Previous study have demonstrated that a compound composed of water-soluable Ganoderma lucidum polysaccharides(GLP)and Polyporus umbellatus polysaccharides(PUP)in a ratio of 3:1 named GPP enhances innate immune functio...Previous study have demonstrated that a compound composed of water-soluable Ganoderma lucidum polysaccharides(GLP)and Polyporus umbellatus polysaccharides(PUP)in a ratio of 3:1 named GPP enhances innate immune function in mice through enhancing the function of macrophage cells and activity of natural killer(NK)cells.Here in our research,we further investigated the effect of GPP on the diversity and composition of intestinal flora,and explored its effect on colitis model mice.The immunoregulatory verification experiments of GPP were conducted in both normal and DSS-induced mice model.Our research showed that GPP increased the diversity of intestinal microorganisms in mice with the extension of administration time.Daily GPP intake attenuated DSS-induced colon injury,protected the splenic lymphocyte proliferation ability,enhanced the serum hemolysin synthesis,and increased peripheral phagocytes and NK cell activity in model mice.Comparisons of the predominant gene pathways of the bacterial microbiota showed that DNA repair and recombination,base mismatch repair pathways was stronger in GPP-treatment group than in control group,indicating the possible molecular mechanisms of immune function regulation.Our study showed that GPP regulated immune function in both health and colitis model,and had a positive effect on maintaining intestinal flora homeostasis.展开更多
Increasing incidences showed that food allergies have attracted more and more attention from researchers.BALB/c mice were sensitized with wheat gluten combined with aluminum hydroxide adjuvant via intraperitoneal inje...Increasing incidences showed that food allergies have attracted more and more attention from researchers.BALB/c mice were sensitized with wheat gluten combined with aluminum hydroxide adjuvant via intraperitoneal injection,transdermal sensitization,and oral gavage sensitization route.Results showed that all the three sensitization methods could induce allergic symptoms;increase the serum antibody(total immunoglobulin E(IgE),specific IgE,IgG,IgA)and histamine content;promote the secretion of Th2 cytokines(interleukin(IL)-4,IL-5,IL-13)and inflammatory factors(IL-6,IL-17 A,IL-10);and inhibit the production of Th1 cytokines(IFN-γ,IL-2).However,the allergic symptoms of mice sensitized by intraperitoneal injection were the most obvious among the three models.The level of serum antibodies in intraperitoneal injection group was significantly higher than control.Subsequently,16 S rRNA sequencing technology was used to analyze the intestinal flora of mice.The results showed that the abundance of Firmicutes in the wheat protein sensitized group was lower than that in the normal group,while the abundance of Bacteroidetes was higher,and Lactobacillus was the difference marker in normal group.Bacterial species diversity analysis showed that the species richness and diversity of intestinal flora in mice were decreased,the difference between mice induced by intraperitoneal injection and normal control group mice was the most significant.Taken together,these results show that among three sensitization methods used to build a mouse model with aluminum hydroxide as adjuvant,intraperitoneal injection is the comparably best way to build a mouse sensitization mode.展开更多
This study was performed to determine the effects of bacteriocin-producing and non-bacteriocin-producing Pediococcus acidilactici strains on the immune system and intestinal flora of normal mice.Two P.acidilactici str...This study was performed to determine the effects of bacteriocin-producing and non-bacteriocin-producing Pediococcus acidilactici strains on the immune system and intestinal flora of normal mice.Two P.acidilactici strains with antibacterial activity(P.acidilactici CCFM28 and CCFM18)were obtained based on the inhibition-zone assay.The produced components were identified as bacteriocins through protease treatment,pH adjustment and hydrogen peroxide treatment.Bacteriocin-producing and non-bacteriocin-producing P.acidilactici strains(P.acidilactici CCFM28,CCFM18 