BACKGROUND The pathogenicity of Helicobacter pylori is dependent on factors including the environment and the host.Although selenium is closely related to pathogenicity as an environmental factor,the specific correlat...BACKGROUND The pathogenicity of Helicobacter pylori is dependent on factors including the environment and the host.Although selenium is closely related to pathogenicity as an environmental factor,the specific correlation between them remains unclear.AIM To investigate how selenium acts on virulence factors and reduces their toxicity.METHODS H.pylori strains were induced by sodium selenite.The expression of cytotoxin-associated protein A(CagA)and vacuolating cytotoxin gene A(VacA)was determined by quantitative PCR and Western blotting.Transcriptomics was used to analyze CagA,CagM,CagE,Cag1,Cag3,and CagT.C57BL/6A mice were infected with the attenuated strains subjected to sodium selenite induction,and H.pylori colonization,inflammatory reactions,and the cell adhesion ability of H.pylori were assessed.RESULTS CagA and VacA expression was upregulated at first and then downregulated in the H.pylori strains after sodium selenite treatment.Their expression was significantly and steadily downregulated after the 5th cycle(10 d).Transcriptome analysis revealed that sodium selenite altered the levels affect H.pylori virulence factors such as CagA,CagM,CagE,Cag1,Cag3,and CagT.Of these factors,CagM and CagE expression was continuously downregulated and further downregulated after 2 h of induction with sodium selenite.Moreover,CagT expression was upregulated before the 3rd cycle(6 d)and significantly downregulated after the 5th cycle.Cag1 and Cag3 expression was upregulated and downregulated,respectively,but no significant change was observed by the 5th cycle.C57BL/6A mice were infected with the attenuated strains subjected to sodium selenite induction.The extent of H.pylori colonization in the stomach increased;however,sodium selenite also induced a mild inflammatory reaction in the gastric mucosa of H.pylori-infected mice,and the cell adhesion ability of H.pylori was significantly weakened.CONCLUSION These results demonstrate that H.pylori displayed virulence attenuation after the 10th d of sodium selenite treatment.Sodium selenite is a low toxicity compound with strong stability that can reduce the cell adhesion ability of H.pylori,thus mitigating the inflammatory damage to the gastric mucosa.展开更多
AIM: To investigate the inhibitory effects of emodin, baicalin, etc.on the hefA gene of multidrug resistance(MDR) in Helicobacter pylori(H.pylori).METHODS: The double dilution method was used to screen MDR H.pylori st...AIM: To investigate the inhibitory effects of emodin, baicalin, etc.on the hefA gene of multidrug resistance(MDR) in Helicobacter pylori(H.pylori).METHODS: The double dilution method was used to screen MDR H.pylori strains and determine the minimum inhibitory concentrations(MICs) of emodin, baicalin, schizandrin, berberine, clarithromycin, metronidazole, tetracycline, amoxicillin and levofloxacin against H.pylori strains.After the screened MDR stains were treated with emodin, baicalin, schizandrin or berberine at a 1/2 MIC concentration for 48 h, changes in MICs of amoxicillin, tetracycline, levofloxacin, metronidazole and clarithromycin were determined.MDR strains with reduced MICs of amoxicillin were selected to detect the hefA mR NA expression by realtime quantitative PCR.RESULTS: A total of four MDR H.pylori strains were screened.Treatment with emodin, baicalin, schizandrin and berberine significantly decreased the MICs of amoxicillin and tetracycline against some strains, decreased by 1 to 2 times, but did not significantly change the MICs of clarithromycin, levofloxacin, and metronidazole against MDR strains.In the majority of strains with reduced MICs of amoxicillin, hef A m RNA expression was decreased; one-way ANOVA(SPSS 12.0) used for comparative analysis, P < 0.05.CONCLUSION: Emodin, baicalin, schizandrin and berberine significantly decreased the MICs of amoxicillin and tetracycline against some H.pylori strains, possibly by mechanisms associated with decreasing hefA mR NA expression.展开更多
