Effects of Western, Vegetarian, and Japanese Dietary Fat Model Diets with or without Green Tea Extract on the Plasma Lipids and Glucose, and Liver Lipids in Mice

Shirai, Nobuyuki; Suzuki, Haruo

doi:10.1159/000077044

Cited by 12 publications

(9 citation statements)

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“…Reports from a number of studies have indicated that an intake of fish oil or 22:6n-3 suppresses plasma Glu content (Shirai and Suzuki, 2004;Kuda et al, 2000;Miura et al, 1997). In our previous study, a significant reduction in plasma Glu content was also seen following an intake of diets containing 3% or more of kazunoko lipids .…”

Section: Discussionsupporting

confidence: 55%

“…A variety of foods, and their components, have been proposed as useful agents in the prevention of the onset of metabolic syndrome (Shirai et al, 2006c;Shirai and Suzuki, 2003;Kao et al, 2006;Borek, 2006;Murakami et al, 2005). In particular, there is evidence that intake of fish oil containing eicosapentaenoic acid (20:5n-3) and docosahexaenoic acid (22:6n-3) may help prevent CHD and diabetes (Ebbesson et al, 2005;Lombardo and Chicco, 2006;Shirai and Suzuki, 2004;Carpentier et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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A Comparative Study of Lipids Extracted from Herring Roe Products and Fish Oil on Plasma Glucose and Adipocytokine Levels in ICR Aged Mice

Shirai

Higuchi

Suzuki

2008

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Male mice (11 months old) were fed 5% lard, fish oil, or kazunoko (salted fish roe product) lipids for 4 months to investigate the effects of diet on plasma glucose and adipocytokines. Plasma glucose levels were significantly lower in the fish oil group than in the lard group and there was a non-significant tendency towards lower levels in the kazunoko lipid group. Plasma leptin and adiponectin levels were also significantly higher in fish oil group than in lard group and resistin levels were significantly lower in the kazunoko lipid group than the lard group, but not the fish oil group. The results suggest that kazunoko lipids might be effective as a dietary component in the prevention of coronary heart disease and diabetes even though the metabolic effects of kazunoko lipids were different from those of fish oil.

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Section: Discussionsupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Lipids Extracted from Herring Roe Products and Fish Oil on Plasma Glucose and Adipocytokine Levels in ICR Aged Mice

Shirai

Higuchi

Suzuki

2008

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“…Nonetheless, it is clear that dietary fish and green tea have health benefits. Moreover, some studies have shown that simultaneous ingestion of fish and green tea promotes health more effectively than either alone (Giunta et al, 2010;Shirai and Suzuki, 2004a, 2004b, suggesting that GTE could be consumed to maximize the health benefits of fish.…”

Section: Discussionmentioning

confidence: 99%

Simultaneous Effects of Green Tea Extracts and Fish Oil on Mercury Accumulation and Antioxidant Defenses in Methylmercury-exposed Adult Mice

