Air ; analysis ; Chromatography, Gas ; methods ; Ketones ; analysis ; Workplace

Objective To investigate whether curcumin could inhibit the metastasis of pancreatic cancer in vitro and in vivo and its mechanism.Methods Pancreatic cancer AsPC-1 cells were treated with different concentrations of curcumin.After 72 hours,cell survival rate were detected by MTT and the appropriate concentration of curcumin was selected.After treated with 6 μmol/L curcumin,early apoptosis of AsPC-1 cells were detected by Annexin V-FITC/PI double staining flow cytometry,and the effects of curcumin on the migration and invasion of AsPC-1 cells were observed.After establishment of the orthotopic nude mouse model of pancreatic cancer,the mice were orally treated with low dose (20 mg/kg body weight) and high dose (40 mg/kg body weight) of curcumin respectively.Eight weeks later mice were sacrificed to observe the tumor metastasis,immunohistochemical methods were used to detect the positive expressions of CD34,NF-κB and MMP-9 in the tumor tissue.Results Curcumin of different concentrations could inhibit the proliferation of AsPC-1 cells and induce its apoptosis in a dose dependent manner,and 6.μmol/L was the best dose of curcumin.After 6 μmol/L curcumin treatment,the migration coverage of AsPC-1 decreased from 70％ to 10％,the number of penetrating cells decreased from 136/200x magnification to 17/200x magnification,and the difference between the two groups was statistically significant (P ＜0.05).In the nude mouse model of pancreatic cancer,the size of the tumor decreased from (97.8 ± 15.3) mm3 to (44.3 ± 9.7) mm3 in high dose group and (28.1 ±7.1)mm3 in low dose group,the number of distant metastasis decreased from 108.3 ±6.7 to 29.5 ±4.5 and 8.9 ± 2.4,the expression of CD34 decreased from 20.5 ± 2.3 to 10.3 ± 1.2 and 7.9 ± 3.2,and the expression of MMP-9 decreased from 85.2 ± 2.3 to 53.2 ± 1.2 and 34.2 ± 3.1,and the difference was statistically significant (P ＜ 0.05).Conclusions Curcumin can inhibit the metastasis of pancreatic cancer both in vitro and in vivo,and its effect may be related to the inhibition of expressions of CD34 and MMP-9.

Objectives To evaluate the effect of N-Acetylcysteine on the airway inflammation and remodeling of obese asthma mice with high-fat diets. Methods Forty female C57BL/6J mice were randomly divided into 4 groups, asthma group (A), obese asthma group (B), treatment group (C) and normal control group (D). Group A were sensitized and challenged by ovalbum (OVA) and normal diets. Group B were sensitized and challenged as group A but fed with high-fat diets, while group C were sensitized, challenged and fed as group B, but administrated N-Acetylcysteine 200 mg/kg. d from the third week after challenge. The cells in BALF were counted and classified after staining, IL-6 and 8-iso-PGF2α(8-iso-PGF2α) in lung tissues were detected by ELISA. WAt, WAm, Pbm, as the remodeling indices, measured in lung pathological section. All parameters were compared among 4 groups. Results In comparison with group D, the leukocytes and EOS in BALF, WAt/Pbm, WAm/Pbm in lung section were increased as well as IL-6 and 8-iso-PGF2α in lung tissue elevated in group A and group B, while the maximum changes were observed in group B (P ＜0. 05). After NAC treatment, the IL-6, 8-iso-PGF2α and WAt/ Pbm were decreased significantly (P ＜0. 05). Pearson correlation analysis showed that WAt/Pbm and IL-6 were in positive correlation with 8-iso-PGF2α (r =0. 817, 0. 737, P ＜0. 01). Conclusions N-Acetylcysteine can alleviate the airway inflammation and remodel reaction of asthma by a substantial inhibition of the oxidative stress reaction in lung.

