Background:Antibiotic growth promoters are widely used to improve weight gain.However,the abuse of antibiotics can have many negative effects on people.Developing alternatives to antibiotics is an urgent need in lives...Background:Antibiotic growth promoters are widely used to improve weight gain.However,the abuse of antibiotics can have many negative effects on people.Developing alternatives to antibiotics is an urgent need in livestock production.We aimed to perform a meta-analysis and network meta-analysis(NMA)to investigate the effects of feed additives as potential antibiotic substitutes(ASs)on bacteriostasis,growth performance,intestinal morphology and immunity.Furthermore,the primary,secondary,and tertiary ASs were defined by comparing their results with the results of antibiotics.Results:Among 16,309 identified studies,37 were summarized to study the bacteriostasis effects of feed additives,and 89 were included in the meta-analysis and NMA(10,228 pigs).We summarized 268 associations of 57 interventions with 32 bacteria.The order of bacteriostasis effects was as follows:antimicrobial peptides(AMPs)≈antibiotics>organic acids>plant extracts>oligosaccharides.We detected associations of 11 feed additives and 11 outcomes.Compared with a basal diet,plant extract,AMPs,probiotics,microelements,organic acids,bacteriophages,lysozyme,zymin,and oligosaccharides significantly improved growth performance(P<0.05);organic acids,probiotics,microelements,lysozyme,and AMPs remarkably increased the villus height:crypt depth ratio(V/C)(P<0.05);and plant extracts,zymin,microelements,probiotics,and organic acids notably improved immunity(P<0.05).The optimal AMP,bacteriophage,lysozyme,microelements,oligosaccharides,organic acids,plants,plant extracts,probiotics,and zymin doses were 0.100%,0.150%,0.012%,0.010%,0.050%,0.750%,0.20%,0.040%,0.180%,and 0.100%,respectively.Compared with antibiotics,all investigated feed additives exhibited no significant difference in effects on growth performance,IgG,and diarrhoea index/rate(P>0.05);AMPs and microelements significantly increased V/C(P<0.05);and zymin significantly improved lymphocyte levels(P<0.05).Furthermore,linear weighting sum models were used to comprehensively estimate the overall impact of each feed additive on pig growth and health.Conclusions:Our findings suggest that AMPs and plant extracts can be used as primary ASs for weaned piglets and growing pigs,respectively.Bacteriophages,zymin,plants,probiotics,oligosaccharides,lysozyme,and microelements can be regarded as secondary ASs.Nucleotides and organic acids can be considered as tertiary ASs.Future studies should further assess the alternative effects of combinational feed additives.展开更多
Synthesis of silver nanoparticles(Ag NPs) with state-of-the-art chemical or photo-reduction methods generally takes several steps and requires both reducing agents and stabilizers to obtain NPs with narrow size distri...Synthesis of silver nanoparticles(Ag NPs) with state-of-the-art chemical or photo-reduction methods generally takes several steps and requires both reducing agents and stabilizers to obtain NPs with narrow size distribution.Herein, we report a novel method to synthesize Ag NPs rapidly in one step, achieving typical particle sizes in the range from 5 to 15 nm.The synthesis steps only involve three chemicals without any reducing agent: AgNO3 as precursor, polyvinylpyrrolidone(PVP) as stabilizer, and AgCl as photocatalyst.The Ag NPs were supported on carbon and showed excellent performance in thermal catalytic pnitrophenol reduction and nitrobenzene hydrogenation, and as electrocatalyst for the oxygen reduction reaction.展开更多
As a family of cationic host defense peptides,defensins are mainly synthesized by Paneth cells,neutrophils,and epithelial cells,contributing to host defense.Their biological functions in innate immunity,as well as the...As a family of cationic host defense peptides,defensins are mainly synthesized by Paneth cells,neutrophils,and epithelial cells,contributing to host defense.Their biological functions in innate immunity,as well as their structure and activity relationships,along with their mechanisms of action and therapeutic potential,have been of great interest in recent years.To highlight the key research into the role of defensins in human and animal health,we first describe their research history,structural features,evolution,and antimicrobial mechanisms.Next,we cover the role of defensins in immune homeostasis,chemotaxis,mucosal barrier function,gut microbiota regulation,intestinal development and regulation of cell death.Further,we discuss their clinical relevance and therapeutic potential in various diseases,including infectious disease,inflammatory bowel disease,diabetes and obesity,chronic inflammatory lung disease,periodontitis and cancer.Finally,we summarize the current knowledge regarding the nutrient-dependent regulation of defensins,including fatty acids,amino acids,microelements,plant extracts,and probiotics,while considering the clinical application of such regulation.Together,the review summarizes the various biological functions,mechanism of actions and potential clinical significance of defensins,along with the challenges in developing defensins-based therapy,thus providing crucial insights into their biology and potential clinical utility.展开更多
