Postbiotics from Saccharomyces cerevisiae fermentation stabilize microbiota in rumen liquid digesta during grain-based subacute ruminal acidosis(SARA) in lactating dairy cows

Background Subacute ruminal acidosis(SARA)is a common metabolic disorder of high yielding dairy cows,and it is associated with dysbiosis of the rumen and gut microbiome and host inflammation.This study evaluated the impact of two postbiotics from Saccharomyces cerevisiae fermentation products(SCFP)on rumen liquid associated microbiota of lactating dairy cows subjected to repeated grain-based SARA challenges.A total of 32 rumen cannulated cows were randomly assigned to 4 treatments from 4 weeks before until 12 weeks after parturition.Treatment groups included a Control diet or diets supplemented with postbiotics(SCFPa,14 g/d Original XPC;SCFPb-1X,19 g/d Nutri Tek;SCFPb-2X,38 g/d Nutri Tek,Diamond V,Cedar Rapids,IA,USA).Grain-based SARA challenges were conducted during week 5(SARA1)and week 8(SARA2)after parturition by replacing 20%DM of the base total mixed ration(TMR)with pellets containing 50%ground barley and 50%ground wheat.Total DNA from rumen liquid samples was subjected to V3–V416S r RNA gene amplicon sequencing.Characteristics of rumen microbiota were compared among treatments and SARA stages.Results Both SARA challenges reduced the diversity and richness of rumen liquid microbiota,altered the overall composition(β-diversity),and its predicted functionality including carbohydrates and amino acids metabolic pathways.The SARA challenges also reduced the number of significant associations among different taxa,number of hub taxa and their composition in the microbial co-occurrence networks.Supplementation with SCFP postbiotics,in particular SCFPb-2X,enhanced the robustness of the rumen microbiota.The SCFP supplemented cows had less fluctuation in relative abundances of community members when exposed to SARA challenges.The SCFP supplementation promoted the populations of lactate utilizing and fibrolytic bacteria,including members of Ruminococcaceae and Lachnospiraceae,and also increased the numbers of hub taxa during non-SARA and SARA stages.Supplementation with SCFPb-2X prevented the fluctuations in the abundances of hub taxa that were positively correlated with the acetate concentration,andα-andβ-diversity metrics in rumen liquid digesta.Conclusions Induction of SARA challenges reduced microbiota richness and diversity and caused fluctuations in major bacterial phyla in rumen liquid microbiota in lactating dairy cows.Supplementation of SCFP postbiotics could attenuate adverse effects of SARA on rumen liquid microbiota.

Impact of Dietary Lactobacillus plantarum Postbiotics on the Performance of Layer Hens under Heat Stress Conditions

This experiment was conducted to determine the performance of heat-stressed layers fed a diet containing the probiotic Lactobacillus plantarum RS5 or its products of fermentation (postbiotics). Twenty-week-old Isa White layers, were subdivided into six treatments of 32 individually caged birds. Half of the birds were reared under regular temperature conditions, while the other half was subjected to cyclic daily heat stress. Layers were offered one of three diets: 1) Control;2) Control + Lactobacillus plantarum RS5 probiotic;3) Control + Lactobacillus plantarum RS5 postbiotics. Birds were tested for performance and visceral organ development for 5 months. Heat stress negatively affected the birds’ feed intake, egg weight, shell weight percentage, Haugh unit, shell thickness, yolk color, body weight and spleen weight percentage. Postbiotics significantly increased egg production (p < 0.05) in comparison to the control and the probiotic fed group (94.8% vs 92.6% vs 93.1%, respectively). Birds under probiotic or postbiotic diet showed a significantly higher (p < 0.05) feed intake and egg weight, although the probiotic had a more pronounced and gradual effect. Specific gravity, yolk weight percentage and shell thickness didn’t show differences among dietary groups. The Haugh Unit was significantly higher (p < 0.05) in probiotic group which also showed a significantly lower yolk color index (p < 0.05). The different feed treatments did not impact the bird’s viscera weight percentage, except for the ileum that was significantly lower (p < 0.05) under postbiotic supplementation. Both probiotics and postbiotics could be used as a potential growth promoters and might alleviate heat stress impact in poultry industry.