AIM To reveal the protective mechanism of the combined use of vitamin D and puerarin in the progression of hepatic fibrosis induced by carbon tetrachloride(CCl4).METHODS Eight-week-old male Wistar rats were randomly d...AIM To reveal the protective mechanism of the combined use of vitamin D and puerarin in the progression of hepatic fibrosis induced by carbon tetrachloride(CCl4).METHODS Eight-week-old male Wistar rats were randomly divided into a normal control group(C group), a CCl4 group(CCl4 group), a vitamin D group(V group), a puerarin group(P group), and a combined group of vitamin D and puerarin(V + P group), each of which contained ten rats. In this way, we built a rat model of CCl4-induced hepatic fibrosis with intervention by vitamin D, puerarin, or a combination of the two. After eight weeks, the mice were sacrificed to collect serum and liver specimens. Blood was collected to detect the hyaluronic acid(HA). We also measured hydroxyproline(Hyp) and prepared paraffin sections of liver. After Sirius red staining, the liver specimens were observed under a microscope. RT-PCR and western blot analysis were adopted to detect the mRNA and the proteinlevels of Collagen I, Collagen III, Wnt1, and β-catenin in the liver tissues, respectively.RESULTS Hepatic fibrosis was observed in the CCl4 group. In comparison, hepatic fibrosis was attenuated in the V, P, and V + P groups: the HA level in blood and the Hyp level in liver were reduced, and the mRNA levels of Collagen I, Collagen III, Wnt, and β-catenin in liver were also decreased, as well as the protein levels of Wnt1 and β-catenin. Among these groups, the V + P group demonstrated the greatest amelioration of hepatic fibrosis.CONCLUSION The combined application of vitamin D and puerarin is capable of alleviating CCl4-induced hepatic fibrosis of rats. As to the mechanism, it is probably because the combined use is able to silence the Wnt1/β-catenin pathway, suppress the activation of hepatic stellate cells, and reduce the secretion of collagen fibers, therefore improving the anti-hepatic fibrosis effect.展开更多
AIM To explore the induction effects and mechanism of Solanum lyratum Thumb(ST) on human hepatocellularcarcinoma SMMC-7721 cells through the mitochondrial pathway.METHODS The experiments were conducted on three groups...AIM To explore the induction effects and mechanism of Solanum lyratum Thumb(ST) on human hepatocellularcarcinoma SMMC-7721 cells through the mitochondrial pathway.METHODS The experiments were conducted on three groups: an experimental group (with ST ethanol extracts' concentration being 2.5, 5 and 10 mg/L), a negative control group (with only nutrient solution, 0 mg/L ST ethanol extracts), and a positive control group (2.5 mg/L DDP). The inhibition rate of cell proliferation was checked by using the methyl thiazolyl tetrazolium method, and cell apoptosis was tested by TUNEL method. Furthermore, RT-PCR was used to examine m RNA expression of Fas, Fas L, caspase-8, caspase-3, p53 and Bcl-2 genes.RESULTS Compared with the negative control group, the inhibition and apoptosis rates of the experimental group with different concentrations of ST extracts on human hepatocellular carcinoma SMMC-7721 cells significantly increased(P<0.05). Besides, the m RNA expression of Fas L and Bcl-2 significantly decreased(P<0.05) while the m RNA expression of Fas, caspase-8, caspase-3 and p53 increased significantly. When compared with the positive control group, the experimental groups with 5 mg/L ST ethanol extracts showed effects similar to the positive control group.CONCLUSION ST ethanol extracts induced the apoptosis of hepatocellular carcinoma SMMC-7721 cells through up-regulated Fas, caspase-8, caspse-3 and p53, and down-regulated Fas L and Bcl-2 in the mitochondrial pathway.展开更多
AIM: To investigate the rate of Helicobacter pylori (H. pylori) resistance to clarithromycin among ethnic minority patients in Guangxi, explore the underlying mechanisms, and analyze factors influencing genotype distr...AIM: To investigate the rate of Helicobacter pylori (H. pylori) resistance to clarithromycin among ethnic minority patients in Guangxi, explore the underlying mechanisms, and analyze factors influencing genotype distribution of H. pylori isolates.展开更多
