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Dietary supplementation with a high dose of daidzein enhances the antioxidant capacity in swine muscle but experts pro-oxidant function in liver and fat tissues

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Journal of Animal Science and Biotechnology 2016年第3期7卷 412-422页

作者： Wei Chen Xianyong Ma Yingcai Lin Yunxia Xiong chuntian zheng Youjun Hu Deqian Yu Zongyong Jiang Institute of Animal Science Guangdong Academy of Agricultural SciencesGuangzhou 510640People's Republic of China The Key Laboratory ofAnimal Nutrition and Feed Science(South China)of Ministry of Agriculture GuangzhouPeople's Republic of China State Key Laboratory of Livestockand Poultry Breeding GuangzhouPeople's Republic of China Guangdong Public Laboratory of Animal Breeding and Nutrition GuangzhouPeople's Republic of China Guangdong Key Laboratory of Animal Breeding and Nutrition GuangzhouPeople's Republic of China

Background： Although isoflavones are natural dietary antioxidants, they may have toxicological effects. This study aimed to evaluate the redox system in tissues of finishing pigs by supplementation with high dose of daidzein（640 mg/kg）.Results： The supplementation of high dose of daidzein for 64 d increased the activity of superoxide dismutase and total antioxidant capacity in longissimus muscle but down-regulated the expression of reactive oxygen species（ROS）-producing enzyme NADPH oxidase-2 and cyclooxygenase-2. In contrast, high-level supplementation with daidzein exerted pro-oxidant changes in back fat, abdominal fat, liver, and plasma, as reflected by increased contents of malondialdehyde, a lipid peroxidation product, in these tissues. Furthermore, daidzein supplementation resulted in higher expression of ROS-producing enzymes, including NADPH oxidase-1 and cyclooxygenase-1in liver, 5-lipoxygenase（5-LOX） in backfat and NADPH oxidase-2 both in abdominal fat and backfat. The supplementation of daidzein did not affect meat quality parameters in longissimus muscle, including marbling score,eye muscle areas, intramuscular fat, shear force, drip loss, p H and meat ***： This experiment suggests that dietary supplementation of finishing pigs with daidzein at a high dose level improves redox status in muscle but exerts pro-oxidant effect in liver and fat tissues.

关键词： Anti-/pro-oxidant enzyme Daidzein Fat Liver Muscle Pigs

Fecal scores and microbial metabolites in weaned piglets fed different protein sources and levels

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Animal Nutrition 2018年第1期4卷 31-36页

作者： Xiaolu Wen Li Wang chuntian zheng Xuefen Yang Xianyong Ma Yunpeng Wu Zhuang Chen Zongyong Jiang Key Laboratory of Animal Nutrition and Feed Science in South China Ministry of AgricultureState Key Laboratory of Livestock and Poultry BreedingGuangdong Public Laboratory of Animal Breeding and NutritionGuangdong Key Laboratory of Animal Breeding and NutritionInstitute of Animal ScienceGuangdong Academy of Agricultural Sciences Agro-Biological Gene Research Center Guangdong Academy of Agricultural Sciences

This experiment studied the effects of dietary protein sources and levels on the gut health of piglets,p H value,and concentrations of microbial metabolites(ammonia-N,volatile fatty acids [VFA],and polyamines) in the distal colonic and proximal colonic digesta of piglets weaned at 21 d of age.A total of 150 early-weaned piglets were allotted randomly to 5 diets: 1) control diet(CT; 17% CP),2) CT formulated with more soy protein concentrate(SPC19; 19% CP),3) more fish meal(FM19; 19% CP),4) CT formulated with more soy protein concentrate(SPC23; 23% CP),and 5) more fish meal(FM23; 23%CP).Results showed high protein level increased fecal score(P 0.05).The p H value and ammonia-N concentration of digesta in the proximal and distal colon of FM23 were significantly higher(P 0.05).Histamine and spermidine concentrations of FM23 were higher than those of other treatments(P < 0.05).Propionic acid and butyric acid concentrations in the distal colon were higher of FM23 than of FM19(P < 0.05); putrescine,histamine and spermidine were higher of FM23 than of LP and FM19(P < 0.05).It was concluded that high dietary CP content increased microbial metabolites(ammonia-N,histamine,putrescine) in colonic digesta and aggravated piglets' diarrhea.

