Seitoku University is a Japanese women's university in Matsudo, Chiba. It has faculties of Childhood Education, Literature and Social science, Music, and Nutrition, as well as an affiliated Junior College. It was founded in 1990 and is accredited by the Japanese Ministry of Education.It was named after the 7th-century regent Shōtoku. Shō can also be read sei , the latter was chosen for this school. Wikipedia.
Yokoi K.,Chiba University |
Yokoi K.,Seitoku University |
Konomi A.,Chiba University |
Konomi A.,Teikyo Heisei University
Regulatory Toxicology and Pharmacology | Year: 2012
The UK Food Standards Agency and its counterparts in other countries have warned consumers not to eat hijiki (Sargassum fusiforme; synonym Hizikia fusiformis), a Sargasso seaweed, because it contains large amounts of inorganic arsenic. We investigated dietary exposure of hijiki in weaning male F344/N rats fed an AIN-93G diet supplemented with 3% (w/w) hijiki powder for 7. weeks, compared with those fed only an AIN-93G diet. Body weight, body temperature, blood and tissue arsenic concentrations, plasma biochemistry and hematological parameters were measured. We found that feeding rats a 3% hijiki diet led to a marked accumulation of arsenic in blood and tissues, and evoked a high body temperature and abnormal blood biochemistry including elevated plasma alkaline phosphatase activity and inorganic phosphorus, consistent with arsenic poisoning. These findings should prompt further investigations to identify the health hazards related to consumption of hijiki and related Sargassum species in humans. © 2012 Elsevier Inc.
Hibi M.,Kao Corporation |
Masumoto A.,Ochanomizu University |
Naito Y.,Ochanomizu University |
Kiuchi K.,Ochanomizu University |
And 5 more authors.
American Journal of Physiology - Regulatory Integrative and Comparative Physiology | Year: 2013
The increase in obesity and lipid disorders in industrialized countries may be due to irregular eating patterns. Few studies have investigated the effects of nighttime snacking on energy metabolism. We examined the effects of nighttime snacking for 13 days on energy metabolism. Eleven healthy women (means SD; age: 23 1 yr; body mass index: 20.6 2.6 kg/m2) participated in this randomized crossover trial for a 13-day intervention period. Subjects consumed a specified snack (192.4 18.3 kcal) either during the daytime (10:00) or the night time (23:00) for 13 days. On day 14, energy metabolism was measured in a respiratory chamber without snack consumption. An oral glucose tolerance test was performed on day 15. Relative to daytime snacking, nighttime snacking significantly decreased fat oxidation (daytime snacking: 52.0 13.6 g/day; nighttime snacking: 45.8 14.0 g/day; P 0.02) and tended to increase the respiratory quotient (daytime snacking: 0.878 0.022; nighttime snacking: 0.888 0.021; P 0.09). The frequency of snack intake and energy intake, body weight, and energy expenditure were not affected. Total and low-density lipoprotein (LDL) cholesterol significantly increased after nighttime snacking (152 26 mg/dl and 161 29 mg/dl; P 0.03 and 76 20 mg/dl and 83 24 mg/dl; P 0.01, respectively), but glucose and insulin levels after the glucose load were not affected. Nighttime snacking increased total and LDL cholesterol and reduced fat oxidation, suggesting that eating at night changes fat metabolism and increases the risk of obesity. © 2013 the American Physiological Society.
Munezawa T.,Nihon University |
Kaneita Y.,Nihon University |
Osaki Y.,Tottori University |
Kanda H.,Fukushima Medical University |
And 7 more authors.
Sleep | Year: 2011
Study Objective: The objective of this study was to examine the association between the use of mobile phones after lights out and sleep disturbances among Japanese adolescents. Design and Setting: This study was designed as a cross-sectional survey. The targets were students attending junior and senior high schools throughout Japan. Sample schools were selected by cluster sampling. Self-reported anonymous questionnaires were sent to schools for all students to fill out. Participants: A total of 95,680 adolescents responded. The overall response rate was 62.9%, and 94,777 questionnaires were subjected to analysis. Intervention: N/A Measurements and Results: Daily mobile phone use, even if only for a brief moment every day, was reported by 84.4%. Moreover, as for use of mobile phones after lights out, 8.3% reported using their mobile phone for calling every day and 17.6% reported using it for sending text messages every day. Multiple logistic regression analysis showed that mobile phone use for calling and for sending text messages after lights out was associated with sleep disturbances (short sleep duration, subjective poor sleep quality, excessive daytime sleepiness, and insomnia symptoms) independent of covariates and independent of each other. Conclusion: This study showed that the use of mobile phones for calling and for sending text messages after lights out is associated with sleep disturbances among Japanese adolescents. However, there were some limitations, such as small effect sizes, in this study. More studies that examine the details of this association are necessary to establish strategies for sleep hygiene in the future.