Helicobacter pylori(H.pylori)has a high rate of infection and antibiotic resistance and poses a serious threat to human life.One of the main strategies to overcome drug resistance is to develop new treatment plans.Tra...Helicobacter pylori(H.pylori)has a high rate of infection and antibiotic resistance and poses a serious threat to human life.One of the main strategies to overcome drug resistance is to develop new treatment plans.Traditional Chinese medicine(TCM)that is commonly used to treat many diseases in China can reduce drug resistance and increase the eradication rate of H.pylori.In this paper,we review the research progress on TCM in the treatment of H.pylori infection.The mechanism of action of TCM is reviewed and research and applications of TCM in the treatment of H.pylori are demonstrated.Finally,we discuss problems confronting the use of TCM for the treatment of H.pylori infection and propose possible solutions.In addition,the plans of TCM in H.pylori treatment were also screened:Dampness-heat syndrome in the spleen and stomach,deficiency of spleen and stomach,and cold-heat complicated syndrome,and the effective components therein are studied.The antibacterial effect of TCM is relatively slow;for rapid improvement of the treatment effect of refractory H.pylori gastritis,we provide an appropriate treatment regime combining TCM and Western medicine with immune-regulatory and synergistic antibacterial effects.展开更多
Helicobacter pylori(H. pylori) is a kind of chronic infectious pathogen which can cause chronic gastritis, peptic ulcer, gastric cancer and other diseases. The genetic structure of the pathogenic genes of H. pylori va...Helicobacter pylori(H. pylori) is a kind of chronic infectious pathogen which can cause chronic gastritis, peptic ulcer, gastric cancer and other diseases. The genetic structure of the pathogenic genes of H. pylori varies largely, which contributes to the differences in virulence among various strains, and in clinical symptoms. Virulence genes of H. pylori can be categorized into three main classes: those related to adhesion and colonization, those related to gastric mucosal injury, and others. This review focuses on the relationship between genetic polymorphisms of the three classes of virulence genes of H. pylori and diseases. Most of the genetic polymorphisms of the main virulence factors of H. pylori are summarized in this paper.展开更多
BACKGROUND At present,there is no ideal method to cure diabetes,and there are few reports on the treatment of diabetes with probiotics.AIM To propose a method for preparing a new type of chromium-and zinc-rich Acetoba...BACKGROUND At present,there is no ideal method to cure diabetes,and there are few reports on the treatment of diabetes with probiotics.AIM To propose a method for preparing a new type of chromium-and zinc-rich Acetobacter aceti(A.aceti)and explore its ability to enhance the hypoglycemic effects of probiotics in the treatment of diabetes.METHODS A.aceti was cultured in a liquid medium that contained chromium trichloride and zinc chloride,both at a concentration of 64 mg/mL,with the initial concentration of the bacterial solution 1×10^(4) CFU/mL.After the bacterial solution had been inducted for 48 h,the culture media was changed and the induction was repeated once.The levels of chromium and zinc in the bacteria were detected by inductively coupled plasma mass spectrometry,and the contents of NADH and glucose dehydrogenase were determined using an NAD/NADH kit and glucose dehydrogenase kit,respectively.Streptozotocin was used to establish a mouse model to evaluate the hypoglycemic effects of the proposed chromium-and zincrich A.aceti.Ten-times the therapeutic dose was administered to evaluate its biological safety.The effect on MIN6 islet cells was also assessed in vitro.RESULTS The levels of chromium metal,metallic zinc,NADH coenzyme,and glucose dehydrogenase in A.aceti prepared by this method were 28.58-34.34 mg/kg,5.35-7.52 mg/kg,5.13-7.26μM,and 446.812-567.138 U/g,respectively.The use of these bacteria resulted in a better hypoglycemic effect than metformin,promoting the repair of tissues and cells of pancreatic islets in vivo and facilitating the growth of MIN6 pancreatic islet cells and increasing insulin secretion in vitro.Ten-times the therapeutic dose of treatment was non-toxic to mice.CONCLUSION Chromium trichloride and zinc chloride can be employed to induce the preparation of chromiumand zinc-rich A.aceti,which can then promote the hypoglycemic effect found in normal A.aceti.The bacteria biotransforms the chromium and zinc in a way that could increase their safety as a treatment for diabetes.展开更多
基金National Natural Science Foundation of China,No.32060018 and No.32360035Through Special Fund Projects for Guide Local Science and Technology Development by the China Government,No.GUIKEZY20198004+2 种基金Anhui Provincial Natural Science Foundation,No.2308085QH245the Natural Science Foundation of the Anhui Higher Education Institutions of China,No.2023AH040261Changzhou Science and Technology Project Fund,No.CJ20210012.
