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Preparation, characterization, antimicrobial and cytotoxicity studies of copper/zincloaded montmorillonite

Journal of Animal Science and Biotechnology 2017年第3期8卷 670-676页

作者： lefei jiao Fanghui Lin Shuting Cao Chunchun Wang Huan Wu Miaoan Shu Caihong Hu Animal Science College Zhejiang UniversityKey Laboratory of Animal Feed and Nutrition of Zhejiang ProvinceHangzhou 310058People's Republic of China Key Laboratory of Animal Nutrition and Feed in East China Ministry of AgricultureHangzhou 310058People's Republic of China

Background： A series of modified montmorillonites（Mt） including zinc-loaded Mt（Zn-Mt）, copper-loaded Mt（Cu-Mt）, copper/zinc-loaded Mt with different Cu/Zn ratio（Cu/Zn-Mt-1, Cu/Zn-Mt-2, Cu/Zn-Mt-3） were prepared by an ion-exchange reaction, and characterized using X-ray diffraction（XRD）, fourier transformed infrared spectroscopy（FTIR） and transmission electron microscopy（TEM）. The specific surface areas, antimicrobial activity and cytotoxicity of the modified Mt were ***： In the modified Mt, hydrated Cu ions and Zn ions were exchanged in the interlayer space of Mt and the particles were irregular shapes. The results showed that Cu/Zn-Mt enhanced antibacterial and antifungal activity compared with Zn-Mt and Cu-Mt possibly due to the synergistic effect between Cu and Zn. Among the Cu/Zn-Mt with different Cu/Zn raitos, Cu/Zn-Mt with a Cu/Zn ratio of 0.98 or 0.51 showed higher antimicrobial activity against gram-negative bacteria（Escherichia coli）, gram-positive bacteria（Staphylococcus aureus）, fungi（Candida albicans）.Moreover, the antimicrobial activity of Cu/Zn-Mt was correlated with its specific surface area. Cytotoxicity studies on IPEC-J2 cell showed a slight cytotoxicity of Cu/***： The current data provide clear evidence that in terms of its antimicrobial activity and relatively low toxicity, the Cu/Zn-Mt holds great promise for applications in animal husbandry.

关键词： Antimicrobial reagent Modified montmorillonites Synergistic antimicrobial effect

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Dietary choline activates the Ampk/Srebp signaling pathway and decreases lipid levels in Pacific white shrimp(Litopenaeus vannamei)

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Animal Nutrition 2023年第4期15卷 58-70页

作者： Jingjing Lu Xinyue Tao Jiaxiang Luo Tingting Zhu lefei jiao Peng Sun Qicun Zhou Douglas R.Tocher Min Jin Laboratory of Fish and Shellfish Nutrition School of Marine SciencesNingbo UniversityNingbo 315211China Guangdong Provincial Key Laboratory of Marine Biotechnology Institute of Marine SciencesShantou UniversityShantou 515063China

An 8-week feeding trial was conducted in Pacific white shrimp(Litopenaeus vannamei)to evaluate the effects of dietary choline supplementation on choline transport and metabolism,hepatopancreas histological structure and fatty acid profile,and regulation of lipid *** isonitrogenous and isolipidic diets were formulated to contain different choline levels of 2.91(basal diet),3.85,4.67,6.55,10.70 and 18.90 g/kg,respectively.A total of 960 shrimp(initial weight,1.38±0.01 g)were distributed randomly into twenty-four 250-L cylindrical fiber-glass tanks,with each diet assigned randomly to 4replicate *** results indicated that dietary choline significantly promoted the deposition of choline,betaine and carnitine(P<0.05).The diameters and areas of R cells,total lipid and triglyceride contents in hepatopancreas,and triglyceride and non-esterified fatty acid contents in hemolymph were negatively correlated with dietary choline *** contents of functional fatty acids in hepatopancreas,the activity of acetyl-CoA carboxylase(Acc),and the mRNA expression of fas,srebp and acc were highest in shrimp fed the diet containing 4.67 g/kg choline,and significantly higher than those fed the diet containing 2.91 g/kg,the lowest level of choline(P<0.05).The number of R cells,content of very lowdensity lipoprotein(VLDL),activities of carnitine palmitoyl-transferase(Cpt1),lipoprotein lipase and hepatic lipase,and the mRNA expression levels of cpt1,fabp,fatp,ldlr,and ampk in hepatopancreas increased significantly as dietary choline increased(P<0.05).In addition,hepatopancreas m RNA expression levels of ctl1,ctl2,oct1,badh,bhmt,ck,cept,and cct were generally up-regulated as dietary choline level increased(P<0.01).In conclusion,dietary choline promoted the deposition of choline and its metabolites by up-regulating genes related to choline transport and ***,appropriate dietary choline level promoted the development of hepatopancreas R cells and maintained the n

