The objective of the research was to investigate the effect of polyethylene glycol (PEG) or urea supplementation in sheep and goats fed a basal diet of Acacia saligna and wheat straw. The 3 dietary treatments were: (1) Control: ad libitum A. saligna+ 400 g/d wheat straw (95% DM) (basal diet); (2) Basal diet+50 g/d PEG 4000; and (3) Basal diet+1% (on a DM basis) urea sprayed onto the straw and A. saligna 30 min prior to feeding. All animals maintained live weight, regardless of the dietary treatment. All sheep readily consumed the A. saligna in preference to straw. In sheep both DMD and OMD were higher (p<0.05) where PEG was included in the diet compared to the other two treatments. Contrary to findings by other researchers there was no significant difference in DMI, DMD or OMD between sheep and goats in corresponding treatment groups. All animals were in positive N balance. For both sheep and goats, rumen ammonia concentrations were increased with the use of either urea or PEG. In these groups the maximum ammonia concentrations exceeded 50 mg/L, considered the minimum required to maximise microbial growth. This threshold, however, was exceeded only for a period of 8-11 h. Of those measured, rumen ammonia levels were generally the highest at 4 h post feeding. None of the measurements of rumen ammonia for the control group approached 50 mg/L. It is unclear how and why feed intake and live weight were maintained when rumen ammonia levels were often sub-optimal.
Ju, Jihyeung;Kwak, Youngeun;Hao, Xingpei;Yang, Chung S.
Nutrition Research and Practice
/
v.6
no.5
/
pp.396-404
/
2012
The aim of the study was to investigate the inhibitory effects of calcium against intestinal cancer in vitro and in vivo. We first investigated the effects of calcium treatment in HCT116 and HT29 human colon cancer cells. At the concentration range of 0.8-2.4 mM, calcium significantly inhibited cell growth (by 9-29%), attachment (by 12-26%), invasion (by 15-31%), and migration (by 19-61%). An immunofluorescence microscope analysis showed that the treatment with calcium (1.6 mM) for 24 h increased plasma membrane ${\beta}$-catenin but decreased nuclear ${\beta}$-catenin levels in HT29 cells. We then investigated the effect of dietary calcium on intestinal tumorigenesis in $Apc^{Min/+}$ mice. Mice received dietary treatment starting at 6 weeks of age for the consecutive 8 weeks. The basal control diet contained high-fat (20% mixed lipids by weight) and low-calcium (1.4 mg/g diet) to mimic the average Western diet, while the treatment diet contained an enriched level of calcium (5.2 mg calcium/g diet). The dietary calcium treatment decreased the total number of small intestinal tumors (by 31.4%; P < 0.05). The largest decrease was in tumors which were ${\geq}$ 2 mm in diameter, showing a 75.6% inhibition in the small intestinal tumor multiplicity (P < 0.001). Immunohistochemical analysis showed significantly reduced nuclear staining of ${\beta}$-catenin (expressed as nuclear positivity), but increased plasma membrane staining of ${\beta}$-catenin, in the adenomas from the calcium-treated groups in comparison to those from the control group (P < 0.001). These results demonstrate intestinal cancer inhibitory effects of calcium both in human colon cancer cells and $Apc^{Min/+}$ mice. The decreased ${\beta}$-catenin nuclear localization caused by the calcium treatment may contribute to the inhibitory action.
This study evaluated the protective effects of ginseng leaf extract (GLE) against high fat-diet-induced hyperglycemia and hyperlipidemia, and explored the potential mechanism underlying these effects in C57BL/6J mice. The mice were randomly divided into four groups: normal control, high fat diet control (HFD), GLE-treated at 250 mg/kg, and GLE-treated at 500 mg/kg. To induce hyperglycemic and hyperlipidemic states, mice were fed a high fat diet for 6 weeks and then administered GLE once daily for 8 weeks. At the end of the treatment, we examined the effects of GLE on plasma glucose, lipid levels, and the expression of genes related to lipogenesis, lipolysis, and gluconeogenesis. Both GLE groups lowered levels of plasma glucose, insulin, triglycerides, total cholesterol, and non-esterified fatty acids when compared to those in HFD group. Histological analysis revealed significantly fewer lipid droplets in the livers of GLE-treated mice compared with HFD mice. To elucidate the mechanism, Western blots and RT-PCR were performed using liver tissue. Compared with HFD mice, GLE-treated mice showed higher levels of phosphorylation of AMP-activated protein kinase (AMPK) and its substrate, acetyl-CoA carboxylase, but no differences in the expression of lipogenic genes such as sterol regulatory element-binding protein 1a, fatty acid synthase, sterol-CoA desaturase 1 and glycerol-3-phosphate acyltransferase. However, the expression levels of lipolysis and fatty acid uptake genes such as peroxisome proliferator-activated receptor-$\alpha$ and CD36 were increased. In addition, phosphoenolpyruvate carboxykinase gene expression was decreased. These results suggest that GLE ameliorates hyperglycemia and hyperlipidemia by inhibiting gluconeogenesis and stimulating lipolysis, respectively, via AMPK activation.
