To investigate the in vitro digestion and fermentation properties of soybean oligosaccharides(SBOS)extracted from defatted soybean meal,the changes in monosaccharide composition and molecular mass were analyzed.Subseq...To investigate the in vitro digestion and fermentation properties of soybean oligosaccharides(SBOS)extracted from defatted soybean meal,the changes in monosaccharide composition and molecular mass were analyzed.Subsequently,the effect of SBOS on microbial community structure and metabolites was studied by 16S rRNA gene sequencing and untargeted metabolomics based on liquid chromatography-mass spectrometry.Results showed that SBOS was not easily enzymolyzed during simulated digestion and could reach the large intestine through the digestive system.The significant decrease in the molecular mass of SBOS after in vitro fermentation indicated its utilization by the gut microbiota,which increased the contents of short-chain fatty acids and lactic acid,thereby reducing the pH of the fermentation broth.Moreover,the core community was found to consist of Blautia,Lactobacillaceae,and Pediococcus.SBOS up-regulated beneficial differential metabolites such as myo-inositol,lactose,and glucose,which were closely related to galactose,amino sugar,and nucleotide sugar metabolism.This study will provide a reference for exploring the relationship between the gut microbiota and the metabolites of SBOS,and provide a basis for the development and application of SBOS as an ingredient for functional products.展开更多
Ethiprole is widely used as a second-generation phenyl pyrazole insecticide.Previous studies indicated that ethiprole exhibited thyroid toxicity while two main metabolites(ethiprole sulfone(M1)and ethiprole sulfide(M2...Ethiprole is widely used as a second-generation phenyl pyrazole insecticide.Previous studies indicated that ethiprole exhibited thyroid toxicity while two main metabolites(ethiprole sulfone(M1)and ethiprole sulfide(M2))of ethiprole showed higher acute toxicity than ethiprole.Therefore,assessing the thyroid toxicity of its metabolites is crucial for safety assessment.In this study,the thyroid toxicity and underlying mechanisms of ethiprole and its metabolites were explored using in silico,in vitro,and in vivo assays,with the aim of conducting a comparative study on thyroid toxicity.Molecular docking analysis showed that ethiprole,M1 and M2 could bind with thyroid receptor isoforms and exhibited higher binding affinity compared to 3,3,5-triiodothyronine(T3).GH3 cell proliferation assays revealed that ethiprole,M1 and M2 all served as thyroid hormone antagonists to hinder the T3-induced cell proliferation.Using the zebrafish model,we further investigated that exposure to ethiprole,M1,and M2 disrupted thyroid hormone levels and the transcriptional expressions of hypothalamus-pituitary-thyroid(HPT)axis-related genes.Ethiprole induced thyroid disrupting effects by binding with the thyroid receptor beta,M1 mainly through binding with the corticotropin releasing factor receptor-1,and M2 exposure firstly inhibited the thyroid peroxidase enzyme activity.M2 showed the highest developmental toxicity and thyroid disrupting effects,which significantly reducing hatching rates,increasing deformity rates,exhibiting the lowest lethal concentration 50 value and showing the most serious transcription inhibitory effects on the HPT axis.This study suggested the risk assessment of metabolites should be considered in assessing potential environmental risk of ethiprole.展开更多
This study investigates the relationships between exposures to ambient air pollution—specifically particulate matter 2.5 (PM_(2.5)) and its metabolites—and the risk of depression.Nonlinear and linear regression,Baye...This study investigates the relationships between exposures to ambient air pollution—specifically particulate matter 2.5 (PM_(2.5)) and its metabolites—and the risk of depression.Nonlinear and linear regression,Bayesian kernel machine regression,and toxicogenomic analysis were key approaches.PM_(2.5)exposure was positively associated with the risk of developing depression,whereas phenylglyoxylic acid exposure was negatively associated with depression risk.We found a significant overall relationship between ambient air pollution and depression,particularly at the 55th and 60th percentiles.Although statistical significance was not reached at the 65th percentile,there was a noticeable upward trend,indicating a potential association.Interestingly,no significant connection was found between a combination of metabolites from ambient air pollution and depression.PM_(2.5)and phenylglyoxylic acid emerged as the most influential compounds in the models,respectively.PM_(2.5)exposure altered the expression of 42 specific targets associated with depression,especially POMC,SCL6A4,IL6,and SOD2.The study identified specific pathways related to insulin secretion,energy metabolism,blood circulation,tube diameter,and maintenance of blood vessel diameter,as well as key molecular mechanisms involving hsa-miR-124-3p,hsa-miR-155-5p,hsa-miR-16-5p,and SP1.These mechanisms were found to underlie the etiology of depression associated with PM_(2.5)exposure.In conclusions,PM_(2.5)and phenylglyoxylic acid were found to be associated with depression.Further work is needed to gain insight into the molecular mechanisms by which these chemicals affect depression,especially pathways related to insulin secretion and blood circulation.展开更多
Background:The composition of the intestinal flora and the resulting metabolites af-fect patients'sleep after surgery.Methods:We intended to elucidate the mechanisms by which disordered intestinal flora modulate t...Background:The composition of the intestinal flora and the resulting metabolites af-fect patients'sleep after surgery.Methods:We intended to elucidate the mechanisms by which disordered intestinal flora modulate the pathophysiology of postoperative sleep disturbances in hosts.In this study,we explored the impacts of anesthesia,surgery,and postoperative sleep duration on the fecal microbiota and metabolites of individuals classified postpro-cedurally as poor sleepers(PS)and good sleepers(GS),as diagnosed by the bispec-tral index.We also performed fecal microbiota transplantation in pseudo-germ-free(PGF)rats and applied Western blotting,immunohistochemistry,and gut permeability analyses to identify the potential mechanism of its effect.Results:Research finding shows the PS group had significantly higher postopera-tive stool levels of the metabolites tryptophan and kynurenine than the GS group.PGF rats that received gut microbiota from PSs exhibited less rapid eye movement(REM)sleep than those that received GS microbiota(GS-PGF:11.4%±1.6%,PS-PGF:4.8%±2.0%,p<0.001).Measurement of 5-hydroxytryptophan(5-HTP)levels in the stool,serum,and prefrontal cortex(PFC)indicated that altered 5-HTP levels,includ-ing reduced levels in the PFC,caused sleep loss in PGF rats transplanted with PS gut flora.Through the brain-gut axis,the inactivity of tryptophan hydroxylase 1(TPH1)and TPH2 in the colon and PFC,respectively,caused a loss of REM sleep in PGF rats and decreased the 5-HTP level in the PFC.Conclusions:These findings indicate that postoperative gut dysbiosis and defective 5-HTP metabolism may cause postoperative sleep disturbances.Clinicians and sleep researchers may gain new insights from this study.展开更多
Inflammatory bowel disease(IBD)is a chronic gastrointestinal disease with a high incidence.Treatment for IBD includes medications and diet,and common anti-inflammatory medications have limitations like drug resistance...Inflammatory bowel disease(IBD)is a chronic gastrointestinal disease with a high incidence.Treatment for IBD includes medications and diet,and common anti-inflammatory medications have limitations like drug resistance and serious adverse effects.Accumulating evidence has demonstrated that dietary flavonoids exhibit an alleviative effect on IBD by influencing gut microbiota.The microbiota-derived metabolites also regulate IBD and maintain intestinal homeostasis.In this review,we investigate the therapeutic effect of gut microbiota and metabolites on IBD by intestinal immune and intestinal barrier function.We demonstrate the underlying mechanism of dietary flavonoids as an anti-inflammatory molecule alleviating IBD by regulating gut microbiota,short chain fatty acid(SCFA),bile acid(BA),tryptophan(Trp)metabolism and lipopolysaccharides(LPS)-toll-like receptor 4(TLR4)signaling pathway.Based on structural differences of flavonoids,we summarize the recent research progress on the role of different dietary flavonoids in alleviating IBD by gut microbiota and metabolites in animal and clinical trials.This review indicates that dietary flavonoids targeting gut microbiota and metabolites provide a promising strategy for the treatment of inflammation and novel insights into the management of IBD.展开更多
