠心肌PI3K、AKT、P-AKT蛋白的表达变化。结果:与空白对照组比较,心肌缺血模型组心肌细胞紊乱;大鼠心脏表面平均血流量明显下降,血清NO、心肌e NOS m RNA含量显著降低,蛋白PI3K、AKT、P-AKT表达降低;给予人参皂苷素Rb1干预后,心肌细胞结构有所改善,心肌表面平均血流有显著提升(P<0.05);血清NO、心肌e NOS m RNA含量显著提升(P<0.05);蛋白PI3K、AKT、P-AKT表达升高(P<0.05或P<0.01)。结论:PI3K-Akt-e NOS信号转导通路介导了人参皂苷素Rb1对心肌缺血的保护作用。展开更多
[Objective] This study aimed to identify red pigment of Panax notoginseng fruits and explore the correlation between pigment content and total saponins of the fruits. [Method] The red pigment of Panax notoginseng frui...[Objective] This study aimed to identify red pigment of Panax notoginseng fruits and explore the correlation between pigment content and total saponins of the fruits. [Method] The red pigment of Panax notoginseng fruits was preliminarily identi- fied with specific color reactions and UV-vis spectra, and the contents of the pigment and total saponins were determined via spectrophotometry. [Result] The red hues of the fruits were contributed by anthocyanins and/or the anthocyanidins. The contents of anthocyanins and total saponins of the fruits both decreased along with thinning of the red hues. The content difference of the anthocyanins in fruits with different red hues reached extremely significant level, but that of total saponins just reached significant level. [Conclusion] The red pigment of P. notoginseng fruits is anthocyanins which are of extremely significant positive correlation with total saponins in contents.展开更多
[Objective] The aim of this study was to investigate the content changes and their correlations of the photosynthetic pigment,phenols,including total phenols,total flavonoids and anthocyanins,and total saponins of the...[Objective] The aim of this study was to investigate the content changes and their correlations of the photosynthetic pigment,phenols,including total phenols,total flavonoids and anthocyanins,and total saponins of the one-year-old P.notoginseng plants under supplemental UV-B stress in fields.[Method] The one-year-old plants were irradiated by UV-B in field for 1 min per day,and the plants under the UV-B lamp were regarded as a circle center,achieving an annular leaf-sampling.The photosynthetic pigment,phenols and total saponins of the leaves were determined spectrophotometrically.[Result] With the increase of sampling radius,the supplemental UV-B intensity decreased significantly,the contents of chlorophyll （Chl） a,Chl b,Chl （a＋b）,carotenoid （Car） and total photosynthetic pigment （Chl＋Car） of the leaves increased extremely significantly,the Chl a/b and total phenol content （TPC） decreased extremely significantly,but the Chl （a＋b）/Car changes were not significant.The contents of total flavonoids,anthocyanins and saponins all increased due to the increasing of UV-B,displaying dose effects.The UV-B intensity was positively correlated with the Chl a/b,and negatively with the Chl a,Chl b,Chl （a＋ b）,Car and （Chl＋Car） contents; and the two of TPC,total flavonoid content （TFC）,total anthocyanin content （TAC） and total saponin content （TSC） were positively correlated,all reaching extremely significant level.The UV-B intensity was positively and significantly correlated with the total flavonoid content （TFC）,negatively and significantly with the Chl （a＋b）/Car,and positively and insignificantly with the TPC,TAC and TSC.[Conclusion] For one-year-old plants of P.notoginseng,UV-B can decrease the contents of the Chl a,Chl b,Chl （a＋b）,Car and （Chl＋Car） and increase the Chl a/b and TPC,and,furthermore,induce the increases of the TFC,TAC and TSC in a dose-dependent manner.However,UV-B can hardly change the Chl （a＋b）/Car.The supplemental UV-B of well-suited dose might be one of the effective measures to improve the TSC of P.notoginseng.展开更多
A new pentacyclic triterpenoid saponin, named lucyoside Q, was isolated from the leaves of Luffa cylindrica. Its structure was established as 21 β hydroxyloleanolic acid 28 O β D glucopyranoside by means of th...A new pentacyclic triterpenoid saponin, named lucyoside Q, was isolated from the leaves of Luffa cylindrica. Its structure was established as 21 β hydroxyloleanolic acid 28 O β D glucopyranoside by means of the spectral evidence and chemical methods.展开更多