文摘BACKGROUND The pathogenicity of Helicobacter pylori is dependent on factors including the environment and the host.Although selenium is closely related to pathogenicity as an environmental factor,the specific correlation between them remains unclear.AIM To investigate how selenium acts on virulence factors and reduces their toxicity.METHODS H.pylori strains were induced by sodium selenite.The expression of cytotoxin-associated protein A(CagA)and vacuolating cytotoxin gene A(VacA)was determined by quantitative PCR and Western blotting.Transcriptomics was used to analyze CagA,CagM,CagE,Cag1,Cag3,and CagT.C57BL/6A mice were infected with the attenuated strains subjected to sodium selenite induction,and H.pylori colonization,inflammatory reactions,and the cell adhesion ability of H.pylori were assessed.RESULTS CagA and VacA expression was upregulated at first and then downregulated in the H.pylori strains after sodium selenite treatment.Their expression was significantly and steadily downregulated after the 5th cycle(10 d).Transcriptome analysis revealed that sodium selenite altered the levels affect H.pylori virulence factors such as CagA,CagM,CagE,Cag1,Cag3,and CagT.Of these factors,CagM and CagE expression was continuously downregulated and further downregulated after 2 h of induction with sodium selenite.Moreover,CagT expression was upregulated before the 3rd cycle(6 d)and significantly downregulated after the 5th cycle.Cag1 and Cag3 expression was upregulated and downregulated,respectively,but no significant change was observed by the 5th cycle.C57BL/6A mice were infected with the attenuated strains subjected to sodium selenite induction.The extent of H.pylori colonization in the stomach increased;however,sodium selenite also induced a mild inflammatory reaction in the gastric mucosa of H.pylori-infected mice,and the cell adhesion ability of H.pylori was significantly weakened.CONCLUSION These results demonstrate that H.pylori displayed virulence attenuation after the 10th d of sodium selenite treatment.Sodium selenite is a low toxicity compound with strong stability that can reduce the cell adhesion ability of H.pylori,thus mitigating the inflammatory damage to the gastric mucosa.
基金Supported by Grants from Guangxi Key Discipline Fund(Pathogenic Microbiology),No.[2013]16Key Laboratory Fund of Colleges and Universities in Guangxi,No.Gui Jiao Ke Yan[2014]6+1 种基金National Natural Science Foundation of China,No.31460023Natural Science Foundation of Guangxi,No.2014GXNSFAA118206
文摘AIM: To investigate the inhibitory effects of emodin, baicalin, etc.on the hefA gene of multidrug resistance(MDR) in Helicobacter pylori(H.pylori).METHODS: The double dilution method was used to screen MDR H.pylori strains and determine the minimum inhibitory concentrations(MICs) of emodin, baicalin, schizandrin, berberine, clarithromycin, metronidazole, tetracycline, amoxicillin and levofloxacin against H.pylori strains.After the screened MDR stains were treated with emodin, baicalin, schizandrin or berberine at a 1/2 MIC concentration for 48 h, changes in MICs of amoxicillin, tetracycline, levofloxacin, metronidazole and clarithromycin were determined.MDR strains with reduced MICs of amoxicillin were selected to detect the hefA mR NA expression by realtime quantitative PCR.RESULTS: A total of four MDR H.pylori strains were screened.Treatment with emodin, baicalin, schizandrin and berberine significantly decreased the MICs of amoxicillin and tetracycline against some strains, decreased by 1 to 2 times, but did not significantly change the MICs of clarithromycin, levofloxacin, and metronidazole against MDR strains.In the majority of strains with reduced MICs of amoxicillin, hef A m RNA expression was decreased; one-way ANOVA(SPSS 12.0) used for comparative analysis, P < 0.05.CONCLUSION: Emodin, baicalin, schizandrin and berberine significantly decreased the MICs of amoxicillin and tetracycline against some H.pylori strains, possibly by mechanisms associated with decreasing hefA mR NA expression.
