Objective: The effect of whole body irradiation (WBI) on B7-1 and B7-2 express ion in peritoneal macrophages in mice was observed.Methods:Immunohistochemistry (ABC method) was used. Results: The upregulation of B7-2 expression induced by WBI X-rays appeared ea r lier than that of B7-1.The study on the dose-effect relationship showed that t he ex pression of both B7-1 and B7-2 reached its peak at 0.075 Gy after WBI X-rays. Th e doses inducing a second peak of B7-1 and B7-2 upregulation were higher in th e case of WBI in comparison with in vitro irradiation. Conclusion: The results suggested that the upregulation of expression of B7 mole cules after irradiation might be an important factor involved in the enhancing e ffect of low dose radiation on immunity.

OBJECTIVE To provide evidences for working out methods of nosocomial infection surveillance on the basis of investigation of nosocomial infection in our hospital.METHODS By efforts of the professional staff of hospital,with cooperation of the clinic personnel infection management group,all patients were investigated by bed-visiting and patients medical records checking.The data were analyzed.RESULTS Of the 1261 patients investigated,the prevalence rate of NI was 5.15%.The common sites of nosocomial infections were lower respiratory tract(32.31%),upper respiratory tract(16.92%),surgical wound(9.23%)and peritoneal cavity(6.15%).CONCLUSIONS The prevalence survey is a rapid and efficient method,which could offer evidence of target surveillance of NI.

Objective:Egr-1 promoter was amplificated and Egr-PGL plasmid was constructed to study the expression of luciferase in transfected NIH3T3 cells after different doses of X-ray irradiation.Methods:Egr-1p was amlificated by PCR and inserted into PGL3-E vector.The expression of luciferase induced by X-ray was studied by counting the light of luciferase and stubstrate.Results:Egr-1 cDNA was obtained by PCR and was sequenced.The results indicated the sequence was almost correct.The Egr-1p was connected with PGL3 vector and was detected by electrophoresis.The constructs were used to transfect mouse NIH3T3 cells to characterize the regulatory function of Egr-1p after exposure to X-ray irradiation.The results indicate that the expression of luciferase of all groups irradiated is highter than that of 0 Gy group.The expression of groups irradiated is about 5-7.5 times greater than that of 0 Gy group.Conclusion:Egr-1pobtained can induce the expression of its downstream gene after different doses of X-ray irradiation.Low dose irradiation also can do it and it is may be more important in tumor gene therapy.

Objective To explore the evaluation of contrast enhanced CT with multi -direction adjusting multi -planar reformation(MPR)on the stomach wall invasion of advanced gastric cancer.Methods 105 cases of advanced gastric cancer proved by pathology after surgery were checked by contrast enhanced CT before surgery.All the images were reconstructed by multi -direction adjusting MPR to show perfectly the lesions of gastric cancer,T stage diagnosed by CT were compared with the T stage diagnosed by pathology.Results T1,T2,T3,T4 stage diag-nosed by pathology were 9 cases,23 cases,46 cases and 27 cases respectively,the accuracy of multi -direction adjus-ting MPR in diagnosing T1,T2,T3,T4 stage were 98.1%,93.3%,86.7%,91.4% respectively.Conclusion Con-trast enhanced CT with multi -direction adjusting MPR can improve the accuracy in diagnosing the T stage of ad-vanced gastric cancer,which can be used to evaluate the staging of advanced gastric cancer.

Objective To study the inhibitory effects of gene combined radiotherapy on mice transplanted with B16 melanoma.Methods Alkaline lysis assay was used to extract and purify the plasmid.Plasmid DNA was injected into tumor by microinjection assay.Mice were inoculated with 5?10~5 of B16 melanoma in right hind legs and the therapy was performed when the diameter of tumor reached at 0.30.5 cm.pNE-mIL-12 and pcDNA-B7-1 plasmids were injected locally three times following with irradiation three times.The tumor growth rate of mice was observed.Results The anti-tumor effect of pNE-mIL-12 combined with pcDNA-B7-1 plasmid following with 2 Gy X-ray irradiation was much better than other groups.It showed that the tumor growth rate was slowed,the survival days of mice were delayed significantly(P

