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      Polifenoles y Actividad Antioxidante del Fruto Liofilizado de Palma Naidi (Açai Colombiano) (Euterpe oleracea Mart) Translated title: Polyphenols and Antioxidant Activity of the Freeze-Dried Palm Naidi (Colombian Açai) (Euterpe oleracea Mart)

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          Abstract

          Euterpe oleracea es una palmera indígena autóctona de América del Sur. El fruto conocido como açaí en Brasil y palma naidi en Colombia, es de gran valor económico para los pueblos nativos. Para los análisis se usó una pulpa liofilizada, proveniente del Pacifico colombiano. Entre los muchos hallazgos, se presenta un alto porcentaje de minerales (6,94%), específicamente sodio, hierro y potasio. La palma naidi es rica en compuestos polifenólicos, tipo antocianinas (268,5 mg Cianidin-3-Glucosido/ 100 g de liofilizado) donde el 95% de las antocianinas corresponden al Cianidin-3-Glucosido (255,1 mg/ 100 g de liofilizado) y de otros compuestos fenólicos como los ácidos fenólicos: ferúlico (10,27 mg/100 g de liofilizado), caféico (7,06 mg/100 g de liofilizado), p-coumárico (2,81 mg/100 g de liofilizado) y menor cantidad clorogénico 0,30 mg/100 g de liofilizado). Los polifenoles contribuyen a la capacidad antioxidante del naidi; medida por las técnicas ABTS, DPPH y FRAP y específicamente un valor ORAC (Hidrofílico (Oxygen Radical Absorbance Capacity) de 98142,0 Micromol Tx/100 g de liofilizado; además un valor ORAC Lipofílico de 3194,1 Micromol Tx/ 100 g de liofilizado. Un valor ORAC total igual a 101336,1 Micromol Tx/ 100 g de liofilizado.

          Translated abstract

          Euterpe oleracea Mart is a native palm tree native of South America. The fruit known as açaí in Brazil and naidi palm in Colombia and is of great economic value to the native peoples. For the analysis was used freeze-dried pulp, from the Colombian Pacific. This fruit has a high percentage of minerals (6.94%), specifically sodium, potassium and iron. Naidi palm is rich in polyphenolic compounds, especially anthocyanins (268.5 mg cyanidin-3-glucoside per 100 g of freeze dried) and phenolic acid as ferulic (10.27 mg/100 g of freeze dried) , caffeic (7.06 mg/100 g of freeze dried), p-Coumaric (2.81 mg/100 g of freeze dried) and fewer chlorogenic (0.30 mg/100 g of freeze dried); which provides high antioxidant activity by the techniques ABTS, DPPH and FRAP and specifically H-ORAC value (Hydrophilic Oxygen Radical Absorbance Capacity) of 98142.0 Micromol Tx /100 g of freeze dried and L-ORAC value (Lipophilic Oxygen Radical Absorbance Capacity) was 3194.1 Micromol Tx /100 g of freeze dried. Total ORAC 101336.1 Micromol Tx /100 g of freeze dried.

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          Total phenolic compounds and antioxidant capacities of major fruits from Ecuador

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            ORAC and TEAC assays comparison to measure the antioxidant capacity of food products

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              Flavonoids from acai (Euterpe oleracea Mart.) pulp and their antioxidant and anti-inflammatory activities.

              Five flavonoids, (2S,3S)-dihyrokaempferol 3-O-β-d-glucoside (1) and its isomer (2R,3R)-dihydrokaempferol 3-O-β-d-glucoside (2) , isovitexin (3), velutin (4) and 5,4'-dihydroxy-7,3',5'-trimethoxyflavone (5), were isolated from acai (Euterpe oleracea Mart.) pulp. The structures of these compounds were elucidated based upon spectroscopic and chemical analyses. To our knowledge, compounds 1, 2, 4 and 5 were identified from acai pulp for the first time. The in vitro antioxidant activities of these compounds were evaluated by the oxygen radial absorbance capacity (ORAC) assay. The ORAC values varied distinctly (4458.0-22404.5μmol Trolox equivalent (TE)/g) from 5,4'-dihydroxy-7,3',5'-trimethoxyflavone (5) to isovitexin (3) and were affected by the numbers/positions of hydroxyl groups, substitute groups, as well as stereo configuration. The anti-inflammatory effects of these compounds were screened by the secreted embryonic alkaline phosphatase (SEAP) reporter assay, which is designed to measure NF-κB activation. Velutin (4) was found to dose-dependently inhibit SEAP secretion in RAW-blue cells induced by LPS, with an IC50 value of 2.0μM. Velutin (4) also inhibited SEAP secretion induced by oxidised LDL, indicating potential athero-protective effects. Copyright © 2011 Elsevier Ltd. All rights reserved.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rfnam
                Revista Facultad Nacional de Agronomía Medellín
                Rev. Fac. Nac. Agron. Medellín
                Facultad de Ciencias Agrarias - Universidad Nacional de Colombia (Medellín, Antioquia, Colombia )
                0304-2847
                December 2011
                : 64
                : 2
                : 6213-6220
                Affiliations
                [05] Medellín orgnameUniversidad Nacional de Colombia orgdiv1Facultad de Minas Colombia
                [04] Medellín orgnameUniversidad Nacional de Colombia orgdiv1Facultad de Ciencias Agropecuarias Colombia
                [01] Medellín orgnameUniversidad Nacional de Colombia orgdiv1Facultad de Ciencias Colombia brojano@ 123456unal.edu.co
                [06] Medellín orgnameUniversidad Nacional de Colombia orgdiv1Facultad de Ciencias Colombia
                [03] Medellín orgnameUniversidad de Antioquia orgdiv1Facultad de Química Farmacéutica Colombia afalzatea@ 123456unal.edu.co
                [02] Medellín orgnameUniversidad de Antioquia orgdiv1Facultad de Ciencias Exactas y Naturales Colombia
                Article
                S0304-28472011000200018
                32dfe557-0dfe-4370-bdcd-1ada8d15e1a9

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

                History
                : 11 August 2011
                : 07 June 2011
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 37, Pages: 8
                Product

                SciELO Colombia

                Categories
                Artículos

                alimentos nutracéuticos,valor ORAC,Free radicals,phytogenetic resources,functional foods,nutraceutical foods,ORAC's value,Radicales libres,recursos fitogenéticos,alimentos funcionales

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