The review by Bangolo et al highlights the role of the gut microbiome in cancerassociated anemia(CAA).However,the impact of microbiome-derived metabolites is underexplored.In this letter,we focus on short-chain fatty ...The review by Bangolo et al highlights the role of the gut microbiome in cancerassociated anemia(CAA).However,the impact of microbiome-derived metabolites is underexplored.In this letter,we focus on short-chain fatty acids,tryptophan metabolites,and polyamines as key mediators linking dysbiosis to impaired erythropoiesis and iron homeostasis.We also propose a research framework that integrates multi-omics analysis and gnotobiotic models.Finally,we discuss the clinical potential of metabolite-based diagnostics and microbiome-targeted therapies in managing CAA.展开更多
Angelica L.has attracted global interest for its traditional medicinal uses and commercial values.However,few studies have focused on the metabolomic differences among the Angelica species.In this study,widely targete...Angelica L.has attracted global interest for its traditional medicinal uses and commercial values.However,few studies have focused on the metabolomic differences among the Angelica species.In this study,widely targeted metabolomics based on gas chromatography-tandem mass spectrometry was employed to analyze the metabolomes of four Angelica species(Angelicasinensis(Oliv.)Diels(A.sinensis),Angelica biserrata(R.H.Shan &Yuan)C.Q.Yuan & R.H.Shan(A.biserrata),Angelica dahurica(Hoffm.)Benth.& Hook.f.ex Franch.& Sav.(A.dahurica)and Angelica keiskei Koidz.(A.keiskei)).A total of 698 volatile metabolites were identified and classified into fifteen different categories.The metabo-lomic analysis indicated that 7-hydroxycoumarin and Z-ligustilide accumulated at significantly higher levels in A.sinensis,whereas bornyl acetate showed the opposite pattern.Furthermore,a high correspondence between the dendrogram of metabolite contents and phylogenetic positions of the four species.This study provides a comprehensive biochemical map for the exploitation,application and development of the Angelica species as medicinal plants or health-related dietary supplements.展开更多
Background:Fructose may induce non-alcoholic fatty acids(NAFLD)due to the gut-liver axis interactions.The mechanism of fructose impairing colon barrier is unrevealed.Methods:Normal and dextran sulfate sodium(DSS)-indu...Background:Fructose may induce non-alcoholic fatty acids(NAFLD)due to the gut-liver axis interactions.The mechanism of fructose impairing colon barrier is unrevealed.Methods:Normal and dextran sulfate sodium(DSS)-induced Sprague-Dawley rats fed by 35%fructose diets were used to evaluate colon barrier functions.Microbiome and metabolome were applied to screen potential biomarker bacteria and metabolites induced by fructose.HT-29 cells were applied to validate metabolite biomarker indoleacrylic acid(IAA)and indole-3-carboxaldehyde(I3A)function in colon barrier which impaired by fructose.Results:Fructose induced colon barrier dysfunction,aggravated colon impairment in DSS-induced rats.With fructose intake,the colon length shortened,goblet numbers declined,inflammation infiltration induced,inflammatory cytokines increased,and apoptosis signals upregulated in colon tissue.Moreover,fructose induced dysbiosis of microbiota and their metabolites.Adlercreutzia and Holdemania were screened out as potential bacteria biomarkers,IAA and I3A as tryptophan metabolites were selected as metabolite biomarkers inhibited by fructose.IAA and I3A treatment alleviated the impairment induced by fructose by increasing trans epithelial electric resistance value,tight junction proteins,and Aryl hydrocarbon receptor(Ah R)activity in HT-29 cell.Conclusion:Fructose stimulated inflammation,apoptosis,gut bacteria alteration,and induced the reduction of IAA and I3A.Since fructose inhibited production of IAA and I3A,Ah R remained inactivated and consequently induced colon barrier dysfunction.展开更多
Effect of ellagitannins gut microbiota metabolites ellagic acid(EA)and urolithin A-urolithin D(UroA-UroD)on human serum albumin(HSA)glycation were firstly evaluated in this research.The inhibition mechanisms were inve...Effect of ellagitannins gut microbiota metabolites ellagic acid(EA)and urolithin A-urolithin D(UroA-UroD)on human serum albumin(HSA)glycation were firstly evaluated in this research.The inhibition mechanisms were investigated by methylglyoxal(MGO)trapping and radical scavenging ability assays,docking studies and nano LC-orbitrap-MS/MS technology.Results indicated that the inhibition of urolithins on HSA glycation was highly positive correlated with the number of phenolic hydroxy groups.Addition of UroD and EA could effectively enhance the content of free amino group,suppress dicarbonyl compounds and advanced glycation end-products(AGEs)formation,alleviated tryptophan and protein oxidation,inhibited HSA amyloid-like aggregation.They could also trap MGO and scavenge 1,1-diphenyl-2-picrylhydrazyl free radical(DPPH·)and2,2'-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid free radical(ABTS^(+)·).Molecular docking indicated that EA and UroA-UroD interact with HSA mainly through hydrogen bound and hydrophobic interaction,among which 2 or 3 hydrogen bonds were formed.The number of glycation sites were reduced from 11 to10,10,7,and 10,respectively,when 90μmol/L of EA,UroA,UroC and UroD were added.However,weak inhibition was observed on UroA and UroB.These findings can provide scientific evidence for the application of ellagitannins-rich foods in alleviating diabetic complications.展开更多
This study was performed to investigate the changes in microbial communities and metabolites during the long-term fermentation of commercially manufactured anchovy sauce.Samples of commercial anchovy sauce were collec...This study was performed to investigate the changes in microbial communities and metabolites during the long-term fermentation of commercially manufactured anchovy sauce.Samples of commercial anchovy sauce were collected from large-scale fermentation tanks with fermentation periods of up to 7.87 years.The complex bacterial community was simplified to two genera,Tetragenococcus and Halanaerobium,after approximately 0.55 years of fermentation.Although genera,such as Saccharomyces,Cladosporium,Candida,and Aspergillus,were relatively dominant,no clear pattern was identified in fungal community analysis.The longitudinal metabolite profile demonstrated that approximately half(55.8%)of the metabolites present in anchovy sauce were produced within a year of fermentation due to rapid fermentation.Despite the static microbial community,the contents of several metabolites including amino acids and biogenic amines changed continuously during the long-term fermentation of anchovy sauce.This study provides novel insights into the changes in microbiota and metabolites in fish sauce produced without any starter inoculation.展开更多
Pyropia yezoensis(red algae)or commonly known as nori,is highly regarded for its nutritional benefits and distinct taste,leading to its widespread consumption.The bio-activity and sensory characteristics of P.yezoensi...Pyropia yezoensis(red algae)or commonly known as nori,is highly regarded for its nutritional benefits and distinct taste,leading to its widespread consumption.The bio-activity and sensory characteristics of P.yezoensis are attributed to the metabolites it contains.In this study,identification and quantification of the diverse range of metabolites of P.yezoensis and metabolomic analysis were conducted using gas chromatography-mass spectrometry(GC-MS).Furthermore,the impact of high temperature on its metabolites regulation was also investigated.Due to metabolomic analysis,a diverse range of metabolites were identified in P.yezoensis,including lipids,amino acids,carbohydrates,and secondary metabolites.Several known bioactive compounds,including alcohol and polyols,amines,amino acids-peptides-analogues,beta hydroxy acids and derivatives,carbohydrates and carbohydrate conjugates,cholestane steroids,dicarboxylic acid and derivatives,and fatty acids and conjugates were detected in abundance,highlighting the nutritional and functional properties of P.yezoensis.Additionally,the metabolites composition of P.yezoensis was significantly affected in high temperatures,which led to up-regulation of considerable primary metabolites and few were down-regulated,and suggested a potential response and adaptation mechanism of P.yezoensis to elevated temperature conditions.This research highlighted the metabolomics of P.yezoensis,provided insights into its metabolite composition and regulatory responses to high temperature conditions,enhanced our knowledge of the biochemical pathways and adaptive mechanisms of P.yezoensis,which can assist the improvement strategies of utilization and cultivation to promote this valuable alga in response to fluctuating environmental conditions.展开更多
