45 cases of childhood extrinsic asthma (CEA) were divided into the treatment group with carboxymethykited starch (CMS) (n=30) and the control group (n=15). The total effective rate of the former was 63% (P

Objective To apply the six sigma(6σ) quality management method to quantitatively analyze the quality control data of the detection items from different groups and conduct the comparison for analyzing the evaluation performance and improving the laboratory quality .Methods The data of the internal quality control and the external quality assessment were collected from35 de‐tection items in the clinical chemistry laboratory group and the hematology laboratory group during 2013 ,the σ value of every item was calculated and the analytical performance of the detection item was analyzed .Results Among 23 clinical detection items in the biochemistry group ,there were 10 items of σ ≥ 6 ,6 items of 5 ≤ σ < 6 ,3 items of 4 ≤ σ < 5 ,3 items of 3 ≤ σ < 4 and 1 item of σ < 3 , the average σ was 5 .962 .Among 12 clinical detection items in the hematology group ,there were 8 items of σ ≥ 6 ,2 items of 5 ≤ σ <6 ,2 items of 4 ≤ σ < 5 ,the average σ value was 7 .38 .The detection items in which the analytic performance did not reach 6σ in the biochemistry group accounted for 37% of the total items ,which in the hematology group accounted for 11% ,the differences in theσ quality level of detection items between the biochemistry group and the hematology group had statistical significance(P< 0 .05) , the differences in the σ quality level of detection items between the matched reagent and the non‐matched reagent had statistical sig‐nificance (P< 0 .05) .Conclusion The 6σ quality management method can be used used in the quality evaluation of clinical detection items and can be widely used in the quality management of clinical laboratory .

Objective:To evaluate the optimized efficacy of single-injection thoracic paravertebral block (TPVB) with multiple adjuvant drugs combined with general anesthesia for modified radical mastectomy (MRM) for breast cancer.Methods:Sixty American Society of Anesthesiologists physical statusⅠ or Ⅱ patients, aged 20-60 yr, with body mass index<30 kg/m 2, scheduled for elective primary modified radical mastectomy for breast cancer under general anesthesia, were divided into 2 groups ( n=30 each) using a random number table method: single-injection TPVB with multiple adjuvants group (group PV-SI) and continuous infusion via TPVB group (group PV-CI). In group PV-SI, single-injection TPVB was performed with 0.25% ropivacaine 25 ml, dexamethasone 3 mg, buprenorphine 120 μg, and adrenaline 2.5 μg/ml, and general anesthesia was performed after induction of anesthesia.In group PV-CI, the mixture of 0.25% ropivacaine 25 ml and epinephrine 2.5 μg/ml was injected after induction of anesthesia, and then 0.125% ropivacaine 8 ml/h was continuously infused via TPVB until 48 h after operation.At the end of operation, a patient-controlled intravenous analgesic pump was connected and programmed to deliver a bolus dose of morphine 2 mg with a lockout interval of 10 min and no loading dose and background infusion.The duration of postoperative analgesia, total consumption of morphine within 48 h after operation, occurrence of nausea and vomiting, and patient′s recommendation and satisfaction were recorded. Results:There was no significant difference in the duration of postoperative analgesia, total consumption of morphine within 48 h after operation, incidence of nausea and vomiting, and rates of patient′s recommendation and satisfaction between PV-SI group and PV-CI group ( P>0.05). Conclusion:Single-injection TPVB with multiple adjuvants combined with general anesthesia can be used as an optimized strategy to improve the postoperative analgesia in the patients undergoing MRM for breast cancer.

Objective To survey the prevalence of elderly asthmatics among urban and rural residents of Liaoning Province and to provide data for preventive and therapeutic policies of asthma. Methods Stratified cluster disproportional 2.5‰ random sampling survey for 116 276 re sidents was performed using uniform scheme, procedures and questionnaire. Among them 12 735 cases were over 60 years old. Results Totally 522 cases (207 male and 315 female) were diagnosed as asthma, the overa ll prevalence was 1 25% and that of elderly was 4 09% ( male 3 26%, female 4 92%, P

Objective To establish the method of identifying MRSA with Taqman-fluorescence quantitative PCR basing on mecA/nuc/fem B three gene combined detecting.Methods Taking the coagulase positive MRSA,which isolated from the clinical samples and confirmed by VITEK 2 compact microbial analyzer,as the research obj ect,designed mecA/nuc/fem B specific PCR primers and Taqman fluorescent probe by bio-software PrimerPremier 5 and Designer Beacon 7,FAM,HEX and ROX markers were used to label the fluorescent probe at 5’,and the end of 3’was labeled with BHQ1,detected by fluo-rescence quantitative PCR instrment.Results ①1 g/dl gel electrophoresis results showed that the primer’s specificity of mec A/nuc/fem B were good,and molecular weight of the amplification band consistent with the expected molecular weight and no non-specific amplification band.②Three genes were obtained specific amplification in a single tube single channel and single tube multiple channel detection in PCR,and the three gene amplification effect in a single tube single tube single chan-nel and multichannel PCR similar.Conclusion Successfully established a method of multi channel Taqman-probe fluores-cence quantitative PCR identification of MRSA,mec A/nuc/fem B combined detection can effectively differentiate coagulase negative and positive MRSA,improve the accuracy of identification.

