Objective:To discuss the factors for affecting image quality of flat panel detector on modified DR and the solution.Methods: We observed disturbed condition of image on display by changing spatial resolution of flat panel detector, grid and display under a certain exposure condition, and observed improvement condition of image quality by changing exposure condition.Results: The variation of spatial resolution of flat panel detector, grid and display could affect image quality directly in DR. The variation of exposure dose could also affect resolution and contrast of image within limits.Conclusion: When taking radiography by flat panel detector, if the spatial resolution of image sections were close, the image would form wave-shape- stripe disturbance with strong regularity and high distinguishability; if the deviation of spatial frequency was large or be in multiple relationship, there would be no wave-shape- stripe on image, or the disturbance was inconspicuous. At the same time, choosing suitable radiography condition also showed certain effect to improve image quality.

Objective To evaluate the expression of vitamin D receptor (VDR) in rectal cancer and mucosa adjacent to cancer. Methods The VDR expression of tumor tissue,mucos a 2cm apart from tumor and normal mucosa was detected by imunohistochemistry, mi crospectrophotometer and computer image analysis in 21 cases of rectal carcinoma . Results The VDR expression in rec tal tumor (2.4?0.7) significantly decreased compared to that of the norma l mucosa (6.0?0.6)(P

Pulmonary edema is associated with pancreatic enzymes released into the blood stream during acute pancreatitis.Acute hemorrhagic pancreatitis in rats was established by injecting 5%sodium taurocholate into the pancreatic duct.Before and at the time of induction,SMS201-995 2?g/kg was injected subcutaneously,and followed by 3 h continuous I.V.infusion of NS solution containing SMS201-995 5?g?kg-1?h-1 at a rate of 6ml?kg-1?h-1.The results of this experiment showed that SMS201-995 could:(1) decrease the serum levels of amylase and lipase effectively;(2)reduce lung index and lung extravascular water volume siginficantly;(3)ameliorate the pathologic changs of lung and pancreas evidently.These results also suggested that SMS201-995 could both prevent and treat acute pancreatitis and pulmonary edema induced by it in rats.Therefore,it is theoretically sound that evidence can be proviede by the results obtained in this experiment for the application of SMS201-995,a long acting analogue of somatostatin,to treat clinical acute pancreatitis by its inhibitory effect towards pancreatic exocrine secretion.

Background Anti-VEGF drugs are generally applied in the treatment of ocular neovascular diseases.However,the therapy effect is unsatisfactory in some patients.Studing the effect of hypoxia-inducible factor-1 (HIF-1),a upstream regulatory gene of VEGF,and its limiting enzyme prolyl-4-hydroxylase domain proteins (PHDs) is of important clinical significance.Objective This study was to investigate the negtive regulation of exogeneous PHDs on HIF-1 pathway in human RPE cells.Methods pFLAG-PHD1,pFLAG-PHD2 and pFLAG-PHD3 plasmids were constructed by extracting RNA from Hela cell line and coloning PHD1,PHD2 and PHD3 using reverse transcription PCR with restriction enzyme.The plasmids were identified by gene sequencing.ARPE-19 cells were cultured at 21％ O2 (normoxia group),1％ O2 (hypoxia group),or in hypoxia-mimicking agents (CoCl2,anoxia group),respectively,and then were transfected with plasmids encoding FLAG-tagged PHD1,PHD2,PHD3 and pFLAGCMV2 transfected cells served as blank control.The expressional intensities of PHD1,PHD2 and PHD3 in the cells were detected and compared among different groups by using Western blot assay.The transcriptional activity of HIF-1 in the cells was evaluated with dual luciierase reporter assay.Results Western blot assay showed that PHD1,PHD2 and PHD3 all were expressed in ARPE-19 cells in the normoxia group,hypoxia group and anoxia group.The expression was strong in PHD2 protein and was weak in PHD3 protein,a statistically significant difference was found between PHD2 protein expression and PHD1 or PHD3 expressions (all at P＜0.05).Endogenous HIF-1 activity was elevated in pFLAG-CMX transfected cells in the hypoxia group and anoxia group than that in the normoxia group.Compared with pFLAG-CMX transfected cells,no obvious change was seen in the endogenous HIF-1 activity in the normoxia group,however,HIF-1 activity was declined in the hypoxia group and anoxia group after pFLAG-PHD1,pFLAG-PHD2 or pFLAG-PHD3 transfection.Under the same oxygen environment,HIF-1 activity was lower in the pFLAG-PHD2 transfected cells than that in the pFLAG-PHD1 or pFLAG-PHD3 transfected cells (both at P＜0.05).Conclusions PHDs play a negative regulation to HIF-1 activating pathway in human RPE cells,especially in hypoxia and anoxia cells.Among PHDs proteins,PHD2 presents the strongest inhibition on HIF-1 activating pathway.

