Objective:To construct hfgl 2 expression vector(pcDNA3.1-hfgl 2) and characterize the expression of hfgl 2 in CHO cells after transfection. Methods: Total RNA was extracted from chinese human peripheral blood monocyte cells,cDNA was obtained by reverse transcription,hfgl 2 cDNA was amplified and cloned into pcDNA3.1 and the orientation and the sequence were ensured by restriction endonucleases and sequencing assays.The recombinated plasmid was transfected into CHO cells,and the expression of hfgl 2 was detected by immunohistochemistry. Results:A 1.3 kb long target fragment was obtained and cloned into pcDNA3.1.The orientation and sequence are correct.hfgl 2 was only expressed in those cells transfected with pcDNA3.1-hfgl 2. Conclusion:hfgl 2 expression vector(pcDNA3.1-hfgl 2) has been successfully constructed.

Objective:To observe the efficacy of microcapsules to prolong islet xenografts survival in mice.Methods:Human fetal pancreatic islets were isolated from the embryo which was obtained from legal abortion(gestational age 16～24 weeks) with collagenase and enclosed in semipermeable alginate BaCl 2 capsules.Diabetic BALB/ C mice induced with streptozotocin were divided into 3 groups.Each group had 7 mice.Then transplantation was performed.Results:Transplantation of 1000?100 encapsulated fetal islets into the peritoneal cavities of 7 BALB/ C mice restord normalglycemia for 78.4?21.27 days without immunosuppression.The second group of 7 diabetic mice received an equal number of uncultured pancreatic fragments.These unprotected xenografts were functional for only 7.43?3.42 days,but high mortality occured.There was significant differences between the two groups(P

[Abstract ] Objective The role of serum Pygo2 expression in children with non-alcoholic fatty liver disease(NAFLD) in the disease process and whether it can be used to evaluate the degree of liver fibrosis still remain unknown .The article aimed to detect Pygo 2 expression in the peripheral blood of children with NAFLD and ana-lyze its relationship with traditional serum hepatic fibrosis index in or-der to evaluate the clinical significance of Pygo 2 measurement in chil-dren with NAFLD . Methods We enrolled 120 cases of childhood obesity and 18 healthy controls in Anhui Provincial Hospital and the First Affiliated Hospital of Nanjing Medical University from September 2014 to February 2016.The cases of childhood obesity were di-vided into simple obesity group ( n=44, no diffuse fatty liver under liver ultrasound detection ) , NAFL group ( n=35, diffuse fatty liver with normal liver function under liver ultrasound detection ) and NASH group ( n=41, diffuse fatty liver with abnormal liver function under liver ultrasound detection ) .The peripheral serum was collected from all patients and healthy controls .ELISA was used to detect serum Pygo2 expression and radioimmunoassay was used to detect the serum hyaluronia acid (HA), procollagen type Ⅲ(PCⅢ), pro-collagen type Ⅳ(CⅣ) and laminin(LN) levels.Finally the serum ALT and γ-GT levels were measured with totally automatic enzymat-ic method. Results Pygo2 expression in NAFL group [52.1(12.3)μg/L] and NASH group[78.3(50.0)μg/L] increased signifi-cantly compared with simple obesity group [43.2(18.7)μg/L](P<0.05).Pygo2 expression in NASH group increased significantly compared with control group [41.7(16.8)μg/L] and NAFL group (P<0.001).The serum hepatic fribrosis and inflammation markers ( HA, PC, ALT, C III and IV gamma-GT) levels gradually increased in the obese children .There were statistically positive correla-tions between serum Pygo2 and HA, PCⅢ, CⅣ, ALT or γ-GT (P<0.001).In particular, more significant positive correlations were found between serum Pygo2 and HA, CⅣor γ-GT (r=0.708, P<0.001;r=0.589, P<0.001;r=0.674, P<0.05). Conclusion The degree of liver fibrosis worsens with the increase of Pygo 2 expression and Pygo 2 is in remarkable correlation with conventional he-patic fibrosis serum makers ( HA, C IV) orγ-GT, which shows Pygo 2 expression can be taken as the clinical evaluation index of liver fibrosis in children with NAFLD .

