Objective To investigate non gonococcal urethritis mycoplasma and chlamydia infection and drug sensitivity status.Methods From June 2014 to December 2014,120 cases of non gonococcal urethritis patients in our hospital were given chlamydia trachomatis,ureaplasma,mycoplasma detection and mycoplasma culture and drug sensitivity test of mycoplasma.Mycoplasma and chlamydia test results were compared between male and female patients.Positive drug sensitivity test results of ureaplasma urealyticum (Uu) and mycoplasma hominis (Mh) were observed.Results Among the 120 patients with positive detection,the proportion of Uu was the highest,up to 41.67％ (50/120);the second was Mh,accounting for 31.67％ (38/120).The detection rate of Uu in women (57.14％)was significantly higher than that in males (28.13％),and the difference was statistically significant (x2 =10.35,P ＜ 0.05).The susceptibility of mycoplasma to pristinamycin susceptible rate highest,Uu and type mycoplasma reached 100.00％;followed by doxycycline,the susceptibility of Uu reached 98.00％ and the susceptibility of Mh to 100.00％;sensitive rates of Uu and Mh to josamycin were 96.00％ and 90.48％.The sensitive rates of Uu and Mh to tetracycline were 92.00％ and 90.48％ respectively.Conclusion The mycoplasma infection was mainly caused by Uu.Clinical treatment of mycoplasma infection can be based on the drug sensitivity test results to reasonably choose antibiotics,and sensitive rates of pristinamycin,doxycycline were higher.

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.

BACKGROUND: There are differences in physical and biological activity between the antibody from mammals and egg yolk antibody (IgY) from chicken. IgY is acid- and heat-resistant, and can prevent and cure the infectious diseases in animals and human being, which is also benefit to develop routine diagnostic immunoassays. Conventional ELISA assay for IgY takes much more time than dot-immunobinding assay.OBJECTIVE: To detect the IgY stability byusing dot-immunobinding assay.DESIGN: Open trail.SETTING: Department of Transfusion, Kunming General Hospital of Chinese PLA.MATERTALS: The experiment was completed in the Kunming General Hospital of Chengdu Military Area Command of Chinese PLA from January to June 2006. Two White Leghorn hens (30 weeks old) were selected. HLA-A*0201 α chain served as the antigen. The total protein concentration of the purified antigen was 0.04 g/L with the molecular mass of 32 000(self-prepared); nitrocellulose filter (NC, import and divided); nonfat dry milk (Anyi Corp. No. 20051220); DAB (Boshide Corp.);caprylic acid (made by Shanghai Xinghuo Chemical Factory); ammonium sulfate (Shantou Guanghua Chemical product).METHODS: ①HLA-A*0201 α chain with the total protein concentration of 0.04 g/L was purified with egg yolk antibody,and identified by SDS-PAGE. ②1 μL antigen was spotted into the center of NC membrane and dried in the incubator at 37 ℃. Then the NC membrane was blocked in 1 mL PBST and put in the incubator at 37℃ with shaking in 90 r per minute for 15 minutes. Then the liquid was exchanged with 1 mL PBST and added the primary antibody at a final concentration of 10 mg/L. After 30 minutes shaking in the incubator at 37 ℃, the NC membrane was washed in PBST for three times. The second antibody, mouse anti-chicken IgY conjugated to horseradish peroxidase (HRP) was added and after 30 minutes incubation, the NC membrane was washed three times in PBST. Binding was revealed by incubation with a DAB reagent. A positive reaction was represented by adeep brown spot,Irdlcating that IgY had better activity; if the spot became lighter IgY lost part activity, and when the spot disappeared, the IgY lost a the activty.According to intensity (gray degree)of the dot compared tothe standard, the remained percent of activity of the IgY was calculated. ③IgY was adjusted to three different protein concentrations with PBS: 1, 0.1, 0.01 g/L and stayed at room temperature for four months. 10 μg lgY was taken out from each concentration sample every month to detect the activity by dot-immunobinding assay. ④IgY was put into seven EP tubes with 100 μL per tube and numbered 1-7. Number 1 to 3 was adjusted pH to 5, 3 and 2, respectively with 1 mol/L HCI; Number 4 to 6 was to 9, 11 and 12, respectively with 1 mol/L NaOH. The pH of number 7 was neutral without adding acid or base. The samples were stayed in incubator at 37 ℃ for 3 hours. 10 μg IgY from each tube was taken every hour to detect the stability at different pH by dot-immunobinding assay. ⑤IgY was added to six EP tubes (10 μL per tube) and numbered 1-6. Number 1-6 was put into waterbath at 30, 40, 50, 60, 70 and 80 ℃ for 15 minutes. After cooled in refrigerator at 4 ℃, 10 mg samples from each tube and standard sample (untreated sample) taken to check the thermal stability by dot-immunobinding assay.MAIN OUTCOME MEASURES: ①SDS-PAGE of IgY. ②IgY stability at room temperature. ③IgY stability at different pH. ④ Detection of IgY thermal stability.RESULTS: ①Purified IgY after SDS-PAGE had two major binds, the molecular mass of the heavy chain was 66.000,and the light chain was 25 000. ②1, 0.1, 0.01 g/L IgY still had partial activity after staying at room temperature for four months. ③When pH ranged from 5 to 9, IgY still had partial activity after staying in 37 ℃ for 3 hours. If pH was lower than 5 or higher than 9, it lost the whole activity in above condition. ④Purified IgY was added to six EP tubes, the number 1-4 still had partial activity, but number 5 and 6 showed some white precipitate, which was caused by protein denaturation at higher temperature.CONCLUSION: IgY stability is higher than others. The dot-immunobinding assay described a rapid and simple method for the demonstration and characterization of functional activity of egg yolk antibody. With only small volume antigen and antibody, and specific dot, the dot-immunobinding assay method could process many samples at the same time.

