OBJECTIVETo develop a solvent desorption gas chromatographic method for determination of n-pentanol in the workplace air.

METHODSn-Pentanol in the workplace air was collected with activated carbon tubes, desorbed with 2% 2-propanol in carbon disulfide, separated with a nitroterephthalic acid-modified FFAP capillary column, and detected with flame ionization detector.

RESULTSThe limit of detection was 0.2 mg/L; the lower limit of quantification was 0.6 mg/L; the linear range was 0.6-4072.0 mg/L. The minimum detectable mass concentration was 0.2 mg/m3 for 1.5 L of air sample. This method was highly repeatable. The relative standard deviations were 2.3%-5.4%. The average desorption efficiencies were 86.9%-94.2%. The absorption efficiencies were 100%. The breakthrough volume was above 8.0 mg in 100-mg activated carbon. The samples in activated carbon tubes could be stored for at least 14 days at room temperature.

CONCLUSIONThe method is feasible for determination of n-pentanol in the workplace air.

2-Propanol ; Air Pollutants, Occupational ; analysis ; Carbon Disulfide ; Charcoal ; Chromatography, Gas ; Limit of Detection ; Pentanols ; analysis ; Solvents ; Workplace

Objective To explore the relationship between bronchial asthma severity and the levels of nerve growth factor(NGF) in induced sputum.Methods One hundred and seventy children with asthma were divided into two groups, including 87 cases of chronic duration group and 83 cases of acute phase group.Before treatment lung function test was conducted, induced sputum was taken immediaitely, the levels of NGF were measured by enzyme-linked immunosorbent assay and Eosinophils (EOS)in induced sputum were count.Comparative analysis was conducted.Results The levels of NGF,FEV1 ,FVC,PEF and EOS in duration group were significantly elevated compared with acute phase group (all P ＜ 0.05).Significant differences in NGF, FEV1, FVC, PEF and Eos were found by comparison of different extent in chronic duration group and acute phase group (all P ＜ 0.05), the levels of NGF were positive correlated with illness severity (all P ＜ 0.05) in children with afsthma in chronic duration and acute phase, the levels of NGF were positive correlation with FEV1, FVC, PE-Fand EOS (all P ＜ 0.05) in children with asthma in chronic duration, the levels of NGF were positive correlation with FEV1 and PEF in children with Asthma in acute phase,but the levels of NGF has no correlation with FVC and EOS (all P ＞ 0.05) in children with Asthma in acute phase.Conclusion The levels of NGF in induced sputum of children with asthma in acute phase are markedly elevated compared with children with asthma in chronic duration, the levels of NGF are positive correlated with illness severity in children with asthma in chronic duration and acute phase.

Objective To explore the relation ship between expression of survivin gene in leukemia cells and its clinical effects, and to study the mechanism of survivin resist-apoptosis function in leukemia.Methods Survivin expression was detected by Western blots analysis and expressions of Fas and Caspase were examined by immunohistochemistry in 18 leukemia patients.Results Thirteen cases in peripheral blood mononuclear cell survivin positive expression was detected in 18 leukemia patients(72.2%), but no survivin expression in 10 normal persons. There were significant difference of survivin expression in ALL/ANLL patients groups and different WBC groups(P

AIM:To investigate the renal function and pathological changes in Npc1 mutant ( Npc1-/-) mice. METHODS:Different genotypes of Niemann-Pick disease type C1 (Npc1) mice were identified by PCR.Subsequently, the renal function of Npc1-/-and Npc1 +/+mice at postnatal day 60 ( P60) was evaluated by measuring the activity and con-tent of important indicators in the serum including ALT , AST, LDH, urea, UA and Cr.Furthermore,β-galactosidase stai-ning and Masson staining were performed to examine the aging and fibrosis of the renal tissues , respectively .RESULTS:Compared with the Npc1 +/+mice, the body weight and kidney weight had a significant reduction ( P<0.01) in the Npc1-/-mice.The results of hepatic and renal functions showed that the activities of ALT , AST and LDH, and contents of urea, UA and Cr had marked increases (P<0.05) in the Npc1-/-mice.Moreover, the results of senescence-associatedβ-galacto-sidase staining in the renal tissues demonstrated accelerated aging in the Npc1-/-mice (P<0.01), and these results were confirmed by Masson staining, which clearly showed the formation of collagen fibers (P<0.01).CONCLUSION:Muta-tion of the Npc1 gene results in abnormal lipid metabolism , which accelerates kidney senescence by promoting fibrosis in the renal tissue and subsequently causes reduction in renal function .

