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1.
Chinese Journal of Natural Medicines (English Ed.) ; (6): 127-135, 2023.
Artículo en Inglés | WPRIM | ID: wpr-971667

RESUMEN

Stigmasterol is a plant sterol with anti-apoptotic, anti-oxidative and anti-inflammatory effect through multiple mechanisms. In this study, we further assessed whether it exerts protective effect on human brain microvessel endothelial cells (HBMECs) against ischemia-reperfusion injury and explored the underlying mechanisms. HBMECs were used to establish an in vitro oxygen and glucose deprivation/reperfusion (OGD/R) model, while a middle cerebral artery occlusion (MCAO) model of rats were constructed. The interaction between stigmasterol and EPHA2 was detected by surface plasmon resonance (SPR) and cellular thermal shift assay (CETSA). The results showed that 10 μmol·L-1 stigmasterol significantly protected cell viability, alleviated the loss of tight junction proteins and attenuated the blood-brain barrier (BBB) damage induced by OGD/R in thein vitro model. Subsequent molecular docking showed that stigmasterol might interact with EPHA2 at multiple sites, including T692, a critical gatekeep residue of this receptor. Exogenous ephrin-A1 (an EPHA2 ligand) exacerbated OGD/R-induced EPHA2 phosphorylation at S897, facilitated ZO-1/claudin-5 loss, and promoted BBB leakage in vitro, which were significantly attenuated after stigmasterol treatment. The rat MCAO model confirmed these protective effects in vivo. In summary, these findings suggest that stigmasterol protects HBMECs against ischemia-reperfusion injury by maintaining cell viability, reducing the loss of tight junction proteins, and attenuating the BBB damage. These protective effects are at least meditated by its interaction with EPHA2 and inhibitory effect on EPHA2 phosphorylation.


Asunto(s)
Humanos , Animales , Ratas , Estigmasterol , Fosforilación , Células Endoteliales , Simulación del Acoplamiento Molecular , Daño por Reperfusión , Barrera Hematoencefálica , Glucosa , Microvasos , Oxígeno
2.
Semina cienc. biol. saude ; 41(1): 43-54, jan./jun.2020. Tab, Ilus
Artículo en Portugués | LILACS | ID: biblio-1224582

RESUMEN

O interesse de pesquisadores e da população geral é bastante evidente, e tem crescido bastante na atualidade, no uso de plantas medicinais. A espécie de interesse deste trabalho, a Sphagneticola trilobata Pruski é uma planta herbácea pertencente à família Asteraceae. Alguns relatos têm mostrado a presença de diversos constituintes químicos nesta planta, principalmente diterpenos. O presente trabalho realizou o estudo fitoquímico de uma fração do extrato hexânico, devido ao baixo rendimento da fração diclorometânica, através da utilização de diversos métodos cromatográficos, na qual isolouse o fitoesterol estigmasterol. Este composto foi confirmado por meio de dados espectroscópicos e de literaturas, e o isolamento de compostos desta classe de substâncias indicam uma nova vertente para o uso medicinal desta planta como um futuro hipocolesterolêmico. Para isto, estudos serão direcionados para o isolamento de fitoesteróis, com posterior realização de ensaios biológicos (AU)


The interest of researchers and the general population is quite evident, and has grown considerably today, in the use of medicinal plants. The species of interest in this work, Sphagneticola trilobata Pruski is a herbaceous plant, belonging to Asteraceae family. Some reports have shown the presence of several chemical constituents in this plant, mainly diterpenes. The present work carried out the phytochemical study of a fraction of the hexane extract, due to the low yield of the dichloromethane fraction, by several chromatographic methods, in which the phytosterol estigmasterol was isolated. This compound has been confirmed by means of spectroscopic and literature data, and the isolation of compounds of this class of substances indicates a new strand for the medicinal use of this plant as a hypocholesterolemic future. For this, studies will be directed to the isolation of phytosterols, with subsequent biological tests (AU)


Asunto(s)
Plantas Medicinales/efectos adversos , Investigadores , Estigmasterol , Asteraceae , Fitosteroles , Métodos
3.
Braz. arch. biol. technol ; 63: e20190216, 2020. tab, graf
Artículo en Inglés | LILACS | ID: biblio-1132175

