Objective To study the expression and regulation of pro‐inflammatory cytokinesTNF‐α,IL‐1 ,IL‐6 in mononucle‐ar macrophages stimulated with staphylococcal protein A (SpA) .Methods THP‐1 was incubated with PMA and induced into mononuclear macrophages .Then the macrophages were incubated with varying concentrations of SpA under different time points . The effect of SpA on macrophage proliferation was measured by MTT method .The levels of inflammatory cytokines ,TNF‐α,IL‐1 and IL‐6 from the cultured cell media were measured by ELISA respectively .The levels of mRNA expression corresponding to TNF‐α,IL‐1 and IL‐6 were detected by RT‐PCR from the macrophages stimulated with SpA .All statistical analyses were performed by SPSS17 .0 software .Results The MTT result indicated that SpA had a positive effect on the proliferation of THP‐1 cells in a dosage depended manner .The addition of SpA could enhance the mRNA expression of TNF‐α,IL‐1 and IL‐6 in the stimulated mac‐rophages .It also showed a specific dose‐effect and time‐effect correlation .The macrophages secreted inflammatory cytokines and its corresponding mRNA reached its peak levels at 12 h post stimulation .Compared with the control group ,the expression and release of TNF‐α,IL‐1 and IL‐6 in macrophages from the experimental group was increased with statistical significance(P<0 .01) .Conclu‐sion SpA can promote the secretion and expression of early pro‐inflammatory cytokines ,such as TNF‐α,IL‐1 and IL‐6 in macro‐phages .Therefore ,SpA plays a very important role in the initiation and development of the staphylococcus aureus sepsis .

Objective To set internal quality control system of BCR-ABL(P210) transcript levels for real-time quantitative PCR (RQ-PCR).Methods Using K562 cells and HL-60 cells,we prepared high-and low-level BCR-ABL internal quality control substance.The BCR-ABL (P210) transcript levels of internal quality control substance have been determined for 184 times together with clinical samples from August 2013 to October 2015.The slope rate,intercept and correlation coefficient of standard curve were calculated according to different reagent lots (lots number 20130303,20131212,20140411 and 20150327 are called R1、R2、R3 and R4 for short respectively),and the detection results of quality control substance were calculated according to different reagent lots and quality control substance lots (lots number 20130725,20140611 are called Q 1、Q2 for short respectively).Then the results were analyzed by Levey-Jennings quality control chart combined with Westgard multi-rules theory.Results ①We analyzed the slope rate and intercept of standard curve.Fifty-three times of the R1 reagent detection,80 times of the R3 reagent detection and 14 times of the R4 reagent detection were all under control.For 37 times detection of R2 reagent,the slope rate was out of control for 6 times.It was lower than-x-s for the 2-8 tests and upper the average for the 12-37 tests.The intercept was out of control for 9 times,upper the-x+s for the 1-8 tests and lower the average for the 12-37 tests.②According to the detection results of quality control substance,for Q1 quality control substance,49 tests by R1 reagent were under control,and 1 out of 23 tests by R2 reagent was out of control.For Q2 quality control substance,14 tests by R2 reagent detection,72 tests by R3 reagent detection and 14 tests by R4 reagent were all under control.Conclusion The preparation of high-and low-level quality control substance using K562 and HL-60 cells was convenient and the detection results were reliable and stable.The application of quality control substance combined with slope rate and intercept in the internal quality control may contribute to quality assurance forquantitative detection of BCR-ABL (P210) transcript levels.

Objective To propose a CT truncated data reconstruction model(DDTrans)based on projection and image dual-domain Transformer coupled feature learning for reducing truncation artifacts and image structure distortion caused by insufficient field of view(FOV)in CT scanning.Methods Transformer was adopted to build projection domain and image domain restoration models,and the long-range dependency modeling capability of the Transformer attention module was used to capture global structural features to restore the projection data information and enhance the reconstructed images.We constructed a differentiable Radon back-projection operator layer between the projection domain and image domain networks to enable end-to-end training of DDTrans.Projection consistency loss was introduced to constrain the image forward-projection results to further improve the accuracy of image reconstruction.Results The experimental results with Mayo simulation data showed that for both partial truncation and interior scanning data,the proposed DDTrans method showed better performance than the comparison algorithms in removing truncation artifacts at the edges and restoring the external information of the FOV.Conclusion The DDTrans method can effectively remove CT truncation artifacts to ensure accurate reconstruction of the data within the FOV and achieve approximate reconstruction of data outside the FOV.

