Objective To establish a novel clinical application process of the optical surface monitoring system(OSMS)guided volumetric modulated arc therapy(VMAT)for total body irradiation(TBI),and to assess the accuracy and effectiveness of OSMS in inter-fractional auxiliary positioning before radiotherapy and real-time monitoring of intra-fractional motion during radiotherapy.Methods A retrospective analysis was conducted on 15 leukemia patients who underwent OSMS-guided VMAT-TBI before hematopoietic stem cell transplantation.CT simulation positioning was performed,and the whole-body image data which were collected in head-first supine position(HFS)and feet-first supine position(FFS)were transmitted to the treatment planning system for image registration,multicenter VMAT planning and dose verification.The prescription dose was 800 cGy in 4 fractions twice daily.OSMS was used to assist positioning before delivery,and CBCT was used for position verification.During treatment,OSMS was used for monitoring.The intra-fractional error monitored by OSMS in real time was obtained by analyzing the offline log files.Results The mean dose and coverage of the target area in HFS plan were(905.4±19.0)cGy and 93.0%±2.8%.The mean doses to lung and kidney were(603.7±55.7)cGy and(600.4±49.6)cGy,respectively,and the maximum dose to the lens was(393.9±58.9)cGy.The mean dose and coverage of the target area in FFS plan were(888.5±58.9)cGy and 94.0%±3.2%;and the maximum dose at the junction was(1148.9±72.9)cGy.Fractional treatment delivery time was(75.1±15.1)min.OSMS-assisted positioning was carried out before delivery,and the total deviations of CBCT three-dimensional vector in translational and rotation directions were(2.71±1.96)mm and 0.91°±0.90°,respectively.The three-dimensional vector deviation of the intra-fractional motion amplitude in translational direction monitored by OSMS during the treatment was(1.95±1.88)mm,of which the deviation within 1 mm accounted for 57.5%,79.7%and 62.1%in longitudinal,lateral and vertical directions,respectively.The three-dimensional vector deviation in rotation direction was 0.76°±0.72°,of which the deviation within 1°accounted for 93.1%,85.7%and 94.3%in rotation,pitch and roll directions,respectively.Conclusion VMAT simplifies TBI process,while improving target coverage and organs-at-risk sparing.The use of OSMS can reduce positioning errors,especially rotation errors.In order to ensure the accurate implementation of TBI and the safety of patients,it is necessary to use OSMS for auxiliary positioning and intra-fractional position monitoring.

Objective To establish a reliable pretreatment method for the detection of mequindox and its metabolite in pork luncheon meat by ultra-performance liquid chromatography/triple qudrupole tandem mass spectrometry. Methods Samples were extracted with ethyl acetate, and the results of purification and enrichment by PAX and PEP solid-phase extraction columns were analyzed. Acetonitrile/methanol (3:11) - 0.1% formic acid water was used as the mobile phase, and Shimadzu Inertsil ODS-3-column (3µm, 2.1 × 100mm) chromatographic columns were used for qualitative and quantitative analysis using the multi-reaction detection positive ion mode. Results The results showed that PEP cartridge had good recovery rate. The detection limit of mequindox was 0.10µg/kg, and limit of quantitation was 0.30µg/kg. The average recoveries for spiked levels of 0.33, 0.83, and 1.65µg/kg were 127%, 72.0%, and 60.1%, respectively. The detection limit of 2-quinoxalinecarboxylic acid was 0.10µg/kg, and limit of quantitation was 0.40µg/kg. The average recoveries for spiked levels of 0.42, 1.05, and 2.1µg/kg were 125%, 99.0%, and 60.9%, respectively. Conclusion This method is suitable for the determination of mequindox and its metabolite 2-quinoxalinecarboxylic acid in luncheon meat.

