Objective To study whether the HBC-A2/scFv fusion protein mediates killing of tumor cells by viral specific cytotoxic T cells. Methods The fusion protein was attached to the CD71-expressing, HLA class Ⅰ negative tumor cells. And then, cytolysis by viral peptide-specific CTLs which were generated by co-culture of peripheral blood lymphocytes from HLA-A2 positive donors with inactivated T2 cells pulsed with the viral peptide were tested by lactate dehydrogenase (LDH) releasing. Results The fusion protein can attach the active viral peptide/HLA-A2 complex to K562, HepG2 and U937 cells through binding of CD71 scFv to CD71 (37.30% ±8.25%, 27.20% ±3.88%, 21.80% ±6.49% ) and mediate cytotoxicity of viral peptide-specific CTLs against those cells in vitro ( K562: 42.08% ± 1.14% vs 8.07%± 1.39%; HepG2: 49.72% ± 1.59% vs 12.46% ± 1.26%; U937: 39.72% ± 3.26% vs 7.13% ±1.48% ). Conclusion This viral peptide/HLA-A2 complex targeted by CD71 scFv is able to redirect viral peptide-specific T-cell mediated immune responses against tumor cells.

Objective To study CT findings of solitary inflammatory lung lesion,and improve CT diagnostic accuracy.Methods In 21 cases with solitary inflammatory lung lesion,four cases were treated with surgery,four cases were punctured with CT guided biopsy,and other cases were treated with anti-inflammatory agents under being followed up with CT.All were scanned with 2～5 mm thin slice.Results ①The lesions showed square,triangle and irregularity (13 cases).②Part of margin blurred(12 cases).③The density at the edge of the mass was lower than at the central area(9 cases).④After anti-inflammatory therapy,most lesions gradually reduced in size(11 cases).Conclusion Anlysizing CT findings helps to diagnose solitary inflammatory lung lesion,and improves diagnostic accuracy through puncturing with CT guided biopsy necessitiously.To the basic hospital,to scan with 2～5 mm thin slice is important especially.

Objective To study the platelet antibody screening and crossing match by surface plasmon resonance(SPR) ,and to find a new way for platelet compatibility testing .Methods The corresponding universal platelet antigen was fixed on the SPR chip surface by the amino coupling method .Platelet antibody positive and negative control serum were analysed by SPR micro-ar-ray ,the stability ,sensitivity and specificity of this technique were discussed ,and compared with MAIPA assay .Finally we used the SPR technology to cross match for ten cases of the platelet antibody positive patients before infusion ,and to evaluate the effect of platelet infusion .Results For the SPR technology ,the stability ,sensitivity and specificity of platelet antibody detection were all better ,106 cases of the repeated platelet transfusion samples were tested by SPR assay and MAIPA method ,there was no signifi-cant difference between them(chi-square=0 .333 ,P>0 .05) ,the total consistency was 97 .2% .The 10 cases of platelet antibody positive patients were crossed match before platelet transfusion by SPR technology ,the good results of 8 cases of them were found by the clinical tracking evaluation ,1 h CCI>7 .5 ,24 h CCI>4 .5 .Conclusion SPR technology for screening platelet antibody mat-ches with MAIPA method in basic quality ,but SPR assay is simple ,rapid ,reliable and intuitive ,label free ,which can satisfy the re-quirements for clinical rapid detection of platelet antibody screening and crossing match .

Objective To observe whether appropriate intermittent exercise at the ischemic threshold can safely promote collateral circulation in an ischemic area of the myocardium through the increased expression of vascular endothelial growth factor(VEGF)and its receptor fetal liver kinase-1(Fik-1). Methods A balloon constrictor was surgically implanted in the first obtuse marginal coronary artery(OM1)of miniature pigs.The subjects were divided into 3 groups:a sham-operation group,a pure ischemia group,and an exercise training group.Subjects in the exercise training group performed individualized treadmill programs 30 min daily,5 d per week,for 8 weeks,including 2 two-minute episodes of exercise-induced ischemia.Two pre-exercise episodes of pure ischemia induced by brief OM1 occlusion were also conducted.Only pure ischemia was induced in the pure ischemia group,and the sham-operation group remained sedentary for the experimental period.Relative myocardial blood flow(RMBF)was measured using microspheres.VEGF and Flk-1 expression levels were measured by Western blotting and real time RT-PCR analyses.Cardiac troponin I(ctnI)levels were determined using an enzyme-linked immunosorbent assay(ELISA). Light and electron microscopy were employed to examine myocardia damage in the ischemic area.Results RMBFs in the exercise training group were significantly higher than those in the pure ischemia and sham-operation groups. RMBFs in the pure ischemia group were significantly higher than those in the sham-operation group.The expression of VEGF and Flk-1 proteins and mRNAs in the exercise training group were significantly higher than those in the pure ischemia and sham-operation groups,and the levels in the pure ischemia group were also significantly higher than those in the sham-operation group.After training,no myocardial damage and no ctnI increase was observed in the pure ischemia group.Microscopy revealed no obvious structural changes. Conclusion Intermittent exercise at the isehemia threshold intension can safely promote coronary collateral formation through upregulation of VEGF and Flk-1 expression in the ischemic myocardial area of a porcine model.

