Extensive evidence demonstrates that a healthy and well-balanced gut microbiota profoundly influences host nutrient absorption,immunity,and metabolism.Unlike mammals,early microbiota colonization in commercial poultry...Extensive evidence demonstrates that a healthy and well-balanced gut microbiota profoundly influences host nutrient absorption,immunity,and metabolism.Unlike mammals,early microbiota colonization in commercial poultry largely depends on the environment as chicks hatch in incubators under a relatively sterile environment(egg and incubator sterilization)without maternal-offspring interaction.The early gut microbiota remains unsaturated,providing a critical window for modulation and influencing the subsequent microbiota succession,which may have long-term health outcomes.Microbiota transplantation(MT)involves transferring the microbiota from a donor to a recipient to modulate the recipient’s microbiota toward a desired state.Successfully applied in human medicine,MT is also gaining attention in poultry production to modulate intestinal health.This review comprehensively explores factors affecting MT,its mechanisms,and its potential applications in chickens,providing insights for further research and commercial use.展开更多
Colorectal cancer(CRC)is increasingly recognized as a multifactorial disease influenced by hereditary,environmental,and microbial factors.This article explores recent insights into the role of gut microbiota dysbiosis...Colorectal cancer(CRC)is increasingly recognized as a multifactorial disease influenced by hereditary,environmental,and microbial factors.This article explores recent insights into the role of gut microbiota dysbiosis in CRC patho-genesis and progression.Key differences in microbial composition,characterized by enrichment of pro-carcinogenic species such as Fusobacterium nucleatum and Bacteroides fragilis and depletion of beneficial commensals like Faecalibacterium prausnitzii,have been identified alongside changes in microbial metabolites such as short-chain fatty acids and secondary bile acids.We discuss immune system modulation by the microbiota,formation of bacterial biofilms,and the activation of host pathways such as the urea cycle during tumorigenesis.Special attention is given to therapeutic innovations,including microbiota-informed precision modelling,synthetic biology-based engineered probiotics,and evolving altern-atives to fecal microbiota transplantation.These integrative strategies represent promising tools in the era of personalized oncology for CRC.展开更多
Alzheimer’s disease not only affects the brain,but also induces metabolic dysfunction in peripheral organs and alters the gut microbiota.The aim of this study was to investigate systemic changes that occur in Alzhei...Alzheimer’s disease not only affects the brain,but also induces metabolic dysfunction in peripheral organs and alters the gut microbiota.The aim of this study was to investigate systemic changes that occur in Alzheimer’s disease,in particular the association between changes in peripheral organ metabolism,changes in gut microbial composition,and Alzheimer’s disease development.To do this,we analyzed peripheral organ metabolism and the gut microbiota in amyloid precursor protein-presenilin 1(APP/PS1)transgenic and control mice at 3,6,9,and 12 months of age.Twelve-month-old APP/PS1 mice exhibited cognitive impairment,Alzheimer’s disease-related brain changes,distinctive metabolic disturbances in peripheral organs and fecal samples(as detected by untargeted metabolomics sequencing),and substantial changes in gut microbial composition compared with younger APP/PS1 mice.Notably,a strong correlation emerged between the gut microbiota and kidney metabolism in APP/PS1 mice.These findings suggest that alterations in peripheral organ metabolism and the gut microbiota are closely related to Alzheimer’s disease development,indicating potential new directions for therapeutic strategies.展开更多
This letter addresses the recently published manuscript by Darnindro et al,which investigates the diversity and composition of colonic mucosal microbiota in Indonesian patients with and without colorectal cancer(CRC)....This letter addresses the recently published manuscript by Darnindro et al,which investigates the diversity and composition of colonic mucosal microbiota in Indonesian patients with and without colorectal cancer(CRC).Although the analysis revealed no statistically significant differences in alpha diversity between the CRC and non-CRC groups,the authors identified notable distinctions in the composition and diversity of colonic mucosal microbiota among patients with CRC compared to those without.At the genus level,a statistically significant difference in microbiota composition was documented between the two cohorts.Specifically,the genera Bacteroides,Campylobacter,Peptostreptococcus,and Parvimonas were found to be elevated in individuals with CRC,while Faecalibacterium,Haemophilus,and Phocaeicola were more prevalent in the non-CRC group.展开更多
Intracerebral hemorrhage is the most dangerous subtype of stroke,characterized by high mortality and morbidity rates,and frequently leads to significant secondary white matter injury.In recent decades,studies have rev...Intracerebral hemorrhage is the most dangerous subtype of stroke,characterized by high mortality and morbidity rates,and frequently leads to significant secondary white matter injury.In recent decades,studies have revealed that gut microbiota can communicate bidirectionally with the brain through the gut microbiota–brain axis.This axis indicates that gut microbiota is closely related to the development and prognosis of intracerebral hemorrhage and its associated secondary white matter injury.The NACHT,LRR,and pyrin domain-containing protein 3(NLRP3)inflammasome plays a crucial role in this context.This review summarizes the dysbiosis of gut microbiota following intracerebral hemorrhage and explores the mechanisms by which this imbalance may promote the activation of the NLRP3 inflammasome.These mechanisms include metabolic pathways(involving short-chain fatty acids,lipopolysaccharides,lactic acid,bile acids,trimethylamine-N-oxide,and tryptophan),neural pathways(such as the vagus nerve and sympathetic nerve),and immune pathways(involving microglia and T cells).We then discuss the relationship between the activated NLRP3 inflammasome and secondary white matter injury after intracerebral hemorrhage.The activation of the NLRP3 inflammasome can exacerbate secondary white matter injury by disrupting the blood–brain barrier,inducing neuroinflammation,and interfering with nerve regeneration.Finally,we outline potential treatment strategies for intracerebral hemorrhage and its secondary white matter injury.Our review highlights the critical role of the gut microbiota–brain axis and the NLRP3 inflammasome in white matter injury following intracerebral hemorrhage,paving the way for exploring potential therapeutic approaches.展开更多
Inflammatory bowel disease,particularly Crohn's disease(CD),has been linked to modifications in mesenteric adipose tissue(MAT)and the phenomenon known as"creeping fat"(CrF).The presence of CrF is believe...Inflammatory bowel disease,particularly Crohn's disease(CD),has been linked to modifications in mesenteric adipose tissue(MAT)and the phenomenon known as"creeping fat"(CrF).The presence of CrF is believed to serve as a predictor for early clinical recurrence following surgical intervention in patients with CD.Notably,the incorporation of the mesentery during ileocolic resection for CD has been correlated with a decrease in surgical recurrence,indicating the significant role of MAT in the pathogenesis of CD.While numerous studies have indicated that dysbiosis of the gut microbiota is a critical factor in the development of CD,the functional implications of translocated microbiota within the MAT of CD patients remain ambiguous.This manuscript commentary discusses a recent basic research conducted by Wu et al.In their study,intestinal bacteria from individuals were transplanted into CD model mice,revealing that fecal microbiota trans-plantation(FMT)from healthy donors alleviated CD symptoms,whereas FMT from CD patients exacerbated these symptoms.Importantly,FMT was found to affect intestinal permeability,barrier function,and the levels of proinflammatory factors and adipokines.Collectively,these findings suggest that targeting MAT and CrF may hold therapeutic potential for patients with CD.However,the study did not evaluate the composition of the intestinal microbiota of the donors or the subsequent alterations in the gut microbiota.Overall,the gut microbiota plays a crucial role in the histopathology of CD,and thus,targeting MAT and CrF may represent a promising avenue for treatment in this patient population.展开更多
