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The direct and gut microbiota-mediated effects of dietary bile acids on the improvement of gut barriers in largemouth bass(Micropterus salmoides)

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Animal Nutrition 2023年第3期14卷 32-42页

作者： Rui Xia Qingshuang Zhang Dongmei Xia Qiang Hao Qianwen Ding Chao Ran Yalin Yang aizhi cao Zhen Zhang Zhigang Zhou China-Norway Joint Lab on Fish Gut Microbiota Institute of Feed ResearchChinese Academy of Agricultural SciencesBeijing 100081China Norway-China Joint Lab on Fish Gut Microbiota Institute of BiologyNorwegian University of Science and TechnologyTrondheimNorway Key Laboratory for Feed Biotechnology of the Ministry of Agriculture and Rural Affairs Institute of Feed ResearchChinese Academy of Agricultural SciencesBeijing 100081China Shandong Longchang Animal Health Care Co. Ltd.Jinan 251100China Institute of Animal Husbandry and Veterinary Jiangxi Academy of Agricultural ScienceJiangxi 330000China

Fish gut barrier damage under intensive culture model is a significant concern for aquaculture industry.This study aimed to investigate the effects of bile acids(BAs)on gut barriers in Micropterus salmoides.A germ-free(GF)zebrafish model was employed to elucidate the effects of the direct stimulation of BAs and the indirect regulations mediated by the gut microbiota on gut barrier functions.Four diets were formulated with BAs supplemented at 0,150,300 and 450 mg/kg,and these 4 diets were defined as control,BA150,BA300 and BA450,respectively.After 5 weeks of feeding experiment,the survival rate of fish fed with BA300 diet was increased(P0.05).The results of the gut microbiota transferring experiment demonstrated an upregulation of gut barrier-related genes,including immunoglobulin Z/T(Ig Z/T),IL-6,IL-1βand IL-10,by the gut microbiota transferred from the BA300 group compared with the control(P<0.05).Feeding the BA300 diet directly to GF zebrafish resulted in enhanced expression of Ig M,Ig Z/T,lysozyme,occludin-2,IL-6 and IL-10(P<0.05).In conclusion

关键词： Bile acids Gut barrier Gut microbiota Largemouth bass Germ-free zebrafish

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饲料中添加猪源胆汁酸对肉鸡体内LPS外排功能的影响

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南京农业大学学报 2024年第4期47卷 700-709页

作者：陈良赵敏蝶曹爱智王建民赵茹茜南京农业大学动物医学院/农业农村部动物生理生化重点实验室江苏南京210095 南京农业大学-山东龙昌动物保健品有限公司肝脏健康与稳态调控研究院山东德州253000 怀化市农业科学研究院湖南怀化418000

[目的]本研究旨在探究胆汁酸是否能促进肉鸡体内脂多糖(LPS)外排及其缓解LPS诱导的炎症反应。[方法]选择60只1日龄雄性Ross 308肉鸡,分成4组,每组15只,空白组(CON)和模型组(LPS组)的鸡饲喂基础日粮,低剂量胆汁酸缓解组(LBA组)的鸡饲喂... 详细信息

