• Title/Summary/Keyword: nutraceuticals

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Enhancing Activity of Anticancer Drugs in Multidrug Resistant Tumors by Modulating P-Glycoprotein through Dietary Nutraceuticals

  • Khan, Muhammad;Maryam, Amara;Mehmood, Tahir;Zhang, Yaofang;Ma, Tonghui
    • Asian Pacific Journal of Cancer Prevention
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    • v.16 no.16
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    • pp.6831-6839
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    • 2015
  • Multidrug resistance is a principal mechanism by which tumors become resistant to structurally and functionally unrelated anticancer drugs. Resistance to chemotherapy has been correlated with overexpression of p-glycoprotein (p-gp), a member of the ATP-binding cassette (ABC) superfamily of membrane transporters. P-gp mediates resistance to a broad-spectrum of anticancer drugs including doxorubicin, taxol, and vinca alkaloids by actively expelling the drugs from cells. Use of specific inhibitors/blocker of p-gp in combination with clinically important anticancer drugs has emerged as a new paradigm for overcoming multidrug resistance. The aim of this paper is to review p-gp regulation by dietary nutraceuticals and to correlate this dietary nutraceutical induced-modulation of p-gp with activity of anticancer drugs.

Physicochemical characteristics of El salvadoran Coffea arabica cv. Bourbon coffee extracts with various roasting conditions (로스팅 조건에 따른 엘살바도르산 Coffea arabica cv. Bourbon 커피의 이화학적 특성)

  • Kim, Inyong;Jung, Sunyoon;Kim, Eunkyung;Yun, Hea-Yeon;Zhang, Seokam;Ha, Jung-Heun;Jeong, Yoonhwa
    • Korean Journal of Food Science and Technology
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    • v.52 no.3
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    • pp.212-219
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    • 2020
  • The physicochemical characterstics of El Salvadoran Coffea arabica cv. Bourbon coffee extracts under various roasting conditions were investigated. Green beans were roasted under four different conditions (Light-medium, Medium, Moderately dark, and Very dark). The coffee extracts were prepared by using the espresso or drip methods. As the roasting degree increased, the coffee bean moisture content decreased and the ash content increased. The lightness and yellowness of the beans and coffee extracts decreased along with the increasing roasting degree. In the drip coffee, the reducing sugar content decreased and the pH value increased along with the increasing roasting degree. Both in the espresso and drip coffee, total organic acid and chlorogenic acid contents decreased, while the caffeine content increased along with the increasing roasting degree. Therefore, it is suggested that the roasting degree affects the physicochemical characteristics of coffee extracts.

Inhibitory Activities of Digestive Enzymes and Antioxidant Activities of Fermented Beverages Using Momordica charantia L. (여주를 첨가한 발효음료의 소화효소 억제와 항산화 활성)

  • Park, Suin;Yeo, Seoungsoon;Lee, Youngseung;Jeong, Yoonhwa;Kim, Misook
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.46 no.11
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    • pp.1308-1315
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    • 2017
  • This study was conducted to develop Momordica charantia L. juice fermented by four Lactobacillus species such as Lactobacillus paracasei (LPA), Lactobacillus plantarum (LPL), Lactobacillus rhamnosus (LRH), and Lactobacillus reuteri (LRE) as well as to investigate their inhibitory effects against digestive enzymes and antioxidant activities. Fermentation was performed at $37^{\circ}C$ without nutrient supplementation for 72 h. The pH and total lactic acid contents were within the ranges of 3.75~3.96 and 5.21~10.04% in fermented juices, respectively. The type of starter culture and fermentation time induced changes in flavonoid contents more than total phenolic contents. All juices fermented for 48 h strongly inhibited ${\alpha}$-glucosidase activity with the percentage of inhibition ranging of 91.24~95.05%. Antioxidant activities of all juices mostly increased after 48 h of fermentation. Our results suggest that fermented juice possesses inhibitory activity against digestive enzymes and antioxidant activity, and they can be used as health functional beverages.