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      DETERMINACIÓN DE UN PRINCIPIO ACTIVO DE POLYGONUM PUNCTATUM ELLIOT; ESPECTROS COMPLETOS DE RMN DE STIGMAST-5-EN-3P-OL (500/125 MHZ) Translated title: DETERMINATION OF AN ACTIVE PRINCIPLE OF POLYGONUM PUNCTATUM ELUOT; FULL NMR SPECTRA OF STIGMAST-5-EN-3P-OL (500/125 MHz)

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          Abstract

          RESUMEN Spanish title: Determinación de un principio activo de Polygonum punctatum; espectros completos de RMN de stigmast-5-en-3¡5-ol (500/125 MHz). El objetivo de este artículo es proveer de información espectral completa de stigmast-5-en-3y3 -ol (1), cuyos otros nombres comunes son: /f-sitosterol, /f-sitosterin, 22,23 -dihydrostigmasterol, and IUPAC ñame: 17-(5-ethyl-6-methylheptan-2-yl)-10,13-dimethyl-2,3,4,7,8,9,ll,12,14,15,16,17-dodecahydro-l-cyclopenta[a]phenanthren-3-ol., and IUPAC ñame: La colección de espectros incluye los estudios HMBC, HSQC and COSY. Los estudios ROESY o NOESY no están contemplados. El compuesto 1 resultó ser el componente mayoritario del extracto alcohólico de Polygonum punctatum (Polygonaceae), especie macrófita nativa de Paraguay con aplicaciones terapéuticas como: hemorroides, abortos y otras. El compuesto 1 fue extraído por maceración en etanol 96° y aislado mediante la aplicación de técnicas cromatográficas. Una investigación bibliográfica permitió establecer una correlación entre la información de la medicina tradicional de la propiedad antiinflamatoria de P. punctatum y el compuesto aislado 1 para el cual una serie de informes sobre sus propiedades farmacológicas permitió afirmar que 1, siendo el componente mayoritario del extracto alcohólico de las raices, es uno de los principios activos de la planta, es decir, el principio anti-inflamatorio. El trabajo espectroscópico y la elucidación estructural condujeron a la identificación del compuesto 1 como /f-sitosterol. La investigación bibliográfica permitió añadir p-sitosterol (1) como un nuevo compuesto en la especie Polygonum punctatum para la cual solo se describió previamente un sesquiterpeno antifúngico potente, polygodial. Con la presente descripción del compuesto 1 en P. punctatum, el número total de metabolitos secundarios y principios activos hasta ahora descritos en la especie alcanza la cifra de dos (según la última revisión bibliográfica sobre el contenido químico del género Polygonum, 2014).

          Translated abstract

          ABSTRACT The aim of this report is to provide full NMR spectra (:H 500 MHz, 13C 125.8 MHz) of stigmast-5-en-3/?-ol (1), whose other common ñames are: /f-sitosterol, /f-sitosterin, 22,23-dihydrostigmasterol, and IUPAC ñame: 17-(5-ethyl-6-methylheptan-2-yl)-10,13-dimethyl-2,3,4,7,8,9,ll,12,14,15,16,17-dodecahydro-l-cyclopenta[a]phenanthren-3-ol., and IUPAC ñame: The spectra set includes HMBC, HSQC and COSY studies. ROESY or NOESY studies were excluded. Compound 1 is found to be the major component of the alcoholic extract of roots of Polygonum punctatum (Polygonaceae), a macrophyte native species of Paraguay with varied therapeutic applications like anti-inflammatory among others. Compound 1 was extracted by maceration in EtOH 96° and it was isolated by using chromatographic techniques. A bibliographic research allowed to establish a correlation between traditional medicine information of anti-inflammatory property of P. punctatum and the isolated compound 1 for which a series of reports about its pharmacological properties permitted to affirm that 1, being the major secondary metabolite in the alcoholic extract of roots, is one of the active principies of the plant, namely the anti-inflammatory principie. The spectroscopic work and the structural elucidation permitted the identification of compound 1 as /f-sitosterol. The bibliographic research allowed to label /f-sitosterol (1) as a new compound in the species P. punctatum for which only polygodial, a potent antifungal sesquiterpene, was previously described. With the present reporting of compound 1 in P. punctatum, the total number of secondary metabolites and active principies thus far described in the species reaches the cipher of two (according to the newest bibliographic review on the chemical content of the Polygonum genus, 2014).

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          Emodin (3-methyl-1,6,8-trihydroxyanthraquinone) inhibits TNF-induced NF-kappaB activation, IkappaB degradation, and expression of cell surface adhesion proteins in human vascular endothelial cells.

          Most inflammatory agents activate nuclear transcription factor-kappaB (NF-kappaB) which results in expression of genes for cytokines, adhesion molecules, and enzymes involved in amplification and perpetuation of inflammation. Emodin (3-methyl-1,6,8-trihydroxyanthraquinone) is an active component from the roots of Polygonum cuspidatum that has been reported to exhibit antiinflammatory properties but the mechanism is not known. In the present study we investigated the effects of emodin on the activation of NF-kappaB in human umbelical vein endothelial cells (EC). Treatment of EC with TNF activated NF-kappaB; preincubation with emodin inhibited this activation in a dose- and time-dependent manner. Emodin did not chemically modify NF-kappaB subunits but rather inhibited degradation of IkappaB, an inhibitory subunit of NF-kappaB. Since the promoter regions of ICAM-1, VCAM-1, and ELAM-1 contain NF-kappaB binding sites and these adhesion molecules are involved in the attachment of leukocytes to EC, the effect of emodin on the adhesion of monocytes to EC and the expression of these adhesion molecules was also studied. Treatment of EC with TNF for 6 h increased the adhesion of monocytes to EC, which correlated with increases in cell surface expression of ICAM-1, VCAM-1 and ELAM-1. Pretreatment of EC for 1 h with emodin inhibited both monocyte-EC attachment and expression of ICAM-1, ELAM-1 and VCAM-1. These results indicate that emodin is a potent inhibitor of NF-kappaB activation and expression of adhesion molecules and thus could be useful in treating various inflammatory diseases.
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            An anti-inflammatory principle from cactus.

            In previous studies, the ethanol extract of cactus (Opuntia ficus-indica) showed potent anti-inflammatory action. In the present study, following fractionation of the methanol extract of cactus stems guided by adjuvant-induced chronic inflammation model in mice, an active anti-inflammatory principle has been isolated and identified as beta-sitosterol.
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              Medicinal and Poisonous Plants of Pakistan

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                Author and article information

                Journal
                rbq
                Revista Boliviana de Química
                Rev. Bol. Quim
                Universidad Mayor de San Andrés (La Paz, La Paz, Bolivia )
                0250-5460
                April 2017
                : 34
                : 1
                : 14-27
                Article
                S0250-54602017000100003 S0250-5460(17)03400100003
                b87b8cd9-0e86-4ef3-b338-8166c0612a7f

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 31 May 2017
                : 23 May 2017
                : 22 May 2017
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 44, Pages: 14
                Product

                SciELO Bolivia

                Self URI: Texto completo solamente en formato PDF (ES)
                Categories
                Artículos Originales

                NMR spectra,500 MHz,Stigmast-5-en-3-ol,Sitosterol,Polygonum punctatum Elliott,Polygonaceae,Roots,Anti-inflammatory

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