Objective:To investigate the effect and mechanism of long non-coding RNA (lncRNA) taurine upregulated gene 1 (TUG1) on the radiosensitivity of cervical cancer cells by regulating autophagy.Methods:The radioresistant cervical cancer cell lines HeLa/IR and SiHa/IR were constructed. The radiosensitivity of HeLa/IR and SiHa/IR cells was evaluated by colony formation assay. Real-time reverse transcription PCR (RT-qPCR) was used to detect the expression of lncRNA TUG1 in each group. Western blot was used to detect the expression of autophagy proteins including Beclin1, microtubule-associated protein1 light chain 3 (LC3)Ⅱ/LC3Ⅰ and p62 in each group. NC-siRNA, TUG1-siRNA, TUG1-siRNA combined with rapamycin (an autophagy activator) were transfected into HeLa/IR and SiHa/IR cells, which were named as NC-siRNA group, TUG1-siRNA group and TUG1-siRNA+rapamycin group, respectively. RT-qPCR was used to evaluate the transfection efficiency of lncRNA TUG1. Western blot was used to assess the effect of lncRNA TUG1 silencing on autophagy protein expression. Flow cytometry was employed to evaluate the effect of lncRNA TUG1 silencing on the proliferation and apoptosis of HeLa/IR and SiHa/IR cells, respectively. The differences between two groups were analyzed by t-test, and the comparison among multiple groups was conducted by one-way analysis of variance. Results:Compared with HeLa and SiHa cells, the survival fractions of HeLa/IR and SiHa/IR cells was significantly increased, the expression of lncRNA TUG1 in cells was significantly increased, the expression levels of autophagy proteins Beclin1 and LC3Ⅱ/LC3Ⅰ were significantly increased, and the expression of p62 protein was significantly decreased, and the differences were statistically significant (all P<0. 05). Compared with the NC-siRNA group, the expression of lncRNA TUG1 and cell viability in HeLa/IR and SiHa/IR cells in the TUG1-siRNA group were significantly decreased, the apoptosis rate was significantly increased, the expression levels of Beclin1 and LC3Ⅱ/LC3Ⅰ proteins were significantly decreased, and the expression of p62 protein was significantly increased, and the differences were statistically significant (all P<0. 05). Compared with the TUG1-siRNA group, the expression levels of Beclin1 and LC3Ⅱ/LC3Ⅰ proteins in HeLa/IR cells in the TUG1-siRNA+rapamycin group were significantly increased, the expression of p62 protein was significantly decreased, the cell viability was significantly decreased, and the apoptosis rate was significantly increased, and the differences were statistically significant (all P<0.05). Conclusion:Silencing lncRNA TUG1 can enhance the radiosensitivity of cervical cancer cells by regulating autophagy.

Objective: To make a quantitative evaluation on the short term effect of particulate matter with aerodynamic diameter no more than 2.5 μm (PM_2.5) on cumulative excess mortality rate (CER) and years of life lost (YLL) in residents in Changping district of Beijing. Methods: The death data in local residents, daily mortality, meteorology data and air pollution data (PM_2.5, SO₂ and NO₂ concentrations) in Changping from 2014 to 2017 were collected. Distributed lag non-linear model was used to assess the age and gender specific cumulative lag effects of PM_2.5 on cardiovascular CER and daily YLL in Changping. Results: The effects of PM_2.5 on cardiovascular CER and YLL were obvious on lag 7 days and lag 9 days, respectively, peaking on day 14, and lasting for 21 days. On lag0-21 days, for a 10 μg/m³ increase in PM_2.5, the population based CER of cardiovascular disease death was 0.021% (95%CI: 0.004%-0.038%), and the YLL was 1.47 (95%CI: 0.23-2.70) years. Greater PM_2.5 effect were observed in males and the elderly. Conclusion PM_2.5 increased the risk of cardiovascular disease death and YLL.

Objective: To analyze the pathogenic surveillance programs and related factors on bacillary dysentery in Beijing, 2008-2017, to provide evidence for the practices of diagnosis, treatment and prevention of the disease. Methods: Analysis was conducted on surveillance data of bacillary dysentery, collected from the surveillance areas of national bacillary dysentery in Beijing. Shigella positive rate of stool samples were used as the gold standard while detection rate of Shigella, diagnostic accordance rate and resistance were computed on data from the surveillance programs. Chi-square test was used to compare the rates and unconditional logistic regression was used to analyze the related factors of Shigella infection. Results: Both the reported incidence rate on bacillary dysentery and detection rate of Shigella in diarrhea patients showed significantly decreasing trend, from 2008 to 2017. The accordance rate of bacillary dysentery was only 7.80% (111/1 423). Shigella sonnei was the most frequently isolated strain (73.95%, 159/215) followed by Shigella flexnery. Results from the multivariate logistic regression of Shigella positive rate revealed that among those patients who were routine test of stool positive vs. routine test of stool positive (OR=1.863, 95%CI: 1.402-2.475), onset from July to October vs. other months'time (OR=7.271, 95%CI: 4.514-11.709) temperature ≥38 ℃vs. temperature <38 ℃(OR=4.516, 95%CI: 3.369-6.053) and age from 6 to 59 years old vs. other ages (OR=1.617, 95%CI: 1.085-2.410), presenting higher positive detection rates of Shigella from the stool tests. The resistant rates on ampicillin and nalidixic acid were 97.57% (201/206) and 94.90% (186/196), both higher than on other antibiotics. The resistant rates on ciprofloxacin (16.33%, 32/196), ofloxacin (9.57%, 11/115) and on amoxilin (15.05%, 31/206) were relatively low. The resistant rate appeared higher on Shigella flexnery than on Shigella sonnei. The proportion of strains with resistance on 3 more drugs, was 30.00%(21/70). Conclusions: The diagnostic accordance rate of bacillary dysentery in Beijing was low, with severe resistance of Shigella. Our findings suggested that clinicians should take multiple factors into account in their practices about epidemiological history, clinical symptom and testing results for diarrhea patients.
Adolescent ; Adult ; Anti-Bacterial Agents/therapeutic use* ; Beijing/epidemiology* ; Child ; China/epidemiology* ; Dysentery, Bacillary/prevention & control* ; Feces/microbiology* ; Humans ; Middle Aged ; Population Surveillance/methods* ; Sentinel Surveillance ; Shigella/isolation & purification* ; Shigella flexneri/isolation & purification* ; Shigella sonnei/isolation & purification* ; Young Adult

Objective To investigate the clinical features of SAPHO syndrome.Methods Clinical data of 22 cases of SAPHO syndrome were analysed.Results There were 7 males and 15 females among the 22 patients.The average age at onset of cutaneous and osteoarticular lesions was 45 years and 44 years, respectively.Of the 22 patients,21 had palmoplantar pustulosis and 1 had acne fulminans.Anterior chest wall (ACW) was involved in 19 patients,peripheral joints in 4 patients and sacroiliac joints in 2 patients.Osteoarticular manifestations occurred prior to the onset of skin lesions in 10 cases.after that in 9 cases,and simultaneously in 3 cases.The mean interval between the onset of cntaneous and osteoarticular lesions was 2.7 years and the longest interval was 20 years.Conclusions Middle-aged females predominate in patients with SAPHO syndrome seen in dermatological clinics.Palmoplantar pustulosis and ACW involvement are the most common clinical manifestations of SAPHO syndrome.