5 research outputs found
Simultaneous Determination of Various Isothiocyanates by RP-LC Following Precolumn Derivatization with Mercaptoethanol
Numerous isothiocyanates (ITCs) are poorly soluble in water which causes their precipitation in aqueous mobile phases used in reversed phase liquid chromatography (RP-LC), thus impacting the accuracy of the quantification. By comparing the amounts of ITCs injected and released from the column, losses could be estimated at 5â32% depending on polarities and concentrations. Results could be dramatically improved in terms of separation and quantification using RP-LC with a mercaptoethanol precolumn derivatization aimed at avoiding ITCs precipitation. The cancer chemoprotective allyl-ITC and sulforaphane were found in cabbage extracts at 1.2 and 2.7 Όg gâ1 fresh weight, respectively
Research of functional and technological interest isothiocyanates in Brassicaceae
Les isothiocyanates (ITCs), produits de dĂ©gradation des glucosinolates, sont des molĂ©cules prĂ©sentes dans diverses familles vĂ©gĂ©tales dont les BrassicacĂ©es. Des travaux de recherche ont suggĂ©rĂ© que les ITCs ont des effets bĂ©nĂ©fiques sur la santĂ©, notamment en empĂȘchant la prolifĂ©ration des cellules cancĂ©reuses et qu ils possĂšdent des propriĂ©tĂ©s antimicrobiennes pouvant ĂȘtre exploitĂ©es dans les procĂ©dĂ©s industriels. Cependant, les donnĂ©es concernant les propriĂ©tĂ©s biologiques des ITCs, ainsi que les mĂ©canismes molĂ©culaires auxquels ils participent restent encore souvent inexpliquĂ©s. L'objectif de ce travail a Ă©tĂ© de mettre au point des mĂ©thodes permettant une analyse qualitative et quantitative d'ITCs ayant des structures physico-chimiques diffĂ©rentes. Les mĂ©thodes ont ensuite Ă©tĂ© appliquĂ©es Ă l'analyse du contenu en ITC de vĂ©gĂ©taux produits en Alsace. Les rĂ©sultats obtenus ont permis de mettre en Ă©vidence une diversitĂ© qualitative et quantitative du contenu en ITC en fonction de l'espĂšce et de la variĂ©tĂ© de BrassicacĂ©es. En parallĂšle, des tests d'activitĂ© antibactĂ©rienne et anticancĂ©reuse ont Ă©tĂ© rĂ©alisĂ©s afin de sĂ©lectionner les espĂšces molĂ©culaires les plus efficaces. Pour l'activitĂ© antibactĂ©rienne, il s'est avĂ©rĂ© que l'efficacitĂ© d'inhibition des cellules bactĂ©riennes dĂ©pendait ĂĄ la fois de l'espĂšce bactĂ©rienne, de la structure chimique de la chaine latĂ©rale des ITCs et de leur concentration. Quant Ă l'Ă©tude de l'activitĂ© anticancĂ©reuse, les rĂ©sultats ont montrĂ© que les ITCs sont capable d'inhiber des cellules cancĂ©reuses coliques.The isothiocyanates (ITCs), breakdown products of the glucosinolates, are molecules present in various vegetable families such as Brassicaceae. Research suggested that ITCs have beneficial effects on health; particularly by preventing the proliferation of cancer cells and that they have antibacterial properties being able to be exploited in industrial processes. However, data concerning the biological properties of ITCs, as well as the molecular mechanisms in which they take part remain still often unexplained. The objective of this work was to develop methods allowing a qualitative and quantitative analysis of ITCs with various physicochemical properties. These methods were then applied to analyze the ITC contents in plants produced in Alsace. Our results highlighted a qualitative and quantitative diversity of the ITC contents, depending on the species and on the variety of Brassicaceae. Indeed; antibacterial and anticancer activity tests were carried out in order to select the most effective molecular species. Antibacterial activity test showed that the effectiveness of ITCs on bacterial cells inhibition was related to bacterial species itself and the chemical structure of the side chain of ITCs as well as their concentration. Anti-cancer activity tests showed that ITCs are able to inhibit colon cancer cells
