Adolescent ; Adult ; Cities ; Cross-Sectional Studies ; Female ; Health Knowledge, Attitudes, Practice ; Humans ; Male ; Occupational Exposure ; Occupational Health ; Private Sector ; Sampling Studies ; Young Adult

Objective To study the clinical features,diagnosis and management of small cell carcinoma of the bladder (SCCB).Method The clinical data of 18 cases of patients with small cell carcinoma of the bladder were analyzed retrospectively and the literature were reviewed.There were 16 males and 2 females,ages 54 to 81 years (median age,61 years).Clinical manifestations included gross hematuria in 11 cases,urgency in 2 cases,dysuria in 2 cases and postoperative review after TURBT of bladder urothelial carcinoma in 3 cases.The median tumor size was 3.35cm (ranged,1.0 to 6.0 cm).2 cases underwent TURBT and intravesical chemotherapy regularly were followed after surgery.3 cases underwent partial cystectomy,intravenous chemotherapy combined with radiotherapy was followed in one case,the other 2 cases refused the following therapy.13 cases underwent radical cystectomy,intravenous chemotherapy was followed in 2 cases,pelvic radiotherapy was followed in 2 csaes and intravenous chemotherapy combined with radiotherapy was followed in 2 cases,the other 7 cases refused the following therapy.Results 11 cases were pure SCCB,7 cases were mixed SCCB,all with urothelial carcinoma.T1N0M0 in 3 cases,T2N0.1M0 in 4 cases,and T3N0-2M0 in 11 cases.The duration of follow-up was from 5 to 35 months after surgery.9 cases died of tumor metastasis,9 cases are still alive,except 1 case with lymph node metastasis,the other 7 cases are free of tumor recurrence or metastasis.Conclusions SCCB is rare,with high malignant degree and poor prognosis.The prognosis of the pure SCCB may be worse than the mixed SCCB.The diagnosis depends on pathology examination.Radical cystectomy is the main treatment method,the strategy of bladder-preserving may be an attempt for proper SCCB patients.Adjuvant therapy plus surgery may be better.

Objective To analyze the results of the Objective Structured Clinical Examination(OSCE) of medical interns in Department of Gynecology and Obstetrics,and to assess the role of OSCE in clinical teaching and practice. MethodsAtolal of 104 medical interns of five-year education program in 2002 and seven-year education program in 2003 in School of Medicine had taken part in OSCE of gynecology and obstetrics.The OSCE consisted of six stations: gynecologic examination,obstetric examination,oral test,interrogation of standardized-patients(SP),drawing partogram,and non-stress test(NST) explanation.After gathering the data of each station,the software of SPSS 11.0 was used to make statistical analysis. Results The median scores were as follows: 92.0 for gynecologic examination,91.0 for obstetric examination,83.5 for oral test,80.0 for interrogation of SP,80.0 for drawing partogram,and 70.0 for NST explanation.There was no significant impact of familiarity to OSCE on the results of the test.The results showed that medical interns did good job in basic performance,but lack of clinical practice skills in some complicated practice of gynecology and obstetrics.Conclusion The grading system and stations setup of OSCE in Department of Gynecology and Obstetrics in Shanghai Sixth People's Hospital show objectivity and equity.The OSCE can be widely applied in the after-department examination and even graduation examination.

Objective To investigate the changes of extraceUular regulated kinase 1/2 (ERK1/2) phosphorylation and assess the effects of blocking the ERK1/2 phosphorylation on rats with acute necrotizing pancreatitis (ANP). Methods The ANP model was induced by retrograde injection of 5% sodium tanrocholate into the biliary and pancreatic duct. 5 rats were treated as normal control. Other 75 Sprague-Dawley (SD) rots were randomly divided into sham operations(SO) group (n =25), ANP group (n =25) and PD98059 group (n =25). The rats were sacrificed at 15 min, 30 min, 1 h, 3 h and 6 h after ANP induction, the blood and pancreatic sample were taken. Pathological changes of pancreas were observed with light microscope and scored. The serum level of TNF-α and IL-1β was determined by ELISA. MPO activities in pancreas were measured by enzyme chemistry assay. Western blotting was performed to determine the phosphorylations of ERK1/2 in the pancreas homogenates. Results There was no significant pathologic changes in rats of SO group;but significant injuries occurred in ANP group, the pathologic score at 3 h was 9.9 ± 0.4;the extent of injuries attenuated in PD98059 group, the pathologic score at 3 h was 4.0 ± 0.4 (P < 0.05). The serum levels of TNF-α at 3 h in SO, ANP and PD98059 groups were (65.8 ± 20.5) pg/ml, (286.5 ± 50.3) pg/ml, (180.4±32.9)pg/ml, respectively;the serum levels of IL-1β at 3 h in SO, ANP and PD98059groups were (85.8 ± 25.5) pg/ml, (293.8 ± 46.3) pg/ml, (200. 5 ± 33.6) pg/ml, respectively;MPOactivities in pancreas were (0. 19 ± 0.02)U/g, (0.61±0.05)U/g, (0.52±0.03) U/g, and the values in ANP and PD98059 groups were significantly higher than those in SO group, while the values in PD98059 group were significantly lower than those in ANP group (P < 0.01). The expression of ERK1/2 phosphorylation in normal pancreas was 1100 ± 141, the expressions of ERK1/2 phosphorylation in ANP group at 15 min, 30 min were 5300 ± 486, 5621 ± 384, respectively;the expressions began to decrease 1 h later and returned the similar level as SO group at 6 h;the expressions of ERK1/2 phosphorylation in PD98059 group at 15 min, 30 rain were 4200 ± 370, 3600 ± 290, respectively;which were signifieanfly lower than those in ANP group (all P value < 0. 01). Conclusions The ERK1/2 signal transduetion pathway plays an important role in the pathogenesis of ANP. Inhibition of ERK1/2 phosphorylation by PD98059 may decrease the production of IL-1β, TNF-α and pancreatic MPO, attenuate the extent of pancreatic pathologic injuries.

