RESUMO
Bioactive metabolites in Codonopsis pilosula are of particular interest as an immunostimulant. Methyl jasmonate (MeJA) plays an important role in the elicitation of metabolite biosynthesis. Here, we explored the response of metabolites to MeJA elicitation in C. pilosula adventitious roots and multiple shoots. The results showed that the biomass, polysaccharide, and lobetyolin content of adventitious roots exhibited the highest increases with 100 µmol·L-1 MeJA at the 16th day of subculture, whereas the atractylenolide III (a terpenoid) content increased extremely with 50 µmol·L-1 MeJA treatment at the 7th day of subculture. In addition, the biomass and lobetyolin content significantly increased at the 4th day after treatment. Similarly, the polysaccharide and lobetyolin content increased in multiple shoots. Further identification of different metabolites responding to MeJA by ¹H-NMR showed an extremely significant increase of the lobetyolinin level, which coincided with lobetyolin. Accordingly, the precursor, fatty acids, showed a highly significant decrease in their levels. Furthermore, a significant increase in ß-d-fructose-butanol glycoside was detected, which was accompanied by a decrease in the sucrose level. Accordingly, the enzyme genes responsible for terpenoid and carbohydrate biosynthesis, CpUGPase, and CpPMK, were up regulated. In conclusion, MeJA promoted culture growth and accelerated bioactive metabolite accumulation by regulating the expression of the metabolite biosynthesis related genes, CpUGPase and CpPMK in C. pilosula.
Assuntos
Acetatos/farmacologia , Codonopsis/efeitos dos fármacos , Ciclopentanos/farmacologia , Regulação da Expressão Gênica de Plantas , Oxilipinas/farmacologia , Reguladores de Crescimento de Plantas/farmacologia , Proteínas de Plantas/genética , Biomassa , Codonopsis/genética , Codonopsis/crescimento & desenvolvimento , Codonopsis/metabolismo , Ácidos Graxos/biossíntese , Lactonas/metabolismo , Redes e Vias Metabólicas/efeitos dos fármacos , Redes e Vias Metabólicas/genética , Fosfotransferases (Aceptor do Grupo Fosfato)/genética , Fosfotransferases (Aceptor do Grupo Fosfato)/metabolismo , Proteínas de Plantas/metabolismo , Raízes de Plantas/efeitos dos fármacos , Raízes de Plantas/genética , Raízes de Plantas/crescimento & desenvolvimento , Raízes de Plantas/metabolismo , Brotos de Planta/efeitos dos fármacos , Brotos de Planta/genética , Brotos de Planta/crescimento & desenvolvimento , Brotos de Planta/metabolismo , Poli-Inos/metabolismo , Sesquiterpenos/metabolismo , UTP-Glucose-1-Fosfato Uridililtransferase/genética , UTP-Glucose-1-Fosfato Uridililtransferase/metabolismoRESUMO
The present study is to study the chemical constituents from ethanol extract of Psidium guajava leaves. The constituents were separated and purified by silica gel column chromaiographios over, macroporous resin D-101, Sephadex LH-20, and ODS. Six flavonoids compounds were isolated and identified as quercetin(1), quercetin-3-O-α-D-arabinopyranoside(2), quercetin-3-O-α-D-ribopyranoside(3), quercetin-3-O-ß-D-galactopyranoside(4), quercetin-3-O-α-D-glucopyranoside(5), and quercetin-3-O-α-D-xylpyranoside(6). The antioxidant effects of six flavonoids was evaluated by scavenging ability of DPPH, superoxide anion, ABTS·âº, and reducing effect of Fe³âº as well as total antioxidant capacity(FRAP). Vitamin C was used as positive control. The results indicated that six flavonoids exhibited significant antioxidant effects.