Engineered probiotics can serve as therapeutics based on their ability of produce recombinant immune-stimulating properties.In this study,we built the recombinant Bacillus subtilis WB800 expressing antimicrobial pepti...Engineered probiotics can serve as therapeutics based on their ability of produce recombinant immune-stimulating properties.In this study,we built the recombinant Bacillus subtilis WB800 expressing antimicrobial peptide KR32(WB800-KR32)using genetic engineering methods and investigated its protective effects of nuclear factor-E2-related factor 2(Nrf2)-Kelch-like ECH-associated protein 1(Keap1)pathway activation in intestinal oxidative disturbance induced by enterotoxigenic Escherichia coli(ETEC)K88 in weaned piglets.Twenty-eight weaned piglets were randomly distributed into four treatment groups with seven replicates fed with a basal diet.The feed of the control group(CON)was infused with normal sterilized saline;meanwhile,the ETEC,ETEC+WB800,and ETEC+WB800-KR32 groups were orally administered normal sterilized saline,5×10^(10)CFU(CFU:colony forming units)WB800,and 5×10^(10)CFU WB800-KR32,respectively,on Days 1-14 and all infused with ETEC K881×10^(10)CFU on Days 15-17.The results showed that pretreatment with WB800-KR32 attenuated ETEC-induced intestinal disturbance,improved the mucosal activity of antioxidant enzyme(catalase(CAT),superoxide dismutase(SOD),and glutathione peroxidase(GPx))and decreased the content of malondialdehyde(MDA).More importantly,WB800-KR32 downregulated genes involved in antioxidant defense(GPx and SOD1).Interestingly,WB800-KR32 upregulated the protein expression of Nrf2 and downregulated the protein expression of Keap1 in the ileum.WB800-KR32 markedly changed the richness estimators(Ace and Chao)of gut microbiota and increased the abundance of Eubacterium_rectale_ATCC_33656 in the feces.The results suggested that WB800-KR32 may alleviate ETEC-induced intestinal oxidative injury through the Nrf2-Keap1 pathway,providing a new perspective for WB800-KR32 as potential therapeutics to regulate intestinal oxidative disturbance in ETEC K88 infection.展开更多
Probiotics can improve animal growth performance and intestinal health.Bacillus species,Lactobacillus species,Bifidobacterium species,yeast etc.are the common types of probiotics.However,understanding the effects of p...Probiotics can improve animal growth performance and intestinal health.Bacillus species,Lactobacillus species,Bifidobacterium species,yeast etc.are the common types of probiotics.However,understanding the effects of probiotics on the immune status and gut microbiota of weaning piglets and how the probiotics exert their impact are still limited.This study aimed to investigate the effects of Bacillus amyloliquefaciens 40(BA40)on the performance,immune status and gut microbiota of piglets.A total of 12 litters of newborn piglets were randomly divided into 3 groups.Piglets in control group were orally dosed with phosphate buffered saline;BA40 group and probiotics group were orally gavaged with resuspension BA40 and a probiotics product,respectively.The results showed that BA40 treatment significantly decreased(P<0.05)the diarrhea incidence(from d 5 to 40),diamine oxidase,D-lactate,interleukin(IL)-1βand interferon-γconcentrations compared with control group and probiotics group.Meanwhile BA40 dramatically increased the total antioxidant capacity,IL-10 and secretory immunoglobulin-A concentrations in contrast to control group.For the microbial composition,BA40 modulated the microbiota by improving the abundance of Bacteroides,Phascolarctobacterium(producing short-chain fatty acids)and Desulfovibrio and reducing the proliferation of pathogens(Streptococcus,Tyzzerella,Vellionella and paraeggerthella).Meanwhile,a metabolic function prediction explained that carbohydrate metabolism and amino acid metabolism enriched in BA40 group in contrast to control group and probiotics group.For correlation analysis,the results demonstrated that BA40-enriched Phascolarctobacterium and Desulfovibrio provide insights into strategies for elevating the health status and performance of weaned piglets.Altogether,BA40 exerted stronger ability in decreasing diarrhea incidence and improved antioxidant activity,gut barrier function and immune status of piglets than the other treatments.Our study provided the experimental and theoretical basis for the application of BA40 in pig production.展开更多