Konomi A.,Seitoku University |
Konomi A.,Aichi Gakusen University |
Yokoi K.,Seitoku University
British Journal of Nutrition | Year: 2011
Patients with Fe-deficiency anaemia are often afflicted by hypotension. However, the mechanism of secondary hypotension in Fe-deficiency anaemia is unknown. To investigate the pathogenesis of secondary hypotension in Fe-deficiency anaemia, we examined the effects of Fe deprivation on plasma aldosterone concentration and blood pressure in rats. A total of forty 4-week-old male Sprague-Dawley rats were assigned into four treatment groups of ten each for the 4-week study: Fe-deficient group (FD), Zn-deficient group (ZD), Fe/Zn-deficient group (FZD) and control group (CON). At days 26 and 27, blood pressure was measured by the tail-cuff method. Plasma aldosterone concentration was determined by ELISA. The data were analysed by Tukey's multiple comparison test. Rats in the FZD had significantly lower mean blood pressure (P<001) and diastolic blood pressures (P<005) and plasma aldosterone concentration (P<001) compared to the CON. These results suggest that blood pressure is decreased in Fe-deficiency anaemia combined with Zn deficiency partly due to decreased circulating aldosterone concentrations in addition to decreased haematocrit. © 2010 The Authors.
Komatsuzaki N.,Seitoku University |
Shima J.,Kyoto University
Bioscience, Biotechnology and Biochemistry | Year: 2012
The protective effects of live Lactobacillus paracasei NFRI 7415 on alcoholic liver disease were investigated. Male Fischer 344 rats were fed a control diet (CD), an ethanol diet (ED) (35.8% of total energy from ethanol), or an ethanol diet containing 20% live Lb. paracasei NFRI 7415 (10 7 cfu/g) (LD) for 10 weeks. The results indicated that live Lb. paracasei NFRI 7415 reduced the total cholesterol concentration of the plasma and liver in the rats fed the LD. The level of docosahexaenoic acid (DHA; 22:6n-3) in the plasma and liver of the LD group was higher than in the ED group. Chronic alcohol consumption decreased the level of n-3 fatty acid in the plasma and liver of the ED group. These results indicated that live Lb. paracasei NFRI 7415 can adjust the fatty acid composition of the plasma and liver, and that it is possible to decrease liver damage due to chronic alcohol intake. © 2012 W. S. Maney & Son Ltd.
Hayashi T.,Seitoku University |
Midorikawa M.,Seitoku University
Nippon Shokuhin Kagaku Kogaku Kaishi | Year: 2011
Japanese people are concerned about internal exposure to radiation through the consumption of contaminated food and water and external exposure due to environmental contamination. Using the coefficient of 0.05 Sv ?1 for the overall risk of dying from cancer and radiation doses derived from Cs-134, Cs-137 and I-131, the degree of exposure and risks were evaluated for different levels of radioactive contamination. Our results showed that the risk of internal exposure is less significant compared with that of external exposure in areas with relatively high dose rates, or so-called radioactive hot spots. Appropriate monitoring of radioactive contamination of food and disclosing the results are prerequisite for ensuring food safety and human health.
Nakashima Y.,Seitoku University |
Yokokura A.,Seitoku University
Journal of Nutritional Science and Vitaminology | Year: 2010
To investigate whether preferential fat intake by adult rats could be linked to fat-feeding of rats during the growth period, this paper describes the next two studies. Three groups of 4-wk-old male rats in study 1 received one of three diets: control diet (CTD), lowfat high-carbohydrate diet (LFD), and high-fat low-carbohydrate diet (HFD). After 6 wk (dietary treatment period), 6 rats in each of the groups were sacrificed and the remaining rats were placed on a self-selection regimen of fat-protein diet (FPD) and carbohydrate-protein diet (CPD) for 3 wk (self-selection period). After the dietary treatment period, liver weight and plasma insulin concentration of the LFD group and perirenal fat tissue weight and plasma triacylglycerol and leptin concentrations of the HFD group were higher than those of the CTD group. Although no significant difference in fat energy ratio (F ratio) of combination diets self-selected by the three groups was observed, the F ratios of the combination diets were higher than that of the CTD. After the self-selection period, liver weight and plasma insulin concentration of the LFD group and plasma triacylglycerol concentrations of the HFD group decreased. These data suggested that the dietary selection pattern of the rats was associated with a reduced basal plasma insulin concentration. Three groups of rats in study 2 were placed on a self-selection regimen of the LFD and the HFD after being fed one of three diets (LFD, CTD and HFD) for 6 wk. Although the F ratio of the combination diet consumed by the CTD and the LFD groups was similar to that of the combination diet consumed by rats in study 1, the F ratio of the combination diet consumed by the HFD group was higher than that of other groups. These findings suggest that consumption of the fatty food during the growth period predisposed them to favorably respond to the diet that had become familiar to them in later life.
