Objective To analyze the expression of ROCK2 in osteosarcoma tissues and explore its effect on the invasion and migration of osteosarcoma cells and related mechanism. Methods Real-time fluorescent quantitative PCR, Western blot and immunohistochemical staining were used to detect the expression of ROCK2 in osteosarcoma tissues. The migration and invasion of osteosarcoma cells were analyzed by wound-healing and Transwell assays after the knockdown of ROCK2 expression. The effect of reducing ROCK2 expression on metastasis in vivo was tested by tail vein metastasis experiment. We detected the expression of EMT-related proteins in osteosarcoma cells, and added the EMT inducer TGF-β to osteosarcoma cells with down-regulated ROCK2 expression to detect the changes of cell invasion and migration. Results The expression of ROCK2 in osteosarcoma tissues was significantly higher than that in corresponding adjacent tissues (P < 0.05). After down-regulating the expression of ROCK2 in osteosarcoma cells, the invasion and migration abilities in vivo and in vitro were significantly inhibited (P < 0.05). The expression of EMT-related protein E-cadherin decreased, while N-cadherin and Vimentin proteins increased significantly. Inducing EMT could attenuate the inhibitory effect of down-regulating ROCK2 on the invasion and migration of osteosarcoma cells. Conclusion The expression of ROCK2 is increased in osteosarcoma tissues, which promotes the invasion and migration of osteosarcoma cells by inducing EMT. ROCK2 may be a potential biomarker for targeted therapy of osteosarcoma.

Objective To explore the limits of fluid-inversion prepared diffusion weighted imaging (FLIPD) in detection of acute cerebral ischemic lesions.Methods From January 2012 to March 2014,forty-nine patients (33 males,16 females,age (55.6± 12.3) years) clinically diagnosed as transient ischemic attack (TIA) were included.Patients underwent brain MRI (conventional diffusion weighted imaging (DWI) and FLIPD) within 3 d after the onset of TIA.The detection ability of MRI with the two sequences was compared,and the relative signal intensity (rSI) and apparent diffusion coefficient (ADC) of acute ischemic lesions based on two sequences were compared.Kappa test and two-sample t test were used to analyze the data.Results A total of 87 acute ischemic lesions were detected in 21 patients by conventional DWI,and 54 were detected in 19 patients by FLIPD (Kappa=0.916,P＜0.05).The rSI of ischemic lesions on FLIPD was significantly lower than that on conventional DWI (1.37±0.22 vs 1.57±0.26;t=6.647,P＜0.001).The ADC value of ischemic lesions on FLIPD was slightly lower than that on conventional DWI:(0.54 ±0.10) ×10-3 mm2/s vs (0.57±0.13)×10-3 mm2/s (t=2.120,P＜0.05).The missed lesions on FLIPD were located in the white matter (n =18),cerebellum and brainstem (n =8),and the cortex (n =7).Conclusions A slight diffuse abnormality may be missed on FLIPD,so this method is not suitable for the detection of acute ischemic lesions.FLIPD technology still needs improvement.

Primary hepatic carcinoma（PHC）is the second leading cancer that caused death in the world. The morbidity of PHC is increasing year by year,which threaten people's lives and health. Chronic hepatitis B is considered to be an independent risk factor for PHC,and the incidence of PHC is higher in patients who have progressed to liver cirrhosis. We reviewed the domestic and abroad literatures about the risk factors for hepatitis B cirrhosis progressing to PHC from the year of 1992 to 2018,and concluded that HBV-DNA,HBsAg,HBeAg expression,antiviral treatment time,different antiviral drugs,degree of cirrhosis,alanine transaminase and family history were related to the development of PHC from cirrhosis.

Objective: ICMM occupational health risk assessment model was be used to evaluate the risk of a lead-acid battery enterprise. Methods: In November 2016, a lead-acid battery company in Jiangsu Province was selected as the research object. Based on the occupational health survey data and occupational hazard assessment reports, the ICMM risk assessment model was used to conduct occupational health risks in eight key positions of a lead-acid battery enterprise. The risk assessment results was verified by actual test results. Results: In the quantitative assessment model, the occupational health risk assessment results for the castings and welding positions exposed to lead smoke, and the occupational health risk assessment results for the grinding and dividing positions exposed to lead dust existed unacceptable risks. The occupational health risk assessment results for the ball-milled and plated positions exposed to lead dust existed tolerable risks. The occupational health risk assessment results for the lead-plated and soldered positions exposed to sulphuric acid pastes and acids existed potential risks. In qualitative evaluation matrix method, the occupational health risk assessment results for the castings and welding positions exposed to lead smoke, and the occupational health risk assessment results for the grinding and dividing positions exposed to lead dust existed high risks, the occupational health risk assessment results for other four key positions were considered to be with low risks. Conclusion The key control points for lead smoke in this enterprise were castings and welding positions; The key control points for lead dust were the grinding and separating brush positions. The quantitative assessment model and the qualitative assessment matrix method in the ICMM model were consistent with the actual test results in the eight health risk assessments of occupational hazards in key positions. Therefore, the method could be applied to the assessment of occupational health risks of the lead-acid battery enterprise. According to the results of the assessment, improvements could be made to high-risk positions and the concentration of occupational hazards in high-risk posts could be reduced to better protect the health of workers.

