This study was carried out to analyse the nutrient composition of grape seeds and to assess as a plant oil source. Mean values of nutrient contents were as follows: moisture 10.1%, crude protein 11.7%, crude fat 29.7%, crude ash 2.53%, total sugar 4.38 ${\mu}g/mg$, and reducing sugar 3.96 ${\mu}g/mg$. Linoleic acid was the most prominent fatty acid, showing 66.15%, and followed by oleic acid > palmitic acid > stearic acid. Mean contents of neutral-, glyco-and phospholipids were 85.4%, 6.50%, and 8.06%, respectively. Mean saponification value of crude fat was 187.5, showing elevated value than that of perilla oil. Antioxidative capacity of grape seed oil was marked by 12 and 50% higher values than those of perilla or sesame oils. Regardless of storage conditions, grape seed oil showed more lowered P.O.V than perilla and sesame oils. P.O.V of grape seed oil treated at $150^{\circ}C$ showed a lower value than those of perilla and sesame oils. The stability against oxidation may be related with the antioxidant substances contained in the grape seeds.
Background: Following the ban on the importation of import-dependent fed ingredients in most developing countries, the need to look inward for local content is now compelling. Thus, leaf meals that have phytogenic additive potentials are envisaged will be a viable feed ingredient in rabbit diets. Methods: The effect of dietary inclusion of gliricidia leaf meal (GLM) with or without multi-enzyme (E) supplementation in rabbits was investigated using ninety-six 35-day old rabbits of crossbreed (Newzealand and Chinchilla). One basal diet that met the requirements of growing rabbit was formulated (Diet 1). Thereafter, another two diets were formulated to contain 15% GLM and 15% GLM plus multi-enzyme at 1 g/kg and designated as diets 2 and 3 respectively. The rabbits were randomly distributed into the 3 diets (32 rabbits/treatment; 4 rabbits/replicate) and fed their respective experimental diets for 8 weeks. Results: The body weight and daily weight gain of the rabbits fed on GLM free diet and those on GLM-based diets (diets 1 and 2) were similar at finishing period of 63-91 day but have lower (P < 0.01) values than those rabbits fed GLM + E based diet (diet 3) at finishing period (63-91 days) and whole fattening period (35-91 days). The apparent dry matter and crude protein digestibility of rabbits fed control diet and those fed 15% GLM based diet were lower (P < 0.05) than those fed 15% GLM + E-based diet. Triglycerides concentration of rabbits fed 15% GLM-based diet without enzyme addition were lower (P < 0.05) than those observed for rabbits on the rest test diets. Cholesterol and Low-Density Lipoprotein levels of rabbits fed 15% GLM and 15% GLM + E-based diets were lower (P < 0.05) than those fed the GLM free diet. The superoxide dismutase and glutathione peroxidase of rabbits fed the GLM free diet (diet 1) were significantly (P < 0.05) lower than those fed the 15%GLM and 15% GLM + E-based diets. Conclusion: Dietary inclusion of GLM at 15% of the diet did not have a negative effect on the rabbits postweaning period (35-63 days) but will require multi-enzyme supplementation to enhance growth indices at finishing period (63-91 day) without precipitating negative effect on the rabbits' health status.
The potential utility of fish scales to the functional food industry has been investigated due to its antioxidant and antihypertensive characteristics. In this study, we report on the reactive oxygen species (ROS) scavenging and angiotensin I converting enzyme (ACE) inhibitory activities of gelatin hydrolysates processed from Branchiostegus japonicus scales, which are also high in protein content (about 46.1%). We prepared the enzymatic gelatin hydrolysates with four proteases (${\alpha}$-chymotrypsin, Alcalase, Neutrase and trypsin) from B. japonicus scale gelatin, which was prepared according to different reaction times, substrate/enzyme ratios and substrate concentrations. The enzymatic hydrolytic degrees of the gelatin increased time-dependently up to 6 hrs, while the Alcalase gelatin hydrolysates showed the highest hydrolysis degrees compared to the others. Furthermore, gelatin hydrolysates of Neutrase and ${\alpha}$-chymotrypsin showed the highest DPPH radical and $H_2O_2$ scavenging activities ($IC_{50}$ value; 9.18 mg/mL and 9.74 mg/mL), respectively. However, the activities were not significant (P<0.05). We also observed that the four gelatin hydrolysates significantly increased ACE inhibitory activities from approximately 20% to 60% (P<0.05), Among them, the Alcalase gelatin hydrolysates showed the higher ACE inhibitory activity ($IC_{50}$ value; 0.73 mg/mL) compared to the others. These results suggest that the enzymatic gelatin hydrolysates prepared from B. japonicus scales may possess a potentially useful function as an ACE inhibitory agent. As such, the utility of B. japonicus scales should be given due consideration for application in the functional food industry.
