OBJECTIVETo investigate the occupational health condition in a shipyard in Guangzhou, China, and to provide a basis for improving the working environment.

METHODSThe monitoring data on occupational harmful factors in the workplace and the data on health examination of the workers were analyzed, and the occupational health condition in the shipyard was evaluated with the related occupational health standards.

RESULTSExcept benzene, toluene, and electromagnetic radiation, the dust (2.02%), grinding wheel dust (3.85%), wood dust (2 out of 4 workers exceeded the standard), welding fume (16.85%), manganese dioxide (17.98%), dimethylbenzene (8.00%), and noise (53.20%) were all out of limits to different degrees. The health examination results of 2450 workers in the shipyard showed that the respiratory impairment of dust-exposed workers (3.19%) and the hearing impairment of noise-exposed workers (12.21%) were comparatively severe.

CONCLUSIONThe occupational health condition in this shipyard is not good. In order to protect the workers from health hazards, it is urgent and necessary to improve the working environment and strengthen the personal protective measures.

Air Pollutants ; Benzene ; China ; Construction Industry ; Dust ; Humans ; Noise ; Occupational Diseases ; Occupational Exposure ; Occupational Health ; Ships ; Surveys and Questionnaires ; Welding ; Workplace

OBJECTIVETo investigate the application of risk grading and classification for occupational hazards in risk management for a shipbuilding project.

METHODSThe risk management for this shipbuilding project was performed by a comprehensive application of MES evaluation, quality assessment of occupational health management, and risk grading and classification for occupational hazards, through the methods of occupational health survey, occupational health testing, and occupational health examinations.

RESULTSThe results of MES evaluation showed that the risk of occupational hazards in this project was grade 3, which was considered as significant risk; Q value calculated by quality assessment of occupational health management was 0.52, which was considered to be unqualified; the comprehensive evaluation with these two methods showed that the integrated risk rating for this shipbuilding project was class D, and follow- up and rectification were needed with a focus on the improvement in health management.

CONCLUSIONThe application of MES evaluation and quality assessment of occupational health management in risk management for occupational hazards can achieve objective and reasonable conclusions and has good applicability.

Construction Industry ; Humans ; Occupational Health ; Risk Management ; Ships

Objective: To observe the therapeutic response of radiosynovectomy with p-32 colloid on hemophilic arthropathy, and to assess the effects of radiosynovectomy with Denver Score on hemophilic arthritis staging. Methods: Radiosynovectomy with p-32 colloid was performed on 326 hemophilic arthritis patients (405 joints) , and recorded bleeding before and after treatment. The MRI performance of 102 joints was evaluated by using Denver scoring system, then was divided into 0-6 and 7-10 groups. Finally, the differences between 2 groups were analyzed. Results: Average pain score of all hemophilic arthritis patients at 6 months, 1, 2 and 3 years post treatment decreased from 3.2±2.4 (n=326) to 1.2±0.6 (n=285, P=0.021) , 1.7±0.5 (n=242, P=0.032) , 2.1±1.1 (n=212, P=0.030) and 2.2±1.6 (n=176, P=0.037) , respectively. The frequency of bleeding in 405 joints at 1, 2 and 3 years post treatment decreased from 15.1±3.6 to 2.1±0.7, 4.3±0.6, and 4.8±0.8 times per year (P<0.01) , respectively; Meanwhile, the proportions of significantly ameliorated joints’ activities were observed as of 68.50% (248/362) , 58.39% (181/310) , 55.67% (162/239) and 42.61% (75/176) , respectively. The frequencies of haemarthrosis at 1 and 2 years post treatment in patients with 0-6 Denver Score (45 target joints) reduced from 13.0±1.9 to 1.3±0.6 (P=0.002) and 3.1±0.9 (P=0.009) times per year, respectively, which also decreased in 7-10 group (57 target joints) from 16.6±2.1 to 3.1±0.9 (P=0.008) and 5.7±1.1 (P=0.004) times per year, respectively. There was no statistical difference between 0-6 and 7-10 groups before treatment in the terms of haemarthrosis frequency (P=0.773) . However, 7-10 group had higher haemarthrosis frequency at 1 and 2 years post treatment compare with 0-6 group (P=0.028 and 0.042, respectively) . Synovial volumes in 29 joints reduced after 6 month when compared with baseline [ (2 362.15±32.41) mm³ vs (3 012.40±39.78) mm³, t=7.621, P<0.001]. Conclusion Radiosynovectomy with p-32 colloid on haemophilic synovitis was a safe and effective procedure. The patients with Denver Score of 0-7 had lower frequency of haemarthrosis.

