The baculovirus expression system has been used extensively for the expression of recombinant proteins in insect cells.Recently,recombinant baculoviruses containing mammalian cell-active promoter element have been used to transduce a broad spectrum of primary and established mammalian cells,including non-hepatic cells.Recombinant baculoviruses have been used successfully for transient or stable gene delivery in mammalian cells in vitro,while the efficiency of delivering gene in vivo is inhibited obviously by complements,but efforts have been made to overcome the problems,for instance,VSV-G-pseudotyped baculoviruses display complement resistance.The mechanism of the transduction is still not clearly understood,though many researches have been done.The baculovirus is able to replicate only in insect cells,but it is incapable of initiating replication cycle in mammalian cells,which guarantees high biosafety of this gene delivery system.In addition,this system is easily manipulated and able to carry large inserts.These attributes will undoubtedly lead to the increased application and continued development of this system for highly effective gene delivery into mammalian cells.

The brown slime inside pipeline of the polluted mineral waters well was analyzed. It was confirmed that the brown slime was a biofilm formed mainly by growth of bacteria contaminant, using microscope analysis. After treated with HCl, the brown crystals and mycelioid matter presented in slimes disappeared. It was verified these were metal deposits. The samples produced Prussia blue deposits by dropping K 4Fe(CN) 6 and HCl, which proved that the metal deposits were iron compound. Also it was believed the biofilm was produced by growth of iron bacteria, mixed with deposits of iron compound. The iron bacteria have been isolated from the slimes and cultured in the laboratory. The colony on agar plate also produced Prussia blue deposits after treated with K 4Fe(CN) 6 and HCl. The cells form of pure culture was the same as that in the samples by electronmicroscope analysis. Therefore, It indicated that the bacteria on biofilm inside pipeline were iron bacteria mainly.

Adult ; Female ; Health Knowledge, Attitudes, Practice ; Health Promotion ; Humans ; Lead ; Male ; Middle Aged ; Occupational Exposure ; prevention & control ; Occupational Health ; Occupational Health Services ; Stearates ; Young Adult

Objective To study the skills of laparoscopy for hight difficulty eholecystectomy.Method Forty-eight cases of hight difficulty laparoscopic cholecystectomy from July 2005 to July 2007 were analyzed retrospectively. Result In 48 cases, 5 cases were converted to open surgery, 2 cases suffered in-cision infection, all the patients recovered. Conclusion According to the operating status and experience of the performer, Calot triangle dissection and judge good opportunity to change open surgery are the key faetora to the successful operation for difficult and complex laparoscopie cholecystectomy, which is safe and feasible.

Adult ; Altitude ; Case-Control Studies ; Humans ; Immunoglobulins ; blood ; Occupational Exposure ; T-Lymphocyte Subsets ; immunology

Nowadays, modern information technology is rapidly developing; traditional novelty assessment service could not satisfy users' demands. The paper introduces an online application and management information system for medical research novelty assessment innovated of Zhuhai Health Information Center, including its background of exploration, system functions and application effects. Using this system to provide service for users could not only promote the efficiency and convenience but also provide new space of development for novelty assessment work.

Objective To analyze the effect of clinical pathways on single disease management.Methods Clinical controlled trials on tumors of uterine,benign biliary tract diseases and benign thyroid neoplasm were collected and related literatures were screened according to the criteria of inclusion.The literature so collected underwent a Meta analysis.Results A total of 21 literatures were included.Meta analysis indicated that statistical difference existed in the total cost of hospitalization(WMD=1046.06,95％CI:- 1281.15 ～ - 810.96,P＜0.00001) and length of hospital stay (WMD=- 2.18,95％CI:-2.59～- 1.76,P＜0.00001)between non-clinical pathways group and clinical pathways group.Conclusion Implementation of clinical pathways can further reduce hospital costs and shorten hospital days of the single disease management.

Objectives: To clarify the diagnostic value of sTFR and its compound parameters sTFR/SF, sTFR/logSF in the differential diagnosis of IDA, ACD and CDID. Methods: Forty nine anemia patients were classified into IDA, ACD and CDID by clinical presentations and the laboratory results. The serum concentration of sTFR was detected by ELISA. The difference of sTFR, sTFR/SF, sTFR/logSF and routine parameters in the three groups and the correlation among sTFR and routine parameters were analyzed. Using ROC curve, the diagnostic value of these parameters in the differential diagnosis of the three diseases were compared. Results: The serum concentration of sTFR in the IDA, ACD and CDID were (50.8?8.2)nmol/L, (33.5?6.9)nmol/L and (22.7?9.9)nmol/L,respectively. The differences among three groups were significant( P

Objective To investigate the alternation of insulin -like growth factor -Ⅱ( IGF-Ⅱ) gene promoter P4 methylation status in hepatocellular carcinoma ( HCC) and explore its relationship with expression of P4 mRNA levels.Methods Liver specimens of 43 patients with HCC and normal liver specimens of 9 control patients were collected in operation .Tissue DNA and total RNA were extracted from these specimens .IGF-Ⅱ P4 methylation status and P4 mRNA expression levels were detected .Results (1)The incidence of IGF -ⅡP4 methyl-ation in HCC group was significantly lower than that in normal liver specimens (16.28%vs 88.89%,χ2 =19.12,P<0.01).(2)The expression level of IGF -ⅡP4 mRNA in HCC group was significantly higher than that that in normal liver specimens[(0.96 ±0.74) vs (0.25 ±0.19),t=5.48,P<0.01].(3)In HCC group,the IGF-Ⅱ P4 mRNA expression level with hypomethylation gene was significantly higher than that without hypomethylation gene [(1.18 ± 0.76) vs (0.32 ±0.27),t=5.28,P<0.01].Conclusion The hypomethylation alternation of IGF -Ⅱ P4 gene promoter which is accomplished by up -regulate P4 mRNA expression has a close relationship with HCC .

In order to promote teaching,this paper analyses the current situation of the teaching and discusses its teaching purpose,contents and methods on reproductive health care.