Sugarcane bagasse modified by polyethylenimine (PEI) and glutaraldehyde (GA) was used as a carrier to immobilize Clostridium acetobutylicum XY16 in the process of butanol production. The effects of chemically modified sugarcane bagasse on batch and repeat-batch fermentations were investigated. Batch fermentation was conducted with an addition of 10 g/L modified sugarcane bagasse and 60 g/L glucose, resulting in a high solvent concentration of 21.67 g/L and productivity of 0.60 g/(L x h) with the treatment of 4 g/L PEI and 1 g/L GA. Compared to the fermentations by free cells and immobilized cells on unmodified sugarcane bagasse, the productivity increased 130.8% and 66.7%, respectively. The fibrous-bed bioreactor also maintained a stable butanol production during repeat-batch fermentations, achieving a maximum productivity of 0.83 g/(L x h) with a high yield of 0.42 g/g.
Batch Cell Culture Techniques ; Bioreactors ; Butanols ; metabolism ; Cells, Immobilized ; Cellulose ; metabolism ; Clostridium acetobutylicum ; metabolism ; Fermentation ; Saccharum ; chemistry

National Teaching Contests of young teachers from medical colleges in China has been held for several years. Experiences obtained from participating and observing the contest have shown that the teaching ability and quality of young teachers have been dramatically improved over these years. But there are a few problems worthy of attention. First, up-to-date progress in scientific research should be intro-duced to the class in proper way. Applying the scientific material mechanically or overgeneralizing individual findings should be avoided in this process. Secondly, the teachers should strengthen the cultivation of criti-cal thinking and dialectical way of thinking, to enable students to use critical thinking, the integrated point of view to analyze and solve the problem. Thirdly, teaching should also focus on humanistic education, and through the infiltration of human content in the classroom, imperceptibly affect students. Finally, young teachers can give full play to their advantages of rapid learning and to use internet as a platform for the reform of teaching methods to promote the interaction between teachers and students, enriching their class-room.

OBJECTIVE: To explore the clinical characteristics, diagnosis method and treatment of petrous apex cholesteatoma. METHOD: A retrospective analysis was taken with respects to the clinical characteristics, diagnosis and surgical management of 38 patients who underwent surgery for petrous apex cholesteatoma in our department. RESULT: (1)31 patients had unilateral hearing loss and facial paralysis of different degree, 27 patients were firstly characterized with hearing loss, and followed by facial paralysis. 6 cases had facial paralysis as the main performance. (2)17 patients had syndrome of tinnitus, and 15 patients had syndrome of vertigo and 4 cases of severe pain of ear. (3)All patients had petrous bone destroy with high resolution CT scan, while MRI suggests the presence of pathological changes in petrous apex. (4)All patients were taken surgeries to remove the lesion, and translabyrinth approach was chosen for 23 patients, middle cranial fossa approach is 12, while 3 case has choose endoscopic approach. 8 cases were operated with facial nerve decompression. 7 cases was taken end to end anastomosis. 3 cases of great auricular nerve transplantation. There is no recurrence in follow-up of 1 years to 2 years. CONCLUSION The clinical manifestations of petrous apex cholesteatoma lack specificity, and high resolution CT and MRI has important value in the diagnosis of petrous apex cholesteatoma. The strategy of surgical operation should be taken according to the classification, location of petrous apex cholesteatoma as well as hearing level and facial nerve function with patients.
Cholesteatoma ; pathology ; surgery ; Cranial Fossa, Middle ; Decompression, Surgical ; Facial Nerve ; Facial Paralysis ; Hearing Loss ; Hearing Loss, Unilateral ; Humans ; Magnetic Resonance Imaging ; Petrous Bone ; Recurrence ; Retrospective Studies ; Tomography, X-Ray Computed