[Objectives]To investigate the mechanism of endophytic fungi mediating the plant growth and promoting the accumulation of secondary metabolites in Camellia oleifera.[Methods]Four strains of endophytic fungi isolated f...[Objectives]To investigate the mechanism of endophytic fungi mediating the plant growth and promoting the accumulation of secondary metabolites in Camellia oleifera.[Methods]Four strains of endophytic fungi isolated from the rhizomes of C.oleifera were co-cultured with C.oleifera seedlings individually in sterile soil for 49 d:Didymella sp.(DS),Fusarium sp.(FS),Penicillium sp.(PS),and Clonostachys rosea(CR).[Results]The biological activities of the four fungal strains differed,but all exhibited the ability to promote quercetin accumulation while simultaneously reducing quercetin glycosides after co-culture with C.oleifera seedlings.The DS,FS and PS treatments resulted in a significant increase in the leaf area of C.oleifera,with all of the experimental groups exhibiting a weight increase of over 50%compared to the control(CON)group.[Conclusions]Our findings demonstrate the potential utility of endophytic fungi in the production of C.oleifera,highlighting their capacity to enhance both productivity and the accumulation of plant metabolites.展开更多
Obesity is associated with numerous metabolic disorders,and dietary polyphenols have been confirmed to have beneficial effects on the metabolism in obesity.However,the effect of 3-(3’,4’-dihydroxyphenyl)propanoic ac...Obesity is associated with numerous metabolic disorders,and dietary polyphenols have been confirmed to have beneficial effects on the metabolism in obesity.However,the effect of 3-(3’,4’-dihydroxyphenyl)propanoic acid(DHPA)and 3’,4’-dihydroxyphenylacetic acid(DHAA),two main metabolites of dietary polyphenols,on obesity remains poorly understood.In this study,DHPA and DHAA were found to alleviate obesity,as well as regulate insulin resistance,lipid metabolism,and oxidative stress response in high-fat diet(HFD)mice.Surprisingly,the 16S rRNA sequencing and UHPLC-Q-TOF/MS demonstrated that DHPA and DHAA only slightly disturbed the intestinal microbiome,but significantly altered the urine metabolome of HFD mice mainly by regulating pentose and glucuronate interconversion,tyrosine metabolism,pentose phosphate and tricarboxylic acid(TCA)cycle as indicated by metabolic pathway analysis based on Kyoto Encyclopedia of Genes and Genomes(KEGG)database.Correlation analysis revealed that the differential metabolites are strongly associated with body weight,blood glucose,insulin level,and superoxide dismutase(SOD)enzyme activity.Our results revealed that DHPA and DHAA exert their anti-obesity effect by regulating important metabolites in the glucose,lipid and tyrosine metabolism pathways.展开更多
Fungal phytochemicals derived from higher fungi,particularly those from the culinary-medicinal genus Hericium,have gained significant attention in drug discovery and healthcare.This review aims to provide a comprehens...Fungal phytochemicals derived from higher fungi,particularly those from the culinary-medicinal genus Hericium,have gained significant attention in drug discovery and healthcare.This review aims to provide a comprehensive analysis of the chemical structures,biosynthetic pathways,biological activities,and pharmacological properties of monomeric compounds isolated from Hericium species.Over the past 34 years,253 metabolites have been identified from various Hericium species,including cyathane diterpenes,alkaloids,benzofurans,chromenes,phenols,pyrones,steroids,and other miscellaneous compounds.Detailed investigations into the biosynthesis of erinacines,a type of cyathane diterpene,have led to the discovery of novel cyathane diterpenes.Extensive research has highlighted the biological activities and pharmacological properties of Hericium-derived compounds,with particular emphasis on their neuroprotective and neurotrophic effects,immunomodulatory capabilities,anti-cancer activity,antioxidant properties,and antimicrobial actions.Erinacine A,in particular,has been extensively studied.Genomic,transcriptomic,and proteomic analyses of Hericium species have facilitated the discovery of new compounds and provided insights into enzymatic reactions through genome mining.The diverse chemical structures and biological activities of Hericium compounds underpin their potential applications in medicine and as dietary supplements.This review not only advances our understanding of Hericium compounds but also encourages further research into Hericium species within the realms of medicine,health,functional foods,and agricultural microbiology.The broad spectrum of compound types and their diverse biological activities present promising opportunities for the development of new pharmaceuticals and edible products.展开更多
Inactivation of cyanobacterial cells and simultaneous control of secondary metabolites is of significant necessity for the treatment of cyanobacteria-laden water.Acetylacetone(AcAc)has been reported a specific algicid...Inactivation of cyanobacterial cells and simultaneous control of secondary metabolites is of significant necessity for the treatment of cyanobacteria-laden water.Acetylacetone(AcAc)has been reported a specific algicide to inactivate Microcystis aeruginosa(M.aeruginosa)and an effective light activator to degrade pollutants.This study systematically investigated the photodegradation ability of AcAc under xenon(Xe)irradiation on the secondary metabolites of M.aeruginosa,mainly algal organic matter(AOM),especially toxic microcystin-LR(MC-LR).Results showed that AcAc outperformed H_(2)O_(2)in destructing the protein-like substances,humic acid-like matters,aromatic proteins and fulvic-like substances of AOM.For MC-LR(250μg/L),0.05 mmol/L AcAc attained the same degradation efficiency(87.0%)as 0.1mmol/L H_(2)O_(2).The degradation mechanism of Xe/AcAc might involve photo-induced energy/electron transfer and formation of carbon center radicals.Alkaline conditions(pH>9.0)were detrimental to the photoactivity of AcAc,corresponding to the observed degradation rate constant(k_(1)value)of MC-LR drastically decreasing to 0.0013 min^(-1)as solution pH exceeded 9.0.The PO_(4)^(3-)and HCO_(3)^(-)ions had obvious inhibition effects,whereas NO_(3)^(-)slightly improved k_(1)value from 0.0277 min^(-1)to 0.0321 min^(-1).The presence of AOM did not significantly inhibit MC-LR degradation in Xe/AcAc system.In addition,the biological toxicity of MC-LR was greatly reduced after photoreaction.These results demonstrated that AcAc was an alternative algicidal agent to effectively inactivate algal cells and simultaneously control the secondary metabolites after cell lysis.Nevertheless,the concentration and irradiation conditions should be further optimized in practical application.展开更多
Plants serve as rich repositories of diverse chemical compounds collectively referred to as specialized metabolites.These compounds are of importance for adaptive processes,including interactions with various microbes...Plants serve as rich repositories of diverse chemical compounds collectively referred to as specialized metabolites.These compounds are of importance for adaptive processes,including interactions with various microbes both beneficial and harmful.Considering microbes as bioreactors,the chemical diversity undergoes dynamic changes when root-derived specialized metabolites(RSMs)and microbes encounter each other in the rhizosphere.Recent advancements in sequencing techniques and molecular biology tools have not only accelerated the elucidation of biosynthetic pathways of RSMs but also unveiled the significance of RSMs in plant-microbe interactions.In this review,we provide a comprehensive description of the effects of RSMs on microbe assembly in the rhizosphere and the influence of corresponding microbial changes on plant health,incorporating the most up-to-date information available.Additionally,we highlight open questions that remain for a deeper understanding of and harnessing the potential of RSM-microbe interactions to enhance plant adaptation to the environment.Finally,we propose a pipeline for investigating the intricate associations between root exometabolites and the rhizomicrobiome.展开更多