The increased oxidative stress may play an important role on the pathogenesis of diabetes and diabetic complications, and the blood level of vitamin C and lipid peroxidation in NIDDM patients may be used as an indicator for oxidative stress. However there is only scanty evidence on the blood level of vitamin C in NIDDM patients with or without diabetic complications. The study population consisted of 90 NIDDM patients(diabetes without complication, 48, and diabetes with complications, 42) and 41 normal subjects. The 42 diabetic complications were divided into 3 groups : 15 diabetic nephropathy, 18 diabetic neuropathy, 9 diabetic retinopathy. The anthropometric data and blood biochemical data were studied. The dietary intake was determined by 24 hour recall methods and food frequency questionnaire. The plasma concentrations of MDA and vitamin C were determined by fluorophotometer and HPLC respectively. 1) In blood lipoprotein study, diabetes with complication had higher level of TG than diabetes without complications, while no significant differences in total cholesterol, HDL, and LDL were shown. Diabetic neuropathy had the highest TG level among diabetic complication groups. 2) The intakes of vitamin B complexes(vitamin B$_2$, vitamin B$_{6}$, not vitamin B$_1$) and antioxidant vitamins(vitamin A and vitamin E, not vitamin C) and certain minerals such as iron and calcium in diabetes were not sufficient but the intakes of energy, protein, niacin, and phosphorus in diabetes were sufficient. The dietary intakes between diabetes with-and without complications were not significantly different. Among diabetic complications, the diabetic retinopathy had the lowest intake of vitamin B$_2$ and B$_{6}$(p < 0.05). the diabetic neuropathy or nephropathy consumed extremely low amount of vitamin A. 3) The MDA concentrations of NIDDM was significantly higher than that in controls(p < 0. 05) while no significant difference in the MDA concentration between with and without complications was shown. Although there were no statistical differences, the diabetic nephropathy and diabetic neuropathy showed the higher concentration of MDA than the diabetes without complications or diabetic retinopathy. 4) The plasma concentration of vitamin C in controls was higher than that in diabetes(p < 0.05) while the plasma vitamin C in diabetes with and without complications were similar. In diabetic complications, no differences in plasma vitamin C concentration of three groups were shown. This study showed that the oxidative stress in NIDDM patients was highly increased and the vitamin C reserve was significantly depleted, as compared with normals, although their intakes of vitamin C met korean RDA, which means that diabetes need more vitamin C intake to decrease oxidative stress in NIDDM patients.nts.
Park, B.Y.;Kim, J.H.;Cho, S.H.;Hwang, I.H.;Jung, O.S.;Kim, Y.K.;Lee, J.M.;Yun, S.G.
Asian-Australasian Journal of Animal Sciences
/
v.18
no.3
/
pp.414-419
/
2005
The current study was conducted to investigate the effects of dietary chitosan-alginate-Fe(II) complex (CAFC) supplementation on carcass and meat qualities of pig m. longissimus during chiller ageing. One hundred and twenty-two LYD (Landrace${\times}$Yorkshire${\times}$Duroc) pigs were sampled from an industrial population. Seventy-four pigs (32 gilts and 42 barrows) were administered 3 ml of dietary supplementation of CAFC per day from 25 to 70 days of age, while the remaining 48 pigs (20 gilts and 28 barrows) were fed the same commercial feeding regime without the supplementation. For assessing the dietary effects on pH, objective meat color, cooking loss, water-holding capacity (WHC), thiobarbituric acid reactive substances (TBARS), volatile basic nitrogen (VBN) and fatty acid composition during ageing, 20 barrows (10 of each treatment) were randomly sampled, and aged for 3, 7, 12, 16, 20 and 25 days in a $1^{\circ}C$ chiller. The results showed that CAFC-fed pigs required approximately 10 fewer feeding days than the control group. Furthermore, the treatment resulted in greatly higher carcass grade whereby the grade A was increased by approximately 35% and 7% for gilts and barrows, respectively. The treatment had no significant effect (p>0.05) on pH, meat color and WHC during ageing. On the other hand, the CAFC-fed pigs showed significantly (p<0.05) lower TBARS values from 20 days of storage. In addition, the sum of unsaturated fatty acids for the treated group was significantly (p<0.05) higher than that for the control group after the storage time. This implied that CAFC supplementation could reduce the formation of free radicals in fatty acids (i.e., lipid oxidation). The treatment also significantly (p<0.05) retarded VBN formation during ageing, indicating a significant reduction in protein degradation. However, as there was no difference in pH between the two groups, the result raised a possibility that antibacterial activity of the CAFC alone could cause reduction in the formation of TBARS and VBN. In this regard, although the treatment effectively slowed down the formation of TBARS and TBA during chiller ageing, it was not resolved whether that was associated with the direct effect of the antioxidant function of chitosan and/or alginate, or a consequence of their antibacterial functions.