and NT17-3)caused significant changes in serum immune factors and intestinal flora of normal mice.After 14 days of intervention,the relative abundance of Firmicutes was significantly decreased,but that of Proteobacteria was significantly increased at the phylum level.At the genus level,the administration of three P.acidilactici strains resulted in the downregulation of Blautia and the upregulation of Ruminococcus and Lactobacillus.Furthermore,there were also different regulations on some probiotic strains,such as Bifidobacterium,Coprococcus and Akkermansia,which were closely related to the antibacterial ability of the bacteriocin and the type of strain.The results indicated that the intervention of different P.acidilactici strains could differently change the structure of intestinal flora in normal mice,which provided theoretical guidance for the selective use of bacteriocin-producing strains for health regulation in the future.展开更多
Although monosodium glutamate(MSG)is a widely used food additive,its safety and systemic side effects have not been fully clarified.The intestinal flora is closely associated with human health;however,it remains uncle...Although monosodium glutamate(MSG)is a widely used food additive,its safety and systemic side effects have not been fully clarified.The intestinal flora is closely associated with human health;however,it remains unclear whether MSG consumption can affect health by acting on the intestinal flora.In this study,serum biomarkers,intestinal structure,intestinal immunity,and intestinal flora were examined to investigate the effects of different doses of sodium glutamate on the body,intestinal function,and intestinal flora of mice.The results showed that 30 mg/kg MSG had no significant effect on serum C-reactive protein,trimethylamine N-oxide,angiotensin II,intestinal interleukin(IL)-1β,IL-6,tumor necrosis factor-α,secretory IgA and fecal albumin in mice,but also promoted intestinal development and regulated the intestinal flora.Moreover,1500 mg/kg MSG increased the risk of cardiovascular disease and damaged the intestinal structure and flora.In this study,MSG was also found to be healthier than salt at the equivalent sodium concentration.Collectively,these findings suggested that low doses of MSG were safe for mice and may have some health benefits as a probiotic by promoting intestinal development and regulating the intestinal flora.展开更多
Currently, accumulating pieces of evidence indicate that probiotics, living in the gastrointestinal tract, play an important role in regulating host metabolism. As a tool, probiotics have great potential for treating ...Currently, accumulating pieces of evidence indicate that probiotics, living in the gastrointestinal tract, play an important role in regulating host metabolism. As a tool, probiotics have great potential for treating lipid metabolism diseases. However, the relationship between probiotics and abnormal lipid metabolism is still unclear, and the mechanism of action has been become a focus of microbiome research. Therefore, taking intestinal probiotics as the starting point, this article combs the relationship between probiotics and lipid metabolism. Moreover, we discuss the underlying mechanisms of intestinal probiotics regulating lipid metabolism and summarize the therapeutic strategies for abnormal lipids metabolism. This article provides a reference for the further utilization of probiotics in the field of functional foods(food industry). Meanwhile, it will benefit the clinical diagnosis and treatment of lipid metabolism diseases.展开更多
Objective:To investigate the influence of xylooligosaccharides on skin inflammation,behavioral characteristics,neurotransmitters,and gut flora in a mouse model of atopic dermatitis(AD)induced by 2,4-dinitrofluorobenze...Objective:To investigate the influence of xylooligosaccharides on skin inflammation,behavioral characteristics,neurotransmitters,and gut flora in a mouse model of atopic dermatitis(AD)induced by 2,4-dinitrofluorobenzene(DNFB).Methods:The AD mouse model was created by administration of DNFB for 14 consecutive days.The scoring atopic dermatitis index,enzyme-linked immunosorbent assay(ELISA),histopathology,and immunohistochemical analyses were used to assess inflammation