BACKGROUND: The problem of the high rate of acute restenosis at an early and advanced stage has been a hot spot, while the stent with paclitaxel (poly-L-lactide, PLLA/polyglycolic acid, PGA) degradable material will resolve it. OBJECTIVE: To seek an ideal biologic degradable material used in biologic degradable stent. DESIGN, TIME AND SETTING: The comparative cytological study was performed at the Laboratory of Toxicology, Institute of Public Health, Jilin University (Key Laboratory of Radiobiology of Ministry of Public Health of China, Key Laboratory of Toxicology of Jilin Province) from July 2003 to July 2005. MATERIALS: Paclitaxel degradable material (PLLA/PGA) (PLLA:PGA= 9: l ) were offered by Changchun Applied Chemistry Institute of Chinese Academy of Science). Human umbilical arterial smooth muscle cells (SMCs) were purchased from Boster, Wuhan, China. METHODS: The sixth passage of SMCs were digested by 0.25% Trypsin under ambient temperature for 3 minutes, incubated in 10 mL 10% ox serum BMEM, and made into SMC suspension. The materials kept in hypothermal disinfectant Co60 were heated to 37 ℃ by waterbath after surface treatment, and then placed in a 6-well culture plate. SMC suspension was added into the middle of the materials. The density of cells was about 5×106/cm2. Cell suspension diffused around the materials gradually. At last, 10% ox serum BMEM culture solution was added into it, and cultivated in a 5% CO2 incubator at 37 ℃. The growth of cells in and surrounding the materials was observed by inverted microscope everyday. MAIN OUCOME MEASURES: The materials were obtained after culture for 3, 6, 12, 19, 26, 34 days and vacuum dehydration, and were weighed. The weight loss of materials was compared before and after culture. The average degradable rate of materials was calculated.RESULTS: Degradable material had no influence on the development of SMCs. The average degradation rate ex vivo was 0.45% per day. CONCLUSION: PLLA/PGA with good cellular compatibility could be applied to intravascular stents.

Objective To investigate the clinical value of iTRAQ multiplex tandem mass spectrometry in the detection of the ex-pression of hepatocyte growth factor (HGF) in patients with invasive breast cancer .Methods A total of 35 patients with breast cancer and 30 healthy subjects were selected from January 2014 to October 2016 in this hospital ,the expression of serum HGF in breast cancer patients with different clinical stages and healthy subjects was analyzed by iTRAQ labeling ,mass spectrometry ,library searching and Scqffold software ,and the differential expression of HGF was verified by Western blot .Results A total of 237 pro-teins were identified in the serum samples of this study ,and 89 proteins with strict quantitative criteria ,17 differentially expressed proteins ,included HGF ,were screened for breast cancer patients and healthy controls .iTRAQ markers showed that the expression level of serum HGF in different clinical stage of breast cancer patients was significantly higher than that in healthy subjects (P<0 .05) .The results of Western blot showed that the relative expression level of serum HGF in breast cancer patients was significant-ly higher than that in healthy subjects(P<0 .05) .Conclusion iTRAQ multiplex tandem mass spectrometry is useful for the detection of breast cancer patients with high expression of HGF ,which is of great significance in guiding the clinical treatment of breast cancer .

