Objective To construct eukaryotic expression vector of human antimicrobial peptide LL-37 pPIC9-LL-37, and transform the plasmid pPIC9-LL-37 into P.pastoris GS115 to obtain the recombinant P.pastoris strains.Methods The full-length of antimicsobial peptide LL-37 gene was artificially synthesized by overlap extension method and was fused to pPIC9 and then the fused plasmid was transformed into E.coli DH5?.After analysis by PCR and sequencing,the plasmid pPIC9-LL-37 was transformed into P.pastoris.The colonies exhibiting the phenotype of His+Mut+ or His+Mut-were screened by means of MM and MD plates and the insertion was confirmed by PCR.Results The results of PCR and sequencing confirmed that the LL-37 gene was correctly inserted into pPIC9. The colonies of 10 His+Mut+ and 9 His+Mut-were obtained by means of MM and MD plates screening and were confirmed by PCR.Conclsion The recombinant P.pastoris strains containing LL-37 were successfully obtained.

Objective To investigate the distribution of eosinphililic neurons ( ENs),reactive astrocytes ( RAs),and infarction after transient cerebal ischemia,and the time profile of pathomorphological changes.Methods Unilateral forebrain ischemia was induced in Mongolian gerbils by two 10 minutes unilateral common carotid artery occlusions with a 5 hours interval.Laser Doppler flowmetry was used to detect intra-ischemic anterior cortex blood flow.Animals were sacrificed at 24 hours,4 days,2 weeks,4 weeks,16 weeks and the brain were prepared for pathomorphological assay.Results Intra-ischemic laser Doppler flowmetry show significant ischemia during carotid artery occlusion:22.1％ ± 9.5％,26.3％ ± 4.9％,37.5％ ± 3.5％,F =67.219,P ＜ 0.01 ; the decrease was significantly greater in the anterior cortex.ENs appeared in middle and deep layers at 24 hours postischemia,and ENs area extend to all layers of cortex by 4 days.Large areas of high EN density ( ≥80/mm2) evolved to infarcts between 4 days and 4 weeks.Posterior cortex evolved to low EN area ( ＜ 80/mm2) without transformation into infarcts.RAs were consistently distributed in areas with ENs,and RA areas with high EN density were largely transformed into infarcts between 4 days and 4 weeks. Delayed astrocytic death took place in the RA areas with high EN density.Conclusion Density of ENs is an important indicator of delayed astrocytic death and infarction in postischemic tissue.

Experimental course of pathology is a very important part of pathology teaching.Motivation of students was promoted through improving the professional knowledge of teachers,using teacher-student interacted teaching methods,increasing network courscs,using multimedia in teaching and adding extracurricular practice in our university.In the meantime,it was successful and fruitful to use diversified evaluation systems to assess the comprehensive experimental capacity of students,which can provide experiences in reform of pathological experimental teaching.

Objective:To investigate the effect ofLeech Capsule on stability ofcarotid plaque and expression ofplatelet membrane glycoprotein in patients with cerebral arteriosclerosis.Methods:203 patients with cerebral arteriosclerosis which with unstable carotid plaque were divided into two groups.There were 101 patients in observation group which were treated by conventional therapy and Leech Capsule, and 102 patients in control group which were treated only by conventional therapy.Then comparison analysis ofIMT, plaque area, unstable plaque number and positive rates ofPAC-1 and CD62P were made before and after treatment with two groups.Results:After treatment, the IMT, plaque area, unstable plaque number and positive rates ofPAC-1 and CD62P in observation group were significantly lesser than those in control group.In observation group, all parameters after treatment were significantly lesser than those before treatment, but in control group there were no significant difference in IMT and positive rates ofCD62P between after treatment and before treatment.In addition, there were no obvious adverse reactions after treatment by leech capsule.Conclusion:Leech Capsule was an effective drug for stabilizing carotid plaque and depressing the level ofplatelet activation, and it had few adverse reaction.It was worth further spreading.

Objective: To investigated the effect of long-term low-concentration mixed benzene exposure on peripheral blood of male workers. Methods: A case-control study was conducted to select 452 male workers exposed to mixed benzene (benzene, toluene, xylene) for five consecutive years from January 2012 to December 2016 in an automobile manufacturer as case group, and 438 male administrative and logistic managers who underwent physical examination during the same period as control group. The peripheral blood of the two groups was tested and compared, and the occupational hazards in the workplace were detected. Results: There were low dose exposure to mixed benzene in the enterprise, but the test results met the occupational exposure limit requirements. During the five years from 2010 to 2016, between the two groups of workers, the mean values of WBC, NEUT, RBC and Hb were statistically different (P<0.05). There was no statistical difference (P>0.05) in the mean value of PLT. The abnormal rate of main peripheral blood indexes in the control group was higher than that in the exposed group. There were significant differences in NEUT, RBC and Hb (P< 0.05), but no significant differences in WBC and PLT (P>0.05). Conclusion It can not be concluded that long-term low-concentration mixed benzene exposure can cause the change of peripheral blood index.

