Objective To study the clinical significance and the expression of Twist protein in non-small cell lung cancer(NSCLC).Methods The expression of Twist protein was examined in formalin-fixed paraffin-embedded tissue samples of 61 NSCLC by S-P immunohistochemical method.Results The expression level of Twist in NSCLC was significantly higher than that of normal lung tissue;the positive expression of Twist protein was related to the histotype,clinical stage and lymph node metastasis;the expression level of Twist protein in the cases whose survival time was less than 4 years was significantly higher than that in the cases whose survival time more than 4 years;the Cox analysis revealed that smoking and lymph node metastasis were the noticeable affective factors on the death of the NSCLC patients after surgery.Conclusion s Twist gene played an important role in the genesis and development of NSCLC,and was related to the prognosis.

Objective To analyze the prognostic factors associated with three-year survival outcome in patients with serous ovarian adenocarcinoma by classification tree.Methods Retrospectively we analyzed 81 cases with serous ovarian adenocarcinoma who had 3-year clinical outcomes and were hospitalized in People's Hospital from Jan 1991 to Dec 2003 by classification and regression trees(CART)software.Establish the classification tree.Results Among the factors that were associated with the 3-year survival rate,age was the most important factor,other factors in turn were International Federation of Gynecology and Obstetrics(FIGO)stage,lymphoid metastasis,residual size after operation,chemotherapy and pathologic grade.By substitution variable analysis,it was demonstrated that there was cross interaction between age and residual size as well as age and chemotherapy.Conclusion Age,FIGO stage,lymphoid metastasis,residual size after operation,chemotherapy and pathologic grade are important prognostic factors related with three-year survival probability of serous ovarian adenocarcinoma patients.

Objective To investigate the detection of IMP andVIM metallo-β-lactamases (MβLs)genes in clinically iso-lated gram-negative bacteria as well as bacterial resistance toβ-lactam antimicrobial agents.Methods 113 clinically isolated bacteria were performed antimicrobial susceptibility testing by Kirby-Bauer method ,drug-resistant genes IMP and VIM were detected by polymerase chain reaction (PCR),PCR products were sequenced and aligned with BLAST software. Results VIM gene was detected in 1 Pseudomonas fluorescens strain ,IMP gene was detected in 15 strains ,they were Klebsiella pneumoniae (n=6),Acinetobacter baumannii (n=3),Escherichia coli (n=2),Ralstonia picket-tii (n=1),Pseudomonas aeruginosa (n=1 ),Citrobacter amalonaticua (n=1 ),and Enterobacter cloacae (n=1 ). BLAST results showed that VIM gene was VIM-2 subtype,similarity with gene bank was 99%;all IMP genes were IMP-1 subtype,which were highly homologous ,similarity was 98%-99%.Resistant rates of IMP positive strains to ceftriaxone,cefotaxime,cefoxitin,aztreonam and imipenem were all significantly higher than negative strains (all P <0.05).Conclusion IMP genes of different strains are highly homologous,all are IMP-1 type,indi-cating that IMP genes are highly transmissible and can spread among different species of bacteria.IMP genes are related with resistance ofβ-lactam antimicrobial agents.

Objective To construct cyclic clinical skill training system and to evaluate its application effect in clinical practice in department obstetrics and gynecology.Methods Cyclic clinical skill training system was established in department obstetrics and gynecology.Totally 104 eight-year program clinical medicine students of grade 2005 and 2006 in people's hospital of Peking university were enrolled as the research object and were divided into control group ( n =54,grade 2005) and experimental group (n =50,grade 2006 ).Students of control group were taught by normal teaching method and contacted with patients in clinical practice while those in experimental group were taught by cyclic clinical skill training system. (theoretical test before practice-simulated training-real practicetheoretical test after practice).Results of theoretical test after practice were compared between the two groups,using statistical t test.Results At the end of internship,students in experimental had higher scores in theoretical test than those in control group,with statistical differences (88.70 vs.85.02,P ＜0.05).Students' skill test scores were (77.04 ± 10.35 ) and (45.61 ± 14.42) before practice while (84.59 ± 10.10) and (68.78 ± 10.83) after practice,with statistical differences ( P ＜ 0.01 ).Conclusions Cyclic clinical skills training system can promote students' skills of obstetrics and gynecology,therefore worth promoting.