The syndrome known as chronic critical illness (CCI) is defined as that critically ill patients survive their initial acute illness but go on to experience persistent organ failures necessitating prolonged intensive care. Intestinal barrier is the physical barrier that separates the internal and external environments and prevents the invasion of pathogenic antigens. Due to its pathogenesis, many CCI patients have injured intestinal barrier. Gut is the motor organ of stress responses, and gut-associated infections may initiate multiple organ dysfunction. In this way, it is important to maintain intestinal barrier of such patients. Apart from treatment for underlying diseases, resuscitation aiming at improving tissue perfusion, appropriate nutritional support, protection of normal intestinal flora, and provision of probiotics can maintain intestinal barrier of CCI patients. The maintenance and support of barrier function requires attention.
Chronic Disease ; Critical Care ; Critical Illness ; Defecation ; Gastrointestinal Diseases ; Humans ; Intestinal Mucosa ; Intestines ; Nutritional Support ; Probiotics

Objective To investigate the effect of the synthetic rehabilitation treatment using the assistive devices for children with cerebral palsy.Methods 60 outpatients (male 31,female 29) diagnosed as cerebral palsy in our hospital from June 2009 to June 2010 were divided into trial group (n =30) and control group (n =30).Both of the two groups received our rehabilitation treatment three times a week.Compared with the daily family rehabilitation training of the control group,trial group still received a daily rehabilitation treatment by their parents using the assistive devices under the guidance of the therapist.They were assessed with Gross Motor Function Measure 66 items version (GMFM-66)and 88 items version (GMFM-88) before and after 6 months treatment.Results The total score of GMFM-66 and each dimension score of GMFM-88 improved in both group after 6 months treatment,except the centrol group Lying & Rolling dimension.Trial group 51 ± 13 vs.44 ± 15,control group 42 ± 17 vs.38 ± 16 (t =-3.580,P =0.001).There was significant difference on the total score of GMFM-66 and the three dimensions score (Lying & Rolling,Sitting and Walking,Running & Jumping) of GMFM-88 between two group.Lying & Rolling:F =4.59,P =0.036; Sitting:F =6.40,P =0.014 ; Walking,Running & Jumping:F =4.35,P =0.041.Conclusion The synthetic rehabilitation treatment in Medical institutions associate with family rehabilitation treatment using the assistive devices can effectively improve the recovery of gross motor function in children with cerebral palsy.

Objective To investigate the treatment of biliary complications in perioperative stage of live transplantation. Methods From January 2007 to December 2009, 23 patients suffered from surgical biliary complications after liver transplantation. The clinical data including the types of biliary leakage,treatment, prognosis were analyzed retrospectively. Results Of 12 biliary leakage patients, 7 were anastomotic leakage, 3 with leakage of bile duct on the cutting surface of the graft of living ralated liver transplation, 1 with cystic duct leakage and 1 with leakage of aberrant biliary duct. Of 11 biliary stricture patients, 4 patients were anastomotic stenosis and 7 patients were no-anastomotic stenosis. The anastomotic biliary leakage of 7 patients was cured with biliary tract reconstruction in 2 patients, with cholangioenterostomy in 2 patients, with biliary reparation in 1 patient and peritoneal drainage in 1 patient but the patient with dual graft received re-transplantation. Three patients with biliary leakage on liver cut surface respectively receiving reparation or drainage were cured, of which 1 patient suffered from bile duct stricture and was finally cured by ERCP. One patient with biliary leakage of aberrant bile duct and 1 with biliary leakage of cystic duct were cured by salvage surgery. For the 4 patients with anastomotic stenosis, 3 patients were cured by ERCP and 1 patient recovered by biliary reconstruction. Among the patients with nonanastomotic stenosis, 3 cases were alleviated by ERCP or PTCD, another 3 patients had to receive retransplantation, of which 2 patients recovered well without surgery-related complications, one died of severe infection. Conclusions Biliary complications are common among liver transplant patients often causing significant mortality and morbidity necessitating comprehensive salvage procedures, though most of them are preventable.