Objective To study the effects of panax notoginseng saponins (PNS)on rat superficial renal medulla cells after femoral fracture and to discuss the protective role of PNS in renal injury after fracture. Methods We divided 102 Wistar rats randomly into simple fracture group (n =36),fracture and medication group (n =36)and normal control group (n =30).In the former two groups 6 rats were respectively executed at 1,6,12, 24,36,48 h after fracture modeling,while 5 rats in normal control group were executed at the corresponding time points.Regular HE staining was used to observe pathological changes and TUNEL was used for apoptotic cells.And immunohistochemistry and in situ hybridization were used to detect the expressions of Bcl-2 and Bax in superficial renal medulla tissues.Results In simple fracture group,mild granular degeneration could be seen in renal tubular epithelial cells of superficial renal medulla and the interstitial small vessels were slightly expanded and congested. Compared with simple fracture group,the lesions were slighter in fracture and medication group.In simple fracture group,Bcl-2 and Bcl-2 mRNA expressions were significantly higher than those in normal control group at 1 -36 h (P <0.01).Bax expression was higher than that in normal control group at 12-36 h (P <0.01),and Bax mRNA expression was higher than that in normal control group after 6 h after fracture (P < 0.01 ).In fracture and medication group,Bcl-2 expression was obviously higher than that in simple fracture group at 1 h (P <0.01),and Bcl-2 mRNA expression was higher than that in simple fracture group at 1 -48 h (P <0.01).Bax and Bax mRNA expressions were both lower than those in simple fracture group at 1 - 48 h (P < 0.01 ).Conclusion Fracture trauma has significant influences on protein expression and mRNA transcription of Bcl-2 and Bax in superficial renal medulla.PNS can upregulate anti-apoptosis gene Bcl-2 and downregulate pro-apoptosis gene Bax,thus playing the role of inhibiting tissue cell apoptosis.

Objective The study was to explore the effect of the Wechat combined with discharge supervision on rehabilitation of empty-nesters with total knee arthroplasty (TKA).Methods 100 emptynesters who were treated with unilateral TKA from September 2013 to August 2014 were selected and randomly divided into the experimental group and the control group with 50 patients in each group.All patients received the same orthopaedic hospital routine therapy and nursing,hospital rehabilitation exercise,guidance,family visits and conventional outpatient care.Besides the above treatment,the experimental group received nursing instruction after discharge by professional nurses through Wechat platform,which included functional exercise guidance,psychological guidance and daily activities instructions.The hospital for special surgery(HSS) knee score and the modified Barthel Index (MBI) score were assessed on the 14th day,the third month and the sixth month after surgery.Results HSS knee score and MBI score had no statistically significant difference between the experimental group and the control group on the 14 th day after surgery; HSS knee score and MBI score of the experimental group on the third month and the sixth month after surgery were significantly higher than those of the con-trol grou,t value was 9.24,11.07 and 21.92,14.14.Conclusions Wechat combined with discharge super-vision can effectively improve the rehabilitation effect of empty-nesters after total knee arthroplasty.