关键词： Piglet Protein level Protein source Microbial metabolites Diarrhea

Effects of different forms of yeast Saccharomyces cerevisiae on growth performance,intestinal development,and systemic immunity in early-weaned piglets

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Journal of Animal Science and Biotechnology 2016年第1期7卷 78-85页

作者： Zongyong Jiang Shaoyong Wei Zhilin Wang Cui Zhu Shenglan Hu chuntian zheng Zhuang Chen Youjun Hu Li Wang Xianyong Ma Xuefen Yang Key Laboratory of Animal Nutrition and Feed(South China) Ministry of Agriculture of ChinaState Key Laboratory of Livestock and Poultry BreedingGuangdong Public Laboratory of Animal Breeding and NutritionInstitute of Animal ScienceGuangdong Academy of Agricultural Sciences Agro-biological Gene Research Center Guangdong Academy of Agricultural Sciences

The present study was conducted to determine effects of different forms of yeast （Saccharomyces cerevisiae, strain Y200007） on the growth performance, intestinal development, and systemic immunity in early-weaned piglets. A total of 96 piglets （14-d old, initial average body weight of 4.5 kg） were assigned to 4 dietary treatments：（1） basa diet without yeast （Control）; （2） basal diet supplemented with 3.00 g/kg live yeast （LY）; （3） basal diet supplemented with 2.66 g/kg heat-killed whole yeast （HKY）; and （4） basal diet supplemented with 3.00 g/kg superfine yeast powders （SFY）. Diets and water were provided ad libitum to the piglets during 3-week experiment. Growth performance of piglets was measured weekly. Samples of blood and small intestine were collected at days 7 and 21 of experiment. Dietary supplementation with LY and SFY improved G：F of piglets at days ]-21 of the experiment （P 〈 0.05） compared to Control group. Serum concentrations of growth hormone （GH）, triiodothyronine （T3）, tetraiodothyronine （T4）, and insulin growth factor 1 （iGF-1） in piglets at day 21 of the experiment were higher when fed diets supplemented with LY and SFY than those in Control group （P 〈 0.05）. Compared to Control group, contents of serum urea nitrogen of piglets were reduced by the 3 yeast-supplemented diets （P 〈 0.05）. Diets supplemented with LY increased villus height and villus-to-crypt ratio in duodenum and jejunum of piglets （P 〈 0.05） compared to other two groups at day 7 of the experiment. Feeding diets supplemented with LY and SFY increased （P 〈 0.05） serum concentrations of IgA, IL-2, and IL-6 levels in piglets compared to Control. The CD4＋/CD8＋ ratio and proliferation of T-lymphocytes in piglets fed diets supplemented with LY were increased compared to that of Control group at day 7 of the experiment （P 〈 0.05）. In conclusion, dietary supplementation with both LY and SFY enhanced feed conversion, small intestinal development, and systemic immunity in early-weaned piglets

关键词： Growth performance Immunity Intestinal development Piglets Saccharomyces cerevisiae Yeast

Effects of protein sources and levels in antibiotic-free diets on diarrhea,intestinal morphology, and expression of tight junctions in weaned piglets

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Animal Nutrition 2015年第3期1卷 170-176页

作者： Yunpeng Wu Zongyong Jiang chuntian zheng Li Wang Cui Zhu Xuefen Yang Xiaolu Wen Xianyong Ma Key Laboratory of Animal Nutrition and Feed Science in South China Ministry of Agriculture State Key Laboratory of Livestock and Poultry BreedingGuangdong Public Laboratory of Animal Breeding and Nutrition Institute of Animal Science Guangdong Academy of Agricultural Sciences College of Animal Science South China Agricultural University Agro-biological Gene Research Center Guangdong Academy of Agricultural Sciences

