BACKGROUND: Maintenance and activation of cascade reaction influence T cell proliferation or transformation into nonreactive state even apoptosis. B7 binding to CD28 effectively activates T cells in combination with T cell receptor pathway, and enhances T cell proliferative activity. OBJECTIVE: To investigate the costimulated activation of peripheral blood mononuclear cells (PBMC) with CD28 and CpG containing oligodeoxynucleotides (CpGODN) MoAb combined with CD80, and its killing effect on human gastric cancerous cell line MKN45 in vitro.METHODS: PBMCs were isolated by Ficoll density gradient centrifugation method, and cocultured with interleukin-2, CD28 and CpGODN MoAb for 1-5 days. MKN45 cells were divided into 4 culture conditions: CD28/CpGODN, CD80 plus CD28/CpG ODN, CD80 alone, and blank control.The killing efficiency was measured by MTT method.The ultramicrostructure of cells was observed by electron microscope. Apoptosis was verified by a flow cytometery. RESULTS AND CONCLUSION: CD80 alone did not display killing effect on MKN45 cells. By MTT method, combination of costimulated activation of PBMC with CD28/CpGODN and CD80 showed enhanced killing effect compared with single therapy (P < 0.05), and the ratio of effector cell and target cell at 15: 1 resulted in half killing efficiency. Electron microscope and flow cytometery verified necrotic or apoptotic cells after 24 hours exposure to costimulated activation. Compared with blank control group, CD80 alone elevated the apoptosis rate of MKN45 cells (P < 0.01). Results from the present study show that CD80 can elevate the killing effect of costimulated activation of PBMC with CD28/CpGODN on MKN45 cells in vitro.

Objective To investigate the effect of sedation on respiratory mechanic dynamics, intrapulmonary shunt fraction,oxygen metabolism in patients with mechanical ventilation.Method Sixty patients with mechanical ventilation were divided randomly into control group and sedation group.Propofal was administered to patients,whose ramsay scores were kept atⅢorⅣlevels,in sedation group while the equal amount of normal saline was given in control group.Mixed venous blood and arterial blood samples were taken for blood gas analysis in both groups before and at 2 hours after administration.Heart rate,blood pressure,breathing rate and airway resistance all were recorded at the same time.Results There were no significant differences in oxygenation index,blood pressure,blood lactic acid,total lung static compliance and intrapulmonary shunt fraction between two groups before and after administration.Heart rate,respiratory rate,oxygen uptake and airway resistance of patients in sedation group were lower than those in control group,and partial pressure of oxygen in mixed venous blood of patients in sedation group were higher than those in control group.These differences were statistically significant.Conclusions Sedation can decrease oxygen uptake and airway resistance of patients with mechanical ventilation.However,no alteration in the oxygenation index,total lung static compliance and intrapulmonic shunt ratio can be observed.

Objectives To optimize the curriculum for better education quality. Methods By literature review, the curriculum of the bio-medical English program of Peking University was summa-rized. Interviews were conducted on 8 sophomores of the program based on convenience sampling for their concerns over the curriculum and a questionnalre was designed based on such concerns. Ques-tionnalre survey was used for the remarks and suggestions of the 129 graduates of year 2002, 2003 and 2004 on the curriculum, with 79 valid questionnalres collected and the data analyzed by Microsoft Excel. Results Respectively 64 (81.02%), 52 (65.82%), 53 (67.09%) respondents believe the se-quence, duration and connection of the English courses are appropriate and 65 (82.27%), 46 (58.22%), 50 (63.29%) respondents believe the sequence, duration and connection of the medical courses are appropriate. 63 (81.77%) respondents hoped that they could do experiments in the medical courses, but 18 of them (23.08%) worried that the experiments would make the curriculum more tense. 71 (89.97%) respondents thought that the internship at hospital in the curriculum was conducive to better understanding of medical course contents . Suggestions on the improvement of the curriculum were also made by respondents. Conclusions The curriculum could be further optimized, especially on the connection between different courses, although most of the respondents by and large believe that the curriculum of the program is rational and hold positive attitude towards the internship in hospital and experiments in the curriculum.

Objective To evaluate the role of TCD examination in diagnosis of the early cerebrovascular diseases in aged diabetic patients.Methods 179 cases of aged type Ⅱ diabetic patients were divided into three groups(PDR,BDR and NDB)according to their retinopathy.TCD and retina examination were performed in all patients and the data be analysed. Results (1)The systolic peak flow velocity(Vp) of MCA、ACA、ICA and BA were significant increased in diabetic pa- tients than in normal control group(P

Adolescent ; Adult ; Allyl Compounds ; poisoning ; Chronic Disease ; Female ; Humans ; Occupational Diseases ; diagnosis ; therapy ; Poisoning ; diagnosis ; therapy

ObjectiveTo observe the clinical effect of compositive treatment on cerebral palsy children with rapid acupoint acupuncture at passive position.Methods37 children were treated with compositive treatment including acupoint acupuncture and physical training.Other 21 who treated with medicine were included as control.Results3 cases were cured and 33 cases were markedly effective in treatment group,which was better than that of control(P<0.05).ConclusionThe therapy composed of rapid acupoint acupuncture and physical training can significantly improve the function of children with cerebral palsy.

