Background:Gelsemium elegans Benth(G.elegans)is a poisonous perennial evergreen vine plant that has been applied in livestock production and veterinary clinical practice.Early studies found that the toxicity of G.eleg...Background:Gelsemium elegans Benth(G.elegans)is a poisonous perennial evergreen vine plant that has been applied in livestock production and veterinary clinical practice.Early studies found that the toxicity of G.elegans showed significant gender differences in rats,but the underlying reasons for this difference are still not well understood.Methods:In order to explore whether the gender differences in the toxicity of G.elegans are related to pharmacokinetic differences,based on the previous pharmacokinetic study of multiple components of G.elegans in male rats,this study used HPLC-MS/MS method established in the laboratory to conduct a pharmacokinetic study of multiple alkaloids in the plasma of female rats after a single gavage administration of G.elegans(dose of 0.1 g/kg).Results:Through detection,17 alkaloid components in the plasma of female rats were identified,and the pharmacokinetic parameters of 11 of these alkaloids were calculated.We find that in female rats.The T_(max)values were generally less than 0.5 h,and the T_(1/2)values exceeded 3 h,with the longest reaching up to 32.80 h half elimination time.Additionally,the C_(max)and AUC results indicated that female rats had generally higher absorption and exposure levels for most alkaloids.Conclusion:These results suggest that the reason for the differences in the toxicology of G.elegans may be related to the absorption and exposure of gelsemidine-type alkaloids in animals.展开更多
Two new benzofuran lignan glycosides, gelsemiunoside A and B, were isolated from the whole plant of Gelsemium elegans Benth. Their structures were elucidated on the basis of spectroscopic evidence. Furthermore, gelsem...Two new benzofuran lignan glycosides, gelsemiunoside A and B, were isolated from the whole plant of Gelsemium elegans Benth. Their structures were elucidated on the basis of spectroscopic evidence. Furthermore, gelsemiunoside A and B were shown a potent cytotoxic activity by suppressing the proliferation of A375-S2 cells.展开更多
The modified Hofmann degradation of koumine(1) has proved abortive. The struture and stereochemistry of the main product(3) were deduced by spectral methods and confirmed by X-ray diffration analysis. From the roots o...The modified Hofmann degradation of koumine(1) has proved abortive. The struture and stereochemistry of the main product(3) were deduced by spectral methods and confirmed by X-ray diffration analysis. From the roots of Gelsemium elegans, dihydrokounine was first isolated as a natural product.展开更多
Objective: To develop a powerful integrated strategy based on liquid chromatography coupled with mass spectrometry(LC-MS) systems for the comprehensive characterization and quantification of multiple components of her...Objective: To develop a powerful integrated strategy based on liquid chromatography coupled with mass spectrometry(LC-MS) systems for the comprehensive characterization and quantification of multiple components of herbal medicines.Methods: Firstly, different mobile phase additives, analysis time, and MS acquisition modes were orthogonally tested with liquid chromatography coupled with quadrupole time-of-flight mass spectrometry(LC-QTOF/MS) in order to detect as many components of Gelsemium elegans as possible with high peak intensity. Secondly, several data mining strategies, including database searching, diagnostic ion filtering and neutral loss filtering, were utilized to perform chemical profiling. Subsequently, this study focused on the quantification and validation of the performance of a liquid chromatography-triple mass spectrometry(LC-Qq Q/MS) assay based on derivative multiple reaction monitoring(De MRM).Results: A total of 147 components from G. elegans were characterized, among them 116 nontarget components were reported for the first time. A sensitive and reproducible LC-Qq Q/MS method was successfully developed and validated for the simultaneous relative quantification of 41 components of G. elegans.This LC-Qq Q/MS method was then applied to compare the contents of components in the roots, stems and leaves.Conclusion: The present integrated strategy would significantly contribute to chemical studies on herbal medicine, and its utility could be extended to other research fields, such as metabolomics, quality control,and pharmacokinetics.展开更多
目的探讨胆汁制钩吻总碱(胆钩吻总碱)体外抗肿瘤效果,旨在为钩吻减毒后存效的研究提供科学依据。方法通过CCK-8检测观察胆钩吻总碱对人结肠HCT-116细胞、人神经胶质瘤U87细胞、人肝癌HepG2细胞、人肺癌A549细胞的增殖作用,进一步以结肠...目的探讨胆汁制钩吻总碱(胆钩吻总碱)体外抗肿瘤效果,旨在为钩吻减毒后存效的研究提供科学依据。方法通过CCK-8检测观察胆钩吻总碱对人结肠HCT-116细胞、人神经胶质瘤U87细胞、人肝癌HepG2细胞、人肺癌A549细胞的增殖作用,进一步以结肠癌HCT-116为研究对象,以不同浓度胆钩吻总碱(50、100、200μg·mL-1)干预HCT-116细胞,通过流式细胞技术检测其对细胞周期阻滞的影响;Annexin V FITC/PI流式细胞术检测HCT-116细胞凋亡情况;进一步从蛋白水平检测凋亡相关蛋白表达。结果在钩吻总生物碱IC 50浓度下,胆钩吻总碱对U87、A549、HepG2、HCT-116肿瘤细胞的增殖抑制率均高于钩吻总生物碱组,并且各组之间的差异具有统计学意义(P<0.01)。与空白组相比,不同浓度的胆钩吻总碱处理(50、100、200μg·mL-1)可有效降低HCT-116细胞的集落形成,并将细胞周期阻滞在G 2/M期。胆钩吻总碱还能引发结肠癌HCT-116细胞的晚期凋亡,并对凋亡相关蛋白Bax、Bcl-2、caspase-3起到调控作用。结论胆钩吻总碱可以通过调控结肠癌HCT-116细胞周期和凋亡相关蛋白的表达来抑制其增殖。展开更多
基金supported by the National Natural Science Foundation of China(No.31972737).