[目的]本研究旨在探究胆汁酸是否能促进肉鸡体内脂多糖(LPS)外排及其缓解LPS诱导的炎症反应。[方法]选择60只1日龄雄性Ross 308肉鸡,分成4组,每组15只,空白组(CON)和模型组(LPS组)的鸡饲喂基础日粮,低剂量胆汁酸缓解组(LBA组)的鸡饲喂含猪源胆汁酸(160 mg·kg^(-1))的基础日粮,高剂量胆汁酸缓解组(HBA组)的鸡饲喂含猪源胆汁酸(250 mg·kg^(-1))的基础日粮。试验第28天,鸡群禁食9 h后,CON组腹腔注射等体积生理盐水,LPS组、LBA组和HBA组腹腔注射LPS(1 mg·kg^(-1) BW)。LPS注射后3 h翅静脉采血并全部屠宰取样,测定炎症相关指标、LPS水平及肝脏相关LPS摄取和外排基因表达量。[结果]CON组肝脏未发现炎性细胞浸润。LPS组肝脏出现大量炎性细胞浸润且血清IL-1β水平显著增加(P<0.05),血清和肝脏LPS水平及肝脏甘露糖受体C1基因(MRC1)、稳定素1/2基因(STAB 1/2)表达量均显著增加(P<0.05);血清、肝脏、胆汁和盲肠内容物的总胆汁酸(TBA)浓度显著降低(P<0.05),并且肝脏胆盐输出泵(BSEP)、多药耐药蛋白2(MRP2)、多药耐药相关蛋白1(MDR1)、肝X受体α(LXRα)和法尼醇受体(FXR)基因表达量均显著降低(P<0.05)。与LPS组相比,LBA组肝脏炎性细胞浸润减少,血清IL-1β浓度显著降低(P<0.05);血清和肝脏LPS水平、肝脏MRC1、STAB1/2基因表达量均显著降低(P<0.05)。与LPS组相比,HBA组肝脏炎性细胞浸润消失,血清IL-1β浓度、肝脏MRC1、STAB1/2基因的表达量显著降低(P<0.05),血清LPS水平显著降低(P<0.05),而胆汁LPS水平显著增加(P<0.05),血清、胆汁和盲肠内容物总TBA水平和肝脏MDR1、ATP结合盒转运蛋白G2(ABCG2)基因及FXR蛋白表达量均显著增加(P<0.05)。[结论]胆汁酸通过增强肝脏的摄取、合成和外排功能,提高肉鸡体内LPS外排效率,降低机体炎症反应。

关键词：胆汁酸肉鸡炎症反应脂多糖外排功能

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Adsorption Mechanism of Polycarboxylate-Based Superplasticizer in CFBC Ash-Portland Cement Paste

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Journal of Wuhan University of Technology(Materials Science) 2014年第5期29卷 945-949页

作者：宋远明 GUO Chuanchuan QIAN Jueshi LIU Yiquan cao aizhi School of Environmental and Materials Engineering Yantai University School of Materials Science and Engineering Chongqing University School of Civil and Environmental Engineering Nanyang Technological University

Circulating fluidized bed combustion （CFBC） ash exhibits the desirable pozzolanic activity which makes it a potential supplementary cementitious material to replace cement for concrete production. However, the high unburnt carbon content and porous surface structure of CFBC ash may adsorb water reducer and thereby significantly reduce the efficiency of water-reducing agents. The adsorption mechanism of polycarboxylate superplasticizer in CFBC ash-Portland cement paste was investigated by ultraviolet-visible spectrophotometer, and the conception of ＂invalid adsorption site＂ of CFBC ash was presented. The results show that the adsorption behavior of polycarboxylate superplasticizer in coal ash-Portland cement paste can be described by Langmuir isothermal adsorption equation. The adsorption capacity of CFBC ash-Portland cement paste is higher than that of pulverized coal combustion （PCC） fly ash-Portland cement paste. Moreover, the adsorption amount of polycarboxylate superplasticizer increases with the ratio of ash-to-cement in the paste. At last, the fluidity of CFBC ash-Portland cement paste is lower than that of the PCC fly ash paste. This work suggests that when CFBC ash is used as concrete admixture, the poor flowability of the cementitious system due to the high adsorption of water and water-reducing agent should be taken into consideration.

关键词： CFBC ash concrete admixture adsorption polycarboxylate superplasticizer invalid adsorption site

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Dysfunction of synaptic endocytic trafficking in Parkinson's disease

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Neural Regeneration Research 2024年第12期19卷 2649-2660页

作者： Xin Yi Ng Mian cao Programme in Neuroscience and Behavioural Disorders Duke-NUS Medical SchoolSingaporeSingapore Department of Physiology National University of SingaporeSingaporeSingapore