To investigate the inhibiting effect of β-Aescin on nuclear factor-κB (NF-κB) activation and the expression of tumor necrosis factor-α (TNF-α) protein after traumatic brain injury (TBI) in the rat brain, 62 SD ra...To investigate the inhibiting effect of β-Aescin on nuclear factor-κB (NF-κB) activation and the expression of tumor necrosis factor-α (TNF-α) protein after traumatic brain injury (TBI) in the rat brain, 62 SD rats were subjected to lateral cortical impact injury caused by a free-falling object and divided randomly into four groups: (1) sham operated (Group A); (2) injured (Group B); (3) β-Aescin treatment (Group C); (4) pyrrolidine dithocarbamate (PDTC) treatment (Group D). β-Aescin was administered in Group C and PDTC treated in Group D immediately after injury. A series of brain samples were obtained directly 6h, 24 h and 3 d respectively after trauma in four groups. NF-κB activation was examined by Electrophoretic Mobility Shift Assay (EMSA); the levels of TNF-α protein were measured by radio-immunoassay (RIA); the water content of rat brain was measured and pathomorphological observation was carried out. NF-κB activation, the levels of TNF-α protein and the water content of rat brain were significantly increased (P＜0.01) following TBI in rats. Compared with Group B, NF-κB activation (P＜0.01), the levels of TNF-α protein (P＜0.01) and the water content of brain (P＜0.05) began to decrease obviously after injury in Groups C and D.β-Aescin could dramatically inhibit NF-κB activation and the expression of TNF-α protein in the rat brain, alleviate rat brain edema, and that could partially be the molecular mechanism by which β-Aescin attenuates traumatic brain edema.展开更多
文摘目的探讨电针合用人参皂苷素Rb1复合疗法对大鼠急性心肌缺血心脏表面微循环和血清酶活性的影响。方法 50只SPF级SD大鼠随机分为空白组、模型组、葛根素对照组、皂苷素Rb1组、Rb1+电针组,每组10只。空白组、模型组分别给予等量的生理盐水,其余各组均腹腔注射给药(1 m L/100 g体质量)。连续给药5 d,每天1次。开始给药后的第4天和第5天,除空白组外,其余各组连续2次皮下多点注射给予ISO30 mg/kg,空白组给予等量生理盐水,给药体积均为1 m L/100 g体质量,此外Rb1+电针组每日给予电针内关穴刺激。采用激光散斑血流成像系统检测心脏表面微循环,ELISA检测血清中乳酸脱氢酶(LDH)、肌酸激酶(CK)、超氧化物歧化酶(SOD)和丙二醛(MDA)的含量。结果与模型组相比,皂苷素Rb1组和Rb1+电针组(15 mg/kg)均能显著增强心脏表面血流微循环(P<0.05 vs模型),显著降低血清中LDH、CK的活性及MDA的含量,升高血清中SOD的活性(P<0.05 vs模型),同时与Rb1组相比,Rb1+电针组具有一定的增强作用(P<0.05 vs Rb1组)。结论电针刺激合用人参皂苷素Rb1复合疗法并没有产生拮抗作用,在治疗中相对于单一疗法具有一定的增强效果,对大鼠急性心肌缺血有一定的保护作用。
文摘目的:探讨人参皂苷素Rb1预处理对大鼠急性心肌缺血PI3K-Akt-e NOS信号通路的影响。方法:应用异丙肾上腺素建立SD大鼠急性心肌缺血模型,实验分为空白对照组、模型组、Rb1低剂量组(10 mg/kg)、Rb1高剂量组(20 mg/kg),HE染色法观察各组心肌形态变化;MOOR激光血流成像系统观测各组大鼠心脏表面血流值,以此作为心肌缺血的指标;ELISA法测定各组大鼠血清中NO的含量;RT-PCR法检测各组大鼠心肌e NOS m RNA的表达变化;Western blot方法检测各组大鼠心肌PI3K、AKT、P-AKT蛋白的表达变化。结果:与空白对照组比较,心肌缺血模型组心肌细胞紊乱;大鼠心脏表面平均血流量明显下降,血清NO、心肌e NOS m RNA含量显著降低,蛋白PI3K、AKT、P-AKT表达降低;给予人参皂苷素Rb1干预后,心肌细胞结构有所改善,心肌表面平均血流有显著提升(P<0.05);血清NO、心肌e NOS m RNA含量显著提升(P<0.05);蛋白PI3K、AKT、P-AKT表达升高(P<0.05或P<0.01)。结论:PI3K-Akt-e NOS信号转导通路介导了人参皂苷素Rb1对心肌缺血的保护作用。
文摘目的:研究人参皂苷Rb1对异丙肾上腺素(ISO)致大鼠急性心肌缺血的影响。方法:75只SPF级SD大鼠随机分为正常组,模型组,葛根素组(10 mg·kg^(-1)),Rb_1低,高剂量组(10,20 mg·kg^(-1)),每组15只。正常组、模型组分别给予等量的生理盐水,各组均ip给药0.01 m L·g^(-1)体重。连续给药5 d,每天1次。开始给药后的第4天和第5天,除正常组外,其余各组连续2次皮下多点注射给予ISO 30 mg·kg^(-1),正常组给予等量生理盐水,给药体积均为0.01 m L·g^(-1)。观察人参皂苷Rb_1对大鼠心电图的影响,激光散斑检测心脏表面微循环,ELISA检测血清中乳酸脱氢酶(LDH),肌酸激酶(CK),谷胱甘肽合成酶(GSH),一氧化氮(NO),超氧化物歧化酶(SOD)和丙二醛(MDA)的含量。结果:与正常组比较,模型组大鼠心率明显升高,抗心电图ST段明显降低,心脏表面血流微循环明显降低,血清中LDH,CK的活性及MDA的含量明显升高,血清中SOD的活性及GSH,NO的含量明显降低(P<0.01,P<0.05);与模型组比较,人参皂苷素Rb_1能有效降低心率,对抗心电图ST段升高,同时能显著增强心脏表面血流微循环,显著降低血清中LDH,CK的活性及MDA的含量,升高血清中SOD的活性及GSH,NO的含量(P<0.01,P<0.05),同时减轻心肌损伤的程度。结论:人参皂苷素Rb_1对ISO所致大鼠急性心肌缺血有一定的保护作用,其可能与抗脂质过氧化,修复损伤有关。
基金Supported by the National Natural Science Foundation of China(No.31060045,31260091)~~
文摘[Objective] This study aimed to identify red pigment of Panax notoginseng fruits and explore the correlation between pigment content and total saponins of the fruits. [Method] The red pigment of Panax notoginseng fruits was preliminarily identi- fied with specific color reactions and UV-vis spectra, and the contents of the pigment and total saponins were determined via spectrophotometry. [Result] The red hues of the fruits were contributed by anthocyanins and/or the anthocyanidins. The contents of anthocyanins and total saponins of the fruits both decreased along with thinning of the red hues. The content difference of the anthocyanins in fruits with different red hues reached extremely significant level, but that of total saponins just reached significant level. [Conclusion] The red pigment of P. notoginseng fruits is anthocyanins which are of extremely significant positive correlation with total saponins in contents.
