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Effects of hydroxyproline supplementation in low fish meal diets on collagen synthesis, myofiber development and muscular texture of juvenile Pacific white shrimp(Litopenaeus vannamei)

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Animal Nutrition 2024年第2期17卷 428-437页

作者： Menglin Shi Haoming Li Tianyu Chen Bocheng Huang Xiaoyue Li Xiaohui Dong Shuyan Chi Qihui Yang Hongyu Liu Junming Deng Beiping Tan Shuang Zhang Shiwei Xie laboratory of Aquatic Nutrition and Feed College of Fisheries Guangdong Ocean University Aquatic animals Precision Nutrition and High-Efficiency Feed Engineering Research Centre of guangdong Province key laboratory of Aquatic Livestock and Poultry Feed Science and Technology in South China Ministry of Agriculture guangdong Provincial key Lab of Aquatic animals Disease Control and Healthy Culture

This experiment aimed to evaluate the impact of dietary hydroxyproline(Hyp) supplementation on the muscle quality of juvenile Pacific white shrimp(Litopenaeus vannamei) fed a low fishmeal diet. Six formulated diets included one high fishmeal(HF; 25% fishmeal content) and five low fishmeal diets(10%fishmeal content) with 0%, 0.2%, 0.4%, 0.6% and 0.8% Hyp(LF0, LF2, LF4, LF6 and LF8, respectively). Each diet was assigned to four replicates, and 40 shrimp(0.32 ± 0.00 g) per replicate were fed four times a day for 8 weeks. Dietary Hyp supplementation had little effects on growth performance, but increased the contents of Hyp, prolyl 4-hydroxylases(P4Hs), and collagen. The meat yield, springiness, hardness,chewiness, and cohesiveness of muscle were the highest in the LF4 group among the low fishmeal groups(P < 0.05). Cooking loss and freezing loss of muscle were the lowest in the LF4 group(P < 0.05). Dietary supplementation with 0.4% Hyp increased the myofiber density and decreased the myofiber diameter of muscle(P < 0.05). Supplementation of Hyp in the diet up-regulated the mRNA expression of smyhc5,smyhc15, col1a1, col1a2, igf-1f, tgf-β and tor and down-regulated the mRNA expression of smyhc1, smyhc2,smyhc6a(P < 0.05). Supplementation of Hyp in the diet up-regulated the protein expression of P-4E-BP1,P-AKT, AKT and P-AKT/AKT(P < 0.05). These results suggested that the addition of 0.4% Hyp to low fishmeal diets improved the muscle quality of L. vannamei.

关键词： Hydroxyproline Collagen Muscle quality Litopenaeus vannamei

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Mandarin fish von Hippel-Lindau protein regulates the NF-κB signaling pathway via interaction with IκB to promote fish ranavirus replication

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Zoological Research 2024年第5期45卷 990-1000页

作者： Zhi-Min Li Xiao-Wei Qin Qi Zhang Jian He Min-Cong Liang Chuan-Rui Li Yang Yu Weng-Hui Liu Shao-Ping Weng Jian-Guo He Chang-Jun Guo School of Marine Sciences State Key Laboratory for BiocontrolSouthern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Guangdong Province Key Laboratory of Aquatic Economic Animals&Guangdong Provincial Observation and Research Station for Marine Ranching of the Lingdingyang BaySun Yat-sen UniversityGuangzhouGuangdong 510275China guangdong laboratory for Lingnan Modern Agriculture South China Agricultural UniversityGuangzhouGuangdong 510640China

The von Hippel-Lindau tumor suppressor protein(VHL),an E3 ubiquitin ligase,functions as a critical regulator of the oxygen-sensing pathway for targeting hypoxia-inducible *** evidence suggests that mammalian VHL may also be critical to the NF-κB signaling pathway,although the specific molecular mechanisms remain ***,the roles of mandarin fish(Siniperca chuatsi)VHL(scVHL)in the NF-κB signaling pathway and mandarin fish ranavirus(MRV)replication were *** transcription of scVHL was induced by immune stimulation and MRV infection,indicating a potential role in innate ***-luciferase reporter gene assays and reverse transcription quantitative PCR(RT-qPCR)results demonstrated that scVHL evoked and positively regulated the NF-κB signaling *** with NF-κB signaling pathway inhibitors indicated that the role of scVHL may be mediated through scIKKα,scIKKβ,scIκBα,or ***-immunoprecipitation(Co-IP)analysis identified scIκBαas a novel target protein of ***,scVHL targeted scIκBαto catalyze the formation of K63-linked polyubiquitin chains to activate the NF-κB signaling *** MRV infection,NF-κB signaling remained activated,which,in turn,promoted MRV *** findings suggest that scVHL not only positively regulates NF-κB but also significantly enhances MRV *** study reveals a novel function of scVHL in NF-κB signaling and viral infection in fish.