Objective To research the clinical application of procalcitonin (PCT) combined with high sensitivity C reactive protein ( hs-CRP ) in the diagnosis and treatment of bronchopneumonia in children. Methods From February 2016 to March 2017, seventy-nine cases of 2～6 years old children with bronchial pneumonia in Hainan Maternity and Child Health Care Hospital were selected as the observation group. According to the degree of infection,the patients were divided into the general infection group (46 cases) and the severe infection group (33 cases). At the same time,a total of 43 healthy children of the same age group who underwent physical examination at the physical examination center of the same hospital during the same period were selected as control group. The changes of PCT and hs-CRP levels among different groups were compared. Results Before treatment, the levels of PCT and hs-CRP in the observation group were ( 0. 781 ±0.273) μg/L,(15.21±2.57) g/L,higher than those in the control group ((0.038±0.019)μg/L,(2.83 ±0. 49) g/L),the difference of the two groups was statistically significant (t＝17. 789,31. 224,respectively,P＝0. 000). The PCT and hs-CRP levels of children in the general infection group were (0. 673±0. 186)μg/L, (12. 78±2. 52) g/L,which were significantly lower than those of the severe infection group ((1. 235±0. 287) μg/L,(18. 54±3. 67) g/L),and the differences were statistically significant (t＝10. 557,8. 275,P＝0. 000). After 7 days of treatment,the levels of PCT and hs-CRP in the general infection groups ((0. 112±0. 045)μg/L, (3. 92±0. 73) g/L) were still lower than those in the severe infection group ((0. 171±0. 062)μg/L,(5. 21 ±1. 08) g/L)),and the differences were statistically significant (t＝4. 970,6. 337,P＝0. 000). The levels of PCT and hs-CRP in general infection group and severe infection group were significantly lower than those before treatment ( t＝19. 882,22. 904,20. 816,20. 016,P＝0. 000). Before the treatment,the PCT and hs-CRP positive rates in general infection group and severe infection group were 67. 39%,60. 87% and 90. 91%,87. 88%. After treatment,the PCT,hs-CRP positive rates of general infection group and severe infection group were 10. 87%, 23. 91%,30. 03% and 48. 48%. The positive rates of PCT and hs-CRP in the two groups after treatment were significantly lower than those before treatment,the differences were statistically significant (t ＝30. 849,12. 863, 25. 384,11. 803,P＝ 0. 000,0. 000,0. 000,0. 001) . The positive rates of PCT and hs-CRP in the general infection group before and after treatment were all significantly lower than those in the severe infection group,the differences were statistically significant(χ2＝6. 040,6. 976,4. 717,5. 157,P ＝0. 014,0. 008,0. 029,0. 023). Conclusion The levels of PCT and hs-CRP in children with bronchial pneumonia were significantly higher than those in healthy children of the same age. During the period of diagnosis and treatment,the changes of PCT and hs-CRP levels can be observed,so that the attending doctors can control their changes in time and play a guiding role in clinical treatment.

Objective To determine if preventive antibiotics is effective in stroke associated pneumonia in patients with acute stroke.Methods Medline (January 1950 to January 2017),EMBASE (January 1974 to January 2017),Cochrane Library (January 2009 to January 2017),CNKI (January 1979 to January 2017)and Wanfang data (January 1998 to January 2017) were searched for randomized controlled trial comparing preventive antibiotics with placebo/blank controls for stroke associated pneumonia in patients with acute stroke.The included studies were screened out strictly based on the criterion of inclusion and exclusion.The quality of included studies was evaluated and the data were extracted by two researchers independently.RevMan 5.1 was used for Meta analysis.Results A total of 4 studies involving 3894 patients were included.The results of Meta-analysis indicated that there was no significant difference in the incidence of stroke associated pneumonia between preventive antibiotics and control groups (OR=0.96,95％CI:0.72-1.29,P=0.810);and there were no statistically significant differences in mortality (OR=1.05,95％CI:0.88-1.25,P=0.570) and good outcome (modified Rankin scale ≤ 2,OR=1.02,95％CI:0.89-1.17,P=0.780).There were no serious adverse reactions related to the studied drugs in 4 studies.Conclusion Preventive antibiotics could neither reduce the incidence of stroke associated pneumonia nor decrease the mortality or improve the proportion of good outcome.