基金Supported by Key Laboratory Cultivation Base of Universities in Guangxi(Guangxi Education Research)No.[2014] 6
文摘AIM To reveal the protective mechanism of the combined use of vitamin D and puerarin in the progression of hepatic fibrosis induced by carbon tetrachloride(CCl4).METHODS Eight-week-old male Wistar rats were randomly divided into a normal control group(C group), a CCl4 group(CCl4 group), a vitamin D group(V group), a puerarin group(P group), and a combined group of vitamin D and puerarin(V + P group), each of which contained ten rats. In this way, we built a rat model of CCl4-induced hepatic fibrosis with intervention by vitamin D, puerarin, or a combination of the two. After eight weeks, the mice were sacrificed to collect serum and liver specimens. Blood was collected to detect the hyaluronic acid(HA). We also measured hydroxyproline(Hyp) and prepared paraffin sections of liver. After Sirius red staining, the liver specimens were observed under a microscope. RT-PCR and western blot analysis were adopted to detect the mRNA and the proteinlevels of Collagen I, Collagen III, Wnt1, and β-catenin in the liver tissues, respectively.RESULTS Hepatic fibrosis was observed in the CCl4 group. In comparison, hepatic fibrosis was attenuated in the V, P, and V + P groups: the HA level in blood and the Hyp level in liver were reduced, and the mRNA levels of Collagen I, Collagen III, Wnt, and β-catenin in liver were also decreased, as well as the protein levels of Wnt1 and β-catenin. Among these groups, the V + P group demonstrated the greatest amelioration of hepatic fibrosis.CONCLUSION The combined application of vitamin D and puerarin is capable of alleviating CCl4-induced hepatic fibrosis of rats. As to the mechanism, it is probably because the combined use is able to silence the Wnt1/β-catenin pathway, suppress the activation of hepatic stellate cells, and reduce the secretion of collagen fibers, therefore improving the anti-hepatic fibrosis effect.
基金the Guangxi Key Disciplines(Pathogen Biology)[2013]16,Key Laboratory Cultivation Base of Universities in Guangxi(Guangxi Education Research[2014]6)the Science and Technology Research Projects of Universities in Guangxi in 2014,No.YB2014307+1 种基金the Guangxi Natural Science Fund Project,No.2013GXNSFAA019249,No.2014GXNSFBA118148the Scientific Research Project of The Department of Education of Guangxi Zhuang Autonomous Region,No.200810LX327
文摘AIM To explore the induction effects and mechanism of Solanum lyratum Thumb(ST) on human hepatocellularcarcinoma SMMC-7721 cells through the mitochondrial pathway.METHODS The experiments were conducted on three groups: an experimental group (with ST ethanol extracts' concentration being 2.5, 5 and 10 mg/L), a negative control group (with only nutrient solution, 0 mg/L ST ethanol extracts), and a positive control group (2.5 mg/L DDP). The inhibition rate of cell proliferation was checked by using the methyl thiazolyl tetrazolium method, and cell apoptosis was tested by TUNEL method. Furthermore, RT-PCR was used to examine m RNA expression of Fas, Fas L, caspase-8, caspase-3, p53 and Bcl-2 genes.RESULTS Compared with the negative control group, the inhibition and apoptosis rates of the experimental group with different concentrations of ST extracts on human hepatocellular carcinoma SMMC-7721 cells significantly increased(P<0.05). Besides, the m RNA expression of Fas L and Bcl-2 significantly decreased(P<0.05) while the m RNA expression of Fas, caspase-8, caspase-3 and p53 increased significantly. When compared with the positive control group, the experimental groups with 5 mg/L ST ethanol extracts showed effects similar to the positive control group.CONCLUSION ST ethanol extracts induced the apoptosis of hepatocellular carcinoma SMMC-7721 cells through up-regulated Fas, caspase-8, caspse-3 and p53, and down-regulated Fas L and Bcl-2 in the mitochondrial pathway.
基金Supported by Nature Science Foundation of Guangxi,No.2012GXNSFAA053172The School to School and Enterprise to build the innovation platform in 2013,Guangxi Scientific Research,No.2013-8
文摘AIM: To investigate the rate of Helicobacter pylori (H. pylori) resistance to clarithromycin among ethnic minority patients in Guangxi, explore the underlying mechanisms, and analyze factors influencing genotype distribution of H. pylori isolates.
基金National Natural Science Foundation of China,No.81760739 and No.32060018.