This study aimed to investigate viral infections and the prevalence of influenza-like illness (ILI) in Shijiazhuang, China, in 2011 and to provide a scientific basis for the diagnosis and control of respiratory tract infections. Throat swab specimens were collected from 483 cases of ILI who were outpatients in the influenza surveillance sentinel hospitals in Shijiazhuang between January and December 2011. All specimens were examined by multiplex RT-PCR for the following 15 respiratory tract viruses: adenovirus (ADV), human rhinovirus (HRV), human parainfluenza virus (PIV types 1-4), influenza virus A (FluA), influenza virus B (FluB), human enterovirus (HEV), respiratory syncytial virus (RSV-A and -B), human metapneumovirus (HMPV), human coronavirus (HCoV-229E/NL63 and -OC43/HKU1), and human bocavirus (HBoV). Among the 483 cases of ILI, 214 (44.31%) were positive for viruses, including ADV (8.7%), HEV (8.7%), RSV-A (8.07%), HRV (7.45%), FluA (5.38%), HCoV-OC43/ HKU1 (2.9%), PIV-3 (2.9%), HMPV (1.86%), PIV-1 (1.24%), HCoV-229E/NL63 (1.04%), PIV-2 (1.04%), HBoV (0.83%), and FluB (0.41%). Twenty-six (5.38%) of all cases were co-infected with two or more viruses, most commonly HEV/HRV with other viruses. Cases of viral infection were detected throughout the year, with peaks in January and February. ADV and HRV were detected throughout almost the whole year without obvious seasonality. HEV was detected between April and November, with a peak of prevalence in summer and autumn. FluA and FluB reached epidemic levels mainly in winter and spring. All cases of RSV were identified to be subtype A. PIV infection was mainly caused by PIV-3. The positive rate of HCoV-OC43/HKU1 infection was significantly higher than that of HCoV-229E/NL63. The leading five viruses that resulted in ILI Shijiazhuang in 2011 were HEV, ADV, RSV-A, HRV, and FluA, and these viruses have different epidemiological features.
Adolescent ; Adult ; Aged ; Child ; Child, Preschool ; China ; epidemiology ; Female ; Humans ; Infant ; Influenza, Human ; epidemiology ; virology ; Male ; Middle Aged ; Respiratory Tract Infections ; epidemiology ; virology ; Virus Diseases ; epidemiology ; virology ; Viruses ; classification ; genetics ; isolation & purification ; Young Adult

Objective To compare the clinical efficacy and serum levels of IL-35 and NF-κB of rosuvastatin and atorvastatin in patients with coronary heart disease.Methods i00 patients with coronary heart disease were selected,they were divided into two groups according to different statins.The control group (49 cases) was given atorvastatin calcium tablets.The observation group (51 cases) was given rosuvastatin calcium tablets.The effect of different statins in treatment of coronary heart disease was evaluated by lipid levels,IL-35,NF-κB level before and after treatment,adverse reaction during treatment.Results Before treatment,The TG,TC,LDL-C,HDL-C levels of two groups had no significant difference.After treatment,the TG,TC,LDL-C levels of two groups were decreased,and the LDL-C level in the observation group was lower than that of the control group (P ＜ 0.05).The TG,TC level had no significant differences between two groups.After treatment,the HDL-C levels were increased in two groups.There were no significant differences between groups.Before treatment,there were no statistical significance on serum IL-35,NF-κB level.After treatment,the IL-35 level was increased and NF-κB was decreased in two groups (P ＜ 0.05).And the IL-35 level was higher than that of the control group,the NF-κB level was lower than that the control group (P ＜ 0.05).During treatment,there was no statistical significance on adverse reaction between two groups.Conclusion Rosuvastatin and Atorvastatin have good lipid-lowering effect on coronary heart disease.Rosuvastatin can reduce the LDL-C obviously.These drugs can control the inflammation reaction,with less adverse reaction.It is the ideal lipid-lowering drug in clinical treatment of coronary heart disease.

