3 cm in diameter was 65.6%, while the rate in those

OBJECTIVETo investigate whether programmed death ligand 1 (PD-L1) expressed in the periodontal tissue of chronic periodontitis and the correlativity of PD-L1 and different degrees of chronic periodontitis, provide experience for immunoregulation mechanism, clinical treatment and prognosis of chronic periodontitis.

METHODSGingiva and periodontal tissue of healthy people and chronic periodontitis patients were collected. Based on clinical probing, periodontal tissue were classified into three groups: periodontal tissues of healthy people, periodontal tissue of mild chronic periodontitis, periodontal tissue of severe chronic periodontitis. Fluorescent quantitation polymerase chain reaction was applied to explore the expression of PD-L1 mRNA in the periodontal tissue of the different groups. Western blot and immunohistochemistry method were utilized to test the expression of PD-L1 protein in the periodontal tissue of the different groups. Combining with clinical image data, the relationship between differentially expressions of PD-L1 and different degrees of chronic periodontitis was analyzed.

RESULTSThe relative expression quantity of PD-L1 in the periodontal tissue of the mild chronic periodontitis was significantly higher that of the severe chronic periodontitis (P<0.01). The relative expression quantity of PD-L1 in the periodontal tissue of healthy subjects and severe chronic periodontitis had no statistical significance (P>0.05).

CONCLUSIONThe expression of PD-L1 in the periodontal tissue negativelv regulates inflammatory periodontal tissue damage.

B7-H1 Antigen ; Chronic Periodontitis ; Gingiva ; Humans ; Polymerase Chain Reaction ; RNA, Messenger

Objective To understand the infectious pathogens distribution and drug resistance in the surgical departments of our hospital from 2007 to 2011 to provide the basis for the anti-infective therapy in the surgical patients.Methods TheVitek automatic microbial identification system was used to identify bacteria and fungi.The Kirby-bauer (KB)method was used to study the antibi-otic resistance in the pathogens isolated from the patients in the surgical departments.Results 1218 strains of pathogens were iso-lated,including 669 strains(55%)of Gram-negative bacteria,440 strains(36%)of Gram-positive bacteria and 109 strains (9%)of fungi.The top five of bacteria in turn were Escherichia coli in 182 strains(15%),Pseudomonas aeruginosa in 171 strains (14%), Staphylococcus aureus in 105 strains (9%),Klebsiella pneumoniae in 86 strains (7%)and Enterococcus faecalis in 61 strains(5%). Among 283 strains of Escherichia coli,Klebsiella pneumoniae and proteus mirabilis,the detection rate of ESBLs producing strains was 29.7%.Methicillin-resistant Staphylococcus aureus(MRSA)accounted for 63% of Staphylococcus aureus.The resistance rates of Staphylococcus and Enterococcus to multiple antibacterial drugs were above 50%.Enterobacteriaceae bacteria were more sensi-tive to carbapenems as well as compound antibacterial drugs containing enzyme inhibitor.The lowest resistance rate of Acinetobact-er to cefoperazone/sulbactam was 21.1%.Pseudomonas aeruginosa showed the most sensitive to compound antibacterial drugs con-taining enzyme inhibitor and its lowest resistance rate to cefoperazone/sulbactam was 17.4%.Conclusion The drug resistance phe-nomenon in the pathogens isolated from the surgical patients are relatively serious,this study provides some basis for the preventive antimicrobial drugs use in the perioperative period and the empirical medication in the infection therapy.

Objective To explore the relationship between the ET-1 and the oncogenesis, development of human esophageal cancer. Methods RT-PCR and Western blotting were employed to detect the expression of ET-1 and ETAR in the tissues of esophageal cancer and normal esophageal mucous membrane from 76 esophageal cancer patients admitted by our hospital from March to December in 2002. Results There was positive ET-1 mRNA expression in 82.7% (62/75) of the specimens of esophageal cancer and in 60% (45/75) of normal tissue and the ET-1 mRNA expression had a relation with histological grade, lymph node metastasis and clinical staging of esophageal cancer (P

WHO 2015 Lung Tumor Histologic Typology presents spread through air spaces (STAS).Before,some scholars have realized this pathological feature.STAS is considered associated with the prognosis of lung cancer patients.This article reviews the progress of STAS and prognosis of patients with lung cancer.