RESUMEN

Abstract In the last years phytosterols, natural components of plants, have received more attention due to association of their consumption with reducing risk of cardiovascular diseases and cancer. There are several scientific studies about phytosterols in vegetable oils, but they are scarce in unconventional oils. The objective of this research was evaluating the content of phytosterols (β-sitosterol, stigmasterol and campesterol) in vegetable oils sold in São Paulo city, in Brazil. The analysis included cold alkaline saponification, derivatization with hexamethyldisilazane and trimethylchlorosilane reagents, and quantification by gas chromatography using flame ionization detection and internal standardization. The quality control parameters indicated that the method was suitable for analysis. Total sterols were between 272.3 mg kg-1 (coconut oil) to 6169.7 mg kg-1 (evening primrose oil). β-sitosterol was the component found in higher concentrations and evening primrose oil was the most representative in quantity of phytosterols.


Asunto(s)
Fitosteroles/análisis , Aceites de Plantas/análisis , Sitoesteroles/análisis , Estigmasterol/análisis , Aceites de Plantas/clasificación , Brasil , Cromatografía de Gases , Lino , Carthamus tinctorius , Aceite de Palma/análisis
4.
Acta Physiologica Sinica ; (6): 55-60, 2017.
Artículo en Chino | WPRIM | ID: wpr-331593

RESUMEN

The present study aimed to study lipid-lowering effect of seven traditional Chinese medicine monomers in zebrafish system. Zebrafish were fed with high fat diet to establish a hyperlipemia model, then fasted and bathed with seven traditional Chinese medicine monomers stigmasterol, triacontanol, chrysophanol, vanillic acid, shikimic acid, polydatin and oleanolic acid respectively. The oil red O staining was used to detect the blood lipids of zebrafish. Serum total cholesterol and triglyceride levels were detected to validate the lipid-lowering effect. The result showed that a zebrafish model of hyperlipemia could be established by feeding larvae zebrafish with high fat diet. Among the seven traditional Chinese medicine monomers, chrysophanol had lipid-lowering effect. Chrysophanol significantly reduced serum total cholesterol and triglyceride levels in adult zebrafish fed with high fat diet. Chrysophanol accelerated peristalsis frequency of zebrafish intestine and the excretion of high fat food. It is concluded that chrysophanol has lipid- lowering effect in zebrafish, and the mechanism of the effect may be due to the roles of chrysophanol in reducing lipid absorption from gastrointestinal tract and accelerating the excretion of food.


Asunto(s)
Animales , Antraquinonas , Farmacología , Dieta Alta en Grasa , Alcoholes Grasos , Farmacología , Glucósidos , Farmacología , Hiperlipidemias , Quimioterapia , Hipolipemiantes , Farmacología , Larva , Lípidos , Sangre , Medicina Tradicional China , Ácido Oleanólico , Farmacología , Ácido Shikímico , Farmacología , Estigmasterol , Farmacología , Estilbenos , Farmacología , Ácido Vanílico , Farmacología , Pez Cebra
5.
Natural Product Sciences ; : 258-264, 2017.
Artículo en Inglés | WPRIM | ID: wpr-41801

RESUMEN

This study analyzed the seeds of Zizyphus jujuba var. inermis commonly used as a remedy in traditional Chinese medicine, in order to determine its various biologically active compounds. Through process 3-pentadecylcatechol, ρ-menth-8-ene, and γ-bisabolene were isolated and identified for the first time which are urushiol, monoterpenoidal, and sesquiterpenoidal compounds, respectively. Also, found were another sesquiterpenoidal compounds, vomifoliol, and four steroidal compounds, β-sitosterol, stigmasterol, stigmasta-5,23-dien-3β-ol, and stigmast-4-en-3-one. In addition, fourteen triterpenoidal compounds were isolated and identified. These were lupeol, betulinic acid, betulinaldehyde, alphitolic acid, 3-O-cis-ρ-coumaroyl-alphitolic acid, 3-O-trans-ρ-coumaroylalphitolic acid, 2-O-cis-ρ-coumaroyl-alphitolic acid, 2-O-trans-ρ-coumaroyl-alphitolic acid, zizyberanalic acid, ceanothic acid, oleanolic acid, maslinic acid, 3-O-cis-ρ-coumaroyl-maslinic acid, and 3-O-trans-ρ-coumaroylmaslinic acid. The structures were identified by comparing of the spectroscopic experiments, NMR and MS, and then compared that reported data, respectively. Three extracts of water, methanol, and chloroform from the seeds showed a weak anti-proliferative effect, anti-microbial activity, and anti-oxidant effect, respectively.