BACKGROUND Drug-induced liver injury(DILI)is one of the most common adverse events of medication use,and its incidence is increasing.However,early detection of DILI is a crucial challenge due to a lack of biomarkers a...BACKGROUND Drug-induced liver injury(DILI)is one of the most common adverse events of medication use,and its incidence is increasing.However,early detection of DILI is a crucial challenge due to a lack of biomarkers and noninvasive tests.AIM To identify salivary metabolic biomarkers of DILI for the future development of noninvasive diagnostic tools.METHODS Saliva samples from 31 DILI patients and 35 healthy controls(HCs)were subjected to untargeted metabolomics using ultrahigh-pressure liquid chromatography coupled with tandem mass spectrometry.Subsequent analyses,including partial least squares-discriminant analysis modeling,t tests and weighted metabolite coexpression network analysis(WMCNA),were conducted to identify key differentially expressed metabolites(DEMs)and metabolite sets.Furthermore we utilized least absolute shrinkage and selection operato and random fores analyses for biomarker prediction.The use of each metabolite and metabolite set to detect DILI was evaluated with area under the receiver operating characteristic curves.RESULTS We found 247 differentially expressed salivary metabolites between the DILI group and the HC group.Using WMCNA,we identified a set of 8 DEMs closely related to liver injury for further prediction testing.Interestingly,the distinct separation of DILI patients and HCs was achieved with five metabolites,namely,12-hydroxydodecanoic acid,3-hydroxydecanoic acid,tetradecanedioic acid,hypoxanthine,and inosine(area under the curve:0.733-1).CONCLUSION Salivary metabolomics revealed previously unreported metabolic alterations and diagnostic biomarkers in the saliva of DILI patients.Our study may provide a potentially feasible and noninvasive diagnostic method for DILI,but further validation is needed.展开更多
Endogenous metabolites play key functions in many important physiological and biochemical processes.The comprehensive in situ detection and direct imaging of metabolites in bio-tissues by matrix-assisted laser desorpt...Endogenous metabolites play key functions in many important physiological and biochemical processes.The comprehensive in situ detection and direct imaging of metabolites in bio-tissues by matrix-assisted laser desorption/ionization mass spectrometry imaging(MALDI-MSI)is very important for understanding complex and diverse biological processes and has become an essential aspect of spatial omics.In this work,4-aminoazobenzene(AAB)was successfully screened and optimized as a new negative ion(-)MALDI matrix to enhance the in situ detection and imaging of metabolites in tissues using MALDIMSI.Obviously,AAB exhibited superior properties in terms of ultraviolet absorption,background ion interference,matrix morphology,and metabolite ionization efficiency.AAB was used for in situ detection and imaging of metabolites in rat brain and germinating Chinese yew seed tissue sections,where 264and 339 metabolite ion signals were successfully detected and imaged using(-)MALDI-MS,respectively.In addition,high-resolution imaging of mouse eyeball section using MALDI-tims TOF MSI with spatial resolution of up to 10μm was successfully carried out,showing that AAB is an efficient(-)MALDI matrix for capturing high-resolution images of metabolites in biological tissue sections.展开更多
Background Necrotic enteritis(NE)is a major enteric disease in poultry,yet effective mitigation strategies remain elusive.Deoxycholic acid(DCA)and butyrate,two major metabolites derived from the intestinal microbiota,...Background Necrotic enteritis(NE)is a major enteric disease in poultry,yet effective mitigation strategies remain elusive.Deoxycholic acid(DCA)and butyrate,two major metabolites derived from the intestinal microbiota,have independently been shown to induce host defense peptide(HDP)synthesis.However,the potential synergy between these two compounds remains unexplored.Methods To investigate the possible synergistic effect between DCA and butyrate in regulating HDP synthesis and barrier function,we treated chicken HD11 macrophage cells and jejunal explants with DCA and sodium butyrate(NaB),either individually or in combination,for 24 h.Subsequently,we performed RNA isolation and reverse transcrip-tion-quantitative PCR to analyze HDP genes as well as the major genes associated with barrier function.To further determine the synergy between DCA and NaB in enhancing NE resistance,we conducted two independent trials with Cobb broiler chicks.In each trial,the diet was supplemented with DCA or NaB on the day-of-hatch,followed by NE induction through sequential challenges with Eimeria maxima and Clostridium perfringens on d 10 and 14,respectively.We recorded animal mortality after infection and assessed intestinal lesions on d 17.The impact of DCA and NaB on the microbiota in the ileum and cecum was evaluated through bacterial 16S rRNA gene sequencing.Results We found that the combination of DCA and NaB synergistically induced multiple HDP genes in both chicken HD11 cells and jejunal explants.Additionally,the gene for claudin-1,a major tight junction protein,also exhibited synergistic induction in response to DCA and NaB.Furthermore,dietary supplementation with a combination of 0.75 g/kg DCA and 1 g/kg NaB led to a significant improvement in animal survival and a reduction in intestinal lesions compared to either compound alone in a chicken model of NE.Notably,the cecal microbiota of NE-infected chickens showed a marked decrease in SCFA-producing bacteria such as Bacteroides,Faecalibacterium,and Cuneatibacter,with lactobacilli becoming the most dominant species.However,supplementation with DCA and NaB largely restored the intestinal microbiota to healthy levels.Conclusions DCA synergizes with NaB to induce HDP and claudin-1 expression and enhance NE resistance,with potential for further development as cost-effective antibiotic alternatives.展开更多
Metabolism encompasses a series of intricate biochemical processes that are vital for the sustenance of life in organisms.Metabolomics,an essential scientific discipline,is a field of study within the broader domain o...Metabolism encompasses a series of intricate biochemical processes that are vital for the sustenance of life in organisms.Metabolomics,an essential scientific discipline,is a field of study within the broader domain of systems biology that focuses on the comprehensive analysis of small molecules,known as metabolites including lipids,coenzymes,etc.,which are synthesized during metabolism.With the contin-uous development of metabolomics,the multiple biological functions of metabolites are constantly being discovered,encompassing signal transduction and enzyme stimulation,while concurrently exhibiting as-sociations with afflictions like cancer and diabetes.The comprehension of metabolite functionalities and their intricate interplay with disease conditions assumes paramount importance in both disease-focused research endeavors and the development of diagnostic tools.This scholarly exposition undertakes an ex-tensive review of recent advancements in the investigation of functional roles assumed by metabolites,with specific emphasis on metabolites in lipid synthesis,glucose metabolism and exogenous metabolites.展开更多
文摘To investigate the in vitro digestion and fermentation properties of soybean oligosaccharides(SBOS)extracted from defatted soybean meal,the changes in monosaccharide composition and molecular mass were analyzed.Subsequently,the effect of SBOS on microbial community structure and metabolites was studied by 16S rRNA gene sequencing and untargeted metabolomics based on liquid chromatography-mass spectrometry.Results showed that SBOS was not easily enzymolyzed during simulated digestion and could reach the large intestine through the digestive system.The significant decrease in the molecular mass of SBOS after in vitro fermentation indicated its utilization by the gut microbiota,which increased the contents of short-chain fatty acids and lactic acid,thereby reducing the pH of the fermentation broth.Moreover,the core community was found to consist of Blautia,Lactobacillaceae,and Pediococcus.SBOS up-regulated beneficial differential metabolites such as myo-inositol,lactose,and glucose,which were closely related to galactose,amino sugar,and nucleotide sugar metabolism.This study will provide a reference for exploring the relationship between the gut microbiota and the metabolites of SBOS,and provide a basis for the development and application of SBOS as an ingredient for functional products.