Kim, Jung-In;Baek, Hee-Jin;Han, Do-Won;Yun, Jeong-A
Nutrition Research and Practice
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v.13
no.1
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pp.11-16
/
2019
BACKGROUND/OBJECTIVES: Fasting and postprandial hyperglycemia should be controlled to avoid complications of diabetes mellitus. This study investigated the effects of autumn olive (Elaeagnus umbellata Thunb.) berry (AOB) on fasting and postprandial hyperglycemia in mice. MATERIALS/METHODS: In vitro ${\alpha}$-glucosidase inhibitory effect of AOB was determined. Maltose solution (2 g/kg) with and without AOB extract at 500 mg/kg or acarbose at 50 mg/kg was orally administered to normal mice after overnight fasting and glucose levels were measured. To study the effects of chronic consumption of AOB, db/db mice received the basal diet or a diet containing AOB extract at 0.4% or 0.8%, or acarbose at 0.04% for 7 weeks. Blood glycated hemoglobin and serum glucose and insulin levels were measured. Expression of adiponectin protein in epididymal white adipose tissue was determined by Western blotting. RESULTS: In vitro inhibitory effect of AOB extract on ${\alpha}$-glucosidase was 92% as strong as that of acarbose. The AOB extract (500 mg/kg) or acarbose (50 mg/kg) significantly suppressed the postprandial rise of blood glucose after maltose challenge and the area under the glycemic response curve in normal mice. The AOB extract at 0.4% or 0.8% of diet or acarbose at 0.04% of diet significantly lowered levels of serum glucose and blood glycated hemoglobin and homeostasis model assessment for insulin resistance values in db/db mice. The expression of adiponectin protein in adipose tissue was significantly elevated by the consumption of AOB at 0.8% of diet. CONCLUSIONS: Autumn olive (E. umbellata Thunb.) berry may reduce postprandial hyperglycemia by inhibiting ${\alpha}$-glucosidase in normal mice. Chronic consumption of AOB may alleviate fasting hyperglycemia in db/db mice partly by inhibiting ${\alpha}$-glucosidase and upregulating adiponectin expression.
Objectives: This study was performed to investigate the effect of TJGB on the liver of high-fat diet (HFD)-fed mice and the cell viability of HepG2 cells. Methods: After a week adaptation, 8-week-old C57BL/6N mice were fed with a 45% HFD or normal diet for 3 weeks. For the next 9 weeks, the mice were divided into 6 groups: normal diet group; HFD group; HFD plus orlistat group; HFD plus Ephedra sinica Stapf (ES) group; HFD plus low dose of TJGB group; HFD plus high dose of TJGB group. To estimate the effect of TJGB in the liver of HFD-fed mice, the protein expressions of phospho-acetyl-CoA carboxylase (p-ACC) and liver X Receptor (LXR) were determined by Western blot assay. The cell viability of ES and TJG was also evaluated in HepG2 cells. Results: The administration of TJGB had little effect on the protein expressions of p-ACC and LXR in the liver of HFD-fed mice. And the cytotoxicity was showed above 7.8 ㎍/mL in HepG2 cells. Conclusion: Further research is needed to evaluate the mechanism of TJGB on hepatic steatosis and cytotoxicity in HepG2 cells.