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 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 analyze the chromosome aberrations induced by partial radiation in human peripheral blood lymphocytes in vitro.Methods Heparinized whole blood samples were exposed to 2 Gy ~(60)Co 7-rays at 37℃ ,and then mixed with non-irradiated blood by different ratio.The slides were prepared after culturing and the unstable aberrations were analyzed.Results The chromosome aberrations had a good relationship with the ratio of irradiated blood.The chromosome aberrations in partial irradiated group were higher than that in the irradiated group.The estimated dose was 1.27 Gy when the ratio was 1 : 1 ,greater than the dose of 1 Gy.The estimated dose was 0.93 Gy when the ratio was 0.5＝1,also greater than 0.5 Gy.But when the ratio was 1:0,the radiation dose was accordant with the estimated dose.Conclusions Chromosome aberrations could be a biomarker for estimating the uneven irradiation.

Objective To explore the role of γ-synuclein(SNCG) siRNA in the radiosensitivity of breast cancer T47D cells.Methods SNCG siRNA was synthesized according to the coding sequence of SNCG mRNA and then transiently transferred into T 47D cell with lipofectamine .The expression of SNCG gene and protein was detected by RT-PCR and Western-blot, respectively.Cells were divided into three groups, SNCG siRNA interference group , negative control group and blank control group , which were irradiated with different doses of 60 Coγ-rays.Cell radiosensitivity was evaluated by colony formation assay , cell proliferation was assayed by CCK-8 kit, and the protein expressions of phosphorylated-AKT and mTOR were detected by Western blot assay .Results Compared with blank control cells , the expressions of SNCG gene and protein in the SNCG siRNA transferred T 47D cells were efficiently diminished .Cell colony formation results showed that , under 4, 6, 8 Gy irradiation, the cell survival of siRNA transfection group was lower than that of control group (t=5.449, 8.882, 21.503, P<0.05).CCK-8 experiments showed that the cell proliferation abilities of siRNA group at 24, 48, 72 h after 6 Gy irradiation were lower than those of control group (t=5.603, 4.839, 6.115, P<0.05).In addition, after 6 Gy irraddaition, the AKT and mTOR phosphorylation levels in the siRNA group were more obviously reduced compared with blank groups , but the total AKT and mTOR had no changes .Conclusions Transfection of SNCG siRNA can enhance the radiosensitivity of breast cancer cells probably by inhibiting p -AKT signal pathway .

Hospital Research Branch to provide diversity of services should rely on a combination of different professionals composite research management department.This paper analyzes the current status of the hospital research management staff proposed the formation of complex multifunctional research subjects and their personnel training programs,and the staff have made short-term and long-term co-ordination of running countermeasures,as well as multi functional management functions method.

Objective To investigate the expressions of lung cancer related genes and miRNA in peripheral blood of the residents surrounding the extremely high radon hot springs in Ruoergai County,Sichuan Province. Methods Peripheral blood samples were collected from the local residents.Expressions of lung cancer related genes (p53,k-ras) and miRNA (let-7a,miR-34a/b) were detected by real-time PCR and the protein expressions of p53 and k-ras were detected by Western blot.Results The expressions of p53 and k-ras mRNA of the residents in high radon area were 0.97 and 1.33 times of the control respectively (t =0.13,-1.12,P ＞0.05),and the p53 and k-ras protein levels were 0.70 and 1.23 times of the control respectively (t =0.72,0.46,P ＞ 0.05).The let-7a of the residents in high radon area was lower (t =1.63,P ＞ 0.05 ) while the miR-34a and miR-34b were significantly higher than those of the controls (t =- 3.20,- 3.32,P ＜ 0.05).Conclusions Based on the expressions of p53 and k-ras gene and miRNA,it can be concluded that the residents surrounding the high radon hot springs received radiation damage.

Objective To explore the preventive effect of early bowel intervention on the gastrointestinal dysfunction in patients with invasive mechanical ventilation.Methods Sixty patients with invasive mechanical ventilation were equally randomly divided into the observation group and the control group.patlents in the control group were treated by conventional nursing care,while Patients in the observation group were given the early bowel intervention including abdominal massage and stimulation of rectum.The two groups were compared in terms of gastrointestinal dysfunction.Result The rate of gastrointestinal dysfunction in the observation group was significantly lower than that of the control group(P<0.05).Conclusion The early bowel intervention may effectively promote intestinal peristalsis,protect the intestinal digestion, absorption of nutrients and mucosal barrier function and prevent gastrointestinal dysfunction in patients with invasive mechanical ventilation during enteral nutrition.