ObjectiveTo analyze the epidemiological characteristics of newly diagnosed occupational welder's pneumoconiosis (OWP) in the shipbuilding industry in Guangzhou City from 2006 to 2022. Methods Data on newly diagnosed OWP cases in the shipbuilding industry in Guangzhou City from 2006 to 2022 was collected and ananlyzed from the Health Hazard Monitoring Information System subsystem of the Chinese Disease Prevention and Control System. ResultA total of 250 cases of new welder's pneumoconiosis were diagnosed in the shipbuilding industry in Guangzhou City from 2006 to 2022. The number of new cases per year showed an initial increase followed by a rapid decline, reaching a peak in 2013 (65 cases). Most of the cases were male, accounted for 99.2%. There were 220 cases reported the OWP stage, with the stage Ⅰ and stage Ⅱ cases accounted for 93.6% and 6.4%, respectively, but no stage Ⅲ cases were reported. The median (M) age and the 25th and 75th percentiles (P₂₅, P₇₅) at diagnosis was 43.0 (39.0, 47.0) years and the dust exposure years M (P₂₅, P₇₅) was 11.2 (8.1, 14.7) years. The M of age at diagnosis of new OWP cases in 2015-2018 and 2019-2022 were higher than those in 2006-2010 and 2011-2014, respectively (all P<0.05). The M of dust exposure duration of new OWP cases from 2006-2010 and 2019-2022 was higher than that in cases from 2015-2018 and 2011-2014, respectively (all P<0.05). Most of the small shadows of the cases were circular small p shadows and distributed in the bilateral middle and lower lung zones, with a density mostly of 1/1, according to the X-ray chest films. Conclusion The hazard of welding fumes in the shipbuilding industry in Guangzhou City has been controlled, but the prevention and control of OWP among welders remains severe.

Objective To explore the effect of lean management on cost control of single disease in patients with acute cerebral infarction (ACI) in stroke center. Methods A retrospective study was conducted. The patients with ACI who underwent intravenous thrombolysis in the stroke center of Taizhou Central Hospital in Zhejiang Province were enrolled. Thirty patients adopted traditional management procedures from July 2016 to September 2017 were enrolled in the control group, and 32 patients received lean management from October 2017 to December 2018 were enrolled in the lean group. The patients in the control group were treated with traditional intravenous thrombolysis, and the patients were sent to the neurology ward for intravenous thrombolysis. The patients in the lean group applied lean management value stream to optimize process management, the lean management team of the stroke center was established, and the green channel for stroke treatment was established to eliminate the waiting time as far as possible. The location of thrombolysis was changed from neurology ward to the neurological intensive care unit (NICU) in emergency department. The patients in the two groups were compared in terms of intravenous thrombolytic door-to-needle time (DNT), admission time to the neurologist's visit time (T1), CT examination time to neurology ward or NICU admission time (T2), neurology ward/NICU visit time to medication time (T3), and the proportion of patients with DNT controlled within 40 minutes, recovery of neurological impairment 7 days after thrombolysis [national institutes of health stroke scale (NIHSS) score], activity of daily living assessment (Barthel index), length of hospital stay, cost of hospital stay and patient satisfaction. At the same time, the main process quality and the implementation rate of easily missed indexes of cerebral infarction single disease were recorded. Results Compared with the control group, DNT, T1 and T2 in the lean group were significantly shortened [DNT (minutes): 39.56±11.12 vs. 63.03±19.63, T1 (minutes): 16.23±6.79 vs. 33.48±12.63, T2 (minutes): 13.45±3.84 vs. 17.47±5.56, all P < 0.01], T3 was slightly shortened (minutes: 9.88±1.95 vs. 10.95±2.69, P > 0.05), and the proportion of DNT control within 40 minutes was significantly increased [75.0% (24/32) vs. 16.7% (5/30), P < 0.01], the 7-day NIHSS score was decreased significantly (8.66±4.12 vs. 13.00±5.63, P < 0.01), 7-day Barthel index was increased significantly (71.6±16.7 vs. 54.7±17.1, P < 0.01), the length of hospital stay was significantly shortened (days: 9.69±4.06 vs. 12.47±3.83, P < 0.01), the hospital costs were significantly reduced (Yuan: 16 338±5 481 vs. 19 470±5 495, P < 0.05), the satisfaction of patients was improved significantly [(91.38±2.69)% vs. (86.53±2.78)%, P < 0.01]. In terms of the implementation rate of quality indicators such as pre-application evaluation of thrombolytic drugs, evaluation of dysphagia, and evaluation of vascular function, health education of ACI, rehabilitation evaluation and implementation within 24 hours, etc., the lean group was significantly improved as compared with the control group [(87.5% (28/32) vs. 53.3% (16/30), 96.9% (31/32) vs. 73.3% (22/30), 78.1% (25/32) vs. 43.3% (13/30), 100.0% (32/32) vs. 76.7% (23/30), 75.0% (24/32) vs. 33.3% (10/30), all P < 0.05]. Conclusion Lean thinking can realize the standardization of stroke center process, effectively utilize medical resources, improve medical quality and reduce the cost of cerebral infarction single disease.