关键词： Pacific white shrimp Choline Lipid Fatty acid Histology Ampk signaling pathway

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Dietary cholesterol promotes growth and ecdysone signalling pathway by modulating cholesterol transport in swimming crabs(Portunus trituberculatus)

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Animal Nutrition 2022年第3期10卷 249-260页

作者： Tingting Zhu Qicun Zhou Zheng Yang Yingying Zhang Jiaxiang Luo Xiangsheng Zhang Yuedong Shen lefei jiao Douglas R.Tocher Min Jin Laboratory of Fish and Shellfish Nutrition School of Marine SciencesNingbo University315211 NingboChina Guangdong Provincial Key Laboratory of Marine Biotechnology Institute of Marine SciencesShantou University515063 ShantouChina

Cholesterol,as an indispensable nutrient,regulates molting and growth in *** crustaceans are unable to biosynthesize cholesterol de novo,it is central to understand how dietary cholesterol affects molting in *** 8-week feeding trial was conducted to evaluate the effects of dietary cholesterol level(0.12%,0.43%,0.79%,1.00%,1.30%and 2.50%)on growth,cholesterol metabolism and expression of genes related to lipid and ecdysone metabolism in female swimming crabs(Portunus trituberculatus).A total of 192 crabs(1.41±0.05 g)were randomly distributed into 192 *** treatment had 4 replicates with each replicate containing 8 *** fed the 1.00%cholesterol diet showed best growth performance,and thus based on percent weight gain,the optimal dietary cholesterol requirement was calculated at 1.01%.Tissue cholesterol concentrations were positively correlated with dietary cholesterol *** contents of functional fatty acids in hepatopancreas significantly increased as dietary cholesterol increased from 0.12%to 2.50%(P<0.05).The expression levels of genes related to lipogenesis pathway,lipid catabolism and fatty acid oxidation were significantly downregulated with increased dietary cholesterol level(P<0.05).The highest expression levels of cholesterol transport genes,low-density lipoprotein receptor(ldlr)and low-density lipoprotein receptorrelated protein 2(lrp2)occurred in crabs fed the 1.30%cholesterol ***,hormones related to molting such as crustacean hyperglycemic hormone(CHH),methyl farnesoate(MF),molt-inhibiting hormone(MIH),and ecdysone in hemolymph were significantly influenced by dietary cholesterol level(P<0.05).The highest expression levels of ecdysone receptor(ecr)and chitinase 1(chi1)in eyestalk and hepatopancreas were found in crabs fed the diet containing 1.00%cholesterol(P<0.05).In conclusion,the optimal dietary level was beneficial to functional fatty acid accumulation,regulated lipid metabolism,promoted the ecdysone s

关键词： Portunus trituberculatus Cholesterol Lipid metabolism Ecdysone signalling pathway

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Maternal helminth infection protects offspring from high-fat-diet-induced obesity through altered microbiota and SCFAs

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Cellular & Molecular Immunology 2023年第4期20卷 389-403页

作者： Chien-Wen Su Chih-Yu Chen Tangyou Mao Ning Chen Nicholas Steudel lefei jiao Jinggang Lan Alessio Fasano WAllan Walker Hai Ning Shi Mucosal Immunology and Biology Research Center Massachusetts General Hospital and Harvard Medical SchoolCharlestownMAUSA Laboratory for Lipid Medicine and Technology Department of MedicineMassachusetts General Hospital and Harvard Medical SchoolCharlestownMAUSA Department of Gastroenterology Dongfang HospitalBeijing University of Chinese MedicineBeijingChina Shenzhen Institute for Drug Control ShenzhenChina.

