Objective To prepare the recombinant epitopes of HSV-gB and HSV-gD protein and provides a new antigen protein for the development of herpes simplex virus(HSV)vaccine.Methods The epitopes of HSV-gB and HSV-gD protein were analyzed by epitope prediction software.A novel gene named X which encoded 9 predicted epitopes of HSV-Gb and HSV-gD protein was designed and synthesized using chemical method.X gene was cloned into vector PET-28a(+),expressed in Escherichia cob' BL21(DE3),and analyzed by Western blot.Results X gene was successfully designed and expressed in Escherichia coli BL21(DE3).Western blot analysis showed that recombinant X protein,which was with His marker,can be detected by anti-His antibody.Conclusion In this study we establish a newmethod to express recombinant epitope protein,which may be a new protein for developing vaccine against HSV infection.

Training pathologist's ability of rapid intraoperative diagnosis of central nervous system tumors is of great importance to decide ranges of clinical operation and to promote pathological diagnosis level.Pathologist made frozen section,fully understood the clinical data and operation,mastered correct method of slice reading,learned comprehensive analysis,and exercised psychological quality thus to make rapid intraoperative diagnosis correctly.

Objective To observe the effects of S100A4 siRNA on the expression of serum TNF‐α,IL‐1βand VEGF in adjuvant arthritis rats .Methods Adjuvant arthritis rat models were established and were randomly divided into model group and interfere group .On Day 11 ,rats in interfere group were injected with S100A4 siRNA fragment in articular cavity .Arthritis index (AI) chan‐ges and pathological changes of ankle joint were observed .The levels of serum TNF‐α and IL‐1β ,VEGF were detected by ELISA . Results Compared with that of model group ,the levels of serum TNF‐ α ,IL‐1β and VEGF were reduced significantly in interfere group (P< 0 .05) ;variances of AI and pathological scores in interfere group were diminished significantly (P< 0 .05) .Conclusion Inhibition of the expression of S100A4 gene can significantly reduce the expression of inflammatory factor TNF‐α ,IL‐1 β and angio‐genesis factor VEGF ,and improve the pathological injury of synovial membrane .

Objective To investigate the gene sequence and mutations of human papillomavirus(HPV)type16E6E7in patients with HPV infection in Beijing.Methods Sample DNA was extracted from lesions in patients with HPV infection.HPV types were identified by polymerase chain reaction(PCR).E6E7gene,isolated from samples infected with HPV16only,was cloned into plasmid pGEM-3zf and sequenced.Results The recombinant plasmid pGEM/16E6E7was constructed successfully.The whole HPV E6E7gene was776bp in length which was equal to that of the standard strain.Three nucleotides exchanges,i.e.,p60PROE6,p96GLUE6,p565SERE7,were found in E6E7gene.Conclusion The data suggest that there are nucleotide differences of HPV E6E7gene between HPV obtained from Beijing and that of standard sequence.

Purpose To study the clinicopathological features of extraventricular neurocytoma. Methods 12 cases of extraventricular neurocytoma were retrospectively analyzed for their clinical information and histopathological features. Results The distribution of ex-traventricular neurocytoma was as follows: cerebral hemisphere (5 cases), right thalamus (2 cases), cerebellar vermis (2 cases), saddle area (2 cases), and spinal cord (1 case). The histological features were round uniform cells, round or oval nuclei, with peri-nuclear clearing commonly seen. Neuropil-like structure, ganglion cells or ganglion-like cells, perivascular rosettes, calcification, cap-illary wall thickening and hyaline degeneration and other pathological changes were also observed. All cases showed strong immunoreac-tivity for Syn. 7 cases exhibited Ki-67 labeling index of≤2%, and other 5 cases showed 3% ~8%. 3 cases were performed with fluo-rescence in situ hybridization ( FISH) to detect loss of chromosome 1p/19q, but no loss was detected. Postoperative follow-up for 4 months to 4 years showed one case had tumor recurrence and intracranial spread in postoperative 2 years. Conclusions Extraventricu-lar neurocytoma shares similar histological features with central neurocytoma, but often more complex. Ganglion cells or ganglion-like cells, calcification, capillary wall thickening and hyaline degeneration are more frequently seen, but neuropil-like structure is less seen. Extraventricular neurocytoma needs differential diagnoses from oligodendroglioma, ependymoma, dysembryoplastic neuroepitheli-al tumor and others. Immunohistochemistry and chromosome 1p/19q loss can help in the differential diagnosis. The treatment for ex-traventricular neurocytoma is grossly total resection, with post-operative radiotherapy for subtotal resection, atypical or recurrent cases.