Objective To evaluate the effect of different tube voltages on the radiation dose and image quality of a full field digital mammography system.Methods Both experiments were performed under manual exposure mode.In one experiment,the tube voltages were kept constant at 25,28 and 31 kVp,and the CIRS 015 phantom was exposed at three target/filter combinations molybdenum/molybdenum (Mo/Mo),molybdenum/rhodium (Mo/Rh),and rhodium/rhodium (Rh/Rh) and at tube current-exposure time products of 32-140mAs.The entrance skin exposure (ESE) and average glandular dose (AGD) were recorded,the signal-to-noise ratio(SNR) and contrast-to-noise ratio (CNR) and figure of merit (FOM) were measured to evaluate the influences of different tube voltages on dose and image quality at same target/filter combination.The univariate of randomized completed block-design was used for statistics.In second experiment,the phantom were exposed using Mo/Rh combination when the tube current-exposure time product was kept constant at 56 mAs,and the tube voltage varied between 23 and 33 kVp in 1-kVp increments.The ESE and AGD were recorded,the SNR,CNR and FOM were measured for plotting the curves against tube voltages.Results At Mo/Mo combination,the AGD,ESE,SNR,CNR and FOM of 25,28 and31 kVp were(1.25 ±0.56) mGy,(6.46±2.86) mGy,71.52±8.37,1.91 ±0.26,3.21 ± 0.68; (1.94 ±0.85) mGy,(9.18±4.07) mGy,144.46 ± 11.31,2.41 ±0.28,3.37 ±0.96 and (3.01 ±1.38) mGy,(12.60±5.59) mGy,128.89 ±15.29,2.47 ±0.31,2.31 ±0.76 respectively; at Mo/Rh combination were (1.23 ±0.55) mGy,(5.26 ±2.33) mGy,67.31 ±4.11,1.82 ±0.19,3.01 ± 0.82; (1.86 ±0.84) mGy,(7.57 ±3.34) mGy,139.54 ± 12.16,2.30 ±0.25,3.23 ±0.92 and (2.81 ±1.24) mGy,(10.48 ±4.62) mGy,127.77 ±15.14,2.59 ±0.31,2.67 ±0.68; and at Rh/Rh were(1.09 ±0.48) mGy,(4.89 ±2.16) mGy,67.46 ±2.23,1.48 ±0.72,3.08 ± 1.69; (1.75 ± 0.78) mGy,(6.88 ±3.03) mGy,137.74 ± 14.65,2.37 ±0.26,3.62 ± 1.07 and (2.59 ± 1.13) mGy,(9.32 ± 4.12) mGy,117.91 ± 19.05,2.51 ± 0.31,2.74 ± 0.84.Both experiments indicated that,for a given target/filter combination,the AGD,ESE and CNR increased,but the ESE/AGD decreased with the tube voltage increasing; The first experiment indicated both SNR and FOM of 28 kVp were higher than that of 25 kVp and 31 kVp; the second experiment showed both SNR and FOM decreased with tube voltages increasing.The differences of AGD、ESE、ESE/AGD、SNR、CNR and FOM among the three tube voltages were significant (F =4.391-528.848,P ＜ 0.05) ; but the difference of CNR between 28 and 31 kVp at Mo/Mo and Rh/Rh had no statistical significance (P ＞ 0.05) ; and the differences of FOM between 25 and 28 kVp at the three target/filter combinations were not statistically significant (P ＞ 0.05).Conclusion For a breast with 4.2 cm thickness and 50％ adipose 50％ glandular composition,different tube voltages have significant effects on the radiation dose and image quality.

Objective To explore the effects of Zinc Protoporphyrin and Heme on the expression of HO-1 in cochlear and the change of auditory brainstem response on diffuse traumatic brain injury model of rats.Methods Diffuse traumatic brain injury model of rats were established and randomly divided into thirteen groups.Then auditory brainstem response examination,light microscope,immunohistochemistry technique were used to evaluate the change of auditory brainstem response and the expression of HO-1 in cochlear.Results The differences of auditory brainstem response threshold and latency of wave between the experimental and the normal control group were obvious(P＜0.05).The expression of HO-1 in the control group was normal,whereas there were obvious changes of inner ear HO-1 expression in the traumatic groups.The grey value of HO-1 expression in trauma group,Znpp group and heme group was significantly associated with auditory function change(P＜0.05).Conclusion There were influence of Zinc Protoporphyrin and Hemeon the inner ear HO-1 expression and the change of auditory brainstem response with diffuse traumatic brain injury model of rats.The protective effect of heme on auditory function may be associated with the increased expression of HO-1.

