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Ferroptosis contributes to JEV-induced neuronal damage and neuroinflammation

Virologica Sinica 2024年第1期39卷 144-155页

作者： Wenjing Zhu Qi Li Yong Yin Huanchun Chen Youhui Si Bibo Zhu Shengbo Cao Zikai Zhao Jing Ye National Key Laboratory of agricultural Microbiology Huazhong Agricultural UniversityWuhan430070China Frontiers Science Center for animal Breeding and Sustainable production Huazhong Agricultural UniversityWuhan430070China The Cooperative Innovation Center for Sustainable Pig production Huazhong Agricultural UniversityWuhan430070China Hubei Hongshan Laboratory Wuhan430070China

Ferroptosis is a newly discovered prototype of programmed cell death (PCD) driven by iron-dependent phospholipid peroxidation accumulation, and it has been linked to numerous organ injuries and degenerative pathologies. Although studies have shown that a variety of cell death processes contribute to JEV-induced neuroinflammation and neuronal injury, there is currently limited research on the specific involvement of ferroptosis. In this study, we explored the neuronal ferroptosis induced by JEV infection in vitro and in vivo. Our results indicated that JEV infection induces neuronal ferroptosis through inhibiting the function of the antioxidant system mediated by glutathione (GSH)/glutathione peroxidase 4 (GPX4), as well as by promoting lipid peroxidation mediated by yes-associated protein 1 (YAP1)/long-chain acyl-CoA synthetase 4 (ACSL4). Further analyses revealed that JEV E and prM proteins function as agonists, inducing ferroptosis. Moreover, we found that treatment with a ferroptosis inhibitor in JEV-infected mice reduces the viral titers and inflammation in the mouse brains, ultimately improving the survival rate of infected mice. In conclusion, our study unveils a critical role of ferroptosis in the pathogenesis of JEV, providing new ideas for the prevention and treatment of viral encephalitis.

关键词： Japanese encephalitisvirus(JEV) Ferroptosis Neuron Lipid peroxidation Inflammatory response

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The virulence regulator AbsR in avian pathogenic Escherichia coli has pleiotropic effects on bacterial physiology

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Journal of Integrative Agriculture 2024年第2期23卷 649-668页

作者： Dongfang Zhao Haobo Zhang Xinyang Zhang Fengwei Jiang Yijing Li Wentong Cai Ganwu Li State Key Laboratory for animal Disease Control and Prevention Harbin Veterinary Research InstituteChinese Academy of Agricultural SciencesHarbin 150069China College of Veterinary Medicine Northeast Agricultural UniversityHarbin 150038China National animal Tuberculosis Reference Laboratory Division of Zoonoses SurveillanceChina Animal Health and Epidemiology CenterQingdao 266032China Department of Veterinary Diagnostic and production animal Medicine College of Veterinary MedicineIowa State UniversityAmesIowa 50011-1134the United States

Avian pathogenic Escherichia coli(APEC)belonging to extraintestinal pathogenic ***(ExPEC)can cause severe infections in extraintestinal tissues in birds and humans,such as the lungs and ***(microcin production regulation,locus A,herein renamed AbsR,a blood survival regulator),a member of the MarR(multiple antibiotic resistance regulator)transcriptional regulator family,governs the expression of capsule biosynthetic genes in human ExPEC and represents a promising druggable target for ***,a deep understanding of the AbsR regulatory mechanism as well as its regulon is *** this study,we present a systems-level analysis of the APEC AbsR regulon using ChIP-Seq(chromatin immunoprecipitation sequencing)and RNA-Seq(RNA sequencing)*** found that AbsR directly regulates 99 genes and indirectly regulates 667 ***,we showed that:1)AbsR contributes to antiphagocytotic effects by macrophages and virulence in a mouse model for systemic infection by directly activating the capsular gene cluster;2)AbsR positively impacts biofilm formation via direct regulation of the T2SS(type II secretion system)but plays a marginal role in virulence;and 3)AbsR directly upregulates the acid tolerance signaling system EvgAS to withstand acid stress but is dispensable in ExPEC ***,our data indicate that the role of AbsR in virulence gene regulation is relatively conserved in ExPEC ***,this study provides a comprehensive analysis of the AbsR regulon and regulatory mechanism,and our data suggest that AbsR likely influences virulence primarily through the control of capsule ***,we found that AbsR severely represses the expression of the type I-F CRISPR(clustered regularly interspaced short palindromic repeats)-Cas(CRISPR associated)systems,which could have implications in CRISPR biology and application.

