A new ellagitannin, named bractin （1）, had been isolated from the dried aerial part of Cleidion bracteosum. Its structure was determined based on various of spectral analysis.
Objective:To study antifungal activity of a new ellagitannin isolated from the plant residues of Euphorbia antisyphilitica(E.antisyphilitica)Zucc in the wax extraction process.Methods:An extract was prepared from dehy...Objective:To study antifungal activity of a new ellagitannin isolated from the plant residues of Euphorbia antisyphilitica(E.antisyphilitica)Zucc in the wax extraction process.Methods:An extract was prepared from dehydrated and pulverized residues and fractionated by liquid chromatography on Amberilte XAD-16,until obtained an ellagitannin-rich ethanolic fraction which was treated by rotaevaporation to recover the ellagitannin as fine powder.An aqueous solution was prepared and treated through ionic exchange liquid chromatography(Q XL)and gel permeation chromatography(G 25).The ellagitannin-rich fraction was thermogravimetrically evaluated(TGA and DTA)to test the thermo-stability of ellagic acid(monomeric unit).Then ellagitannin powder was analyzed by infrared spectrospcopy to determinate the functional groups and.also mass spectroscopy was used to determine the molecular ion.Results:The principal functional groups of ellagitannin were determined,the molecular weight was 860.7 g/mol;and an effective antifungal activity against phytopathogenic fungi was demonstrated.Conclusions:It can be concluded that the new ellagitannin(860.7 g/mol)isolated from E.antisyphilitica Zucc is an effective antifungal agent against Alternaria alternata,Fusarium oxyzporum,Colletotrichum gloeosporoides and Rhizoctnia solani.展开更多
Urolithin A(UA)is a metabolic compound generated during the biotransformation of ellagitannins by the intestinal bacteria.The physiologically relevant micromolar concentrations of UA,achieved in the plasma and gastroi...Urolithin A(UA)is a metabolic compound generated during the biotransformation of ellagitannins by the intestinal bacteria.The physiologically relevant micromolar concentrations of UA,achieved in the plasma and gastrointestinal tract(GI)after consumption of its dietary precursors,have been revealed to offer GI protection.The health benefit has been demonstrated to be principally related to anticancer and anti-inflammatory effects.UA has been shown to possess the capability to regulate multiple tumor and inflammatory signaling pathways and to modulate enzyme activity,including those involved in carcinogen biotransformation and antioxidant defense.The purpose of this review is to gather evidence from both in vitro and in vivo studies showing the potential of UA in GI protection alongside suggested mechanisms by which UA can protect against cancer and inflammatory diseases of the digestive tract.The data presented herein,covering both studies on the pure compound and in vivo generated UA form its natural precursor,support the potential of this metabolite in treatment interventions against GI ailments.展开更多
Objective: To determinate the recovery of total polyphenolic compounds content,in vitro antioxidant activity and HPLC/ESI/MS characterization of extract from Nephelium lappaceum L.(Mexican rambutan).Methods: The rambu...Objective: To determinate the recovery of total polyphenolic compounds content,in vitro antioxidant activity and HPLC/ESI/MS characterization of extract from Nephelium lappaceum L.(Mexican rambutan).Methods: The rambutan husk extract was obtained by aqueous extraction and a polyphenolic fraction was recovered using Amberlite XAD-16. The total polyphenolic compounds content was determined by the Folin Ciocalteu and butanol-HCI methods.In vitro antioxidant activity was performed using ABTS and ferric reducing antioxidant power methods.Results: Mexican rambutan husk showed a total polyphenolic content of 582 mg/g and an evident antioxidant activity by ABTS and ferric reducing antioxidant power analysis.The HPLC/ESI/MS assay allowed the identification of 13 compounds, most of which belong to ellagitannins. Geraniin, corilagin and ellagic acid were present in the sample;the mineral composition was also evaluated.Conclusions: Rambutan husk cultivated in Mexico is a promising source for the recovery of added value bioactive compounds with antioxidant activity, which have potential applications as bioactive antioxidant agents for the treatment of diseases.展开更多
文摘A new ellagitannin, named bractin （1）, had been isolated from the dried aerial part of Cleidion bracteosum. Its structure was determined based on various of spectral analysis.
基金Supported by CONACYT's program of Food Science and Technology(Grant No.CONACYT-CONAFOR-2008-91633)
文摘Objective:To study antifungal activity of a new ellagitannin isolated from the plant residues of Euphorbia antisyphilitica(E.antisyphilitica)Zucc in the wax extraction process.Methods:An extract was prepared from dehydrated and pulverized residues and fractionated by liquid chromatography on Amberilte XAD-16,until obtained an ellagitannin-rich ethanolic fraction which was treated by rotaevaporation to recover the ellagitannin as fine powder.An aqueous solution was prepared and treated through ionic exchange liquid chromatography(Q XL)and gel permeation chromatography(G 25).The ellagitannin-rich fraction was thermogravimetrically evaluated(TGA and DTA)to test the thermo-stability of ellagic acid(monomeric unit).Then ellagitannin powder was analyzed by infrared spectrospcopy to determinate the functional groups and.also mass spectroscopy was used to determine the molecular ion.Results:The principal functional groups of ellagitannin were determined,the molecular weight was 860.7 g/mol;and an effective antifungal activity against phytopathogenic fungi was demonstrated.Conclusions:It can be concluded that the new ellagitannin(860.7 g/mol)isolated from E.antisyphilitica Zucc is an effective antifungal agent against Alternaria alternata,Fusarium oxyzporum,Colletotrichum gloeosporoides and Rhizoctnia solani.
基金Supported by the National Science Centre,No.2017/26/D/NZ7/00748。
文摘Urolithin A(UA)is a metabolic compound generated during the biotransformation of ellagitannins by the intestinal bacteria.The physiologically relevant micromolar concentrations of UA,achieved in the plasma and gastrointestinal tract(GI)after consumption of its dietary precursors,have been revealed to offer GI protection.The health benefit has been demonstrated to be principally related to anticancer and anti-inflammatory effects.UA has been shown to possess the capability to regulate multiple tumor and inflammatory signaling pathways and to modulate enzyme activity,including those involved in carcinogen biotransformation and antioxidant defense.The purpose of this review is to gather evidence from both in vitro and in vivo studies showing the potential of UA in GI protection alongside suggested mechanisms by which UA can protect against cancer and inflammatory diseases of the digestive tract.The data presented herein,covering both studies on the pure compound and in vivo generated UA form its natural precursor,support the potential of this metabolite in treatment interventions against GI ailments.
文摘Objective: To determinate the recovery of total polyphenolic compounds content,in vitro antioxidant activity and HPLC/ESI/MS characterization of extract from Nephelium lappaceum L.(Mexican rambutan).Methods: The rambutan husk extract was obtained by aqueous extraction and a polyphenolic fraction was recovered using Amberlite XAD-16. The total polyphenolic compounds content was determined by the Folin Ciocalteu and butanol-HCI methods.In vitro antioxidant activity was performed using ABTS and ferric reducing antioxidant power methods.Results: Mexican rambutan husk showed a total polyphenolic content of 582 mg/g and an evident antioxidant activity by ABTS and ferric reducing antioxidant power analysis.The HPLC/ESI/MS assay allowed the identification of 13 compounds, most of which belong to ellagitannins. Geraniin, corilagin and ellagic acid were present in the sample;the mineral composition was also evaluated.Conclusions: Rambutan husk cultivated in Mexico is a promising source for the recovery of added value bioactive compounds with antioxidant activity, which have potential applications as bioactive antioxidant agents for the treatment of diseases.