Objective To explore the death distribution characteristics of heart disease and the strategies for its prevention and control, based on data of the death rates of different heart diseases among the residents of Henan province from 1987 to 2006. Methods The mortality rates of heart diseases during past 20 years were analyzed by age, sex, living places (urban vs. rural), and by patterns of heart disease as well with SAS9.1. Results In these past 20 years, the mortality rates of heart diseases ranged from 60.93 to 85.10 per 100 000. The annual mortality rate averaged 74.47 per 100 000, and the standardized mortality rate was 61.10 per 100 000, which equaled to 13.14% of the total death number. The death rates of heart diseases had increased significantly with age. Among the male and female of the cities or the rural, the death was mainly due to coronary heart disease. Concludes According to the death distribution characteristics of heart diseases in Henan Province, the prevention and control efforts should focus on the population over 35 years of age.

Objective To estimate the death number of children under age 5 in Linzhou city during 2004 to 2005 using the capture-recapture method, and to evaluate the integrality of data about the children death report in all death cause registry. Methods The data of children death were collected from sources of registry office, village symposium for the 3rd national death cause survey and police registries. Cases in every source were matched on the name, sex, age, date of death, cause of death and resident address. To fit for dependencies and heterogeneities between three sources, a log-linear model in stratified age and gender was used to estimate the death number of children which did not appear in three sources. Results It was reported that death number of children under age 5 was 359 and the mortality was 2.16% for combined three sources; but from the registry office, the number and mortality were 291 and 1.75%, respectively. The capture-recapture method estimated that the number of death was 398 and the mortality was 2.39%. Under-reporting rates of registry and aggregate database were 26.9% and 9.8%. Female deaths were more likely to go unreported. Under-reporting rates of registry got higher with the decrease of the age at death. Conclusion Registry office or aggregated database underestimated the death number of children under age 5. On the base of data which were collected from police, village and registry, using the capture-recapture method can adjust the death number of children.

Objective To evaluate the clinical effectiveness of treating small coronary artery disease(diameter

Objective To evaluate the changes of QT dispersion (QTd) after successful percutaneous transluminal coronary angioplasty (PTCA) or stent implantation during the recovery period after acute myocardial infarction (AMI).Methods We studied 57 AMI patients who underwent PTCA or stent implantation and 86 normal coronary artery subjects used as control. Maximal and minimal QT interval (QT max and QT min) and QTd (QTd=QT max-QT min) were measured using 12-lead electrocardiography within 1 d before and 1 h after PTCA and stent implantation or coronary angiography.Results QTd and corrected QT dispersion (QTcd) were significantly prolonged in patients with AMI compared with control group. There was no significant difference in QTd and QTcd between anterior AMI and inferior one. QT max, QTc max, QTd and QTcd after PTCA or stent implantation were significantly decreased.Conclusion QTd and QTcd were significantly decreased after successful PTCA or stent implantation which were performed during the recovery period of AMI, which shows it can produce beneficial effects in decreasing the risk of ventricular arrhythmia and reducing mortality in AMI patients.

Objective To observe the effect of daidzein on intima proliferation of rat common carotid artery injured by balloon. Methods 24 male Wistar rats were randomly assigned to 3 groups, 8 rats per group: high dose daidzein group (100 mg/kg?d), low dose daidzein group (50 mg/kg?d) and dissolvent control group. Duplicate the rat common carotid arteries injured by balloon models. Five weeks after operation, serum biochemical indicator such as TC, TG, BUN, ALT and MDA were measured using routine biochemical methods. And pathological sections of common carotid arteries were observed and the changes of vascular histomorphology were estimated by computer analysis of photomicrograms. Results Compared with control group, the intima areas was significant decreased in high dose group and low dose group (86 893?83 452 ?m2 vs 199 419?103 352 ?m2 vs 222 324?56 154 ?m2,P0.05). Conclusion Daidzein can inhibit the intima proliferation of Wistar rat common carotid arteries injured by balloon.