Reflective displays have stimulated considerable interest because of their friendly readability and low energy consumption.Herein,we develop a reflective display technique via an electro-microfluidic assembly of parti...Reflective displays have stimulated considerable interest because of their friendly readability and low energy consumption.Herein,we develop a reflective display technique via an electro-microfluidic assembly of particles(eMAP)strategy whereby colored particles assemble into annular and planar structures inside a dyed water droplet to create"open"and"closed"states of a display pixel.Water-in-oil droplets are compressed within microwells to form a pixel array.The particles dispersed in droplets are driven by deformation-strengthened dielectrophoretic force to achieve fast and reversible motion and assemble into multiple structures.This eMAP based device can display designed information in three primary colors with≥170°viewing angle,~0.14 s switching time,and bistability with an optimized material system.This proposed technique demonstrates the basis of a high-performance and energy-saving reflective display,and the display speed and color quality could be further improved by structure and material optimization;exhibiting a potential reflective display technology.展开更多
The gut microbiota is comprised of a diverse array of microorganisms that interact with immune system and exert crucial roles for the health.Changes in the gut microbiota composition and functionality are associated w...The gut microbiota is comprised of a diverse array of microorganisms that interact with immune system and exert crucial roles for the health.Changes in the gut microbiota composition and functionality are associated with multiple diseases.As such,mobilizing a rapid and appropriate antimicrobial response depending on the nature of each stimulus is crucial for maintaining the balance between homeostasis and inflammation in the gut.Major players in this scenario are antimicrobial peptides(AMP),which belong to an ancient defense system found in all organisms and participate in a preservative co-evolution with a complex microbiome.Particularly increasing interactions between AMP and microbiota have been found in the gut.Here,we focus on the mechanisms by which AMP help to maintain a balanced microbiota and advancing our understanding of the circumstances of such balanced interactions between gut microbiota and host AMP.This review aims to provide a comprehensive overview on the interplay of diverse antimicrobial responses with enteric pathogens and the gut microbiota,which should have therapeutic implications for different intestinal disorders.展开更多
Based on preparation of co-fermented defatted rice bran(DFRB)using Bacillus subtilis,Saccharomyces cerevisiae,Lactobacillus plantarum and phytase,the present study aimed to evaluate the effects of cofermented DFRB on ...Based on preparation of co-fermented defatted rice bran(DFRB)using Bacillus subtilis,Saccharomyces cerevisiae,Lactobacillus plantarum and phytase,the present study aimed to evaluate the effects of cofermented DFRB on growth performance,antioxidant capacity,immune status,gut microbiota and permeability in finishing pigs.Ninety finishing pigs(85.30±0.97 kg)were randomly assigned to 3treatments(3 replicates/treatment)with a basal diet(Ctrl),a basal diet supplemented with 10% unfermented DFRB(UFR),and a basal diet supplemented with 10% fermented DFRB(FR)for 30 d.Results revealed that the diet supplemented with FR notably(P<0.05)improved the average daily gain(ADG),gain to feed ratio(G:F)and the digestibility of crude protein,amino acids and dietary fiber of finishing pigs compared with UFR.Additionally,FR supplementation significantly(P<0.05)increased total antioxidant capacity,the activities of superoxide dismutase and catalase,and decreased the content of malonaldehyde in serum.Furthermore,FR remarkably(P<0.05)increased serum levels of Ig G,antiinflammatory cytokines(IL-22 and IL-23)and reduced pro-inflammatory cytokines(TNF-α,IL-1β and INF-γ).The decrease of serum diamine oxidase activity and serum D-lactate content in the FR group(P<0.05)suggested an improvement in intestinal permeability.Supplementation of FR also elevated the content of acetate and butyrate in feces(P<0.05).Moreover,FR enhanced gut microbial richness and the abundance of fiber-degrading bacteria such as Clostridium butyricum and Lactobacillus amylovorus.Correlation analyses indicated dietary fiber in FR was associated with improvements in immune status,intestinal permeability and the level of butyrate-producing microbe C.butyricum,which was also verified by the in vitro fermentation analysis.These findings provided an experimental and theoretical basis for the application of fermented DFRB in finishing pigs.展开更多