Assuntos
Antioxidantes/química , Flavonoides/química , Psidium/química , Compostos Fitoquímicos/análise , Folhas de Planta/química , Quercetina/químicaRESUMO
In this paper, the RP-HPLC specific chromatography was adopted, with DIKMA-C18 (4.6 mm x 250 mm, 5 µm) as the chromatographic column, with a gradient elution compose of acetonitrile and 0.1% phosphoric acid at flow rate of 0.8 mL · min(-1), the detection wavelength was 220 nm. The difference of the HPLC specific chromatograms between the Lu Dangshen and other different base sources and different producing area of Codonopsis Radix was compared, involved in the similarities and differences of the number and the relative peak area of characteristic peaks in the HPLC specific chromatograms. The HPLC specific chromatograms of Lu Dangshen was established and the relative retention times of seven peaks was determined, and the peaks of codonopyrrolidium B, syringin, lobetyolin, tangshenoside I and atractylenoide III were identified; The HPLC specific chromatograms of Lu Dangshen provided a method for scientific evaluation and effective control the quality of Lu Dangshen from Shanxi famous-region.
Assuntos
Cromatografia Líquida de Alta Pressão/métodos , Codonopsis/química , Medicamentos de Ervas Chinesas/análise , Raízes de Plantas/química , Glucosídeos/análise , Fenilpropionatos/análise , Controle de QualidadeRESUMO
Vascular endothelium plays an important role in the physiological homeostasis of blood vessels. Endothelial injury is considered to be implicated in the pathogenesis of many cardiovascular diseases, including atherosclerosis. Farrerol, a flavonoid considered to be the major bioactive component in a traditional Chinese herb, "Man-shan-hong", which is the dried leaves of Rhododendron dauricum L., displays many bioactive properties, including antibechic, antibacterial, anti-inflammatory, and the inhibition of vascular smooth muscle cell (VSMC) proliferation. In this study, the protective effects of farrerol on hydrogen peroxide (H2O2)-induced apoptosis in human endothelium-derived EA.hy926 cells were investigated. The results showed that farrerol significantly inhibited the loss of cell viability and enhanced superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities in H2O2-induced EA.hy926 cells. Meanwhile, farrerol inhibited H2O2-induced elevation in the levels of intracellular malondialdehyde and reactive oxygen species, as well as cell apoptosis. Furthermore, real time RT-PCR and Western blot analysis showed that farrerol significantly decreased the expression of Bax mRNA, Bax, cleaved caspase-3, and phosph-p38 MAPK, while increasing the exporession of Bcl-2 mRNA and Bcl-2 in H2O2-induced EA.hy926 cells. These results are the first demonstration that farrerol has protective effects against H2O2-induced apoptosis in EA.hy926 cells, and suggests that farrerol is a potential candidate for the intervention of endothelial-injury-associated cardiovascular diseases.
Assuntos
Antioxidantes/farmacologia , Apoptose/efeitos dos fármacos , Cromonas/farmacologia , Células Endoteliais/efeitos dos fármacos , Peróxido de Hidrogênio/toxicidade , Proteínas Reguladoras de Apoptose/genética , Proteínas Reguladoras de Apoptose/metabolismo , Linhagem Celular , Sobrevivência Celular/efeitos dos fármacos , Citoproteção , Relação Dose-Resposta a Droga , Células Endoteliais/metabolismo , Células Endoteliais/patologia , Regulação da Expressão Gênica , Glutationa Peroxidase/metabolismo , Humanos , Malondialdeído/metabolismo , Estresse Oxidativo/efeitos dos fármacos , RNA Mensageiro/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Superóxido Dismutase/metabolismoRESUMO
Codonopsis pilosula, a traditional Chinese medicinal and edible plant, contains several bioactive components. However, the biosynthetic mechanism is unclear because of the difficulties associated with functional gene analysis. Therefore, it is important to establish an efficient genetic transformation system for gene function analysis. In this study, we established a highly efficient Agrobacterium-mediated callus genetic transformation system for C. pilosula using stems as explants. After being pre-cultured for 3 days, the explants were infected with Agrobacterium tumefaciens strain GV3101 harboring pCAMBIA1381-35S::GUS at an OD600 value of 0.3 for 15 min, followed by co-cultivation on MS induction medium for 1 day and delayed cultivation on medium supplemented with 250 mg l-1 cefotaxime sodium for 12 days. The transformed calli were selected on screening medium supplemented with 250 mg l-1 cefotaxime sodium and 2.0 mg l-1 hygromycin and further confirmed by PCR amplification of the GUS gene and histochemical GUS assay. Based on the optimal protocol, the induction and transformation efficiency of calli reached a maximum of 91.07%. The establishment of a genetic transformation system for C. pilosula calli lays the foundation for the functional analysis of genes related to bioactive components through genetic engineering technology.