Asunto(s)
Antioxidantes , Cloroformo , Medicina Tradicional China , Metanol , Ácido Oleanólico , Estigmasterol , Agua , Ziziphus
6.
Natural Product Sciences ; : 154-161, 2016.
Artículo en Inglés | WPRIM | ID: wpr-49485

RESUMEN

Phytochemical investigation on the leaves of Pileostegia viburnoides Hook.f.et Thoms led to the isolation of twenty-five compounds, and their structures were identified as n-dotriacontane (1), taraxeryl acetate (2), friedelin (3), epifriedelinol (4), canophyllal (5), stigmast-4-en-3-one (6), stigmasterol (7), (24R)-5A-stigmastane-3,6-dione (8), ursolic acid (9), pomolic acid (10), umbelliferone (11), 4-epifriedelin (12), n-octatriacontanol (13), β-amyrin (14), α-amyrin (15), taraxerol (16), nonadecanol (17), friedelane (18), arachic acid (19), protocatechuic acid (20), n-pentatriacontanol (21), hexadecanoic acid (22), vincosamide (23), daucosterol (24), and skimming (25), respectively. To our best knowledge, compounds 1, 2, 12, 13, 17 - 19 and 21-23 were new within Saxifragaceae family. Compounds 15, 16, and 20 were produced from this genus for the first time. Compounds 4, 14 and 25 were first obtained from species P. viburnoides and compounds 3, 5 - 11, and 24 were achieved from the leaves of P. viburnoides for the first time. Furthermore, the anti-neuroinflammatory activity of these isolates was evaluated.


Asunto(s)
Humanos , Cumarinas , Ácido Palmítico , Saxifragaceae , Estigmasterol , Triterpenos
7.
Journal of Medicinal Plants. 2014; 13 (49): 15-21
en Inglés | IMEMR | ID: emr-141782

RESUMEN

Echinophora platyloba DC [Apiaceae] is one of the two endemic species of Echinophora genus in Iran. It has many folkloric uses and several biological activities but there is no information about its phytoconstituents. In this work some of the secondary metabolites were isolated, purified and identified from n-hexane, ethyl acetate and methanol extracts from the aerial parts and root of this plant for the first time. Resulting extracts were subjected to column chromatography using EtOAc/n-hexane as eluent. Further purifications were carried out using preparative TLC and recrystallization techniques. Characterization of compounds were established using spectroscopic data [[1]H-NMR, [13]C-NMR, MS and FT-IR], and by comparing with the literature. Stigmasterol, Sitosterol, Stigmasterol-beta-D-glycoside and Saccharose were purified from these extracts and their chemical structures were characterized. Several phytosterols were isolated from various extracts of aerial parts and great amount of saccharose was purified from the sweet root of the plant


Asunto(s)
Extractos Vegetales , Sacarosa , Estigmasterol , Sitoesteroles
8.
Chinese Journal of Natural Medicines (English Ed.) ; (6): 161-166, 2014.
Artículo en Inglés | WPRIM | ID: wpr-812292