ObjectiveTo observe the effect of acetylcholine (ACh) on lipopolysaccharide (LPS) induced inflammatory model of rat alveolar macrophages, and to observe the effect of the acetylcholinesterase inhibitor physostigmine (Phy) on the anti-inflammatory effect of ACh.Methods The rat alveolar macrophages NR8383 were cultured in vitro, which were divided into five groups: blank control group, LPS group (stimulated with 1 mg/L LPS for 12 hours), LPS+ ACh group (0.01, 0.1, 1, 10, 100μmol/L of ACh were added for 5 minutes before LPS stimulation), LPS+ Phy group (1 mmol/L Phy was added for 5 minutes before LPS stimulation), and LPS+ ACh+ Phy group (1 mmol/L Phy and 10μmol/L ACh were added for 5 minutes before LPS stimulation). The supernatants were collected in each group, the enzyme-linked immunosorbent assay (ELISA) was used to assay the contents of tumor necrosis factor-α (TNF-α), interleukins (IL-1β, and IL-6). The activity of acetylcholine esterase (AChE ) in the supernatant was also determined.Results① The contents of TNF-α (ng/L: 605.09±57.13 vs. 34.07±8.62), IL-1β (ng/L: 377.09±28.55 vs. 32.33±10.62) and IL-6 (ng/L: 558.04±77.45 vs. 42.62±11.21) in the LPS group were significantly higher than those in the blank control group (allP< 0.05). These results indicated that the inflammatory model of rat alveolar macrophages was constructed successfully.② ACh with the final concentrations of 0.01, 0.1, and 1μmol/L had less influence on the production of TNF-α, IL-1β and IL-6 in the culture supernatants of alveolar macrophages stimulated with LPS compared with LPS group (allP> 0.05). Nevertheless, 10μmol/L and 100μmol/L ACh notably reduced the production of TNF-α (ng/L: 451.19±30.67, 332.19±32.19 vs. 604.96±22.56), IL-1β(ng/L: 261.08±24.78, 143.98±28.39 vs. 367.06±10.44) and IL-6 (ng/L: 342.75±54.60, 235.48±29.75 vs. 562.69±63.34) in the culture supernatants compared with the LPS group (allP< 0.05).③ The activity of AChE in the LPS group was significantly higher than that in the blank control group (kU/L: 5.21±0.63 vs. 3.09±0.10,P< 0.05). The activity of AChE was successfully inhibited by 1 mmol/L acetylcholinesterase inhibitor Phy pretreatment compared with that in the LPS group (1.51±0.12 vs. 5.21±0.63,P< 0.05).④ The level of TNF-α (ng/L: 183.17±35.44 vs. 451.19±30.67), IL-1β (ng/L: 91.49±12.27 vs. 261.08±24.78) and IL-6 (ng/L: 108.17±22.82 vs. 342.75±54.60) in the culture supernatants of LPS+ ACh+ Phy group was significantly decreased as compared with LPS+ ACh group (allP< 0.05).Conclusions ACh with the final concentrations of 10μmol/L and 100μmol/L can inhibit the LPS induced inflammatory reaction in alveolar macrophages. The acetylcholinesterase inhibitor Phy can reinforce the ACh-mediated anti-inflammatory effect on alveolar macrophages inflammatory model.

Objective To construct an eukaryotic expression vector for TAP genes fused with enhanced green fluorescent protein(EGFP)gene,and to analyze the expression and subcellular localization of the fusion protein in A375 human malignant melanoma cells transfected with the eukaryotic expression vector.Methods A375 cells were cotransfected with the combination of plasmid(P)TAP1-EGFP or pTAP2-EGFP and pDsRed2-endoplasmic reticulum(ER),or with pEGFP-TAP1 and-TAP2,or monotransfected with pTAP1-EGFP or pTAP2-EGFP alone.The monoclonal A375 cells stably expressing TAP were obtained by G418 selection.Then.the distribution and expression of fusion proteins were assessed in A375 cells by using fluorescence microscopy and Western blot,respectively.Flow cytometry was used to measure the expression of HLA class Ⅰ on A375 cells.Results Transfection of A375 cells with pTAP1-EGFP or pTAP1-EGFP and pTAP2-EGFP significantly increased the expression of TAP 1 and TAP 2 in as well as HLA class Ⅰ antigen on A375 cells.The green fluorescence of TAP1-EGFP and TAP2-EGFP overlapped with the red fluorescence of ER marker in cotransfected cells.indicating that TAP was localized subcellularly on the ER.Conclusions The expression vector for TAP-EGFP fusion gene has been constructed cuccessfully and expressed in A375 cells,and the expressed fusion protein is subcelluiarly localized to ER.This study will provide a basis for the research into subsequent immune response following induction of TAP expression.

Actins ; metabolism ; Adult ; Female ; Humans ; Melanoma-Specific Antigens ; metabolism ; Microphthalmia-Associated Transcription Factor ; metabolism ; Perivascular Epithelioid Cell Neoplasms ; metabolism ; pathology ; surgery ; Urinary Bladder ; metabolism ; pathology ; surgery ; Urinary Bladder Neoplasms ; metabolism ; pathology ; surgery

Aged ; Antineoplastic Combined Chemotherapy Protocols ; therapeutic use ; Cyclophosphamide ; therapeutic use ; Doxorubicin ; therapeutic use ; Epstein-Barr Virus Infections ; Female ; Herpesvirus 4, Human ; Humans ; Lymphoma, Large B-Cell, Diffuse ; drug therapy ; pathology ; virology ; Lymphoma, T-Cell, Peripheral ; drug therapy ; pathology ; Neoplasms, Second Primary ; drug therapy ; pathology ; Prednisone ; therapeutic use ; Vincristine ; therapeutic use