Microorganisms such as bacteria,fungi,viruses,parasites living in the human intestine constitute the human intestinal microbiota.Dysbiosis refers to composi-tional and quantitative changes that negatively affect healt...Microorganisms such as bacteria,fungi,viruses,parasites living in the human intestine constitute the human intestinal microbiota.Dysbiosis refers to composi-tional and quantitative changes that negatively affect healthy gut microbiota.In recent years,with the demonstration that many diseases are associated with dysbiosis,treatment strategies targeting the correction of dysbiosis in the treat-ment of these diseases have begun to be investigated.Faecal microbiota trans-plantation(FMT)is the process of transferring faeces from a healthy donor to another recipient in order to restore the gut microbiota and provide a therapeutic benefit.FMT studies have gained popularity after probiotic,prebiotic,symbiotic studies in the treatment of dysbiosis and related diseases.FMT has emerged as a potential new therapy in the treatment of allergic diseases as it is associated with the maintenance of intestinal microbiota and immunological balance(T helper 1/T helper 2 cells)and thus suppression of allergic responses.In this article,the definition,application,safety and use of FMT in allergic diseases will be discussed with current data.展开更多
Dyslipidemia,a complex disorder characterized by systemic lipid profile abnormalities,affects more than half of adults globally and constitutes a major modifiable risk factor for atherosclerotic cardiovascular disease...Dyslipidemia,a complex disorder characterized by systemic lipid profile abnormalities,affects more than half of adults globally and constitutes a major modifiable risk factor for atherosclerotic cardiovascular disease.Mounting evidence has established the gut microbiota(GM)as a pivotal metabolic modulator that is correlated with atherogenic lipid profiles through dietary biotransformation,immunometabolic regulation,and bioactive metabolite signaling.However,the host-microbe interactions that drive dyslipidemia pathogenesis involve complex gene-environment crosstalk spanning epigenetic modifications to circadian entrainment.Mechanistically,GM perturbations disrupt lipid homeostasis via lipopolysaccharide-triggered hepatic very low-density lipoprotein overproduction,short-chain fatty acid-G protein-coupled receptor 43/41-mediated adipocyte lipolysis,bile acid-farnesoid X receptor/Takeda G proteincoupled receptor 5 axis dysfunction altering cholesterol flux,microbialβ-oxidation intermediates impairing mitochondrial energetics,and host-microbiota noncoding RNA crosstalk regulating lipogenic genes.This comprehensive review systematically examines three critical dimensions,including bidirectional GMlipid axis interactions,molecular cascades bridging microbial ecology to metabolic dysfunction,and translational applications of GM modulation through precision probiotics,structure-specific prebiotics,and a metabolically optimized fecal microbiota transplantation protocol.Notwithstanding these advances,critical gaps persist in establishing causal microbial taxa-pathway relationships and optimal intervention timing.Future directions require longitudinal multi-omic studies,gnotobiotic models for mechanistic validation,and machine learning-driven personalized microbiota profiling.This synthesis provides a framework for developing microbiotacentric strategies targeting dyslipidemia pathophysiology,with implications for precision dyslipidemia management and next-generation cardiovascular disease prevention.展开更多
BACKGROUND Hypobaric hypoxia exposure(HHE)often causes neuropsychiatric disorders.Due to its complex mechanism,efficient strategies for alleviating HHE-induced anxiety-and depression-like behaviors remain limited.AIM ...BACKGROUND Hypobaric hypoxia exposure(HHE)often causes neuropsychiatric disorders.Due to its complex mechanism,efficient strategies for alleviating HHE-induced anxiety-and depression-like behaviors remain limited.AIM To characterize alterations in the oral and gut microbiota following HHE and to explore a potential microbiota-based intervention to mitigate associated psychiatric symptoms.METHODS C57BL/6J mice were exposed to simulated high-altitude hypoxia(5000 m)for 1,3,5,or 7 days.Behavioral assessments,including the open field test,elevated plus maze,and forced swim test,were conducted to evaluate anxiety-and depressionlike behaviors.Oral and fecal microbiota were analyzed using 16S rRNA sequencing to assess changes in microbial composition and diversity.Immunofluorescence staining was performed to examine c-Fos expression in brain nuclei.A probiotic formulation containing Lactobacillus rhamnosus(L.rhamnosus)DSM17648,Lactobacillus acidophilus DDS-1,and L.rhamnosus UALR-06 was administered to mice subjected to one day of HHE(HH1)to evaluate its therapeutic efficacy.RESULTS Behavioral tests revealed that HHE caused anxiety-and depression-like behaviors,which were most pronounced after 1 day of exposure.The IF data revealed significantly increased expression of c-Fos in various brain nuclei after HHE,including the anterior cingulate cortex,paraventricular thalamic nucleus,lateral habenula nucleus,paraventricular hypothalamic nucleus,lateral hypothalamus,and periaqueductal gray.The 16S rRNA sequencing results demonstrated a sharp decline in the abundance of Lactobacillus in the oral microbiota of mice exposed to HH1 and a marked decrease in the abundance of Lactobacillus and Bifidobacterium in the fecal microbiota of mice exposed to three days of HHE.Finally,oral administration and gavage of Lactobacillus significantly alleviated anxiety-and depression-like behaviors in HH1 mice.CONCLUSION HHE caused significant variations in the oral and fecal microbiota of mice.Lactobacillus supplementation alleviated anxiety-and depression-like behaviors in mice.Improving oral flora may relieve HHE-induced psychiatric disorders.展开更多
The significance of gut microbiota(GM)in human health is being increasingly researched.An imbalance in GM composition,known as dysbiosis,is linked to various and other health issues.In addition,antibiotics are the pri...The significance of gut microbiota(GM)in human health is being increasingly researched.An imbalance in GM composition,known as dysbiosis,is linked to various and other health issues.In addition,antibiotics are the primary and most significant factors leading to major changes in the composition and function of the GM,which may result in colonization by antimicrobial-resistant(AMR)pathogens.Therefore,alternative antibiotic strategies for combating AMR pathogens are urgently needed.This narrative review highlights current knowledge regarding various pertinent strategies for decolonizing bacterial pathogens from GM and emphasizes decolonization therapies’critical role in pediatric surgical disorders.Strategies such as decontamination of the digestive tract utilizing antibiotics,the use of probiotics,and particularly fecal microbiota transplantation have introduced new options for clinical treatment.These treatments show the potential to restore GM balance and have demonstrated advantages for intestinal disorders related to pediatric surgery,including inflammatory bowel disease,neonatal necrotizing enterocolitis,Hirschsprung-associated enterocolitis,and short bowel syndrome.Despite GM therapeutics,recent strategies are still in their developmental phase and exhibit challenges that need further research.Thus,potential future directions for GMtargeted decolonization therapies are under consideration.Innovative alternative strategies to combat AMR though GM modulation in disorders related to pediatric surgery appear to be promising and should continue to be prioritized for further research and development.展开更多