RESUMEN

AIM@#To investigate the active chloroform fraction of the ethanol extract of Ipomoea carnea flowers on hematological changes in toluene diisocyanate-induced inflammation in Wistar rats.@*METHOD@#Except for the control group, all of the rats were sensitized with intranasal application of 5 μL of 10% toluene diisocyanate (TDI) for 7 days. One week after second sensitization, all of the rats were provoked with 5 μL of 5% TDI to induce airway hypersensitivity. After the last challenge, blood and bronchoalvelor lavage (BAL) fluid were collected and subjected to total and differential leucocytes count. Flash chromatography was performed on the most active chloroform fraction to isolate an individual component.@*RESULTS@#Treatment with the ethanolic extract and its chloroform fraction at an oral dose of 200 mg·kg⁻¹ showed a significant decrease in circulating neutrophil and eosinophil in blood and BAL as compared with standard dexamethasone (DEXA). The structure of the compound obtained from chloroform fraction of Ipomea carnea was elucidated as stigmast-5, 22-dien-3β-ol on the basis of spectral data analysis.@*CONCLUSION@#The chloroform fraction was found to be more effective to suppress airway hyper reactivity symptoms, and decreased count of both total and differential inflammatory cells.


Asunto(s)
Animales , Femenino , Masculino , Ratas , Asma , Sangre , Quimioterapia , Metabolismo , Líquido del Lavado Bronquioalveolar , Eosinófilos , Metabolismo , Flores , Química , Hematología , Inflamación , Sangre , Quimioterapia , Metabolismo , Ipomoea , Química , Recuento de Leucocitos , Estructura Molecular , Neutrófilos , Metabolismo , Fitoterapia , Extractos Vegetales , Química , Farmacología , Usos Terapéuticos , Ratas Wistar , Estigmasterol , Química , Farmacología , Usos Terapéuticos , 2,4-Diisocianato de Tolueno
9.
Bol. latinoam. Caribe plantas med. aromát ; 12(1): 15-17, ene. 2013. ilus
Artículo en Inglés | LILACS | ID: lil-722503

RESUMEN

alpha spinasterol was identified in stems of Amaranthus spinosus. The structure was obtained by spectroscopic methods and comparison with literature data.


alfa spinasterol fue identificado en ramas de Amaranthus spinosus. La estructura fue obtenida por metodos espectroscópicos y por comparación con datos de literature.


Asunto(s)
Amaranthus/química , Estigmasterol/aislamiento & purificación , Estigmasterol/análogos & derivados , Tallos de la Planta/química , Análisis Espectral
10.
Braz. j. pharm. sci ; 49(3): 537-547, July-Sept. 2013. ilus
Artículo en Inglés | LILACS | ID: lil-689907

RESUMEN

Stigmasterol - a plant sterol with several pharmacological activities - is susceptible to oxidation when exposed to air, a process enhanced by heat and humidity. In this context, microencapsulation is a way of preventing oxidation, allowing stigmasterol to be incorporated into various pharmaceutical forms while increasing its absorption. Microparticles were obtained using a blend of polymers of sodium alginate, starch and chitosan as the coating material through a one-stage process using the external gelation technique. Resultant microparticles were spherical, averaging 1.4 mm in size. Encapsulation efficiency was 90.42% and method yield 94.87%. The amount of stigmasterol in the oil recovered from microparticles was 9.97 mg/g. This technique proved feasible for the microencapsulation of stigmasterol.


O estigmasterol, um fitoesterol com diversas atividades farmacológicas, é suscetível à oxidação quando exposto ao ar, calor e umidade. Neste contexto, a microencapsulação é uma forma de proteção contra oxidação, permitindo a incorporação do estigmasterol em diversas formas farmacêuticas e aumentar sua absorção. As micropartículas foram obtidas por gelificação iônica externa, em uma etapa, utilizando como revestimento polímeros naturais de alginato de sódio, amido de milho e quitosana. As micropartículas apresentaram formato esférico com tamanho aproximado de 1,4 mm. O rendimento foi de 94,87% e a eficiência média de encapsulação de 90,42%. A quantidade de estigmasterol no óleo recuperado das micropartículas foi de 9,97 mg/g. O método mostrou-se viável para a microencapsulação do estigmasterol.