Yousef, Amany I;El-Masry, Omar S;Abdel Mohsen, Mohamed A
Asian Pacific Journal of Cancer Prevention
/
v.17
no.2
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pp.743-748
/
2016
Background: $K^-Ras$ activation is an early event in colorectal carcinogenesis and associated mutations have been reported in about 40% of colorectal cancer patients. These mutations have always been responsible for enhancing malignancy and silencing them is associated with attenuation of tumorigenicity. Among downstream effectors are the RAF/MEK/ERK and the PI3K/Akt signaling pathways. PI3K/Akt signaling leads to reduction of apoptosis, stimulated cell growth and enhanced proliferation. Ellagic acid (EA), a naturally occurring antioxidant, has recently emerged as a promising anti-cancer agent. Purpose: To evaluate the impact of cellular genetic makeup of two colon cancer cell lines with different genetic backgrounds, HCT-116 ($K^-Ras^-/p53^+$) and Caco-2 ($K^-Ras^+/p53^-$), on response to potential anti-tumour effects of EA. In addition, the influence of $K^-Ras$ silencing in HCT-116 cells was investigated. Materials and Methods: Cellular proliferation, morphology and cell cycle analysis were carried out in addition to Western blotting for detecting total Akt and p-Akt (at Thr308 and Ser473) in the presence and absence of different concentrations of EA. Cell proliferation was also assessed in cells transfected with different concentrations of $K^-Ras$ siRNA or incubated with ellagic acid following transfection. Results: The results of the present study revealed that EA exerts anti-proliferative and dose-dependent pro-apoptotic effects. Cytostatic and cytotoxic effects were also observed. p-Akt (at Thr308 and Ser473) was downregulated. Moreover, EA treatment was found to (i) reduce $K^-Ras$ protein expression; (ii) in cells transfected with siRNA and co-treated with EA, pronounced anti-proliferative effects as well as depletion of p-Akt (at Thr308) were detected. Conclusions: Cellular genetic makeup ($K^-Ras^-/p53^-$) was not likely to impose limitations on targeting EA in treatment of colon cancer. EA had a multi-disciplinary pro-apoptotic anti-proliferative approach, having inhibited Akt phosphorylation, induced cell cycle arrest and showed an anti-proliferative potential in HCT-116 cells (expressing mutant $K^-Ras$).
Although the antioxidant and cardioprotective effects of NecroX-5 on various in vitro and in vivo models have been demonstrated, the action of this compound on the mitochondrial oxidative phosphorylation system remains unclear. Here we verify the role of NecroX-5 in protecting mitochondrial oxidative phosphorylation capacity during hypoxia-reoxygenation (HR). Necrox-5 treatment ($10{\mu}M$) and non-treatment were employed on isolated rat hearts during hypoxia/reoxygenation treatment using an ex vivo Langendorff system. Proteomic analysis was performed using liquid chromatography-mass spectrometry (LC-MS) and non-labeling peptide count protein quantification. Real-time PCR, western blot, citrate synthases and mitochondrial complex activity assays were then performed to assess heart function. Treatment with NecroX-5 during hypoxia significantly preserved electron transport chain proteins involved in oxidative phosphorylation and metabolic functions. NecroX-5 also improved mitochondrial complex I, II, and V function. Additionally, markedly higher peroxisome proliferator-activated receptor-gamma coactivator-$1{\alpha}$ ($PGC1{\alpha}$) expression levels were observed in NecroX-5-treated rat hearts. These novel results provide convincing evidence for the role of NecroX-5 in protecting mitochondrial oxidative phosphorylation capacity and in preserving $PGC1{\alpha}$ during cardiac HR injuries.