Objective: To explore the clinical value of 3D-DSA technology in the diagnosis and treatment guidance of hepatic artery chemoembolization. Methods: Liver cancer patients in the treatment groups were collected to receive 3D-DSA imaging guidance at the Affiliated Hospital of Xuzhou Medical University between March and May 2017. In addition, routine 2D-DSA imaging was selected for treatment-received group. Intra-operative blood vessels and tumor-like lesions were observed. The total exposure dose (CAK, unit mGy), cumulative irradiation intensity per unit area (DAP, unit mGy.cm2) and dosage of contrast agent (ml) were calculated separately for two groups of patients. The same senior physicians and technicians operated both groups of patients. Comparisons of measurement were analyzed by t-test and chi-square test was used for count data. Results: Data of twenty patients were collected from the two groups. Tumor location, target vessels structure and shape of development were clear in all patients in the treatment group. The control group had 17 cases of tumor development and the target vascular structure was clear in 16 cases. CAK mean treatment group was lower than control group (554.11 + 38.87) mGy and (644.53 + 26.70) mGy, and DAP mean treatment group was lower than the control group (125.25 + 7.54) mGy·cm² and (143.49 + 6.18) mGy·cm². The two groups were compared (P value < 0.05), and the differences were statistically significant. The mean dose of contrast agent in the two groups were lower than control group (64.42 + 3.92) ml, (70.79 + 4.47) ml, and the differences between the two groups were statistically significant (P < 0.05). Conclusion 3D-DSA imaging technology can provide effective diagnosis and guidance in the treatment of hepatic artery chemoembolization. It can effectively reduce the radiation exposure dose and radiation intensity, and it is of high clinical value for interventional embolization of liver cancer.

Objective To evaluate the efficacy and tolerability of the combination of oxaliplatin,ifosfamide and epirubicin(IAP)in treatment of recurrent or platinum-resistant ovarian cancer patients.Methods A total of 25 patients received the combined chemotherapy of ifosfamide(3-4 g/m2),epirubicin(50-60 mg/m2)and oxaliplatin(130 mg/m2).The cycles were repeated every 21 days.The efficacy and toxicity were evaluated in 21 patients who received more than 2 cycles of IAP chemotherapy.Results The overall response rate was 71%,with a complete response in 10(48%),partial response in 5(24%),stable disease in one(5%),and disease progression in 5(24%).The median progression-free and overall survival time were 11(1 to 33)months and 31(1 to 71)months.While overall response rate was 60%in 10 patients with primary platinum resistant,and 88%in 8 patients with secondary platinumresistant.Grade Ⅲ-Ⅳ myelosuppression rate wss 30%.The most common non-hematologic toxicity was perineurotoxicity(38%).Conclusions The combination of oxaliplatin,ifasfamide and epirubicin appears to be effective for recurrent or platinum-resistant ovarian cancer patients as salvage chemotherapy and the toxicity is also tolerable.However,it needs to be evaluated by multiple clinical trials.

Objective To investigate the change of infusion particles and PH value of rifampicin for injection under dif-ferent configuration and application conditions,and to provide the best configuration method and the best infusion quality control strategy for rifampicin for injection.Methods The particle number and PH value of rifampin for injection were investigated and measured under different configuration and application conditions,and the factors affecting the formation of particles were ana-lyzed.Results The stable pH value of Rifampicin for injection was 7.2-8.1,and the number of particles was the least in the light filtering and 5%glucose 500 mL,and the number of particles was the least in 1～4 h after the configuration.Conclusion The optimal infusion quality control strategy is to filter rifampicin for injection by blocking light,500 mL of solute 5%glucose,1～4 h after configuration,and use of disposable precision filter infusion set.

Objectives:To analyze the status and temporal changes of disability-adjusted life year (DALY) for stomach and colorectal cancers among registered permanent residents in Changning District of Shanghai Municipality, and provide scientific basis for the prevention and treatment of stomach and colorectal cancers in this district.Methods:Using the cancer registration data of stomach and colorectal cancers from 2002 to 2019, we estimated the indices such as the DALYs, the DALY crude rates, the age-standardized DALY rates, etc. Then we used the Joinpoint regression model to calculate the average annual percent change (AAPC) and annual percent change (APC) to explore the temporal variations in different periods.Results:The DALYs of stomach and colorectal cancers in Changning District from 2002 to 2019 were 55 931 person years and 65 252 person years, respectively. The crude rates of DALY were 512.16/10 5 and 597.51/10 5, respectively. We observed a higher disease burden in men than in women, and the peak rate of DALY in stomach cancer was in the 75-79 years age group, while in colorectal cancer the rate was in the 85-years-or-older age group. Joinpoint regression analysis showed that from 2002 to 2019, the age-standardized DALY rate of stomach cancer showed a downward trend (AAPC=-3.86%, P＜0.05), while the trend of colorectal cancer was not statistically significant(AAPC=-0.08%, P＞0.05). However, the trends in the age-standardized DALY rates of colorectal cancer were different between males and females, with males showing an upward trend (AAPC=1.24%, P＜0.05) and females showing a downward trend (AAPC=-1.67%, P＜0.05). Conclusions:The DALY of stomach and colorectal cancers in Changning District of Shanghai showed a decreasing trend. Males and the middle-aged and elderly populations are still the key targets for disease prevention and control in this district.