Objective:A new algorithm based on Hough transform (HT) was proposed to improve the accuracy and stability of the film image analysis of Automatic Quality Assurance (AQA) test, and to explore the influence of the resolution of film image on the test results.Methods:Nine pairs of films were obtained for AQA modules in this study. Firstly, the median filter was used to preprocess the grayed-out film image to remove noise interference. Then, a global threshold was utilized to binarize the image. The images were edge-detected and the film edge line was extracted by Hough transform. The film image was transformed to the correct position. Finally, the edge of the field shadow circle and the shadow circle of the tungsten ball were extracted by the edge detection method and Hough transform. The radial error was finally obtained by analyzing the concentricity.Results:There was no significant difference in the accuracy between the test results yielded by the HT method and the AQA software ( P>0.05). The difference in the standard deviation of the test results was statistically significant ( P=0.027), indicating that the algorithm increased the stability while ensuring the accuracy of film analysis. Increasing the resolution of film scanning failed to significantly improve the accuracy and stability of film analysis in both two methods. Conclusions:The algorithm used in this study can eliminate the human error caused by film scanning placement while ensuring the accuracy of film analysis, providing a more stable way for the AQA test of the CyberKnife system.

Objective To investigate the post-traumatic stress disorder (PTSD) and its influence factors among people living with HIV /AIDS (PLWHA) ,and provide evidence for developing relevant interventions and treatment methods .Methods Anony-mously completed questionnaires ,including self-designed questionnaire and the post-traumatic checklist civilian version (PCL-C) , were received from PLWHA in Suizhou from December 2014 to March 2015 .Descriptive analysis and multivariate logistic regres-sion analysis were used to examine factors associated with PTSD .Results Among 243 qualified PLWHA ,106 of them were positive with PTSD (43 .62% ) ,and the prevalence of PTSD among male and female were 37 .88% and 50 .45% ,respectively .Among the three characteristic symptoms ,repeated flashback was the highest (78 .60% ) ,then hyper-vigilance (64 .20% ) ,and the positive rate of avoidance/numbness was the lowest (57 .20% ) .Multivariate logistic regression analysis showed that female was more suscepti-ble to PTSD than male (OR = 1 .960 ,95% CI :1 .025 - 3 .747) ,discrimination or unfair treatment would increase the risk of PTSD (OR= 2 .967 ,95% CI :1 .498 - 5 .876) ,and the frequency of fear/tension was positive correlated with PTSD (occasionally OR =2 .074 ,95% CI :1 .008 - 4 .265 ;always OR = 6 .690 ,95% CI :2 .708 - 16 .531) .Conclusion PLWHA had a high level of PTSD ,and fe-male PLWHA and those who felt fear/tension or experienced discrimination/unfair treatment were more likely to suffer from PTSD .

A high-product superoxide dismutase(SOD)bacterial strain was first obtained from the soil around the warm spring of Changbai Mountain,which is alkaline-resistant.The nature analysis by the inhibition of H2O2 and chloroform-ethanol indicated that the SOD was Mn-SOD.It belongs to bacillus genus by the modal character,physiological and biochemical character.The phylogenetic analyses based on 16SrDNA sequence indicated that the strain 110-2 was closed to Bacillus sp.MO6 with 100% identity and 99% with Bacillus licheniformis.According to the sodA sequence of Bacillus licheniformis and conservative regions of many kinds of bacillus,which were published in GenBank,two pairs of primers were designed and the complete sequence of Mn-SOD(600bp)and the core fragment(430bp)were amplified by PCR techniques.The recombinant plasmid pMD18-SOD was built successfully.

