Objective To analyze the characteristics of benign and malignant breast tumors with 2D and color Doppler ultrasound, and to assess the value of color Doppler ultrasound in the diagnosis of breast cancer. Methods A total of 674 patients (327 malignant and 347 benign) of breast tumor underwent 2D and color Doppler ultrasonogarphy. Two-dimensional ultrasound was used to observe the size, form, margin and internal echo of the tumors;color Doppler was performed to observe the degree of blood flow signal in the tumor, and to measure peak systolic velocity (PSV) and resistance index (RI). Results Totally 671 patients were diagnosed with ultrasound. The size of the tumors were from 0.50 cm×0.41 cm to 5.42 cm×4.10 cm. The ratio of vertical and transverse diameter of 69.11% (226/327) of the malignant tumors ≥1.0. Most tumors (266/327, 81.35%) presented with irregular margin like incised or feet of crab;61.47% (201/327) had microcalcification. Color Doppler found that 92.97% (304/327) of the tumors had blood flow signal;PSV was 15.34-39.76 cm/s, RI was 0.65-0.98, and 91.61% (262/286)≥0.70. Significant differences of the ratio of vertical and transverse diameter, the margin of the tumor, microcalcification and blood flow signal, PSV and RI (P＜0.01) were found between benign and malignant breast tumors. Conclusion The diagnosis and differential diagnosis of benign and malignant breast tumors can be significantly improved with comprehensive analysis of 2D ultrasound, blood flow signal, PSV and RI. Color Doppler ultrasound plays an important role in the diagnosis of breast cancer.

OBJECTIVETo discuss the effect of taurine (Tau) on the proliferation of hypoxia-induced pulmonary artery smooth muscle cells (PASMCs), and study whether the extracellular signal-regulated kinase 1/2 (ERK1/2) signal pathway participated in the Tau-inhibited PASMC proliferation process and the possible molecular mechanism.

METHODThe primary culture was performed for PASMCs in rats. The second to fifth generations were adopted for the experiment. The Tau concentration was 80 mmol x L(-1). The concentration of ERK1/2 blocker (PD98059) was 50 micromol x L(-1). The drug administration time was 24 h. The effect of Tau on the PASMC proliferation was detected by MTT assay, immunofluorescence staining method and western blot under different conditions. The PASMCs were growing were divided into four groups: the normoxia group, the normoxia + Tau group, the hypoxia group and the hypoxia + Tau group. The Western blot was adopted to detect whether the ERK1/2 signal pathway participated in the Tau-inhibited PASMC proliferation process. Subsequently, the PASMCs were divided into five groups: the normoxia group, the hypoxia group, the hypoxia + Tau group, the hypoxia + Tau + PD98059 group and the hypoxia + PD98059 group.

RESULTHypoxia could induce the PASMC proliferation. Under the conditions of normoxia, Tau had no effect on the PASMC proliferation. Under the conditions of normoxia and hypoxia, Tau had no effect on the expression of the tumor necrosis factor-alpha (TNF-alpha) among PASMCs. Tau could reverse the expression up-regulation of hypoxia-induced proliferative cell nuclear antigen (PCNA) (P < 0.01) and Cyclin A (Cyclin A) (P < 0. 05). Under the conditions of normoxia, Tau had no effect on the expression of phosphoryl extracellular signal-regulated kinase 1/2 (p-ERK1/2). Hypoxia could up-regulate the p-ERK1/2 expression (P < 0.01). Tau could reverse the up-regulation of the hypoxia-induced p-ERK1/2 expression(P < 0.01). Both PD98059 and Tau could inhibit the up-regulated expressions of PCNA, Cyclin A and p-ERK1/2. According to the comparison between the single addition of Tau and PD98059 under conditions of hypoxia, the hypoxia + Tau + PD98059 group showed more significant down-regulation in the expressions of PCNA, Cyclin A and p-ERK1/2.

CONCLUSIONTau could inhibit the hypoxia-induced PASMC proliferation, and may regulate it through ERK1/2 pathway.