In biological responses,fatty acids(FA)are absorbed and metabolized in the form of substrates for energy production.The molecular structures(number of double bonds and chain length)and composition of dietary FA impact...In biological responses,fatty acids(FA)are absorbed and metabolized in the form of substrates for energy production.The molecular structures(number of double bonds and chain length)and composition of dietary FA impact digestion,absorption and metabolism,and the biological roles of FA.Recently,increasing evidence indicates that FA are essentially utilized as an energy source and are signaling molecules that exert physiological activity of gut microbiota and immune responses.In addition,FA could serve as natural ligands for orphan G protein-coupled receptors(GPCR),also called free fatty acid receptors(FFAR),which intertwine metabolic and immune systems via multiple mechanisms.The present review explores the recent findings on FA absorption and its impact on gut health,particularly addressing the mechanism by which dietary FA potentially influences intestinal microbiota and epithelial functions.Also,this work attempts to uncover research ideas for devising future strategies for manipulating the composition of dietary FA to regulate gut health and support a normal immune system for metabolic and immune disorders.展开更多
Dear editor,Endotoxic shock usually results from infection-induced physiologic, pathologic, and biologic abnormalities(Singer et al., 2016). Undeniably, it is still a profoundly damaging and life-threatening condition...Dear editor,Endotoxic shock usually results from infection-induced physiologic, pathologic, and biologic abnormalities(Singer et al., 2016). Undeniably, it is still a profoundly damaging and life-threatening condition for many individuals(Guan et al., 2019;Ding et al., 2021). Studies have shown that it is associated with the accumulation of apoptotic markers(Kayagaki et al., 2015;Zong et al., 2019).展开更多
Heat stress is a very universal stress event in recent years.Various lines of evidence in the past literatures indicate that gut microbiota composition is susceptible to variable temperature.A varied microbiota is nec...Heat stress is a very universal stress event in recent years.Various lines of evidence in the past literatures indicate that gut microbiota composition is susceptible to variable temperature.A varied microbiota is necessary for optimal regulation of host signaling pathways and disrupting microbiota-host homeostasis that induces disease pathology.The microbiota-gut-brain axis involves an interactive mode of communication between the microbes colonizing the gut and brain function.This review summarizes the effects of heat stress on intestinal function and microbiota-gut-brain axis.Heat stress negatively affects intestinal immunity and barrier functions.Microbiota-gut-brain axis is involved in the homeostasis of the gut microbiota,at the same time,heat stress affects the metabolites of microbiota which could alter the function of microbiota-gut-brain axis.We aim to bridge the evidence that the microbiota is adapted to survive and thrive in an extreme environment.Additionally,nutritional strategies for alleviating intestinal heat stress are introduced.展开更多
基金supported by the Key Program of the National Natural Science Foundation of China(3163000269)National Special Fund for Modern Industrial Technology System(CARS-35)Major Science and Technology Special Fund of Zhejiang Province(2015C02022)。
文摘Background:Antibiotic growth promoters are widely used to improve weight gain.However,the abuse of antibiotics can have many negative effects on people.Developing alternatives to antibiotics is an urgent need in livestock production.We aimed to perform a meta-analysis and network meta-analysis(NMA)to investigate the effects of feed additives as potential antibiotic substitutes(ASs)on bacteriostasis,growth performance,intestinal morphology and immunity.Furthermore,the primary,secondary,and tertiary ASs were defined by comparing their results with the results of antibiotics.Results:Among 16,309 identified studies,37 were summarized to study the bacteriostasis effects of feed additives,and 89 were included in the meta-analysis and NMA(10,228 pigs).We summarized 268 associations of 57 interventions with 32 bacteria.The order of bacteriostasis effects was as follows:antimicrobial peptides(AMPs)≈antibiotics>organic acids>plant extracts>oligosaccharides.We detected associations of 11 feed additives and 11 outcomes.Compared with a basal diet,plant