Objective To analyze the influence of ionizing radiation on the viability of the regulatory T cells and the relationship between the expression of CD39 and apoptosis related factors in mice Treg cells.Methods Mice were administered to whole body irradiation with 2 Gy of γ-rays,then lymphocytes were separated from thymus and spleen.The percentages of CD4 + T and CD4 + FOXP3 +CD25 + Treg lymphocytes,apoptosis related genes of Bax,Bcl-2 and CD39 were analyzed with FACS.Results Treg cells had a higher survival fraction than CD4 + FOXP3-Tcon cells after irradiation,and the time-responses of Treg cells in thymus and spleen were different.The apoptosis rate of Treg cells increased at 4 d after irradiation(t =-3.6,-7.4,P ＜0.05).The Bax/Bcl-2 ratio and the CD39 expression were increased in thymus Treg cells (t =-3.4,-6.6,P ＜ 0.05),but decreased in spleen Treg cells (t =2.4,2.6,P ＜0.05).Conclusions Thechanges of apoptosis and Bax/Bcl-2 are in consistent with the expression of CD39 in the irradiated Treg cells.

Objective To identify the differentially expressed microRNAs in the early transformed cells,the late transformed cells and their parental BEP2D cells.Methods The differentially expressed microRNAs in the above cells were identified by microRNAs microarray assay.Results There were 38differentially expressed microRNAs in R15H20 cells versus BEP2D cells,with 18 upregulated and 20downregulated microRNAs.R15H20 and RHT35 cells shared 25 differentially expressed microRNAs compared with BEP2D cells,with 15 down-regulated and 10 up-regulated microRNAs.There were 87differentially expressed microRNAs in RHT35 cells versus BEP2D cells,with 47 upregulated and 40 downregulated microRNAs.There were 38 differentially expressed microRNAs in RHT35 cells versus R15H20 cells with 20 upregulated and 18 downregulated microRNAs.Conclusions microRNAs are differentially expressed in the different stages of carcinogenesis of BEP2D cells induced by α particles,which suggests that microRNAs may play an important role in α particle-induced malignant transformation of BEP2D cells.

Objective To investigate 60Co γ-ray induced damage in lymphocytes and the relationship between doses of 60Co γ-ray irradiation and the levels of phosphorylated H2AX and ATM.Methods Cells were irradiated with 60Co γ-rays in the range of 0-8 Gy.The levels of phosphorylated H2AX and ATM were detected by Western blot and FACScan,respectively.The micronucleus(MN)was analyzed by CB method to evaluate DNA damage.Results FACScan results showed the dose-effect relationship of γ-H2AX expression were linear.square at 0.5 h post-irradiation to different doses,and the fitting curve was shown as Y=3.96+11.29D-0.45D2.The level of phosphorylated ATM(p-ATM)was not changed significantly by using the same method.Western blot showed that p-ATM protein expression was significandy increased after irradiation compared with sham.irradiated group.The MN assay which represented DNA damage was sensitive to different doses.Conclusions γ-ray irradiation could induce the phosphorylation of H2AX and ATM,which may play an important role in indicating DNA damage.Both of H2AX and ATM have the potential as sensitive biomarker and biodosimeter for radiation damage.

Objective To investigate the effects of 60Co γ-ray partial radiation on chromosome aberration in human peripheral blood in vitro.Methods The samples of heparinized peripheral whole blood from 3 healthy persons were exposed to 60Co γ-rays at the doses between 0 and 8 Gy with the dose rate of 0.35 Gy/min at the temperature of 37 ℃ ,and then mixed with the unirradiated blood samples of the Microscopy was used to observe the chromosome aberration double ( centromere + centromere) and the biological dose was estimated thereby.ResultsThe amounts of double centromere + centromere were increased along with the dose of irradiation in all groups.The estimated biological dose was higher than the 1/3 of the irradiation dose when the dose was between 0.5 to 2 Gy,and was close to the 1/3 of the irradiation dose when the dose was between 4 to 8 Gy.Conclusion Chromosome aberration can be used as a biomarker in estimation of uneven irradiation.

Objective To analyze the effect of high quality nursing in gastroscopy examination. Method 1 300 pa﹣tients underwent gastroscopy from March 2014 to June 2014 were randomly divided to control group (n= 650) and intervention group (n= 650). Patients in control group received routine nursing, and patients in intervention group received high quality nursing intervention besides the routine nursing. Patients anxiety level, open state of esophageal meatus, one-time intubation success rate, and time-consumed in gastroscopy of the two groups were compared. Result Anxiety score between the two groups at the time of reservation was not statistically significant (P> 0.05), anxiety scores of the intervention group (31.40 ± 4.20) was lower than that of control group before gas﹣troscopy, and the difference was statistically significant (P<0.01). Open rate of esophageal meatus, one-time intuba﹣tion success rate, and time-consumed in gastroscopy of the intervention group (97.1%, 95.1%and 4.52 ± 1.23 min) were significantly better than those of the control group (79.4%, 82.3%and 5.42 ± 1.53 min). Conclusion The high quality nursing in gastroscopy can alleviate the anxiety level of patients, improve the success rate of gastroscopy, re﹣duce the pain of patients, and it is worthy of clinical promoting.