RESUMO
The vascular endothelium is important in the physiological homeostasis of blood vessels. Increasing evidence demonstrates that oxidative stressinduced endothelial damage is involved in the pathogenesis of several cardiovascular diseases, including atherosclerosis. Hyperoside, one of major active components from Apocynum venetum L. (LuoBuMa), which is a traditional Chinese herbal medicine commonly used for the prevention of cardiovascular diseases, exhibits diverse bioactivities, including antiinflammatory and antioxidant effects. In the present study, the protective effects of hyperoside against hydrogen peroxide (H2O2)induced apoptosis of human umbilical vein endothelial cells (HUVECs) were investigated. The results demonstrated that hyperoside significantly prevented the loss of cell viability, the increase of endothelial Ca2+ content and apoptosis in H2O2induced HUVECs. Additionally, reverse transcription-polymerase chain reaction and western blot analysis revealed that hyperoside significantly decreased the mRNA expression levels of Bcell lymphoma (Bcl)2 associated X protein (Bax), cleaved caspase3 and phosphorylatedp38, while increasing the mRNA expression of Bcl2 in H2O2induced HUVECs. The present findings suggested that hyperoside has protective effects against H2O2induced apoptosis in HUVECs and serves a key role in the prevention of cardiovascular diseases.
Assuntos
Antioxidantes/farmacologia , Células Endoteliais da Veia Umbilical Humana/efeitos dos fármacos , Células Endoteliais da Veia Umbilical Humana/metabolismo , Peróxido de Hidrogênio/farmacologia , Quercetina/análogos & derivados , Antioxidantes/química , Proteínas Reguladoras de Apoptose/genética , Proteínas Reguladoras de Apoptose/metabolismo , Cálcio/metabolismo , Caspase 3/metabolismo , Sobrevivência Celular/efeitos dos fármacos , Células Cultivadas , Regulação da Expressão Gênica/efeitos dos fármacos , Humanos , Proteínas Proto-Oncogênicas c-bcl-2/genética , Quercetina/química , Quercetina/farmacologia , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Proteína X Associada a bcl-2/genética , Proteína X Associada a bcl-2/metabolismo , Proteínas Quinases p38 Ativadas por Mitógeno/metabolismoRESUMO
Endothelial injury has been implicated in the pathogenesis of many cardiovascular diseases, including thrombotic disorders. Hyperin (quercetin-3-O-galactoside), a flavonoid compound and major bioactive component of the medicinal herb Apocynum venetum L., is commonly used to prevent endothelium dysfunction. However, its mode of action remains unclear. To the best of our knowledge, we have for the first time investigated the protective effect hyperin exerts against H2O2-induced injury in human endothelium-derived EA.hy926 cells using isobaric tags for relative and absolute quantitation (iTRAQ)based quantitative proteomic analysis. The results showed that H2O2 exposure induced alterations in the expression of 250 proteins in the cells. We noted that the expression of 52 proteins associated with processes such as cell apoptosis, cell cycle and cytoskeleton organization, was restored by hyperin treatment. Of the proteins differentially regulated following H2O2 stress, the anti-apoptotic protein, myeloid cell leukemia-1 (Mcl-1), and the pro-apoptotic protein, BH3-interacting domain death agonist (Bid), exhibited marked changes in expression. Hyperin increased Mcl-1 expression and decreased that of Bid in a dose-dependent manner. In addition, flow cytometric analysis and western blot analysis of the apoptosis-related proteins, truncated BID (tBid), cleaved caspase-3, cleaved caspase-9, Fas, FasL and caspase-8, demonstrated that the rate of apoptosis and the pro-apoptotic protein levels were decreased by hyperin pretreatment. In the present study we demonstrate that hyperin effectively prevents H2O2induced cell injury by regulating the Mcl1 and Bid-mediated antiapoptotic mechanism, suggesting that hyperin is a potential candidate for use in the treatment of thrombotic diseases.