关键词： avian pathogenic Escherichia coli(APEC) extraintestinal pathogenic Escherichia coli(ExPEC) AbsR RNA-Seq ChIP-Seq gene regulation

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Source and level of dietary iron influence semen quality by affecting inflammation, oxidative stress and iron utilization levels in boars

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Journal of animal Science and Biotechnology 2024年第5期15卷 2044-2058页

作者： Yinghui Wu Yamei Li Yueyue Miao Hongkui Wei Hefeng Luo Chunxiao Ren Yawei Zhang Juan Chen Tanghong Wei Jiyan Deng Jian Peng Department of animal Nutrition and Feed Science College of Animal Science and TechnologyHuazhong Agricultural UniversityWuhan 430070China The Cooperative Innovation Center for Sustainable Pig production Wuhan 400700China Frontiers Science Center for animal Breeding and Sustainable production Wuhan 430070China Dekon Food and Agriculture Group Chengdu 610000China Xingjia Bio-Engineering Co.Ltd Changsha 410011China

Background Boars fed a mixed form of inorganic and organic iron in excess of the NRC recommended levels still develop anemia,which suggested that the current level and form of iron supplementation in boar diets may be ***,56 healthy Topeka E line boars aged 15–21 months were randomly divided into 5 groups:basal diet supplemented with 96 mg/kg ferrous sulfate(FeSO_(4))and 54 mg/kg glycine chelated iron(Gly-Fe,control);80 mg/kg or 115 mg/kg Gly-Fe;80 mg/kg or 115 mg/kg methionine hydroxyl analogue chelated iron(MHA-Fe,from CalimetFe)for 16 *** effects of dietary iron supplementation with different sources and levels on semen quality in boars were *** 1)Serum Fe and hemoglobin concentrations were not affected by reduced dietary iron levels in the 80 mg/kg or 115 mg/kg Gly-Fe and MHA-Fe groups compared with the control group(P>0.05).2)Serum interleukin-6(IL-6)and sperm malondialdehyde(MDA)levels in the 80 mg/kg or 115 mg/kg MHA-Fe groups were lower than those in the control group(P<0.05),and higher serum superoxide dismutase levels and lower MDA levels in the 115 mg/kg MHA-Fe group(P<0.05).3)Boars in the 80 mg/kg or 115 mg/kg Gly-Fe and MHA-Fe groups had lower serum hepcidin(P<0.01),ferritin(P<0.05),and transferrin receptor(P<0.01)concentrations,and boars in the 115 mg/kg MHA-Fe group had higher seminal plasma Fe concentrations compared with the control group.4)Boars in the 80 mg/kg and 115 mg/kg MHA-Fe groups had lower abnormal sperm rate and in situ oscillating sperm ratio compared to the control group at weeks 12 and/or 16 of the ***,the effect of Gly-Fe on improving semen quality in boars was not evident.5)Serum IL-6 level was positively correlated with hepcidin concentration(P<0.05),which in turn was significantly positively correlated with abnormal sperm rate(P<0.05).Furthermore,significant correlations were also found between indicators of iron status and oxidative stress and semen quality ***

关键词： Adult boars Iron level Iron source Iron status Semen quality

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The effect of abiotic stresses on plant C:N:P homeostasis and their mitigation by silicon

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The Crop Journal 2024年第2期12卷 340-353页

作者： Milton Garcia Costa Renato de Mello Prado Luiz Fabiano Palaretti Jonas Pereira de Souza Júnior Department of agricultural production Science School of Agricultural and Veterinarian SciencesSão Paulo State UniversityJaboticabalBrazil

In crop plants, various environmental stresses affect the balance of carbon, nitrogen, and phosphorus(C:N:P), leading to biochemical and physiological alterations and reductions in yield. Silicon(Si) is a beneficial element that alleviates plant stress. Most studies involving silicon have focused on physiological responses, such as improvements in photosynthetic processes, water use efficiency, and antioxidant defense systems. But recent research suggests that stressed plants facing either limited or excessive resources(water, light, nutrients, and toxic elements), strategically employ Si to maintain C:N:P homeostasis, thereby minimizing biomass losses. Understanding the role of Si in mitigating the impact of abiotic stresses on plants by regulating C:N:P homeostasis holds great potential for advancing sustainable agricultural practices in crop production. This review presents recent advances in characterizing the influence of environmental stresses on C:N:P homeostasis, as well as the role of Si in preserving C:N:P equilibrium and attenuating biological damage associated with abiotic stress. It underscores the beneficial effects of Si in sustaining C:N:P homeostasis and increasing yield via improved nutritional efficiency and stress mitigation.

