This paper selects the characteristics of hospital deans as a starting point to study the influence of private hospital competitiveness .According to the competitiveness of the private hospitals 100 list in Hong Kong , Eric Peter Hospital Management Research Center released in 2014 , regard the list derived competitiveness evaluation score as the independent variable , and according to the manual excerpt from hospital official website and publicly available information ,the Author has calculated the sample characteristics data of the list of 100 private hospitals and other con-trol variables .Research results demonstrate that private hospital deans 'age distribution structure is too large , and the average years of work in the health care practice is higher , with a higher proportion of senior professional titles and o-verseas study and work backgrounds .Through the establishment of multiple linear regression models for further study showed that the private hospital deans 'age , professional , technical titles and work experience has affected the com-petitiveness of the evaluation of the hospital .Therefore , this paper recommends that private hospitals should give full play to the advantages of expert dean and dean of the decision-making for core position should be clear , and the intro-duction and training of personnel presidency as a priority work .

Serious market failure, as a result of insufficient incentive, exists in the orphan drugs market. Through legislation, the United States designed and established its owns systematic and linked orphan drugs incentive mechanism, which direct sat research, definition, clinical trials and approval of orphan drugs, so as to change the supply and demand status of orphan drugs. Such incentive mechanism erables the United States possess the most ap-proved orphan drugs in the world, and effectively relieves the problem of market failure of the orphan drugs. The ex-perience of the United States provides beneficial reference for the establishment and positive development of orphan drugs incentive mechanism in China.

Objective To study the relationship between GFAP and the malignant degree of astrocytoma. Methods After successful transfer of retrovirus with GFAP (PLBsKG) into C6 cells mediated with liposome, the morphology, growth curve and the proliferative cycle of the target cells were observed. The expression of the protein and mRNA of GFAP was determined with RT-PCR and immunocytochemical staining. In addition, the relationship between the staining GFAP-IR and the malignant degree of astrocytoma was analyzed according to Kermohan′s grading standard in 20 samples of the cells of astrocytoma with imaging analytic system. Results PLBskG resulted in the decrease of GFAP in the target C6 cells, and changed the morphology and increased the proliferation of C6 cells. The number of the cells in the G 2+M phages was increased. The intensity of GFAP-IR staining was negatively correlated to the malignant potency of astrocytoma. The more intensive staining of the cells, the lower of the malignant degree of astrocytoma and vice versa. Conclusion There is a close relationship between GFAP and malignant degree of astrocytoma. The level of GFAP expression serves the index of the malignant degree and prognosis of astrocytoma in certain degree.

Objective　To study the occurence, development and regulation of reactive gliosis with astrocyte (Ast) in vitro. Methods　Ast was isolated and cultured in vitro and its model of reactive gliosis was established by scratching the cultured astrocytes. The reactivity and rules of Ast to injury was studied by morphological changes, RT-PCR, immunocytochemistry, in situ hybridization and imaging analysis. Results　After scratching, the astrocytes showed typical features of reactive gliosis, with the hypertrophic cell body, thickened and lengtheded processes, and enhanced glial fibrillary acidic protein (GFAP) staining. In situ hybridization and RT-PCR analysis confirmed that the expression of GFAP mRNA was markedly increased. These changes occurred 1 d after scratching and reached the peak 5 to 7 d after injuring. Conclusion　A model of reactive astrogliosis was successfully established in vitro which showed an active reaction to injury. The characteristics of reactive gliosis parallel that seen in vivo.

The changes of the morphology and percentage of the macroglia surrounding focus of brain stabbing injury (BSI) were observed by immunohistochemistry,immunoinfluorescence stain and flow cytometer(FCM) and the effect of magroglia during glial scar forming were elucidated.The results showed that a large number of GFAP-immunoreactive positive cells were accumulated around the focus of BSI.These cells were hyperplastic,hypertrophic,and emerged swollen cytoplasmic processes.The most marked changes were observed at 1-2 week after BSI.The results of FCM showed that the percentage of GFAP positive cells increased gradually and reached to a peak during 1～2 week after BSI.The peak ratio of GFAP positive was about 46%.However,the changes of morphology and number of GC positive cells were not detected after BSI.The authors believed that astrocyte is the main macroglia during glial scar formatting .The oligodendrocytes is not an active cell during this course.