To investigate the therapeutic effects and associated complications of allogeneic peripheral blood stem cell transplantation (allo-PBSCT). 40 patients with various malignant hematopoietic diseases received allo-PBSCT. The preparative regimens were based on BUCY2 or modified BUCY2. The acute graft-versus host disease (aGVHD) was prevented by cyclosporin A and short-term MTX regimen in all patients. Two patients from donors with one fully mismatched HLA on DRB1 locus and 4 from unrelated donor also administered Zenapox (CD25 MAb) at dosage of 1 mg/kg every day on the day before transplantation and day 4 after transplantation. These 6 patients were also treated with mycophenolate mofetil (MMF). Transfusion of the donor cells: The median of the transfused nucleated cells was 5.38 x 10(8)/kg and that of the CD34+ cells was 7.8 x 10(6)/kg respectively. All the patients gained hematopoietic reconstruction except one who died of infection before engraftment. Seven patients got II degrees-IV degrees aGVHI) and the incidence was 17.5%. Fourteen patients got cGVHD and the incidence was 53.8% in the patients who survived over 6 months. Twenty-eight patients had fever or other characteristics of infection. The median follow-up time was 13.8 months. The incidence of transplantation related mortality (TRM) was 17.5% and 2 patients relapsed (5.0%). It was concluded that allo-PBSCT can reconstruct hematopoiesis quickly and is a favorable therapeutic method for leukemia.
China/epidemiology ; Cyclosporine/*therapeutic use ; Follow-Up Studies ; Graft vs Host Disease/*prevention & control ; Leukemia/*therapy ; Leukemia, Lymphoid/therapy ; Leukemia, Myeloid, Acute/therapy ; *Peripheral Blood Stem Cell Transplantation/adverse effects ; Sepsis/epidemiology ; Sepsis/etiology

Background:The symptomatic bradyarrhythmia is Class Ⅰ indication for pacing therapy which is not a radical cure.The present study aimed to assess the feasibility and to present the initial results of the restricted ablation of the parasympathetic innervation surrounding sinus and atrioventricular (AV) nodes for treating patients with bradyarrhythmia.Methods:A total of 13 patients with cardiogenic syncope were included from May 2008 to June 2015.Under the guidance of fluoroscopy and/or three-dimensional geometry by 64-slice spiral computed tomography,atrial activation sequence in sinus rhythm was mapped.Chamber geometry was reconstructed manually or automatically using the Niobe Ⅱ magnetic navigation system integrated with the CARTO-remote magnetic technology (RMT) system.Cardioneuroablation was targeted at the high-amplitude fractionated electrograms surrounding the regions of His bundle and the site with the earliest activation in sinus rhythm.Areas surrounding the sinus node,AV node,and the phrenic nerve were avoided.Results:Thirteen patients completed the studies.Ablation was successfully performed in 12 patients and failed in one.The high-frequency potential was recorded in atrial electrograms surrounding the sinus or AV nodes in all the patients and disappeared in 15 s after radiofrequency applications.The vagal reaction was observed before the improvement of the sinus and AV node function.No complications occurred during the procedures.Patients were followed up for a mean of 13.0 ± 5.9 months.During the follow up ten patients remained free of symptoms,and two patients had a permanent cardiac pacemaker implanted due to spontaneous recurrence of syncope.The heart rate of post-ablation was higher than pre-ablation (69.0 ± 11.0 vs.49.0 ± 10.0 beats/min,t =4.56,P =0.008).The sinus node recovery time,Wenckebach block point,and atrium-His bundle interval were significantly shorter after ablation (1386.0±165.0 vs.921.0 ±64.0ms,t=7.45,P=0.002;590.0±96.0 vs.464.0± 39.0ms,t=2.38,P=0.023;106.0±5.0 vs.90.0 ± 12.0 ms,t =9.80,P =0.013 before and after ablation procedure,respectively).Conclusions:Ablation of sinoatrial and AV nodal peripheral fibrillar myocardium electrical activity might provide a new treatment to ameliorate paroxysmal sinus node dysfunction,high degree AV block,and vagal-mediated syncope.

Aneurysm ; complications ; therapy ; Cardiac Catheterization ; instrumentation ; Child ; Heart Septal Defects, Ventricular ; complications ; therapy ; Humans ; Septal Occluder Device

Objective To evaluate the CT findings and classification of the Le Fort fracture. Methods Sixty-two cases with Le Fort fractures were studied with thin-slice high-resolution CT scanning and analyzed with three-dimensional(3D)imaging reconstruction.Results Of the 62 patients,10 had Le Fort type Ⅰ fracture,9 had Le Fort type Ⅱ fracture,8 had Le Fort type Ⅲ fracture,and 35 had various combinations of the three types of Le Fort fractures,including 18 Le Fort Ⅰ+Ⅱ fracture,7 Le Fort Ⅰ+ Ⅱ+Ⅲ fracture and 10 Le Fort Ⅱ+Ⅲ fracture.Fifty-five cases had associated multiple fractures in the maxillofacial region.On 2D CT images,Le Fort fracture manifested as multiple and complex fractures. Though 2D image was better than 3D image in accurately defining tiny fractures and fractures of deep structures,the diagnosis of Le Fort fracture could not be correctly made solely on 2D image.3D CT clearly and stereoscopically demonstrated the entire shape and orientation of Le Fort fracture,thus facilitating the correct classification of Le Fort fracture.Conclusion 3D CT image is important in providing information about the space relationship of Le Fort fracture,thus very valuable for the preoperative planning.