Objective To study the impact of viral infection on stress protein gene expression and investigate the possibility that heat shock proteins interact with viral components during viral assembly in the brain of suckling mice experimentally infected with Hantaan virus (HV). Methods New born mice less than 72 h of age were inoculated into brain with the 100 LD50 of Hantaan virus (strain 76 118). At the 8th day mice died from brain disease. Brains were prepared for tissue sections and extracts for the experiments. The Hantaan virus infection, HSP70 induction and their co localization in brain of infected suckling mice were demonstrated by immunohistochemical staining and laser scan co focal microscopic double labling. The possible intereaction between HV structural proteins and HSP70 was further analyzed by immunoprecipitation of infected tissue extracts with antibodies to either HSP70 or to viral nuclear capsule proteins HV NP by using SDS PAGE and Western blotting. Results HV infection induced an increased levels of HSP70 expression at the cytoplasma of neurons in the brain of suckling mice HV NP protein proved to be co localized with HSP70. Monoclonal antibody (mAb) to HSP70 could co immunoprecipitate the HV NP, and similarly mAb to HV NP could co immunoprecipitate HSP70 from virus infected tissue extracts, but not from mock infected tissue extracts. Antibody, which recognized one of these two proteins, did not cross react with the other. Thus, the association between HSP70 and HV NP appeared to be specific.Conclusions Hantavirus infection can directly induce HSP70 expression, leading to the formation of HV HSP 70 viral antigen peptide complex which plays some roles in the course of viral infection and replication.

Objective To test and evaluate the lung function of patients with inflammatory bowel disease (IBD),and to explore the correlation and characteristics between IBD and abnormal lung function.Methods From January 2012 to June 2013,74 hospitalized patients with IBD were collected,among them 34 cases were ulcerative colitis (UC) and 40 cases were Crohn's disease (CD).At the same period,74 healthy individuals were enrolled as controls.The database of history was established.The general state,chemical examinations,lung function,chest X-ray,the diagnosis and treatment were statistically analyzed separately.T test was performed for comparison between groups of measurement data,chi square test was for comparison between groups of count data,rank-sum test was for comparison between groups of ordinal data,and Logistic regression was for multivariate analysis.Results Among the 74 patients with IBD,56 patients (75.68％) were found with abnormal lung function.The percentage of abnormal residual volume of IBD and CD group was 51.35％(38/74) and 60.00％(24/40),which were higher than that of control group [31.08％ (23/74)] and the differences were statistically significant (t=-2.557,P=0.013; t=2.236,P=0.031).There were no significant difference between UC and CD group (P＞0.05).There was no significant correlation between abnormal pulmonary function and the severity of IBD (F=0.744,P=0.690) or extent of lesion (F-2.796,P=0.424).The course of disease ≥five years was a possible protecitive actor (OR=0.824,95％CI:0.687-0.987),and elevated erythrocyte sedimentation rate (ESR) was a possible risk factor (OR=1.093,95％CI:0.994-1.202).Conclusions Most IBD patients are complicated with impaired lung function.It might occur regardless of severity or extent of disease.Course of the disease and ESR may he the influence factors in abnormal lung function.

The retrieval of literature novelty assessment projects was divided into unlimited retrieval and limited retrieval according to the retrieval terms.The redundant retrieval mode,complicated retrieval process,poor compatibility,and lack of summary that affect the retrieval effectiveness of literature novelty assessors were analyzed.The overall retrieval ability and literature analysis ability of literature novelty assessors were put forward for improving their retrieval effectiveness.

Objective To establish a cell level-based negative enrichmen technique to detect circulating tumor cells (CTCs) in the peripheral blood of patients with epithelial ovarian cancer.Methods The colon cancer SKOV-3 cells were mixed with 2 ml whole blood from healthy donors at different ratio.Quantification of CTCs was performed using immunomagnetic bead based negative enrichment combined with immunofluorescence antibody method.The method was evaluated the recovery rate of target cells,Samples of 32 patients with ovarian cancer and 10 controls were assayed for CTCs detection by above method.Results ①The recovery rate was ranging from 64％ ～80％ by spiking varying numbers of SKOV-3 into 2 ml blood samples of healthy volunteers.Regression analysis of number of recovered SKOV-3 cells yielded a regression equation of Y=0.782X-1.408 and a coefficient of determination of R2 =0.998.②Did not detect CK8/18-+ circulating tumor cells in 10 controls,and CK8/18+ circulating tumor cells in 18 cases of 32 Patients with ovarian cancer.The positive rate of CK 8/18 + circulating tumor cells was significantly differences between the two groups (x2 =7.681,P＜0.01).③The presence ofCTCs was significantly correlated with distant metastasis (x2 =5.776,P＜0.05).Conclusion The method of immunomagnetic bead based negative enrichment combined with immunofluorescence antibody technique for CTCs detection in peripheral blood of patients with ovarian cancer has a clinical value of application and extension.

