Entity

Time filter

Source Type


Yokota J.,Kochi Medical School Hospital | Jobu K.,Kochi Medical School Hospital | Yoshioka S.,Kochi Medical School Hospital | Kashiwagi T.,Kochi University | And 6 more authors.
Food Chemistry | Year: 2013

This study investigated the influence of Goishi-tea on visceral fat weight in induced obese mice. Mice were divided into two main groups, normal and obesity. In obesity group, mice were fed with high-fat diet. Goishi-tea including its fractions (ethyl-acetate layer and water layer) was administrated in normal and obesity three sub-groups. Results showed no influence of Goishi-tea in normal group. However, visceral fat weight, size of adipose cell and cholesterol level were significantly decreased in obesity group fed Goishi-tea compared to control group. Moreover, adiponectin levels tended to increase and adipocytokines has significant values lower in obesity group fed Goishi-tea compared to control group. Interestingly, Goishi tea involved in the high-fat diet induced-obese mice can inhibit fat accumulation and maintain adiponectins without increasing tumor necrosis factor-alpha and interleukin-6. It would be beneficial for the prevention of metabolic syndrome and obesity-related disorder. © 2012 Elsevier Ltd. All rights reserved. Source


Yokota J.,Kochi Medical School Hospital | Jobu K.,Kochi Medical School Hospital | Yoshioka S.,Kochi Medical School Hospital | Moriyama H.,Kochi Prefectural Industrial Technology Center | And 4 more authors.
Nippon Shokuhin Kagaku Kogaku Kaishi | Year: 2011

Much evidence suggests that tea has anti-obesity properties. Studies have been conducted using Goishi tea, a post-fermented tea produced in Otoyo town, Kochi, Japan. As previously reported by Miyamura et al. in 2008, Goishi tea has antioxidant and anti-arteriosclerotic efects. The present study investigated the influence of Goishi tea on visceral fat weight in diet-induced obese mice. Obesity was induced in C57BL/6 J mice by administrations of High-Fat Diet (HFD) for 28 days. We assessed obesity by measuring body weight, blood glucose, triglyceride (TG), total-cholesterol (T-CHO), insulin, internal fat weight and ad-ipocytokine levels. The 28-day study indicated that the body and lipid weights were substantially higher in the HFD group than in the normal diet (ND) group. Intake of Goishi tea was shown to inhibit adipose tissue enlargement. In addition, the level of adiponectin in the Goishi tea group was the same as in the ND group. Goishi tea was also found to control an increase in tumor necrosis factor-a and interleukin-6 in the HFD group. It was suggested that Goishi tea is efective for treatment of metabolic syndrome. Source


Hayama H.,Japan National Agriculture and Food Research Organization | Iwatani A.,Kumamoto Prefectural Agricultural Research Center | Nishimoto T.,Kochi Prefectural Agricultural Research Center | Oya Y.,Tochigi Prefectural Agricultural Experimental Station | Nakamura Y.,Japan National Agriculture and Food Research Organization
Scientia Horticulturae | Year: 2014

We investigated the effects of fruit temperature on the incidence of watercore in Japanese pear 'Niitaka'. To increase the temperatures in the environments of maturing fruit, we fixed electric heating cables around the fruit during the maturation period (6-3 weeks before estimated harvest date). This treatment increased the average temperatures, the daily minimum temperatures, and the daily maximum temperatures by 1.4-2.5. °C, 1.5-2.8. °C, and 0.8-1.7. °C, respectively. The incidences of watercore were statistically increased by heat treatment (P< 0.01). In particular, the incidences of watercore in heated fruit were almost twice those of untreated fruit in Ibaraki in 2008 and Kumamoto in 2009. Furthermore, the fruit treated with higher temperatures showed increased flesh firmness, soluble solids contents, and pH at harvest, although the interactions (treatment × place/year) were also significant. These results imply that parameters of fruit quality, including the occurrence of watercore, are affected by the temperature of fruit during maturation, and that high temperatures give rise to watercore. Accordingly, we attempted to reduce the maximum daily fruit temperatures by putting shade hats over the fruit to see if this would reduce the incidence of watercore. Shade hat treatment decreased the daily maximum temperature by 0.5-2.2. °C during maturation without significantly altering the mean and daily minimum temperatures. Watercore incidence was reduced by shade hats in all experiments, however, the effects were not statistically significant. The temperatures in the tested years were very high, with mean and daily maximum temperatures around control fruit of over 28. °C and 34. °C, respectively. The results of this study suggest that shade hat treatment may not be enough to decrease temperatures around fruit and reduce the incidence of watercore. © 2014 Elsevier B.V. Source


Jobu K.,Kochi Medical School Hospital | Yokota J.,Kochi Medical School Hospital | Yoshioka S.,Kochi Medical School Hospital | Moriyama H.,Kochi Prefectural Industrial Technology Center | And 4 more authors.
Food Research International | Year: 2013

Goishi tea is a post-fermented tea produced in Kochi, Japan. This study aimed to investigate the anti-obesity effect of Goishi tea by using 3T3L-1 cells and mice model. In 3T3L-1 cells, Goishi tea showed a significant stimulatory effect on fat decomposition compared with green tea. The C57BL/6J mice were fed with a high-fat diet to create a diet-induced obesity model for investigating the benefits of Goishi tea. Mice were categorized into 5 groups. Within the high-fat diet groups, body mass, blood glucose and visceral fat mass were found to be lower among the Goishi tea group compared with the tap water groups. Having conducted histological evaluation of adipocytes, an increase in fat was observed in the high-fat diet groups compared with the normal diet groups. The degree of fat increase was smaller among the Goishi tea and green tea groups compared with the tap water groups. Results suggested that Goishi tea had a suppressive effect on fat cell enlargement during the progression of obesity as well as a suppressive effect on factors such as tumor necrosis factor alpha and interleukin-6. In conclusion, Goishi tea is likely effective against diet-induced obesity. © 2013 Elsevier Ltd. Source

Discover hidden collaborations