Animals ; Cell Hypoxia ; drug effects ; Cell Proliferation ; drug effects ; Cells, Cultured ; MAP Kinase Signaling System ; drug effects ; Myocytes, Smooth Muscle ; cytology ; drug effects ; metabolism ; Oxygen ; metabolism ; Pulmonary Artery ; cytology ; drug effects ; metabolism ; physiopathology ; Rats ; Rats, Wistar ; Taurine ; pharmacology ; Tumor Necrosis Factor-alpha ; genetics ; metabolism

AIM: To analyze the pathogens and drug sensitivity of chronic dacryocystitis in order to provide evidence for clinical drug use.
METHODS:Lacrimal secretion of 171 cases with chronic dacryocystitis was sampled for pathogenic bacteria culture identification and drug sensitivity test. Based on the results, the isolation rate of pathogens strains, the pathogens kind of chronic dacryoeystitis, main pathogens of chronic dacryocystitis, and sensitive drug for pathogens were analyzed.
RESULTS: The isolation rate of pathogens strains was 76. 61% ( 131 cases ). The pathogens constituting the chronic dacryocystitis were predominantly gram-positive coccus,the percentage was 72. 52% (95 cases), among which staphylococcus hominis occupied 27. 48% ( 36 cases), staphylococcus epidermidis 16. 79% (22 cases), streptococcus viridans 12. 98% (17 cases). The majority of these bacteria were sensitive to cefoperazone-sulbactam, tobramycin, gentamicin and levofloxacin. For gram -positive coccus, cefoperazone - sulbactam, gentamicin and tobramycin were the most sensitive drug. For gram-negative bacilli, cefoperazone - sulbactam, tobramycin and levofloxacin were most sensitive drug.
CONCLUSION: Staphylococcus hominis is the main pathogen of chronic dacryocystitis, tobramycin can be used as the first choice for local treatment of chronic dacryocystitis.

Orjective:To obtain recombinant CHO-K1 with expressing sPDGFR? and to identify the biological activities of sPDGFR? secreted in non-serum medium.Methods:Recombinant human sPDGFR? expression vector pIRES-Neo3-sPDGFR?-Fc was constructed and then transfected into CHO-K1 cells by using LipofectamineTM 2000.After screened with G418 in 8 weeks,some monoclone cells were selected randomly to amplify in 96-well-plate to 24-well-plates,and then to identify positive cell clones by RT-PCR.Furthermore,the candidate cell clones were test by Real-Time PCR and Western blot assays.Finally,anti-proliferation activities of the expressed sPDGFR? were analyzed by MTT.Results:sPDGFR?-Fc was cloned into pIRES-Neo3 correctly.The sPDGFR?-Fc expression level in recombinant CHO-K1 cell clones were concordant in between Realtime PCR and Western blot assay.sPDGFR?-Fc obtained from cultured non-serum medium of positive CHO-K1 could significantly inhibit proliferation of vascular endothelial cell.Conclusion:Successed to select recombinant CHO-K1 cell lines with high expressed sPDGFR?-Fc.The sPDGFR?-Fc can inhibit the cell proliferation significantly and it means sPDGFR?-Fc might be a new anti-cancer drug in the future.

Objective To investigate the expression of lipid rafts (LRs) and actin cytoskeleton (F-actin) in the peripheral blood B lymphocytes of patients with systemic lupus erythematosus (SLE).Methods Peripheral blood mononuclear cells (PBMCs) were separated by Ficoll-Hypaque.B lymphocytes were isolated by positive selection from PBMCs.Membrane staining for LRs was achieved with FITC-conjugated cholera toxin B (CTB).The level and distribution of LRs were studied by flow cytometry and confocal microscopy.Staining for F-actin was carried out with Rhodamine phalloidin.The expression of F-actin was analyzed by confocal microscopy.In an in vitro examination,the effect of Leflunomide on lipid rafts in B lymphocytes from SLE was analyzed.Disease carried out was measured using the SLE disease activity index (SLEDAI).Analysis of the enumerical data was performed using ANOVA or paired-samples t test.Correlation was examined by Pearson's rank correlation test.Results The number of CTB-binding lipid rafts in B cell from active SLE patients or from SLE patients in disease remission.who were treated with immunosuppressive drugs was higher than B cells from healthy controls [(59+4)％,(51±5)％,(33±4)％,F=9.21,P=0.001].Confocal microscopy revealed that in B cell from healthy controls,lipid raft was found to be small and uniformly distributed on the plasma membrane.F-actin was found mainly in the cortical region of the cells.This pattern was different from the pattern seen in B cells from patients with SLE,which presented with stronger staining and irregular large clustering of LRs,with a decrease in F-actin levels.In addition,the number of CTB-binding LRs in B cells from the active SLE patients was correlated significantly with the SLEDAI score (r=0.632,P=0.028).Furthermore,thein vitro results showed that leflunomide treatment reduced the number of CTB-binding LRs in B cell from SLE patients [(48±5)％ vs (39±5)％,t=2.29,P=0.048].Conclusion The altered expression of Lipid raft and F-actin can been seen in B lymphocytes in SLE,and modulation of LRs and F-actin expression may be a potential approach in the treatment of SLE.