关键词： Nutritional stoichiometry Elemental stoichiometry Beneficial element Environmental stresses Nutritional efficiency Carbon use efficiency agricultural sustainability

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Gut microbiota intervention attenuates thermogenesis in broilers exposed to high temperature through modulation of the hypothalamic 5‑HT pathway

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Journal of animal Science and Biotechnology 2024年第2期15卷 679-698页

作者： Sheng Li Xiaoqing Li Kai Wang Yansen Li Kentaro Nagaoka Chunmei Li research Centre for Livestock Environmental Control and Smart production College of Animal Science and TechnologyNanjing Agricultural UniversityNanjing 210095China Laboratory of Veterinary Physiology Department of Veterinary MedicineFaculty of AgricultureTokyo University of Agriculture and TechnologyTokyo 183‑8509Japan

Background Broilers have a robust metabolism and high body temperature,which make them less tolerant to hightemperature(HT)environments and more susceptible to challenges from elevated *** microbes,functioning as symbionts within the host,possess the capacity to significantly regulate the physiological functions and environmental adaptability of the *** study aims to investigate the effects of gut microbial intervention on the body temperature and thermogenesis of broilers at different ambient temperatures,as well as the underlying mechanism involving the"gut-brain"*** Broilers were subjected to gut microbiota interference with or without antibiotics(control or ABX)starting at 1 day of *** 21 day of age,they were divided into 4 groups and exposed to different environments for 7 d:The control and ABX groups at room temperature(RT,24±1℃,60%relative humidity(RH),24 h/d)and the control-HT and ABX-HT groups at high temperature(HT,32±1℃,60%RH,24 h/d).Results The results demonstrated that the antibiotic-induced gut microbiota intervention increased body weight and improved feed conversion in broiler chickens(P<0.05).Under HT conditions,the microbiota intervention reduced the rectal temperature of broiler chickens(P<0.05),inhibited the expression of avUCP and thermogenesisrelated genes in breast muscle and liver(P<0.05),and thus decreased thermogenesis ***,the gut microbiota intervention blunted the hypothalamic‒pituitary‒adrenal axis and hypothalamic–pituitary–thyroid axis activation induced by HT *** analyzing the cecal microbiota composition of control and ABX chickens maintained under HT conditions,we found that Alistipes was enriched in control *** contrast,antibioticinduced gut microbiota intervention resulted in a decrease in the relative abundance of Alistipes(P<0.05).Moreover,this difference was accompanied by increased hypothalamic 5-hydroxytryptamine(5-HT)content and TPH2 expression(P<0.05).Conclus

关键词： 5-HT Broiler chickens Gut microbiota Thermogenesis Thermoregulation

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Abomasal infusion of branched-chain amino acids or branched-chain keto-acids alter lactation performance and liver triglycerides in fresh cows

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Journal of animal Science and Biotechnology 2024年第3期15卷 1145-1157页

作者： Kristen Gallagher Isabelle Bernstein Cynthia Collings David Main Ghayyoor Ahmad Sarah Naughton Jayasimha Daddam Vengai Mavangira Mike Vandehaar Zheng Zhou Department of animal Science Michigan State UniversityEast Lansing 48824USA Department of Veterinary Diagnostic and production animal Medicine Ames 50011USA

Background Dairy cows are at high risk of fatty liver disease in early lactation,but current preventative measures are not always *** with fatty liver have lower circulating branched-chain amino acid(BCAA)concentra-tions whereas cows with high circulating BCAA levels have low liver triglyceride(TG).Our objective was to determine the impact of BCAA and their corresponding ketoacids(branched-chain ketoacids,BCKA)on production performance and liver TG accumulation in Holstein cows in the first 3 weeks *** Thirty-six multiparous Holstein cows were used in a randomized block design *** were abomasally infused for the first 21 d postpartum with solutions of 1)saline(CON,n=12);2)BCA(67 g valine,50 g leu-cine,and 34 g isoleucine,n=12);and 3)BCK(77 g 2-ketovaline calcium salt,57 g 2-ketoleucine calcium salt,and 39 g 2-ketoisoleucine calcium salt,n=12).All cows received the same *** effects were determined using PROC GLIMMIX in *** No differences were detected for body weight,body condition score,or dry matter intake averaged over the first 21 d *** receiving BCK had significantly lower liver TG concentrations compared to CON(6.60%vs.4.77%,standard error of the mean(SEM)0.49)during the first 3 weeks of *** of BCA increased milk yield(39.5 vs.35.3 kg/d,SEM 1.8),milk fat yield(2.10 vs.1.69 kg/d,SEM 0.08),and lactose yield(2.11 vs.1.67 kg/d,SEM 0.07)compared with *** to CON,cows receiving BCA had lower plasma glucose(55.0 vs.59.2 mg/dL,SEM 0.86)but higherβ-hydroxybutyrate(9.17 vs.6.00 mg/dL,SEM 0.80).Conclusions Overall,BCAA supplementation in this study improved milk production,whereas BCKA supplementa-tion reduced TG accumulation in the liver of fresh cows.