Yokoi K.,Seitoku University
Journal of Trace Elements in Medicine and Biology | Year: 2014
Iron requirements were estimated from the results of the National Health and Nutrition Surveys of Japan 2003-2007 using the numerical analysis of requirements based on an integral equation. The numerical analysis used population-based data on iron nutriture, the prevalence of inadequate iron status, and the distribution of iron intakes. The cutoff value for inadequate iron status was defined as a serum ferritin concentration <30. ng/mL. Iron intakes and menstrual blood losses followed a log-normal distribution and published values were corrected accordingly to calculate usual values. For women aged 18-29 years old, the median of the estimated median iron requirement (corresponding to the estimated average requirement by using the terminology of the dietary reference intakes) was 7.59. mg (range, 6.86-8.11). The median of the estimated usual iron intake covering the needs of women with 80. mL per cycle of menstrual blood loss was 11.27. mg (range, 10.16-12.00), and the median of the usual iron intake covering the needs of 97.7% of women was 13.93. mg (range, 12.55-14.81). For women aged 30-49 years old, the corresponding figures were 8.13. mg (range, 7.96-8.69), 11.95. mg (range, 11.72-12.77), and 14.71. mg (range, 14.44-15.72). © 2014 Elsevier GmbH.
Nakashima Y.,Seitoku University
Journal of Nutritional Science and Vitaminology | Year: 2011
To investigate the change in preference for a low-fat diet (LFD) and a high-fat diet (HFD) under disorders induced by a zinc (Zn)-deficiency, two groups of 4-wk-old male rats were fed a two-choice diet of Zn-deficient (ZnD; 0.75 mg/kg) and Zn-adequate (ZnA; 30.75 mg/kg) LFD and HFD. After 21 d, 10 rats in each of the two groups were sacrificed. The remaining ZnD rats were switched to ZnA diets for 7 d. Intakes of the LFD and the HFD were measured to determine the diet preferences of the ZnD, the ZnA and the Zn-recovered groups. Energy intake of the ZnD group was significantly lower than that of the ZnA group and showed cyclical 3- to 4-d patterns of decrease. In the ZnD group, although the LFD intake decreased parallel to the reduction in the energy intake, the HFD intake did not show the cyclical pattern of decrease. The reduced intake of the LFD in the ZnD rats was accompanied by a low carbohydrate intake and a low plasma insulin concentration. When the ZnD group recovered sufficient amounts of Zn, the energy intake was restored to normal levels and the difference in the LFD intake and the plasma insulin concentration disappeared between the ZnD and the ZnA groups. It was supposed that the specific change in the LFD intake patterns during development and recovery from Zn-deficiency might be related to Znmediated changes in impaired synthesis and the release of insulin from the pancreas.
Sawada T.,Morioka College |
Yokoi K.,Seitoku University
European Journal of Clinical Nutrition | Year: 2010
The relation of zinc (Zn) nutriture to brain development and function has been elucidated. The purpose of this study is to examine whether Zn supplementation improves mood states in young women. The study used a double-blind, randomized and placebo-controlled procedure. The major outcomes were psychological measures, somatic symptoms and serum Zn. Thirty women were placed randomly and in equal numbers into two groups, and they ingested one capsule containing multivitamins (MVs) or MV and 7 mg Zn daily for 10 weeks. Women who took MV and Zn showed a significant reduction in anger-hostility score (P=0.009) and depression-dejection score (P=0.011) in the Profile of Moods State (POMS) and a significant increase in serum Zn concentration (P0.008), whereas women who took only MV did not. Our results suggest that Zn supplementation may be effective in reducing anger and depression. © 2010 Macmillan Publishers Limited All rights reserved.