ObjectiveTo investigate the role of vascular endotheliar growth factor(VEGF),chemokine receptor 4(CXCR4) and stromal cell-derived factor-1(SDF-1) in Wilms tumor as well as their relationship with clinical features by examining the expressions of VEGF,CXCR4 and SDF-1.MethodsThirty cases of Wilms tumor samples and 12 cases of adjacent kidney tissue were collected from the First and the Third Affiliated Hospital of Zhengzhou University from May 2003 to May 2008.Thirteen boys and 17 girls aging from 4 months to 7 years old of whom were 22 favorable histologic types and 8 unfavorable histologic types.By means of cytoplasm to dye buffy for masculine cell,staining intensity and percentage of positive tumor cells serve as the judgment criteria for being positive or negative.All tissues would be tested by hematoxylin and eosin stain at the same time.ResultsThe positive expression rate of VEGF,CXCR4 and SDF-1 in Wilms tumor were 63.33%,70.0% and 53.33%.Those in adjacent normal kidney tissue were 25.0%,8.3% and 16.7%.The 2 groups were statistically significant(Pa

Allergy and Immunology ; Congresses as Topic ; Humans

Objective To investigate the present situations of anticoagulant treatment of non-valvular atri-al fibrillation in order to get better guidance of the clinical anticoagulant therapy and reduce the incidence of stroke caused by atrial fibrillation. Methods The clinical data of NVAF patients hospitalized in the first affili-ated hospital of Chongqing Medical University from January 1 , 2012 to December 31 , 2014 were retrospectively reviewed and analyzed in terms of basic characteristics , medical treatment plan and INR monitoring. Results A total of 1,390 patients were enrolled, 85.97% of whom needed anticoagulant therapy and 25.18% of whom were treated with anticoagulants. For 15.71% of the NVAF patients treated with warfarin , INR met the standard during hospitalization. In the study, such factors as age, coronary heart disease, history of stroke and history of bleed-ing might affect prescription of anticoagulant drugs. Conclusion Most NVAF patients need anticoagulant thera-py, but the rate of anticoagulant therapy is lower than we expected. Among those patients treated with warfarin during hospitalization , the rate of INR meeting the standard is at a lower level. The novel oral anticoagulants are not in wide use in the clinical practice.

Objective To investigate the present situation of anticoagulant therapy on the elderly non valvular atrial fibrilla‐tion (NVAF) hospitalized patients with thromboembolic complications [ischemic stroke ,transient ischemic(TIA)] .Methods A to‐tal of 255 hospital patients in the First Affiliated Hospital of Chongqing Medical University from 2012 to 2014 were recorded by retrospective case analysis .The basic characteristics ,the risk factors of AF ,the medical treatment plan and INR monitoring were analyzed respectively with SPSS20 .0 statistical software .Results A total of 255 patients were enrolled ,66 cases (25 .88% ) were treated with anticoagulation ,and 157 cases (61 .57% ) were treated by antiplatelet drugs .In patients who were taken anticoagulant drugs ,the rate of INR was 15 .15% .Conclusion In the elderly nonvalvular atrial fibrillation patients with thromboembolic compli‐cations ,the rate of anticoagulant therapy is lower than expected .More than half patients were treated by antiplatelet drugs .The pa‐tient who were treated anticoagulation therpy had a low rate of INR standard rate .

Wet age-related macular degeneration (AMD) is one of major causes of blindness in elder people.Intraocular injection of anti-vascular endothelial growth factor (VEGF) -A regimen has made big breakthrough for the treatment on choroidal neovascularization of wet AM D,while long-term follow-up and necessary retreatments are the key issues to remain obtained visual acuity.Multiple strategies of wet AMD have been used in following-up and retreating based on the visual acuity,optical coherence tomography (OCT),ophthalmoscope and fluorescein fundus angiography (FFA) in abroad.However,there also are major differences in the patient' s composition,treatment habits and distribution of medical sources in China from Western.So we suggest to standardize the follow-up and retreatment strategies about intravitreal injection of VEGF-A for wet AMD as to achieve a better effectiveness.OCT-guided individual follow-up and retreatment strategies should be very helpful for maintaining a long-term efficacy,minimizing the treatment time and reducing medical cost.

Adult ; Bone Marrow Transplantation ; Fractures, Ununited ; therapy ; Humans ; Male ; Transplantation, Autologous