关键词： Branched-chain amino acids Branched-chain ketoacids Fatty liver Fresh cow

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Ginkgo biloba extract alleviates fatty liver hemorrhagic syndrome in laying hens via reshaping gut microbiota

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Journal of animal Science and Biotechnology 2024年第1期15卷 277-294页

作者： Xinyue Yang Depeng Li Meihong Zhang Yuqing Feng Xiaolu Jin Dan Liu Yuming Guo Yongfei Hu State Key Laboratory of animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China

Background Ginkgo biloba extract(GBE)is evidenced to be effective in the prevention and alleviation of metabolic disorders,including obesity,diabetes and fatty liver ***,the role of GBE in alleviating fatty liver hemorrhagic syndrome(FLHS)in laying hens and the underlying mechanisms remain to be ***,we investigated the effects of GBE on relieving FLHS with an emphasis on the modulatory role of GBE in chicken gut *** The results showed that GBE treatment ameliorated biochemical blood indicators in high-fat diet(HFD)-induced FLHS laying hen model by decreasing the levels of TG,TC,ALT and *** lipid accumulation and pathological score of liver were also relieved after GBE ***,GBE treatment enhanced the antioxidant activity of liver and serum by increasing GSH,SOD,T-AOC,GSH-PX and reducing MDA,and downregulated the expression of genes related to lipid synthesis(FAS,LXRα,GPAT1,PPARγand Ch REBP1)and inflammatory cytokines(TNF-α,IL-6,TLR4 and NF-κB)in the *** profiling analysis revealed that GBE treatment reshaped the HFD-perturbed gut microbiota,particularly elevated the abundance of Megasphaera in the ***,targeted metabolomic analysis of SCFAs revealed that GBE treatment significantly promoted the production of total SCFAs,acetate and propionate,which were positively correlated with the GBE-enriched gut ***,we confirmed that the GBE-altered gut microbiota was sufficient to alleviate FLHS by fecal microbiota transplantation(FMT).Conclusions We provided evidence that GBE alleviated FLHS in HFD-induced laying hens through reshaping the composition of gut *** findings shed light on mechanism underlying the anti-FLHS efficacy of GBE and lay foundations for future use of GBE as additive to prevent and control FLHS in laying hen industry.

关键词： Antioxidation Fecal microbiota transplantation FLHS Ginkgo biloba extract Inflammation Megasphaera

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KLF4 facilitates chromatin accessibility remodeling in porcine early embryos

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Science China(Life Sciences) 2024年第1期67卷 96-112页

作者： Wei Zhu Guowei Bu Ruifeng Hu Jixiang Zhang Lianyong Qiao Kai Zhou Tingting Wang Qiao Li Jingjing Zhang Linhui Wu Yali Xie Taotao Hu Shichun Yang Jiaqi Guan Xiaoyu Chu Juanjuan Shi Xia Zhang Falong Lu Xin Liu Yi-Liang Miao Institute of Stem Cell and Regenerative Biology College of Animal Science and Veterinary MedicineHuazhong Agricultural UniversityWuhan 430070China Key Laboratory of agricultural animal Genetics Breeding and Reproduction(Huazhong Agricultural University)Ministry of EducationWuhan 430070China State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyInnovative Academy of Seed DesignChinese Academy of SciencesBeijing 100101China Frontiers Science Center for animal Breeding and Sustainable production Huazhong Agricultural UniversityWuhan 430070China Hubei Hongshan Laboratory Wuhan 430070China

Chromatin accessibility remodeling driven by pioneer factors is critical for the development of early *** studies have illustrated several pioneer factors as being important for agricultural animals,but what are the pioneer factors and how the pioneer factors remodel the chromatin accessibility in porcine early embryos is not *** employing low-input DNase-seq(liDNase-seq),we profiled the landscapes of chromatin accessibility in porcine early embryos and uncovered a unique chromatin accessibility reprogramming pattern during porcine preimplantation *** data revealed that KLF4 played critical roles in remodeling chromatin accessibility in porcine early *** down of KLF4 led to the reduction of chromatin accessibility in early embryos,whereas KLF4 overexpression promoted the chromatin openness in porcine ***,KLF4 deficiency resulted in mitochondrial dysfunction and developmental failure of porcine *** addition,we found that overexpression of KLF4 in blastocysts promoted lipid droplet accumulation,whereas knockdown of KLF4 disrupted this *** together,our study revealed the chromatin accessibility dynamics and identified KLF4 as a key regulator in chromatin accessibility and cellular metabolism during porcine preimplantation embryo development.

