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Comparison of bioactive compounds, antioxidant and antiproliferative activities of Mon Thong durian during ripening
(2010-02-01)
Haruenkit, Ratiporn
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Poovarodom, Sumitra
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Vearasilp, Suchada
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Namiesnik, Jacek
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Sliwka-Kaszynska, Magda
The aim of this investigation was to compare the bioactive and nutrient compounds, fatty acids, and antioxidant and antiproliferative activities of Mon Thong durian at different stages of ripening. It was found that the total polyphenols, flavonoids, flavanols, ascorbic acid, tannins and the antioxidant activity determined by four assays (CUPRAC, DPPH, ABTS and FRAP) differed in immature, mature, ripe and overripe samples. The content of polyphenols and antioxidant activity were the highest in overripe durian, flavonoids were the highest in ripe durian, and flavanols and antiproliferative activity were the highest in mature durian (p < 0.05). FTIR spectra of polyphenols, HPLC profiles of fatty acids, the antioxidant and antiproliferative activities can be used as indicators to characterise different stages of durian ripening. © 2009 Elsevier Ltd. All rights reserved.
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The comparative characteristics of snake and kiwi fruits
(2009-08-01)
Gorinstein, Shela
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Haruenkit, Ratiporn
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Poovarodom, Sumitra
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Park, Yong Seo
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Vearasilp, Suchada
In the time of globalization many of the tropical fruits can be find at the markets of Europe and North America. Most customers are not familiar with the nutritional and proliferative values of these fruits. Therefore, a less known snake fruit was compared with better known kiwi fruit, using fluorometry, FT-IR spectroscopy, several radical scavenging and proliferative assays and statistical evaluation. It was found similarity between snake fruit (cultivar Sumalee) and kiwi fruit (cultivar Hayward) in the contents of polyphenols (8.15-7.91, mg GAE g<sup>-1</sup> DW), antioxidant values by DPPH (11.28-10.24, μMTE g<sup>-1</sup> DW), and antiproliferative activities on both human cancer cell lines (Calu-6 for human pulmonary carcinoma, and SMU-601 for human gastric carcinoma, 90.5-87.6 and 89.3-87.1%, cell survival, respectively). In conclusion, snake fruit cultivar Sumalee is comparable with kiwi fruit cultivar Hayward. Two fruits can be used as supplements to the normal diet. Consumption of a combination of both fruits could be recommended in order to receive the best results. © 2009 Elsevier Ltd. All rights reserved.
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Two exotic fruits positively affect rat's plasma composition
(2007-01-01)
Leontowicz, Maria
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Leontowicz, Hanna
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Drzewiecki, Jerzy
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Jastrzebski, Zenon
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Haruenkit, Ratiporn
The aim of this investigation was to determine the bioactive compounds and the antioxidant potentials of Snake fruit and Mangosteen and their influence on plasma lipid levels and antioxidant activity in rats fed cholesterol-containing diets. It was found that total polyphenols and antioxidant potentials of Snake fruit were significantly higher than those of Mangosteen (P < 0.05). A cholesterol-containing diet supplemented with the studied exotic fruits showed a positive affect on rat's plasma lipid levels and on the antioxidant activity during 30 days of feeding. In rat's plasma of the Chol/Snake diet group, the fibrinogen fraction showed a decrease in the amounts and compositions of electrophoretic protein bands in the range of 110 and 14 kDa. However, all the positive results of this experiment on animals could not be automatically applied to humans. © 2006 Elsevier Ltd. All rights reserved.
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In vitro studies of polyphenols, antioxidants and other dietary indices in kiwifruit (Actinidia deliciosa)
(2006-02-01)
Park, Yong Seo
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Jung, Soon Teck
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Kang, Seong Gook
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Drzewiecki, Jerzy
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Namiesnik, Jacek
The main aim of the present study was the evaluation of proteins and antioxidant potential in ethylene-treated kiwifruit during the first 10 days of ripening. Kiwifruit samples were randomly divided into two groups: treated and untreated. Flesh firmness, sensory value, visual score, free sugars, soluble solids, ethylene biosynthesis, proteins, dietary fibers, total polyphenols and antioxidant potential were determined in both groups. Ethylene (100 ppm) at 20°C for 24 h was used in the treated group. The flesh firmness and acidity in treated samples decreased significantly in the early stage of ripening simultaneously with significant increase in the contents of free sugars, soluble solids, endogenous ethylene production, sensory value, 1-aminocyclopropane-1-carboxylic acid (ACC) content, ACC synthase and ACC oxidase activities, total polyphenols and related antioxidant potential, and was significantly higher than in untreated samples (P < 0.05). Proteins were extracted from kiwifruit and separated by modified sodium dodecyl sulphate polyacrylamide gel electrophoresis. The separation was resolved into 14 protein bands. Some minor quality changes were found only in the 32 kDa band, which was more pronounced in the treated samples. In conclusion, ethylene treatment of kiwifruits leads to positive changes in most of the studied kiwifruit compounds and to an increase in the fruit antioxidant potential. It shortens the ripening time and improves fruit quality by decreasing its flesh firmness and acidity. Some minor changes in the protein profile did not affect the fruit taste and quality.
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Fresh Israeli Jaffa blond (Shamouti) orange and Israeli Jaffa red star ruby (Sunrise) grapefruit juices affect plasma lipid metabolism and antioxidant capacity in rats fed added cholesterol
(2004-07-28)
Gorinstein, Shela
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Leontowicz, Hanna
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Leontowicz, Maria
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Krzeminski, Ryszard
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Gralak, Mikolaj
The bioactivity of Israeli Jaffa blond (Shamouti) fresh orange and Israeli Jaffa red Star Ruby (Sunrise) grapefruit juices was investigated in vitro and in vivo. The contents of bioactive compounds of these juices were determined. The influence of bioactive compounds on plasma lipids and plasma antioxidant activity in rats fed cholesterol-containing and cholesterol-free diets was assessed. Significant differences in the contents of dietary fibers were not found. The contents of total polyphenols, flavonoids, and anthocyanins in fresh orange and grapefruit juices were 962.1 ± 27.2 and 906.9 ± 27.1; 50.1 ± 3.3 and 44.8 ± 3.2; and 69.9 ± 5.6 and 68.7 ± 5.5 μg/mL, respectively. The antioxidant potential measured by the scavenging activity against nitric oxide, the β-carotene-linoleate model system (β-carotene), and the 1,1-diphenyl-2-picrylhydrazyl and 2,2′-azino-bis(3-ethyl-benzothiazoline-6-sulfonic acid) diamonium salt assays was higher in orange juice but not significantly. A high level of correlation between contents of total polyphenols and flavonoids and antioxidant potential values of both juices was found. Diets supplemented with orange and to a lesser degree with grapefruit juices improved plasma lipid metabolism only in rats fed added cholesterol. However, an increase in the plasma antioxidant activity was observed in both groups. In conclusion, fresh orange and grapefruit juices contain high quantities of bioactive compounds, which guarantee their high antioxidant potential, and the positive influence on plasma lipid metabolism and plasma antioxidant activity could make fresh orange and grapefruit juices a valuable supplement for disease-preventing diets.

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