extract,AMPs,probiotics,microelements,organic acids,bacteriophages,lysozyme,zymin,and oligosaccharides significantly improved growth performance(P<0.05);organic acids,probiotics,microelements,lysozyme,and AMPs remarkably increased the villus height:crypt depth ratio(V/C)(P<0.05);and plant extracts,zymin,microelements,probiotics,and organic acids notably improved immunity(P<0.05).The optimal AMP,bacteriophage,lysozyme,microelements,oligosaccharides,organic acids,plants,plant extracts,probiotics,and zymin doses were 0.100%,0.150%,0.012%,0.010%,0.050%,0.750%,0.20%,0.040%,0.180%,and 0.100%,respectively.Compared with antibiotics,all investigated feed additives exhibited no significant difference in effects on growth performance,IgG,and diarrhoea index/rate(P>0.05);AMPs and microelements significantly increased V/C(P<0.05);and zymin significantly improved lymphocyte levels(P<0.05).Furthermore,linear weighting sum models were used to comprehensively estimate the overall impact of each feed additive on pig growth and health.Conclusions:Our findings suggest that AMPs and plant extracts can be used as primary ASs for weaned piglets and growing pigs,respectively.Bacteriophages,zymin,plants,probiotics,oligosaccharides,lysozyme,and microelements can be regarded as secondary ASs.Nucleotides and organic acids can be considered as tertiary ASs.Future studies should further assess the alternative effects of combinational feed additives.
基金the financial support from the National Natural Science Foundation of China (61574065)Science and Technology Planning Project of Guangdong Province (2016B090906004, 2016B090918083)+7 种基金the Special Fund Project of Science and Technology Application in Guangdong (2017B020240002)graduate student abroad joint training project of South China Normal Universitypartially supported by PCSIRT Project No.IRT_17R40Guangdong Provincial Key Laboratory of Optical Information Materials and Technology (No.2017B030301007)MOE International Laboratory for Optical Information TechnologiesShenzhen Science and Technology Plan (No.JSGG20170414143009027)National 111 ProjectGuangdong Innovative Research Team Program (No.2013C102)
文摘Synthesis of silver nanoparticles(Ag NPs) with state-of-the-art chemical or photo-reduction methods generally takes several steps and requires both reducing agents and stabilizers to obtain NPs with narrow size distribution.Herein, we report a novel method to synthesize Ag NPs rapidly in one step, achieving typical particle sizes in the range from 5 to 15 nm.The synthesis steps only involve three chemicals without any reducing agent: AgNO3 as precursor, polyvinylpyrrolidone(PVP) as stabilizer, and AgCl as photocatalyst.The Ag NPs were supported on carbon and showed excellent performance in thermal catalytic pnitrophenol reduction and nitrobenzene hydrogenation, and as electrocatalyst for the oxygen reduction reaction.
基金We gratefully acknowledge the financial support provided by the Zhejiang Provincial Key R&D Program of China(2021C02008)the China Agriculture Research System of MOF and MARA(CARS-35)+3 种基金the National Natural Science Foundation of China(Grant Nos.32002185,31930057 and U21A20249)the National Key R&D Program(2018YFA0507802)Taishan Industrial Leading Talents ProjectProgram from National Center of Technology Innovation for Pigs for this study。
文摘As a family of cationic host defense peptides,defensins are mainly synthesized by Paneth cells,neutrophils,and epithelial cells,contributing to host defense.Their biological functions in innate immunity,as well as their structure and activity relationships,along with their mechanisms of action and therapeutic potential,have been of great interest in recent years.To highlight the key research into the role of defensins in human and animal health,we first describe their research history,structural features,evolution,and antimicrobial mechanisms.Next,we cover the role of defensins in immune homeostasis,chemotaxis,mucosal barrier function,gut microbiota regulation,intestinal development and regulation of cell death.Further,we discuss their clinical relevance and therapeutic potential in various diseases,including infectious disease,inflammatory bowel disease,diabetes and obesity,chronic inflammatory lung disease,periodontitis and cancer.Finally,we summarize the current knowledge regarding the nutrient-dependent regulation of defensins,including fatty acids,amino acids,microelements,plant extracts,and probiotics,while considering the clinical application of such regulation.Together,the review summarizes the various biological functions,mechanism of actions and potential clinical significance of defensins,along with the challenges in developing defensins-based therapy,thus providing crucial insights into their biology and potential clinical utility.