Humans ; Lung Neoplasms/surgery* ; Neoadjuvant Therapy ; Pneumonectomy ; Retrospective Studies ; Treatment Outcome ; Minimally Invasive Surgical Procedures

ObjectiveTo construct one recombinant adenovirus AdE7E6 expressing HPV16 E6 and E7 fusion protein as candidate for HPV16 therapeutic vaccine.MethodsThe codon-optimized E6 and E7 gene,were fused to create one open reading frame,then inserted into adenovirus vector pCD316.A strain of recombinant adenovirus was constructed through homologous recombinant in 293 cells,and identified by PCR and Western blot.Finally,it was employed to study it's immunogenicity and the activity of the tumor growth regression.ResultsThe PCR result showed that E6E7 fusion gene had been integrated in recombinant Ad5 DNA.Western blot test confirmed that the E6E7 fusion protein was highly expressed in 293 cells infected with Ad5E7E6 recombinant adenovirus.The recombinant adenovirus elicited significant E7 specific CD8+ T lymphocyte response in vaccinated mice.These responses could completely prevent the TG-1 tumor cell bearing mice treated with AdE7E6 from developing into tumor.ConclusionThese results suggested that rAd5E7E6 could be a potent vaccine candidate for the treatment of HPV16-associated tumors and their precancerous transformations.

OBJECTIVETo develop a simple and rapid capillary electrophoresis (CE) method for the separation and determination of four active organic acids including salicylic acid, syringic acid, benzoic acid, and anthranilic acid in Radix Isatidis.

METHODThe HPCE system consisted of a fused-silica capillary column of 47.3 cm (38.3 cm to the detector) x50 microm i.d. and a mixture ofacetonitrile-borate buffer (15% acetonitrile, 25 mmol L(-1) borate, 15 mmol L(-1) beta-CD, pH 9.10) solution as the operating buffer. The applied voltage was 11.5 kV and the UV detection was set at 220 nm. The effects of the applied voltage, detection wavelength, and the pH of buffer, the concentration of buffer, acetonitrile and beta-CD were investigated.

RESULTThe linear calibration rang was 3.0-90 mg L(-1) (r=0.9994) for salylic acid, 4.0-120 mg L(-1) (r=0.9995) for syringic acid, 2.0-60 mg L(-1) (r=0.9998) for benzoic acid and 5.0-100 mg L(-1) (r=0.9992) for anthranilic acid. The recoveries of salylic acid, syringic acid, benzoic acid and anthranilic acid were 95.9%-102.6%, 98.6%-103.4%, 98.7%-104.1%, 96.1%-104.3% respectively. The detection limits of salylic acid, syringic acid, benzoic acid and anthranilic acid were 0.7, 1.1, 1.2 and 1.5 mg L(-1), respectively.

Benzoic Acid ; analysis ; Electrophoresis, Capillary ; Gallic Acid ; analogs & derivatives ; analysis ; Isatis ; chemistry ; Linear Models ; Reproducibility of Results ; Salicylic Acid ; analysis ; Sensitivity and Specificity ; ortho-Aminobenzoates ; analysis

The FPGA-based phased-signal generator described in this paper meets the requirement of massive output channels and high resolution of HIFU. After experimental measurements, this phased-signal generator can output 256 channels of phase signals and each channel has a phase resolution of 2nS. The phased-signal generator also has many other advantages such as simple implementation method and high reliability.
Equipment Design ; High-Intensity Focused Ultrasound Ablation ; instrumentation

Objective: To detect the expression level of early and late protein of vaccinia virus and to preliminarily explore replication-defective mechanism of highly attenuated NTV strain of vaccinia virus Tiantan. Methods: We constructed prokaryotic expression vector, expressed and purified homologous early protein E3 and late protein A27 closely related to replication and prepared mouse polyclonal antiserum by immunizing mice with homologous proteins. Early and late protein expression levels of NTV were detected. Results: We have expressed and purified vaccinia virus proteins respectively in E. coli expression system and prepared homologous mouse polyclonal antiserum. Early protein E3 and late protein A27 could be highly efficient expression in NTV infected non-permissive Hela cells, while expression of late protein F17 was blocked detected by Western blot. Conclusions The expression limitation of late protein F17 may be an explanation for the replication-defective mechanism of NTV.