Research of functional and technological interest isothiocyanates in Brassicaceae
Les isothiocyanates (ITCs), produits de dégradation des glucosinolates, sont des molécules présentes dans diverses familles végétales dont les Brassicacées. Des travaux de recherche ont suggéré que les ITCs ont des effets bénéfiques sur la santé, notammenThe isothiocyanates (ITCs), breakdown products of the glucosinolates, are molecules present in various vegetable families such as Brassicaceae. Research suggested that ITCs have beneficial effects on health; particularly by preventing the proliferation o
Recherche d'isothiocyanates Ă intĂ©rĂȘts fonctionnel et technologique chez les BrassicacĂ©es
Les isothiocyanates (ITCs), produits de dĂ©gradation des glucosinolates, sont des molĂ©cules prĂ©sentes dans diverses familles vĂ©gĂ©tales dont les BrassicacĂ©es. Des travaux de recherche ont suggĂ©rĂ© que les ITCs ont des effets bĂ©nĂ©fiques sur la santĂ©, notamment en empĂȘchant la prolifĂ©ration des cellules cancĂ©reuses et qu ils possĂšdent des propriĂ©tĂ©s antimicrobiennes pouvant ĂȘtre exploitĂ©es dans les procĂ©dĂ©s industriels. Cependant, les donnĂ©es concernant les propriĂ©tĂ©s biologiques des ITCs, ainsi que les mĂ©canismes molĂ©culaires auxquels ils participent restent encore souvent inexpliquĂ©s. L objectif de ce travail a Ă©tĂ© de mettre au point des mĂ©thodes permettant une analyse qualitative et quantitative d ITCs ayant des structures physico-chimiques diffĂ©rentes. Les mĂ©thodes ont ensuite Ă©tĂ© appliquĂ©es Ă l analyse du contenu en ITC de vĂ©gĂ©taux produits en Alsace. Les rĂ©sultats obtenus ont permis de mettre en Ă©vidence une diversitĂ© qualitative et quantitative du contenu en ITC en fonction de l espĂšce et de la variĂ©tĂ© de BrassicacĂ©es. En parallĂšle, des tests d activitĂ© antibactĂ©rienne et anticancĂ©reuse ont Ă©tĂ© rĂ©alisĂ©s afin de sĂ©lectionner les espĂšces molĂ©culaires les plus efficaces. Pour l activitĂ© antibactĂ©rienne, il s est avĂ©rĂ© que l efficacitĂ© d inhibition des cellules bactĂ©riennes dĂ©pendait ĂĄ la fois de l espĂšce bactĂ©rienne, de la structure chimique de la chaine latĂ©rale des ITCs et de leur concentration. Quant Ă l Ă©tude de l activitĂ© anticancĂ©reuse, les rĂ©sultats ont montrĂ© que les ITCs sont capable d inhiber des cellules cancĂ©reuses coliques.The isothiocyanates (ITCs), breakdown products of the glucosinolates, are molecules present in various vegetable families such as Brassicaceae. Research suggested that ITCs have beneficial effects on health; particularly by preventing the proliferation of cancer cells and that they have antibacterial properties being able to be exploited in industrial processes. However, data concerning the biological properties of ITCs, as well as the molecular mechanisms in which they take part remain still often unexplained. The objective of this work was to develop methods allowing a qualitative and quantitative analysis of ITCs with various physicochemical properties. These methods were then applied to analyze the ITC contents in plants produced in Alsace. Our results highlighted a qualitative and quantitative diversity of the ITC contents, depending on the species and on the variety of Brassicaceae. Indeed; antibacterial and anticancer activity tests were carried out in order to select the most effective molecular species. Antibacterial activity test showed that the effectiveness of ITCs on bacterial cells inhibition was related to bacterial species itself and the chemical structure of the side chain of ITCs as well as their concentration. Anti-cancer activity tests showed that ITCs are able to inhibit colon cancer cells.STRASBOURG-Sc. et Techniques (674822102) / SudocSudocFranceF