Objective To evaluate the role of protein kinase Cα (PKCα)/heme oxygenase-1 (HO-1) signaling pathway in endotoxin-induced damage to alveolar macrophages and the relationship with mitofusin-1 (Mfn1) in rats.Methods Rat alveolar macrophages NR8383 cells cultured in vitro were seeded in 96-well plates at a density of 1 × 104 cells/ml.NR8383 cells were divided into 5 groups (n =15 each)using a random number table:control group (group C),endotoxin challenge model group (group E),PKCα inhibitor Go6976 group (group G),PKCα agonist PMA group (group P) and dimethyl sulfoxide group (group D).NR8383 cells were stimulated with 10 μg/ml lipopolysaccharide (LPS) to establish the model of endotoxin challenge in alveolar macrophages.In G,P and D groups,cells were pretreated with 5 μmol/L Go6976,100 nmol/L PMA and 0.1％ dimethyl sulfoxide,respectively,for 30 min starting from 30 min before stimulation with LPS,and 10 μg/ml LPS was then given.The cells were collected after 24 h of incubation for measurement of malondialdehyde (MDA) and reactive oxygen species (ROS) contents,superoxide dismutase (SOD) activity and expression of PKCα,HO-1 and Mfn1 protein and mRNA (by fluorescent quantitative polymerase chain reaction or Western blot).Results Compared with group C,MDA and ROS contents were significantly increased,the SOD activity was decreased,the expression of PKCα and HO-1 protein and mRNA was up-regulated,and the expression of Mfn1 protein and mRNA was downregulated in E,G,P and D groups (P＜0.05).Compared with group E,MDA and ROS contents were significantly increased,the SOD activity was decreased,and the expression of PKCα,HO-1 and Mfn1 protein and mRNA was down-regulated in group G,MDA and ROS contents were significantly decreased,the SOD activity was increased,and the expression of PKCα,HO-1 and Mfn1 protein and mRNA was upregulated in group P (P＜0.05),and no significant change was found in the parameters mentioned above in group D (P＞0.05).Conclusion Promotion of Mfn1 expression following PKCα/HO-1 signaling pathway activation is the endogenous protective mechanism of endotoxin-induced damage to alveolar macrophages of rats.

Protective effect and mechanism of electroacupuncture (EA) on acute reperfusion ventricular arrhthmia was investigated. Ventricular arrhythmia was induced by occlusion of the proximal left anterior descend (LAD) branch of coronary artery for 5 min and followed with 15 min reperfusion. EA on acupoint "Neiguan", "Jianshi" was performed at 30 min before ligation and continued another 5 min during ischemia. Isoprenaline (20, 30 and 50 microg/kg) or atropine (1 mg/ kg) was intravenously injected at 5 min before ischemia. The results showed that EA significantly decreased the incidence of ischemia/reperfusion (I/R) induced ventricular tachycardia (VT), ventricular fibrillation (VF) and mortality as compared to I/R group. Atropine partially suppressed the EA's effect of antiarrhythmia; Isoprenaline increased the incidence and severity of reperfusion arrhythmia, which was inhibited by EA, but this inhibition of EA was blocked with increasing dose of isoprenaline. The results indicated that EA treatment could prevent the occurrence of reperfusion ventricular arrhythmia in rats with myocardial ischemia, and its mechanism might be related to the regulation of EA on the beta-adrenoceptors and M-cholinergic receptor activation in myocardium.

Background Oscillatory potentials (OPs) of scotopic electroretinogram (ERG) plays an important role in the evaluation of visual function in multiple retinal diseases.However,the origin of OPs is uncompletely clear.It is essential to analyze the time domain and frequency domain components for the further study of OPs.Objective The present study was to investigate the change characteristics of frequency spectrum of scotopic OPs with age and stimulating intensity.Methods RCS-rdy+-p+rats with the ages of 21,25,32,35,37,46,60,90 days were selected iu this study and 3 rats for each.Scotopic flash ERG were recorded from all the rats with RETI-scan system.Gold-foil ring cornea recording electrode was used as the recording electrode and the steel needle electrode was used as the reference and earth electrode during the record.The intensity of stimulating light was set at-20,-10,-5,0 and 5 dB respectively.Data were output into the computer and processed by the software Matlab7.0.Results The principle frequency corresponding to maximum amplitude component was 80-120 Hz in the various ages of rats under the different stimulating conditions above.With the increase of the intensity of stimulating light,high frequency component (200-250 Hz) began to appear and the amplitudes showed a gradually raise upon the intensity of light.The major component was subdivided into two peaks at 0 dB stimulation.Further,the age affected the major frequency peak with the maximum value at 60-day-old rats and the minimum value at 25-day-old rats.Also,the pass-band width of main amplitude appeared to be maximal at 60-day-old rats and minimal at 25-day-old rats.Conclusions OPs in Rcsrdy+-p+ rats are influenced by stimulating intensity and agc.Stimulating intensity affects the amplitude and age lead to the change of distribution of primary frequency of OPs.It is possible to know the influences of the degeneration of rods and be helpful to diagnosis this kind of disease.