This study examined effects of dietary protein sources and levels on intestinal health of 21 to 35 d-old weaned piglets fed antibiotics-free diets. A total of 150 weaned piglets(21 d of age) were allotted to 5 dietary treatment groups. Diets were formulated, based on corn-soybean meal, with different protein sources(fish meal and soy protein concentrate) to provide different dietary CP levels. Piglets within 5 dietary treatments were fed diets as follows, respectively: 1) control diet of 17% CP(control); 2) 19% CP diets formulated with more soy protein concentrate(SPC19); 3) fish meal(FM19); 4) 23.7% CP diets formulated with more soy protein concentrate(SPC23); 5) fish meal(FM23). The results showed that piglets from control group had higher ADG and lower incidence of diarrhea compared with those of other groups(P < 0.05). The incidence of diarrhea of piglets in FM19 group was lower than those from SPC23 group and FM23 group(P < 0.05). With the higher CP levels, villous height and villous height to crypt depth ratio of piglets in the duodenum and jejunum were decreased(P < 0.05), but crypt depth was increased(P < 0.05). Comparing control group and other groups, we found the expression of inflammatory cytokines interleukin-1β(IL-1β) and interferon-γ(IFN-γ) were increased(P < 0.05) in the jejunum and colon of piglets, as did cystic fibrosis transmembrane conductance regulators(CFTR) in the distal colon. The relative transcript abundance of Zonula occludens-1(ZO-1) in the jejunum, and occludin in the jejunum and ileum of piglets fed 23.7% CP diets were reduced compared with those fed control diet(P < 0.05). In conclusion, the 17% CP diet without in-feed antibiotics helped improve growth performance and relief of diarrhea of 21 to 35 d-old weaned piglets. Dietary CP level, rather than its source(either fish meal or soy protein concentrate), has more significant impacts on the growth performance and intestinal health of 21 to 35 d-old weaned piglets when fed antibiotics-

关键词： Dietary protein Weaned piglets Diarrhea Intestinal health Tight junction protein Antibiotic-free diets

Dietary supplementation with 2-hydroxy-4-methyl(thio)butanoic acid and DL-methionine improves productive performance,egg quality and redox status of commercial laying ducks

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Animal Nutrition 2023年第3期14卷 101-110页

作者： Yanan Zhang Zhiwei Zhuang Tahir Mahmood Yves Mercier Yongyan Jin Xuebing Huang Kaichao Li Shuang Wang Weiguang Xia Shenglin Wang Miao Yu Wei Chen chuntian zheng Institute of Animal Science Guangdong Academy of Agricultural SciencesKey Laboratory of Animal Nutrition and Feed Science(South China)of Ministry of AgricultureState Key Laboratory of Livestock and Poultry BreedingGuangdong Public Laboratory of Animal Breeding and NutritionGuangdong Key Laboratory of Animal Breeding and Nutrition510640GuangzhouChina Institute of Life Science and Engineering Foshan University528200FoshanChina Adisseo France S.A.S.Centre of Excellence and Research in Nutrition CommentryFrance

This experiment aimed to study the effects of supplemental methionine sources,2-hydroxy-4 methyl(thio)butanoic acid(HMTBa)and DL-Methionine(DL-Met),on productive performance,egg quality,and redox status of laying ducks.A total of 792 healthy 25-wk-old Longyan laying ducks with similar body weights were randomly allotted to 11 treatment *** treatment group had 6 replicates of 12 *** trial lasted for 16 *** were fed a basal deficient diet(Met:0.24%;Met+Cys:0.51%)or supplemented with DL-Met or HMTBa at 0.05%,0.12%,0.19%,0.26%,and 0.33%of diet,*** with the basal diet,supplementation with either DL-Met or HMTBa increased the average egg weight,egg mass,and decreased feed to egg ratio during the whole trial period(P<0.05).Albumen weight and its ratio to total egg weight were increased,but yolk and shell ratio,albumen height,Haugh unit and shell breaking strength were decreased(P<0.05).Dietary DL-Met or HMTBa supplementation increased taurine,methionine,leucine,tryptophan and arginine content,and decreased serine and lysine content in plasma(P<0.05).The redox status of laying ducks was improved by enhancing the glutathione peroxidase and catalase activities,glutathione content and its ratio relative to glutathione(oxidized)content and decreasing malondialdehyde content and increasing mRNA expression of superoxide dismutase-1,glutathione peroxidase-1,hemeoxygenase-1 and nuclear factor-like 2 in liver and ileum with the supplementation of DL-Met or HMTBa(P<0.05).Liver health status measured by average area proportion lipid droplet was improved with supplementation of DL-Met or HMTBa(P<0.05).Villus height and villus height to crypt depth ratio in the ileum and the ileal gene expression of tight junction protein and occludin were increased with DL-Met or HMTBa supplementation(P<0.05).Taken together,these results suggested that the efficacy of dietary supplementation of HMTBa was similar to DL-Met,and it ranged from 98%to 100%for productive