基金supported by the National Natural Science Foundation of China(Nos.42207320 and 22076214).
文摘Ethiprole is widely used as a second-generation phenyl pyrazole insecticide.Previous studies indicated that ethiprole exhibited thyroid toxicity while two main metabolites(ethiprole sulfone(M1)and ethiprole sulfide(M2))of ethiprole showed higher acute toxicity than ethiprole.Therefore,assessing the thyroid toxicity of its metabolites is crucial for safety assessment.In this study,the thyroid toxicity and underlying mechanisms of ethiprole and its metabolites were explored using in silico,in vitro,and in vivo assays,with the aim of conducting a comparative study on thyroid toxicity.Molecular docking analysis showed that ethiprole,M1 and M2 could bind with thyroid receptor isoforms and exhibited higher binding affinity compared to 3,3,5-triiodothyronine(T3).GH3 cell proliferation assays revealed that ethiprole,M1 and M2 all served as thyroid hormone antagonists to hinder the T3-induced cell proliferation.Using the zebrafish model,we further investigated that exposure to ethiprole,M1,and M2 disrupted thyroid hormone levels and the transcriptional expressions of hypothalamus-pituitary-thyroid(HPT)axis-related genes.Ethiprole induced thyroid disrupting effects by binding with the thyroid receptor beta,M1 mainly through binding with the corticotropin releasing factor receptor-1,and M2 exposure firstly inhibited the thyroid peroxidase enzyme activity.M2 showed the highest developmental toxicity and thyroid disrupting effects,which significantly reducing hatching rates,increasing deformity rates,exhibiting the lowest lethal concentration 50 value and showing the most serious transcription inhibitory effects on the HPT axis.This study suggested the risk assessment of metabolites should be considered in assessing potential environmental risk of ethiprole.
文摘This study investigates the relationships between exposures to ambient air pollution—specifically particulate matter 2.5 (PM_(2.5)) and its metabolites—and the risk of depression.Nonlinear and linear regression,Bayesian kernel machine regression,and toxicogenomic analysis were key approaches.PM_(2.5)exposure was positively associated with the risk of developing depression,whereas phenylglyoxylic acid exposure was negatively associated with depression risk.We found a significant overall relationship between ambient air pollution and depression,particularly at the 55th and 60th percentiles.Although statistical significance was not reached at the 65th percentile,there was a noticeable upward trend,indicating a potential association.Interestingly,no significant connection was found between a combination of metabolites from ambient air pollution and depression.PM_(2.5)and phenylglyoxylic acid emerged as the most influential compounds in the models,respectively.PM_(2.5)exposure altered the expression of 42 specific targets associated with depression,especially POMC,SCL6A4,IL6,and SOD2.The study identified specific pathways related to insulin secretion,energy metabolism,blood circulation,tube diameter,and maintenance of blood vessel diameter,as well as key molecular mechanisms involving hsa-miR-124-3p,hsa-miR-155-5p,hsa-miR-16-5p,and SP1.These mechanisms were found to underlie the etiology of depression associated with PM_(2.5)exposure.In conclusions,PM_(2.5)and phenylglyoxylic acid were found to be associated with depression.Further work is needed to gain insight into the molecular mechanisms by which these chemicals affect depression,especially pathways related to insulin secretion and blood circulation.
基金supported by a grant from the National Natural Science Foundation of China(82171187).
文摘Background:The composition of the intestinal flora and the resulting metabolites af-fect patients'sleep after surgery.Methods:We intended to elucidate the mechanisms by which disordered intestinal flora modulate the pathophysiology of postoperative sleep disturbances in hosts.In this study,we explored the impacts of anesthesia,surgery,and postoperative sleep duration on the fecal microbiota and metabolites of individuals classified postpro-cedurally as poor sleepers(PS)and good sleepers(GS),as diagnosed by the bispec-tral index.We also performed fecal microbiota transplantation in pseudo-germ-free(PGF)rats and applied Western blotting,immunohistochemistry,and gut permeability analyses to identify the potential mechanism of its effect.Results:Research finding shows the PS group had significantly higher postopera-tive stool levels of the metabolites tryptophan and kynurenine than the GS group.PGF rats that received gut microbiota from PSs exhibited less rapid eye movement(REM)sleep than those that received GS microbiota(GS-PGF:11.4%±1.6%,PS-PGF:4.8%±2.0%,p<0.001).Measurement of 5-hydroxytryptophan(5-HTP)levels in the stool,serum,and prefrontal cortex(PFC)indicated that altered 5-HTP levels,includ-ing reduced levels in the PFC,caused sleep loss in PGF rats transplanted with PS gut flora.Through the brain-gut axis,the inactivity of tryptophan hydroxylase 1(TPH1)and TPH2 in the colon and PFC,respectively,caused a loss of REM sleep in PGF rats and decreased the 5-HTP level in the PFC.Conclusions:These findings indicate that postoperative gut dysbiosis and defective 5-HTP metabolism may cause postoperative sleep disturbances.Clinicians and sleep researchers may gain new insights from this study.
基金supported by grants from the National Natural Science Foundation of China(31560459)Jiangxi Provincial Natural Science Foundation(20224ACB205014)The Double Thousands Talents Plan of Jiangxi(jxsq2018102075,jxsq2018102076)。
文摘Inflammatory bowel disease(IBD)is a chronic gastrointestinal disease with a high incidence.Treatment for IBD includes medications and diet,and common anti-inflammatory medications have limitations like drug resistance and serious adverse effects.Accumulating evidence has demonstrated that dietary flavonoids exhibit an alleviative effect on IBD by influencing gut microbiota.The microbiota-derived metabolites also regulate IBD and maintain intestinal homeostasis.In this review,we investigate the therapeutic effect of gut microbiota and metabolites on IBD by intestinal immune and intestinal barrier function.We demonstrate the underlying mechanism of dietary flavonoids as an anti-inflammatory molecule alleviating IBD by regulating gut microbiota,short chain fatty acid(SCFA),bile acid(BA),tryptophan(Trp)metabolism and lipopolysaccharides(LPS)-toll-like receptor 4(TLR4)signaling pathway.Based on structural differences of flavonoids,we summarize the recent research progress on the role of different dietary flavonoids in alleviating IBD by gut microbiota and metabolites in animal and clinical trials.This review indicates that dietary flavonoids targeting gut microbiota and metabolites provide a promising strategy for the treatment of inflammation and novel insights into the management of IBD.