Objective To propose a CT truncated data reconstruction model(DDTrans)based on projection and image dual-domain Transformer coupled feature learning for reducing truncation artifacts and image structure distortion caused by insufficient field of view(FOV)in CT scanning.Methods Transformer was adopted to build projection domain and image domain restoration models,and the long-range dependency modeling capability of the Transformer attention module was used to capture global structural features to restore the projection data information and enhance the reconstructed images.We constructed a differentiable Radon back-projection operator layer between the projection domain and image domain networks to enable end-to-end training of DDTrans.Projection consistency loss was introduced to constrain the image forward-projection results to further improve the accuracy of image reconstruction.Results The experimental results with Mayo simulation data showed that for both partial truncation and interior scanning data,the proposed DDTrans method showed better performance than the comparison algorithms in removing truncation artifacts at the edges and restoring the external information of the FOV.Conclusion The DDTrans method can effectively remove CT truncation artifacts to ensure accurate reconstruction of the data within the FOV and achieve approximate reconstruction of data outside the FOV.

OBJECTIVETo investigate the possession of occupational health examination qualification among occupational health examination institutions in Zhejiang province, China and the application of GBZ188-2007 "Technical specifications for occupational health surveillance" among related government departments, and to provide a basis for revising and improving the specifications.

METHODSA questionnaire survey was carried out among occupational health inspection agencies, health supervision authorities, and enterprises of different sizes, which possessed provincial-level occupation health inspection qualifications and had engaged in occupational health examination for more than 2 years. The investigation included awareness, using frequency, and revision suggestion about GBZ 188-2007 "Technical specifications for occupational health surveillance".

RESULTSMedical institutions and centers for disease control and prevention (CDCs)showed a high rate of occupational health examination qualification possession in chemical substances, dust, noise, and high temperature and a low rate of qualification possession in physical factors, biological factors, special operations, and other aspects. These institutions showed high awareness of chemical substances, dust, and physical factors in GBZ 188-2007 "Technical specifications for occupational health surveillance" and low awareness of other factors. Medical institutions, CDCs, and provincial and municipal health supervision authorities used these specifications more frequently than county-level authorities and enterprises. More than 80% investigated units believed that the following issues required further optimization: occupational health care, emergency health examination regulations, classification of occupational health inspection reports, and special operation monitoring. It is consistently stressed that for exposure to chemical compounds that may bring harm to various organs of the body, explicit specifications should be made concerning health examination before, during, and after service. Conflicting opinions existed concerning the following issues: satisfaction with GBZ 188-2007 specifications, whether to add contents for care of personnel exposed to biological factors (such as forest encephalitis), the threshold of noise intensity to perform health care, and whether to add health care for exposure to compounds such as benzene and phenols.

CONCLUSIONThe occupational health inspection agencies in Zhejiang province have a high rate of qualification possession in health examination concerning chemicals, dust, noise, and high temperature. The medical institutions, CDCs, and health supervision departments above the county level often use the specifications at work. It is consistently recommended that more kinds of harmful substances should be included, and related specifications and issues should be further optimized, in order to better meet the requirement of occupational health care in the new era.