OBJECTIVE: To compare the applicability of three risk assessment methods on occupational health risk assessment of chemical harmful factors in lead-acid battery manufacturers. METHODS: The convenient sampling method was used to select six lead-acid battery enterprises as research subjects. The occupational health risks of jobs with lead smoke,lead dust and sulfuric acid were determined by contact ratio method,comprehensive index method( both are semiquantitative evaluation method) and qualitative risk assessment method. The assessment was carried out,and the obtained risk level was standardized as the risk ratio. The evaluation results of these three methods were compared. RESULTS: For occupational health risk levels of lead smoke,lead dust and sulfuric acid,the contact ratio assessment method were 2-4,and the comprehensive index method were 2-3. The risk ratios after standardization were consistent with the risk level of that before standardization. The result of the qualitative risk assessment method was 2-3,and the standardized risk ratio was 3-4. The risk ratio of each post after standardization increased by one level compared with the risk level before standardization. When( Exposure limit concentration,E)/( Occupational exposure limit,OEL) ≥ 2,the occupational health risk levels of lead smoke,lead dust of qualitative risk assessment method and the contact ratio method were completely consistent,both of which were high risk,which were higher than the medium risk result of the comprehensive index method. When E/OEL < 2,Kappa analysis results showed that the contact ratio method and the comprehensive index method were in good agreement( Kappa = 0. 84,P < 0. 01). The qualitative risk assessment method were inconsistent with the contact ratio method and the comprehensive index method( Kappa value were -0. 22 and -0. 24). CONCLUSION: For occupational health risk assessment of chemical harmful factors in lead-acid battery manufacturers,the comprehensive index method could be used to evaluate the comprehensive results of occupational disease hazard factors and OEL in workplace. A qualitative risk assessment method can be used for assessment without test method or OEL of occupational hazard factor.

Objevtive To investigate the efficacy of Xuebijing injection combined with Ulinastatin for acute pancreatitis.Methods Databases were searched,like Pubmed,Embase,Cochrane Central Register of Controlled Trials (CENTRAL),China Biology Medicine disc (CBM),China National Knowledge Infrastructure (CNKI),Cochrane library,and Wangfang for randomized controlled trial (RCT) about the treatment of Xuebijing injection combined with Ulinastatin for acute pancreatitis.After evaluating the quality of literatures objectively,data were analyzed by RevMan 5.0 software.we evaluated abdominal pain relief time,recovery time of blood amylase,recovery time of white blood cell (WBC),concentration of interleukin (IL)-6,IL-8,tumor necrosis factor α (TNF-o) and total effective rate.Results Eleven studies and 893 patients were accepted into this article.Meta-analysis showed that abdominal pain relief time [weighted mean difference (WMD) =-1.71,95 ％ CI:-2.21,-1.21,P ＜ 0.01],recovery time of blood amylase (WMD =-1.82,95 ％ CI:-2.39,-1.25,P ＜ 0.01),recovery time of WBC (WMD =-2.75,95 ％ CI:-3.19,-2.31,P ＜ 0.01),and hospital stay time (WMD =-5.99,95 ％ CI:-7.73,-4.26,P ＜ 0.01)in experimental group was better than control group.Compared to control group,on the seventh day after treatment,inflammatory cytokines,including IL-6 [standardized mean difference (SMD) =-1.09,95％ CI:-2.66,0.48,P=0.17],IL-8 (SMD=-1.02,95％ CI:-1.66,-0.38,P＜0.01),andTNF-α (SMD =-1.10,95％ CI:-1.68,-0.53,P ＜ 0.01) were lower.In experimemal group,total effective rate was better than the control group (RR =1.16,95％ CI:1.07,1.25,P=0.0002).Conclusions Xuebijing injection combined with Ulinastatin for acute pancreatitis was more effective than traditional basal treatment or using Ulinastatin alone.However,the literature quality were mediocre,we need more large,random,double blind,and polycentric clinical study to prove further.