Crohn’s disease(CD)is an idiopathic,chronic,and recurrent inflammatory condition of the gastrointestinal tract.Recent studies suggest a potential role of gut microbiota in CD,particularly dysbiosis—an imbalance in g...Crohn’s disease(CD)is an idiopathic,chronic,and recurrent inflammatory condition of the gastrointestinal tract.Recent studies suggest a potential role of gut microbiota in CD,particularly dysbiosis—an imbalance in gut bacteria.While dysbiosis is consistently observed in CD,it remains uncertain whether it is a cause or a consequence of the disease.Given its association with CD,the therapeutic potential of fecal microbiota transplantation(FMT)has been explored.This review examines the role of gut microbiota in CD,evaluates the therapeutic potential of probiotics and FMT,and highlights current research findings and limitations.Key studies on the relationship between gut dysbiosis,probiotics,and FMT in CD were analyzed,with a focus on randomized trials,meta-analyses,and clinical observations.Dysbiosis is a consistent feature of CD,but its causative role remains unclear.Probiotics,prebiotics,and synbiotics have shown no efficacy in inducing or maintaining remission in CD.FMT shows potential as a therapeutic option for CD,but its efficacy remains inconsistent and inconclusive.The variability in outcomes,including diminished effects over time despite repeated FMT,underscores the need for larger,well-controlled trials.Only one randomized controlled trial(RCT)has compared FMT with sham transplantation,but the sample size was very small.Other studies are limited by factors such as small sample sizes,lack of control groups,short follow-up periods,and inconsistent methodologies,making it challenging to draw definitive conclusions.While gut dysbiosis likely plays a role in CD pathogenesis,its causative role remains uncertain.Current evidence does not support FMT as a reliable treatment for inducing or maintaining remission in CD,though it appears generally safe.Larger,standardized,RCTs are necessary to clarify the therapeutic role of FMT in CD management.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
Background Subacute rumen acidosis(SARA)is a common metabolic disorder in ruminants that disrupts the rumen microbiome and animal health,but diagnosis is challenging due to subtle symptoms and invasive testing require...Background Subacute rumen acidosis(SARA)is a common metabolic disorder in ruminants that disrupts the rumen microbiome and animal health,but diagnosis is challenging due to subtle symptoms and invasive testing require-ments.This study explores the potential of the buccal(oral)microbiome as a diagnostic indicator for SARA,hypoth-esizing an interaction with the rumen microbiome.Results The study involved 47 dairy goats,including 11 on a control diet and 36 on high-concentrate diets with increasing rumen-degradable starch.Animals were grouped based on dietary exposure and ruminal pH:Control,Low-RDS Tolerance/SARA(LRDST/LRDSS),and High-RDS Tolerance/SARA(HRDST/HRDSS).Transcriptomics of rumen epithelium showed heightened inflammatory pathway gene expression in SARA-susceptible goats compared to controls and tolerant groups.Alpha diversity of ruminal bacteria showed lower Shannon diversity in HRDSS goats compared to HRDST whereas buccal bacteria displayed significantly lower Chao1 diversity in LRDSS goats compared to HRDST.Beta diversity analyses revealed distinct patterns between SARA-affected goats and healthy controls in both ruminal and buccal microbiomes.Prevotellaceae_UCG-003 emerged as a candidate biomarker,with reduced abundance in SARA-susceptible goats in both rumen and buccal samples.Machine learning classifiers achieved high accuracy in distinguishing SARA-susceptible goats using this genus(rumen AUC=0.807;buccal AUC=0.779).Source tracking analysis illustrated diminished cross-population of bacteria from the buccal to rumen(2.86%to 0.25%)and vice versa(8.59%to 1.17%),signifying compromised microbial interchange in SARA-affected goats.A microbiota transplant experiment verified SARA microbiota’s ability to induce pH decline,escalate inflammation-related gene expression(MAPK10,IL17B,FOSB,SPP1),disrupt microbial transfer,and reduce Prevotellaceae_UCG-003 in recipients.Conclusion Our findings highlight SARA’s dual impact on ruminal and buccal microbiota,exacerbating epithelial inflammation gene expression.Shifts in the buccal microbiome,specifically reductions in Prevotellaceae_UCG-003,mirror ruminal changes and can be influenced by inter-compartmental bacterial transmission,thereby offering a non-invasive diagnostic approach for SARA.展开更多
BACKGROUND With advances in sequencing techniques,microbiota dysbiosis and pathogenic microbes that accelerate colorectal cancer progression have been identified and widely reported.However,few studies have focused on...BACKGROUND With advances in sequencing techniques,microbiota dysbiosis and pathogenic microbes that accelerate colorectal cancer progression have been identified and widely reported.However,few studies have focused on the microbiota taxa of rectal mucus in rectal cancer(RC)patients.Here,we analyzed the composition and characteristics of the rectal mucosa microbiota of RC patients from Wenzhou city,China,and compared the results with those of healthy controls.AIM To explore the changes in the characteristics of the rectal mucosal flora associated with RC,and identify biomarkers of microbe taxa for RC.METHODS Rectal mucosa samples from a Chinese cohort of 72 recently diagnosed RC patients and 71 healthy controls were obtained.A validation cohort,which included 22 RC patients and 60 healthy controls,was also established.Changes in the rectal mucosal flora were observed by cultivation,16S ribosomal DNA gene sequencing analysis and quantitative polymerase chain reaction analysis.RESULTS The 16S ribosomal DNA results demonstrated that RC patients presented increased bacterial community richness and alpha diversity as well as an altered rectal mucosal microbiota,with depletion of Proteobacteria and Thermi and enrichment of Bacteroidetes and Fusobacteria in cancerous mucosal tissues(CM)and enrichment of Firmicutes and Cyanobacteria in adjacent noncancerous mucosal tissues(AM).The culture results showed that the mean loads of Escherichia coli,Bifidobacterium,Enterococcus,and Lactobacillus were significantly reduced in RC patients.The ratios of Prevotella to Ruminococcus[areas under the receiver operating curve:0.795 in AM vs normal control mucosa(NM),0.77 in CM vs NM]and of Prevotella stercorea to Propionibacterium acnes(areas under the receiver operating curve:0.808 in AM vs NM,0.843 in CM vs NM)exhibited excellent abilities to differentiate between healthy controls and RC patients.CONCLUSION RC patients have an altered rectal mucosal microbiota,and the ratio of Prevotella to Ruminococcus or the ratio of Prevotella stercorea to Propionibacterium acnes may serve as a marker for RC diagnosis.展开更多
Objective:To establish a progressive research strategy for“colonic components analysis-efficacy verification and mechanism exploration-gut microbiota”,screen pharmacodynamic substances,and investigate their mechanis...Objective:To establish a progressive research strategy for“colonic components analysis-efficacy verification and mechanism exploration-gut microbiota”,screen pharmacodynamic substances,and investigate their mechanism via gut microbiota.Methods:The pharmacodynamics of Gegen Qinlian decoction(GQD)were assessed using a mouse model of dextran sulfate sodium-induced ulcerative colitis(UC).Ultra-performance liquid chromatographyquadrupole-orbitrap mass spectrometer was used to identify the prototype and metabolic components of GQD in the colon during UC.To analyze the structure and function of characteristic genera of GQD and its active components,16S rRNA sequencing was performed.Results:We identified 67 prototypic and 14 metabolic components of GQD in the UC colon.The primary prototype components are flavonoids and alkaloids,including puerarin(PUE),baicalin(BAI),and berberine(BER).The metabolism was predominantly sulfonation.Efficacy verification showed that the main active components,puerarin,baicalin,and berberine,had good therapeutic effects on UC.The results of 16S rRNA gene sequencing showed that GQD improved UC by regulating the structure and function of the gut microbiota.The abundance of gut microbiota involved in the metabolism of the prototype componentswas influenced by the corresponding components.The function prediction results showed that PUE was the most comparable to GQD,with 24 consistent pathways.BAI and BER showed comparable gut microbiota regulation pathways.Characteristic pathways of BER include glucometabolic processes.Conclusion:This study focused on the key issues in the gut microbiota pathway and developed a progressive research strategy to understand the transformation mechanisms of colonic components.This research systematically analyzed the active components and metabolic transformation of GQD in the colon during the pathological state of UC,as well as changes in the structure and function of the gut microbiota,clarified the mechanism of GQD and its active components in improving UC via the gut microbiota pathway.展开更多