Objective: To evaluate the intervention effects of response to heatwave in communities of four cities, China. Methods: Baseline survey on heatwave and climate change related knowledge, attitude and practice (KAP) was conducted in the pilot communities in Harbin, Nanjing, Shenzhen and Chongqing, using face-to-face questionnaire interview in November, 2011 to November, 2013. Finally, 1 604 residents were interviewed. Intervention measures were implemented in summers of 2013 and 2014, including delivering early warning information of heatwave health risk and launching health education and promotion. The second survey was conducted in same communities using the same questionnaire and sampling method as baseline survey in November, 2014, and 1 640 residents were interviewed. The Chi-square test was used to compare the demographic characteristics and KAP of community residents between before and after intervention, and the factors that affected the intervention effect were selected by logistic multiple stepwise regression model. Results: The age of the residents interviewed before and after intervention was (46.4 ± 15.5) years and (45.0 ± 15.9) years, respectively. Overall, the residents' awareness rates of heatwave before and after intervention were 70.5% (1 131/1 604) and 82.9% (1 359/1 640) (χ²=69.40, P<0.001). The rate of residents who had wished to receive early warning information increased 6.3% (χ²=41.11, P<0.001), which reached 94.6% (1 551/1 604) after intervention from 88.3% (1 416/1 604) in baseline survey. Both heatwave health risk early warning and health education had big impacts to residents. There were 92.7% (1 105 residents) among the 1 192 residents who had received the early warning information arrange work and rest time according to the early warning information and 93.0% (1 231 residents) among the 1 323 residents who knew about health education activities being conducted in community thought that the community health education activities had made active role in protecting health from heatwaves. After a series of intervention, male had a effect on attitude about hot wave than female in Nanjing and Chongqing, OR (95%CI) were 1.48(1.02-2.16) and 1.45 (1.18-2.05) , respectively; compared with subjects below primary school education, people with college degree or above had higer KAP in all cities (ORs range from 1.18 to 2.05), P<0.05; regular physical exercise (ORs range from 1.39 to 2.70) also had profound impacts on KAP in all cities (P<0.05). Conclusion s Early warning and health education were effective measures to enhance residents' response capacity to climate change.

Objective To understand the associations between extremely low and high air temperature and the years of life lost (YLL) due to diabetes deaths in Chongqing and Harbin with different climatic characteristics in China.Methods A double threshold B-spline distributed lag non-linear model (DLNM) was used to investigate the lag and cumulative effects of extremely low and high air temperature on YLL due to diabetes for lag 0-30 days by using the urban meteorological and diabetes mortality data of Chongqing (2011-2013) and Harbin (2008-2010).The effects were expressed as relative risk (RR).Results In Chongqing,the cold effects on YLL due to diabetes were delayed by four days and lasted for three days (lag4-6) with the highest RR of 1.304 (95％ CI:1.033-1.647) at lag5.The hot effects were delayed by one day (lagl) with RR of 1.321 (95％ CI:1.061-1.646).In Harbin,the extreme cold effects on YLL were delayed by four days and lasted for seven days (lag4-10) with the highest RR of 1.309 (95％CI:1.088-1.575) at lag6.The hot effects were delayed by one day and lasted for four days (lagl-4) with the highest RR of 1.460 (95％ CI:1.114-1.915) at lag2.The unit risk for cold and hot effects was 43.7％ (P=0.005 5) and 18.0％ (P=0.000 2) in Chongqing and 15.0％ (P=0.000 8) and 29.5％(P=0.001 2) in Harbin,respectively.Conclusions Both extremely low air temperature and extremely high air temperature might increase the years of life lost due to diabetes in cities with different climate characteristics.Health education about diabetes prevention should provide information about the effects of extreme weather events.

Abstract Allergic diseases can occur in all systems of the body, covering the whole life cycle, from children to adults and to old age, can be lifelong onset and even fatal in severe cases. Children account for the largest proportion of the victims of allergic disease, Children s allergies start from scratch, ranging from mild to severe, from less to more, from single to multiple systems and systemic performance, so the prevention and treatment of allergic diseases in children is of great importance, which can not only prevent high risk allergic conditions from developing into allergic diseases, but also further block the process of allergy. At present, there is no consensus on the management system of allergic children in kindergartens and primary schools. The "Consensus on Allergy Management and Prevention in Kindergartens and Primary Schools", which includes the organizational structure, system construction and management of allergic children, provides evidence informed recommendations for the long term comprehensive management of allergic children in kindergartens and primary schools, and provides a basis for the establishment of the prevention system for allergic children.