Background Lead exposure induces microglial cell death, of which the mechanism is unclear. Ferroptosis is a new death form and its role in microglia death has not been reported. Objective To investigate the role of ferroptosis in microglia following lead exposure in order to provide a theoretical basis for the mechanism of lead neurotoxicity. Methods Microglial cell line BV-2 cells were co-cultured with 0, 10, 20 and 40 μmol·L⁻¹ lead acetate for 24 h. The 40 μmol·L⁻¹ lead acetate group with iron chelator (DFO) was named the 40+DFO group. Changes in BV-2 cell morphology after lead exposure were observed under an inverted microscope; tissue iron kit and glutathione kit were used to detect intracellular iron and glutathione (GSH) respectively; flow cytometry was applied to detect lipid reactive oxygen species (lipid ROS) immunofluorescence intensity. Western blotting and qPCR were adopted to detect the expressions of glutathione peroxidase 4 (GPX4), solute carrier family 7 member 11 (SLC7A11), transferrin receptor 1 (TFR-1), divalent metal transporter 1 (DMT1), ferroportin 1 (FPN1) protein and mRNA. Results Compared with the control group, the number of BV-2 cells decreased with increasing doses of lead and the cells showed a large, round amoeboid shape. The intracellular levels of iron of BV-2 cells were (1.08±0.04), (1.29±0.03), and (1.72±0.10) mg·g⁻¹ (calculated by protein, thereafter) in the 10, 20, and 40 μmol·L⁻¹ lead acetate groups, respectively, significantly higher than that in the control group (P<0.05), and the intracellular level of iron in the 40+DFO group, (1.34±0.10) mg·g⁻¹, was lower than that in the 40 μmol·L⁻¹ lead acetate group, (1.72±0.03) mg·g⁻¹ (P<0.05). Compared with the control group, the TFR-1 and DMT1 protein and mRNA expressions were increased in BV-2 cells in the 10, 20, 40 μmol·L⁻¹ lead acetate groups (P<0.05), especially in the 40 μmol·L⁻¹ lead acetate group; the FPN1 protein expression did not change significantly, but the FPN1 mRNA expressions in BV-2 cells in the 10, 20, 40 μmol·L⁻¹ lead acetate groups were significantly decreased (P<0.05). Compared with the control group, the intracellular GSH level decreased and the lipid ROS content increased in all three lead acetate groups; compared with the 40 μmol·L⁻¹ lead acetate group, the GSH level increased by 12.30% and the lipid ROS content decreased by 13.00% in the 40+DFO group (P<0.05). The expressions of GPX4 protein were reduced to 50.00%, 35.00%, and 17.00% of that of the control group in the 10, 20, and 40 μmol·L⁻¹ lead acetate groups respectively, while the expressions of GPX4 mRNA were also significantly reduced; the expressions of SLC7A11 protein and mRNA in the 20 and 40 μmol·L⁻¹ lead acetate groups were lower than that in the control group, with the most significant decrease in the 40 μmol·L⁻¹ lead acetate group (P<0.05). Conclusion Lead exposure could induce ferroptosis in BV-2 cells, in which iron transport imbalance and oxidative damage might be involved.

{L-End}Objective To investigate the effect and mechanism of low dose metformin in delaying pulmonary fibrosis in silicosis mice. {L-End}Methods The specific pathogen free C57BL/6 male mice were randomly divided into four groups,with six mice in each group. Mice in the silicosis model group and the metformin intervention group were given 20 μL of a mass concentration of 250 g/L silica suspension, and mice in the blank control group and the drug control group were given 20 μL of 0.9% sodium chloride solution, using tracheal exposure method. After 72.0 hours of dust exposure, the mice of drug control group and metformin intervention group were intraperitoneally injected with metformin at a dose of 65 mg/kg body mass, while the mice in the blank control group and the silicosis model group were given 0.9% sodium chloride solution at the same volume, once every other day for 28 days. After the treatment, histopathological change of the lungs was observed, lung organ coefficient was calculated, degree of pulmonary fibrosis was evaluated with Ashcroft score, and mRNA expression of fibronectin (Fn)1 and collagen typeⅠ(COLⅠ) alpha 1 (Col1a1) in lung tissues were detected by real-time fluorescence quantitative polymerase chain reaction. The relative expression of FN and COLⅠ in lung tissues was determined by Western blot. {L-End}Results The results of histopathological examination of the lungs showed that there were no inflammation and fibrosis in the lungs of mice in the blank control group and the drug control group; mice in silicosis model group had inflammation and fibrosis in lung; the degree of lung inflammation and fibrosis was reduced in the mice of metformin intervention group compared with the silicosis model group. The lung organ coefficient, Ashcroft score, the relative expression of Fn1 and Col1a1 mRNA, the relative expression of FN and COLⅠprotein in lung tissues increased in silicosis model group (all P<0.05), compared with those in both blank control group and drug control group. The indexes above decreased of mice in the metformin intervention group than those in the silicosis model group (all P<0.05). {L-End}Conclusion Low-dose metformin can delay the progression of pulmonary fibrosis in silicosis mice. The mechanism may be related to metformin's improving excessive deposition of extracellular matrix induced by silica.