关键词： porcine embryos liDNase-seq chromatin accessibility KLF4 mitochondrion lipid droplets

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Repeated inoculation with rumen fluid accelerates the rumen bacterial transition with no benefit on production performance in postpartum Holstein dairy cows

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Journal of animal Science and Biotechnology 2024年第2期15卷 795-811页

作者： Fanlin Kong Feiran Wang Yijia Zhang Shuo Wang Wei Wang Shengli Li Beijing Engineering Technology research Center of Raw Milk Quality and Safety Control State Key Laboratory of Animal NutritionDepartment of Animal Nutrition and Feed ScienceCollege of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193PR China College of Veterinary Medicine Nanjing Agricultural UniversityNanjingJiangsu 210095PR China

Background The dairy cow’s postpartum period is characterized by dramatic physiological changes,therefore imposing severe challenges on the animal for maintaining health and milk *** dynamics of the ruminal microbiota are also tremendous and may play a crucial role in lactation *** aim to investigate the potential benefits of early microbial intervention by fresh rumen microbiota transplantation(RMT)and sterile RMT in postpartum dairy *** fistulated peak-lactation dairy cows were selected to be the donors for rumen fluid *** postpartum cows were divided into 3 groups as the transplantation receptors respectively receiving 10 L fresh rumen fluid(FR),10 L sterile rumen fluid(SR),or 10 L saline(CON)during 3 d after *** production performance,plasma indices,plasma lipidome,ruminal microbiome,and liver transcriptome were *** fresh and sterile RMT,we found that the molar proportion of propionic acid was increased on d 7 in the FR and SR groups and the bacterial composition was also significantly changed when compared with the CON group.A similarity analysis showed that the similarities between the CON group and FR or SR group on d 7 were 48.40%or 47.85%,whereas the similarities between microbiota on d 7 and 21 in the FR and SR groups were 68.34%or 66.85%.Dry matter intake and feed efficiency were not affected by ***β-hydroxybutyrate concentration in the FR group was decreased and significantly different lipids mainly included phosphatidylcholine and lysophosphatidylcholine containing polyunsaturated fatty *** transcriptomics analysis indicated acutephase response pathways were upregulated in the SR *** Our study suggests that RMT can shorten the transition process of the ruminal microbiota of postpartum dairy cows with no benefit on dry matter intake or feed *** with rumen fluid may not be a useful approach to promote the recovery of postpartum dairy cows.

关键词： Dairy cow Lipidomics Liver Rumen microbiota transplantation Transition period

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Dietary supplementation of laminarin improves the reproductive performance of sows and the growth of suckling piglets

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Journal of animal Science and Biotechnology 2024年第1期15卷 329-343页

作者： Pengguang Zhang Guoyuan Jiang Chenghong Ma Yubo Wang Enfa Yan Linjuan He Jianxin Guo Xin Zhang Jingdong Yin State Key Laboratory of animal Nutrition and Feeding College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China

Background Maternal nutrition is essential in keeping a highly efficient production system in the pig *** has been shown to improve antioxidant capacity,reduce the inflammatory response,and favor the homeostasis of intestinal ***,the effect of dietary supplementation of laminarin on the reproductive performance of sows and the growth of suckling offspring remains *** A total of 40 Landrace×Yorkshire multiparous sows on d 85 of gestation,similar in age,body weight(BW),parity and reproductive performance,were randomly divided into four dietary treatments with 10 sows per treatment,receiving a control diet(basal pregnancy or lactating diets)and a basal diet supplemented with 0.025%,0.05%and 0.10%laminarin,*** experiment lasted from d 85 of gestation to d 21 of *** Laminarin supplementation linearly increased number born alive per litter(P=0.03),average daily feed intake(ADFI,P<0.01),and total milk yield of sows during the lactation of 1–21 d(P=0.02).Furthermore,maternal laminarin supplementation increased the average daily gain(ADG)of piglets while tending to reduce the culling and death rate before *** addition,alterations to the composition of colostrum and milk,as well as to serum inflammatory cytokines and immunoglobulins of sows were *** fecal microbiota profile of sows supported the improvement of reproductive performance in sows and the growth performance in suckling *** Dietary supplementation of laminarin during late pregnancy and lactation could significantly improve reproductive performance of sows and growth performance of piglets.

关键词： Fecal microbiota Laminarin Milk Piglets Reproductive performance Sows

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