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Nutrition and Disease

A Mixture of the Salacia reticulata (Kotala himbutu) Aqueous Extract and Cyclodextrin Reduces the Accumulation of Visceral Fat Mass in Mice and Rats with High-Fat Diet–Induced Obesity^1,2

Eriko Kishino^*,3, Tetsuya Ito^*, Koki Fujita^* and Yoshihiro Kiuchi

^* Bio Research Corporation of Yokohama, 1-1-1 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan and Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan

³ To whom correspondence should be addressed. E-mail: eri.k{at}ensuiko.co.jp.

The effects of a mixture of the Salacia reticulata (Kotala himbutu) aqueous extract and cyclodextrin (SRCD) on the development of obesity were examined. We studied the effects of SRCD on the elevation of plasma triacylglycerol levels induced by oral administration of a high-fat (HF) liquid diet to male Sprague-Dawley rats. The plasma triacylglycerol concentration was significantly lower in the SRCD-treated rats than in the control rats 4 h after HF diet administration (P < 0.05). In a study of female C57BL/6 mice that consumed a solid HF diet containing 0, 0.2 or 0.5% SRCD ad libitum for 8 wk, the increases in body weight and visceral fat mass were less in those fed the diet supplemented with 0.5% SRCD than in those fed the HF diet (P < 0.05). In male Sprague-Dawley rats fed a solid HF diet with or without 0.2% SRCD and restricted in energy intake to that of rats fed a normal diet for 35 d, the increases in body weight and visceral fat mass were smaller in the SRCD-supplemented rats (P < 0.05). In addition, the energy efficiency and the plasma leptin and adiponectin concentrations were lower in the mice and rats that were administered SRCD than in those fed the HF diet alone (P < 0.05). The inhibitory effects of SRCD on HF diet–induced obesity may be attributable to the inhibition of carbohydrate and lipid absorption from the small intestine. Therefore, SRCD may suppress the accumulation of visceral fat and the glucose intolerance that accompany this type of obesity.

KEY WORDS: • cyclodextrin • high-fat diet • mice and rats • Salacia reticulata • visceral fat mass.

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