Background: The study investigated the influence of culturally-based health beliefs on engagement in healthy lifestyle behaviour. Specifically, the study compared levels of engagement between Western and Chinese youth in Australia and assessed the extent to which culture-specific attributions about the causes of illness, and health beliefs, predict engagement in healthy lifestyle behaviour. Materials and Methods: Ninety-four Western and 95 Chinese (N=189; Mean Age=20.8 years, SD=3 years) young adults completed an online questionnaire. Predictor variables were cultural health beliefs measured by the Chinese Cultural Views on Health and Illness scale (CCVH, Liang et al., 2008), and illness attributions beliefs measured by the Cause of Illness Questionnaire (CIQ, Armstrong and Swartzman, 1999). Outcomes variables were levels of engagement in healthy lifestyle behaviour. Results: Results indicated that Chinese participants have a significantly lower exercising rate and healthy dietary habits compared to the Western sample. Moreover, Chinese participants were found to believe more strongly than Westerners that cancer was associated with factors measured by the Traditional-Chinese-Model (TCM). Finally, the observed relationship between cultural health beliefs and physical inactivity was mediated by attributions of illness, in particular to the supernatural subscale, with the Sobel Test showing a significant mediation (z=-2.63, p=0.004). Conclusions: Mainstream approaches to encourage healthy lifestyles are unlikely to be effective when educating Chinese youth. Instead, health promotion programs should attempt to address the illness attribution beliefs and educate Chinese youth about the role of diet and exercise in prevention of diseases such as cancer.
The traditional Korean diet, which is high in rice and vegetables, is fast being replaced by a Western style diet as the standard of living goes up. In addition to this, cigarette smoking has taken on serious proportions, especially amongst those of the younger generation. Because Seoul (and it's surrounding areas) is the hub of Education and Business, it is densely populated and heavily polluted Consequently health-related issues and diseases are starting to resemble those prevalent in Western communities. Historically, stomach cancer was the #1 killer-disease in Korea, but nowadays lung cancer ranks either 1st or 2nd on the list of killer-disease in Korea. This is presumably due to the lethal combination of heavy smoking and pervasive air pollution. Despite these disquieting facts, almost no study had been made of the nutritional patterns and dietary habits of smoking and non-smoking young adults in the Seoul area. Therefore the purpose of this study is to compare the dietary and nutritional patterns of young smokers with those of young non-smokers in and around Seoul. This is done with regards to their eating habits and lifestyles, as well as the dietary components that contribute towards maintaining good health. The results showed that compared to non-smokers, smokers manifested irregular eating patterns and also tended to overindulge on fast- or junk foods. In contrast to this, non-smokers enjoyed a healthier diet, which was high in brown rice, grains, legumes, fresh fruit and vegetables, and 'kimchi'. Amongst the male subjects of this study, it was found that smokers consumed significantly less vitamin $B_2$, calcium, and phosphorous than non-smokers. It was also established that in general, stress-generated smoking habits were formed during the high school years of the younger generation. In conclusion: Because smokers maintain a less healthy diet and life-style, it is to recommended that a 'Health Education Program' be developed which could guide young smokers into adopting better dietary habits and life styles.
Kim Jae-Woo;Son Soo-Gon;Sa Eun-Ho;Kim Cherl-Ho;Park Won-Hwan
Journal of Physiology & Pathology in Korean Medicine
/
v.20
no.1
/
pp.174-180
/
2006
We examine the effect of Geiji-Bokryung-Hwan(GBH) on erectile function in a rat model of hypercholesterolemic erectile dysfunction. GBH, a drug preparation consisting of five herbs of Cinnamomi Ramulus (Geiji), Poria Cocos (Bokryun), Mountan Cortex Radicis (Mokdanpi), Paeoniae Radix (Jakyak), and Persicae Semen (Doin) is a traditional Korean herbal medicine that is widely used in the treatment of atherosclerosis-related disorders. In this study, 3-month-old Sprague-Dawley rats were used. The 6 rats control animals were fed a normal diet and the other 18 rats were fed 1% cholesterol diet for 3 months. After 1 months, GBH was added to the drinking water of the treatment group of 12 rats but not the cholesterol only group of 6 rats. Of the 12 rats 6 received 30 mg/kg per day (group 1) and 6 received 60 mg/kg per day (group 2) of GBH. At 3 months erectile function was evaluated with cavernous nerve electrostimulation in all animals. Penile tissues were collected for electron microscopy, and to perform Western blot for endothelial nitric oxide synthase (eNOS), neuronal nitric oxide synthase (nNOS), basic fibroblast growth factor (bFGF) and caveolin-1. Systemic arterial pressure was not significantly different between the animals that were fed the 1% cholesterol diet and the controls. Conversely erectile function was not impaired in the herbal medicine treated rats. Electron microscopy showed many caveolae with fingerlike processes in the cavernous smooth muscle and endothelial cell membranes in control and treated rats but not in the cholesterol only group of rats. Western blot showed differences among groups in protein expression for eNOS, nNOS, caveolin-1 and bFGF protein expression in penile tissue. Increased eNOS and nNOS protein expressions dy high cholesterol diet were significantly decreased in group 1 and group 2. Interestingly, caveolin-1 and bFGF protein expression was significantly higher in groups 1 and 2 than in the cholesterol only and control groups.