Geniposide,the principal active iridoid glucoside ingredient in Fructus gardeniae used in numerous traditional Chinese clinical prescriptions,has been shown to cause herbal hepatotoxicity because of its glycone metabo...Geniposide,the principal active iridoid glucoside ingredient in Fructus gardeniae used in numerous traditional Chinese clinical prescriptions,has been shown to cause herbal hepatotoxicity because of its glycone metabolite genipin.This study explored the role of gut microbiota in alleviating geniposide hepatotoxicity with isoflavones in soy products.Metabolic profiling using ultra high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry(UHPLC-Q/TOF-MS)revealed two metabolic pathways and six main forms of geniposides in vivo.Enzyme inhibitor experiments have shown that isoflavones alter geniposide metabolism by mediating specific enzymes,includingβ-glucosidase(β-GC)and sulfotransferase(SULT),in an established pseudo-sterile rat model.Isoflavones pretreatment by gavage for three weeks optimized the structure of the gut microbiota was linked to the regulation of key metabolic enzymes.Furthermore,experiments involving fecal microbiota transplantation(FMT)established the direct contribution of the gut microbiota to the regulation of enzyme activities and geniposide metabolism.This study demonstrated that isoflavones in soy products regulated the metabolic enzymes of geniposode dependent on gut microbiota,especially Lactobacillus spp.,which was further verified in our clinical trials analyzed using 16S ribosomal RNA(rRNA)and metagenomic sequencing,thus regulating geniposide metabolism.Furthermore,as dominant beneficial bacterium,Lactobacillus spp.were discovered to be promising microbial targets for the better management of geniposide hepatotoxicity.These findings provide valuable insights for the prevention and intervention of drug-induced liver injury.展开更多
Blueberry anthocyanins(VA)and blackberry anthocyanins(RA)showed benefits on metabolic syndrome(MS)induced by high-fat diet(HFD)in mice.In this study,we investigated whether the therapeutic effects of VA and RA were ac...Blueberry anthocyanins(VA)and blackberry anthocyanins(RA)showed benefits on metabolic syndrome(MS)induced by high-fat diet(HFD)in mice.In this study,we investigated whether the therapeutic effects of VA and RA were achieved by the gut microbiota regulation and whether these effects could be replicated through fecal microbiota transplantation(FMT)using the HFD caused MS model in pseudo-germ-free mice.The results demonstrated that the beneficial effects of VA and RA on MS,including reducing body weight gain and fat accumulation,improving glucose and lipid metabolism,and mitigating intestinal barrier damage,were attributed to the gut microbiota and could be replicated by FMT.16S r RNA sequencing analysis suggested that FMT from donor mice supplemented with VA and RA could regulate the gut microbiota composition.Particularly,FMT from RA supplemented mice displayed the potential to restore the diversity of gut microbiota and the ratio of Firmicutes to Bacteroidetes.Meanwhile,FMT from VA supplemented mice appeared to exert its effects by selectively influencing specific gut microbiota,such as the genus Akkermansia.Furthermore,our analysis identified 10 common differential amplicon sequence variants(ASVs)among groups compared to HFD-HFD group.Notably,ASV_36450 was negatively associated with metabolic parameters,suggesting that Lactobacillus might be the potential bacteria in regulating MS.Overall,our study demonstrated that FMT from VA and RA supplemented mice could ameliorate MS induced by HFD in mice through regulating specific gut microbiota.展开更多
Non-alcoholic fatty liver disease(NAFLD),also referred to as metabolic-associated fatty liver disease,is among the most prevalent chronic liver conditions.In some cases,NAFLD may lead to liver inflammation and non-alc...Non-alcoholic fatty liver disease(NAFLD),also referred to as metabolic-associated fatty liver disease,is among the most prevalent chronic liver conditions.In some cases,NAFLD may lead to liver inflammation and non-alcoholic steatohepatitis,which can eventually progress to liver cirrhosis and hepatocellular carcinoma.The pathophysiology of NAFLD is complex,involving both genetic and environmental factors.NAFLD is a multisystem disease linked to a higher likelihood of developing metabolic disorders such as type 2 diabetes,obesity,and cardiovascular and chronic kidney diseases.The gut-liver axis represents a key connection between the gut microbiota and the liver,and its disruption has been linked to NAFLD.Growing evidence underscores the significant role of gut microbiota in the onset and progression of NAFLD,with alterations in the gut microbiome and impaired gut barrier function.Studies have identified key microbiota signatures and metabolites linked to NAFLD,implicating oxidative stress,endotoxemia,and inflammatory pathways that further strengthen the connection between gut microbiota and NAFLD.Modulation of gut microbiota through diet and microbiota-centered therapies,such as next-generation probiotics and fecal microbiota transplantation,holds promise for treating NAFLD.In this review,we explore the key link between gut microbiota and the development and progression of NAFLD,as well as its potential applications in the diagnosis and treatment of the disease.展开更多
Chronic liver disease has become a global health crisis,with increasing incidence and mortality rates placing a substantial burden on healthcare systems worldwide.A key factor in the progression of chronic liver disea...Chronic liver disease has become a global health crisis,with increasing incidence and mortality rates placing a substantial burden on healthcare systems worldwide.A key factor in the progression of chronic liver disease is intestinal microbiota dysbiosis,which influences liver function via the intricate liver-gut axis.This axis plays a central role in various physiological processes,and disruptions in microbial composition can exacerbate liver pathology.Fecal microbiota transplantation(FMT)has emerged as a promising therapeutic strategy,with the potential to restore the composition and metabolic functions of the intestinal microbiota.Supported by encouraging findings from clinical trials and animal studies,FMT has demonstrated therapeutic benefits,including improvements in clinical symptoms,objective indicators,and long-term prognosis.These benefits encompass reductions in hepatic lipid deposition and inflammation,mitigation of complications in advanced liver disease,promotion of hepatitis B e antigen seroconversion,and enhancement of cognitive function.Although clinical evidence remains preliminary,current data underscore the transformative potential of FMT in managing chronic liver diseases.Nonetheless,challenges persist,including the need for standardized procedures,variability among donors,potential risks,and concerns regarding long-term safety.This review provides a comprehensive evaluation of the current literature on the efficacy and safety of FMT,while exploring future research directions to expand its application in liver disease management.展开更多
Iron deficiency anemia(IDA)is a nutritional deficiency disease with a high incidence rate worldwide.Bioactive peptides are safe and effective,have multiple functions and can serve as potential candidates for alleviati...Iron deficiency anemia(IDA)is a nutritional deficiency disease with a high incidence rate worldwide.Bioactive peptides are safe and effective,have multiple functions and can serve as potential candidates for alleviating IDA.In this study,the anti-anemia effects of tuna dark muscle peptides were explored in a dietinduced IDA mouse model.The results showed that tuna dark muscle peptides alleviated the IDA phenotype,oxidative stress and iron metabolism.In addition,tuna dark muscle peptides reversed gut microbiota dysbiosis in IDA mice.Furthermore,the transplanted fecal microbiota from tuna dark muscle peptide-treated mice also alleviated IDA symptoms and regulated iron metabolism and the gut microbiota,indicating that the antianemic effects were at least partially mediated by the gut microbiota.Thus,we identified a new and safe prebiotic material to alleviate IDA and provided ideas for the development of peptides.At the same time,these data also provided a theoretical basis for fecal microbiota transplantation to alleviate IDA.展开更多
基金Haoran Zhao would like to acknowledge the support provided by China Scholarship Council(CSC)of the Ministry of Education,P.R.China(CSC No.202206850006)supported by funding from VLAIO with project number(HBC.2023.0172),HEPPY Markers-Establishment of biomarkers of Health and Eubiosis in Pigs and Poultry.
