Comparative study of CT and MR guided microwave ablation in the treatment of para-vascular VX2 liver tumor model in rabbits.

Objective： To analyze the efficacy of microwave ablation (MWA) guided by computed tomography (CT) and 1.5T magnetic resonance (MR) in the treatment of VX2 para-vascular liver tumor model in rabbits. Materials and Methods Sixty para-vascular VX2 liver tumor models in rabbits were randomly divided into CT-guided microwave ablation group (CT group, n=35) and MR-guided microwave ablation group (MR group, n=35). The complete ablation rate, mean operation time, postoperative complication rate and mean survival time were compared between the two groups. Results In the CT group, the rate of complete ablation was 68.6% (24/35), and the mean operation time was 42.1 ± 9.7 minutes. Three cases had ascites and one case had abdominal wall injury. In the MR group, the rate of complete ablation was 94.2% (33/35), and the mean operation time was 53.4 ± 10.9 minutes. One case was complicated with ascites. No serious complications such as pneumothorax, liver abscess, pleural effusion and diaphragm perforation were found in both groups. Between the two groups, the difference in complete ablation rate was statistically significant (P=0.006 ＜ 0.05). A statistically significant difference can also be found in mean operation time (P ＜ 0.01). The follow-up time was 21 days after the operation. As for the postoperative complication rate (11.4% in the CT group and 2.9% in the MR group, P=0.353) and mean survival time (16.9 ± 1.8 days in CT group, 18.3 ± 2.3 days in the MR group, P=0.925), the differences were not statistically significant. Conclusion Compared with CT guidance, although the microwave ablation time under MR guidance was longer, the complete ablation rate under MR guidance was high, which proved that MR guidance was a more effective way of microwave ablation guidance and was worth promoting in the clinic. In this experiment, the postoperative complication rate was lower in the MR group, although the difference was not statistically significant, which may be related to the small sample size, and the subsequent study on the postoperative complication rate can increase the sample content.

The role of environmental tobacco exposure and Helicobacter pylori infection in the risk of chronic tonsillitis in children.

CONTEXT AND OBJECTIVE:: Helicobacter pylori (H. pylori) is a chronic infectious pathogen with high prevalence. This study investigated the interaction between environmental tobacco exposure and H. pylori infection on the incidence of chronic tonsillitis in Chinese children. DESIGN AND SETTING:: Cross-sectional study performed in an outpatient clinic in China. METHODS:: Pediatric patients with chronic tonsillitis were enrolled. H. pylori infection was determined according to the presence of H. pylori CagA IgG antibodies. Serum cotinine levels and environmental tobacco smoke (ETS) exposure were determined for all participants. RESULTS:: There was no significant difference in H. pylori infection between the children with chronic tonsillitis and children free of disease, but there was a significant difference in ETS between the two groups (P = 0.011). We next studied the association between ETS and chronic tonsillitis based on H. pylori infection status. In the patients with H. pylori infection, there was a significant difference in ETS distribution between the chronic tonsillitis and control groups (P = 0.022). Taking the participants without ETS as the reference, multivariate logistic regression analysis showed that those with high ETS had higher susceptibility to chronic tonsillitis (adjusted OR = 2.33; 95% CI: 1.67-3.25; adjusted P < 0.001). However, among those without H. pylori infection, ETS did not predispose towards chronic tonsillitis. CONCLUSION:: Our findings suggest that tobacco exposure should be a putative mediator risk factor to chronic tonsillitis among children with H. pylori infection.

The role of environmental tobacco exposure and Helicobacter pylori infection in the risk of chronic tonsillitis in children / O papel da exposição ambiental do tabaco e infecção pelo Helicobacter pylori no risco de amigdalite crônica em crianças