基金supported by the Zhejiang Provincial Key R&D Program of China(No.2021C02008)the China Agriculture Research System of MOF and MARA(No.CARS-35)+2 种基金the National Natural Science Foundation of China(No.32022079)the Fundamental Research Funds for the Central Universities(No.2022QZJH46)the Taishan Industrial Leading Talents Project.
文摘Engineered probiotics can serve as therapeutics based on their ability of produce recombinant immune-stimulating properties.In this study,we built the recombinant Bacillus subtilis WB800 expressing antimicrobial peptide KR32(WB800-KR32)using genetic engineering methods and investigated its protective effects of nuclear factor-E2-related factor 2(Nrf2)-Kelch-like ECH-associated protein 1(Keap1)pathway activation in intestinal oxidative disturbance induced by enterotoxigenic Escherichia coli(ETEC)K88 in weaned piglets.Twenty-eight weaned piglets were randomly distributed into four treatment groups with seven replicates fed with a basal diet.The feed of the control group(CON)was infused with normal sterilized saline;meanwhile,the ETEC,ETEC+WB800,and ETEC+WB800-KR32 groups were orally administered normal sterilized saline,5×10^(10)CFU(CFU:colony forming units)WB800,and 5×10^(10)CFU WB800-KR32,respectively,on Days 1-14 and all infused with ETEC K881×10^(10)CFU on Days 15-17.The results showed that pretreatment with WB800-KR32 attenuated ETEC-induced intestinal disturbance,improved the mucosal activity of antioxidant enzyme(catalase(CAT),superoxide dismutase(SOD),and glutathione peroxidase(GPx))and decreased the content of malondialdehyde(MDA).More importantly,WB800-KR32 downregulated genes involved in antioxidant defense(GPx and SOD1).Interestingly,WB800-KR32 upregulated the protein expression of Nrf2 and downregulated the protein expression of Keap1 in the ileum.WB800-KR32 markedly changed the richness estimators(Ace and Chao)of gut microbiota and increased the abundance of Eubacterium_rectale_ATCC_33656 in the feces.The results suggested that WB800-KR32 may alleviate ETEC-induced intestinal oxidative injury through the Nrf2-Keap1 pathway,providing a new perspective for WB800-KR32 as potential therapeutics to regulate intestinal oxidative disturbance in ETEC K88 infection.
基金This research was supported by the fund from Science and Technology Projects of Zhejiang(2021C02008,CTZB-2020080127)China Agricultural Research System(CARS-35)National Center of Technology Innovation for Pigs.
