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      Isoflavonoids from the rhizomes of Iris hungarica and antibacterial activity of the dry rhizomes extract Translated title: Isoflavonoides de los rizomas de Iris hungarica y actividad antibacteriana del extracto de rizomas seco

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          Abstract

          Abstract Aim: The aim of the work was isolation and identification of the phenolic compounds from the rhizomes of Iris hungarica. Materials and methods: To establish by chemical and spectral methods for the structures of phenolic compounds, which were isolated from the rhizomes of Iris hungarica Waldst. et Kit. (Iridaceae family). Compounds were obtained by column chromatography on silica gel and their structures were determined by UV, IR, MS, 1H-NMR spectra methods. Preliminary screening of antibacterial activity was determined. Results: From the ethanolic extract of the rhizomes of I. hungarica, which is widespread in Ukraine, for the first time two new for this species isoflavones, tectorigenin and tectoridin and xanthone mangiferin, together with known isoflavonoids daidzein, genistein, formononetin were isolated. The dry extract of the rhizomes of I. hungarica at a concentration of 1% has shown the highest inhibitory activity for Gram-positive bacteria and fungi.

          Translated abstract

          Resumen Objetivo: El objetivo del trabajo es el aislamiento y la identificación de los compuestos fenólicos de los rizomas de Iris hungarica. Materiales y métodos: Se utilizaron métodos químicos y espectrales para conocer las estructuras de compuestos fenólicos que se aislaron de los rizomas de Iris hungarica Waldst. et Kit. (Familia de Iridaceae). Los compuestos se obtuvieron mediante cromatografia en columna sobre gel de sílice y se determinaron sus estructuras mediante análisis de sus espectros por UV, IR, MS, 1H-RMN. Se determinó el cribado preliminar de la actividad antibacteriana. Resultados: Se aislaron por primera vez de los rizomas de Iris hungarica (común en Ucra-nia) dos isoflavonas, tectorigenina y tectoridina (nuevas para esta especie), el xan-tonoide mangiferina y los isoflavonoides daidzeina, genisteina y formononetina. El extracto seco de los rizomas de I. hungarica a una concentración de 1% ha mostrado la actividad inhibitoria más alta para bacterias y hongos Gram-positivos.

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          THE NEPHELOMETER:AN INSTRUMENT FOR ESTIMATING THE NUMBER OF BACTERIA IN SUSPENSIONS USED FOR CALCULATING THE OPSONIC INDEX AND FOR VACCINES.

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            Evaluation of quadrupole time-of-flight tandem mass spectrometry and ion-trap multiple-stage mass spectrometry for the differentiation of C-glycosidic flavonoid isomers.

            LC-MS-MS is becoming a very important tool for the on-line identification of natural products in crude plant extracts. For an efficient use of this technique in the dereplication of natural products, a careful study of the parameters used to generate informative MS-MS spectra is needed. In this paper, the collision-induced dissociation (CID) MS-MS spectra of ubiquitous C-glycosidic flavonoids have been systematically studied using hybrid quadrupole time-of-flight and ion-trap (IT) mass analysers under various CID energy conditions. Efficient differentiation of flavonoid C-glycoside isomers was possible, based on the comparison of CID-MS-MS spectra of particular C-glycoside unit fragments. Striking differences between 6-C and 8-C flavonoid glycosides were especially observed in the product ion spectra of their 0.2X+ fragments ([M+H-120]+). Some guidelines for the on-line characterisation of C-glycosidic flavonoids by LC-MS-MS or LC-multiple-stage MS are given.
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              Mangiferin: A xanthonoid with multipotent anti-inflammatory potential.

              Over the last era, small molecules sourced from different plants have gained attention for their varied and long-term medicinal benefits. Their advantageous therapeutic effects in diverse pathological complications lead researchers to give an ever-increasing emphasis on them and discover their novel therapeutic potentials. Among these, the heat stable, xanthonoid group of organic molecules has gained special importance with distinctive regards to the bioactive molecule mangiferin due to its solubility in water. Mangiferin, a yellow polyphenol having C-glycosyl xanthone structure, is widely present in different edible sources like mango, and possesses numerous biological activities. Extensive research with this molecule shows its antioxidant, anti-inflammatory, antidiabetic, anticancer, antimicrobial, analgesic, and immunomodulatory properties. Thus, it provides protection against a wide range of physiological disorders. The C-glucosyl linkage and polyhydroxy groups in mangiferin's structure contribute essentially to its free radical-scavenging activity. Moreover, its ability in regulating various transcription factors like NF-κB, Nrf-2, etc. and modulating the expression of different proinflammatory signaling intermediates like tumor necrosis factor-α, COX-2, etc. contribute to its anti-inflammatory, anticancer, and antidiabetic potentials. In this comprehensive article, information has been provided about the sources, chemical structure, metabolism, and different biological activities of mangiferin with special emphasis on the underlying cellular signal transduction pathways. Insights into an in-depth assessment of mangiferin's anti-inflammatory therapeutic potential have also been discussed in detail. On an overall perspective, this review aims to stage mangiferin's diversified therapeutic applications and its emerging possibility as a promising drug in future based on its anti-inflammatory property. © 2016 BioFactors, 42(5):459-474, 2016.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                ars
                Ars Pharmaceutica (Internet)
                Ars Pharm
                Universidad de Granada (Granada, Granada, Spain )
                2340-9894
                March 2017
                : 58
                : 1
                : 39-45
                Affiliations
                [3] Kharkiv orgnameNational University of Pharmacy orgdiv1Department of nutritiology and pharmaceutical bromatology Ukraine
                [2] Kharkiv orgnameNational University of Pharmacy orgdiv1Department of Pharmacognosy Ukraine
                [1] Kharkiv orgnameNational University of Pharmacy orgdiv1Department of Botany Ukraine
                Article
                S2340-98942017000100039
                10.4321/s2340-98942017000100005
                3989f351-4a2a-4b10-a927-a8e672a6b574

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 International License.

                History
                : 06 March 2017
                : 17 March 2017
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 31, Pages: 7
                Product

                SciELO Spain


                isoflavonoides,antibacterial activity,Iris hungarica,mangiferin,tectoridin,tectorigenin,isoflavonoids,actividad antibacteriana,mangiferina,tectoridina,tectorigenina

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