and depression-like behaviors.Furthermore,high-throughput 16S rRNA gene sequencing was used to determine the composition of fecal microbiota.Results:Xylooligosaccharides treatment reduced the number of scratches and skin thickness,mast cell infiltration and the levels of immunoglobulin(Ig)E and T-helper cytokines compared with the AD model group.Meanwhile,xylooligosaccharides treatment reduced the immobility time of mice in the forced swimming test and increased the total movement distance and movement distance in the center area in the open-field test.Furthermore,5-hydroxytryptamine and dopamine expression in the brain was increased following xylooligosaccharides treatment.Using network pharmacology,Gene Ontology analysis showed that the targets were mainly enriched in phosphatase binding and the regulation of leukocyte differentiation,which ameliorated AD mainly through the hypoxia inducible factor-1 and phosphatidylinositide 3-kinase-protein kinase B pathways.16S rRNA gene sequencing,diversity indices,and gut microbial taxonomic composition analysis showed DNFB-induced changes in intestinal microbiota diversity in AD mice.Comparative analysis indicated that xylooligosaccharides intake improved the gut microbiome by dramatically enhancing the concentration of Lactobacillus while decreasing the concentration of Bacteroides in mice.Conclusion:Xylooligosaccharides reduce inflammatory dermatosis and related depression-like behaviors via regulating intestinal homeostasis,having medicinal value as a nutritional and functional ingredient.展开更多
This is the first report on a polysaccharide(RCJ2-Ib)isolated from Rosa Chinensis Flos.RCJ2-Ib was obtained through the extraction with water,precipitation with ethanol,separation with DEAE-52 column and purification ...This is the first report on a polysaccharide(RCJ2-Ib)isolated from Rosa Chinensis Flos.RCJ2-Ib was obtained through the extraction with water,precipitation with ethanol,separation with DEAE-52 column and purification with DEAE-Sepharose Fast Flow column and Sephadex G100 column.GC,FT-IR and NMR analyses revealed that RCJ2-Ib(3.3 k Da)was a 1,4-linked polymannuronic acid containing substantialβ-Danomers units.The anticoagulant effect of RCJ2-Ib evaluated by using rabbit ear venous blood and an acute blood stasis rat model showed that RCJ2-Ib had obvious anticoagulant activity in regulating endogenous and exogenous coagulation pathways and reducing serum thromboxane B2 and endothelin-1.In addition,RCJ2-Ib could also increase the number of Lactobacillus and Escherichia coli.As a result,RCJ2-Ib has the potential to inhibit thrombosis and maintain the intestinal environment.展开更多
基金financially supported by grants from the National Key R&D Program of China(2018YFD0400204)the National Natural Science Foundation of China(81974503,81871095)the Key International S&T Cooperation Program of China(2016YFE113700)。
文摘Previous study have demonstrated that a compound composed of water-soluable Ganoderma lucidum polysaccharides(GLP)and Polyporus umbellatus polysaccharides(PUP)in a ratio of 3:1 named GPP enhances innate immune function in mice through enhancing the function of macrophage cells and activity of natural killer(NK)cells.Here in our research,we further investigated the effect of GPP on the diversity and composition of intestinal flora,and explored its effect on colitis model mice.The immunoregulatory verification experiments of GPP were conducted in both normal and DSS-induced mice model.Our research showed that GPP increased the diversity of intestinal microorganisms in mice with the extension of administration time.Daily GPP intake attenuated DSS-induced colon injury,protected the splenic lymphocyte proliferation ability,enhanced the serum hemolysin synthesis,and increased peripheral phagocytes and NK cell activity in model mice.Comparisons of the predominant gene pathways of the bacterial microbiota showed that DNA repair and recombination,base mismatch repair pathways was stronger in GPP-treatment group than in control group,indicating the possible molecular mechanisms of immune function regulation.Our study showed that GPP regulated immune function in both health and colitis model,and had a positive effect on maintaining intestinal flora homeostasis.
