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Objective:To explore the relationship between intestinal flora disorder and intestinal barrier dysfunction in patients with sepsis.Methods:A prospective observational study was conducted to include 10 patients with sepsis (sepsis group) admitted to the ICU of General Hospital of Ningxia Medical University from February 2017 to June 2017, 10 normal postoperative patients (non-sepsis group) admitted to the ICU of General Hospital of Ningxia Medical University in the same period, and 10 healthy persons (control group) were served as controls. General information was recorded. Fecal samples of the three groups of experimental subjects were detected and analyzed by using 16S rRNA gene sequencing technology. The venous blood of the sepsis and non-sepsis groups were collected and the levels of D-lactic acid and bacterial endotoxin in were measured by enzymatic method at the corresponding time points. The correlation between the levels of D-lactic acid and bacterial endotoxin and intestinal flora of patients with sepsis was analyzed.Results:The change consistency of pathogenic bacteria between clinical infection and intestinal pathogenic bacteria in patients with sepsis was observed and analyzed. Sputum culture of patients with sepsis was Acinetobacter baumannii (corresponding patient number: S5, S6, S8), Stenotrophomonas maltophilia (corresponding patient number: S6, S7), and Enterococcus (corresponding patient number: S7). In the intestinal flora of corresponding patients, the OUT abundance were increased. Patients with sepsis (corresponding patient number S7) showed E. coli in blood culture, and in his intestinal flora the OUT abundance was increased. Correlation analysis showed that the serum D-lactic acid level was negatively correlated with the proportion of Firmicutes in intestinal flora in the non-sepsis and sepsis groups, while was positively correlated with the proportion of Firmicutes (r value: -0.532, 0.468, respectively, P<0.05). Conclusions:The gut microbiota dysbiosis is correlated with intestinal barrier function in sepsis patients with sepsis. The spread of pathogenic bacteria between clinical infection and intestinal bacteria in sepsis patients has potential consistency.
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Objective To investigate the effect of Lactobacillus plantarum(LP)on intestinal flora and bacterial translocation in mice with spontaneous inflammatory bowel disease(IBD). Methods Interleukin 10 knockout mice(IL-10~(-/-))were used as models of IBD.Eight-week old female mice were randomized to control group, IL-10~(-/-)group and IL-10~(-/-)+LP group.IL-10~(-/-)+LP group received 0.5 mL LP(1.0×10~9CFU/mL)per day for 4 weeks,and the other groups received 0.5 mL Ringer buffer.Intestinal flora including Bifidobacteria,Lactobacilli,Enterobacteriaceae and Clostridium perfringens in the feces and bacterial translocation in mesenteric lymph nodes and spleens were detected. Results The contents of Bifidobacteria and Lactobacilli significantly decreased in the intestine of IL-10~(-/-)mice,while those of Enterobacteriaceae and Clostridium perfringens significantly increased,and the bacterial translocation significantly increased.Four weeks after LP treatment, the disturbed intestinal flora was restored, and the bacterial translocation decreased. Conclusion LP administration can modulate the imbalance of intestinal flora and decrease the bacterial translocation,thus enhance intestinal barrier function in mice with IBD.