Parkinson's disease is characterized by the selective degeneration of dopamine neurons in the nigrostriatal pathway and dopamine deficiency in the striatum.The precise reasons behind the specific degeneration of these dopamine neurons remain largely elusive.Genetic investigations have identified over 20 causative PARK genes and 90 genomic risk loci associated with both familial and sporadic Parkinson's disease.Notably,several of these genes are linked to the synaptic vesicle recycling process,particularly the clathrinmediated endocytosis pathway.This suggests that impaired synaptic vesicle recycling might represent an early feature of Parkinson's disease,followed by axonal degeneration and the eventual loss of dopamine cell bodies in the midbrain via a"dying back"mechanism.Recently,several new animal and cellular models with Parkinson's disease-linked mutations affecting the endocytic pathway have been created and extensively characterized.These models faithfully recapitulate certain Parkinson's disease-like features at the animal,circuit,and cellular levels,and exhibit defects in synaptic membrane trafficking,further supporting the findings from human genetics and clinical studies.In this review,we will first summarize the cellular and molecular findings from the models of two Parkinson's disease-linked clathrin uncoating proteins:auxilin(DNAJC6/PARK19)and synaptojanin 1(SYNJ1/PARK20).The mouse models carrying these two PARK gene mutations phenocopy each other with specific dopamine terminal pathology and display a potent synergistic effect.Subsequently,we will delve into the involvement of several clathrin-mediated endocytosis-related proteins(GAK,endophilin A1,SAC2/INPP5 F,synaptotagmin-11),identified as Parkinson's disease risk factors through genome-wide association studies,in Parkinson's disease pathogenesis.We will also explore the direct or indirect roles of some common Parkinson's disease-linked proteins(alpha-synuclein(PARK1/4),Parkin(PARK2),and LRRK2(PARK8))in synaptic endocytic trafficking.Additionall

关键词： autophagy auxilin/PARK19 clathrin-mediated endocytosis dopamine neurons neurodegeneration nigrostriatal pathway Parkinson's disease synaptic vesicle recycling synaptojanin1/PARK20

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Dynamic Setting Method of Assessment Indicators for Power Curves of Renewable Energy Sources Considering Scarcity of Reserve Resources

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 101-114页

作者： Minghao cao Jilai Yu the Department of Electrical Engineering Harbin Institute of TechnologyHarbinChina

With the increasing proportion of renewable energy sources(RESs)in power grid,the reserve resource(RR)scarcity for correcting power deviation of RESs has become a potential issue.Consequently,the power curve of RES needs to be more rigorously assessed.The RR scarcity varies during different time periods,so the values of assessment indicators should be dynamically adjusted.The assessment indicators in this paper include two aspects,i.e.,deviation exemption ratio and penalty price.Firstly,this paper proposes a method for dynamically calculating the supply capacity and RR cost,primarily taking into account the operating status of thermal units,forecast information of RES,and load curve.Secondly,after clarifying the logical relationship between the degree of RR scarcity and the values of assessment indicators,this paper establishes a mapping function between them.Based on this mapping function,a dynamic setting method for assessment indicators is proposed.In the future,RES will generally be equipped with battery energy storage systems(BESSs).Reasonably utilizing BESSs to reduce the power deviation of RESs can increase the expected income of RESs.Therefore,this paper proposes a power curve optimization strategy for RESs considering self-owned BESSs.The case study demonstrates that the dynamic setting method of assessment indicators can increase the revenue of RESs while ensuring that the penalty fees paid by RESs to the grid are sufficient to cover the RR costs.Additionally,the power curve optimization strategy can help RESs further increase income and fully utilize BESSs to reduce power deviation.

关键词： Renewable energy battery energy storage system(BESS) power curve assessment reserve service parameter setting

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Zeros of Complete Symmetric Polynomials over Finite Fields

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Journal of Systems Science & Complexity 2024年第4期37卷 1772-1788页

作者： cao Wei School of Mathematics and Statistics Minnan Normal University

Wan and Zhang(2021) obtained a nontrivial lower bound for the number of zeros of complete symmetric polynomials over finite fields, and proposed a problem whether their bound can be improved. In this paper, the author improves Wan-Zhang's bound from three aspects. The proposed results are based on the estimates related to the number of certain permutations and the value sets of non-permutation polynomials associated to the complete symmetric polynomial. And the author believes that there are still possibilities to improve the bounds and hence Wan-Zhang's bound.

