Objective To analyze the effect of residual cholesterol (RC) on hearing loss in noise-exposed workers. Methods A total of 3 412 workers engaged in noise operation work in an underground railway enterprise were selected as the research subjects using the judgment sampling method. Their occupational health examination data were collected to analyze the relationship between RC and hearing loss. Results The noise intensity of workplace in the underground rail enterprise was 80.0-85.0 (81.4±3.2) dB(A). The detection rate of hearing loss was 20.2% (691/3 412). The rates of abnormal total cholesterol, triacylglycerol, high density lipoprotein cholesterol (HDL-C) and low density lipoprotein cholesterol were 35.6%, 25.7%, 9.5% and 42.4%, respectively. The median and the 25th and 75th percentiles [M(P₂₅,P₇₅)] of RC level were 0.24 (0.15, 0.37) mmol/L. The levels of total cholesterol, triacylglycerol and RC of workers in hearing loss group were higher than those in normal hearing group [M(P₂₅,P₇₅): 4.91(4.37, 5.58) vs 4.84(4.30, 5.46) mmol/L, 1.29(0.91, 1.93) vs 1.16(0.82, 1.67) mmol/L, 0.26(0.16, 0.41) vs 0.24(0.14, 0.37) mmol/L, all P<0.05]. The detection rate of hearing loss in abnormal triglyceride group was higher than that in normal triglyceride group (24.8% vs 18.7%, P<0.01), and the detection rate of hearing loss in abnormal HDL-C group was higher than that in normal HDL-C group (25.0% vs 19.8%, P<0.05). The higher the serum RC level, the higher the detection rate of hearing loss (P<0.01). Multivariate logistic regression result showed that individual with older age, longer work time and higher serum RC level had higher risk of hearing abnormality (all P<0.05), and the risk of hearing abnormality was higher in patients with abnormal fasting blood glucose than patients with normal faseing blood glucose (P<0.05) after controlling for confounding factors such as gender, alcohol consumption, body mass index, and elevated blood pressure. However, abnormal triacylglycerol and HDL-C levels were not significantly related to the risk of hearing abnormality (both P>0.05). Conclusion Serum RC levels are an independent risk factor for hearing loss among noise-exposed workers exposed to noise level of 80.0-85.0 dB(A) in the workplace.

Objective To investigate the impact of silymarin(SM)on the malignant growth of glioma cells and the regulatory mechanism on the miR-124-3p/WEE1 axis.Methods Glioma U87 cells were grouped into control,SM low,medium,and high concentration groups,and SM high concentration + miR-124-3p inhibitor group(SM high + miR-124-3p inhibitor group).CCK-8 was used to measure the proli-feration rate of cells;Transwell? assay was applied to assay the migration and invasion of cells;cell cycle progression was detected by flow cytometry;Western blotting was applied to measure the expression of cyclin D1 and apoptosis-related proteins;the levels of miR-124-3p and WEE1 mRNA were determined by qRT-PCR;and a luciferase activity test was applied to verify the targeting relationship between miR-124-3p and WEE1;in addition,the establishment,administration,and analysis of a NOD/SCID mouse model of intracranial trans-planted tumor were conducted.Results Compared with the control group,the cell proliferation,the numbers of migrating and invading cells,the expression of cyclin D1,and the level of WEE1 mRNA in the various SM treatment groups decreased,the number of cells in G0/G1 phase,the expression of cleaved caspase-8,cleaved caspase-9,cleaved caspase-3 and miR-124-3p increased(P＜0.05);furthermore,transfection of miR-124-3p inhibitor reversed the inhibitory effect of SM on the malignant behavior of glioma cells.In vivo experiments with mice showed that the weights and volumes of tumors in the SM treatment group were lower than those in the model group(P＜0.05),and there was no discernible change in the weight of the mice(P＞0.05).Conclusion SM can inhibit the malignant growth of glioma cells by upregulating miR-124-3p and downregulating WEE1.

Objective:To investigate whether the bladder neck descent and the area of levator ani hiatus obtained on the maximum Valsalva were consistent at the lithotomy position and separating-legs-holding-knees position.Methods:Forty four subjects who underwent perineal pelvic floor four-dimensional ultrasound at 6-8 weeks postpartum in Third Hospital of Longgang Shenzhen from November 2019 to January 2020 were enrolled in this study. All subjects were able to effectively complete the maximum Valsalva maneuver both at the lithotomy position and the separating-legs-holding-knees position. The bladder neck descent and hiatus area of the levator Ani on the maximum Valsalva at these two positions were measured and compared.Results:The bladder neck descent at the separating-legs-holding-knees position was higher than that at the lithotomy position [(41.06±8.25)mm vs (39.96±8.10)mm; t=-2.965, P=0.005], and the hiatus area of levator Ani at the separating-legs-holding-knees position was larger than that at the lithotomy position[(27.55±4.90)cm 2 vs (26.32±4.76)cm 2; t=-3.820, P<0.001]. Conclusions:The bladder neck descent and the area of levator Ani hiatus on the maximum Valsalva at separating-legs- holding-knees position are larger than those on the maximum Valsalva at the lithotomy position.