Objective To investigate the effect of polycyclic aromatic hydrocarbons (PAHs) exposure on the level of histone H3Ser10 phosphorylation (p-H3S10) and DNA damage degree in peripheral blood lymphocyte (PBLCs). Method 75 coke oven workers from Benxi steel plant in Liaoning Province of China (PAHs-exposed group) and local 50 hot rolling workers (control group) were recruited in this study with age, working years, labor intensity and high temperature for matching factors using cluster sampling method in 2014. HPLC-fluorescence was performed to determine the level of urinary 1-hydroxypyrene (1-OHP), DNA damage and specific histone modification were measured in PBLCs of the subjects through comet assay and ELISA assay, respectively. Linear regression model analysis was used to analyze the differences among PAHs exposure, DNA damage and p-H3S10 level in two groups. The Mediation analysis was used to analyze the regulated relationships between urinary 1-OHP, DNA damage and histone modification through the bootstrap method. Results Age of the control and the exposed group were (45.32± 8.32) and (43.87 ± 5.67) years old (P=0.284). The concentration of urinary 1-OHP, OTM value, Tail DNA%and p-H3S10 level in exposure group were higher than that in control group,while the M (P5-P95) of p-H3S10 levels in control and exposed group were 2.21 (0.68-4.71), 4.54 (1.85-23.91) (P<0.001). The degree p-H3S10 level was increased after the subgroups which were (2.59 ± 1.19)%, (3.24 ± 2.81)%, (5.55 ± 3.25)%, (8.77 ± 7.84)%, respectively, divided by quantitated 1-OHP concentration as P0-P25, P26-P50, P51-P75 and P76-P100 (P<0.001). We also found the correlations between urinary 1-OHP and p-H3S10 level or OTM value or Tail DNA%, β (95%CI) were 0.264 (0.167-0.360), 0.500 (0.299-0.702), and 0.510 (0.384-0.671), respectively (P<0.001). Similar result was also observed between p-H3S10 level and OTM value or Tail DNA%, β (95%CI) were 0.149 (0.073-0.226) and 0.220 (0.132-0.308) (P<0.001). Moreover, the mediation effect value of DNA damage on PAHs induced p-H3S10 alteration was 0.054(P=0.040). Conclusion The results suggested that PAHs exposure could induce DNA damage and an increase in histone H3Ser10 phosphorylation in PBLCs. Particularly, the alteration of H3S10 phosphorylation may play an important role in regulating cell DNA damage repair.