Helminth-induced Th2 immunity and gut microbiota have been recently shown to be highly effective in modulating metabolic syndromes in animal *** study aimed to determine whether maternal immunity and microbial factors affect the induction and development of obesity in ***,Heligomosomoides polygyrus(Hp)-infected or control female C57BL/6J mice mated with normal males and their offspring were fed a high-fat diet(HFD)for 9 weeks after *** results showed that Hp-induced maternal outcomes during gestation and lactation significantly impacted offspring metabolic *** was evidenced by results showing that offspring from helminth-infected mothers on an HFD(Hp-offspring+HFD)gained significantly less body weight than those from uninfected mothers(Cont-offspring+HFD).Hp-offspring+HFD exhibited no Th2 phenotype but displayed a pattern of gut microbiota composition similar to that of Hp-infected ***-fostering experiments confirmed that the helminth-induced maternal attenuation of offspring obesity was mediated through both prenatal and postnatal *** results further showed that helminth-infected dams and their offspring had a markedly altered gut microbiome composition,with increased production of short-chain fatty acids(SCFAs).Intriguingly,Hp-infected mothers and Hp-offspring+HFD showed increased SCFA receptor(GPR)expression in adipose and colonic tissues compared to noninfected mothers and Cont-offspring+HFD,***,SCFA supplementation to the pups of uninfected control mothers during lactation protected against HFD-induced weight gain,which corresponded with changes in gut bacterial ***,our findings provide new insights into the complex interaction of maternal immune status and gut microbiome,Hp infection,and the immunity and gut microbiome in obese-prone offspring in infant life.

关键词： Helminth Maternal Th2 immunity Microbiota Offspring Obesity SCFAs

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High dietary lipid level promotes low salinity adaptation in the marine euryhaline crab(Scylla paramamosain)

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Animal Nutrition 2023年第1期12卷 297-307页

作者： Jiaxiang Luo Chen Ren Tingting Zhu Chen Guo Shichao Xie Yingying Zhang Zheng Yang Wenli Zhao Xiangsheng Zhang Jingjing Lu lefei jiao Qicun Zhou Douglas R.Tocher Min Jin Laboratory of Fish and Shellfish Nutrition School of Marine SciencesNingbo UniversityNingbo 315211China Guangdong Provincial Key Laboratory of Marine Biotechnology Institute of Marine SciencesShantou UniversityShantou 515063China

The physiological processes involved in adaptation to osmotic pressure in euryhaline crustaceans are highly energy demanding,but the effects of dietary lipids(fat)on low salinity adaptations have not been well *** the present study,a total of 120 mud crabs(Scylla paramamosain,BW=17.87±1.49 g)were fed control and high-fat(HF)diets,at both medium salinity(23‰)and low salinity(4‰)for 6 wk,and each treatment had 3 replicates with each replicate containing 10 *** results indicated that a HF diet significantly mitigated the reduction in survival rate,percent weight gain and feed efficiency induced by low salinity(P<0.05).Low salinity lowered lipogenesis and activated lipolysis resulting in lipid depletion in the hepatopancreas of mud crabs(P<0.05).Thus,HF diets enhanced the process of lipolysis to supply more *** the gills,low salinity and the HF diet increased the levels of mitochondrial biogenesis markers,the activity of mitochondrial complexes,and the expression levels of genes related to energy metabolism(P<0.05).Consequently,the positive effects of the HF diet on energy metabolism in mud crabs at low salinity promoted osmotic pressure ***,significantly higher haemolymph osmotic pressure and inorganic ion content,as well as higher osmotic pressure regulatory enzyme activity in gills,and gene and protein expression levels of NaK-ATPase were observed in crabs fed the HF diet at low salinity(P<0.05).In summary,high dietary lipid levels improved energy provision to facilitate mitochondrial biogenesis,which increased ATP provision for osmotic pressure regulation of mud *** study also illustrates the importance of dietary lipid nutrition supplementation for low salinity adaptations in mud crabs.

