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Objective To investigate the clinical characteristics of bloodstream infections in obstetric patients and analyze the distribution and antimicrobial susceptibility of the pathogenic organisms. Methods The clinical data of bloodstream infections in obstetric patients treated in the Third Affiliated Hospital of Guangzhou Medical University from December 2014 to December 2017 were studied retrospectively. Results A total of 111 cases were identified, including 31(27.9％)during pregnancy and 80(72.1％)after delivery. Most(79.3％, 88/111)of these patients had obstetric disease or complication, and urinary, abdominal or intrauterine infection was found in 15(13.5％)cases. All patients had fever, and 7 cases showed septic shock. After treatment, 109(98.2％)patients were cured, despite infectious abortions in 6 cases. A total of 118 isolates were collected, including 31(26.3％)from pregnant women and 87(73.7％)isolates from puerperants. Gram-negative organisms, gram-positive organisms and Candia accounted for 58.5％, 39.0％, and 2.5％, respectively. The most common pathogens identified were Escherichia coli(44.1％), Enterococcus spp.(22.0％), and Staphylococcus spp.(5.1％). The prevalence of ESBLs-producing strains was 62.5％ in E. coli. All the E. coli strains were susceptible to piperacillin-tazobactam, imipenem, and tigecycline. No Enterococcus isolates were resistant to vancomycin or tigecycline. About 88.5％ of the Enterococcus strains were susceptible to ampicillin. Conclusions Bloodstream infection in obstetric patients usually occurs after delivery, probably resulting in septic shock or infectious abortion. The main pathogens are gram-negative bacteria and Enterococcus spp. The prevalence of ESBLs-producing strains was high in E. coli. Most of the Enterococcus strains were susceptible to ampicillin.
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Objective@#To investigate the key factor(s) of hepatitis B virus X protein (HBx) promoting B7-H6 gene activation.@*Methods@#The DNA fragments of the B7-H6 promoter were amplified from the human genomic DNA using polymerase chain reaction(PCR). Products of PCR were digested by KpnI and HindⅢ, and inserted into luciferase reporter vector (pGL3-Basic). The correctness of the recombinant plasmid pGL3-B7-H6 was confirmed by sequencing. Human hepatoma cell line HepG2 were co-transfected with pGL3-B7-H6 and the eukaryotic expression vectors (pCMV-HBs、pCMV-HBc and pCMV-HBx), and the relative luciferase activity was detected.The different dose of HBx expression plasmids were transfected into the HepG2 cells, and the expression of B7-H6 protein were determined by Western blot.@*Results@#A period of 2.2 Kb of B7-H6 promoter region were successfully cloned into pGL3-Basic, which was confirmed by DNA sequencing. The relative luciferase activity was significantly higher in the cells transfected with pGL3-B7-H6 than that in the cells transfected with the empty vector pGL3-Basic (5.24±1.25 vs. 1.12±0.31, P=0.005). The relative luciferase activity in HepG2 cells co-transfected with pGL3-B7-H6 and pCMV-HBx was remarkably increased compared with the control group (17.60±3.36 vs. 6.73±1.36, P=0.001). Western blot further demonstrated that HBx protein can significantly enhance B7-H6 protein expression.@*Conclusions@#Hepatitis B Virus X proteins enhanced B7-H6 promoter activity and promoted B7-H6 protein expression.
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BACKGROUND: Oral inflammatory diseases usually cause alveolar bone loss and odontoseisis, and further impact dental occlusion. Extracorporeal shock wave therapy (ESWT) is a promising method for the repair of alveolar bone and improving osteogenic activity of alveolar osteoblasts, but its therapeutic efficacy and related mechanisms remain unclear. OBJECTIVE: To compare the effect of different intensities of ESWT on the proliferation and osteogenesis abilities of rat alveolar osteoblasts. METHODS: The rat alveolar osteoblasts were obtained and cultured in vitro, and further identified by alkaline phosphatase staining. 0.18, 0.36, and 0.50 mJ/mm2 ESWT was used to stimulate the rat alveolar osteoblasts, 100 pulses, respectively. RESULTS AND CONCLUSION: The levels of alkaline phosphatase and bone morphogenetic protein 2 were significantly increased in the 0.36 and 0.18 mJ/mm2 ESWT groups, especially in the 0.36 mJ/mm2 ESWT group (P < 0.05). 0.50 mJ/mm2 ESWT significantly decreased the proliferation ability of rat alveolar osteoblasts and downregulated the levels of alkaline phosphatase and bone morphogenetic protein 2 (P < 0.05). To conclude, ESWT (< 0.36 mJ/mm2) can improve the osteogenesis ability of rat alveolar osteoblasts with the intensity increasing, which provides a theoretical basis for the clinical use of ESWT in the alveolar bone repair.
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Objective To investigate the serum levels and correlation between macrophage migration inhibitory factor (MIF) and regulated on activation normal T cell expressed and secreted cytokines (RANTES) in patients with chronic hepatitis B (CHB).Methods Forty-four CHB patients (CHB group)and 30 healthy controls (control group) were enrolled in this study.The venous blood was collected and serum MIF and RANTES levels were detected by enzyme-linked immunosorbent assay.Correlation between MIF and RANTES was analyzed in CHB group.Results The serum MIF and RANTES levels in CHB group were significantly higher than those in control group [(8.48 ± 1.70) μ g/L vs.(1.99 ± 2.38) μ g/L,(3.94 ±2.38) μ g/L vs.(0.33 ± 0.15) μ g/L,P =0.000].There was no correlation between MIF level and RANTES level(r =0.212,P＞ 0.05).Conclusions The serum MIF and RANTES levels are significantly increased in patients with CHB,but there is no correlation.The participation pathogenesis way of CHB is different.