BACKGROUND:To dynamicaly monitor the varying levels of inflammatory factors in the gingival crevicular fluid is helpful to assess the early effect of orthodontic tooth movement. Myeloperoxidase, soluble intercelular adhesion molecule-1, pentraxin 3 are proven to be closely related to inflammation, but it is unclear about the levels of these three kinds of inflammatory factors as wel as association of these three kinds of inflammatory factors with orthodontic tooth. OBJECTIVE:To detect the expression levels of myeloperoxidase, soluble intercelular adhesion molecule-1 and pentraxin-3 in the gingival crevicular fluid during maxilary canine distal movement and to assess their correlation with periodontal disease, canine movement distance and orthodontic force. METHODS:Twenty-one orthodontic patients were enroled and assigned into 150 g (n=12) or 100 g (n=9) groups according to orthodontic force. The gingival crevicular fluid samples of orthodontic patients were colected before and at 4, 12, 24 hours, 7, 14 days after maxilary canine distal movement. Levels of myeloperoxidase, soluble intercelular adhesion molecule-1 and pentraxin-3 in the gingival crevicular fluid were measured and analyzed using ELISA assay. RESULTS AND CONCLUSION: During the distal movement of maxilary canine, under orthodontic force, the level of myeloperoxidase was peaked at 4 hours and then decreased, while the expression level of soluble intercelular adhesion molecule-1 was peaked at 12 hours, and then decreased. Both myeloperoxidase and soluble intercelular adhesion molecule-1 levels returned to normal at 7 days under orthodontic force. The expression level of pentraxin-3 was increased significantly under orthodontic force, peaked at 24 hours, and then decreased gradualy to the normal level at 7 days. In addition, the expression levels of myeloperoxidase, soluble intercelular adhesion molecule-1 and pentraxin-3 in the gingival crevicular fluid were significantly higher under 150 g force than under 100 g force. These findings indicate that detecting varying levels of myeloperoxidase, soluble intercelular adhesion molecule-1 and pentraxin-3 in the gingival crevicular fluid is useful to assess the efficiency of orthodontic treatment and prevent adverse reactions.

Objective To compare the clinical values of impedance method,optical method and microscopy when used to detect platelet abnormal results.Methods Platelet re-examinations by optical method and microscopy were carried out in case of low confidence degree in platelet test with impedance method by XE-2100 automatic hematology analyzer,and then the results by the three methods were compared.Results Most of the low-confidence-degree results by impedance method could be corrected by re-examination by optical method,and the remained had to turn to microscopy due to unsatisfied requirements of the instrument.Conclusion Optical method has to be involved to correct the platelet abnormal results by XE2100 automatic hematology analyzer,and microscopy should be applied in case optical method doesn't work.The three methods gains advantages and disadvantages of themselves,and can be supplementaries for one another.

Objective To study the expressions of co stimulatory factors CD28 and CTLA 4 on CD3 + T cells in peripheral blood lymphocytes (PBMC) and synovial fluid lymphocytes (SFMC) in patients with rheumatoid arthritis (RA) and the relationship of these molecules with the activity of RA. Methods The lymphocytes were collected from the peripheral blood and synovial fluid in RA patients. The CD3 +CD28 + and CD3 +CTLA 4 + molecules on these cells were measured by dual color fluorescence cytometry. The correlation of the expressions of CD3+CD28+ and CD3 +CTLA 4 + molecules with the activity of RA was statistically analyzed by Spearman. Results ① The level of CD3 +CD28 + in PBMC of RA patients was significantly lower than that of the control group and SFMC ( P

Objective To investigate the correlation of the expressions of P170,topoisomerase Ⅱ(TOPⅡ)and the proliferation in gliomas.Methods Ki-67 was used as the marker of the proliferation in gliomas.The expressions of P170,TOPⅡ and Ki-67 were tested by S-P immunohistochemical technique using monoclonal antibody to their protein in 54 cases of low-grade gliomas(WHO Ⅰ～Ⅱ grade)and 54 cases of high-grade gliomas(WHO Ⅲ～Ⅳ grade),analysis of the clinical and follow-up were performed.Results The expressions of P170,TOPⅡ and Ki-67 had significant differences between low-grade and high-grade gliomas(P<0.01).Correlation analysis showed that the expression of P170 was negatively related with Ki-67(r=-0.276,P=0.019);the expression of TOPⅡ was positively related with Ki-67(r= 0.637,P<0.001);there was no correlation between the expressions of P170 and TOPⅡ.Conclusion The expressions of P170 and TOPⅡ are associated with the malignant prognosis in gliomas.

Objective To investigate the outcome of high-risk acute non-lymphocytic leukemia treated with sequential low-dose cytarabine and harringtonine(LD-HA) and standard induction. Methods 50 high-risk ANLL. patients (LD-HA group) who were regarded as unfit for intensive chemotherapy were chosen to receive LD-HA. Reinductive treatments with standard regimens would be given for those who did not achieve complete remission. 23 patients DA/HA group given two cycles of standard inductive regimens were taken as the control. Results In LD-HA group 80.0 %. (40/50) reached CR, 2 patients died shortly after inductive therapy. The median leukemia-free survival(LFS) was 19.6 months, and the median overall survival (OS) was 12.2 months. Overall survival was 57.0 % at 1 year, 24.1% at 3 years, and 18.8 % at 5 years. While the CR rate was 73.9 % for DA/HA group, and none died during the inductive therapy. LFS and OS was 19.8 months and 12.1 months, respectively. OS rate was 56.58 % at 1 year, 27.1% at 3 years, and 27.1% at 5 years.There were no difference on OS rates between 2 groups (x2 were 0.009, 0.237 and 1.807, respectively,P ＞0.05). Conclusion In patients who were unfit for intensive chemotherapy, sequential therapy with LD-HA and standard induction improved the rate of complete remission and the duration of survival.