文摘The review by Bangolo et al highlights the role of the gut microbiome in cancerassociated anemia(CAA).However,the impact of microbiome-derived metabolites is underexplored.In this letter,we focus on short-chain fatty acids,tryptophan metabolites,and polyamines as key mediators linking dysbiosis to impaired erythropoiesis and iron homeostasis.We also propose a research framework that integrates multi-omics analysis and gnotobiotic models.Finally,we discuss the clinical potential of metabolite-based diagnostics and microbiome-targeted therapies in managing CAA.
基金supported by the National Science Foundation of China,Grant 32470245.
文摘Angelica L.has attracted global interest for its traditional medicinal uses and commercial values.However,few studies have focused on the metabolomic differences among the Angelica species.In this study,widely targeted metabolomics based on gas chromatography-tandem mass spectrometry was employed to analyze the metabolomes of four Angelica species(Angelicasinensis(Oliv.)Diels(A.sinensis),Angelica biserrata(R.H.Shan &Yuan)C.Q.Yuan & R.H.Shan(A.biserrata),Angelica dahurica(Hoffm.)Benth.& Hook.f.ex Franch.& Sav.(A.dahurica)and Angelica keiskei Koidz.(A.keiskei)).A total of 698 volatile metabolites were identified and classified into fifteen different categories.The metabo-lomic analysis indicated that 7-hydroxycoumarin and Z-ligustilide accumulated at significantly higher levels in A.sinensis,whereas bornyl acetate showed the opposite pattern.Furthermore,a high correspondence between the dendrogram of metabolite contents and phylogenetic positions of the four species.This study provides a comprehensive biochemical map for the exploitation,application and development of the Angelica species as medicinal plants or health-related dietary supplements.
基金supported by the Special Funds of Basic Research of Central Public Welfare Institute(JY2010 and ZX2410)。
文摘Background:Fructose may induce non-alcoholic fatty acids(NAFLD)due to the gut-liver axis interactions.The mechanism of fructose impairing colon barrier is unrevealed.Methods:Normal and dextran sulfate sodium(DSS)-induced Sprague-Dawley rats fed by 35%fructose diets were used to evaluate colon barrier functions.Microbiome and metabolome were applied to screen potential biomarker bacteria and metabolites induced by fructose.HT-29 cells were applied to validate metabolite biomarker indoleacrylic acid(IAA)and indole-3-carboxaldehyde(I3A)function in colon barrier which impaired by fructose.Results:Fructose induced colon barrier dysfunction,aggravated colon impairment in DSS-induced rats.With fructose intake,the colon length shortened,goblet numbers declined,inflammation infiltration induced,inflammatory cytokines increased,and apoptosis signals upregulated in colon tissue.Moreover,fructose induced dysbiosis of microbiota and their metabolites.Adlercreutzia and Holdemania were screened out as potential bacteria biomarkers,IAA and I3A as tryptophan metabolites were selected as metabolite biomarkers inhibited by fructose.IAA and I3A treatment alleviated the impairment induced by fructose by increasing trans epithelial electric resistance value,tight junction proteins,and Aryl hydrocarbon receptor(Ah R)activity in HT-29 cell.Conclusion:Fructose stimulated inflammation,apoptosis,gut bacteria alteration,and induced the reduction of IAA and I3A.Since fructose inhibited production of IAA and I3A,Ah R remained inactivated and consequently induced colon barrier dysfunction.
基金supported by the Natural Science Foundation of Jiangxi Province(20212BAB205017,20192ACB21011)National Science and Technology Award Reserve Cultivation Program Project of Jiangxi(20212AEI91001)。
文摘Effect of ellagitannins gut microbiota metabolites ellagic acid(EA)and urolithin A-urolithin D(UroA-UroD)on human serum albumin(HSA)glycation were firstly evaluated in this research.The inhibition mechanisms were investigated by methylglyoxal(MGO)trapping and radical scavenging ability assays,docking studies and nano LC-orbitrap-MS/MS technology.Results indicated that the inhibition of urolithins on HSA glycation was highly positive correlated with the number of phenolic hydroxy groups.Addition of UroD and EA could effectively enhance the content of free amino group,suppress dicarbonyl compounds and advanced glycation end-products(AGEs)formation,alleviated tryptophan and protein oxidation,inhibited HSA amyloid-like aggregation.They could also trap MGO and scavenge 1,1-diphenyl-2-picrylhydrazyl free radical(DPPH·)and2,2'-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid free radical(ABTS^(+)·).Molecular docking indicated that EA and UroA-UroD interact with HSA mainly through hydrogen bound and hydrophobic interaction,among which 2 or 3 hydrogen bonds were formed.The number of glycation sites were reduced from 11 to10,10,7,and 10,respectively,when 90μmol/L of EA,UroA,UroC and UroD were added.However,weak inhibition was observed on UroA and UroB.These findings can provide scientific evidence for the application of ellagitannins-rich foods in alleviating diabetic complications.
基金supported by the National Research Foundation of Korea(NRF)(RS-2024-00333618 and RS-2023-00240999)a Korea University Grantthe Institute of Biomedical Science&Food Safety,CJ-Korea University Food Safety Hall at Korea University,Republic of Korea。
文摘This study was performed to investigate the changes in microbial communities and metabolites during the long-term fermentation of commercially manufactured anchovy sauce.Samples of commercial anchovy sauce were collected from large-scale fermentation tanks with fermentation periods of up to 7.87 years.The complex bacterial community was simplified to two genera,Tetragenococcus and Halanaerobium,after approximately 0.55 years of fermentation.Although genera,such as Saccharomyces,Cladosporium,Candida,and Aspergillus,were relatively dominant,no clear pattern was identified in fungal community analysis.The longitudinal metabolite profile demonstrated that approximately half(55.8%)of the metabolites present in anchovy sauce were produced within a year of fermentation due to rapid fermentation.Despite the static microbial community,the contents of several metabolites including amino acids and biogenic amines changed continuously during the long-term fermentation of anchovy sauce.This study provides novel insights into the changes in microbiota and metabolites in fish sauce produced without any starter inoculation.
基金Supported by the National Key R&D Program of China(No.2016 YFC 1402102)the National Natural Science Foundation of China(No.41976109)+1 种基金the Ministry of Natural Resources Key Laboratory of Eco-Environmental Science and Technology of China(No.MEEST-2020-2)the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)。
文摘Pyropia yezoensis(red algae)or commonly known as nori,is highly regarded for its nutritional benefits and distinct taste,leading to its widespread consumption.The bio-activity and sensory characteristics of P.yezoensis are attributed to the metabolites it contains.In this study,identification and quantification of the diverse range of metabolites of P.yezoensis and metabolomic analysis were conducted using gas chromatography-mass spectrometry(GC-MS).Furthermore,the impact of high temperature on its metabolites regulation was also investigated.Due to metabolomic analysis,a diverse range of metabolites were identified in P.yezoensis,including lipids,amino acids,carbohydrates,and secondary metabolites.Several known bioactive compounds,including alcohol and polyols,amines,amino acids-peptides-analogues,beta hydroxy acids and derivatives,carbohydrates and carbohydrate conjugates,cholestane steroids,dicarboxylic acid and derivatives,and fatty acids and conjugates were detected in abundance,highlighting the nutritional and functional properties of P.yezoensis.Additionally,the metabolites composition of P.yezoensis was significantly affected in high temperatures,which led to up-regulation of considerable primary metabolites and few were down-regulated,and suggested a potential response and adaptation mechanism of P.yezoensis to elevated temperature conditions.This research highlighted the metabolomics of P.yezoensis,provided insights into its metabolite composition and regulatory responses to high temperature conditions,enhanced our knowledge of the biochemical pathways and adaptive mechanisms of P.yezoensis,which can assist the improvement strategies of utilization and cultivation to promote this valuable alga in response to fluctuating environmental conditions.