Objective To investigate the effect of budesonide in the treatment of COPD and nursing intervention. Methods 200 cases of COPD patients in our hospital during the period from January 2015 to December 2016 as the object of this study, all patients were randomly divided into control group and study group, 100 patients in each group. The control group the patients using conventional methods of treatment, patients in the study group is to use budesonide treatment on the basis of conventional treatment, while giving appropriate nursing intervention were observed and compared. Results The study group patients in the treatment of lung function improvement after (P<0.05); the average hospitalization time and cough symptoms time were significantly better than the control group, and the difference is significant; the study group after nursing intervention, nursing satisfaction of patients was significantly higher than control group (P<0.05). Conclusion The use of budesonide and implement corresponding nursing intervention on the patients with COPD were treated with remarkable effect, the clinical symptoms of the patients were obviously relieved, can improve the patients' recovery and quality of life.

Objective To investigate the levels and distribution of radon concentrations in groundwater in some representative cities in China,and estimate the effective dose from inhaled radon released from domestic groundwater.Methods A total of 12 cities in 7 provinces (municipalities) were selected,including Beijing,Inner Mongolia,Ningxia,Shaanxi,Henan,Liaoning and Heilongjiang.In total,73 water samples from groundwater supply were taken.Radon concentrations in water samples were determined by using a continuous radon monitor with air-water exchanger.Results The average radon content in groundwater for drinking was 11.8 Bq/L in 12 cities in 7 provinces,ranging from 1.0 to 63.8 Bq/L.The radon concentrations in 37％ water samples exceeded 1 1.1 Bq/L,the safe limit recommended for drinking water by the United States Environmental Protection Agency (EPA).The radon contents in all of the water samples was lower than the reference level 100 Bq/L recommended by World Health Organization (WHO).The average annual effective dose arising from inhaled radon released from groundwater was 29 μSv (2.4 to 160 μSv).Conclusions Generally,the effective dose from inhaled radon released from groundwater is negligibly low.However,in some areas dominated by granite bedrock,the dose contribution from radon released from groundwater to residents should be routinely monitored.

With ever-increasing knowledge of biomechanics and anatomy of pelvis,more and more findings have been made on the integrated sacroiliac joint system.The sacroiliac complex plays a very important role i n the functions of pelvis due to its specia l biomechanical features.The sacro iliac screw internal fixation is bio mechanically superior to other fixation methods.[

Objective To explore the effect of radon and its progeny on the expression and mutations of p53 in lung tissue of mouse model. Methods Apoptosis was detected by terminal deoxynucleotidy transferase-mediated dUTP-biotin nick end labeling. The expression of p53 gene was analyzed by immunohistochemistry, Western blot and realtime-PCR. PCR-SSCP was used to detect the mutation of p53 in lung tissues. Results Compared with those in the control group, the apoptotic index were increased significantly in 30 WLM and 60 WLM groups( t = 18.11, -10.30,P ＜ 0.05 ). The p53 protein was increased significantly ( t = -11.08, P ＜ 0.05; t = - 7.00, P ＜ 0.0 ) ) in 30 WLM and 60 WLM groups. The mutation of p53 gene was not detected in lungs of radon-exposure mice. Conclusions Lung and bronchus might be the targets of radon and its progeny, and p53 gene plays an important role in the progression of radon-induced lung injury.

Objective To explore the correlations of expressions of gastric mucosa water channel aquaporin AQP3 and AQP4 and different gastritis types. Methods The gastric mucosa was mounted under gastroscope. The types of gastric mucosa pathology and activity were tested by the common pathohistology. The expressions of AQP3 and AQP4 were determined by immunohistology. Results The expressions of AQP3 and AQP4 of chronic superficial gastritis were significantly higher than those in the non-gastritis group and chronic atrophic gastritis group (P < 0.01), especially in the activity period of chronic superficial gastritis. The expressions of AQP3 and AQP4 of chronic atrophic gastritis group were reduced when compared to those in the non-gastritis group, in spite of no statistical differences between them. While compared to the non-gastritis group , the expression of AQP3 of chronic atrophic gastritis group during the active stage was remarkably decreased (P < 0.05). Conclusion The expressions of AQP3 and AQP4 of gastric mucosa in chronic gastritis in various pathological types are different. AQP3 and AQP4 may be the targeted point , which could be used for the differential diagnosis and treatment of chronic gastritis of different pathological types.