Asunto(s)
Estigmasterol/análisis , Alginatos/clasificación , Gelificantes , Almidón , Quitosano , Composición de Medicamentos/clasificación , /clasificación
11.
Journal of Medicinal Plants. 2013; 12 (48): 126-135
en Persa | IMEMR | ID: emr-148732

RESUMEN

Ferula is a genus of about 130 species of flowering plants in the family Umbelliferae, of which 30 species are found in Iran. Many species of this family possess medicinal qualities and have long been used in traditional medicine. This research aims to isolate, separate and determine the structure of the compounds found in the chloroform extract of the aerial parts of Ferula hirtella. We collect F. hirtella from the site of its natural habitat in Abade, Fars Province. The chloroform extract of the aerial parts is derived and then mixture separation using Column chromatography is performed. Using Column chromatography purification methods, we were able to separate, for the first time, two coumarins, Farneciferol C and Umbelliprenin, and a steroid compound, beta-stigmasterol from the chloroform extract of the F. hirtella which were identified using C NMR and H NMR spectral data. A majority of the compounds found in the chloroform extract of the aerial parts of F. hirtella are coumarins. Separation of beta-stigmasterol from the chloroform extract of this genus was achieved for the first time


Asunto(s)
Cloroformo , Extractos Vegetales , Componentes Aéreos de las Plantas , Cumarinas , Umbeliferonas , Estigmasterol/análogos & derivados
12.
Acta Pharmaceutica Sinica ; (12): 1179-1182, 2012.
Artículo en Chino | WPRIM | ID: wpr-274681

RESUMEN

To investigate the chemical constituents of Chamaecyparis obtusa var. breviramea f. crippsii, various column chromatography and spectroscopic methods were used for the isolation and elucidation of compounds. One new monoterpenoid glucoside, (4S)-4-isopropylcyclohex-l-enecarboxylic acid 4-O-beta-D-glucopyranoside (1), together with five known compounds, (4R)-p-menth-l-ene-7, 8-diol 7-O-beta-D-glucopyranoside (2), skimmin (3), 7-[[6-O-(6-deoxy-alpha-L-mannopyranosyl)-beta-D-glucopyranosyl]oxy]-2H-1-benzopyran-2-one (4), stigmast-4-en-3-one (5) and 1, 4-benzenedicarboxylic acid 1-butyl-4-(2-methylpropyl) ester (6) were isolated and identified from the twigs of this plant. All compounds were isolated from this plant for the first time. The methanol extract of this plant showed cytotoxicity on cancer cell lines A549, BGC-823, Du145 and MDA-MB-231 with IC50 values of 0.94, 1.07, 0.95 and 0.96 microg x mL(-1), respectively. Yet, compounds 1, 2 and 3 showed no cytotoxicity on cancer cell lines HeLa, BGC-823 and A549.


Asunto(s)
Humanos , Antineoplásicos Fitogénicos , Química , Farmacología , Línea Celular Tumoral , Chamaecyparis , Química , Cumarinas , Química , Farmacología , Glucósidos , Química , Farmacología , Estructura Molecular , Monoterpenos , Química , Farmacología , Hojas de la Planta , Química , Tallos de la Planta , Química , Plantas Medicinales , Química , Estigmasterol , Química , Farmacología
13.
Arab Journal of Pharmaceutical Sciences. 2011; 4 (6): 17-20
en Arabe | IMEMR | ID: emr-110395

RESUMEN

Sterols were identified in ten samples of Syrian virgin olive oil, which obtained from Olive Mill distributed to different places in Syria, using a gas chromatography according to the method adopted by the International Council of olive oil. The study concluded the development fingerprint for Syrian olive oil reflected by the following Parameters: delta 7- Stigmasterol /= 93%, Campesterol

Asunto(s)
Aceites de Plantas , Cromatografía de Gases , Sitoesteroles , Estigmasterol , Fitosteroles
14.
Journal of Medicinal Plants. 2011; 10 (37): 41-47
en Inglés | IMEMR | ID: emr-123920

