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  • Title: Purified blueberry anthocyanins and blueberry juice alter development of obesity in mice fed an obesogenic high-fat diet.
    Author: Prior RL, E Wilkes S, R Rogers T, Khanal RC, Wu X, Howard LR.
    Journal: J Agric Food Chem; 2010 Apr 14; 58(7):3970-6. PubMed ID: 20148514.
    Abstract:
    Male C57BL/6J mice (25 days of age) were fed either a low-fat diet (10% kcal from fat) (LF) or a high-fat diet (45% kcal from fat) (HF45) for a period of 72 days. Blueberry juice or purified blueberry anthocyanins (0.2 or 1.0 mg/mL) in the drinking water were included in LF or HF45 treatments. Sucrose was added to the drinking water of one treatment to test if the sugars in blueberry juice would affect development of obesity. Total body weights (g) and body fat (%) were higher and body lean tissue (%) was lower in the HF45 fed mice compared to the LF fed mice after 72 days, but in mice fed HF45 diet plus blueberry juice or blueberry anthocyanins (0.2 mg/mL), body fat (%) was not different from those mice fed the LF diet. Anthocyanins (ACNs) decreased retroperitoneal and epididymal adipose tissue weights. Fasting serum glucose concentrations were higher in mice fed the HF45 diet. However, it was reduced to LF levels in mice fed the HF45 diet plus 0.2 mg of ACNs/mL in the drinking water, but not with blueberry juice. beta cell function (HOMA-BCF) score was lowered with HF45 feeding but returned to normal levels in mice fed the HF45 diet plus purified ACNs (0.2 mg/mL). Serum leptin was elevated in mice fed HF45 diet, and feeding either blueberry juice or purified ACNs (0.2 mg/mL) decreased serum leptin levels relative to HF45 control. Sucrose in drinking water, when consumption was restricted to the volume of juice consumed, produced lower serum leptin and insulin levels, leptin/fat, and retroperitoneal and total fat (% BW). Blueberry juice was not as effective as the low dose of anthocyanins in the drinking water in preventing obesity. Additional studies are needed to determine factors responsible for the differing responses of blueberry juice and whole blueberry in preventing the development of obesity.
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