基金Supported by the Key Field Project of Guizhou Provincial Education Department(KY[2021]044)Guizhou Forestry Science Research Project(QJH KY[2021]11)Guizhou Higher Education Characteristic Key Laboratory Construction Project(QJH KY[2021]002).
文摘[Objectives]To investigate the mechanism of endophytic fungi mediating the plant growth and promoting the accumulation of secondary metabolites in Camellia oleifera.[Methods]Four strains of endophytic fungi isolated from the rhizomes of C.oleifera were co-cultured with C.oleifera seedlings individually in sterile soil for 49 d:Didymella sp.(DS),Fusarium sp.(FS),Penicillium sp.(PS),and Clonostachys rosea(CR).[Results]The biological activities of the four fungal strains differed,but all exhibited the ability to promote quercetin accumulation while simultaneously reducing quercetin glycosides after co-culture with C.oleifera seedlings.The DS,FS and PS treatments resulted in a significant increase in the leaf area of C.oleifera,with all of the experimental groups exhibiting a weight increase of over 50%compared to the control(CON)group.[Conclusions]Our findings demonstrate the potential utility of endophytic fungi in the production of C.oleifera,highlighting their capacity to enhance both productivity and the accumulation of plant metabolites.
基金supported by the project of the National Natural Science Foundation of China(32272331)the project of Fundamental Research Funds for the Central Universities(2662019PY034)。
文摘Obesity is associated with numerous metabolic disorders,and dietary polyphenols have been confirmed to have beneficial effects on the metabolism in obesity.However,the effect of 3-(3’,4’-dihydroxyphenyl)propanoic acid(DHPA)and 3’,4’-dihydroxyphenylacetic acid(DHAA),two main metabolites of dietary polyphenols,on obesity remains poorly understood.In this study,DHPA and DHAA were found to alleviate obesity,as well as regulate insulin resistance,lipid metabolism,and oxidative stress response in high-fat diet(HFD)mice.Surprisingly,the 16S rRNA sequencing and UHPLC-Q-TOF/MS demonstrated that DHPA and DHAA only slightly disturbed the intestinal microbiome,but significantly altered the urine metabolome of HFD mice mainly by regulating pentose and glucuronate interconversion,tyrosine metabolism,pentose phosphate and tricarboxylic acid(TCA)cycle as indicated by metabolic pathway analysis based on Kyoto Encyclopedia of Genes and Genomes(KEGG)database.Correlation analysis revealed that the differential metabolites are strongly associated with body weight,blood glucose,insulin level,and superoxide dismutase(SOD)enzyme activity.Our results revealed that DHPA and DHAA exert their anti-obesity effect by regulating important metabolites in the glucose,lipid and tyrosine metabolism pathways.
基金supported by the National Natural Science Foundation of China (Nos.31800031,32370069,and U22A20369)the Key R&D Projects in Shaanxi Province of China (No.2023-YBSF-164)China Postdoctoral Science Foundation (No.2019M653760).
文摘Fungal phytochemicals derived from higher fungi,particularly those from the culinary-medicinal genus Hericium,have gained significant attention in drug discovery and healthcare.This review aims to provide a comprehensive analysis of the chemical structures,biosynthetic pathways,biological activities,and pharmacological properties of monomeric compounds isolated from Hericium species.Over the past 34 years,253 metabolites have been identified from various Hericium species,including cyathane diterpenes,alkaloids,benzofurans,chromenes,phenols,pyrones,steroids,and other miscellaneous compounds.Detailed investigations into the biosynthesis of erinacines,a type of cyathane diterpene,have led to the discovery of novel cyathane diterpenes.Extensive research has highlighted the biological activities and pharmacological properties of Hericium-derived compounds,with particular emphasis on their neuroprotective and neurotrophic effects,immunomodulatory capabilities,anti-cancer activity,antioxidant properties,and antimicrobial actions.Erinacine A,in particular,has been extensively studied.Genomic,transcriptomic,and proteomic analyses of Hericium species have facilitated the discovery of new compounds and provided insights into enzymatic reactions through genome mining.The diverse chemical structures and biological activities of Hericium compounds underpin their potential applications in medicine and as dietary supplements.This review not only advances our understanding of Hericium compounds but also encourages further research into Hericium species within the realms of medicine,health,functional foods,and agricultural microbiology.The broad spectrum of compound types and their diverse biological activities present promising opportunities for the development of new pharmaceuticals and edible products.
基金supported by the National Natural Science Foundation of China (No.21906085)the Natural Science Foundation of Jiangsu Province of China (No.BK20190547)the State Key Laboratory of Pollution Control and Resource Reuse Foundation (No.PCRRF21046)。
文摘Inactivation of cyanobacterial cells and simultaneous control of secondary metabolites is of significant necessity for the treatment of cyanobacteria-laden water.Acetylacetone(AcAc)has been reported a specific algicide to inactivate Microcystis aeruginosa(M.aeruginosa)and an effective light activator to degrade pollutants.This study systematically investigated the photodegradation ability of AcAc under xenon(Xe)irradiation on the secondary metabolites of M.aeruginosa,mainly algal organic matter(AOM),especially toxic microcystin-LR(MC-LR).Results showed that AcAc outperformed H_(2)O_(2)in destructing the protein-like substances,humic acid-like matters,aromatic proteins and fulvic-like substances of AOM.For MC-LR(250μg/L),0.05 mmol/L AcAc attained the same degradation efficiency(87.0%)as 0.1mmol/L H_(2)O_(2).The degradation mechanism of Xe/AcAc might involve photo-induced energy/electron transfer and formation of carbon center radicals.Alkaline conditions(pH>9.0)were detrimental to the photoactivity of AcAc,corresponding to the observed degradation rate constant(k_(1)value)of MC-LR drastically decreasing to 0.0013 min^(-1)as solution pH exceeded 9.0.The PO_(4)^(3-)and HCO_(3)^(-)ions had obvious inhibition effects,whereas NO_(3)^(-)slightly improved k_(1)value from 0.0277 min^(-1)to 0.0321 min^(-1).The presence of AOM did not significantly inhibit MC-LR degradation in Xe/AcAc system.In addition,the biological toxicity of MC-LR was greatly reduced after photoreaction.These results demonstrated that AcAc was an alternative algicidal agent to effectively inactivate algal cells and simultaneously control the secondary metabolites after cell lysis.Nevertheless,the concentration and irradiation conditions should be further optimized in practical application.
基金National Key Research and Development Program of China(2018YFA0900603 to G.W.and 2022YFF1001800 to Y.B.)the National Natural Science Foundation of China(grant No.32000232)to X.W.the State Key Laboratory of Plant Genomics of China(SKLPG2016A-13)to G.W.