基金supported by the National Key Research and Development Program of China(2019YFC1605000)the National Natural Science Foundation(1872904)。
文摘Increasing incidences showed that food allergies have attracted more and more attention from researchers.BALB/c mice were sensitized with wheat gluten combined with aluminum hydroxide adjuvant via intraperitoneal injection,transdermal sensitization,and oral gavage sensitization route.Results showed that all the three sensitization methods could induce allergic symptoms;increase the serum antibody(total immunoglobulin E(IgE),specific IgE,IgG,IgA)and histamine content;promote the secretion of Th2 cytokines(interleukin(IL)-4,IL-5,IL-13)and inflammatory factors(IL-6,IL-17 A,IL-10);and inhibit the production of Th1 cytokines(IFN-γ,IL-2).However,the allergic symptoms of mice sensitized by intraperitoneal injection were the most obvious among the three models.The level of serum antibodies in intraperitoneal injection group was significantly higher than control.Subsequently,16 S rRNA sequencing technology was used to analyze the intestinal flora of mice.The results showed that the abundance of Firmicutes in the wheat protein sensitized group was lower than that in the normal group,while the abundance of Bacteroidetes was higher,and Lactobacillus was the difference marker in normal group.Bacterial species diversity analysis showed that the species richness and diversity of intestinal flora in mice were decreased,the difference between mice induced by intraperitoneal injection and normal control group mice was the most significant.Taken together,these results show that among three sensitization methods used to build a mouse model with aluminum hydroxide as adjuvant,intraperitoneal injection is the comparably best way to build a mouse sensitization mode.
基金supported by the National Natural Science Foundation of China Program(32021005)the Natural Science Foundation of Jiangsu Province(BK20200084)+2 种基金Projects of Innovation and Development Pillar Program for Key Industries in Southern Xinjiang of Xinjiang Production and Construction Corps(2018DB002)National First Class Discipline Program of Food Science and Technology(JUFSTR20180102)the Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province。
文摘This study was performed to determine the effects of bacteriocin-producing and non-bacteriocin-producing Pediococcus acidilactici strains on the immune system and intestinal flora of normal mice.Two P.acidilactici strains with antibacterial activity(P.acidilactici CCFM28 and CCFM18)were obtained based on the inhibition-zone assay.The produced components were identified as bacteriocins through protease treatment,pH adjustment and hydrogen peroxide treatment.Bacteriocin-producing and non-bacteriocin-producing P.acidilactici strains(P.acidilactici CCFM28,CCFM18 and NT17-3)caused significant changes in serum immune factors and intestinal flora of normal mice.After 14 days of intervention,the relative abundance of Firmicutes was significantly decreased,but that of Proteobacteria was significantly increased at the phylum level.At the genus level,the administration of three P.acidilactici strains resulted in the downregulation of Blautia and the upregulation of Ruminococcus and Lactobacillus.Furthermore,there were also different regulations on some probiotic strains,such as Bifidobacterium,Coprococcus and Akkermansia,which were closely related to the antibacterial ability of the bacteriocin and the type of strain.The results indicated that the intervention of different P.acidilactici strains could differently change the structure of intestinal flora in normal mice,which provided theoretical guidance for the selective use of bacteriocin-producing strains for health regulation in the future.
基金supported by the Inner Mongolia Autonomous Region Science and Technology Achievement Transformation Project(CGZH2018035).
文摘Although monosodium glutamate(MSG)is a widely used food additive,its safety and systemic side effects have not been fully clarified.The intestinal flora is closely associated with human health;however,it remains unclear whether MSG consumption can affect health by acting on the intestinal flora.In this study,serum biomarkers,intestinal structure,intestinal immunity,and intestinal flora were examined to investigate the effects of different doses of sodium glutamate on the body,intestinal function,and intestinal flora of mice.The results showed that 30 mg/kg MSG had no significant effect on serum C-reactive protein,trimethylamine N-oxide,angiotensin II,intestinal interleukin(IL)-1β,IL-6,tumor necrosis factor-α,secretory IgA and fecal albumin in mice,but also promoted intestinal development and regulated the intestinal flora.Moreover,1500 mg/kg MSG increased the risk of cardiovascular disease and damaged the intestinal structure and flora.In this study,MSG was also found to be healthier than salt at the equivalent sodium concentration.Collectively,these findings suggested that low doses of MSG were safe for mice and may have some health benefits as a probiotic by promoting intestinal development and regulating the intestinal flora.
