Adolescent ; Adult ; Aged ; Diagnosis, Differential ; Ependymoma ; pathology ; Female ; Follow-Up Studies ; Humans ; Immunohistochemistry ; Magnetic Resonance Imaging ; Male ; Meningeal Neoplasms ; diagnostic imaging ; metabolism ; pathology ; surgery ; Meningioma ; diagnostic imaging ; metabolism ; pathology ; surgery ; Mucin-1 ; metabolism ; Oligodendroglioma ; pathology ; Tomography, X-Ray Computed ; Vimentin ; metabolism ; Young Adult

Calcaneus ; injuries ; surgery ; Fracture Fixation, Internal ; Fractures, Bone ; surgery ; Humans

Abstract Objective: To study the relationshiop between the HBV pre-c mutant and the clinical the, the host immunity. Methods: Mu-tation specific PCR(msPCR) was employed for detecting pre-c mutant in 92 cases with HBV-DNA positive;T subpopulations were determinedby APAAP immune-bridge assay; the cytokines (TNF?、 sIL-2R ) levels by ELISA. Results: 57 cases had Pre-c mutant, the rate was ahaut 62 %;pre-c mutant existed popularly in different e systems status, mainly in anti-HBe(+) serum. The reat increased with the deterioration of liverfunction, and was highest in fulminant hepatitis, the percentage of CD4 T lymphocyte and the ratio of CD4/CD8 were aignificantly lower in mu-tational group than in wild group,but CD8 T lymphocyte was obviously higher, the quantity of sera TNF? and sIL-2R in mutational group wereobviously higher than in wild group, both groups were obviously higher than control group. Conclusion:PreC 1896 mutant existed popularly inpatients with HBV infection. There were more serious disturbance in host immunity in mutant group. The mutant may be associated with the pre-ssare of host immune system.The mutant type virus could provoke host immunity resulting in severe liver damage.

Autoimmune Diseases ; drug therapy ; pathology ; Cholangitis ; drug therapy ; immunology ; pathology ; Cholangitis, Sclerosing ; drug therapy ; immunology ; pathology ; Hepatitis, Autoimmune ; drug therapy ; immunology ; pathology ; Humans ; Interferon-gamma ; therapeutic use ; Liver Cirrhosis, Biliary ; drug therapy ; immunology ; pathology ; Ursodeoxycholic Acid ; therapeutic use

In order to improve the expression level of segment of GABAA receptor a1 subunit in E. coli, growth conditions of the recombatant, which influence the final yield of protein expression, including growth medium, inoculation ratio, temperature, pH, rotation speed, inducing time and concentration of IPTG and so on, were studied in shaking flasks. The results indicated that, with 3% inoculation ratio, cultured 3.5 hours at 37℃, and then induced 5 hours by IPTG at 32℃, the yield of GABAA receptor protein was 95mg/L and the biomass was 3.25 g/ L. In contrast, using a 16 L stirred fermentor instead of shaking flasks, the highest level of the protein expression, 136mg/L with 4.95g/L of biomass, was achieved after fermenting 5.5 hours.

The specific ScFv gene against botulinum neurotoxin A (BoNTa)was cloned into pPIC9k. Positive integrators were screened by increasing the dose of G418 in culture and expressed in Pichia pastoris GS115. As a result, engineered recombinant clone were obtained. 26 kD product of interest was seen easily in SDS-PAGE. Expression of human ScFv got the highest level 15% of total secreted proteins during 72～84 h after 1% methanol inducing. Purification of ScFv was finished by two steps: gel filter and ion exchange. Competing ELISA showed that recombinant ScFv could compete with antiserum to specific bind BoNTa.