Background Retinal neovascularization disease is a common cause of blinding.Retinal neovascularization is related to enhancing proliferation of vascular endothelial cells.So how to inhibit proliferation of vascular endothelial cells is a hot burning issue.p21 is known to be involved in the regulation of cell cycle and therefore inhibit the cell proliferation.However,the relationship of p21 and the proliferation of vascular endothelial cells in retinal neovascularization disease is for further study.Objective The aim of this experiment was to study the proliferation of rhesus retinal vascular endothelial cells(RF/6A) and expression of p21 in RF/6A cells under the hypoxia condition,and discuss their association.Methods The RF/6A cells were cultured and passaged in vitro,then they were randomly divided into normoxia culture group(5％ CO2 +95％ O2) and hypoxia for 1 hour,3,6,12 hours group(1％ 02+5％ CO2 +94％ N2).Flow cytometer(FCM) was used to check the distribution of RF/6A cell cycle in the normoxia culture group and hypoxia for 1 hour,3,6,12 hours groups.MTT assay was used to detect and compare the cell proliferation(A570)among the various groups.The expression of p21 in the cells was analyzed by Western blot.Results FCM showed that the cells proportion of G0/G1 stage was reduced initially and then increased afterward in hypoxia for 1 hour and 3,6,12 hours groups,showing a significant difference among 5 groups (F =20.083,P =0.000),and the cells proportion of S stage and G2/M stage were increased firstly and then declined in different hypoxia groups with statistical significances (F =7.861,P =0.001 ; F =10.305,P =0.003).Compared with normoxia culture group,cells proportion of G0/G1 stage was declined and that of S stage and G2/M stage were raised after hypoxia culture,showing statistically signifcant differences(P＜0.05).MTT showed that cell multiplication capacity(A570 value)strengthened firstly and then weakened in hypoxia groups with time prolongation,showing a significant difference among all the groups(F=7.768,P=0.001),and A570 value in hypoxia for 3 hours and 6 hours groups (0.315± 0.062,0.365 ± 0.064) was significantly higher than that of the normoxia group (0.205 ± 0.063),respectively(P＜0.05).Western blot showed that the expression of p21 in the cells down-regulated at the beginning and then up-regulated with the increase of hypoxia time,and there was statistical significance (F =16.738,P=0.000).The p21 relative levels in different hypoxia groups were reduced in comparison with the normoxia group,showing statistical signifcances(P＜0.05).Conclusions Short-term hypoxia could reduce the expression of the p21 in RF/6A and induce cell proliferation initially,then p21 increases and cell proliferation is inhibited with the prolongation of hypoxia time.

OBJECTIVE: To observe the time-course expression of zonula occludens-1 (ZO-1) in cerebral cortex after traumatic brain injury (TBI). METHODS: The TBI model of mouse was established. The mice were divided in 1 h, 3 h, 6 h, 12 h, 24 h, 3 d, 7 d after TBI, sham and control groups. The permeability of the blood brain barrier was evaluated by measuring the extravasation of Evans blue (EB) dye. The expression of ZO-1 in cerebral cortex in the injured area was detected by Western blotting and immunohistochemistry. RESULTS: The extravasation of EB dye of injured cortex gradually increased from 1 h, peaked at 1-3 d and approximately decreased to normal at 7 d after TBI. Western blotting revealed that the expression of ZO-1 gradually decreased after 1 h, was at the lowest at 1-3 d, and then significantly increased after 7 d but was still lower than that of normal and sham groups. The result of immunohistochemistry showed that ZO-1 had strong expression in vessel of normal cortex, gradually decreased after TBI, and almost disappeared at 3 d after TBI and gradually recovered to normal level later. CONCLUSION The expression of ZO-1 in the injured cortex after TBI initially decreases and then increases. The negative correlation between ZO-1 expression and EB extravasation after TBI could be used as a new indicator for wound age estimation.
Animals ; Blood-Brain Barrier ; Blotting, Western ; Brain Injuries/physiopathology* ; Cerebral Cortex/metabolism* ; Immunohistochemistry ; Mice ; Permeability ; Tight Junctions/metabolism* ; Zonula Occludens-1 Protein/metabolism*

OBJECTIVE: To explore the injury mechanism of the human knee in a traffic accident by establishing a 3D finite element (FE) model. METHODS: The FE model, composed of femur, tibia, fibula, patella, meniscus, knee ligaments and surrounding soft tissues, was reconstructed by CT scanning data from a male volunteer. Validation was performed by the lateral impact simulation, and the stress and strain results were obtained to be compared with those previously reported for injury prediction. RESULTS: The results derived from the FE model were found to be similar with those previously reported, most of the ligaments and meniscus wounded at 40 m/s collision, which was readily observed. CONCLUSION The simulation results generated by FE model can be effectively used for the injury mechanism analysis of initial contact.
Accidents, Traffic ; Biomechanical Phenomena ; Femur ; Finite Element Analysis ; Humans ; Knee Injuries/etiology* ; Knee Joint ; Male ; Models, Theoretical ; Tibia

In order to make sure whether Panax notoginseng is sensitive to chloridion and guide fertilization in planting of P. notoginseng, the effects of the different proportion of potassium chloride (KCl) and potassium sulfate (K2SO4) on the yield, quality of P. notoginseng were studied. The results showed that K fertilizer significantly improved the growth of P. notoginseng and increased the biomass per plant or per pot and the content of N, P, K and the content of saponin. In cases of conditions such as potassium, and the effects of K2SO4 on increasing the petiole length, leaf size, rhizome length, root length, and content and accumulation of Ginsenoside Rg1 were better than those of KCl. While compared with K2SO4, KCl was more conducive to augmenting height, root width, the biomass of shoot, rhizome, root and the content of Ginsenoside Rb1 and Rd. There was not remarkable difference in agronomic characters, biomass and the content of N, P, K among KCl, K2SO4 and the combination of KCl and K2SO4. However, the content of saponin of the treatment with combination of KCl and K2SO4 was significant higher than that of single KCl or K2SO4 treatments. K fertilizer significantly increased yield and the content of saponins. And P. notoginseng was not sensitive to chloridion. KCl increased the yield and the content of saponins of P. notoginseng as well as K2SO4, and the combination treatment was superior to single treatment. It is recommended that the KCl should be adopted in production, to reduce the cost of potash fertilizer.
Agriculture ; Fertilizers ; analysis ; Panax notoginseng ; chemistry ; growth & development ; Potassium Chloride ; analysis ; metabolism ; Quality Control ; Soil ; chemistry ; Sulfates ; analysis ; metabolism