关键词： VHL NF-κB IκBα Ranavirus Mandarin fish

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Genetic mechanism of body size variation in groupers:Insights from phylotranscriptomics

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Zoological Research 2024年第2期45卷 314-328页

作者： Wei-Wei Zhang Zhuo-Ying Weng Xi Wang Yang Yang Duo Li Le Wang Xiao-Chun Liu Zi-Ning Meng State key laboratory of Biocontrol Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory of Aquatic Economic AnimalsSchool of Life SciencesSun Yat-sen UniversityGuangzhouGuangdong 510275China Southern laboratory of Ocean Science and Engineering(Zhuhai) ZhuhaiGuangdong 519000China Area of Ecology and Biodiversity School of Biological SciencesUniversity of Hong KongHong Kong SAR 999077China Molecular Population Genetics Group Temasek Life Sciences LaboratorySingapore City 117604Singapore

Animal body size variation is of particular interest in evolutionary biology,but the genetic basis remains largely *** studies have shown the presence of two parallel evolutionary genetic clusters within the fish genus Epinephelus with evident divergence in body size,providing an excellent opportunity to investigate the genetic basis of body size variation in ***,we performed phylotranscriptomic analysis and reconstructed the phylogeny of 13 epinephelids originating from the South China *** genetic clades with an estimated divergence time of approximately 15.4 million years ago were correlated with large and small body size,respectively.A total of 180 rapidly evolving genes and two positively selected genes were identified between the two *** enrichment analyses of these candidate genes revealed distinct enrichment categories between the two *** pathways and genes may play important roles in body size variation in groupers through complex regulatory *** on our results,we speculate that the ancestors of the two divergent groups of groupers may have adapted to different environments through habitat selection,leading to genetic variations in metabolic patterns,organ development,and lifespan,resulting in body size divergence between the two locally adapted *** findings provide important insights into the genetic mechanisms underlying body size variation in groupers and species differentiation.

关键词： Phylotranscriptomics Grouper Body size Rapidly evolving genes(REGs) Positively selected genes(PSGs)

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Production of linear alkylbenzene over Ce containing Beta zeolites

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Chinese Journal of Chemical Engineering 2024年第3期67卷 220-227页

作者： Shiqi Zhang Shengzhi Gan Baoyu Liu Jinxiang Dong School of Chemical Engineering and Light Industry Guangdong Provincial Key Laboratory of Plant Resources BiorefineryGuangzhou Key Laboratory of Clean Transportation Energy ChemistryGuangdong University of TechnologyGuangzhou 510006China Jieyang Branch of Chemistry and Chemical Engineering guangdong laboratory(Rongjiang laboratory) Jieyang 515200China

Ce-encapsulated Beta zeolite was synthesized by a one-pot hydrothermal method with citric acid complexing Ce in the absence of Na *** citric acid can effectively prevent the deposition of Ce species during the hydrothermal synthesis of zeolites,leading to uniform distribution of Ce cluster in the framework of Beta ***,the sodium-free synthesis system resulted that the Brønsted acid sites were mainly located on the straight channels and external surface of Beta zeolites,improving the utilization of Brønsted acid *** addition,Ce encapsulated Beta zeolites showed enhanced activity and robust stability in the alkylation of benzene with 1-dodecene based on the synergistic effect between Ce species and Brønsted acid sites,which pave the way for its practical application in the production of alkylbenzene.

关键词： Beta zeolites Catalysis Alkylation Long-chain olefins

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Advancing electrochemical drilling process via coupling of flow field and electric field in pulsating state generated by a novel tube tool

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Chinese Journal of Aeronautics 2024年第4期37卷 542-555页

作者： Liang CHENG Xiaolei CHEN Zhisen YE Yongjun ZHANG State key laboratory of Precision Electronic Manufacturing Technology and Equipment Guangdong University of TechnologyGuangzhou 510006China guangdong key laboratory of Advanced Manufacturing Technology of Marine Energy Equipment Guangdong University of TechnologyGuangzhou 510006China Guangzhou key laboratory of Nontraditional Machining and Equipment Guangdong University of TechnologyGuangzhou 510006China

This paper introduces an improvement to electrochemical drilling process by coupling flow field and electric field in pulsating state. A novel tube with half-wedged shape at the end(HW-tube) is prepared, with both sidewall and wedged part of the HW-tube insulated. Only the flat part is utilized to provide electric field for electrochemical drilling. By rotating the HW-tube, both flow field and electric field in pulsating state are generated, alternating in different positions within the inter-electrode gap(IEG). The pulsating flow field enhances the mass transfer process, while pulsating electric field disperses material dissolution process and distribution of electrolytic byproducts. Both pulsating fields are coupled at the same frequency, further enhancing the electrochemical drilling process. Simulation results indicate that both flow field and electric field in pulsating state are generated. Compared to the traditional tube, the HW-tube significantly reduces the number of residual particles in IEG, and this number is further reduced by increasing the rotation speed. Experimental results reveal that the surface quality and dimensional uniformity of small hole are improved with HW-tube. With feed rate of 2.22 mm/min, a small hole with diameter of 1.52± 0.017 mm is drilled, resulting in a surface roughness of 0.331 μm.