Objective To observe the antimutagenic action of sodium selenite and vitamin E on condensates of cooking oil fumes(COF) Methods SCE (sister chromatid exchanges) were observed and contrasted before and after addition of sodium selenite or vitamin E at a certain dose to the culture of human peripheral blood lymphocytes treated by COF Results Sodium selenite added to lymphocytic culture treated by COF at 37 ℃ for 4 hour incubation significantly lowered the frequencies SCEs of lymphocytes and very significant synergistic effects on lowering frequencies of SCEs were observed during adding both sodium selenite(terminal concentration 0 9?10 -7 mol/L) and vitamin E(torminal concentration 0 1% (v/v) to lymphocytic culture treated ty COF for 4 hour incubation Conclusion Combined sodium selenite and vitamin E at certain concentrations in cultured lymphocytes for 4 hour incubation showed very significant synergistic effects on lowering the mutagenicity of lymphocytes induced ty COF.Sodium selenite alone was also shown to be effective in lowering the frequencies of SCEs of human peripheral blood lymphocytes

Objective To investigate the interventional effect of multidimensional strategy to reduce the incidence of neonatal ventilator-associated pneumonia.Methods The patients who were admitted to the NICU department and received mechanical ventilation (MV) for more than 48 hours from October 2012 to September 2014 were recruited. The control group received the experienced interventions from October 2012 to September 2013, neonates from October 2013 to September 2014 were recruited as the intervention group receiving multidimensional controlling strategy, including bundle care, education, pro-cess and outcome surveillance and feedback on the practices. The compliance of before-after implementation of interventions were quantitatively evaluated,and the rate of VAP was compared between the two groups.Results The compliance rate of hand hygiene and the qualiifed rate of sputum suction, oral care, drain condensation from ventilator circuit, semi-recumbent posi-tion, and preventing of stress-ulcers were increased 17.0%, 11.4%, 14.7%, 18.2%, 37.5% and 56.3% respectively after implemen-tation of multidimensional strategy, and had statistical difference (χ2=36.47-294.36,P<0.01). But the qualiifed rate of antibiotic use only was 66.1% in the post-VAP bundle phases, and showed no statistical difference before and after(P>0.05). The VAP rate was 41.7 cases per 1000 MV-days during control group and 19.7 cases per 1000 MV-days during intervention group, had statis-tical signiifcance (P<0.05). But the rate of ventilator application showed no statistical difference between two group (P>0.05). ConclusionThe multidimensional strategy can effectively prevent the incidence of VAP.

Objective To investigate the causes of spinal tuberculosis retreatment and its surgical treatment strategy.Methods Between May 2010 and May 2014,96 patients with spinal tuberculosis who had been operated before were retreated.The dates of them were reviewed.There were 51 males and 45 females with mean age of 39.7 years.Deciding upon the revision surgical procedure should be determined by last operation approach,the direction of compression of spinal cord,the position of sinus and extent of foci.The retreated patients were compared with 481 unretreated patients in the following index including sex,age,duration of disease,focus range,nutrition,drug resistant tuberculosis,debridement,stability of instrumentation,postoperative regular chemotherapy,associated tuberculosis.Results The surgery duration time was 160-280 min,average 210 min,and the blood loss was 400-1500 ml,average 600 ml.The VAS score before the operation was 6-9 (average 7.5) and 1-3 (average 1.5) at the last follow-up,the difference was statistically significant.Neurological deficits in 21 patients clinically improved at least one grade according to the ASIA grading system at last follow-up.Kyphosis and scoliosis degrees were corrected significantly postoperatively and the correction was 9.5°±3.6° at the final follow-up.The average angle loss was 3.5°±1.1°.There was significant difference between the kyphosis angles preoperatively,postoperatively and final follow-up.Kirkaldy-Willis function score showed that the total fine rate was 88％.There were 35 patients whose tuberculosis bacterial culture and drug sensitive experiments suggested drug resistance.Wound healing delayed in 7 patients.24 cases had sinus formation,13 cases in which were healed after wound dressing,and 11 cases undertook operation again.Conclusion The causes of spinal tuberculosis retreatment include uncompleted debridement,drug resistant strains of tuberculosis,irregular postoperative anti-tubercular treatment,poor preoperative nutritional status and failure of spinal stability reconstruction.The key of successful revision surgery includes radical debridement,strut grafting with autologous iliac bone block,proper reconstruction of spinal stability,individualized chemotherapy according to the drug-resistance,and the appropriate use of irrigation and drainage postoperatively.