Assuntos
Apoptose/efeitos dos fármacos , Proteína Agonista de Morte Celular de Domínio Interatuante com BH3/metabolismo , Endotélio/efeitos dos fármacos , Proteína de Sequência 1 de Leucemia de Células Mieloides/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Substâncias Protetoras/farmacologia , Quercetina/análogos & derivados , Apocynum/química , Caspase 3/metabolismo , Caspase 8/metabolismo , Caspase 9/metabolismo , Pontos de Checagem do Ciclo Celular/efeitos dos fármacos , Linhagem Celular , Endotélio/citologia , Endotélio/metabolismo , Humanos , Peróxido de Hidrogênio/metabolismo , Substâncias Protetoras/química , Proteômica , Quercetina/química , Quercetina/farmacologiaRESUMO
Four new limonoids (1-4), together with five known limonoids (5-9), were isolated from the fruits of Melia toosendan. Their structures were elucidated based on extensive spectroscopic analyses (1D- and 2D-NMR, HRESIMS, IR, [α](D)). The isolated compounds were evaluated for their neurite outgrowth-promoting activities. Compounds 2 and 6 significantly enhanced NGF-mediated neurite outgrowth in PC12 cells at concentrations ranging from 0.1 to 50.0 µM.
Assuntos
Limoninas/farmacologia , Melia/química , Fator de Crescimento Neural/metabolismo , Extratos Vegetais/farmacologia , Animais , Frutas , Limoninas/química , Limoninas/isolamento & purificação , Estrutura Molecular , Neuritos/efeitos dos fármacos , Células PC12 , Extratos Vegetais/química , RatosRESUMO
A new glycoside compound (1) was isolated from the starfish Asteria amurensis Lutken. The structure for compound 1 was identified as 1-O-{beta-D-quinovopyranosyl-(1-2)-beta-D-fucopyranosyl-(1-4)-[beta-D-fucopyranosyl(1-2)] beta-D-quinovopyranosyl}-butanol by extensive NMR experiments as well as chemical evidence. The effects of compound 1 on UMR106 cell proliferation were screened by MTT assay. The results indicate that compound 1 (0.01-100 microM) significantly promotes osteoblastic proliferation.
Assuntos
Proliferação de Células/efeitos dos fármacos , Glicosídeos/farmacologia , Osteoblastos/efeitos dos fármacos , Estrelas-do-Mar/química , Animais , Linhagem Celular , Glicosídeos/química , Estrutura MolecularRESUMO
Two new sulfated steroidal compounds (1 and 2), along with three known steroidal saponins (3, 4, and 5) were isolated from the starfish Asterias amurensis Lutken. The structures of new compounds were elucidated as 3beta-O-sulfated-cholest-5-ene-7alpha-ol (1) and (E) 25-O-beta-d-xylopyranosyl-26, 27-dinor-24(S)-methyl-22-ene-15alpha-O-sulfated-5alpha-cholest-3beta,6alpha-ol (2) by extensive NMR experiments and chemical evidence. Their effects on UMR106 cell proliferation were screened by MTT method. The results indicated that compounds 2 and 2a (0.01-100 microM) significantly promoted the osteoblastic proliferation. The initial structure-activity relationship analysis suggests that the sugar moiety is the necessary group for the activity.