Probiotics and postbiotics in colorectal cancer:Prevention and complementary therapy

Colorectal cancer(CRC)is a leading cause of human mortality worldwide.As conventional anticancer therapy not always being effective,there is growing interest in innovative“drug-free”cancer treatments or interventions that improve the efficacy of established therapy.CRC is associated with microbiome alterations,a process known as dysbiosis that involves depletion and/or enrichment of particular gut bacterial species and their metabolic functions.Supplementing patient treatment with traditional probiotics(with or without prebiotics),nextgeneration probiotics(NGP),or postbiotics represents a potentially effective and accessible complementary anticancer strategy by restoring gut microbiota composition and/or by signaling to the host.In this capacity,restoration of the gut microbiota in cancer patients can stabilize and enhance intestinal barrier function,as well as promote anticarcinogenic,anti-inflammatory,antimutagenic or other biologically important biochemical pathways that show high specificity towards tumor cells.Potential benefits of traditional probiotics,NGP,and postbiotics include modulating gut microbiota composition and function,as well as the host inflammatory response.Their application in CRC prevention is highlighted in this review,where we consider supportive in vitro,animal,and clinical studies.Based on emerging research,NGP and postbiotics hold promise in establishing innovative treatments for CRC by conferring physiological functions via the production of dominant natural products and metabolites that provide new host-microbiota signals to combat CRC.Although favorable results have been reported,further investigations focusing on strain and dose specificity are required to ensure the efficacy and safety of traditional probiotics,NGP,and postbiotics in CRC prevention and treatment.

Gut health benefit and application of postbiotics in animal production

Gut homeostasis is of importance to host health and imbalance of the gut usually leads to disorders or diseases for both human and animal.Postbiotics have been applied in manipulating of gut health,and utilization of postbiotics threads new lights into the host health.Compared with the application of probiotics,the characteristics such as stability and safety of postbiotics make it a potential alternative to probiotics.Studies have reported the beneficial effects of components derived from postbiotics,mainly through the mechanisms including inhibition of pathogens,strengthen gut barrier,and/or regulation of immunity of the host.In this review,we summarized the characteristics of postbiotics,main compounds of postbiotics,potential mechanisms in gut health,and their application in animal production.

Postbiotics as potential new therapeutic agents for sepsis

Sepsis is the main cause of death in critically ill patients and gut microbiota dysbiosis plays a crucial role in sepsis.On the one hand,sepsis leads to the destruction of gut microbiota and induces and aggravates terminal organ dysfunction.On the other hand,the activation of pathogenic gut flora and the reduction in beneficial microbial products increase the susceptibility of the host to sepsis.Although probiotics or fecal microbiota transplantation preserve gut barrier function on multiple levels,their efficacy in sepsis with intestinal microbiota disruptions remains uncertain.Postbiotics consist of inactivated microbial cells or cell components.They possess antimicrobial,immunomodulatory,antioxidant and antiproliferative activities.Microbiota-targeted therapy strategies,such as postbiotics,may reduce the incidence of sepsis and improve the prognosis of patients with sepsis by regulating gut microbial metabolites,improving intestinal barrier integrity and changing the composition of the gut microbiota.They offer a variety of mechanisms and might even be superior to more conventional‘biotics’such as probiotics and prebiotics.In this review,we present an overview of the concept of postbiotics and summarize what is currently known about postbiotics and their prospective utility in sepsis therapy.Overall,postbiotics show promise as a viable adjunctive therapy option for sepsis.

New therapy for metabolic syndrome:Gut microbiome supplementation

The gut microbiota is important in the development and progression of metabolic illnesses such type 2 diabetes,cardiovascular disease(CVD),and obesity.This diverse community of microorganisms controls a variety of physiological functions,including metabolism,inflammation,and immune response.Understanding these interactions has resulted in novel therapeutic options,including microbiome supplementation.The gut microbiome is extremely susceptible to dietary changes,which can alter its makeup and function,influencing metabolite synthesis that affects host health.Certain metabolites,such as butyrate and propionate,have been proven to protect against metabolic illnesses,whereas trimethylamine has been linked to CVD.Prebiotics,probiotics,synbiotics,and postbiotics are being investigated by researchers as ways to change the gut microbiome and boost metabolic health.Despite advances in therapy and lifestyle adjustments,the prevalence of metabolic syndrome is increasing,emphasizing the need for new medicines.