Objective To summarize the value of early mechanical ventilation plus continuous vacuum suction in treatment of serious pulmonary contusion.Methods Forty-eight cases of severe pulmonary contusion were assigned to mechanical ventilation plus continuous vacuum suction (observation group,n =20) and mechanical ventilation plus discontinuous vacuum suction (control group,n =28)according to the random number table.Modes of mechanical ventilation were synchronized intermittent mandatory ventilation (SIMV),pressure support ventilation (PSV),and positive and expiratory pressure (PEEP).Changes in blood gas analysis,mechanical ventilation time,and associated complications were compared between groups.Results At ventilation time of 6 and 24 hours,PaO2 in observation group was (100.36 ± 5.90) mmHg and (105.34 ± 7.40) mmHg respectively,with significant differences from (75.36 ± 8.95) mmHg and (76.36 ± 8.35) mmHg in control group (P ＜ 0.01).At ventilation time of 24 hours,PaO2/FiO2 was (283.50 ± 15.20) mmHg in observation group and (201.50 ± 10.20) mmHg in control group (P ＜0.01).Mechanical ventilation time and PEEP at ventilation time of 48 hours in observation group was (3.2 ± 1.1) days and (4.5 ± 2.3) cmH2 O,with significant differences from (6.5 ± 2.8) days and (8.5 ± 2.5) cmH2O in control group (P ＜ 0.01).Associated complications of the two groups revealed no significant difference (P ＞ 0.05).Conclusion Early mechanical ventilation with sustained vacuum suction is effective to keep airway clear,improve oxygenation index,decrease PEEP level,and control the duration of mechanical ventilation,but may not lower the risks of ventilator-associated pneumonia and pulmonary atelectasis.

Objective To investigate the feasibility of the lower cervical spine (C3 -C7 ) laminar screw technique for fixing adult posterior cervical spine .Methods We chose 9 formalin fixed moist adult cervical specimens ,which consist of male 6 and female 3 of the age 38 to 63 years old .The average age is 51 .9 years old and the average height is 165 .6 cm .Then we measured the thickness and heightof C3 -C7 lamina ,the lamina length of L1 ,L2 ,and the lamina of axis and the sagittal plane angle .Results The thickness and height of C3 -C7 lamina ,and the lamina length of L1 and L2 of adult male is bigger than adult women .There was statistical sig-nificance between the thickness ,height ,lamina length difference of different genders lamina (P<0 .05) ,but no significant difference between the left and the right (P> 0 .05) .The average lamina thickness of C2 ,C3 ,C4 ,C5 ,C6 ,C7 were respectively 4 .70 ,3 .87 , 3 .30 ,3 .84 and 5 .16 mm .The lamina thickness which was more than 4 .00 mm accounted for 54 .4% .The lamina thickness of C3 , C4 ,C6 ,C7 which was more than 4 .00 mm accounted respectively for 77 .8% ,61 .1% ,33 .3% ,and 88 .9% .Conclusion Crossing laminar screws in cervical spine is feasible in anatomy .The operation can make under direct vision ,and can accurately estimate the screw path length and entry angle .Patients with anatomic abnormalities can be used as an alternative fixation technique or as fixed in the fixed mode fails .So the results can provide a reference for clinical application .

BACKGROUND:Electrospun polylactic acid/polycaprolactone nanofibers (ENF) are a kind of self-synthesized biodegradable material. Our preliminary studies have indicated that the biomaterial exhibits excel ent biocompatibility;however, the research about its mechanics is stil little. OBJECTIVE:To explore the effects of static pressure on the cytocompatibility of adipose-derived stem cel s on the ENF scaffold. METHODS:Adipose-derived stem cel s were seeded onto the ENF scaffold, and then cultured in the low-glucose DMEM supplemented with 10%fetal bovine serum. The mixed constructs were submitted to the static pressure at 0, 15, 30, and 45 kPa for 4 hours using a static pressure device, respectively. Subsequently, the proliferation, adhesion and viability of adipose-derived stem cel s on the ENF scaffold were detected using MTT assay and living/dead staining to evaluate the cytocompatibility. RESULTS AND CONCLUSION:MTT assay showed that there were significant differences in absorbance values among groups by one-way analysis of variance after 4 hours of loading with different static pressures in vitro. Under 0-30 kPa static pressure, the absorbance values increased with static pressure, but the absorbance values declined until the pressure reached 45 kPa, and multiple comparisons between groups showed significant difference. The significant differences in the cel attachment percentage by MTT assay could be found among groups. The living/dead staining results supported the above findings. Furthermore, the significant differences in percentage of living cel s among groups were shown using either one-way analysis of variance or paired t test. In conclusion, the appropriate static pressure can promote the cytocompatibility, proliferation, adhesion and viability of adipose-derived stem cel s on the ENF scaffold. But the excessive pressure is likely to inhibit the cel ular biological behaviors, thus affecting cytocompatibility of adipose-derived stem cel s with the ENF scaffold.