文摘Probiotics can improve animal growth performance and intestinal health.Bacillus species,Lactobacillus species,Bifidobacterium species,yeast etc.are the common types of probiotics.However,understanding the effects of probiotics on the immune status and gut microbiota of weaning piglets and how the probiotics exert their impact are still limited.This study aimed to investigate the effects of Bacillus amyloliquefaciens 40(BA40)on the performance,immune status and gut microbiota of piglets.A total of 12 litters of newborn piglets were randomly divided into 3 groups.Piglets in control group were orally dosed with phosphate buffered saline;BA40 group and probiotics group were orally gavaged with resuspension BA40 and a probiotics product,respectively.The results showed that BA40 treatment significantly decreased(P<0.05)the diarrhea incidence(from d 5 to 40),diamine oxidase,D-lactate,interleukin(IL)-1βand interferon-γconcentrations compared with control group and probiotics group.Meanwhile BA40 dramatically increased the total antioxidant capacity,IL-10 and secretory immunoglobulin-A concentrations in contrast to control group.For the microbial composition,BA40 modulated the microbiota by improving the abundance of Bacteroides,Phascolarctobacterium(producing short-chain fatty acids)and Desulfovibrio and reducing the proliferation of pathogens(Streptococcus,Tyzzerella,Vellionella and paraeggerthella).Meanwhile,a metabolic function prediction explained that carbohydrate metabolism and amino acid metabolism enriched in BA40 group in contrast to control group and probiotics group.For correlation analysis,the results demonstrated that BA40-enriched Phascolarctobacterium and Desulfovibrio provide insights into strategies for elevating the health status and performance of weaned piglets.Altogether,BA40 exerted stronger ability in decreasing diarrhea incidence and improved antioxidant activity,gut barrier function and immune status of piglets than the other treatments.Our study provided the experimental and theoretical basis for the application of BA40 in pig production.
基金support from the Key Project of the National Natural Science Foundation of China(No.12131010)the Special Project for Marine Economy Development of Guangdong Province(GDNRC[2023]26)+1 种基金the International Cooperation Base of Infrared Reflection Liquid Crystal Polymers and Device(2015B050501010)P.M.acknowledges support under ARC Grant CE170100026.
文摘Reflective displays have stimulated considerable interest because of their friendly readability and low energy consumption.Herein,we develop a reflective display technique via an electro-microfluidic assembly of particles(eMAP)strategy whereby colored particles assemble into annular and planar structures inside a dyed water droplet to create"open"and"closed"states of a display pixel.Water-in-oil droplets are compressed within microwells to form a pixel array.The particles dispersed in droplets are driven by deformation-strengthened dielectrophoretic force to achieve fast and reversible motion and assemble into multiple structures.This eMAP based device can display designed information in three primary colors with≥170°viewing angle,~0.14 s switching time,and bistability with an optimized material system.This proposed technique demonstrates the basis of a high-performance and energy-saving reflective display,and the display speed and color quality could be further improved by structure and material optimization;exhibiting a potential reflective display technology.
基金funded by the National Natural Science Foundation of China(Grant No.31702123 and 31630075)Zhejiang Provincial Natural Science Foundation of China(Grant No.LZ20C170005)Fundamental Research Funds for the Central Universities(Grant No.2020-KYY-517102-0001)
文摘The gut microbiota is comprised of a diverse array of microorganisms that interact with immune system and exert crucial roles for the health.Changes in the gut microbiota composition and functionality are associated with multiple diseases.As such,mobilizing a rapid and appropriate antimicrobial response depending on the nature of each stimulus is crucial for maintaining the balance between homeostasis and inflammation in the gut.Major players in this scenario are antimicrobial peptides(AMP),which belong to an ancient defense system found in all organisms and participate in a preservative co-evolution with a complex microbiome.Particularly increasing interactions between AMP and microbiota have been found in the gut.Here,we focus on the mechanisms by which AMP help to maintain a balanced microbiota and advancing our understanding of the circumstances of such balanced interactions between gut microbiota and host AMP.This review aims to provide a comprehensive overview on the interplay of diverse antimicrobial responses with enteric pathogens and the gut microbiota,which should have therapeutic implications for different intestinal disorders.