Objective To observe and compare the functional outcomes of early rehabilitation of persons who received primary bilateral or unilateral total knee arthroplasty (TKA).Methods Sixty-eight subjects were divided into a unilateral TKA group (36 cases) and a bilateral TKA group (32cases).All received the same professional rehabilitation program during an average postoperative hospital stay of (15.00 ± 3.71 ) days.At discharge,a visual analogue scale (VAS) was used to rate pain.Active range of motion (AROM) of the involved knee,knee injury and an osteoarthritis outcome score (KOOS) were also assessed.The KOOS and knee society score (KSS) were evaluated at follow-up about 11 months later.Results There was no significant difference between the two groups in any assessment at discharge,nor in the KOOS and KSS-Ⅰ assessments at follow-up.The KOOS of both groups at follow-up had improved significantly compared with that at discharge.The KSS-Ⅱ results in the bilateral group were slightly better than those in the unilateral group at follow-up,and that difference was significant.Conclusions Bilateral TKA patients and unilateral TKA patients had the same clinical outcomes after early postoperative rehabilitation,but the functional outcomes of bilateral TKA patients were better than those of unilateral TKA patients a year later.

Objective To build three-dimensional (3-D) finite element models for local advancement skin flap, by which the post-operative local strain and local stress of skin were figured out to assist in the design of skin flap in clinic. Methods The biomechanical parameters of human forehead skin were obtained in vitro from biomechanical experiments. The 3-D finite element model of local advancement skin flap was set up by MSC Marc/Mentat 2005 (3-D finite element software). Six models were built with the same flap but different skin defects, to simulate post-operative local strain of skin and local stress of skin in different models. Results Post-operative local stress of skin increased with the skin flaps stretching, but the relationship between increase and stretching did not meet the linear rule. Skin flap was able to stretch to 40 % of its initial length in theory if we did not consider blood supply of it. When the skin flap stretched over 40 % of its initial length, the maximal stress could exceed the yield limit. Conclusion It is an effective and workable way to simulate local advancement skin flap using 3-Dfinite element model and biomechanical parameters of human skin. The stretch ratio of local advancement skin flap should be not over 40% for safety.

Background There remains some controversy over whether polypoidal choroidal vasculopathy (PCV) represents a subtype of neovascular age-related macular degeneration (nAMD).Anti-vascular endothelial growth factor (VEGF) therapies are important in the treatment of PCV and nAMD.It has been identified that VEGF-A was differentially spliced from exons 8 and formed two isoforms families:the pro-angiogenic VEGFxxx family and the anti-angiogenic VEGFxxxb family.However,the role of the two VEGF families in PCV and nAMD was still unclear.Objective This study was to measure the contents of pro-angiogenic VEGFxxx family and the anti-angiogenic VEGFxxxb family in aqueous humor of nAMD and PCV patients and explore their effect on nAMD and PCV.Methods Thirty-four nAMD patients and 26 PCV patients were enrolled in Peking University People's Hospital during March to December,2013,and 16 age-related cataract patients served as controls.The aqueous humor samples 0.1 ml was collected before the introvitreous injection of anti-VEGF drug.The contents of pro-angiogenic VEGFxxx family and the anti-angiogenic VEGFxxx b family in the aqueous humor were measured by enzyme-linked immunosorbent assay(ELISA).Results The concentrations of VEGF in the aqueous humor in the nAMD group,PCV group and control group were (4 210.00±998.40),(387.00±51.31) and (377.40 ±69.97)pg/ml,respectively,showing a significant difference among the three groups (F =12.851,P =0.000).The concentrations of VEGF165 b in the aqueous humor in the nAMD group,PCV group and control group were (205.50±12.59),(159.40±16.25) and (347.90±29.18) pg/ml,with a significant difference among them (F=23.752,P=0.000).Compared with the control group,VEGF content in the aqueous humor was elevated and the VEGF165b content was declined in the nAMD group,and VEGF165b was lowed in the PCV group,with significant differences between them(all at P=0.000).However,no significant difference was seen in the change of VEGF between the PCV group and the control group (P=0.992).The VEGF content in the aqueous humor was higher in the nAMD group than that in the PCV group (P =0.001),but VEGF165b content was insignificantly different (P =0.097).Conclusions The downregulation of VEGFxxx b may be associated with nAMD and PCV.The different role of VEGFxxx b in the development of PCV and nAMD needs to be verified in further studies.