Objective:To preliminarily observe the clinical efficacy of microwave hyperthermia combined with intensity-modulated radiotherapy (IMRT) and chemotherapy for patients with locally advanced gastric cancer.Methods:Forty patients who could not been operated or refused operation were enrolled in this clinical trial, who were confirmed as locally advanced proximal or distal gastric cancer by gastroscopy pathology and imaging. Radiotherapy was delivered by IMRT technology for 5 times per week with a total dose of 46 to 56 Gy (median dose of 50 Gy) in 25 to 28 fractions. Synchronous hyperthermia was given at 42 to 44℃ twice a week, 45 min/time. S-1 or capecitabine-based synchronous chemotherapy was performed, d1-14/3 weeks. The symptom remission rate, adverse reactions, objective remission rate (complete and partial remission) and survival were observed.Results:A total of 40 patients, aged between 56 and 83 years (median age of 71 years), were enrolled in this study. The male-to-female ratio was 7: 1. Among them, 38 cases (95%) showed symptom remission. The most common adverse reactions were grade 1-2 gastrointestinal reactions and leukopenia. The objective remission rate was 87.5%, the 2-year progression-free survival and overall survival rates were 68.6% and 70.5%, respectively.Conclusion:Preliminary findings demonstrate that microwave hyperthermia combined with chemoradiotherapy achieve satisfactory outcomes and yield tolerable toxicity in patients with locally advanced gastric cancer.

Objective To explore the mechanism of action of curcumin in the treatment of silicosis by network pharmacology combined with molecular docking technology. Methods The targets prediction network of curcumin in treating silicosis was established based on the collection of targets of curcumin and silicosis in multiple databases, cross-targets were submitted to the STRING database, and their connectivity was analyzed by Cytoscape software. Gene ontology (GO) function analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis were performed on the top 20 genes. The molecular docking was performed on the key targets to study the mechanism of action of curcumin in treating silicosis. Results A total of 311 targets related to curcumin, 270 targets related to silicosis, and 74 cross-targets were obtained from the databases. GO function analysis revealed 2 665 related pathways, and KEGG pathway enrichment analysis revealed 188 related pathways. Molecular docking results showed that curcumin had good binding ability with the targets of mitogen-activated protein kinase 3 (MAPK3), interleukin (IL) 6, serine/threonine kinase 1 (AKT1), vascular endothelial growth factor A (VEGFA), signal transducer and activator of transcription 3, albumin, Jun proto-oncogene, tumor necrosis factor (TNF), IL1B, tumor protein p53, C-C motif chemokine ligand 2 and fibronectin 1. Conclusion The therapeutical effects of curcumin on silicosis were implemented through multi-targets and multi-pathways. Curcumin may play a role in the treatment of silicosis by binding to the core targets MAPK3, IL6, AKT1, VEGFA and TNF and regulating the MAPK, IL6, TNF, phosphatidylinositol 3-kinase/protein kinase B and VEGF signaling pathways.

Objective To detect and analyze the susceptibility genes of methyl acetate poisoning in patients by whole exome sequencing. Methods Two patients with occupational acute severe methyl acetate poisoning and their first-degree relatives who work in the same occupation and position with similar working hours were selected as the research subjects by judgment sampling method. Peripheral blood was collected for whole exome sequencing. The sequencing data was compared with the public genome database to screen the mutation sites and find out the gene sites related to methyl acetate poisoning. The suspected pathogenic mutation genes were annotated and interpreted. Results The results of whole exome sequencing showed that there were 40 differential genes between the patients with methyl acetate poisoning and their first-degree relatives, including 80 single nucleotide polymorphisms and eight Indel with specific marker sequence index. Among these, the genes with strong correlation were carboxyesterase 1 (CES1) and mucin (MUC) 5B. The CES1 gene loci c.248C>T (p.Ser83Leu) heterozygous mutations, MUC5B gene loci c.6635C>T (p.Thr2212Met) and c.7685C>T (p.Thr2562Met) heterozygous mutations in patients with methyl acetate poisoning were detected. They were missense mutations. By constructing a protein-protein interaction network, a total of 11 pairs of interactions with high levels of evidence were identified, involving genes such as lysine methyltransferase 2C, HECT and RLD domains containing E3 ubiquitin protein ligase 2, neutrophil cytoplasmic factor 1, nicotinamide adenine dinucleotide phosphate oxidase 3, C-terminal binding protein 2, zinc finger protein 717, FSHD region gene 2 family member C, FSHD region gene 1, MUC4, MUC6, MUC5B, and MUC12. Conclusion The polymorphism of CES1 and MUC5B genes may be related to the occurrence and development of methyl acetate poisoning in patients.