Adjuvant postbiotic administration improves dental caries prognosis by restoring the oral microbiota

Conventional filling therapy fails to fundamentally reduce oral cariogenic bacteria.Thus,oral microbiota follow-up intervention after filling would be necessary for improving dental caries prognosis.We recruited 9 caries-free individuals,and 89 dental caries subjects(5 dropouts).Eighty-nine patients were randomized into three groups:caries(n=8;no treatment),control(n=40;filling),and postbiotics(n=41;filling and 14-day Probio-Eco®intervention).Salivary samples were collected at 0 day(after filling)and 14 days.Our results showed that the diversity of dental caries oral microbiota was significantly increased compared with healthy subjects,and filling could restore a healthier oral microbiota partially and temporarily.Thepostbiotics intervention keeps a low alpha-diversity.Co-occurrence network analysis showed that a more stable oral microbiota structure after postbiotics intervention.Taxonomic and functional annotation of the microbiota revealed that postbiotics co-treatment significantly:increased the relative abundance of Pseudomonas and P.reactans,decreased the relative abundance of Prevotella shahii,and enriched the energy metabolism-related pathways.BugBase-predicted phenotypes inferred to an oral microbiota with decreased potential pathogenic bacteria and increased oxidative stress-tolerant bacteria after postbiotics intervention.Collectively,it suggested that postbiotics co-treatment could be a promising strategy that restores the oral microecological balance for dental caries.

Gut microbiome supplementation as therapy for metabolic syndrome

The gut microbiome is defined as an ecological community of commensal symbiotic and pathogenic microorganisms that exist in our body.Gut microbiome dysbiosis is a condition of dysregulated and disrupted intestinal bacterial homeostasis,and recent evidence has shown that dysbiosis is related to chronic inflammation,insulin resistance,cardiovascular diseases(CVD),type 2 diabetes mellitus(T2DM),and obesity.It is well known that obesity,T2DM and CVD are caused or worsened by multiple factors like genetic predisposition,environmental factors,unhealthy high calorie diets,and sedentary lifestyle.However,recent evidence from human and mouse models suggest that the gut microbiome is also an active player in the modulation of metabolic syndrome,a set of risk factors including obesity,hyperglycemia,and dyslipidemia that increase the risk for CVD,T2DM,and other diseases.Current research aims to identify treatments to increase the number of beneficial microbiota in the gut microbiome in order to modulate metabolic syndrome by reducing chronic inflammation and insulin resistance.There is increasing interest in supplements,classified as prebiotics,probiotics,synbiotics,or postbiotics,and their effect on the gut microbiome and metabolic syndrome.In this review article,we have summarized current research on these supplements that are available to improve the abundance of beneficial gut microbiota and to reduce the harmful ones in patients with metabolic syndrome.

Growth performance,nutrient digestibility,intestinal morphology,cecal mucosal cytokines and serum antioxidant responses of broiler chickens to dietary enzymatically treated yeast and coccidia challenge

Background There is a growing search for natural feed additives to alleviate the deleterious effects of coccidia infection in poultry production.This study aimed to investigate the effect of enzymatically treated yeast(ETY) on the growth performance,nutrient digestibility,intestinal morphology,antioxidative status,and cecal mucosa cytokines of coccidia-challenged broiler chickens.Methods From d 1 to 14 post hatching,480 broiler chickens were allocated to 3 corn-soybean meal-based experimental diets with increasing concentrations of ETY(0,1,or 2 g/kg).The experiment was designed as a randomized complete block design with body weight(BW) used as a blocking factor.On d 14 post hatching,the birds were re-randomized within each of the 3 experimental diets.Each of the 3 diet groups was split into a challenge or no-challenge group.This resulted in a 3 × 2 factorial arrangement of treatments.The coccidia challenge was administered on d 15 by an oral gavage.Results Dietary ETY improved(P < 0.05) the G:F of birds on d 21 regardless of the challenge state and linearly increased(P < 0.01) the apparent ileal digestibility of dry matter(DM),nitrogen,and gross energy(GE).The coccidia challenge decreased(P < 0.05) BW gain and feed intake of broiler chickens and reduced(P < 0.01) the total tract retention of DM,GE,and nitrogen.The coccidia challenge increased(P < 0.01) the mRNA gene expression of TNFα,IL-1β,IL-10,and IL-6 in the cecal mucosa.There was a tendency(P ne = 0.08) for ETY to linearly reduce IL-1β expression.Additionally,ETY supplementation increased(P < 0.05) the geexpression of OCLN.Serum catalase increased(P < 0.05) with dietary ETY in broiler chickens on d 21.Dietary ETY linearly increased(P < 0.05) the ileal villus height to crypt depth ratio,and ileal goblet cell density in broiler chickens.The ileal and excreta oocyst counts decreased(P < 0.01) with increasing supplementation of dietary ETY in coccidia-challenged broiler chickens on d 21.Conclusions Dietary ETY enhanced nutrient utilization and augmented intestinal development in broiler chickens.However,dietary ETY did not completely attenuate the adverse effects of a coccidia challenge in broiler chickens.