Undaria pinnatifada has been used as a natural diet food with few calories and as a source of iodine. Even though U. pinnatifida has been regarded as a diet food, the mechanisms of its inhibitory effects on adipocyte differentiation and the accumulation of fat in adipocytes are poorly understood. In this study, the effect and mechanism of U. pinnatifida ethanol extract on 3T3-L1 differentiation into adipocytes were investigated. The effects of U. pinnatifida ethanol extract on cell viability and the anti-adipogenic effect were investigated via MTT assay, Oil red O staining, RT-PCR, and western blot. The U. pinnatifida ethanol extract did not show toxicity up to a concentration of 50 ${\mu}g/ml$. The addition of U. pinnatifida ethanol extract decreased triglyceride contents by 40% when 50 ${\mu}g/ml$ of U. pinnatifida ethanol extract was added during 3T3-L1 differentiation and adipocyte triglyceride formation. The transcription and expression of peroxisome proliferator-activated receptor ${\gamma}$ ($PPAR{\gamma}$), leptin, and hormone-sensitive lipase (HSL) as adipocyte-specific proteins were determined by RT-PCR and western blot. The overexpression of $PPAR{\gamma}$ could accelerate adipocyte differentiation. Also, leptin was secreted for triglyceride accumulation in the adipocytes and the increase of adipocyte cell size. Thus, $PPAR{\gamma}$ and leptin were used as indicators of obesity. $PPAR{\gamma}$ and leptin were repressed by the increased addition of U. pinnatifida ethanol extract. This indicates that U. pinnatifida was effective as an anti-obesity agent by repressing the differentiation of 3T3-L1 into adipocytes and inhibiting triglyceride formation in adipocytes.
Park, Jong-Gil;Jeong, Se-Jin;Yu, Jinha;Kim, Gyudong;Jeong, Lak Shin;Oh, Goo Taeg
BMB Reports
/
v.51
no.10
/
pp.520-525
/
2018
Cardiovascular diseases arising from atherosclerosis are the leading causes of mortality and morbidity worldwide. Lipid-lowering agents have been developed in order to treat hypercholesterolemia, a major risk factor for atherosclerosis. However, the prevalence of cardiovascular diseases is increasing, indicating a need to identify novel therapeutic targets and develop new treatment agents. Adenosine receptors (ARs) are emerging as therapeutic targets in asthma, rheumatoid arthritis, cancer, ischemia, and inflammatory diseases. This study assessed whether LJ-1888, a selective antagonist for $A_3$ AR, can inhibit the development of atherosclerosis in apolipoprotein E knock-out ($ApoE^{-/-}$) mice who are fed a western diet. Plaque formation was significantly lower in $ApoE^{-/-}$ mice administered LJ-1888 than in mice not administered LJ-1888, without any associated liver damage. LJ-1888 treatment of $ApoE^{-/-}$ mice prevented western diet-induced hypercholesterolemia by markedly reducing low-density lipoprotein cholesterol levels and significantly increasing high-density lipoprotein cholesterol concentrations. Reduced hypercholesterolemia in $ApoE^{-/-}$ mice administered LJ-1888 was associated with the enhanced expression of genes involved in bile acid biosynthesis. These findings indicate that LJ-1888, a selective antagonist for $A_3$ AR, may be a novel candidate for the treatment of atherosclerosis and hypercholesterolemia.
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