基金Supported by the National Natural Science Foundation of China(31060045,31260091)~~
文摘[Objective] The aim of this study was to investigate the content changes and their correlations of the photosynthetic pigment,phenols,including total phenols,total flavonoids and anthocyanins,and total saponins of the one-year-old P.notoginseng plants under supplemental UV-B stress in fields.[Method] The one-year-old plants were irradiated by UV-B in field for 1 min per day,and the plants under the UV-B lamp were regarded as a circle center,achieving an annular leaf-sampling.The photosynthetic pigment,phenols and total saponins of the leaves were determined spectrophotometrically.[Result] With the increase of sampling radius,the supplemental UV-B intensity decreased significantly,the contents of chlorophyll （Chl） a,Chl b,Chl （a＋b）,carotenoid （Car） and total photosynthetic pigment （Chl＋Car） of the leaves increased extremely significantly,the Chl a/b and total phenol content （TPC） decreased extremely significantly,but the Chl （a＋b）/Car changes were not significant.The contents of total flavonoids,anthocyanins and saponins all increased due to the increasing of UV-B,displaying dose effects.The UV-B intensity was positively correlated with the Chl a/b,and negatively with the Chl a,Chl b,Chl （a＋ b）,Car and （Chl＋Car） contents; and the two of TPC,total flavonoid content （TFC）,total anthocyanin content （TAC） and total saponin content （TSC） were positively correlated,all reaching extremely significant level.The UV-B intensity was positively and significantly correlated with the total flavonoid content （TFC）,negatively and significantly with the Chl （a＋b）/Car,and positively and insignificantly with the TPC,TAC and TSC.[Conclusion] For one-year-old plants of P.notoginseng,UV-B can decrease the contents of the Chl a,Chl b,Chl （a＋b）,Car and （Chl＋Car） and increase the Chl a/b and TPC,and,furthermore,induce the increases of the TFC,TAC and TSC in a dose-dependent manner.However,UV-B can hardly change the Chl （a＋b）/Car.The supplemental UV-B of well-suited dose might be one of the effective measures to improve the TSC of P.notoginseng.
文摘A new pentacyclic triterpenoid saponin, named lucyoside Q, was isolated from the leaves of Luffa cylindrica. Its structure was established as 21 β hydroxyloleanolic acid 28 O β D glucopyranoside by means of the spectral evidence and chemical methods.
文摘To investigate the inhibiting effect of β-Aescin on nuclear factor-κB (NF-κB) activation and the expression of tumor necrosis factor-α (TNF-α) protein after traumatic brain injury (TBI) in the rat brain, 62 SD rats were subjected to lateral cortical impact injury caused by a free-falling object and divided randomly into four groups: (1) sham operated (Group A); (2) injured (Group B); (3) β-Aescin treatment (Group C); (4) pyrrolidine dithocarbamate (PDTC) treatment (Group D). β-Aescin was administered in Group C and PDTC treated in Group D immediately after injury. A series of brain samples were obtained directly 6h, 24 h and 3 d respectively after trauma in four groups. NF-κB activation was examined by Electrophoretic Mobility Shift Assay (EMSA); the levels of TNF-α protein were measured by radio-immunoassay (RIA); the water content of rat brain was measured and pathomorphological observation was carried out. NF-κB activation, the levels of TNF-α protein and the water content of rat brain were significantly increased (P＜0.01) following TBI in rats. Compared with Group B, NF-κB activation (P＜0.01), the levels of TNF-α protein (P＜0.01) and the water content of brain (P＜0.05) began to decrease obviously after injury in Groups C and D.β-Aescin could dramatically inhibit NF-κB activation and the expression of TNF-α protein in the rat brain, alleviate rat brain edema, and that could partially be the molecular mechanism by which β-Aescin attenuates traumatic brain edema.