Objective To explore expression and significance of growth differentiation factor (GDF)-15 in pituitary adenomas.Methods A total of 100 tissue samples of patients with pituitary adenomas were selected and divided into invasive pituitary adenomas group (n =63) and non-pituitary adenomas group (n =37) according to aggressive condition,and 50 healthy people were selected as control group.The expression of GDF-15 was compared among the three groups,and the correlation between GDF-15 and the invasiveness of pituitary adenomas was analyzed.Results The level of GDF-15 in patients with prolactin secreting pituitary adenomas and growth hormone adenomas was significantly higher than that of patients with non-functional pituitary adenomas (P ＜ 0.05).The level of GDF-15 in the invasive pituitary adenomas group was significantly higher than the non-invasive group and the control group (P ＜ 0.05).The correlation analysis showed that there was a positive correlation between GDF-15 and invasive pituitary adenomas (r =0.328,P =0.001).Conclusion In patients with pituitary adenomas,the expression of GDF-15 is higher,and there is a correlation between the GDF-15 level and the invasiveness of pituitary adenomas.

Objective To explore expression and significance of growth differentiation factor (GDF)-15 in pituitary adenomas.Methods A total of 100 tissue samples of patients with pituitary adenomas were selected and divided into invasive pituitary adenomas group (n =63) and non-pituitary adenomas group (n =37) according to aggressive condition,and 50 healthy people were selected as control group.The expression of GDF-15 was compared among the three groups,and the correlation between GDF-15 and the invasiveness of pituitary adenomas was analyzed.Results The level of GDF-15 in patients with prolactin secreting pituitary adenomas and growth hormone adenomas was significantly higher than that of patients with non-functional pituitary adenomas (P ＜ 0.05).The level of GDF-15 in the invasive pituitary adenomas group was significantly higher than the non-invasive group and the control group (P ＜ 0.05).The correlation analysis showed that there was a positive correlation between GDF-15 and invasive pituitary adenomas (r =0.328,P =0.001).Conclusion In patients with pituitary adenomas,the expression of GDF-15 is higher,and there is a correlation between the GDF-15 level and the invasiveness of pituitary adenomas.

Command of the JCI standards and lessons learnt from practice and experience in JCI accreditation preparation,can help identify the gap between the hospitals and JCI standards.These standards can also guide the clinical pathway system,pharmacy intravenous admixture services system and medical business intelligence system.The information system built under such guidance not only makes an effective solution to existing problems,but also proves innovative.All these pave the way for successful JCI accreditation.

Objective: To further optimize the hospital inspection process, shorten the patient waiting time of examination and improve the overall utilization of medical equipment. Methods:HIS and PACS to realize the information system integration by using hospital information platform, and then develop a set of medical equipment reservation system. The doctor workstation through the system could real-time help patient appoint check items, and eliminate patients to check the front desk or reservation center reservation registration steps. Results:The successful application of medical equipment reservation system not only optimize hospital inspection process, shorten the patient waiting in line inspection time, but also increase the utilization rate of MR equipment by 35%. Conclusion: The use of medical equipment reservation system saves the patient queuing registration, waiting for the examination of the time, and improve the utilization rate of hospital medical equipment, create economic benefits for the hospital and brought widespread popularity and reputation for the hospital.

Objective:This study aimed to clarify the correlation of SPRY4-IT1 expression with the clinicopathological character-istics and prognosis of patients with esophageal squamous cell carcinoma (ESCC), as well as the role of SPRY4-IT1 in promoting ES-CC cell growth. Methods:Quantitative real-time polymerase chain reaction for SPRY4-IT1 expression was performed on 50 paired can-cerous and adjacent non-cancerous esophageal specimens. Small interfering RNA was used to suppress SPRY4-IT1 expression to fur-ther explore its role in tumor progression. Cell viability was tested in vitro by MTT assay (OD=490 nm), and cell apoptosis and cell cy-cle were investigated by flow cytometry. Results:We found markedly elevated SPRY4-IT1 expression in cancerous tissues compared with adjacent non-cancerous tissues (90%, P<0.01). Relative SPRY4-IT1 expression levels were correlated with some clinicopathologi-cal characteristics, such as tumor size (χ2=5.333, P=0.021), elevated TNM (2009) stage classi fi cation (χ2=5.556, P=0.018), and de-creased overall survival rates (χ2=5.296, P=0.021). SPRY4-IT1 expression level was not correlated with patient age, gender, smoking status, or alcohol consumption (all P>0.05). Further experiments showed that SPRY4-IT1 expression levels were significantly higher in three ESCC cell lines than in the normal human esophageal epithelial cell line Het-1A. In vitro assays of the ESCC cell line KYSE30 demonstrated that knockdown of SPRY4-IT1 expression by small interfering RNA reduced cell growth, mediated cell cycle arrest at the G0-G1 phase, and promoted cell apoptosis (all P<0.01). Conclusion:SPRY4-IT1 was overexpressed in ESCC tissues and ESCC cell lines and promoted the growth of ESCC cells. The dysregulated expression of long non-coding RNA SPRY4-IT1 may play an important role in the process of ESCC development and may be developed as a useful biomarker for the diagnosis and prognosis of ESCC.