Lee, Sun Young;Kim, Yoo-Sun;Lim, Ji Ye;Chang, Namsoo;Kang, Myung-Hee;Oh, Se-Young;Lee, He-Jin;Kim, Hyesook;Kim, Yuri
Nutrition Research and Practice
/
v.8
no.3
/
pp.249-256
/
2014
BACKGROUND/OBJECTIVES: The traditional Korean diet is plant-based and rich in antioxidants. Previous studies have investigated the potential health benefits of individual nutrients of Korean foods. However, the cumulative effects of a Korean diet on inflammation remain poorly understood. Therefore, the aim of this study was to investigate the anti-inflammatory effects of a plant-based Korean diet. MATERIALS/METHODS: Using data from the Fifth Korean National Health and Nutrition Examination Survey, 75 individual plant food items were selected which represent over 1% of the total diet intake of the Korean diet. These items were classified into ten different food groups, and the vegetable (Veg) and fruit (Fruit) groups were studied based on their high antioxidant capacity. For comparison, a mixture of all ten groups (Mix) was prepared. To produce a model of inflammation with which to test these Veg, Fruit, and Mix plant-based Korean food extracts (PKE), RAW264.7 macrophages were treated with lipopolysaccharide (LPS). RESULTS: Levels of nitric oxide (NO) and prostaglandin $E_2$ ($PGE_2$), as well as protein expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) were found to be lower following PKE treatment. Furthermore, PKE treatment was found to suppress tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$) and interleukin-6 (IL-6) via the nuclear transcription factor kappa-B ($NF-{\kappa}B$) signaling pathway. Overall, the Mix group exhibited the greatest anti-inflammatory effects compared with Veg and Fruit PKE group. CONCLUSIONS: Inhibition of LPS-induced pro-inflammatory mediators by the PKE tested was found to involve an inhibition of NF-kB activation. Moreover, PKE tested have the potential to ameliorate various inflammation-related diseases by limiting the excessive production of pro-inflammatory mediators.
Seol, Bo Gyeong;Kim, Ji Hyun;Woo, Minji;Song, Yeong Ok;Choi, Yung Hyun;Noh, Jeong Sook;Cho, Eun Ju
Nutrition Research and Practice
/
v.14
no.3
/
pp.175-187
/
2020
BACKGROUND/OBJECTIVES: In this study, we investigated the beneficial effects of skate cartilage extracts containing chondroitin sulfate (SCS) on hyperlipidemia-induced inflammation and oxidative stress in high cholesterol diet (HCD)-fed mice in comparison with the effects of shark cartilage-derived chondroitin sulfate (CS). MATERIALS/METHODS: Low-density lipoprotein receptor knockout (LDLR-KO) mice were fed HCD with an oral administration of CS (50 and 100 mg/kg BW/day), SCS (100 and 200 mg/kg BW/day), or water, respectively, for ten weeks. RESULTS: The administration of CS or SCS reduced the levels of serum triglyceride (TG), total cholesterol (TC), and LDL cholesterol and elevated the levels of high-density lipoprotein cholesterol, compared with those of the control group (P < 0.05). Furthermore, CS or SCS significantly attenuated inflammation by reducing the serum levels of interleukin (IL)-1β and hepatic protein expression levels of nuclear factor kappa B, inducible nitric oxide synthase, cyclooxygenase-2, and IL-1beta (P < 0.05). In particular, the serum level of tumor necrosis factor-alpha was reduced only in the 100 mg/kg BW/day of SCS-fed group, whereas the IL-6 level was reduced in the 100 and 200 mg/kg BW/day of SCS-fed groups (P < 0.05). In addition, lipid peroxidation and nitric oxide production were attenuated in the livers of the CS and SCS groups mediated by the upregulation of hepatic proteins of antioxidant enzymes, such as superoxide dismutase, catalase, and glutathione peroxidase (P < 0.05). CONCLUSIONS: These results suggest that the biological effects of SCS, similar to those of CS, are attributed to improved lipid profiles as well as suppressed inflammation and oxidative stress induced by the intake of HCD.
The physiological responses of microorganisms to specific nutrient limitation can be regulated at the transcriptional levels. In this study, in order to develop the Pichia pastoris-derived promoter inducible by nutrient-limited condition, we constructed cDNA libraries using RT-PCR of total RNA from P. pastoris in steady-states of phosphate-limited chemostat with different dilution rates. Various genes were detected from cDNA library. Among these genes, the gene encoding putative sodium/phosphate ($Na^+$/Pi) symporter (NPS), high affinity transporter of phosphate, was detected. It was observed that expression of NPS increased in a manner specific to phosphate-limited condition through Northern blot. Therefore, it is thought that the promoter from NPS gene may have the potential as auto-inducible promoter by phosphate-limited culture condition without inducer.
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