Mycobacterium (M.) vaccae is a fast-growing species of saprophytic bacteria that is widely distributed. To understand the host immune responses induced by M. vaccae isolated from bovine submaxillary lymph nodes, C57BL/6 mice were infected with reference strain M. vaccae Bacillus Calmette-Guérin (BCG) and isolated M. vaccae using intraperitoneal injections. Comparison of the bacterial replication and organ pathology between M. vaccae and M. vaccae BCG revealed that M. vaccae was more malignant than M. vaccae in mice. We also demonstrated that serum from the M. vaccae-infected mice contained a higher expression level of gamma-interferon (IFN-γ), tumor necrosis factor alpha, monocyte chemoattractant protein-1, interleukin (IL)-4, IL-12, IL-10 and transforming growth factor beta than did the other groups, especially after week 4. Furthermore, when the numbers of CD3⁺CD4⁺IFN-γ⁺ and CD3⁺CD4⁺IL4⁺ cells in the infected mice were observed by flow cytometry, we found that a powerful T helper 1 (Th1) response was induced by M. vaccae infection, which was associated with the emergence of CD3⁺CD4⁺IFN-γ⁺ cells. However, the Th1 response declined over time, which was associated with appearance of the CD4⁺CD25⁺FoxP3⁺ and CD4⁺CD25⁺CD152⁺Treg cell reaction. In addition, a strong Th2 response was found. Finally, we found that M. vaccae infection increased the production of type I IFNs, which was associated with a reduced Th1 response.
Animals ; Bacillus ; Bacteria ; Chemokine CCL2 ; Flow Cytometry ; Injections, Intraperitoneal ; Interferon-gamma ; Interleukin-10 ; Interleukin-12 ; Interleukins ; Lymph Nodes ; Mice* ; Mycobacterium bovis ; Mycobacterium* ; Pathology ; Transforming Growth Factor beta ; Tumor Necrosis Factor-alpha

Objective:In this study, we compared the funding rates of applicants who participated in the expert preliminary counseling with those who did not, to explore the role of the expert preliminary counseling in improving the funding rate of the National Natural Science Fund, so as to provide further reference for the management of scientific research.Methods:Statistical methods was used to analyze relevant data from 2012 to 2019 to compare the approval and funding rate of the applicants that participated in and did not participate in the expert preliminary counseling using.Results:From 2012 to 2019, the proportion of funded applicants in the expert preliminary counselling group was 30.45%, and the overall funding rate was 18.51%. Under the same research basis, the funding rate of the group was 29.91%, which was significantly higher than the group did not participate in the expert preliminary counselling (funding rare: 13.59%, P<0.001). Conclusions:We should pay more attention to and participate actively in the expert preliminary counselling, which can increase the quality of the projects and improve their funding rate significantly.

Objective: To investigate the association between expression of phosphoglycerate kinase 1 (PGK1) in liver cancer tissue and prognosis, as well as its influence on metastasis and invasion of hepatocellular carcinoma (HCC) cells. Methods: Overexpression and downregulated expression of PGK1 in HCC cells were mediated by lentivirus to establish hepatoma cell lines with different expression levels of PGK1. The Transwell chamber invasion assay, wound healing assay, and colony-forming assay were used to investigate the influence of PGK1 on metastasis, invasion, and proliferation of HCC cells. Immunohistochemistry was used to measure the expression of PGK1 in liver cancer tissue samples from 116 patients with hepatocellular carcinoma who underwent radical surgery, and the Kaplan-Meier method and the log-rank test were used to determine the association between PGK1 expression and prognosis of patients with liver cancer. Results: HCCLM3 and MHCC97H HCC cells with high metastatic potential had significantly higher expression of PGK1 than Hep3B and Huh7 HCC cells with low metastatic potential. Downregulation of PGK1 expression significantly inhibited the migration (31.2% ± 2.4% vs 12.0% ± 1.3%, t = 21.57, P < 0.01), invasion (58 ± 11 vs 21 ± 8, t = 4.687, P < 0.05), and colony-forming ability (168.6 ± 15.1 vs 118.4 ± 8.1, t = 6.650, P < 0.05) of MHCC97H cells, while overexpression of PGK1 enhanced the migration (62.8% ± 4.4% vs 83.6% ± 6.1%, t = 20.56, P < 0.01), invasion (80 ± 12 vs 121 ± 15, t = 4.603, P < 0.05), and colony-forming ability (52.3 ± 8.6 vs 84.7 ± 9.0, t = 27.18, P < 0.01) of Hep3B cells. The high PGK1 expression group had significantly shorter median disease-free survival time and mean survival time than the low PGK1 expression group (22.00 ± 8.51 vs not reached, P < 0.05; 46.00 ± 16.87 vs not reached, P < 0.01). Conclusions PGK1 is involved in the regulation of metastasis and invasion of HCC cells and can promote the migration and invasion of HCC cells. Therefore, PGK1 may be an important predictor of prognosis and postoperative recurrence in patients with liver cancer.