文摘Plants serve as rich repositories of diverse chemical compounds collectively referred to as specialized metabolites.These compounds are of importance for adaptive processes,including interactions with various microbes both beneficial and harmful.Considering microbes as bioreactors,the chemical diversity undergoes dynamic changes when root-derived specialized metabolites(RSMs)and microbes encounter each other in the rhizosphere.Recent advancements in sequencing techniques and molecular biology tools have not only accelerated the elucidation of biosynthetic pathways of RSMs but also unveiled the significance of RSMs in plant-microbe interactions.In this review,we provide a comprehensive description of the effects of RSMs on microbe assembly in the rhizosphere and the influence of corresponding microbial changes on plant health,incorporating the most up-to-date information available.Additionally,we highlight open questions that remain for a deeper understanding of and harnessing the potential of RSM-microbe interactions to enhance plant adaptation to the environment.Finally,we propose a pipeline for investigating the intricate associations between root exometabolites and the rhizomicrobiome.
基金Supported by Medical Education Association Foundation of China,No.2020KTY001National Natural Science Foundation of China,No.81673806National Natural Science Foundation Youth Fund,No.82104702.
文摘BACKGROUND Drug-induced liver injury(DILI)is one of the most common adverse events of medication use,and its incidence is increasing.However,early detection of DILI is a crucial challenge due to a lack of biomarkers and noninvasive tests.AIM To identify salivary metabolic biomarkers of DILI for the future development of noninvasive diagnostic tools.METHODS Saliva samples from 31 DILI patients and 35 healthy controls(HCs)were subjected to untargeted metabolomics using ultrahigh-pressure liquid chromatography coupled with tandem mass spectrometry.Subsequent analyses,including partial least squares-discriminant analysis modeling,t tests and weighted metabolite coexpression network analysis(WMCNA),were conducted to identify key differentially expressed metabolites(DEMs)and metabolite sets.Furthermore we utilized least absolute shrinkage and selection operato and random fores analyses for biomarker prediction.The use of each metabolite and metabolite set to detect DILI was evaluated with area under the receiver operating characteristic curves.RESULTS We found 247 differentially expressed salivary metabolites between the DILI group and the HC group.Using WMCNA,we identified a set of 8 DEMs closely related to liver injury for further prediction testing.Interestingly,the distinct separation of DILI patients and HCs was achieved with five metabolites,namely,12-hydroxydodecanoic acid,3-hydroxydecanoic acid,tetradecanedioic acid,hypoxanthine,and inosine(area under the curve:0.733-1).CONCLUSION Salivary metabolomics revealed previously unreported metabolic alterations and diagnostic biomarkers in the saliva of DILI patients.Our study may provide a potentially feasible and noninvasive diagnostic method for DILI,but further validation is needed.
基金supported by the National Natural Science Foundation of China(Nos.31770384 and 21605164)the Youth Academic Team Project of MUC(No.10301-02200301)+1 种基金the Huayi Technology Innovation Center for Research Resources(No.HTIC P01RR2017001A)the Key Laboratory Construction Funds of State Ethnic Affairs Commission of China(No.10301-02200303)。
文摘Endogenous metabolites play key functions in many important physiological and biochemical processes.The comprehensive in situ detection and direct imaging of metabolites in bio-tissues by matrix-assisted laser desorption/ionization mass spectrometry imaging(MALDI-MSI)is very important for understanding complex and diverse biological processes and has become an essential aspect of spatial omics.In this work,4-aminoazobenzene(AAB)was successfully screened and optimized as a new negative ion(-)MALDI matrix to enhance the in situ detection and imaging of metabolites in tissues using MALDIMSI.Obviously,AAB exhibited superior properties in terms of ultraviolet absorption,background ion interference,matrix morphology,and metabolite ionization efficiency.AAB was used for in situ detection and imaging of metabolites in rat brain and germinating Chinese yew seed tissue sections,where 264and 339 metabolite ion signals were successfully detected and imaged using(-)MALDI-MS,respectively.In addition,high-resolution imaging of mouse eyeball section using MALDI-tims TOF MSI with spatial resolution of up to 10μm was successfully carried out,showing that AAB is an efficient(-)MALDI matrix for capturing high-resolution images of metabolites in biological tissue sections.
基金supported by the USDA National Institute of Food and Agriculture grants (2020-67016-31619 and 2023-67015-39095)the Ralph F. and Leila W. Boulware Endowment Fund+1 种基金Oklahoma Agricultural Experiment Station Project H-3112supported by a USDA National Institute of Food and Agriculture Predoctoral Fellowship grant (2021-67034-35184)
文摘Background Necrotic enteritis(NE)is a major enteric disease in poultry,yet effective mitigation strategies remain elusive.Deoxycholic acid(DCA)and butyrate,two major metabolites derived from the intestinal microbiota,have independently been shown to induce host defense peptide(HDP)synthesis.However,the potential synergy between these two compounds remains unexplored.Methods To investigate the possible synergistic effect between DCA and butyrate in regulating HDP synthesis and barrier function,we treated chicken HD11 macrophage cells and jejunal explants with DCA and sodium butyrate(NaB),either individually or in combination,for 24 h.Subsequently,we performed RNA isolation and reverse transcrip-tion-quantitative PCR to analyze HDP genes as well as the major genes associated with barrier function.To further determine the synergy between DCA and NaB in enhancing NE resistance,we conducted two independent trials with Cobb broiler chicks.In each trial,the diet was supplemented with DCA or NaB on the day-of-hatch,followed by NE induction through sequential challenges with Eimeria maxima and Clostridium perfringens on d 10 and 14,respectively.We recorded animal mortality after infection and assessed intestinal lesions on d 17.The impact of DCA and NaB on the microbiota in the ileum and cecum was evaluated through bacterial 16S rRNA gene sequencing.Results We found that the combination of DCA and NaB synergistically induced multiple HDP genes in both chicken HD11 cells and jejunal explants.Additionally,the gene for claudin-1,a major tight junction protein,also exhibited synergistic induction in response to DCA and NaB.Furthermore,dietary supplementation with a combination of 0.75 g/kg DCA and 1 g/kg NaB led to a significant improvement in animal survival and a reduction in intestinal lesions compared to either compound alone in a chicken model of NE.Notably,the cecal microbiota of NE-infected chickens showed a marked decrease in SCFA-producing bacteria such as Bacteroides,Faecalibacterium,and Cuneatibacter,with lactobacilli becoming the most dominant species.However,supplementation with DCA and NaB largely restored the intestinal microbiota to healthy levels.Conclusions DCA synergizes with NaB to induce HDP and claudin-1 expression and enhance NE resistance,with potential for further development as cost-effective antibiotic alternatives.
基金supported by the National Key R&D Program of China (No.2022YFC3401900)
文摘Metabolism encompasses a series of intricate biochemical processes that are vital for the sustenance of life in organisms.Metabolomics,an essential scientific discipline,is a field of study within the broader domain of systems biology that focuses on the comprehensive analysis of small molecules,known as metabolites including lipids,coenzymes,etc.,which are synthesized during metabolism.With the contin-uous development of metabolomics,the multiple biological functions of metabolites are constantly being discovered,encompassing signal transduction and enzyme stimulation,while concurrently exhibiting as-sociations with afflictions like cancer and diabetes.The comprehension of metabolite functionalities and their intricate interplay with disease conditions assumes paramount importance in both disease-focused research endeavors and the development of diagnostic tools.This scholarly exposition undertakes an ex-tensive review of recent advancements in the investigation of functional roles assumed by metabolites,with specific emphasis on metabolites in lipid synthesis,glucose metabolism and exogenous metabolites.