关键词： DL-Methionine 2-Hydroxy-4 methyl(thio)butanoic acid Productive performance Efficacy Laying duck

Effects of dietary barley inclusion and glucanase supplementation on the production performance,egg quality and digestive functions in laying ducks

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Animal Nutrition 2021年第1期7卷 176-184页

作者： Wei Chen Shuang Wang Runsheng Xu Weiguang Xia Dong Ruan Yanan Zhang Khaled A.F.Mohammed Mahmoud M.M.Azzam Ahmed M.Fouad Kaichao Li Xuebing Huang Shenglin Wang chuntian zheng Institute of Animal Science Guangdong Academy of Agricultural SciencesState Key Laboratory of Livestock and Poultry BreedingKey Laboratory of Animal Nutrition and Feed Science in South ChinaMinistry of Agriculture and Rural AffairsGuangdong Public Laboratory of Animal Breeding and NutritionGuangdong Key Laboratory of Animal Breeding and NutritionGuangzhou 510640China College of Life Science and Engineering Foshan UniversityFoshan 528225China Department of Poultry Production Faculty of AgricultureAssiut UniversityAssiut 71526Egypt Poultry Production Department Faculty of AgricultureMansoura UniversityMansoura 35516Egypt Animal Production Department College of Food and Agriculture SciencesKing Saud UniversityRiyadh 11451Saudi Arabia Department of Animal Production Faculty of AgricultureCairo UniversityGiza 12613Egypt

This study evaluated the effects of barley inclusion and glucanase supplementation on the productive performance and digestive function in laying *** experiment used a randomized design with a 5×2 factorial arrangement of 5 graded levels of barley(0%,15%,30%,45%and 60%)with or without 1.5 g/kgβ-1,3-1,4-glucanase(15,000 U/kg).During the experimental period of 120 d,the weight and total number of eggs within each pen were recorded daily,and egg quality was determined every 4 *** the end of the experiment,3 randomly selected ducks within each replicate were sacrificed,then duodenal digesta and jejunal mucosa was *** inclusion of barley had no effects on egg production,daily egg mass or FCR,but supplementation with glucanase improved egg production and FCR(P<0.01).Barley did not affect feed intake of laying ducks,but glucanase tended to increase feed intake(P=0.09).Neither barley norβ-glucanase had effects on the egg quality variables,except for yolk color score,which was decreased with increasing barley ***,but not barley,increased the activity of chymotrypsin and amylase in duodenal *** inclusion affected the activity of alkaline phosphatase and maltase in jejunal mucosa(P<0.05),butβ-glucanase had no effects on the activity of these brush border *** inclusion increased the glucan content in duodenal digesta,but supplementation of glucanase to barley-based diet reduced digesta glucan content and reduced total volatile fatty acids and increased the proportion of acetic acid in cecal *** results indicate that,without glucanase,the optimal dietary barley level in the diets of laying ducks is about 13%for maximal production performance;glucanase supplementation of the barley diets improved production perfor-mance,probably through enhancing digestive function.

关键词： Barley Laying duck Glucanase Digestive function

石蜡Pickering乳液及其微胶囊相变非织造材料的制备与性能

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纺织学报 2024年第7期45卷 130-139页

作者：柯文涛陈明郑淳天石小丽朱新生苏州大学纺织与服装工程学院江苏苏州215021 苏州大学材料与化学化工学部江苏苏州215223

Pickering乳液固含量和储存稳定性等性能显著优于传统乳液,但是,其乳化剂品种仍然稀缺,以苯乙烯(St)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)为主要单体,二乙烯基苯(DVB)为交联剂,乙醇为助溶剂,用无皂乳液聚合法制备了阳离子型共聚物颗粒(P... 详细信息