Verification of Lactobacillus brevis tolerance to simulated gastric juice and the potential effects of postbiotic gamma-aminobutyric acid in streptozotocin-induced diabetic mice

The therapeutic effect of gamma-aminobutyric acid(GABA)on diabetes was spread as one of the alarming epidemics worldwide.The study aims to investigate the function of Lactobacillus brevis KLDS_(1.0727) and KLDS_(1.0373) strains as glutamic acid decarboxylase 65(GAD65)carriers capable of generating GABA by comparing in vitro free and freeze-dried models and GABA intervention in vivo.PCR amplification of gad and in vitro i.e.,(growth rate,viability at different pH,bile tolerance,and survivability in simulated gastric juice)were performed.In vivo experiments were conducted in 7 groups of C57BL/6J mice.Each group was injected with streptozotocin(Cont_(STZ),INSSTZ,LAC1_(STZ),LAC_(1MFDSTZ),LAC_(2STZ),LAC_(2MFDSTZ))daily except for the control(Cont).One group was injected with insulin(INSSTZ).The body weight and hyperglycemia in the blood were assessed weekly,post-euthanasia blood plasma parameters,insulin,and histological examination were evaluated.Results indicated L.brevis strains demonstrated a great tolerance to bile and simulated gastric juice in vitro(P<0.05).Cont_(STZ) had the highest average glucose level(6.84±6.46)mmol/L while INS_(STZ) expressed dramatically decreed in glucose level and displayed a significant decline in the average of weekly blood glucose(−5.74±3.08)mmol/L.The lowest body weight(ContSTZ)was(19.30±0.25)g.Based on the blood plasma analysis,L.brevis strains improved good cholesterol properties,liver and kidney functions,where most of these parameters fall within the average the reference range and prevent the development of symptoms of type 1 diabetes in vivo.As recommended,L.brevis should be commonly distributed as a postbiotic GABA in pharmaceutical and nutritional applications.

The Prebiotic Effect of Triple Biotic Technology on Skin Health

Objective: Pre-, pro- and postbiotics are becoming more prevalent as ingredients in cosmetic and personal care products. A novel triple biotic technology has been developed and investigated for its impact on skin flora and skin barrier properties. Methods: Growth inhibition/promotion assay was performed to determine the effect on skin bacteria growth, using Escherichia coli, Corynebacterium striatum, Staphylococcus aureus, and Staphylococcus epidermidis. A skin penetration assay and skin barrier biomarker measurements were performed using an ex vivo human skin explant model. The triple-biotic complex of inulin, 2-butyloctanol, and a biomimic blend of postbiotics was tested individually as well as part of cosmetic formulations. Results: The triple-biotic technology, either as individual components or in a cosmetic formulation, inhibited the growth of undesirable bacteria, in most cases. On the other hand, the growth of desirable bacteria was either promoted or maintained. The cosmetic formulations with the triple-biotic technology demonstrated an enhanced skin barrier and an increase in skin barrier biomarkers. Conclusion: A novel triple-biotic technology has been developed and shown to deliver a strong prebiotic effect with demonstrable benefits on bacterial growth, skin barrier properties, and the production of skin barrier biomarkers. This study indicates that triple-biotic technology can be used as a desirable prebiotic ingredient in personal care products to provide skin health benefits.

Potential biotherapeutic properties of lactic acid bacteria in foods

Today,the use of microorganisms to produce substances that can be consumable,used as a food ingredient and have a positive effect on consumer health is attracting attention and studies in this field are increasing.Besides,the therapeutic products produced by lactic acid bacteria(LAB)can be used in the food and pharmaceutical industry to create desirable characteristics of foods.In addition to the positive effects of LAB,probiotics and synbiotics have been known for many years,many studies examining postbiotics and paraprobiotics have attracted attention in recent years.The therapeutic products obtained from different LAB may have different properties and should be investigated widely.In this paper,the biotherapeutic substances produced by LAB and their effects on health are summarized.