Objective: To examine the impact of heat waves and cold spells on the incidence of hemorrhagic stroke, so as to provide insights into prevention of hemorrhagic stroke. Methods: Data pertaining to the incidence of hemorrhagic stroke in Zibo City from 2015 to 2019 were collected from Shandong Provincial Management Information System for Chronic Diseases and Cause of Death Surveillance, and the meteorological data during the period from 2015 to 2019 were captured from National Meteorological Information Center of China. The air quality index (AQI) was collected from the National Daily Report of Urban Air Quality in China. Heat wave was defined as the highest daily temperature that was no less than the 90th percentile (P90), P92.5, P95 and P97.5 of the highest daily temperature in the warm season for at least 2, 3 or 4 days, and cold spell was defined as the lowest daily temperature that was no more than the P10, P7.5, P5 and P2.5 of the lowest daily temperature in the cold season for at least 2, 3 or 4 days. The effect of heat waves and cold spells on the incidence of hemorrhagic stroke was evaluated using a generalized additive model and described with relative risk (RR) and its 95%CI. Results: A total of 8 844 case with first-onset hemorrhagic stroke were recorded in Zibo City from 2015 to 2019. The lowest daily temperature that was no more than P10, P7.5 or P5 of the lowest daily temperature in the cold season for at least two days, or that was no more than P10 or P7.5 of the lowest daily temperature for at least 3 days resulted a remarkably increased risk of hemorrhagic stroke (lowest RR=1.187, 95%CI: 1.031-1.366; highest RR=1.242, 95%CI: 1.042-1.480), and after adjusting the effect of daily mean temperature, the lowest daily temperature that was no more than P10 or P7.5 of the lowest daily temperature in the cold season for at least two days, or that was no more than P10 of the lowest daily temperature for at least 3 days resulted a remarkably increased risk of hemorrhagic stroke (lowest RR=1.236, 95%CI: 1.009-1.513; highest RR=1.274, 95%CI: 1.023-1.585). However, there was no significant association between heat waves and the risk of hemorrhagic stroke. Conclusion Cold spells may increase the risk of hemorrhagic stroke, while no significant association is examined between heat waves and the risk of hemorrhagic stroke.

Objective:By exploring the source of children's total fluoride intake and the relationship between children's total fluoride intake and dental fluorosis prevalence, to calculate the benchmark dose (BMD) of children's total fluoride intake and its 95% confidence lower limit (BMDL), and to provide the basis for revision of "Total Fluoride Intake for Inhabitants" (WS/T 87-2016).Methods:The villages that had water improvement for 5 years and more in 6 provinces of Jiangsu, Shandong, Hebei, Anhui, Henan and Shaanxi were selected as survey sites in April 2014. The water fluoride content of these villages was 0.3 - 3.0 mg/L, tap water samples from the centralized water supply were collected, and fluoride content was detected by ion selective electrode method. Children aged 8 to 12 years were selected, children's dental fluorosis was checked by Dean's method. Children's dietary and drinking water volume were surveyed by duplicate portion study (measurement for 3 d), and dietary fluoride content was detected according to the "Method for Determination of Fluorine in Foods". The mean and standard deviation of drinking water fluoride intake, dietary fluoride intake, and total fluoride intake were measured. According to the dose-response relationship between children's total fluoride intake and the detection rate of dental fluorosis, BMD and BMDL were calculated, and the reference dose (RfD) was calculated based on BMDL.Results:The mean of water fluoride of all 29 villages was 1.26 mg/L (from 0.41 to 2.85 mg/L). Totally 3 043 children aged 8 to 12 years were checked, and the detection rate of dental fluorosis was 30.2% (919/3 034). The lowest detection rate of dental fluorosis was 2.0% (2/100) and the highest was 71.4% (30/42) in the 29 villages. The children's dietary and drinking water volume of 769 person-time aged 8 to 12 years were surveyed, the children's daily drinking water fluoride intake, dietary fluoride intake, and total fluoride intake were (0.83 ± 0.66), (1.13 ± 0.61) and (1.96 ± 0.89) mg/d, respectively. The BMD of children's daily total fluoride intake was 2.43 mg, the BMDL was 2.21 mg, and the RfD was 2.21 mg.Conclusion:The BMD of 8 to 12 years old children's daily total fluoride intake is the same as the allowable limit (2.4 mg) of the national standard "Total Fluoride Intake for Inhabitants" (WS/T 87-2016).