Objective To explore the effect of omni-directional health education on self-management level and blood glucose control in patients with type 2 diabetes mellitus. Methods A total of 100 diabetic patients admitted to the department of neurology of Taizhou Central Hospital from January to December 2016 were randomly divided into an observation group and a control group, 50 cases in each group. All patients were given conventional medication according to their systemic conditions, the control group used conventional nursing care, while the observation group was supplemented with omni-directional health education (including diet control therapy, exercise therapy, blood glucose control, hypoglycemic drug use and observation, foot care, blood glucose self monitoring) on the basis of routine nursing;the course of treatment was 2 weeks in the two groups. The differences in self-management level and the effect of blood glucose control were compared between the two groups. Results On the return visits, the self-management scores were significantly higher in both groups than those before education (the control group was 35.2±9.2 vs. 30.1±5.2, the observation group was 78.6±11.5 vs. 29.8±5.4, all P < 0.05), fasting blood glucose [FBG (mmol/L): the control group was 8.8±2.5 vs. 14.8±2.9, the observation group was 6.1±1.6 vs. 15.1±2.7, both P < 0.05) and 2 hours postprandial blood glucose [2 h PBG (mmol/L): the control group was 12.5±3.4 vs. 22.5±3.8, the observation group was 9.1±2.2 vs. 21.9±3.6) were obviously lower than those before education (all P < 0.05), the degrees of improvement of the observation group were more significant than those of the control group [self management score: 78.6±11.5 vs. 35.2±9.2, FBG (mmol/L): 6.1±1.6 vs. 8.8±2.5, 2 hours PBG (mmol/L): 9.1±2.2 vs. 12.5±3.4, all P < 0.05]. Conclusion Omni-directional health education can improve the self-management level of diabetic patients, and the patient's blood glucose control is relatively better.

Objective:To discuss the effect of low-dose ionizing radiation on the health of radiation workers, and provide a basis for occupational health risk assessment of radiation workers.Methods:In January 2020, 3165 radiation workers who performed radiation occupational health examinations in Guangzhou Prevention and Treatment Hospital for Occupational Disease from January 2017 to December 2019 were selected as the research objects, and compared and analyzed the health status of radiation workers with different examination types (pre-job, in-job and off-job) , types of work, gender, and length of service.Results:The off-job occupational radiological health examination was rare at 2.3% (74/3165) . The abnormal detection rate of chest radiographs, renal function, thyroid function, and blood routine of the radiation workers in-job group was higher than that of the pre-job group ( P<0.05) . No statistical difference was found in the abnormal detection rate of the examination items during the in-job group and the off-job group ( P>0.05) . The blood routine abnormality detection rate of medical application group and industrial application group were higher than those of nuclear fuel group ( P<0.05) . The abnormal detection rate of blood pressure and renal function of male radiation workers was higher than that of females, while the abnormal detection rate of blood routine of females was higher than that of males ( P<0.05) . The abnormal detection rate of electrocardiogram, chest radiograph, blood pressure, renal function, thyroid function, and blood routine of radiation workers increased with increasing working age ( P<0.05) . Conclusion:Occupational health status of radiation workers is not optimistic. Radiation occupational health monitoring should be strengthened, special attention should be paid to off-job radiation occupational health examination, focusing on the sensitive indicators of sensitive personnel, improving radiation protection conditions, and effectively protecting the occupational health of radiation workers.

Objective:To discuss the effect of low-dose ionizing radiation on the health of radiation workers, and provide a basis for occupational health risk assessment of radiation workers.Methods:In January 2020, 3165 radiation workers who performed radiation occupational health examinations in Guangzhou Prevention and Treatment Hospital for Occupational Disease from January 2017 to December 2019 were selected as the research objects, and compared and analyzed the health status of radiation workers with different examination types (pre-job, in-job and off-job) , types of work, gender, and length of service.Results:The off-job occupational radiological health examination was rare at 2.3% (74/3165) . The abnormal detection rate of chest radiographs, renal function, thyroid function, and blood routine of the radiation workers in-job group was higher than that of the pre-job group ( P<0.05) . No statistical difference was found in the abnormal detection rate of the examination items during the in-job group and the off-job group ( P>0.05) . The blood routine abnormality detection rate of medical application group and industrial application group were higher than those of nuclear fuel group ( P<0.05) . The abnormal detection rate of blood pressure and renal function of male radiation workers was higher than that of females, while the abnormal detection rate of blood routine of females was higher than that of males ( P<0.05) . The abnormal detection rate of electrocardiogram, chest radiograph, blood pressure, renal function, thyroid function, and blood routine of radiation workers increased with increasing working age ( P<0.05) . Conclusion:Occupational health status of radiation workers is not optimistic. Radiation occupational health monitoring should be strengthened, special attention should be paid to off-job radiation occupational health examination, focusing on the sensitive indicators of sensitive personnel, improving radiation protection conditions, and effectively protecting the occupational health of radiation workers.