Objective: To investigate the effect of polycyclic aromatic hydrocarbons (PAHs) exposure on the level of histone H3Ser10 phosphorylation (p-H3S10) and DNA damage degree in peripheral blood lymphocyte (PBLCs). Method: 75 coke oven workers from Benxi steel plant in Liaoning Province of China (PAHs-exposed group) and local 50 hot rolling workers (control group) were recruited in this study with age, working years, labor intensity and high temperature for matching factors using cluster sampling method in 2014. HPLC-fluorescence was performed to determine the level of urinary 1-hydroxypyrene (1-OHP), DNA damage and specific histone modification were measured in PBLCs of the subjects through comet assay and ELISA assay, respectively. Linear regression model analysis was used to analyze the differences among PAHs exposure, DNA damage and p-H3S10 level in two groups. The Mediation analysis was used to analyze the regulated relationships between urinary 1-OHP, DNA damage and histone modification through the bootstrap method. Results: Age of the control and the exposed group were (45.32±8.32) and (43.87±5.67) years old (P=0.284). The concentration of urinary 1-OHP, OTM value, Tail DNA% and p-H3S10 level in exposure group were higher than that in control group, while the M (P₅-P₉₅) of p-H3S10 levels in control and exposed group were 2.21 (0.68-4.71), 4.54 (1.85-23.91) (P<0.001). The degree p-H3S10 level was increased after the subgroups which were (2.59±1.19)%, (3.24±2.81)%, (5.55±3.25)%, (8.77±7.84)%, respectively, divided by quantitated 1-OHP concentration as P₀-P₂₅, P₂₆-P₅₀, P₅₁-P₇₅ and P₇₆-P₁₀₀ (P<0.001). We also found the correlations between urinary 1-OHP and p-H3S10 level or OTM value or Tail DNA%, β (95%CI) were 0.264 (0.167-0.360), 0.500 (0.299-0.702), and 0.510 (0.384-0.671), respectively (P<0.001). Similar result was also observed between p-H3S10 level and OTM value or Tail DNA%, β (95%CI) were 0.149 (0.073-0.226) and 0.220 (0.132-0.308) (P<0.001). Moreover, the mediation effect value of DNA damage on PAHs induced p-H3S10 alteration was 0.054(P=0.040). Conclusion The results suggested that PAHs exposure could induce DNA damage and an increase in histone H3Ser10 phosphorylation in PBLCs. Particularly, the alteration of H3S10 phosphorylation may play an important role in regulating cell DNA damage repair.

Objective To investigate the effect of polycyclic aromatic hydrocarbons (PAHs) exposure on the level of histone H3Ser10 phosphorylation (p-H3S10) and DNA damage degree in peripheral blood lymphocyte (PBLCs). Method 75 coke oven workers from Benxi steel plant in Liaoning Province of China (PAHs-exposed group) and local 50 hot rolling workers (control group) were recruited in this study with age, working years, labor intensity and high temperature for matching factors using cluster sampling method in 2014. HPLC-fluorescence was performed to determine the level of urinary 1-hydroxypyrene (1-OHP), DNA damage and specific histone modification were measured in PBLCs of the subjects through comet assay and ELISA assay, respectively. Linear regression model analysis was used to analyze the differences among PAHs exposure, DNA damage and p-H3S10 level in two groups. The Mediation analysis was used to analyze the regulated relationships between urinary 1-OHP, DNA damage and histone modification through the bootstrap method. Results Age of the control and the exposed group were (45.32± 8.32) and (43.87 ± 5.67) years old (P=0.284). The concentration of urinary 1-OHP, OTM value, Tail DNA%and p-H3S10 level in exposure group were higher than that in control group,while the M (P5-P95) of p-H3S10 levels in control and exposed group were 2.21 (0.68-4.71), 4.54 (1.85-23.91) (P<0.001). The degree p-H3S10 level was increased after the subgroups which were (2.59 ± 1.19)%, (3.24 ± 2.81)%, (5.55 ± 3.25)%, (8.77 ± 7.84)%, respectively, divided by quantitated 1-OHP concentration as P0-P25, P26-P50, P51-P75 and P76-P100 (P<0.001). We also found the correlations between urinary 1-OHP and p-H3S10 level or OTM value or Tail DNA%, β (95%CI) were 0.264 (0.167-0.360), 0.500 (0.299-0.702), and 0.510 (0.384-0.671), respectively (P<0.001). Similar result was also observed between p-H3S10 level and OTM value or Tail DNA%, β (95%CI) were 0.149 (0.073-0.226) and 0.220 (0.132-0.308) (P<0.001). Moreover, the mediation effect value of DNA damage on PAHs induced p-H3S10 alteration was 0.054(P=0.040). Conclusion The results suggested that PAHs exposure could induce DNA damage and an increase in histone H3Ser10 phosphorylation in PBLCs. Particularly, the alteration of H3S10 phosphorylation may play an important role in regulating cell DNA damage repair.