Shirai

Yamashita

2013

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Male mice (4 months old) were fed green tea extract-(GTE; 0.25% w/w) and/or fish oil-(FO; 5% w/w) containing diets with 8 ppm methylmercury (MeHg) chloride for 4 months to investigate the effects of simultaneous intakes on brain functions, antioxidant defenses against MeHg, and MeHg accumulation in tissues. In mouse maze tests, intake of GTE or FO significantly improved the learning ability of MeHg-exposed mice. GTE and FO also significantly decreased liver and brain catalase activities in MeHg-exposed mice. Total Hg concentrations in muscle were significantly lowered by dietary GTE and FO in the MeHgexposed group, though no remarkable differences were observed in the brain. These data indicate that simultaneous intake of GTE and FO effectively prevents MeHg-mediated oxidative stress and reduces the effects of Hg exposure with fish consumption.Keywords: fish oil, green tea, methylmercury, ascorbic acid, thiobarbituric acid reactive substances *To whom correspondence should be addressed. E-mail: nshinya@affrc.go.jp IntroductionFish contains several nutrients that are beneficial to human health. However, fish has been known to contain hazardous components such as methylmercury (MeHg), which has been linked to decreased neuropsychological function and increased risk of cardiovascular diseases (Choi et al., 2009;Virtanen et al., 2007). In contrast, n-3 polyunsaturated fatty acids (PUFA) contained in fish improve brain function (Guesnet et al., 2011;Mourek and Mourek, 2011) and reduce the risk of cardiovascular diseases (Cottin et al., 2011). Some reports indicate that dietary fat can influence oxidative DNA damage, nephrotoxicity, and steroidogenic enzyme activities after MeHg exposure (Grotto et al., 2011;Jin et al., 2008Jin et al., , 2009McVey et al., 2008). However, the human diet varies widely, and some reports have shown that foodstuffs other than seafood may also prevent MeHg toxicity and accumulation (Abdalla et al., 2010;Farina et al., 2005;Lee et al., 1999;Rowland et al., 1986;Sumathi et al., 2012). Therefore, daily fish consumption may alleviate relatively few health risks.In general, the Japanese drink a few cups of green tea every day, and often accompany sushi meals with green tea. Therefore, a close relationship exists between green tea and fish oil in the Japanese diet. Canuel et al. (2006) concluded that tea might accelerate the enterohepatic MeHg cycle and contribute to temporary MeHg bioamplification in the bloodstream. Green tea contains large quantities of polyphenols that have antioxidant effects and accelerate cadmium (Cd) excretion by forming chelates (Abib et al., 2011;Yu et al., 2007;Wang et al., 2012). Some studies indicate that green tea consumption reduces the risk of coronary heart disease (Bøhn et al., 2012;Chacko et al., 2010) and prevents agerelated neurodegeneration (Andrade and Assunção, 2012). Thus, these green tea polyphenol properties may be effective against MeHg toxicity.The aim of this study was to determine the interactive influence of fish oil and green tea on the effects o...

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“…Indeed, the drinking of green tea by the Japanese might be a factor in preventing the onset of type 2 DM [74].…”

Section: Hypoglycemic Effect Of Green Tea In Diabetes Mellitusmentioning

confidence: 99%

Hypoglycemic Property of Ginger and Green Tea and their Possible Mechanisms in Diabetes Mellitus

Salim¹

2014

TOPROCJ

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Diabetes mellitus disease is increasing rapidly and the incidences in 2010 were about 285 million people worldwide. This is projected to increase to 438 million in 2030. The conventionally used drugs possess many side effects. In addition, the cost of modern antidiabetic drugs is beyond the reach of most people with a low income. Because of this, the need for alternatives that are effective, cheap, and safe is very common.Plants and many plant derived preparations have long been used as traditional remedies for the treatment of diabetes in many parts of the world. Recently, ginger (Zingiber officinale) and green tea (Camellia sinensis) have been widely studied to assess their beneficial effects in treatment and prevention of diabetes mellitus. In vitro and in vivo studies evidenced the potential of ginger and green tea to normalize blood glucose level in diabetes mellitus. In this article we reviewed the various mechanisms through which ginger and green tea exert their hypoglycemic effect. Their pharmacokinetics and safety were also discussed. Results from previous studies revealed that ginger and green tea share some mechanisms of action to reduce blood glucose level in diabetes mellitus. Pharmacokinetics studies provided ample information about their absorption, distribution, and metabolism. Toxicological data exhibited their safety as complementary antidiabetic agents; therefore, a study on the administration of these two herbs simultaneously may be needed as they may exhibit a potential hypoglycemic action due to their synergistic or additive mechanisms of action in diabetes mellitus.

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Effects of Western, Vegetarian, and Japanese Dietary Fat Model Diets with or without Green Tea Extract on the Plasma Lipids and Glucose, and Liver Lipids in Mice

Cited by 12 publications

References 46 publications

A Comparative Study of Lipids Extracted from Herring Roe Products and Fish Oil on Plasma Glucose and Adipocytokine Levels in ICR Aged Mice

A Comparative Study of Lipids Extracted from Herring Roe Products and Fish Oil on Plasma Glucose and Adipocytokine Levels in ICR Aged Mice

Simultaneous Effects of Green Tea Extracts and Fish Oil on Mercury Accumulation and Antioxidant Defenses in Methylmercury-exposed Adult Mice

Hypoglycemic Property of Ginger and Green Tea and their Possible Mechanisms in Diabetes Mellitus

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