Objective To study the effect of combining loop electrosurgical excision procedure (LEEP) and recombinant human interferon α2b (rhIFNα-2b) suppository in treatment of cervical intraepithelial neoplasia (CIN).Methods Prospective,random and control study was conducted in 82 patients with CINⅠ-CINⅢ.Before canting out LEEP to these patients,all women were performed HPV DNA detection by the method of Hybri Max.Among these patients,41 patients were assigned to the studying group,in which the patients were given rhIFNα-2b suppository for three courses of treatment after LEEP.The other 41 patients who carried out LEEP simply were assigned to the control group.Liquid-based ThinPrep cytology test (TCT) and HPV DNA were examined in the sixth and twelfth month after treatment.Results In the studying group,the cure rate was 90.2％ when LEEP ended six months,and the cure rate was 100.0％ when LEEP ended twelve months.In the control group,the cure rate was 43.9％ when LEEP ended six months,and the cure rate was 61.0％ when LEEP ended twelve months.In the sixth and twelfth month after LEEP,the difference was significant when we compared the cure rate between the two groups (x2 =19.93,19.89,all P ＜ 0.05).Conclusion The clinical effect of combining LEEP and rhIFNα-2b suppository is better than LEEP in treatment of CIN.The method can remove or destroy the cervical lesions effectively and inhibit HPV replication and spread of HPV infection.

Objective To discuss the effect of sIL-1RI on allograft survival after islet transplantation.Methods Islets were isolated and transfected with Ad-sIL-1RI-Ig.Mice were treated with STZ to induce insulin-dependent diabetes mellitus(IDDM) model.Islet transplantation was carried out to IDDM mice with sIL-1RI-Ig gene-modified islet cells.Then the survival time of grafts was tested by daily observing blood glucose and insulin levels.The expression of cytokines was detected in graft after transplantation by using RT-PCR. Pathological changes of the graft were also observed by chromoscopy with HE after transplantation.Results The survival time of the grafts in sIL-1RI-Ig-islet group (39±3 days) was prolonged significantly (P<0.01) as compared with controls.A down-regulation of cytokines expression was detected in grafts after transplantation.Less damage and infiltration of lymphocytes were found in sIL-1RI-Ig gene-transfected group.Conclusion The effects of islet cells modified with sIL-1RI-Ig before transplantation on the rejection of murine islet allograft were investigated.The results verified that sIL-1RI-Ig-modified islet allograft could prolong the survival of grafts significantly,and demonstrated it was possible that sIL-1RI-Ig preventedallograft rejection via reducing the expression of cytokines(TNF-α,IFN-γ,RANTES,etc.).

100 inpatients with heart failure were divided into two groups: 50 with preserved LVEF and 50 with reduced LVEF. Another 50 age-matched healthy subjects served as the control group. The severity and etiology of heart failure, tissue Doppler imaging indexes (Sm;Ea;Aa;E/Ea) and plasma BNP concentrations were compared among the three groups. There was no difference in terms of NYHA classification between groups of preserved LVEF and reduced LVEF. Hypertension and DM are more common in the group of preserved LVEF. The index of Sm decreased most significantly in the group of reduced LVEF, and was negatively correlated with the BNP concentration (r = -0. 35, P ＜ 0. 05 ). The ratio of E/Ea increased gradually among the three groups, and was positively correlated with the BNP concentration ( r = 0. 728, P ＜ 0. 05 ). The LV filling index E/Ea and the BNP concentration may be helpful in the diagnosis of heart failure patients with preserved LVEF.

Objective To explore the effect of silver needle thermo-conduction on cervical spondylosis of vertebral artery type (CSA). Methods 82 patients with CSA were randomly divided into control group (n=41) and treatment group (n=41). The control group was treated with cervical traction combined with microwave diathermy, and the treatment group was treated with silver needle thermo-conduction combined with cervical traction. Both groups were evaluated with Evaluation Scale for Cervical Vertigo (ESCV) and transcranial Doppler before and 1 course after treatment. Results The ESCV score, the peak blood flow velocity of period of contraction of left vertebral artery, right vertebral artery and basilar artery in both groups were significantly higher after treatment than before (P<0.01), the treatment group was better than the control group after treatment (P<0.01). Conclusion Silver needle thermo-conduction combined with cervical traction therapy can accelerate the blood flow of patients with CSA and improve their clinical symptoms