OBJECTIVE:To understand the distribution and drug resistance of the pathogens by sputum culture in patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD) in our hospital so as to provide reference for rational use of antibiotics. METHODS:From Dec. 2010 to Dec. 2014,the sputum specimens were collected from the AECOPD patients,then the identification of 307 strains of pathogens and drug susceptibility test were carried out,and the data were analyzed statistically by using SPSS 17.0 software. RESULTS:A total of 307 strains of pathogens were collected,of which 17 cases of gram-positive ba-cillus accounted (5.54%),247 cases of gram negative cocci (80.46%),43 cases of fungi accounted (14.00%). The most com-mon isolates from sputum specimens were Pseudomonas aeruginosa (33.22%),Acinetobacter baumannii (19.54%),Stenotroph-omonas maltophilia(9.77%),Klebsiella pneumoniae(7.82%),Candida albicans(6.84%),etc. P. aeruginosa and A. baumannii were highly multidrug-resistant. There were 10 strains of ESBLs-producing K. pneumonia isolated, with the isolation rate of 41.67%. No Staphylococcus aureus strain was found resistant to vancomycin,teicoplanin or linezolid. Methicillin resistant strains in S. aureus(MRSA)accounted for 50.00%. CONCLUSIONS:Gram-negative bacilli are the most common pathogens in the AE-COPD patients. The common species of pathogens are highly resistant. More attention should be paid to the drug resistance monitor-ing of pathogens and rational use of antibiotics according to the results of susceptibility test.

Objective To explore the function of p53 on regulating the expression of miR-148b in lung cancer cell line PC-9 and its corresponding molecular mechanism and the impact on cell proliferation. Methods Transient transfection of p53 eukaryotic expressing plasmids into lung cancer cell line PC-9 was performed to establish a cell model over-expressing p53. RT-PCR was used to explicit the impact of p53 on the expression of miR-148b. A reporter vector containing miR-148b promoter was used to investigate the function of p53 on regulating the transcription of miR-148b. Low-expressing miR-148b by transfecting its specific inhibitors , a CCK-8 assay was performed to explore the influence of miR-148b on the lung cancer cell proliferation inhibited by p53. Results Over-expression of p53 promoted miR-148b expression in lung cancer cell line PC-9. P53 could increase the luciferase activity driven by miR-148b promoters. Knockdown of miR-148b attenuated the impact of p53 on inhibiting the proliferation of PC-9 cells. Conclusion P53 inhibits the proliferation of lung cancer cell line PC-9 partially depending on miR-148b.

This study examined the role of EMP-1 in tumorigenesis of non-small cell lung carcinoma (NSCLC) and the possible mechanism. Specimens were collected from 28 patients with benign lung diseases and 28 with NSCLC, and immunohistochemically detected to evaluate the correlation of EMP-1 expression to the clinical features of NSCLC. Recombinant adenovirus was constructed to over-express EMP-1 and then infect PC9 cells. Cell proliferation was measured by Ki67 staining. Western blotting was performed to examine the effect of EMP-1 on the PI3K/AKT signaling. Moreover, tumor xenografts were established by subcutaneous injection of PC9 cell suspension (about 5×10(7)/mL in 100 μL of PBS) into the right hind limbs of athymic nude mice. The results showed EMP-1 was significantly up-regulated in NSCLC patients as compared with those with benign lung diseases. Over-expression of EMP-1 promoted proliferation of PC9 cells, which coincided with the activation of the PI3K/AKT pathway. EMP-1 promoted the growth of xenografts of PC9 cells in athymic nude mice. It was concluded that EMP-1 expression may contribute to the development and progress of NSCLC by activating PI3K/AKT pathway.
Carcinogenesis ; metabolism ; pathology ; Carcinoma, Non-Small-Cell Lung ; metabolism ; pathology ; Cell Line, Tumor ; Humans ; Lung Neoplasms ; metabolism ; pathology ; Oligopeptides ; metabolism ; Phosphatidylinositol 3-Kinases ; metabolism ; Proto-Oncogene Proteins c-akt ; metabolism ; Signal Transduction ; physiology