Objective: To investigate the impact of temperature changes between neighboring days (TCN) on the mortality risk of respiratory diseases, so as to provide the evidence for the study of deaths from respiratory diseases caused by climate change. Methods: The monitoring data of deaths from respiratory diseases in Zibo City from 2015 to 2019 were collected from Shandong Provincial Management Information System for Chronic Diseases and Cause of Death Surveillance. The meteorological and air pollutant data of the same period were collected from China Meteorological Data Website and ChinaHighAirPollutants dataset. The effect of TCN on the risk of deaths from respiratory diseases was examined using a generalized additive model combined with a distributed lag non-linear model, and subgroup analyses for gender and age were conducted. The disease burden attributed to TCN at different intervals was assessed by calculating attributable fraction. Results: Totally 11 767 deaths from respiratory diseases were reported in Zibo City from 2015 to 2019, including 6 648 males (56.50%) and 5 119 females (43.50%). There were 1 307 deaths aged <65 years (11.11%), and 10 460 deaths aged 65 years and older (88.89%). A monotonically increasing exposure-response relationship was observed between TCN and deaths from respiratory diseases in the general population, females, and the population aged 65 years and older. The 95th percentile of TCN (P95, 3.84 ℃) reached the peak at a cumulative lagged of day 11 (RR=2.063, 95%CI: 1.261-3.376). The results of subgroup analyses showed greater impacts on females and the population aged 65 years and older, with cumulative lagged effects peaking at day 12 (RR=3.119, 95%CI: 1.476-6.589) and day 11 (RR=2.107, 95%CI: 1.260-3.523). The results of attributional risk analysis showed that next-day warming might increase the attributable risk of deaths from respiratory diseases, and next-day cooling might decrease the attributable risk. Conclusion Next-day warming may increase the mortality risk of respiratory diseases, and has greater impacts on females and the population aged 65 years and older.

BACKGROUND/AIMS: The Wnt/beta-catenin signaling pathway has been reported to play an important role in liver fibrosis. This study was designed to investigate whether mesoderm-specific transcript homologue (Mest), a strong negative regulator of Wnt/beta-catenin signaling, could inhibit liver fibrosis. METHODS: pcDNA-Mest was transfected into hepatic stellate cells (HSCs) and rats. Rats were randomly divided into four groups: normal group (normal saline), treatment group (pcDNA-Mest+CCl4), control group (pcDNA-neo+CCl4), and model group (normal saline+CCl4). Changes in liver pathology were evaluated by hematoxylin and eosin and Masson's trichrome staining. The levels of alanine transaminase, aspartate transaminase, lactic dehygrogenase, hyaluronic acid, and laminin in the serum and hydroxyproline in the liver were detected by biochemical examination and radioimmunoassay, respectively. The expression and distribution of beta-catenin, alpha-smooth muscle actin (alpha-SMA), Smad3, and tissue inhibitor of metalloproteinase type I were determined, and the viability of the HSCs was tested. RESULTS: Our data demonstrate that Mest alleviated CCl4-induced collagen deposition in liver tissue and improved the condition of the liver in rats. Mest also significantly reduced the expression and distribution of beta-catenin, alpha-SMA and Smad3 both in vivo and in vitro, in addition to the viability of HSCs in vitro. CONCLUSIONS: We found that Mest attenuates liver fibrosis by repressing beta-catenin expression, which provides a new therapeutic approach for treating liver fibrosis.
Animals ; Carbon Tetrachloride/toxicity ; Cells, Cultured ; Hepatic Stellate Cells/physiology ; Liver Cirrhosis, Experimental/*physiopathology ; Male ; Proteins/*physiology ; Random Allocation ; Rats, Wistar ; Transfection ; Wnt Signaling Pathway/*physiology ; beta Catenin/metabolism