文摘Helicobacter pylori(H.pylori)has a high rate of infection and antibiotic resistance and poses a serious threat to human life.One of the main strategies to overcome drug resistance is to develop new treatment plans.Traditional Chinese medicine(TCM)that is commonly used to treat many diseases in China can reduce drug resistance and increase the eradication rate of H.pylori.In this paper,we review the research progress on TCM in the treatment of H.pylori infection.The mechanism of action of TCM is reviewed and research and applications of TCM in the treatment of H.pylori are demonstrated.Finally,we discuss problems confronting the use of TCM for the treatment of H.pylori infection and propose possible solutions.In addition,the plans of TCM in H.pylori treatment were also screened:Dampness-heat syndrome in the spleen and stomach,deficiency of spleen and stomach,and cold-heat complicated syndrome,and the effective components therein are studied.The antibacterial effect of TCM is relatively slow;for rapid improvement of the treatment effect of refractory H.pylori gastritis,we provide an appropriate treatment regime combining TCM and Western medicine with immune-regulatory and synergistic antibacterial effects.
基金Supported by National Natural Science Foundation of China,No.31460023Natural Science Foundation of Guangxi,No.2014GXNSFAA118206+2 种基金Guangxi Key Discipline Fund(Pathogenic Microbiology)No.[2013]16Key Laboratory Fund of Colleges and Universities in Guangxi,No.Gui Jiao Ke Yan[2014]6
文摘Helicobacter pylori(H. pylori) is a kind of chronic infectious pathogen which can cause chronic gastritis, peptic ulcer, gastric cancer and other diseases. The genetic structure of the pathogenic genes of H. pylori varies largely, which contributes to the differences in virulence among various strains, and in clinical symptoms. Virulence genes of H. pylori can be categorized into three main classes: those related to adhesion and colonization, those related to gastric mucosal injury, and others. This review focuses on the relationship between genetic polymorphisms of the three classes of virulence genes of H. pylori and diseases. Most of the genetic polymorphisms of the main virulence factors of H. pylori are summarized in this paper.
基金the Fourth Self-funded Projects of Baise Scientific Research and Technology Development Plan,No.20203402School-level Scientific Research Project of Youjiang Medical University for Nationalities,No.yy2021sk029.
文摘BACKGROUND At present,there is no ideal method to cure diabetes,and there are few reports on the treatment of diabetes with probiotics.AIM To propose a method for preparing a new type of chromium-and zinc-rich Acetobacter aceti(A.aceti)and explore its ability to enhance the hypoglycemic effects of probiotics in the treatment of diabetes.METHODS A.aceti was cultured in a liquid medium that contained chromium trichloride and zinc chloride,both at a concentration of 64 mg/mL,with the initial concentration of the bacterial solution 1×10^(4) CFU/mL.After the bacterial solution had been inducted for 48 h,the culture media was changed and the induction was repeated once.The levels of chromium and zinc in the bacteria were detected by inductively coupled plasma mass spectrometry,and the contents of NADH and glucose dehydrogenase were determined using an NAD/NADH kit and glucose dehydrogenase kit,respectively.Streptozotocin was used to establish a mouse model to evaluate the hypoglycemic effects of the proposed chromium-and zincrich A.aceti.Ten-times the therapeutic dose was administered to evaluate its biological safety.The effect on MIN6 islet cells was also assessed in vitro.RESULTS The levels of chromium metal,metallic zinc,NADH coenzyme,and glucose dehydrogenase in A.aceti prepared by this method were 28.58-34.34 mg/kg,5.35-7.52 mg/kg,5.13-7.26μM,and 446.812-567.138 U/g,respectively.The use of these bacteria resulted in a better hypoglycemic effect than metformin,promoting the repair of tissues and cells of pancreatic islets in vivo and facilitating the growth of MIN6 pancreatic islet cells and increasing insulin secretion in vitro.Ten-times the therapeutic dose of treatment was non-toxic to mice.CONCLUSION Chromium trichloride and zinc chloride can be employed to induce the preparation of chromiumand zinc-rich A.aceti,which can then promote the hypoglycemic effect found in normal A.aceti.The bacteria biotransforms the chromium and zinc in a way that could increase their safety as a treatment for diabetes.