文摘Extensive evidence demonstrates that a healthy and well-balanced gut microbiota profoundly influences host nutrient absorption,immunity,and metabolism.Unlike mammals,early microbiota colonization in commercial poultry largely depends on the environment as chicks hatch in incubators under a relatively sterile environment(egg and incubator sterilization)without maternal-offspring interaction.The early gut microbiota remains unsaturated,providing a critical window for modulation and influencing the subsequent microbiota succession,which may have long-term health outcomes.Microbiota transplantation(MT)involves transferring the microbiota from a donor to a recipient to modulate the recipient’s microbiota toward a desired state.Successfully applied in human medicine,MT is also gaining attention in poultry production to modulate intestinal health.This review comprehensively explores factors affecting MT,its mechanisms,and its potential applications in chickens,providing insights for further research and commercial use.
文摘Colorectal cancer(CRC)is increasingly recognized as a multifactorial disease influenced by hereditary,environmental,and microbial factors.This article explores recent insights into the role of gut microbiota dysbiosis in CRC patho-genesis and progression.Key differences in microbial composition,characterized by enrichment of pro-carcinogenic species such as Fusobacterium nucleatum and Bacteroides fragilis and depletion of beneficial commensals like Faecalibacterium prausnitzii,have been identified alongside changes in microbial metabolites such as short-chain fatty acids and secondary bile acids.We discuss immune system modulation by the microbiota,formation of bacterial biofilms,and the activation of host pathways such as the urea cycle during tumorigenesis.Special attention is given to therapeutic innovations,including microbiota-informed precision modelling,synthetic biology-based engineered probiotics,and evolving altern-atives to fecal microbiota transplantation.These integrative strategies represent promising tools in the era of personalized oncology for CRC.
基金financially supported by the National Natural Science Foundation of China,No.823 74552 (to WP)the Science and Technology Innovation Program of Hunan Province,No.2022RC1220 (to WP)+1 种基金the Natural Science Foundation of Hunan Province of China,Nos.2020JJ4803 (to WP),2022JJ40723 (to MY)the Scientific Research Launch Project for New Employees of the Second Xiangya Hospital of Central South University (to MY)
文摘Alzheimer’s disease not only affects the brain,but also induces metabolic dysfunction in peripheral organs and alters the gut microbiota.The aim of this study was to investigate systemic changes that occur in Alzheimer’s disease,in particular the association between changes in peripheral organ metabolism,changes in gut microbial composition,and Alzheimer’s disease development.To do this,we analyzed peripheral organ metabolism and the gut microbiota in amyloid precursor protein-presenilin 1(APP/PS1)transgenic and control mice at 3,6,9,and 12 months of age.Twelve-month-old APP/PS1 mice exhibited cognitive impairment,Alzheimer’s disease-related brain changes,distinctive metabolic disturbances in peripheral organs and fecal samples(as detected by untargeted metabolomics sequencing),and substantial changes in gut microbial composition compared with younger APP/PS1 mice.Notably,a strong correlation emerged between the gut microbiota and kidney metabolism in APP/PS1 mice.These findings suggest that alterations in peripheral organ metabolism and the gut microbiota are closely related to Alzheimer’s disease development,indicating potential new directions for therapeutic strategies.
基金Supported by Research Project of the Chinese Digestive Early Cancer Physicians'Joint Growth Program,No.GTCZ-2021-AH-34-0012.
文摘This letter addresses the recently published manuscript by Darnindro et al,which investigates the diversity and composition of colonic mucosal microbiota in Indonesian patients with and without colorectal cancer(CRC).Although the analysis revealed no statistically significant differences in alpha diversity between the CRC and non-CRC groups,the authors identified notable distinctions in the composition and diversity of colonic mucosal microbiota among patients with CRC compared to those without.At the genus level,a statistically significant difference in microbiota composition was documented between the two cohorts.Specifically,the genera Bacteroides,Campylobacter,Peptostreptococcus,and Parvimonas were found to be elevated in individuals with CRC,while Faecalibacterium,Haemophilus,and Phocaeicola were more prevalent in the non-CRC group.
基金supported by the Guangdong Basic and Applied Basic Research Foundation,No.2023A1515030045(to HS)Presidential Foundation of Zhujiang Hospital of Southern Medical University,No.yzjj2022ms4(to HS)。
文摘Intracerebral hemorrhage is the most dangerous subtype of stroke,characterized by high mortality and morbidity rates,and frequently leads to significant secondary white matter injury.In recent decades,studies have revealed that gut microbiota can communicate bidirectionally with the brain through the gut microbiota–brain axis.This axis indicates that gut microbiota is closely related to the development and prognosis of intracerebral hemorrhage and its associated secondary white matter injury.The NACHT,LRR,and pyrin domain-containing protein 3(NLRP3)inflammasome plays a crucial role in this context.This review summarizes the dysbiosis of gut microbiota following intracerebral hemorrhage and explores the mechanisms by which this imbalance may promote the activation of the NLRP3 inflammasome.These mechanisms include metabolic pathways(involving short-chain fatty acids,lipopolysaccharides,lactic acid,bile acids,trimethylamine-N-oxide,and tryptophan),neural pathways(such as the vagus nerve and sympathetic nerve),and immune pathways(involving microglia and T cells).We then discuss the relationship between the activated NLRP3 inflammasome and secondary white matter injury after intracerebral hemorrhage.The activation of the NLRP3 inflammasome can exacerbate secondary white matter injury by disrupting the blood–brain barrier,inducing neuroinflammation,and interfering with nerve regeneration.Finally,we outline potential treatment strategies for intracerebral hemorrhage and its secondary white matter injury.Our review highlights the critical role of the gut microbiota–brain axis and the NLRP3 inflammasome in white matter injury following intracerebral hemorrhage,paving the way for exploring potential therapeutic approaches.