Objective To explore the rules of the compatible application of antagonistic combination Ginger and Radix Scutellariae in clinical.Methods The prescriptions included the compatibility application of Ginger and Radix Scutellariae were systematically retrieved in literature. Using Excellas a storage and analysis tool, the information about treatments, dosage, compatibility proportion, and dosage form were analyzed with the method of bibliometrics.Results The prescriptions included the compatibility application of “Ginger and Radix Scutellariae” were mainly used for the treatment of internal diseases (746 cases, 76%), followed by gynecological diseases (62 cases, 6%), ear-nose-throat diseases (43 cases, 4%), etc. The largest number of internal diseases was spleen-stomach diseases, which accounted for 26% (193 cases) of the total internal diseases. And the others were diseases of liver-gallbladder 189 cases (25%), and diseases of lung (185 cases, 25%). In the prescriptions, the dosages of Radix Scutellariae were primarily 10, 12, 9, 15 g, 69% (532/772) of which were in the dose range provided by Chinese Pharmacopoeia. The dosages of Ginger were mainly 10 g and 6 g, 84% (356/424) of which were in the dose range provided by Chinese Pharmacopoeia. The compatibility proportion of Ginger and Radix Scutellariae was mostly 1∶1, which accounted for 32%.Conclusion The antagonistic combination Ginger and Radix Scutellariae was widely used in a variety of interior, exterior, gynaecology, paediatrics and other syndromes. The two drugs were contrary in the property (one cold and the other hot) and the function (one warming lung and the other clearing away the lung-heat), but their compatibility application can achieve a satisfactory efficacy.

Objective To explore the predictive value of serum CEA and cytokeratin-19 fragments (CYFRA21-1)prior treatment for the epidermal growth factor receptor (EGFR) mutation and efficacy of tyrosine kinase inhibitors ( TKI ) in patients with non-small cell lung cancer.Methods The study was a clinical research.Totally 101 matched tissue and plasma samples were collected from Peking University People′s Hospital from 2012 to 2013.All clinical specimens were analyzed for EGFR mutations in exons of 18, 19, 20 and 21 by ADx-ARMS and direct sequencing, and the serum levels of CEA and CYFRA21-1 were analyzed by ECLI.The correlation between EGFR mutant status and efficacy of EGFR-TKI and clinicopathological parameters were analyzed by χ2 test, Log-rank text and Cox proportional hazards regression model.Results The mutation rate was 60.4%(61/101) by ADx-ARMS and 33.7%(34/101) by direct sequencing.Mutations were more frequently observed in the higher serum CEA level patients(≥5μg/L,78.8%).However, the rates of EGFR mutations of different CEA levels were similar.Among the patients receiving TKI therapy, the efficacy of EGFR-TKI was closely related to serum CYFRA21-1 level prior treatment and EGFR mutation (χ2 =8.903, P =0.003; χ2 =28.590, P <0.001 ).And serum CYFRA21-1 level prior treatment and EGFR mutation were independent factors for EGFR-TKI treatment affecting PFS (RR=0.298, P<0.001;RR=0.086, P<0.001).Conclusion The mutation rate of EGFR was significantly related with the expression level of CEA prior treatment, and serum CEA and CYFRA21-1 levels prior treatment could be potential predictors of EGFR-TKI efficacy.

Objective To estimate the diagnostic vaule of circulating tumor cells (CTCs) detection for epithelial ovarian cancer,and investigate the relationship between the presence of CTCs and the clinic pathologic characteristics of epithelial ovarian cancer patients.Methods Quantification of CTCs were performed using immunomagnetic bead based negative enrichment combined with flow cytometry in 65 patients with epithelial ovarian cancer,21 patients with benign ovarian diseases,and 10 healthy subjects.The differences among groups were analyzed by the Kruskal-Wallis H test (multi group comparison) and the Mann-Whitney U test (two group comparison),and the chi-square test was used in the positive rate comparison,the receiver operating characteristic (ROC) curve was established.The relationship between CTCs and clinic pathologic characteristics of epithelial ovarian cancer patients were analyzed.Results The receiver operating characteristic analysis showed the cut off value was 4.5 (＞ 4),the AUC was 0.806,and sensitivity,specificity and positive value (PPV) were 55.4 ％,96.8 ％ and 97.3 ％ respectively,in detecting patients with ovarian carcinoma malignancy.Quantification of CTCs in epithelial ovarian cancer was correlated with FIGO stages or distance metastasis (all P＜0.05),but not with patient age,histological types,pathologic differentiation,amount of ascites,tumor size and lymph node metastasis (all P＞0.05).Conclusion The detection of peripheral CTCs has a certain diagnosis value in epithelial ovarian cancer,especially with related to FIGO stages and distant metastasis.