Natural killer (NK) cells are key members of the innate immune system.The capability of NK cells to kill hematological tumor cells mainly depends on the synthesis of stimulatory and inhibitory signals on the cells surface.In recent years,allogeneic haplo-identical NK cells have shown positive effect of hematologic tumor in hematologic stem cell transplantation and adoptive immunotherapy,and the natural killer cell-based immunotherapy would be applied in clinic.

Sequential monitoring of chimerism after hematopoietic stem cell transplantation is important for disease prognosis, improving transplantation success rate, and reducing relapses of the original diseases. The application of molecular genetic markers in combination with quantitative PCR to the assessment of chimerism,in particularly the dynamic quantitative analysis of lineage-specific chimerism, can provide important guidance for clinical practice.

Objective To understand the current situation of medical postgraduates'!honesty edu-cation, find the weak point and explore new ways of the honesty education. Methods The honesty educa-tion survey questionnaire was designed and conducted to the postgraduates of Grade 2014 in Peking University Health Science Center. The research contents included the basic information of postgraduates, honesty cognition, clean and self-discipline, honesty education, the recommendation of honesty education and the application of honesty education carrier. 1 038 questionnaires of a total of 1 142 questionnaires were recovered and the recovery rate was 90.9%. EPIData3.0 software was used for double entry and database establishment, and SPSS 19.0 software for statistical treatment. Results 82.3% (854) of the postgraduates recognized the work of clean government, but only 62.1% (644) of the postgraduates concerned about it. 78.3% (813) of the postgraduates expressed hatred for the dishonest behavior and hoped to eliminate it. 77.6%(806) postgraduates often paid attention to honest education content which was pushed by the new media. 16.5% (171) postgraduates thought that the new media was very important to the honest cognition. Conclusions We should pay more attention to medical postgraduates'!honesty education, find its weak points according to the investigation and make full use of the network and new media. And at the same time we should combine the actual environment to establish a hierarchy of honesty education system, and carry out honesty education through total environment which contains the school administrators, instructors/head teachers and tutors.

This article described the importance of mechanism refonil in the graduate student training and presented its contents.Also,It summarized the characteristics of the reforill proposals in some universities,and analyzed the problems required to attend and solve ia the refogln.The characteristics of the proposals included to set up innovative fund by university,to perform the student awarded police of tutor leading,to establish the scientific system in recruiting students.By analyzing the problems developed during the reform four measures were lannched,which included to establish evaluating system in assessing students,to create a good relationship between students and tutors,to improve the ability and morality of tutors,and to adjust the management method of research funding.It would be possible to reach the objective of perfecting the reform proposal during the implementation of the measures.

Objective The study analyzes the inadequacies of the research integrity educational practice for the medical postgraduate students in the present stage of China.Furthermore,the paper puts forward improvement suggestions and clears the direction for further efforts.Methods From the perspective of the educational law about cognition,emotion,will and behavior,the comparative analysis method is used,based on the rich experience in the United States.Results There are inadequacies of the research integrity educational practice for the medical postgraduate students in China,including that students lack knowledge learning motivation,and the pattern of education is simple.There are not enough emotional experience channels and the participation of students.Students lack honesty will training,and the intensity of supervision and punishment is not strong.The honesty recognition mechanism is weak,and cannot be used to guide practice.Conclusions In order to improve the level of the research integrity for the medical postgraduate students in China,we should optimize the system,follow the law of education,strengthen the transmission of knowledge,put the academic honesty education into normal work,enhance the emotional experience,build a participatory mechanism,highlight the positive guide,and increase the intensity of punishment.