基金Science and Technology Projects of Zhejiang(2022C02043,2021C02008,CTZB-2020080127)China Agriculture Research System(CARS-35)National Center of Technology Innovation for Pigs。
文摘Based on preparation of co-fermented defatted rice bran(DFRB)using Bacillus subtilis,Saccharomyces cerevisiae,Lactobacillus plantarum and phytase,the present study aimed to evaluate the effects of cofermented DFRB on growth performance,antioxidant capacity,immune status,gut microbiota and permeability in finishing pigs.Ninety finishing pigs(85.30±0.97 kg)were randomly assigned to 3treatments(3 replicates/treatment)with a basal diet(Ctrl),a basal diet supplemented with 10% unfermented DFRB(UFR),and a basal diet supplemented with 10% fermented DFRB(FR)for 30 d.Results revealed that the diet supplemented with FR notably(P<0.05)improved the average daily gain(ADG),gain to feed ratio(G:F)and the digestibility of crude protein,amino acids and dietary fiber of finishing pigs compared with UFR.Additionally,FR supplementation significantly(P<0.05)increased total antioxidant capacity,the activities of superoxide dismutase and catalase,and decreased the content of malonaldehyde in serum.Furthermore,FR remarkably(P<0.05)increased serum levels of Ig G,antiinflammatory cytokines(IL-22 and IL-23)and reduced pro-inflammatory cytokines(TNF-α,IL-1β and INF-γ).The decrease of serum diamine oxidase activity and serum D-lactate content in the FR group(P<0.05)suggested an improvement in intestinal permeability.Supplementation of FR also elevated the content of acetate and butyrate in feces(P<0.05).Moreover,FR enhanced gut microbial richness and the abundance of fiber-degrading bacteria such as Clostridium butyricum and Lactobacillus amylovorus.Correlation analyses indicated dietary fiber in FR was associated with improvements in immune status,intestinal permeability and the level of butyrate-producing microbe C.butyricum,which was also verified by the in vitro fermentation analysis.These findings provided an experimental and theoretical basis for the application of fermented DFRB in finishing pigs.
基金funded by Zhejiang Provincial Key R&D Program of China(2021C02008)the National Natural Science Foundation of China(Grant Nos.31630075,32002185,and 31860648)Zhejiang Provincial Natural Science Foundation of China(Grant No.LQ21C170002)。
文摘In biological responses,fatty acids(FA)are absorbed and metabolized in the form of substrates for energy production.The molecular structures(number of double bonds and chain length)and composition of dietary FA impact digestion,absorption and metabolism,and the biological roles of FA.Recently,increasing evidence indicates that FA are essentially utilized as an energy source and are signaling molecules that exert physiological activity of gut microbiota and immune responses.In addition,FA could serve as natural ligands for orphan G protein-coupled receptors(GPCR),also called free fatty acid receptors(FFAR),which intertwine metabolic and immune systems via multiple mechanisms.The present review explores the recent findings on FA absorption and its impact on gut health,particularly addressing the mechanism by which dietary FA potentially influences intestinal microbiota and epithelial functions.Also,this work attempts to uncover research ideas for devising future strategies for manipulating the composition of dietary FA to regulate gut health and support a normal immune system for metabolic and immune disorders.
基金This work was supported by the National Natural Science Foundation of China(32002185 and 31630075)Zhejiang Provincial Natural Science Foundation of China(LQ21C170002)China Postdoctoral Science Foundation(2020M671741).
文摘Dear editor,Endotoxic shock usually results from infection-induced physiologic, pathologic, and biologic abnormalities(Singer et al., 2016). Undeniably, it is still a profoundly damaging and life-threatening condition for many individuals(Guan et al., 2019;Ding et al., 2021). Studies have shown that it is associated with the accumulation of apoptotic markers(Kayagaki et al., 2015;Zong et al., 2019).
基金supported by National Natural Science Foundation of China(Grant Nos.32022079,31630075,and 31702123)Zhejiang Provincial Natural Science Foundation of China(Grant No.LZ20C170005)Fundamental Research Funds for the Central Universities(Grant No.2020-KYY-517102-0001)。
文摘Heat stress is a very universal stress event in recent years.Various lines of evidence in the past literatures indicate that gut microbiota composition is susceptible to variable temperature.A varied microbiota is necessary for optimal regulation of host signaling pathways and disrupting microbiota-host homeostasis that induces disease pathology.The microbiota-gut-brain axis involves an interactive mode of communication between the microbes colonizing the gut and brain function.This review summarizes the effects of heat stress on intestinal function and microbiota-gut-brain axis.Heat stress negatively affects intestinal immunity and barrier functions.Microbiota-gut-brain axis is involved in the homeostasis of the gut microbiota,at the same time,heat stress affects the metabolites of microbiota which could alter the function of microbiota-gut-brain axis.We aim to bridge the evidence that the microbiota is adapted to survive and thrive in an extreme environment.Additionally,nutritional strategies for alleviating intestinal heat stress are introduced.