文摘Inflammatory bowel disease,particularly Crohn's disease(CD),has been linked to modifications in mesenteric adipose tissue(MAT)and the phenomenon known as"creeping fat"(CrF).The presence of CrF is believed to serve as a predictor for early clinical recurrence following surgical intervention in patients with CD.Notably,the incorporation of the mesentery during ileocolic resection for CD has been correlated with a decrease in surgical recurrence,indicating the significant role of MAT in the pathogenesis of CD.While numerous studies have indicated that dysbiosis of the gut microbiota is a critical factor in the development of CD,the functional implications of translocated microbiota within the MAT of CD patients remain ambiguous.This manuscript commentary discusses a recent basic research conducted by Wu et al.In their study,intestinal bacteria from individuals were transplanted into CD model mice,revealing that fecal microbiota trans-plantation(FMT)from healthy donors alleviated CD symptoms,whereas FMT from CD patients exacerbated these symptoms.Importantly,FMT was found to affect intestinal permeability,barrier function,and the levels of proinflammatory factors and adipokines.Collectively,these findings suggest that targeting MAT and CrF may hold therapeutic potential for patients with CD.However,the study did not evaluate the composition of the intestinal microbiota of the donors or the subsequent alterations in the gut microbiota.Overall,the gut microbiota plays a crucial role in the histopathology of CD,and thus,targeting MAT and CrF may represent a promising avenue for treatment in this patient population.
文摘Microorganisms such as bacteria,fungi,viruses,parasites living in the human intestine constitute the human intestinal microbiota.Dysbiosis refers to composi-tional and quantitative changes that negatively affect healthy gut microbiota.In recent years,with the demonstration that many diseases are associated with dysbiosis,treatment strategies targeting the correction of dysbiosis in the treat-ment of these diseases have begun to be investigated.Faecal microbiota trans-plantation(FMT)is the process of transferring faeces from a healthy donor to another recipient in order to restore the gut microbiota and provide a therapeutic benefit.FMT studies have gained popularity after probiotic,prebiotic,symbiotic studies in the treatment of dysbiosis and related diseases.FMT has emerged as a potential new therapy in the treatment of allergic diseases as it is associated with the maintenance of intestinal microbiota and immunological balance(T helper 1/T helper 2 cells)and thus suppression of allergic responses.In this article,the definition,application,safety and use of FMT in allergic diseases will be discussed with current data.
基金by Guangdong Basic and Applied Basic Research Foundation,No.2023A1515012394.
文摘BACKGROUND Hypobaric hypoxia exposure(HHE)often causes neuropsychiatric disorders.Due to its complex mechanism,efficient strategies for alleviating HHE-induced anxiety-and depression-like behaviors remain limited.AIM To characterize alterations in the oral and gut microbiota following HHE and to explore a potential microbiota-based intervention to mitigate associated psychiatric symptoms.METHODS C57BL/6J mice were exposed to simulated high-altitude hypoxia(5000 m)for 1,3,5,or 7 days.Behavioral assessments,including the open field test,elevated plus maze,and forced swim test,were conducted to evaluate anxiety-and depressionlike behaviors.Oral and fecal microbiota were analyzed using 16S rRNA sequencing to assess changes in microbial composition and diversity.Immunofluorescence staining was performed to examine c-Fos expression in brain nuclei.A probiotic formulation containing Lactobacillus rhamnosus(L.rhamnosus)DSM17648,Lactobacillus acidophilus DDS-1,and L.rhamnosus UALR-06 was administered to mice subjected to one day of HHE(HH1)to evaluate its therapeutic efficacy.RESULTS Behavioral tests revealed that HHE caused anxiety-and depression-like behaviors,which were most pronounced after 1 day of exposure.The IF data revealed significantly increased expression of c-Fos in various brain nuclei after HHE,including the anterior cingulate cortex,paraventricular thalamic nucleus,lateral habenula nucleus,paraventricular hypothalamic nucleus,lateral hypothalamus,and periaqueductal gray.The 16S rRNA sequencing results demonstrated a sharp decline in the abundance of Lactobacillus in the oral microbiota of mice exposed to HH1 and a marked decrease in the abundance of Lactobacillus and Bifidobacterium in the fecal microbiota of mice exposed to three days of HHE.Finally,oral administration and gavage of Lactobacillus significantly alleviated anxiety-and depression-like behaviors in HH1 mice.CONCLUSION HHE caused significant variations in the oral and fecal microbiota of mice.Lactobacillus supplementation alleviated anxiety-and depression-like behaviors in mice.Improving oral flora may relieve HHE-induced psychiatric disorders.
文摘The significance of gut microbiota(GM)in human health is being increasingly researched.An imbalance in GM composition,known as dysbiosis,is linked to various and other health issues.In addition,antibiotics are the primary and most significant factors leading to major changes in the composition and function of the GM,which may result in colonization by antimicrobial-resistant(AMR)pathogens.Therefore,alternative antibiotic strategies for combating AMR pathogens are urgently needed.This narrative review highlights current knowledge regarding various pertinent strategies for decolonizing bacterial pathogens from GM and emphasizes decolonization therapies’critical role in pediatric surgical disorders.Strategies such as decontamination of the digestive tract utilizing antibiotics,the use of probiotics,and particularly fecal microbiota transplantation have introduced new options for clinical treatment.These treatments show the potential to restore GM balance and have demonstrated advantages for intestinal disorders related to pediatric surgery,including inflammatory bowel disease,neonatal necrotizing enterocolitis,Hirschsprung-associated enterocolitis,and short bowel syndrome.Despite GM therapeutics,recent strategies are still in their developmental phase and exhibit challenges that need further research.Thus,potential future directions for GMtargeted decolonization therapies are under consideration.Innovative alternative strategies to combat AMR though GM modulation in disorders related to pediatric surgery appear to be promising and should continue to be prioritized for further research and development.
文摘Crohn’s disease(CD)is an idiopathic,chronic,and recurrent inflammatory condition of the gastrointestinal tract.Recent studies suggest a potential role of gut microbiota in CD,particularly dysbiosis—an imbalance in gut bacteria.While dysbiosis is consistently observed in CD,it remains uncertain whether it is a cause or a consequence of the disease.Given its association with CD,the therapeutic potential of fecal microbiota transplantation(FMT)has been explored.This review examines the role of gut microbiota in CD,evaluates the therapeutic potential of probiotics and FMT,and highlights current research findings and limitations.Key studies on the relationship between gut dysbiosis,probiotics,and FMT in CD were analyzed,with a focus on randomized trials,meta-analyses,and clinical observations.Dysbiosis is a consistent feature of CD,but its causative role remains unclear.Probiotics,prebiotics,and synbiotics have shown no efficacy in inducing or maintaining remission in CD.FMT shows potential as a therapeutic option for CD,but its efficacy remains inconsistent and inconclusive.The variability in outcomes,including diminished effects over time despite repeated FMT,underscores the need for larger,well-controlled trials.Only one randomized controlled trial(RCT)has compared FMT with sham transplantation,but the sample size was very small.Other studies are limited by factors such as small sample sizes,lack of control groups,short follow-up periods,and inconsistent methodologies,making it challenging to draw definitive conclusions.While gut dysbiosis likely plays a role in CD pathogenesis,its causative role remains uncertain.Current evidence does not support FMT as a reliable treatment for inducing or maintaining remission in CD,though it appears generally safe.Larger,standardized,RCTs are necessary to clarify the therapeutic role of FMT in CD management.