Anelectrochemicallyreducedgrapheneoxide/goldnanoparticle-chitosan(ERGO/AuNP-CS) composite film modified glassy carbon electrode ( GCE) was constructed by directly electrochemical reduction of GO, and then assembly of AuNP-CS polycation on the surface. The surface morphologies of different modified electrodes including bare GCE, GCE/GO, GCE/ERGO and GCE/ERGO/AuNP-CS were characterized by scanning electron microscopy ( SEM ) . The differential pulse voltammetric behaviors of the electrodes were investigated, and the results indicated that the composite of ERGO/AuNP-CS exhibited excellent electrocatalytic oxidation activity to uric acid ( UA) molecule. In 0. 10 mol/L of phosphate buffer solution (pH=6. 5) with a scanning rate of 100 mV/s, the proposed composite film modified electrode showed a linear electrochemical response to UA in the range of 0 . 05-110 μmol/L with a detection limit of 12. 4 nmol/L ( S/N = 3 ). The electrode displayed good selectivity, reproducibility and stability in the determination of UA in human serum and urine samples with a recovery of 93 . 8%-104 . 1%. The detection results were agreed with those of conventional spectrophotometry and uricase Kit methods.

Benzene ; analysis ; Chemical Industry ; Chromatography, Gas ; methods ; Humans ; Occupational Exposure ; analysis ; Toluene ; analysis ; Trichloroethylene ; analysis ; Xylenes ; analysis

Adult ; Antibodies, Monoclonal, Murine-Derived ; therapeutic use ; Antigens, CD20 ; metabolism ; Antineoplastic Agents ; therapeutic use ; Antineoplastic Combined Chemotherapy Protocols ; therapeutic use ; Cervical Intraepithelial Neoplasia ; drug therapy ; metabolism ; pathology ; surgery ; virology ; Cyclin-Dependent Kinase Inhibitor p16 ; metabolism ; Cyclophosphamide ; therapeutic use ; Doxorubicin ; therapeutic use ; Female ; Follow-Up Studies ; Humans ; Lymphoma, Follicular ; drug therapy ; metabolism ; pathology ; surgery ; virology ; Neoplasm Staging ; Neprilysin ; metabolism ; Papillomavirus Infections ; Prednisone ; therapeutic use ; Receptors, Complement 3d ; metabolism ; Rituximab ; Uterine Cervical Neoplasms ; drug therapy ; metabolism ; pathology ; surgery ; virology ; Vincristine ; therapeutic use

Objective To explore the unique relationship between Willis circle and cerebral watershed infarction in a Chinese population. Methods A retrospective analysis of cerebral CT angiography was conducted in 471 non-cere?bral watershed infarctions and 93 MRI-diagnosed cerebral watershed infarctions (CWI)(including External CWI and In?ternal CWI)in Department of Neurology of our hospital and compare the related variations and types of Willis circle be?tween these groups. Results Compared with non-cerebral watershed infarctions, the prevalence of Uni-FTP (short for“fetal type of the Posterior cerebral artery”) in E-CWI (36.4%, P<0.05) and Bi-FTP in I-CWI (0%, P<0.05) was signifi?cantly higher in cerebral watershed infarctions. Conclusion FTP is probably an unique risk factor in Chinese patients with CWI.

Armillariella tabescens EJLY2098 was capable of secreting p-mannanase by konjac inducement. A 34 orthogonal design was applied to determine the optimum medium of inducing mannanase by Armillariella tabescens EJLY2098. The results suggested that Armillariella tabescens EJLY2098 secreted the high-activity enzyme in the optimum medium, which was composed of 2% konjac, 1% peptone, 25% potato juice,0.3% KH2PO4,15% MgSO4?7H2O, 0.01% VitB1. Purified by DEAE-anion exchange chromatography, two eluting peaks (P1 and P2) with the p-mannanase activity were obtained, and one of them (named?-mannanase P2) was a single band by the SDS-PAGE, and the molecular weight of?-mannanase P2 was 78. 9kDa. The isoelectric point of?-mannanase P2 was estimated to be 4.0-4. 1. The optimum activity for the enzyme was found at 60℃and pH4. 0 - 6. 0, and the enzyme was stable between pH4. 5 - 6. 0. The activity of?-mannanase P2 were enhanced by Na+ and Ba2+ . This?-mannanase can be used in feed industy. a new fungi secreting?-mannanase was obtained, providing an important base for cloning mannanase gene and constructing recombin microbe expressing?-mannanase .