Pickering乳液固含量和储存稳定性等性能显著优于传统乳液,但是,其乳化剂品种仍然稀缺,以苯乙烯(St)、甲基丙烯酰氧乙基三甲基氯化铵(DMC)为主要单体,二乙烯基苯(DVB)为交联剂,乙醇为助溶剂,用无皂乳液聚合法制备了阳离子型共聚物颗粒(P(St-co-DMC)),并将其作为乳化剂制备了石蜡Pickering乳液;并将石蜡乳液浸渍粘胶水刺非织造布制备石蜡微胶囊相变材料(Vis-PCM)。借助红外光谱仪、扫描电子显微镜、热重/差热联用仪、差示扫描量热仪和接触角测量仪等对共聚物及相变材料微观结构与性能进行表征与测试。实验结果表明:随着DMC用量、引发剂用量和乙醇含量的增加,单体转化率先增大后减小,P(St-co-DMC)粒径和分散指数先减小后增大,其Zeta电位则先快速增大而后趋于恒定,而亲水性持续增强;所得石蜡Pickering乳液的油水体积比高达3∶1,储存稳定性超过3个月;Vis-PCM的相变潜热高达139.3 J/g,经过20次冷热循环处理后,Vis-PCM中的石蜡泄漏率仅0.6%。本文制备的Vis-PCM具有良好的储热与放热性能,在相变储能领域具有广阔的应用前景。

关键词：甲基丙烯酰氧乙基三甲基氯化铵无皂乳液聚合石蜡 Pickering乳液粘胶非织造布相变材料

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蛋壳形成的钙代谢机制及其影响因素

动物营养学报 2021年第3期33卷 1201-1207页

作者：张亚男王爽阮栋郑春田广东省农业科学院动物科学研究所畜禽育种国家重点实验室农业农村部华南动物营养与饲料重点实验室广东省动物育种与营养公共实验室广东省畜禽育种与营养研究重点实验室广州510640

蛋壳的形成是动态时序性过程,在子宫(蛋壳腺)内完成,经过钙化起始、线性沉积和钙化末期3个阶段完成蛋壳的钙化,期间需要持续的提供大量的钙离子。子宫内的钙离子一部分来源于肠道吸收,另一部分来源于髓骨的动员。因此,钙离子代谢是影响... 详细信息

蛋壳的形成是动态时序性过程,在子宫(蛋壳腺)内完成,经过钙化起始、线性沉积和钙化末期3个阶段完成蛋壳的钙化,期间需要持续的提供大量的钙离子。子宫内的钙离子一部分来源于肠道吸收,另一部分来源于髓骨的动员。因此,钙离子代谢是影响蛋壳钙化的重要因素,受多种因素调节。本文从钙离子在肠道的吸收转运、髓骨的动员、子宫的分泌,综述了蛋壳形成的钙代谢机制,并简述其影响因素,以期为蛋壳品质的调控研究提供思路。

关键词：蛋壳钙代谢影响因素

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基质蛋白对蛋壳品质的调控

动物营养学报 2019年第1期31卷 24-31页

作者：张亚男陈伟阮栋郑春田广东省农业科学院动物科学研究所畜禽育种国家重点实验室农业部华南动物营养与饲料重点实验室广东省动物育种与营养公共实验室广东省畜禽育种与营养研究重点实验室广州510640

基质蛋白是蛋壳有机基质中的重要组分,其分泌贯穿蛋壳形成的全过程,参与蛋壳结构的形成,进而影响蛋壳品质。本文从基质蛋白的种类和特点、在蛋壳中的分布和对蛋壳结构的作用,以及蛋壳中基质蛋白的调控等方面,简述基质蛋白影响蛋壳品质... 详细信息

基质蛋白是蛋壳有机基质中的重要组分,其分泌贯穿蛋壳形成的全过程,参与蛋壳结构的形成,进而影响蛋壳品质。本文从基质蛋白的种类和特点、在蛋壳中的分布和对蛋壳结构的作用,以及蛋壳中基质蛋白的调控等方面,简述基质蛋白影响蛋壳品质的研究进展,以期为营养调控蛋壳品质的研究提供思路。

关键词：基质蛋白蛋壳结构蛋壳品质