OBJECTIVE: To study airway reactivity and impulse oscillation (IOS)-measured airway resistance indicators of residents of Zhenhai industrial area in Ningbo city. METHOD: In the form of follow-up, both. airway reactivity and respiratory functions of populations in Zhenhai industrial zone (n = 215) and urban (n = 203) were measured, comparing difference degree between different regions. RESULT: Ninty-five of 215 cases in industrial area were identified as suspected airway hyperresponsiveness, but only 43 of 203 cases were in urban areas. Forty-seven of 95 cases (49.5%) in industrial zone were positive, while only 14 cases (32.6%) in urban. The proportions of people in the two regions on different types of airway hyperresponsiveness were significantly different (P < 0.01). All airway resistance indexes of urban populations were significantly lower than that of industrial zone (P < 0.05). CONCLUSION The prevalence of airway hyperresponsiveness and IOS airway resistance aspects of industrial area residents was higher than that of urban residents. Monitoring and evaluating the airway diseases, inflammatory lesions and respiratory function in the region were good for understanding the severe pollution in the local area in certain significance.
Air Pollution ; adverse effects ; Airway Resistance ; Cities ; Environment ; Humans ; Industry ; Oscillometry ; Respiratory Hypersensitivity ; physiopathology ; Respiratory System ; physiopathology

OBJECTIVE To construct Hep-2 cell line with stable transfection of siRNA-STAT3 gene, and to explore the relationship between STAT3 expressionand the pathogenesis of laryngeal cancer. METHODS Specific STAT3 oligonucleotides were designed and synthesized. These oligonucleotides were annealed form the double strands DNA fragments. Then the fragments were cloned into pGPU6/GFP/Neo vector. The recombinant PGPU6/GFP/Neo-siRNA-STAT3 plasmid was confirmed by enzyme digestion and sequence analysis at the same time. Positive clones were selected out by G418 and p-STAT3 expression was identified by Western-blot analysis. The growth curve of the Hep-2 cells was drawn based on MTT assay and the growth ability of single Hep-2 cell was measured according to the plate colony formation assay respectively. RESULTS PGPU6/GFP/NEO-siRNA-STAT3 expression vector was successfully constructed. Western-blot analysis identified that p-STAT3 expression declined obviously in siRNA- STAT3 group compared with that in negative control and blank group. The growth curve explained that the Hep-2 cells of siRNA-STAT3 group began to show obvious inhibitory effect until they were inoculated in the culture plate for 3 days(P =0.001).There were pronounced inhibitory effect after 5 days(P=0.000). The results also showed time-effect relationship of the inhibition. Furthermore, the cell colony formation rate of siRNA- STAT3 group was less than the negative control and blank group(P =0.000). CONCLUSION We successfully selected out Hep-2 cell line expressed siRNA-STAT3 gene stably and efficiently in this study. Down regulation of STAT3 correlated with the inhibition of growth of Hep-2 cells.

OBJECTIVE To study the roles of iron and zinc in the pathogenesis of recurrent tonsillitis and tonsillar hypertrophy.METHODS In total,40 patients who underwent a tonsillectomy to treat chronic tonsillitis or tonsillar hypertrophy were included in the study.Patients were divided into 2 groups,chronic tonsillitis or tonsillar hypertrophy group.The levels of iron and zinc elements were measured for each tonsillar tissue sample.RESULTS There was a significant difference in the iron and zinc level (P＜0.001) between the tonsillar hypertrophy and chronic tonsillitis groups.The levels of iron and zinc were significantly lower in the chronic tonsillitis group.CONCLUSION The results suggest that low tissue concentration of iron and zinc may lead to chronic tonsillitis.