Objective To assess the correlation between the pregnancy‐associated plasma protein A (PAPP‐A)level with gesta‐tional diabetes mellitus(GDM )in primiparous women .Methods The nonparametric test and Logistic regression analysis were used to retrospectively analyze 168 pregnant women of GDM and 273 normal pregnant women ,including age ,body weight ,PAPP‐A ,freeβ‐human chorionic gonadotropin(fβ‐hCG) .Results The age had significant difference between GDM group and control group(P<0 .01) ,the PAPP‐A concentration and corrected multiple of the median (MoM )of PAPP‐A in the GDM group were significantly lower than those in the control group(P<0 .01) .Conclusion Low level of PAPP‐A during early pregnant stage in primiparas is strongly associated with GDM and can be used as the risk factor of GDM .

Through the suvey, we find that freshmen are generally suited for college physics studies. ln this paper, high school and college students’ interest in Learnig, their initiatives, the change of their study methods and the teachers’ teaching methods are discussed.

In the reform of human resource system at public institutions,public hospitals are challenged with changing employment mechanism and effective mobilization of all-staff's incentives.This paper introduced the classified staff management by Sir Run Run Shaw Hospital,College of Medicine,Zhejiang University,which covered the background,specific methods,purposes,initial results,as well as the key links and problems encountered.The study proved that classified management of the hospital staff helps create a fair and impartial workplace,conducive for sustainable development of the hospital.

ObjectiveTo evaluate the efficacy and safety of combination therapy of tamsulosin and solifenacin for benign prostatic hyperplasia ( BPH ) with overactive bladder ( OAB ).Methods82 patients with OAB and coexisting BPH were randomly divided into tamsulosin group ( n = 38 ) and combination group ( n = 44). The ages were from 50 to 75 y ( averaged, 56.8 ± 8.6). Inclusion criteria: the mean frequency of micturition ≥8 times per day, the frequency of nocturia ≥2 times per day, voiding volume ＜200 ml each time; for the overactive bladder symptom score ( OA BSS), the 3 rd score ＞ 2, total score ＞ 3. The tamsulosin group accepted tamsulosin 0.2 mg once daily, the combination group accepted tansulouxin 0.2 mg and solifenacin 0.2 mg once daily. Both groups were maintained the corresponding therapy for 12 weeks.The international prostate symptom score (IPSS), Qmax, residual urine volume, OAB score and adverse reactions were recorded.ResultsThe values of IPSS ( 19.5 ±2.2 vs 15.6 ±2.4, P =0.027), the voiding symptom score ( 15.6 ± 2.4 vs 3.4 ± 1. 7, P = 0. 022) and Qmax ( 13.7 ± 3.8 vs 16.6 ± 4.1, P = 0. 034 )improved significantly after treatment in tamsulosin group ( P ＜ 0. 05 ). The values of IPSS ( 19.7 ± 2.3 vs 9.7 ± 3.0, P ＜0. 001), the storage symptom score (13.8 ± 1.9 vs 5.6 ± 1.6, P ＜0. 001 ), OABSS (10.3 ±1.8 vs 5.3 ±1.3, P ＜0.001) and Qmax(14.1 ±4.1 vs 17.2 ±3.5, P=0.027) also improved significantly after treatment in combination group ( P ＜ 0. 05 ). The values of IPSS ( 9.7 ± 3.0 vs 15.6 ±2.4, P ＜ 0.001 ), the storage symptom score (5.6 ± 1.6 vs 12.0 ± 1.6, P ＜ 0.001 ) and OABSS ( 5.3 ±1.3 vs 9.7 ± 2.7, P ＜ 0. 001 ) improved significantly in combination group than those in tamsulosin group ( P ＜0.001 ). There were no difference between two groups in values of the voiding symptom score, Qmax and residual urine volume ( P ＞ 0.05 ). The incidences of adverse reactions in tamsulosin group and combination group were 7.9％ (3/38) and 20.5％ (9/44) without significant difference. There was no acute urinary retention in both groups.ConclusionsIt is effective and safe for patients with BPH and OAB to accept combination therapy of tamsulosin and solifenacin.