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 the National Key Research and Development Program for International Science and Technology Innovation Cooperation between Governments(2023YFE0111800)the Shaanxi Province’s San Qin Talent Attraction Program for Regional Youth Talents.
文摘Background Subacute rumen acidosis(SARA)is a common metabolic disorder in ruminants that disrupts the rumen microbiome and animal health,but diagnosis is challenging due to subtle symptoms and invasive testing require-ments.This study explores the potential of the buccal(oral)microbiome as a diagnostic indicator for SARA,hypoth-esizing an interaction with the rumen microbiome.Results The study involved 47 dairy goats,including 11 on a control diet and 36 on high-concentrate diets with increasing rumen-degradable starch.Animals were grouped based on dietary exposure and ruminal pH:Control,Low-RDS Tolerance/SARA(LRDST/LRDSS),and High-RDS Tolerance/SARA(HRDST/HRDSS).Transcriptomics of rumen epithelium showed heightened inflammatory pathway gene expression in SARA-susceptible goats compared to controls and tolerant groups.Alpha diversity of ruminal bacteria showed lower Shannon diversity in HRDSS goats compared to HRDST whereas buccal bacteria displayed significantly lower Chao1 diversity in LRDSS goats compared to HRDST.Beta diversity analyses revealed distinct patterns between SARA-affected goats and healthy controls in both ruminal and buccal microbiomes.Prevotellaceae_UCG-003 emerged as a candidate biomarker,with reduced abundance in SARA-susceptible goats in both rumen and buccal samples.Machine learning classifiers achieved high accuracy in distinguishing SARA-susceptible goats using this genus(rumen AUC=0.807;buccal AUC=0.779).Source tracking analysis illustrated diminished cross-population of bacteria from the buccal to rumen(2.86%to 0.25%)and vice versa(8.59%to 1.17%),signifying compromised microbial interchange in SARA-affected goats.A microbiota transplant experiment verified SARA microbiota’s ability to induce pH decline,escalate inflammation-related gene expression(MAPK10,IL17B,FOSB,SPP1),disrupt microbial transfer,and reduce Prevotellaceae_UCG-003 in recipients.Conclusion Our findings highlight SARA’s dual impact on ruminal and buccal microbiota,exacerbating epithelial inflammation gene expression.Shifts in the buccal microbiome,specifically reductions in Prevotellaceae_UCG-003,mirror ruminal changes and can be influenced by inter-compartmental bacterial transmission,thereby offering a non-invasive diagnostic approach for SARA.
基金Supported by the Medical and Health Research Project of Zhejiang Province,No.2023KY998.
文摘BACKGROUND With advances in sequencing techniques,microbiota dysbiosis and pathogenic microbes that accelerate colorectal cancer progression have been identified and widely reported.However,few studies have focused on the microbiota taxa of rectal mucus in rectal cancer(RC)patients.Here,we analyzed the composition and characteristics of the rectal mucosa microbiota of RC patients from Wenzhou city,China,and compared the results with those of healthy controls.AIM To explore the changes in the characteristics of the rectal mucosal flora associated with RC,and identify biomarkers of microbe taxa for RC.METHODS Rectal mucosa samples from a Chinese cohort of 72 recently diagnosed RC patients and 71 healthy controls were obtained.A validation cohort,which included 22 RC patients and 60 healthy controls,was also established.Changes in the rectal mucosal flora were observed by cultivation,16S ribosomal DNA gene sequencing analysis and quantitative polymerase chain reaction analysis.RESULTS The 16S ribosomal DNA results demonstrated that RC patients presented increased bacterial community richness and alpha diversity as well as an altered rectal mucosal microbiota,with depletion of Proteobacteria and Thermi and enrichment of Bacteroidetes and Fusobacteria in cancerous mucosal tissues(CM)and enrichment of Firmicutes and Cyanobacteria in adjacent noncancerous mucosal tissues(AM).The culture results showed that the mean loads of Escherichia coli,Bifidobacterium,Enterococcus,and Lactobacillus were significantly reduced in RC patients.The ratios of Prevotella to Ruminococcus[areas under the receiver operating curve:0.795 in AM vs normal control mucosa(NM),0.77 in CM vs NM]and of Prevotella stercorea to Propionibacterium acnes(areas under the receiver operating curve:0.808 in AM vs NM,0.843 in CM vs NM)exhibited excellent abilities to differentiate between healthy controls and RC patients.CONCLUSION RC patients have an altered rectal mucosal microbiota,and the ratio of Prevotella to Ruminococcus or the ratio of Prevotella stercorea to Propionibacterium acnes may serve as a marker for RC diagnosis.
基金supported by Fundamental Research Funds for the Central Universities(2022-ZXFZJJ-028).
文摘Objective:To establish a progressive research strategy for“colonic components analysis-efficacy verification and mechanism exploration-gut microbiota”,screen pharmacodynamic substances,and investigate their mechanism via gut microbiota.Methods:The pharmacodynamics of Gegen Qinlian decoction(GQD)were assessed using a mouse model of dextran sulfate sodium-induced ulcerative colitis(UC).Ultra-performance liquid chromatographyquadrupole-orbitrap mass spectrometer was used to identify the prototype and metabolic components of GQD in the colon during UC.To analyze the structure and function of characteristic genera of GQD and its active components,16S rRNA sequencing was performed.Results:We identified 67 prototypic and 14 metabolic components of GQD in the UC colon.The primary prototype components are flavonoids and alkaloids,including puerarin(PUE),baicalin(BAI),and berberine(BER).The metabolism was predominantly sulfonation.Efficacy verification showed that the main active components,puerarin,baicalin,and berberine,had good therapeutic effects on UC.The results of 16S rRNA gene sequencing showed that GQD improved UC by regulating the structure and function of the gut microbiota.The abundance of gut microbiota involved in the metabolism of the prototype componentswas influenced by the corresponding components.The function prediction results showed that PUE was the most comparable to GQD,with 24 consistent pathways.BAI and BER showed comparable gut microbiota regulation pathways.Characteristic pathways of BER include glucometabolic processes.Conclusion:This study focused on the key issues in the gut microbiota pathway and developed a progressive research strategy to understand the transformation mechanisms of colonic components.This research systematically analyzed the active components and metabolic transformation of GQD in the colon during the pathological state of UC,as well as changes in the structure and function of the gut microbiota,clarified the mechanism of GQD and its active components in improving UC via the gut microbiota pathway.