Objective To establish a rabbit model of radiation-induced skeletal muscle injury in order to study the ultrastructural pathological changes and underlying mechanism.Methods 28 New Zealand rabbits were randomly divided into 2 groups with 16 rabbits in experimental group and 12 rabbits in control group.The experimental rabbits were irradiated on hip with a single dose of 80 Gy of 9 MeV electrons from a linear accelerator.1 month and 6 months after irradiation the pathological changes were respectively observed under light microscope and electron microscope.Results One month after irradiation,the morphologic changes including degeneration,necrosis of muscle cells,and hemorrhage between the muscle cells were observed under light microscope and the swelling of myofibrillae,blurring of light and shade band,vacuolar degeneration of mitochondria and amorphous areas of necrosis were observed under electron microscope.Six months after irradiation,the morphologic changes of nucleolus chips,fibrous connective tissue,thickening of vascular wall and vascular congestion between the muscle cells and the amorphous areas of necrosis in the experimental group were much more serious than those of 1 month after irradiation.In addition,the myofilaments were lost in degeneration areas and the sarcomere became shorten.Observation with electron microscope showed that the mitochondrial size and its morphological changes were varied and the amounts of collagen between myofibrillaes were increased 6 months after irradiation.Conclusions A rabbit model of high-dose irradiated skeleton muscle injury was successfully established with a single dose of 80 Gy of 9 MeV electrons from a linear accelerator.The degeneration and necrosis of muscle cells may be promoted by mitochondrial and vascular injury,degeneration of vessel and nerve fiber.

Objective To evaluate the safety and efficacy of 125I radioactive seeds implantation combined with postoperative chemotherapy as a treatment option for thoracic advanced esophageal squamous cell carcinoma(ESCC). Methods A prospective cohort study was carried out between 2000and 2005. According to preoperative CT staging criteria,298 patients in phase Ⅱ-Ⅲ of ESCC, who had were admitted to Oncology Center Surgery of Nanjing First Hospital Affiliated to Nanjing Medical University and Thoracic Surgery of YanCheng Oncology Hospital, were randomly divided into three groups: intraoperative 125I seeds implantation combined with postoperative chemotherapy (group A, 98cases), postoperative chemoradiotherapy (group B, 100 cases) and surgery alone (group C, 100cases). All patients received radical resection of esophageal cancer. According to pTNM staging criteria after operation, 233 patients in phase Ⅱb-Ⅲ of ESCC were finally enrolled in the study (78 in group A, 75 in group B, and 80 in group C). With 0. 5 m Ci of single seed, total activity of 5-11 mCi and matched peripheral dose in 60-70 Gy, 10-22 125I seeds were implanted into the target of patients in group A under direct vision in accordance with treatment planning system. The validation and quality assessment of radioactive seeds were demonstrated according to CT scan or X-ray imaging. The postoperative complications were observed. The local recurrence of the cancer was demonstrated using CT scan. The survival rate of patients was followed up for 1-,3-,5- and 10 years. Results The satisfied quality assessment of 125I seeds was observed. There was no displacement or loss of seed. The local recurrence in group A, B and C was 11. 5%, 13. 3% and 38. 8%, respectively, with statistical significance (P ＜ 0. 05). There was no significant difference among three groups with respect to complications and 1-year survival (P＞0. 05). However, the overall survival rate 3-, 5- and 10-years was 64.8%,37. 7% and 25. 1% in group A respectively; 63.3%, 36.9% and 24.9% in group Brespectively; 43. 6i%, 25.0%, and 12.6% in group C, respectively (all P＜0. 05). The 3-,5- and 10-year progression free survival rates were 63.5 %, 37.4 % and 15.1% in group A respectively; 62.5 %,36.6% and 14. 4% in group B respectively; 42.5%, 25.6% and 6.2% in group C respectively (all P＜0. 05). Conclusions It is a safe, effective and simple method for intraoperative 125I seeds implantation combined with postoperative chemotherapy in treatment of advanced ESCC, which may reduce the local recurrence and improve survival rates in patients with ESCC.