关键词： Complete symmetric polynomial finite field permutation polynomial value set

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Bioinspired Closed-loop CPG-based Control of a Robotic Manta for Autonomous Swimming

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Journal of Bionic Engineering 2024年第1期21卷 177-191页

作者： Yiwei Hao Yonghui cao Yingzhuo cao Xiong Mo Qiaogao Huang Lei Gong Guang Pan Yong cao School of Marine Science and Technology Northwestern Polytechnical UniversityXi'an 710072China Unmanned Vehicle Innovation Center Ningbo Institute of NPUNingbo 315103China Key Laboratory of Unmanned Underwater Vehicle Technology of Ministry of Industry and Information Technology Xi'an 710072China

Fish in nature exhibit a variety of swimming modes such as forward swimming,backward swimming,turning,pitching,etc.,enabling them to swim in complex scenes such as coral reefs.It is still difficult for a robotic fish to swim autonomously in a confined area as a real fish.Here,we develop an untethered robotic manta as an experimental platform,which consists of two flexible pectoral fins and a tail fin,with three infrared sensors installed on the front,left,and right sides of the head to sense the surrounding obstacles.To generate multiple swimming modes of the robotic manta and online switching of different modes,we design a closed-loop Central Pattern Generator(CPG)controller based on distance information and use a combination of phase difference and amplitude of the CPG model to achieve stable and rapid adjustment of yaw angle.To verify the autonomous swimming ability of the robotic manta in complex scenes,we design an experimental scenario with a concave obstacle.The experimental results show that the robotic manta can achieve forward swimming,backward swimming,in situ turning within the concave obstacle,and finally exit from the area safely while relying on the perception of external obstacles,which can provide insight into the autonomous exploration of complex scenes by the biomimetic robotic fish.Finally,the swimming ability of the robotic manta is verified by field tests.

关键词： Biomimetic robotic manta Central Pattern Generator Closed-loop control Backward swimming

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Impacts of pancreatic exocrine insufficiency on gut microbiota

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第4期25卷 271-279页

作者： Yulin GUO Feng cao Fei LI Department of General Surgery Xuanwu Hospital of Capital Medical UniversityBeijing 100053China Acute Pancreatitis Clinical Center of Capital Medical University Beijing 100053China

Pancreatic exocrine insufficiency(PEI)can be induced by various kinds of diseases,including chronic pancreatitis,acute pancreatitis,and post-pancreatectomy.The main pathogenetic mechanism of PEI involves the decline of trypsin synthesis,disorder of pancreatic fluid flow,and imbalance of secretion feedback.Animal studies have shown that PEI could induce gut bacterial overgrowth and dysbiosis,with the abundance of Lactobacillus and Bifidobacterium increasing the most,which could be partially reversed by pancreatic enzyme replacement therapy.Clinical studies have also confirmed the association between PEI and the dysbiosis of gut microbiota.Pancreatic exocrine secretions and changes in duodenal p H as well as bile salt malabsorption brought about by PEI may affect and shape the abundance and composition of gut microbiota.In turn,the gut microbiota may impact the pancreatic exocrine acinus through potential bidirectional crosstalk.Going forward,more and higher-quality studies are needed that focus on the mechanism underlying the impact of PEI on the gut microbiota.

关键词： Pancreatic exocrine insufficiency Gut microbiota Gut microbiome Pancreatic enzyme replacement therapy

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Deep learning sheds new light on non-orthogonal optical multiplexing

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Light(Science & Applications) 2024年第5期13卷 808-809页

作者： Zhengzhong Huang Liangcai cao Department of Precision Instruments Tsinghua UniversityBeijingChina

A deep neural network for non-orthogonal input channel encoding is proposed to recover speckle images through a multimode fiber.This novel approach could shed new light on the non-orthogonal optical multiplexing over ... 详细信息

关键词： optical multiplexing scattering

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Angiogenesis in diseases:A half-century excursion from the initial therapeutic concept to current clinical benefits

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Chinese Medical Journal 2024年第6期137卷 636-637页

作者： Yihai cao Department of Microbiology Tumor and Cell BiologyKarolinska InstituteStockholm 17177Sweden

Except a few tissues such as the cornea and cartilage that are avascular,blood vessels constitute a significant proportion of tissue masses in virtually all organs.Under physiological conditions,the adult vasculature remains quiescent to retain tissue and organ homeostatic functions.Too few or too many blood vessels are associated with the onset and progression of many diseases.In response to injuries,most tissues undergo repair by switching on angiogenesis,a key process of new blood vessel formation.^([1])Similarly,angiogenesis is often active in pathological tissues,including tumors and ischemic tissues to aggravate disease progression.

关键词： injuries organs diseases

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