基金supported by the National Natural Science Foundation of China(82461160264,82474056,and 82104124)the grant from the Noncommunicable Chronic Diseases-National Science and Technology Major Project(2023ZD0502605)+2 种基金the Science and Technology Development Fund,Macao SAR(FDCT 0025/2021/A1)the Shanghai Municipal Health Commission(2022XD037)the Shanghai Magnolia Talent Plan Pujiang Project(23PJD113)。
文摘Geniposide,the principal active iridoid glucoside ingredient in Fructus gardeniae used in numerous traditional Chinese clinical prescriptions,has been shown to cause herbal hepatotoxicity because of its glycone metabolite genipin.This study explored the role of gut microbiota in alleviating geniposide hepatotoxicity with isoflavones in soy products.Metabolic profiling using ultra high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry(UHPLC-Q/TOF-MS)revealed two metabolic pathways and six main forms of geniposides in vivo.Enzyme inhibitor experiments have shown that isoflavones alter geniposide metabolism by mediating specific enzymes,includingβ-glucosidase(β-GC)and sulfotransferase(SULT),in an established pseudo-sterile rat model.Isoflavones pretreatment by gavage for three weeks optimized the structure of the gut microbiota was linked to the regulation of key metabolic enzymes.Furthermore,experiments involving fecal microbiota transplantation(FMT)established the direct contribution of the gut microbiota to the regulation of enzyme activities and geniposide metabolism.This study demonstrated that isoflavones in soy products regulated the metabolic enzymes of geniposode dependent on gut microbiota,especially Lactobacillus spp.,which was further verified in our clinical trials analyzed using 16S ribosomal RNA(rRNA)and metagenomic sequencing,thus regulating geniposide metabolism.Furthermore,as dominant beneficial bacterium,Lactobacillus spp.were discovered to be promising microbial targets for the better management of geniposide hepatotoxicity.These findings provide valuable insights for the prevention and intervention of drug-induced liver injury.
基金financially supported by grants from the National Natural Science Foundation of China(32170377,81973463)the Primary Research&Development Plan of Jiangsu Province(BE2020344,BE2022371)。
文摘Blueberry anthocyanins(VA)and blackberry anthocyanins(RA)showed benefits on metabolic syndrome(MS)induced by high-fat diet(HFD)in mice.In this study,we investigated whether the therapeutic effects of VA and RA were achieved by the gut microbiota regulation and whether these effects could be replicated through fecal microbiota transplantation(FMT)using the HFD caused MS model in pseudo-germ-free mice.The results demonstrated that the beneficial effects of VA and RA on MS,including reducing body weight gain and fat accumulation,improving glucose and lipid metabolism,and mitigating intestinal barrier damage,were attributed to the gut microbiota and could be replicated by FMT.16S r RNA sequencing analysis suggested that FMT from donor mice supplemented with VA and RA could regulate the gut microbiota composition.Particularly,FMT from RA supplemented mice displayed the potential to restore the diversity of gut microbiota and the ratio of Firmicutes to Bacteroidetes.Meanwhile,FMT from VA supplemented mice appeared to exert its effects by selectively influencing specific gut microbiota,such as the genus Akkermansia.Furthermore,our analysis identified 10 common differential amplicon sequence variants(ASVs)among groups compared to HFD-HFD group.Notably,ASV_36450 was negatively associated with metabolic parameters,suggesting that Lactobacillus might be the potential bacteria in regulating MS.Overall,our study demonstrated that FMT from VA and RA supplemented mice could ameliorate MS induced by HFD in mice through regulating specific gut microbiota.
文摘Non-alcoholic fatty liver disease(NAFLD),also referred to as metabolic-associated fatty liver disease,is among the most prevalent chronic liver conditions.In some cases,NAFLD may lead to liver inflammation and non-alcoholic steatohepatitis,which can eventually progress to liver cirrhosis and hepatocellular carcinoma.The pathophysiology of NAFLD is complex,involving both genetic and environmental factors.NAFLD is a multisystem disease linked to a higher likelihood of developing metabolic disorders such as type 2 diabetes,obesity,and cardiovascular and chronic kidney diseases.The gut-liver axis represents a key connection between the gut microbiota and the liver,and its disruption has been linked to NAFLD.Growing evidence underscores the significant role of gut microbiota in the onset and progression of NAFLD,with alterations in the gut microbiome and impaired gut barrier function.Studies have identified key microbiota signatures and metabolites linked to NAFLD,implicating oxidative stress,endotoxemia,and inflammatory pathways that further strengthen the connection between gut microbiota and NAFLD.Modulation of gut microbiota through diet and microbiota-centered therapies,such as next-generation probiotics and fecal microbiota transplantation,holds promise for treating NAFLD.In this review,we explore the key link between gut microbiota and the development and progression of NAFLD,as well as its potential applications in the diagnosis and treatment of the disease.
基金Supported by National Key R&D Program of China,No.2022YFC2304505 and No.2021YFC2301801the Beijing Municipal of Science and Technology Major Project,No.Z221100007422002+1 种基金the Capital Funds for Health Improvement and Research,No.CFH-2024-1-2181Beijing Igandan Foundation,No.iGandanF-1082023-GSH011.
文摘Chronic liver disease has become a global health crisis,with increasing incidence and mortality rates placing a substantial burden on healthcare systems worldwide.A key factor in the progression of chronic liver disease is intestinal microbiota dysbiosis,which influences liver function via the intricate liver-gut axis.This axis plays a central role in various physiological processes,and disruptions in microbial composition can exacerbate liver pathology.Fecal microbiota transplantation(FMT)has emerged as a promising therapeutic strategy,with the potential to restore the composition and metabolic functions of the intestinal microbiota.Supported by encouraging findings from clinical trials and animal studies,FMT has demonstrated therapeutic benefits,including improvements in clinical symptoms,objective indicators,and long-term prognosis.These benefits encompass reductions in hepatic lipid deposition and inflammation,mitigation of complications in advanced liver disease,promotion of hepatitis B e antigen seroconversion,and enhancement of cognitive function.Although clinical evidence remains preliminary,current data underscore the transformative potential of FMT in managing chronic liver diseases.Nonetheless,challenges persist,including the need for standardized procedures,variability among donors,potential risks,and concerns regarding long-term safety.This review provides a comprehensive evaluation of the current literature on the efficacy and safety of FMT,while exploring future research directions to expand its application in liver disease management.
基金sponsored by the Natural Science Foundation of Zhejiang Province(LQ22D060002 and LTGC23C190001)Fund of State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products(ZS20190105)+1 种基金General Project of Zhejiang Provincial Department of Education(Y202146257)K.C.Wong Magna Fund of Ningbo University。
文摘Iron deficiency anemia(IDA)is a nutritional deficiency disease with a high incidence rate worldwide.Bioactive peptides are safe and effective,have multiple functions and can serve as potential candidates for alleviating IDA.In this study,the anti-anemia effects of tuna dark muscle peptides were explored in a dietinduced IDA mouse model.The results showed that tuna dark muscle peptides alleviated the IDA phenotype,oxidative stress and iron metabolism.In addition,tuna dark muscle peptides reversed gut microbiota dysbiosis in IDA mice.Furthermore,the transplanted fecal microbiota from tuna dark muscle peptide-treated mice also alleviated IDA symptoms and regulated iron metabolism and the gut microbiota,indicating that the antianemic effects were at least partially mediated by the gut microbiota.Thus,we identified a new and safe prebiotic material to alleviate IDA and provided ideas for the development of peptides.At the same time,these data also provided a theoretical basis for fecal microbiota transplantation to alleviate IDA.