RESUMEN

Salvia limbata is an aromatic herbaceous plant and grows widely in Iran Turkey and Afghanistan. In the previous study, six flavones together with rosmarinic acid were isolated from the ethyl acetate and methanol extracts of S. limbata. In this report, we focused on the isolation and identification of the glycosylated sterols and the main accumulated amino acid of the species S. limbata, which has not been previously reported. Aerial parts of the plant were dried, cut into small pieces and extracted with ethyl acetate and methanol by percolation at room temperature. The separation process was carried out using several chromatographic methods. Structural elucidation was based on NMR data, in comparison with those reported in the literature. The isolated compounds [Figure 1] from the ethyl acetate and MeOH extracts of S. limbata were identified as beta-sitosterol [1], stigmasterol [2], daucosterol [3], stigmasterol 3- O-glucoside [4] and tryptophan [5] by comparison of their NMR spectral data with those reported in the literature S. limbata can accumulate the tryptophan as a major free amino acid together with sterols and their glucosides. Therefore, consumption of S. limbata [as a herbal tea or other preparations], which contains the essential amino acid tryptophan, might be useful for dietary deficiency of tryptophan


Asunto(s)
Extractos Vegetales , Esteroles , Fitoterapia , Triptófano , Estigmasterol , Sitoesteroles
15.
Acta amaz ; 40(1): 207-212, mar. 2010. ilus, graf
Artículo en Portugués | LILACS, VETINDEX | ID: lil-546976

RESUMEN

A investigação fitoquímica das cascas do caule de Sterculia striata St. Hil. et Naudin, através de métodos cromatográficos, conduziu ao isolamento dos esteróides sitosterol, estigmasterol e sitosterol-3-O-ß-D-glicopiranosídeo, além de quatro triterpenóides pentacíclicos, o lupeol, 3-ß-O-acil lupeol, lupenona e ácido betulínico. As estruturas desses compostos foram identificadas por análise dos espectros de RMN ¹H e 13C e comparações com dados da literatura. Para determinação do teor de fenóis totais do extrato etanólico de S. striata utilizou-se o reativo Folin Ciocalteu, enquanto na avaliação da atividade antioxidante empregou-se o radical livre DPPH. Este é o primeiro trabalho descrevendo o estudo químico com as cascas do caule desta espécie.


The phytochemical investigation of the stem bark of Sterculia striata St. Hil. et Naudin by chromatographic methods led to the isolation of sitosterol, stigmasterol and sitosterol-3-O-ß-D-glucopyranoside, besides pentacyclic triterpenoids, lupeol, 3-ß-O-acyl-lupeol, lupenone and betulinic acid. The structures of these compounds were identified by ¹H and 13C NMR spectral data analysis and comparison with literature data. For determining of the phenolic content of the etanolic extract of Sterculia striata we used the Folin Ciocalteu reagent, and for the evaluation of antioxidant activity, we utilized the DPPH free radical. This is the first work reporting the chemical study with the stem bark of this species.


Asunto(s)
Sitoesteroles/química , Estigmasterol/química , Triterpenos , Sterculia/química , Antioxidantes/análisis
16.
Journal of Medicinal Plants. 2010; 9 (34): 67-73
en Inglés | IMEMR | ID: emr-117704

RESUMEN

The genus Teucrium [Lamiaceae] is comprised 340 species in widespread over the world. Remarkably, In the Flora Iranica this genus is represented by twelve species, three of which are endemic. The genus Teucrium are known for medicinal value, antibacterial, antioxidant, anti-inflamatory, antiseptic and antipyretic properties. Isolation of beta-Stigmasterol from Teucrium hyrcanicum L. The aerial parts of Teucrium hyrcanicum were collected during the flowering stage from Rostamabad, Gilan Province, in July 2006 and then were extracted by chloroform and acetone [2:1] for 36 h. Crude extract was separated by adsorption chromatography over silica gel with elution by petroleum and ethylacetate. Final purification was performed by smaller chromatography. A steroid named beta - Stigmasterol were isolated and the structur of them were proved using spectral data consist of FTIR, UV, HRMS, also 1-DNMR, HNMR, [13]CNMR], 2-DNMR [HMQC, HMBC] and DEPT [90[degree symbol],135[degree symbol]. beta-Stigmasterol was characterized for the first time in Teucrium hyrcanicum


Asunto(s)
Estigmasterol/síntesis química , Extractos Vegetales
17.
Electron. j. biotechnol ; 12(2): 1-2, Apr. 2009. ilus, tab
Artículo en Inglés | LILACS | ID: lil-551362