关键词： Osmotic pressure regulation Mitochondrial energy metabolism Lipid metabolism

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对虾微量元素研究进展

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水产学报 2019年第10期43卷 2093-2101页

作者：焦乐飞代恬梦金敏孙蓬周歧存宁波大学海洋学院

微量元素作为多种酶的辅助因子或结构成分,参与机体多种新陈代谢过程,在维持动物健康和正常生理功能中发挥着极其重要的作用。动物对微量元素营养需求极少,但缺乏、过量或摄入不平衡都会对动物机体生长代谢、免疫、繁殖等带来严重不良... 详细信息

微量元素作为多种酶的辅助因子或结构成分,参与机体多种新陈代谢过程,在维持动物健康和正常生理功能中发挥着极其重要的作用。动物对微量元素营养需求极少,但缺乏、过量或摄入不平衡都会对动物机体生长代谢、免疫、繁殖等带来严重不良影响。本文较详细、系统地总结了国内外关于微量元素在对虾生长代谢、免疫、疾病预防、性腺发育等方面的作用,以及对虾对无机和有机微量元素的吸收、转运和代谢机理,为今后开展对虾优质配合饲料研发提供理论依据。

关键词：对虾微量元素营养吸收转运

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小麦替代玉米饲粮添加木聚糖酶对生长猪生长性能、结肠菌群和氮排放的影响

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动物营养学报 2014年第9期26卷 2805-2813页

作者：胡向东焦乐飞李旭彬楼梦茜胡彩虹浙江皇冠科技有限公司杭州310058 浙江大学饲料科学研究所杭州310058

本试验旨在研究小麦替代玉米饲粮添加木聚糖酶对生长猪生长性能、结肠菌群和氮排放的影响。试验选用126头体重约为45 kg的"杜×长×大"三元杂交生长猪,分为7组,每组3个重复,每个重复6头猪。具体分组是:对照组(CON组)饲喂玉米-豆粕型基... 详细信息

本试验旨在研究小麦替代玉米饲粮添加木聚糖酶对生长猪生长性能、结肠菌群和氮排放的影响。试验选用126头体重约为45 kg的"杜×长×大"三元杂交生长猪,分为7组,每组3个重复,每个重复6头猪。具体分组是:对照组(CON组)饲喂玉米-豆粕型基础饲粮,W20组饲喂20%小麦基础饲粮,W20X组饲喂20%小麦基础饲粮+200 U/kg木聚糖酶,W40组饲喂40%小麦基础饲粮,W40X组饲喂40%小麦基础饲粮+200 U/kg木聚糖酶,W60组饲喂60%小麦基础饲粮,W60X组饲喂60%小麦基础饲粮+200 U/kg木聚糖酶。试验期50 d。结果表明:与对照组相比,W60组平均日增重显著降低(P0.05);W40X组结肠乳酸杆菌数量显著增加(P<0.05),大肠杆菌、梭菌数量显著降低(P<0.05),粪样pH、脲酶活性显著降低(P<0.05)。综上所述,木聚糖酶有明显的益生作用,能刺激肠道有益菌增殖并抑制有害菌增殖,减少氮排放。本试验条件下,添加200 U/kg木聚糖酶的小麦饲粮中,小麦最适替代量为40%。