Objective To investigate the relapse risk assessment for patients with acute promyelocytic leukemia(APL)through testing PML-RAR? fusion gene by real-time quantitative polymerase chain reaction(RQ-PCR).Methods Relative copies of PML-RAR? fusion gene were measured in 25 patients with APL in phases of first diagnosis,complete remission(CR)and relapse.The minimal residual disease(MRD)situations were also monitored in 6 of the 25 patients.Results Different PML-RAR? fusion gene expression levels were observed in patient groups of different phases of the disease.(P

BACKGROUND: Gene therapy is a popular topic in domestic and overseas studies on biological therapy for brain tumor.OBJECTIVE: By using a newly constructed eukaryotic expression vector of pCR3-TK, the effect of the HSV-TK/ACV system on the proliferative activity of human glioma cells was investigated.DESIGN: Experimental study based on cells.SETTING: Department of neurosurgery and department of oncology in a university hospital.MATERIALS: The study was conducted at the National Key Laboratory of Veterinary Biotechnology of Harbin Veterinary Research Institute from January to April in 2004. The eukaryotic expression vector of pCR3-TK was constructed by the author. The TJ905 strain was a gift from professor Pu Pei-yu, who worked in the Neurology Institute of Tianjin city. The nontransfected cells and the cells transfected with pCR3-Uni vector were set as controls.METHODS: By using Lipofectamine(a cationic liposome), the pCR3-Uni vector and the recombinant pCR3-TK plasmid(inserted with HSV-TK gene)were transfected into the human glioma cell strain-TJ905. Then the positive clones were picked out and were given ACV(50 mg/L) . Totally 72 hours later, the cover slips were collected and silver staining for nucleolus organizer regions(AgNORs) was performed.MAIN OUTCOME MEASURES: After the ACV treatment and AgNORs staining, the numbers of silver-stained granules in TJ905 cells with or without transfections were counted respectively.RESULTS: In those cells transfected with HSV-TK gene, after ACV treatment, a significant decreasing in proliferative activity could be observed, and the average numbers of the silver-stained granules in cells transfected with pCR3-Uni or pCR3-TK were 14.33 and 6.67 respectively( P ＜ 0.01).CONCLUSION: As an easy-to-operate method, AgNOR counting is helpful for the studies on the proliferative activity of cells and the investigations into the potential anti-tumor mechanism of the HSV-TK/ACV system.

Objective:To explore the antibacterial effect of Belamcanda Chinensis DC and Por tulaca oleracece L on P.aeruginosa (PA) in vitro.Methods:Fourty six strains PA were tested for minimum inhibition concentrati on ( MIC) by water decoct agents of the two drugs.MIC50 and MIC90 were st atistically studied.Results:For Belamcanda Chinensis DC,MIC was 31.25～3.90 g/L;MIC50 was 7 .81 g/L,and MIC90 was 15.62 g/L;whereas， for portulaca oleracece L,MIC was 31 .25～7.81 g/L, MIC50 was 15.62 g/L,and MIC90 was 31.25 g/L.Conclusion:Both of the two drugs have stronger antibacterial effects on P.ae ruginsosa in vitro.

Objective To explore the role of miR-98 in peripheral blood mononuclear cells (PBMC) in the pathogenesis and development of childhood asthma.Methods A total of 43 cases of asthmatic children and 30 cases of healthy controls were enrolled in the study.Peripheral blood mononuclear cells were isolated in both healthy subjects and asthmatic children in acute attack and remission stages.The expressions of miR-98 and interleukin-4(IL-4) and IL-13 mRNA were detected by real-time quantitative PCR.Results The miR-98 levels of asthmatic children in attack stage were significantly lower than those in remission stage and control group (P<0.01).The IL-4 and IL-13 mRNA levels of asthmatic children in attack stage were significantly higher than those in remission stage and control group (P<0.01).There was no significant difference of miR-98,IL-4 and IL-13 mRNA between asthmatic children in remission stage and the controls (P>0.05).Furthermore,a negative correlation was found between the expression of miR-98 and IL-5(r=-0.794,P<0.01) and between the expression of miR-98 and IL-13 mRNA (r=-0.804,P<0.01) in asthmatic children in attack stage.A positive correlation was also found between IL-4 and IL-13 mRNA in asthmatic children in attack stage (r=0.853,P<0.01).Conclusion The expression of miR-98 decreased in asthmatic children,and miR-98 might be involved in the pathogenesis and development of asthma.