RESUMEN

Kraft mill effluent, due to its organic matter content and acute toxicity, must be treated. A primary treatment followed by a secondary treatment is the most common system. Aerated lagoon is also considered an effective biological treatment, although this technology has some drawbacks related with operation parameters and land extension space. Moreover, the recovery efficiency for micropollutants contained in kraft mill effluent is questioned due to the anoxic zone in the system. The goal of this work is to evaluate the performance of the aerated lagoon to remove stigmasterol contained in kraft mill effluents. Kraft mill effluent was treated by an aerated lagoon (AL), which was operated with three different stigmasterol load rates (SLR = 0.2, 0.6 and 1.1 mg/L x d) and a hydraulic retention time of 1 day. The AL’s maximum Chemical Oxygen Demand (COD) removal was 65 percent, whereas the Biological Oxygen Demand (BOD5) was around 95 percent. The removal efficiency of stigmasterol removal was 96 percent when SLR 1.1 mg/L x d, although an accumulation of stigmasterol was detected for lower SLR.


Asunto(s)
Contaminación de Lagos y Embalses/análisis , Estigmasterol , Eliminación de Efluentes Industriales/análisis , Eliminación de Efluentes Industriales/métodos , Residuos de Alimentos
18.
China Journal of Chinese Materia Medica ; (24): 1007-1008, 2009.
Artículo en Chino | WPRIM | ID: wpr-263080

RESUMEN

<p><b>OBJECTIVE</b>To study the chemical constituents of Oxytropis microphylla.</p><p><b>METHOD</b>The compounds were isolated and purified by various column chromatographic techniques and their structures were elucidated on the basis of spectral analysis (EI-MS, 1H-NMR, 13C-NMR).</p><p><b>RESULT</b>Eight compounds were isolated and identified as kaempferol (1), baicalein (2), 5-hydroxy-7, 8, 4'-trimethoxyflavone (3), stigmasterol (4), stigmast-4-en-3beta-ol (5), beta-sitosterol (6), lupenol (7), dehydrocostus lactone (8).</p><p><b>CONCLUSION</b>All compounds were isolated for the first time from this plant, compounds 2, 3, 5, and 8 were isolated for the first time from this genus.</p>


Asunto(s)
Cromatografía Líquida de Alta Presión , Flavanonas , Química , Flavonoides , Química , Quempferoles , Química , Lactonas , Química , Oxytropis , Química , Sesquiterpenos , Química , Sitoesteroles , Química , Espectrometría de Masa por Ionización de Electrospray , Estigmasterol , Química , Triterpenos , Química
19.
Rev. bras. farmacogn ; 18(1): 47-52, jan.-mar. 2008. ilus, tab
Artículo en Inglés | LILACS | ID: lil-480837

RESUMEN

Amongst the different forms of therapy to prevent and cure illnesses, plants have been, undoubtedly, the most utilized ones since the beginning of mankind. Brazil has a great diversity on plants that possess non-researched medicinal potential and are promising sources of therapeutic and pharmacological innovations. The Rubiaceae family is considered the biggest one of the order Gentianales, presenting around 637 genera and 10,700 species. Richardia grandiflora (Cham. & Schltdl.) Steud., known popularly as "ervanço", "poaia" or "ipeca-mirim", has ethnopharmacological indications to use as decoction against hemorrhoids and as vermifuge. Aiming at contributing to the chemotaxonomic study of the family Rubiaceae and considering the absence of data in literature about the chemical constitution of the species Richardia grandiflora, the latter was submitted to a phytochemical study to isolate its chemical constituents, through usual chromatographic methods, and after identifying them by means of spectroscopic methods such as ÕH and 13C NMR, with the add of two-dimensional techniques, besides comparison with literature data. Five constituents were isolated through this first phytochemical study with R. grandiflora: a mixture of the steroids beta-sitosterol and stigmasterol, o-hydroxy-benzoic acid, m-methoxy-p-hydroxy-benzoic acid and phaeophitin A, all of them isolated for the first time from the genus Richardia.