Objective To validate a cell infection-based quantitative RT-PCR for evaluating the potency of rotavirus vaccine. Methods According to the ICH ( the International Council for Harmonization) Harmonised Tripartite Guideline, the method was validated for its specificity, accuracy, precision, linearity and robustness. Results The method had good specificity as it could only amplify and detect the corre-sponding type of rotavirus strain. The recovery rates for determining the potency against rotaviruses of G2, G3 and G4 types were 97％ to 108％. The percent coefficient of variation ( CV) of both intra-plate and in-ter-plate precision was≤2. 62％, while the intraday and interday CV was≤1. 76％ and≤2. 27％, respec-tively. The CV between the two experimenters was≤7. 68％. The linearity range of the method was 4. 4-6. 5 UI for G2 type rotavirus, 3. 9-8. 3 UI for G3 type and 3. 5-8. 1 UI for G4 type. Good robustness was observed using the cells of 140 to 160 generations. Conclusions The cell infection-based quantitative RT-PCR was shown to have satisfactory specificity, accuracy, precision, linearity and robustness, suggesting that it was a suitable method for evaluating the potency of multivalent rotavirus live vaccines.

Objective:To explore the influence of storage and delivery conditions of the peripheral blood samples from patients with chronic myeloid leukemia (CML) on the real-time quantitative PCR (RQ-PCR) detection of the BCR-ABL (P210) transcript levels.Methods:The peripheral blood samples of 84 CML patients were collected. The same sample was divided into different groups according to storage time (0, 6, 12, 24, 48, and 72 h) , temperature (room temperature, 18-24 ℃; low temperature, 2-8 ℃) , and vibration conditions (3, 6, and 12 h) . RQ-PCR was used to detect BCR-ABL (P210) transcript levels of the different groups. This study logarithmically transformed (log 10N) the original data [BCR-ABL copy number, ABL copy number, and BCR-ABL (P210) transcript levels]. Results:①Agarose gel electrophoresis showed significant RNA degradation of samples after storage for 48 and 72 h at room temperature. ②Among the overall samples, the BCR-ABL copy number of the samples stored at room temperature for 48 and 72 h was significantly lower than that of the samples stored at low temperature ( P<0.05) . However, the BCR-ABL (P210) transcript levels had no significant difference between samples stored at low temperature and room temperature. ③No significant changes were noted in the BCR-ABL (P210) transcript levels at different storage times (6, 12, 24, 48, and 72 h) regardless of storage temperature ( P>0.05) compared with that at baseline (0 h, -0.56±1.51) . ④ The BCR-ABL copy number of the overall sample only decreased significantly ( P<0.05) at 48 h (2.93±1.59) and 72 h (2.79±1.42) compared with that at baseline (0 h, 3.35±1.60) when stored at room temperature. The ABL copy number in the overall sample decreased significantly at 48 and 72 h (whether low and room temperature; P<0.05) . However, no significant changes were noted in the BCR-ABL (P210) transcript levels after vibration for 3 h (-1.29±1.81) , 6 h (-1.24±1.72) , and 12 h (-1.18±1.68; P>0.05) compared with that at baseline (0 h, -0.60±1.37) . Conclusion:Sample storage time, storage temperature, and vibration can interfere with the results of BCR-ABL and ABL copy number but have no significant effect on the quantitative determination of BCR-ABL (P210) transcript levels. This study provides strong support for the feasibility of transregional transportation of peripheral blood samples from patients with CML.

Klebsiella pneumoniae(KPn),as a conditioned pathogen that causes calf pneumonia,has caused serious harm to cattle industry,but the harm of Klebsiella pneumoniae to calves in Xin-jiang region is still unclear.In this study,to investigate the prevalence of KPn,its harm and some biological characteristics of pneumonia calves in Xinjiang,nasal swabs of pneumonia calves in some areas were collected aseptically,KPn isolation and identification were performed by routine meth-od,and 16S rDNA sequence evolutionary tree analysis was performed.The drug resistance was de-tected by K-B method,and a strain carrying multiple virulence was selected for mice median lethal dose test.The serotype,virulence gene and drug resistance gene of the strain were detected by PCR.The results showed that the detection rate of Klebsiella pneumoniae in nasal swabs of 218 pneumonia calves from Aksu,Changji and Yili regions of Xinjiang was as follows:14.68％(32/218),including 28.33％(17/60)in Aksu Prefecture,24.00％(6/25)in Changji Prefecture and 6.77％(9/133)in Yili Prefecture,they were divided into two serotypes,namely K1(7/32)and K5(5/32).A total of 13 KPn virulence genes were detected,mainly mrkD,ureA,wabG,uge and en-tB.LD50 was 2.38X 107cfu/mL.Drug susceptibility test and drug resistance gene detection showed that the isolated strain showed multiple drug resistance,and the resistance genes mainly carried blasHv and floR.16S rDNA sequence evolutionary tree results showed that the isolated strain had high homology with the isolates from Italy,Beijing and Shanghai of China.The detection rate of KPn in nasal swabs of pneumonia calves in Xinjiang region is high.The dominant serotypes are K1 and K5.The isolates carry a variety of virulence genes and have strong virulence.All of them are KPn strains producing ESBLs,suggesting that Klebsiella pneumoniae in Xinjiang region of China have a certain potential harm to calves.