基金sponsored by the Natural Science Foundation of Zhejiang Province (LQ22C200002)Shenzhen Peacock Talent Programs Research Start-up Grant (802-012677)Shenzhen Key Laboratory Foundation (ZDSYS20200811143757022)。
文摘Currently, accumulating pieces of evidence indicate that probiotics, living in the gastrointestinal tract, play an important role in regulating host metabolism. As a tool, probiotics have great potential for treating lipid metabolism diseases. However, the relationship between probiotics and abnormal lipid metabolism is still unclear, and the mechanism of action has been become a focus of microbiome research. Therefore, taking intestinal probiotics as the starting point, this article combs the relationship between probiotics and lipid metabolism. Moreover, we discuss the underlying mechanisms of intestinal probiotics regulating lipid metabolism and summarize the therapeutic strategies for abnormal lipids metabolism. This article provides a reference for the further utilization of probiotics in the field of functional foods(food industry). Meanwhile, it will benefit the clinical diagnosis and treatment of lipid metabolism diseases.
文摘Objective:To investigate the influence of xylooligosaccharides on skin inflammation,behavioral characteristics,neurotransmitters,and gut flora in a mouse model of atopic dermatitis(AD)induced by 2,4-dinitrofluorobenzene(DNFB).Methods:The AD mouse model was created by administration of DNFB for 14 consecutive days.The scoring atopic dermatitis index,enzyme-linked immunosorbent assay(ELISA),histopathology,and immunohistochemical analyses were used to assess inflammation and depression-like behaviors.Furthermore,high-throughput 16S rRNA gene sequencing was used to determine the composition of fecal microbiota.Results:Xylooligosaccharides treatment reduced the number of scratches and skin thickness,mast cell infiltration and the levels of immunoglobulin(Ig)E and T-helper cytokines compared with the AD model group.Meanwhile,xylooligosaccharides treatment reduced the immobility time of mice in the forced swimming test and increased the total movement distance and movement distance in the center area in the open-field test.Furthermore,5-hydroxytryptamine and dopamine expression in the brain was increased following xylooligosaccharides treatment.Using network pharmacology,Gene Ontology analysis showed that the targets were mainly enriched in phosphatase binding and the regulation of leukocyte differentiation,which ameliorated AD mainly through the hypoxia inducible factor-1 and phosphatidylinositide 3-kinase-protein kinase B pathways.16S rRNA gene sequencing,diversity indices,and gut microbial taxonomic composition analysis showed DNFB-induced changes in intestinal microbiota diversity in AD mice.Comparative analysis indicated that xylooligosaccharides intake improved the gut microbiome by dramatically enhancing the concentration of Lactobacillus while decreasing the concentration of Bacteroides in mice.Conclusion:Xylooligosaccharides reduce inflammatory dermatosis and related depression-like behaviors via regulating intestinal homeostasis,having medicinal value as a nutritional and functional ingredient.
基金supported by Research on Precision Nutrition and Health Food,Department of Science and Technology of Henan Province(CXJD2021006)Key Project in Science and Technology Agency of Henan Province(202102110283 and 202102110149)。
文摘This is the first report on a polysaccharide(RCJ2-Ib)isolated from Rosa Chinensis Flos.RCJ2-Ib was obtained through the extraction with water,precipitation with ethanol,separation with DEAE-52 column and purification with DEAE-Sepharose Fast Flow column and Sephadex G100 column.GC,FT-IR and NMR analyses revealed that RCJ2-Ib(3.3 k Da)was a 1,4-linked polymannuronic acid containing substantialβ-Danomers units.The anticoagulant effect of RCJ2-Ib evaluated by using rabbit ear venous blood and an acute blood stasis rat model showed that RCJ2-Ib had obvious anticoagulant activity in regulating endogenous and exogenous coagulation pathways and reducing serum thromboxane B2 and endothelin-1.In addition,RCJ2-Ib could also increase the number of Lactobacillus and Escherichia coli.As a result,RCJ2-Ib has the potential to inhibit thrombosis and maintain the intestinal environment.