Dentre as diversas formas de terapia para a prevenção e cura de doenças, as plantas foram, indubitavelmente, as mais amplamente utilizadas desde o início da humanidade. O Brasil tem grande diversidade de plantas com potenciais medicinais, ainda não pesquisados, e que são promissoras fontes de inovações terapêuticas e farmacológicas. A família Rubiaceae, considerada a maior da ordem Gentianales, possui cerca de 637 gêneros e 10.700 espécies. Richardia grandiflora (Cham. & Schltdl.) Steud., conhecida popularmente como ervanço, poaia ou ipeca-mirim, tem indicações etnofarmacológicas para uso contra hemorróidas e como vermífugo na forma de decocto. Visando a contribuir com o estudo quimiotaxonômico da família Rubiaceae e tendo em vista a ausência de dados na literatura acerca da constituição química de Richardia grandiflora, esta foi submetida a um estudo fitoquímico para o isolamento de seus constituintes químicos, através dos métodos cromatográficos usuais, e posterior identificação estrutural dos mesmos, utilizando-se os métodos espectroscópicos de RMN ÕH e 13C uni e bidimensionais, além de comparações com modelos da literatura. Deste estudo pioneiro com R. grandiflora foram isolados e identificados cinco constituintes: uma mistura dos esteróides beta-sitosterol e estigmasterol, o ácido o-hidroxibenzóico, o ácido m-metoxi-p-hidroxi-benzóico e a feofitina A, todos inéditos no gênero Richardia.


Asunto(s)
Estigmasterol/aislamiento & purificación , Estigmasterol/química , Feofitinas/aislamiento & purificación , Feofitinas/química , Hidroxibenzoatos , Rubiaceae/química
20.
Egyptian Pharmaceutical Journal [National Research Center]. 2008; 7 (1): 51-68
en Inglés | IMEMR | ID: emr-99684

RESUMEN

The aerial parts of three plants belonging to Family Asteraceae: Inula crithmoides, Iphiona scarab and Jasonia montana were investigated. Phytochemicals isolated from Inula crithmoides were identified as: isopimpinellin [I], scoparone [II], psoralene [III], kaempferol-3-O-alpha-L-rhamnopyranoside [IV], kaempferol -3, 7- di-O-alpha-L-rhamnopyranoside [V], kaempferol-3-O-beta- D-glucopyranoside-7-O-alpha-L-rhamnopyranoside [VI] and isorhamnetin-3-O-beta-D-glucopyranoside-7-O-alpha-L-rhamnopyranoside [VII]. From Iphiona scarba umbelliferone [VIII], xanthotoxol [IX], marmesin [X], alpha-amyrin [XI], stigmasterol [XII] and beta-sitosterol [XIII] were isolated. Moreover, Jasonia montana was found to contain 7-hydroxy-3, 5, 6, 3',. 4'-pentamethoxy flavone [XIV], 5, 7-dihydroxy- 3, 6, 3', 4' -tetramethoxy flavone [XV] and 5, 7-dihydroxy-3, 3', 4' -trimethoxy flavone [XVI], in addition to ferulic acid, caffeic acid, chrorogenic acid, alpha-amyrin, stigmasterol and beta-sitosterol. Inula crithmoides aqueous methanolic extract showed significant inhibitory effect on mouse lymphoma [Cell line L1210] in vitro study in concentration dependant manner starting from 12.5 up to 250 microg/ml [20 - 100% inhibition], respectively. In vivo study, the results indicated that Inula crithmoides methanolic extract had significant antioxidant effect against mycotoxin [Ochratoxin A]-induced oxidative stress in rat. Iphiona scabra and Jasonia montana ethanolic extracts showed potent acute anti-inflammatory, anticoagulant and hypotenssive activities comparing to the standard drugs [indomethacine]


Asunto(s)
Inula , Ficusina/aislamiento & purificación , Cumarinas/aislamiento & purificación , Quempferoles/aislamiento & purificación , Flavonoles/aislamiento & purificación , Estigmasterol/aislamiento & purificación , /aislamiento & purificación , Estrés Oxidativo , Antioxidantes
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