Objective To investigate the localization and mRNA expression of dopamine receptor subtype D_4 and D_5 mRNA in human stomach and duodenum by in situ hybridization. Methods The oligonucleotide probe was synthesized and labeled with digoxin, and then hybridized with human gastric and duodenal samples, which were stored in liquid nitrogen, fixed in hypothermia, and embedded in paraffin. The results were recorded and quantitatively analyzed using the pathological image computer analysis system. Results Dopamine receptor subtype D_4 and D_5 mRNA both expressed in human stomach as well as duodenum. They distributed mainly in the interstitial of mucosal glands and the lamina propria near lamina muscularis mucosa. The mRNA expression value of D_4 was higher than that of D_5 in both stomach and duodenum. In stomach, the number of positive target cells was 41.29?5.06 vs. 26.25?5.82 ( P

Objective To investigate the influence of sufentanial in postoperative patient controlled epidural analgesia(PCEA) in hemorheology after total hip replacement and its inhibitory effect on thrombosis.Methods Fifty patients,ASA Ⅰ-Ⅱ,undergone total hip replacement were randomly divided into PCEA group (n=25) and control group (n=25), and received continuous epidural anesthesia.After operation,5 mL 0.2% ropivacaine was administered in PCEA group,and then PCEA pump was used,analgesia liquid included 0.4 mg?L-1 sufentanial,0.2% ropivacaine and saline.Petidine was administered intramuscuarly according to pain in control group.VAS scores 1,12,24 and 48 h after operation and changes of various parameters of hemorheology at diffenent time after anesthesia were observed.Results ①The VAS scores 1,12,24,48 h after operation were lower than those in control group (P

Objective:To investigate the differentiation of human neural stem cells(hNSCs) in vitro and to assess the potential of hNSCs transplanted into the pylorus of nude mice.Methods:Central nervous system-derived hNSCs(CNS-hNSCs) were obtained from the subventricular zone of aborted fetus brain(10weeks),suspension cultured,passaged and induced to differentiate in vitro.Stem cell marker neuroepithelial stem cell protein(nestin),enteric neuronal marker protein gene production 9.5(PGP9.5) and glial cell marker glial fibrillary acidic protein(GFAP) were detected by immunofluorescence method.CNS-hNSCs(cultured for 3 months) were transplanted into the pylorus of nude mice and followed by immunofluorescence method.Results:Using the immunofluorescence method,nestin could be identified and the induced cells expressed PGP9.5 and GFAP.After being transplanted into the pylorus of nude mice,CNS-hNSC could be detected to survive at least for 6 weeks.Conclusion:CNS-hNSCs could be cultured,passaged and induced in vitro successfully;transplantation of CNS-hNSCs into gastrointestinal tract could be a potential cellular replacement strategy for gastrointestinal motility disorders.

Mesenchymal stem cells(MSCs), which can be introduced in brain tissue by the strategies of brain parenchyma, blood and neurolymph transplantation, to repair tissue injury and promote functional recovery of neural system, have been considered as the ideal seed cells for the treatment of central nervous system diseases. However, as the special structure exists in the blood-brain barrier, study on correlation between MSCs and blood-brain barrier permeability will make it possible for more MSCs to pass the barrier to perform the treatment. This paper gives a review on the latest research development in the field.

Objective To investigate different clinicopathologic changes in myocardial infarction with and without cardiac rupture in the gerontal patients. Methods 107 gerontal patients with myocardial infarction (rupture group 22, non-rupture group 85) confirmed by necropsy during Jan. 1980 to Oct. 2003 were analyzed to compare the clinicopathologic findings between patients with cardiac rupture and without rupture. Results The mean age of rupture group was higher than that of non-rupture (79.1?9.1 vs 71.8?10.9 years old, P=0.0059). The number of female patients (50.0% vs 24.6%, P=0.0209) and the the number of patients suffering from myocardial infarction for the first time (57.3% vs 52.3%, P=0.0312) were both greater in the rupture group. Previous angina pectoris was significantly less frequently found in the rupture group compared with non-rupture group (45.5% vs 87.1%, P=0.0000). The mean number of major coronary arteries with over 75% stenosis was significantly lower in the rupture group (1.64 vs 2.28 branches/person, P=0.0068). The percentage of single major coronary arteries with significant stenosis was more often seen in the rupture group (59.1% vs 33.8%, P=0.0325). The site of cardiac rupture was more frequenfly located in anterior wall near the apex. Conclusion The results suggested that cardiac rupture occurred more often in older and female patients, in first myocardial infarction episode, with infrequent previous angina pectoris, and frequently involving a severe single coronary artery disease compared with those patients without cardiac rupture. The common location of rupture was anterior wall near the apex.