Objective:To observe and verify the changes of transcriptome in hyperoxia-induced acute lung injury (HALI), and to further clarify the changes of pathways in HALI.Methods:Twelve healthy male C57BL/6J mice were randomly divided into normoxia group and HALI group according to the random number table, with 6 mice in each group. The mice in the normoxia group were fed normally in the room, and the mice in the HALI group was exposed to 95% oxygen to reproduce the HALI animal model. After 72 hours of hyperoxia exposure, the lung tissues were taken for transcriptome sequencing, and then Kyoto Encyclopedia of Genes and Genomes database (KEGG) pathway enrichment analysis was performed. The pathological changes of lung tissue were observed under light microscope after hematoxylin-eosin (HE) staining. Real-time fluorescence quantitative reverse transcription-polymerase chain reaction (RT-PCR) and Western blotting were used to verify the key molecules in the signal pathways closely related to HALI identified by transcriptomics analysis.Results:Transcriptomic analysis showed that hyperoxia induced 537 differentially expressed genes in lung tissue of mice as compared with the normoxia group including 239 up-regulated genes and 298 down-regulated genes. Further KEGG pathway enrichment analysis identified 20 most significantly enriched pathway entries, and the top three pathways were ferroptosis signaling pathway, p53 signaling pathway and glutathione (GSH) metabolism signaling pathway. The related genes in the ferroptosis signaling pathway included the up-regulated gene heme oxygenase-1 (HO-1) and the down-regulated gene solute carrier family 7 member 11 (SLC7A11). The related genes in the p53 signaling pathway included the up-regulated gene tumor suppressor gene p53 and the down-regulated gene murine double minute 2 (MDM2). The related gene in the GSH metabolic signaling pathway was up-regulated gene glutaredoxin 1 (Grx1). The light microscope showed that the pulmonary alveolar structure of the normoxia group was normal. In the HALI group, the pulmonary alveolar septum widened and thickened, and the alveolar cavity shrank or disappeared. RT-RCR and Western blotting confirmed that compared with the normoxia group, the mRNA and protein expressions of HO-1 and p53 in lung tissue of the HALI group were significantly increased [HO-1 mRNA (2 -ΔΔCt): 2.16±0.17 vs. 1.00±0.00, HO-1 protein (HO-1/β-actin): 1.05±0.01 vs. 0.79±0.01, p53 mRNA (2 -ΔΔCt): 2.52±0.13 vs. 1.00±0.00, p53 protein (p53/β-actin): 1.12±0.02 vs. 0.58±0.03, all P < 0.05], and the mRNA and protein expressions of Grx1, MDM2, SLC7A11 were significantly decreased [Grx1 mRNA (2 -ΔΔCt): 0.53±0.05 vs. 1.00±0.00, Grx1 protein (Grx1/β-actin): 0.54±0.03 vs. 0.93±0.01, MDM2 mRNA (2 -ΔΔCt): 0.48±0.03 vs. 1.00±0.00, MDM2 protein (MDM2/β-actin): 0.57±0.02 vs. 1.05±0.01, SLC7A11 mRNA (2 -ΔΔCt): 0.50±0.06 vs. 1.00±0.00, SLC7A11 protein (SLC7A11/β-actin): 0.72±0.03 vs. 0.98±0.01, all P < 0.05]. Conclusions:HALI is closely related to ferroptosis, p53 and GSH metabolism signaling pathways. Targeting the key targets in ferroptosis, p53 and GSH metabolism signaling pathways may be an important strategy for the prevention and treatment of HALI.

OBJECTIVE To explore the safety， effectiveness， and cost-effectiveness of elderly patients with sarcopenia receiving Shenling baizhu powder combined with nutrition and exercise intervention， providing a reference for rational clinical drug use. METHODS A total of 237 elderly sarcopenia patients were randomly assigned to an observation group （118 cases） and a control group （119 cases）. Both groups of patients received nutrition and exercise intervention； the observation group added Shenling baizhu powder （6 g each time， three times daily） on this basis. The safety， effectiveness， and cost-effectiveness of the two plans were compared after 3 months. RESULTS Both groups of patients completed the follow-up. Before intervention， no significant difference was observed in skeletal muscle index （SMI）， grip strength， and 6-minute walk test （6MWT） speed between the two groups （P＞0.05）. After intervention， the grip strength of the patients in the observation group was significantly greater than that of the control group （25.05 kg vs. 23.18 kg， P＜0.01）； the treatment response rate of sarcopenia， SMI， and 6MWT speed were higher than those of the control group， butthe differences were not statistically significant （P＞0.05）. The adverse reaction/event rate of the patients in the observation group was lower than that of the control group （14.41% vs. 16.81%， P＝0.611）， but the difference was not statistically significant. Compared with the control group’s plan， the cost of the observation group’s plan was higher （981.25 yuan vs. 913.94 yuan）， and the effect was better （effectiveness rate： 0.618 6 vs. 0.563 0）， with an incremental cost-effectiveness ratio of 1 210.61 yuan. The results of the sensitivity analysis were consistent with the cost-effectiveness analysis results. CONCLUSION Elderly patients with sarcopenia who receive Shenling baizhu powder combined with nutrition and exercise intervention can significantly strengthen grip strength without increasing the incidence of adverse reactions/events. Compared with the control group plan， the observation group needs to spend an additional 1 210.61 yuan for each additional effective patient with sarcopenia.