Objective: To analyze the correlation between circumcision and incidence and clearance of male genital HPV infection. Methods: From May to July 2014, 18-55 year old men who had sexual behavior history were recruited from the general population in Liuzhou, Guangxi to set up a cohort. Totally, 113 circumcised and 560 uncircumcised men were enrolled and interviewed using a questionnaire (including information on demographic characteristics and sexual behaviors), then they were followed-up with 6-month interval for 2 times. On each visit, specimens of male external genitalia were collected and genotyped for HPV DNA. The differences of incidence and clearance of genital HPV infections between circumcised and uncircumcised men were analyzed by Log-rank test. Cox regression was used to analyze the relationship between circumcision and incidence and clearance of HPV infection. Results: The median age (P₂₅, P₇₅) of circumcised and uncircumcised men were 28 (24, 35) and 32 (24, 31), respectively. The incidences of any HPV infections were 9.1 (95%CI: 2.4-15.7) and 8.4 (95% CI: 5.6-11.2) per 1 000 person-months (χ²=0.10, P=0.758), respectively. The clearance of circumcised men [136.3 (95%CI: 70.0-202.7) per 1 000 person-months] was higher than that in uncircumcised men [89.6 (95%CI: 65.9-113.3) per 1 000 person-months] (χ²=8.19, P=0.004). In multivariate COX regression analysis, compared with uncircumcised men, circumcised men had higher possibility to clear any HPV infections (HR: 2.41, 95%CI: 1.30-4.46). Compared with men having one sexual partner, people having more than 4 sexual partners had lower possibility to clear any HPV infections (HR: 0.49, 95%CI: 0.25-0.96). Compared with 18-25 years old men, men aged 26-35 years old had higher possibility to clear high-risk HPV infections (HR: 2.14, 95%CI: 1.08-4.23). Conclusion Circumcised and uncircumcised men had similar incidence of genital HPV infection, whereas, men conducted circumcision and having fewer sexual partners could increase the clearance of genital HPV infections.

OBJECTIVE: To develop a deep features-based model to classify benign and malignant breast lesions on full- filed digital mammography. METHODS: The data of full-filed digital mammography in both craniocaudal view and mediolateral oblique view from 106 patients with breast neoplasms were analyzed. Twenty-three handcrafted features (HCF) were extracted from the images of the breast tumors and a suitable feature set of HCF was selected using -test. The deep features (DF) were extracted from the 3 pre-trained deep learning models, namely AlexNet, VGG16 and GoogLeNet. With abundant breast tumor information from the craniocaudal view and mediolateral oblique view, we combined the two extracted features (DF and HCF) as the two-view features. A multi-classifier model was finally constructed based on the combined HCF and DF sets. The classification ability of different deep learning networks was evaluated. RESULTS: Quantitative evaluation results showed that the proposed HCF+DF model outperformed HCF model, and AlexNet produced the best performances among the 3 deep learning models. CONCLUSIONS The proposed model that combines DF and HCF sets of breast tumors can effectively distinguish benign and malignant breast lesions on full-filed digital mammography.
Breast Neoplasms ; classification ; diagnostic imaging ; Deep Learning ; Diagnosis, Computer-Assisted ; methods ; Female ; Humans ; Mammography ; methods