The hypercholesterolemia model was established by feeding mice on hypercholester-ol diet. FGS was administered to the hypercholesterolemia mice at the dose of 250,750 and 1500mg ? kg-1 ?d-1, respectively. On the 10,20,30 and 40th day, the serum cholesterol was determined. The results were as follows: 40th day the concentration of TC(Ⅰ,Ⅱ,Ⅲ) was 37. 6,54. 2 and 66. 2mg ?dL-1 lower than that of the control group; and the cocentration of LDL-C was 47. 6,86. 6 and 94. 4mg ?dL-1 lower than that of the control group; while the concentration of HDL-C was 16. 1,38. 2 and 36. 7mg?dL-1 higher than that of the control group. It was proved that FGS was an effective serum cholesterol regulator.

Objective To investigate the effects of mutated PS-1 on the proliferation and apoptosis of RA-induced PC12 cells . Methods The MTT assay, flow cytometry, TUNEL method were used in the research. Results An inhibition of proliferation was demonstrated in the RA-induuced PC12 cells expressing PS-1 mutant L286V. The proliferation of the cells was blocked in the G1→S phase. Whether with or without fetal bovine serum(FBS), PS-1 mutant L286V was able to accelerate the apoptosis of RA-induced PC12 cells. This action was enhanced markedly under the culture without FBS. Conclusions The RA-induced PC12 cells expressing PS-1 mutant L286V shows that the proliferation is inhibited and blocked in the G1→S phase. Whether with or without FBS, PS-1 mutant L286V can accelerate the apoptosis of RA-induced PC12 cells. This action is enhanced markedly under the culture without FBS.

Objective To investigate the cholinergic neuron properties and the changes of proliferation and apoptosis of PC 12 cell induced by different concentrations of all trans retinoic acid(RA). Methods PC 12 cell was induced by RA of concentrations of 1-50 ?mol/L. Changes of cell growth curve and cycle, apoptosis and changes of activities of acetylcholinesterase(AchE) and choline acyltransferase(ChAT) were detected by MTT assay, flow cytometry, TUNEL method, spectrophotometry and radiochemistry assay, respectively. Results ① RA significantly enhanced the activity of ChAT with concentrations between 1 to 20 ?mol/L. The activity of ChAT with concentration of 10 ?mol/L was higher than those with other concentrations. ② The apoptosis of RA induced PC 12 cells was markedly enhanced when concentration was higher than 10 ?mol/L. ③ A concentration dependent inhibition of proliferation was demonstrated in the RA induced PC 12 cells. ④ PC 12 cells proliferation was blocked in the G 1→S phase. Conclusion RA can be used to induce PC 12 cells to show the properties of cholinergic neuron with an optimal concentration of 10 ?mol/L.

The design of a conventional radiotherapy plan is a time-consuming and labor-intensive process, and relevant parameters need to be continuously adjusted in the plan optimization to identify the optimal plan. In addition, experience differences between planners, time invested in plan design, and institutional standards all affect the quality of the plan, which in turn influences clinical outcomes and patient prognosis. In recent years, automatic planning has developed rapidly, which can improve the efficiency of planning design while ensuring the quality of the plan. At present, there are several methods dedicated to the automation of radiotherapy planning design, such as the Rapid Plan and Auto-Planning functions in Eclipse and Pinnacle commercial treatment planning systems, and there are also studies applying artificial intelligence technology in dose prediction to achieve automatic planning. In this article, the research progress on automatic radiotherapy planning was reviewed, and the realization principles, clinical efficacy and existing problems of various automatic planning methods were illustrated.

Objective To investigate the myelination of rat brain at different developmental stages.Methods Luxol fast blue staining,immunohistochemistry and Western blotting were applied to determine the distribution and alternation of myelin sheath in the brains of SD rats at different developmental stages.Results Negative LFB and MBP staining were shown at the stages of embryonicage 18 d(E18),postnatal age 0 d(P0) and P2.At P7,the corpus callosum was weakly stained by LFB.The positive stain of LFB and MBP occurred in P15 on the corpus callosum.With the development going on,the stain turned out stronger,especially in P30,which was similar with that in P90 and P720.The results of Western blot analysis showed the expression of MBP in rat brain was gradually increased with the development of rat brain.Conclusion The myelination starts before P15 in rat brain and becomes mature in P30.The optimal observation time of myelin is 30 d born after.