ABSTRACT CONTEXT AND OBJECTIVE: Helicobacter pylori (H. pylori) is a chronic infectious pathogen with high prevalence. This study investigated the interaction between environmental tobacco exposure and H. pylori infection on the incidence of chronic tonsillitis in Chinese children. DESIGN AND SETTING: Cross-sectional study performed in an outpatient clinic in China. METHODS: Pediatric patients with chronic tonsillitis were enrolled. H. pylori infection was determined according to the presence of H. pylori CagA IgG antibodies. Serum cotinine levels and environmental tobacco smoke (ETS) exposure were determined for all participants. RESULTS: There was no significant difference in H. pylori infection between the children with chronic tonsillitis and children free of disease, but there was a significant difference in ETS between the two groups (P = 0.011). We next studied the association between ETS and chronic tonsillitis based on H. pylori infection status. In the patients with H. pylori infection, there was a significant difference in ETS distribution between the chronic tonsillitis and control groups (P = 0.022). Taking the participants without ETS as the reference, multivariate logistic regression analysis showed that those with high ETS had higher susceptibility to chronic tonsillitis (adjusted OR = 2.33; 95% CI: 1.67-3.25; adjusted P < 0.001). However, among those without H. pylori infection, ETS did not predispose towards chronic tonsillitis. CONCLUSION: Our findings suggest that tobacco exposure should be a putative mediator risk factor to chronic tonsillitis among children with H. pylori infection.

RESUMO CONTEXTO E OBJETIVO: Helicobacter pylori (H. pylori) é um patógeno infeccioso crônico com alta prevalência. Este estudo investigou a interação entre exposição à fumaça ambiental do tabaco (FAT) e infecção pelo H. pylori sobre a incidência de amigdalite crônica em crianças chinesas. TIPO DE ESTUDO E LOCAL: Estudo transversal desenvolvido num ambulatório na China. MÉTODOS: Pacientes pediátricos com amigdalite crônica foram recrutados. A infecção por H. pylori foi determinada segundo a presença de anticorpos H. pylori CagA IgG. Foi determinado o nível de cotinina sérica e exposição à FAT de todos os participantes. RESULTADOS: Não houve diferença significativa entre crianças com amigdalite crônica na infecção por H. pylori e sem amidalite, mas existia diferença significativa na FAT entre os dois grupos (P = 0,011). Em seguida, estudamos a associação entre FAT e amigdalite crônica com base no status de infecção por H. pylori. Nos pacientes com infecção por H. pylori, houve diferença significativa na distribuição de FAT entre os grupos de amigdalite crônica e controle (P = 0,022). Tomando os participantes sem FAT como referência, a análise de regressão logística multivariada mostrou que aqueles com alta FAT tinha maior susceptibilidade à amigdalite crônica (OR ajustado IC = 2,33, 95%: 1,67-3,25, ajustado P < 0,001). No entanto, naqueles sem infecção por H. pylori, a FAT não predispôs a amigdalite crônica. CONCLUSÃO: Nossos achados sugerem que a exposição ao tabaco é um fator de risco para amigdalite crônica em crianças com infecção por H. pylori.

Establishment of two-dimensional gelelectrophoresis technique for rabbit serum proteomics / 中国组织工程研究

BACKGROUND: Rabbit serum samples are widely used in basic researches, and two-dimensional gelelectrophoresis (2-DE) is the most classic technique for protein separation. Therefore, it is of great significance to establish a stable technique system of 2-DE for rabbit serum.OBJECTIVE: To establish a 2-DE technique system for rabbit serum protein separation. DESIGN, TIME AND SETTING: A single sample observational experiment was performed at Tianjin Key Laboratory of Biomarkers for Occupational and Environmental Hazard of Chinese People's Armed Police Forces Medical College from June to July in 2008. MATERIALS: Six healthy rabbits were provided by the Animal Experimental Center of Tangshan Vocational Technical College METHODS: Health rabbit serum was dissolved in rehydration sample loading buffer before and after eliminating high abundance proteins to make proteins in it schizolysis adequately. After reductive alkylation, the samples were loaded into the rehydration tray to undergo passive rehydration for 14 hours. Isoelectric focusing (IEF) electrophoresis was followed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). After sliver staining, the gel was analyzed by PDQuest7.4. MAIN OUTCOME MEASURES: ①Efficiency of eliminating high abundance proteins. ②Two-dimensional eleotrophoregrams (2-D electrophoregrams)RESULTS: Distinct 2-D eleotrophoregrems were obtained with high resolution and good reproducibility. The removal of high abundance proteins in serum failed to result in better 2-D electrophoregrams.CONCLUSION: We have successfully established a 2-DE technique for rabbit serum proteome, which can lay the foundation for the further study of serum proteomics of diseases.