Objective To observe the effect of Sirt1 on the phosphorylation of Tau protein in neuroblastoma SK-N-SH cell line.Methods We cultured SK-N-SH cells in vitro with adenovirus packaging of Sirt1 and SirtM (Sirt mutant),and then observed the expression of Sirt1 under an inverted fluorescence microscope.The expressions of Sirt1and SirtM were detected by Western blot;t-Tau protein and phosphorylation of Tau protein were detected by Western blot,Real-time PCR,immunohistochemistry and immunofluorescence;and the effect of Sirt1 on SK-N-SH apoptosis was investigated by flow cytometry.Results The t-Tau protein level and its phosphorylation were significantly decreased in Sirt1 and SirtM groups compared with those in control group,and Sirt1 group showed more significantly decreased ser404,thr231 phosphorylation of tau protein and the mRNA level of Tau.Flow cytometry showed that Sirt1 could significantly reduce the apoptosis of SK-N-SH cells compared with the control group.Conclusion Sirt1 can decrease the phosphorylation of Tau protein and reduce the apoptosis of SK-N-SH,which provides an important laboratory basis for studies on Tau protein disease and other neurodegenerative diseases.

Objective To investigate the changes and clinical significance of neck-shaft angle in the treatment of proximal humerus fractures with locking plate.Methods A retrospective case-control study was done on 214 cases of proximal humerus fractures treated with locking plate in our hospital from January 2008 to June 2016.According to the presence of medial bone defects,the cases were divided into medial bone defect group (85 cases) and non-medial bone defect group (129 cases).In medial bone defect group,there were 35 males and 50 females,with an average age of 63.3 years old.In this group,the cases of Neer three-part fractures and Neer four-part fractures were 47 and 38,respectively.In non-medial bone defect group,there were 51 males and 78 females,with an average age of 65.9 years old.In this group,the cases of Neer three-part fractures and Neer four-part fractures were 57 and 72,respectively.The preoperative humeral neck-shaft angle of contralateral humerus,and the humeral neck-shaft angle with its changes on the second postoperative day as well as 1,3,6 and 12 months after surgery were evaluated by the X-ray film.The Constant scores of the shoulder function were also assessed.Results The follow-up time for the patients ranged from 12 to 42 months (mean 24.2 months).In medial bone defect group,the preoperative neck-shaft angle of contralateral humerus,as well as neck-shaft angles of fractured side at five follow-up visits were (133.4±4.0) °,(134.7 ±11.5) °,(120.8±4.0) °,(118.5 ±3.5) °,(117.9 ±10.4) °and (114.7 ±4.4)°,respectively.While in the other group,the corresponding parameters were (134.0±2.4)°,(133.8± 17.1)°,(135.6± 2.9)°,(132.7± 2.8) °,(131.5 ± 13.5) °,(135.2 ± 2.8) °,respectively.There were significant differences between the two groups of the neck-shaft angle at 1,3,6 and 12 months (P ＜ 0.05).In the medial bone defect group,there were no significant differences between neck-shaft angle of contralateral humerus and the second postoperative day (P ＞0.05),but both of them are significantly greater than others(P ＜0.05).In the other group,except for the neck-shaft angles of postoperative 1 month and 6 months (P ＜ 0.05),there was no statistically significant difference between the angles in different time points(P ＞ 0.05).The mean Constant scores of medial bone defect group and no medial bone defect group were (69.3 ± 14.6) and (75.2 ± 12.6),respectively.Conclusions After the recovery of neck shaft angle,there is still a need of attention to the losses of neck shaft angle after surgery.Neck-shaft angle could be a reference for the treatment strategy of proximal humerus fractures with locking plate,which could guide the anatomical reduction as well as be used to evaluate the effects after surgery.It could also be a reference for function exercise.Moreover,the losses of neck shaft angle will be influenced by supporting from internal side,which could have effects on the function recovery after surgery.

BACKGROUND:Because of complicated biomechanics of lumbar vertebra, mast facet osteoarthritis, degenerative joint disease and vertebral subluxation usual y occur fol owing lumbar fusion. To avoid adjacent segment disease, researchers have transformed strong internal fixation into elastic fixation, but the treatment outcomes are barely satisfactory. Furthermore, factors involving adjacent segment disease remain unclear. OBJECTIVE:To explore the relationship between L3-4 segment disease fol owing lumbar fusion and gender. METHODS:200 patients undergoing lumbar fusion of L4-5 and L5-S1 in the First Hospital of Shijiazhuang ranging from 2007 to 2016 were enrol ed, and then al otted into male and female groups (n=100 per group) for retrospective analysis. The incidence of L3-4 segment disease was compared between two groups. RESULTS AND CONCLUSION:Compared with the male group, in the female group, the incidence of L3-4 segment diseases at different fusion locations and ranges, the Oswestry disability index and visual analogue scale and each migration range were significantly higher. Logistic regression analysis showed that gender was one of the independent factors of L3-4 segment disease following lumbar fusion of L3-4 and L5-S1. These findings suggest that gender is one of the influencing factors of L3-4 segment disease after instrumented lumbar;thereby, adjacent segment disease occurs frequently in female patients.