关键词：木聚糖酶小麦肠道菌群氮排放

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饲料不同钙磷比对三疣梭子蟹幼蟹生长性能、矿物质沉积和能量代谢的影响

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水产学报 2021年第10期45卷 1677-1691页

作者：赵明明袁野金敏罗嘉翔王学习胡潇颖程鑫时博焦乐飞周歧存宁波大学海洋学院鱼类与甲壳类营养研究室

为研究饲料中不同钙磷比对三疣梭子蟹幼蟹生长性能、血清生化、矿物质沉积和能量代谢的影响,配制5种等氮等脂(46%粗蛋白和7%粗脂肪)钙磷比分别为1.00∶2.00、1.00∶1.50、1.00∶1.00、1.00∶0.75和1.00∶0.50的实验饲料。选择初始体质量... 详细信息

为研究饲料中不同钙磷比对三疣梭子蟹幼蟹生长性能、血清生化、矿物质沉积和能量代谢的影响,配制5种等氮等脂(46%粗蛋白和7%粗脂肪)钙磷比分别为1.00∶2.00、1.00∶1.50、1.00∶1.00、1.00∶0.75和1.00∶0.50的实验饲料。选择初始体质量为(12.82±0.37) g的梭子蟹150只,随机分成5组(每组3个重复,每个重复10只),进行为期8周的养殖实验。结果显示,钙磷比为1.00∶1.00和1.00∶0.75的饲料,其特定生长率(SGR)和饲料效率(FER)显著高于其他组。钙磷比为1.00∶0.50饲料组幼蟹血淋巴的谷草转氨酶(GOT)显著高于其他组,碱性磷酸酶(AKP)和谷丙转氨酶(GPT)活性随着饲料钙磷比的增加呈上升的趋势。幼蟹肝胰腺、肌肉和甲壳中的磷含量随着钙磷比的升高呈下降的趋势,且钙磷比1.00∶2.00组幼蟹磷含量显著高于1.00∶0.50组。钙磷比1.00∶1.50和1.00∶1.00组幼蟹肝胰腺ATP含量显著高于其他饲料组。幼蟹肝胰腺己糖激酶(HK)和琥珀酸脱氢酶(SDH)的活性随饲料钙磷比的升高呈先升高后下降的趋势,当钙磷比为1时,梭子蟹肝胰腺的HK和SDH酶活性最高。此外,钙磷比1.00∶1.00组显著上调了梭子蟹肝胰腺电子传递链相关基因(nd1、sdhc、cytb和coxⅡ)的表达水平,当钙磷比为1.00∶0.75时,显著上调了幼蟹肝胰腺线粒体能量代谢相关基因(ATPase6、sirt3和nrf1)的表达量。研究表明,本实验条件下,以增重率为评价指标,通过回归模型得到梭子蟹最适钙磷比为1.06～1.26,在此范围内能促进三疣梭子蟹幼蟹的生长、维持组织的最适磷沉积以及很好地促进能量的产生。

关键词：三疣梭子蟹钙磷比生长性能血清生化指标矿物质沉积能量代谢

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Preliminary Evaluation of Hemodynamic Effects of Fontan Palliation on Renal Artery Using Computational Fluid Dynamics

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Congenital Heart Disease 2023年第1期18卷 41-55页

作者： Jinlong Liu Jing Shi Weiru Luo Zhirong Tong lefei Yang Peixuan Sun Tianyi Li Jun Du Qian Wang Institute of Pediatric Translational Medicine Shanghai Children’s Medical CenterSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Shanghai Engineering Research Center of Virtual Reality of Structural Heart Disease Shanghai Children’s Medical CenterSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Department of Imaging Diagnosis Center Shanghai Children's Medical CenterSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina

Background:The assessment of renal function is important to the prognosis of patients needing Fontan palliation due to the reconstructed compromised *** know the relationship between the kidney perfusion and hemodynamic characteristics during surgical design could reduce the risk of acute kidney injury(AKI)and the postoperative ***,the issue is still unsolved because the current clinical evaluation methods are unable to predict the hemodynamic changes in renal artery(RA).Methods:We reconstructed a three-dimensional(3D)vascular model of a patient requiring Fontan *** technique of computational fluid dynamics(CFD)was utilized to explore the changes of RA hemodynamics under different possible blood flow *** relationship between the kidney perfusion and hemodynamic characteristics was ***:The calculated results indicated the declined tendency of the pressure and pressure drop as the flow rate *** the flow rate decreased to two-thirds of its baseline,both the pressure of left renal artery(LRA)and the pressure of right renal artery(RRA)dipped below 50%,and the pressure of RRA fell more quickly than that of *** distribution of WSS was observed on the trunk of RA,and the lowest WSS was found at the distal of *** average WSS in RA dropped to around 50%as the flow rate reached one-third of its ***:As a promising approach,CFD can be utilized to quantitatively evaluate the hemodynamic characteristics of RA and contribute to offsetting the drawbacks of clinical assessments of renal function,to help realize better prognosis for the patients with Fontan palliation.

关键词： Renal artery Fontan palliation hemodynamics computational fluid dynamics surgical design

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Impact of climate change on dengue fever epidemics in South and Southeast Asian settings:A modelling study

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Infectious Disease Modelling 2023年第3期8卷 645-655页

作者： Yawen Wang Shi Zhao Yuchen Wei Kehang Li Xiaoting Jiang Conglu Li Chao Ren Shi Yin Janice Ho Jinjun Ran lefei Han Benny Chung-ying Zee Ka Chun Chong Jockey Club School of Public Health and Primary Care The Chinese University of Hong KongHong Kong Special Administrative RegionChina Centre for Health Systems and Policy Research The Chinese University of Hong KongHong Kong Special Administrative RegionChina Clinical Trials and Biostatistics Laboratory Shenzhen Research InstituteThe Chinese University of Hong KongShenzhenChina Division of Landscape Architecture Department of ArchitectureFaculty of ArchitectureThe University of Hong KongHong Kong Special Administrative RegionChina School of Public Health Shanghai Jiao Tong University School of MedicineShanghaiChina School of Global Health Chinese Center for Tropical Diseases ResearchShanghai Jiao Tong University School of MedicineShanghaiChina

The potential for dengue fever epidemic due to climate change remains uncertain in tropical *** study aims to assess the impact of climate change on dengue fever transmission in four South and Southeast Asian *** collected weekly data of dengue fever incidence,daily mean temperature and rainfall from 2012 to 2020 in Singapore,Colombo,Selangor,and Chiang *** for temperature and rainfall were drawn for three Shared Socioeconomic Pathways(SSP126,SSP245,and SSP585)*** a disease transmission model,we projected the dengue fever epidemics until 2090s and determined the changes in annual peak incidence,peak time,epidemic size,and outbreak duration.A total of 684,639 dengue fever cases were reported in the four locations between 2012 and *** projected change in dengue fever transmission would be most significant under the SSP585 *** comparison to the 2030s,the peak incidence would rise by 1.29 times in Singapore,2.25 times in Colombo,1.36 times in Selangor,and>10 times in Chiang Mai in the 2090s under ***,the peak time was projected to be earlier in Singapore,Colombo,and Selangor,but be later in Chiang Mai under the SSP585 *** in a milder emission scenario of SSP126,the epidemic size was projected to increase by 5.94%,10.81%,12.95%,and 69.60%from the 2030se2090s in Singapore,Colombo,Selangor,and Chiang Mai,*** outbreak durations in the four settings were projected to be prolonged over this century under SSP126 and SSP245,while a slight decrease is expected in 2090s under *** results indicate that climate change is expected to increase the risk of dengue fever transmission in tropical areas of South and Southeast *** greenhouse gas emissions could be crucial in reducing the transmission of dengue fever in the future.

关键词： Temperature Rainfall Extreme weather event Dengue fever

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