关键词： Small holes Electrochemical drilling Tools Pulsating flow field Pulsating electric field

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Wear behavior of copper material removal during fluid jet polishing:A comparative study between experiment and simulation

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Friction 2024年第8期12卷 1680-1695页

作者： Wenjing ZHANG Xin ZHANG Tiancheng AI Dan GUO Guoshun PAN State key laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China guangdong Provincial key laboratory of Optomechatronics Shenzhen 518057China

As a crucial part in micro-electromechanical manufacture,local ultra-precision processing of highly ductile copper is expected to be realized by fluid jet polishing(FJP),which widely utilized in optical *** copper exhibits different wear behavior from stiff and brittle material,there is currently no abrasive wear prediction model applicable for copper to investigate the polishing *** research reveals that the copper material removal is dominated by deformation wear rather than cutting wear through abrasive jet impact experiments and localized wear scars analysis.A three-dimensional gas-liquid-particle triphasic wear model for copper in FJP is developed by considering impact energy and wear mechanism ***,validation assessments at various working pressures and impingement angles achieve the goodness-of-fit up to 0.92–0.97 in quantitative comparison between simulations and experimental measurements,which demonstrate the wear prediction ability of the proposed *** investigation facilitates a better understanding of copper wear mechanism and provides theoretical guidance for FJP process optimization.

关键词： fluid jet polishing(FJP) wear mechanism computational fluid mechanics wear model material removal

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Improved observation of colonized roots reveals the regulation of arbuscule development and senescence by drought stress in the arbuscular mycorrhizae of citrus

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Horticultural Plant Journal 2024年第2期10卷 425-436页

作者： Xilong Yin Wei Zhang Zengwei Feng Guangda Feng Honghui Zhu Qing Yao College of Horticulture South China Agricultural UniversityKey Laboratory of Biology and Genetic Improvement of Horticultural Crops(South China)Ministry of Agriculture and Rural AffairsGuangdong Province Key Laboratory of Microbial Signals and Disease ControlGuangzhouGuangdong 510642China key laboratory of Agricultural Microbiomics and Precision Application Ministry of Agriculture and Rural AffairsGuangdong Provincial Key Laboratory of Microbial Culture Collection and ApplicationKey Laboratory of Agricultural MicrobiomicsState Key Laboratory of Applied Microbiology Southern ChinaGuangdong Microbial Culture Collection Center(GDMCC)Institute of MicrobiologyGuangdong Academy of SciencesGuangzhouGuangdong 510070China

Citrus is the typical mycorrhizal fruit tree species establishing symbiosis with arbuscular mycorrhizal (AM) fungi. However, arbuscule development and senescence in colonized citrus roots, especially in response to drought stress, remain unclear, which is mainly due to the difficulty in clearing and staining lignified roots with the conventional method. Here, we improved the observation of colonized roots of citrus plants with the sectioning method, which enabled the clear observation of AM fungal structures. Furthermore, we investigated the effects of one week of drought stress on arbuscule development and senescence with the sectioning method. Microscopy observations indicated that drought stress significantly decreased mycorrhizal colonization (F%and M%) although it did not affect plant growth performance. Fluorescence probes (WGA 488 and/or Nile red) revealed that drought stress inhibited arbuscule development by increasing the percentage of arbuscules at the early stage and decreasing the percentages of arbuscules at the midterm and mature stages. Meanwhile, drought stress accelerated arbuscule senescence, which was characterized by the increased accumulation of neutral lipids. Overall, the sectioning method developed in this study enables the in-depth investigation of arbuscule status, and drought stress can inhibit arbuscule development but accelerate arbuscule senescence in the colonized roots of citrus plants. This study paves the way to elaborately dissecting the arbuscule dynamics in the roots of fruit tree species in response to diverse abiotic stresses.