文摘Background:Gelsemium elegans Benth(G.elegans)is a poisonous perennial evergreen vine plant that has been applied in livestock production and veterinary clinical practice.Early studies found that the toxicity of G.elegans showed significant gender differences in rats,but the underlying reasons for this difference are still not well understood.Methods:In order to explore whether the gender differences in the toxicity of G.elegans are related to pharmacokinetic differences,based on the previous pharmacokinetic study of multiple components of G.elegans in male rats,this study used HPLC-MS/MS method established in the laboratory to conduct a pharmacokinetic study of multiple alkaloids in the plasma of female rats after a single gavage administration of G.elegans(dose of 0.1 g/kg).Results:Through detection,17 alkaloid components in the plasma of female rats were identified,and the pharmacokinetic parameters of 11 of these alkaloids were calculated.We find that in female rats.The T_(max)values were generally less than 0.5 h,and the T_(1/2)values exceeded 3 h,with the longest reaching up to 32.80 h half elimination time.Additionally,the C_(max)and AUC results indicated that female rats had generally higher absorption and exposure levels for most alkaloids.Conclusion:These results suggest that the reason for the differences in the toxicology of G.elegans may be related to the absorption and exposure of gelsemidine-type alkaloids in animals.
基金sponsored by the Scientific Research Foundation for the doctoral Scholars (Q.C.Zhao,No.20031040),Liaoning,China.
文摘Two new benzofuran lignan glycosides, gelsemiunoside A and B, were isolated from the whole plant of Gelsemium elegans Benth. Their structures were elucidated on the basis of spectroscopic evidence. Furthermore, gelsemiunoside A and B were shown a potent cytotoxic activity by suppressing the proliferation of A375-S2 cells.
文摘The modified Hofmann degradation of koumine(1) has proved abortive. The struture and stereochemistry of the main product(3) were deduced by spectral methods and confirmed by X-ray diffration analysis. From the roots of Gelsemium elegans, dihydrokounine was first isolated as a natural product.
基金supported by National Key R&D Program of Intergovernmental Key Projects (Grant No: 2018YFE0101700)National Natural Science Foundation of China (Grant No. 31972737)。
文摘Objective: To develop a powerful integrated strategy based on liquid chromatography coupled with mass spectrometry(LC-MS) systems for the comprehensive characterization and quantification of multiple components of herbal medicines.Methods: Firstly, different mobile phase additives, analysis time, and MS acquisition modes were orthogonally tested with liquid chromatography coupled with quadrupole time-of-flight mass spectrometry(LC-QTOF/MS) in order to detect as many components of Gelsemium elegans as possible with high peak intensity. Secondly, several data mining strategies, including database searching, diagnostic ion filtering and neutral loss filtering, were utilized to perform chemical profiling. Subsequently, this study focused on the quantification and validation of the performance of a liquid chromatography-triple mass spectrometry(LC-Qq Q/MS) assay based on derivative multiple reaction monitoring(De MRM).Results: A total of 147 components from G. elegans were characterized, among them 116 nontarget components were reported for the first time. A sensitive and reproducible LC-Qq Q/MS method was successfully developed and validated for the simultaneous relative quantification of 41 components of G. elegans.This LC-Qq Q/MS method was then applied to compare the contents of components in the roots, stems and leaves.Conclusion: The present integrated strategy would significantly contribute to chemical studies on herbal medicine, and its utility could be extended to other research fields, such as metabolomics, quality control,and pharmacokinetics.
文摘目的探讨胆汁制钩吻总碱(胆钩吻总碱)体外抗肿瘤效果,旨在为钩吻减毒后存效的研究提供科学依据。方法通过CCK-8检测观察胆钩吻总碱对人结肠HCT-116细胞、人神经胶质瘤U87细胞、人肝癌HepG2细胞、人肺癌A549细胞的增殖作用,进一步以结肠癌HCT-116为研究对象,以不同浓度胆钩吻总碱(50、100、200μg·mL-1)干预HCT-116细胞,通过流式细胞技术检测其对细胞周期阻滞的影响;Annexin V FITC/PI流式细胞术检测HCT-116细胞凋亡情况;进一步从蛋白水平检测凋亡相关蛋白表达。结果在钩吻总生物碱IC 50浓度下,胆钩吻总碱对U87、A549、HepG2、HCT-116肿瘤细胞的增殖抑制率均高于钩吻总生物碱组,并且各组之间的差异具有统计学意义(P<0.01)。与空白组相比,不同浓度的胆钩吻总碱处理(50、100、200μg·mL-1)可有效降低HCT-116细胞的集落形成,并将细胞周期阻滞在G 2/M期。胆钩吻总碱还能引发结肠癌HCT-116细胞的晚期凋亡,并对凋亡相关蛋白Bax、Bcl-2、caspase-3起到调控作用。结论胆钩吻总碱可以通过调控结肠癌HCT-116细胞周期和凋亡相关蛋白的表达来抑制其增殖。