关键词： Arbuscular mycorrhizae Citrus Drought stress Arbuscule development Arbuscule senescence Fruit tree species

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MiR-106a targets ATG7 to inhibit autophagy and angiogenesis after myocardial infarction

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Animal Models and Experimental Medicine 2024年第4期7卷 408-418页

作者： Guofeng Bai Jinghao Yang Weili Liao Xiaofeng Zhou Yingting He Nian Li Liuhong Zhang Yifei Wang Xiaoli Dong Hao Zhang Jinchun Pan Liangxue Lai Xiaolong Yuan Xilong Wang guangdong Provincial key laboratory of laboratory animals Guangdong Laboratory Animals Monitoring InstituteGuangzhouChina guangdong laboratory of Lingnan Modern Agriculture National Engineering Research Center for Breeding Swine IndustryState Key Laboratory of Swine and Poultry Breeding IndustryGuangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular BreedingCollege of Animal ScienceSouth China Agricultural UniversityGuangzhouGuangdongChina Huidong County Animal Quarantine and Inspection Institute HuizhouGuangdongChina Department of Cardiology Hainan General HospitalHainan Affiliated Hospital of Hainan Medical UniversityHainan Clinical Medicine Research InstitutionHaikouPeople's Republic of China key laboratory of Regenerative Biology Guangzhou Institutes of Biomedicine and HealthChinese Academy of SciencesGuangzhouGuangdongChina

Background:Myocardial infarction(MI)is an acute condition in which the heart mus-cle dies due to the lack of blood *** research has suggested that au-tophagy and angiogenesis play vital roles in the prevention of heart failure after MI,and miR-106a is considered to be an important regulatory factor in *** the specific mechanism remains *** this study,using cultured venous endothelial cells and a rat model of MI,we aimed to identify the potential target genes of miR-106a and discover the mechanisms of inhibiting autophagy and ***:We first explored the biological functions of miR-106a on autophagy and angiogenesis on endothelial *** we identified ATG7,which was the down-stream target gene of *** expression of miR-106a and ATG7 was investi-gated in the rat model of ***:We found that miR-106a inhibits the proliferation,cell cycle,autophagy and angiogenesis,but promoted the apoptosis of vein endothelial ***,ATG7 was identified as the target of miR-106a,and ATG7 rescued the inhibition of autophagy and angiogenesis by *** expression of miR-106a in the rat model of MI was decreased but the expression of ATG7 was increased in the infarction ***:Our results indicate that miR-106a may inhibit autophagy and angiogenesis by targeting *** mechanism may be a potential therapeutic treatment for MI.

关键词： angiogenesis ATG7 autophagy miR-106a miRNAs myocardial infarction

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Atomic-resolution Interfacial Microstructure and Thermo-electro-magnetic Energy Conversion Performance of Gd/Bi0.5Sb1.5Te3 Composites

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Energy & Environmental Materials 2024年第4期7卷 355-363页

作者： Chengshan Liu Wenjie Xu Ping Wei Shaoqiu Ke Wenjun Cui Longzhou Li Dong Liang Xianfeng Ye Tiantian Chen Xiaolei Nie Wanting Zhu Wenyu Zhao Qingjie Zhang State key laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Foshan Xianhu laboratory of the Advanced Energy Science and Technology guangdong laboratory

Thermo-electro-magnetic materials with simultaneously large magnetocaloric(MC) and thermoelectric (TE) effects are the core part for designing TE/MC all-solid-state cooling *** MC phase with TE material is an effective ***,the elemental diffusion and chemical reaction occurring at the two-phase interfaces could significantly impair the cooling performance.

关键词： interfacial reaction magnetocaloric performance thermoelectric performance thermo-electro-magnetic materials

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Multimodal Nature of the Single-cell Primate Brain Atlas:Morphology,Transcriptome,Electrophysiology,and Connectivity

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Neuroscience Bulletin 2024年第4期40卷 517-532页

作者： Yuhui Shen Mingting Shao Zhao-Zhe Hao Mengyao Huang Nana Xu Sheng Liu State key laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhou510060China guangdong Province key laboratory of Brain Function and Disease Guangzhou510080China

Primates exhibit complex brain structures that augment cognitive *** neocortex fulfills high-cognitive functions through billions of connected *** neurons have distinct transcriptomic,morphological,and electrophysiological properties,and their connectivity principles *** features endow the primate brain atlas with a multimodal *** recent integration of next-generation sequencing with modified patch-clamp techniques is revolutionizing the way to census the primate neocortex,enabling a multimodal neuronal atlas to be established in great detail:(1)single-cell/single-nucleus RNA-seq technology establishes high-throughput transcriptomic references,covering all major transcriptomic cell types;(2)patch-seq links the morphological and electrophysiological features to the transcriptomic reference;(3)multicell patch-clamp delineates the principles of local ***,we review the applications of these technologies in the primate neocortex and discuss the current advances and tentative gaps for a comprehensive understanding of the primate neocortex.

关键词： Neuron Brain atlas Patch-seq Connectivity Primate

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