Delayed cerebral vasospasm (DCVS) is an important incapacitating or lethal cause after subarachnoid hemorrhage (SAH),but the patho-physiological process was vague. The effective drugs of treating DCVS are particularly important including ion channel blockers or openers,endothelin synthetic inhibitor or receptor antagonist,anti-inflammatory agents,antioxidants,fibrinolytic agents,traditional Chinese herbs,etc. The article reviews the research progress in the preclinical and clinical pharmacotherapy on DCVS after SAH,and explores the applications and effects and debates about these therapeutic drugs at present.

BACKGROUND:Different structures of matrix models, such as grating, holes and pil ars make different effects on the differentiation of neural stem cel s. OBJECTIVE:To explore the effects of the diameter and spacing, known as physical signals of micro pil ars on neural stem cel differentiation. METHODS:Micro pil ars with different diameters and spacing, both of which had four dimensions of 2.5, 5, 10 and 20μm, were fabricated on silicon substrates by photolithographic method. Purified primary neural stem cel s were incubated on the each micro pil ar for 7 days in vitro. Then the differentiation of neural stem cel s into neuron-like cel s was observed using immunofluorescence staining and quantitative real-time PCR. RESULTS AND CONCLUSION:When the diameters of the micro pil ars were constant and the spacing of micro pil ars varied in the range of 2.5-10μm, the differentiation rate of neural stem cel s increased with the spacing increase. When the spacing was invariable and the diameters changed in the range of 2.5-20μm, the differentiation rate of neural stem cel s declined with the diameter increase. Especial y, the micro pil ars with 2.5μm diameter and 10μm spacing significantly promoted the differentiation of neural stem cel s into neuron-like cel s. These results show that specific micro pil ars with smal diameters and large spacing facilitate the differentiation of neural stem cel s, thus providing guidance for developing tissue-engineered scaffolds.

Objective To explore the influence of corporate governance at public hospitals on their nature of public welfare,in order to provide reference for promoting the reform of public hospital corporate governance.Methods Hypotheses of such impacts were raised by means of literature review. 460 questionnaires were collected from site survey,and four factors of public hospital corporate governance were used as independent variables,and five factors of the public welfare performance as dependent variables,for a correlation analysis and multiple linear regression analysis.Results A clear correlation is found among medical service level,and decision-making mechanism,the mechanism of key employees recruit/evaluation/incentive and their constraints (P < 0.05 ).Completion status of public health services is significantly correlated with the mechanism of recruit/evaluation/incentive and constraint,and their supervision mechanism as well(P <0.05).Medical technology level and cost of medical services are significantly correlated with decision-making mechanism.Conclusions In consideration of public hospital corporate governance,such mechanisms as decision-making,supervision,recruit,evaluation,incentive and constraint for key employees play a key role for public welfare performance.It is recommended to promote the hospital corporate governance reform from the above aspects.

ObjectiveTo assess the quality of applications for the state funds for natural sciences and the research capabilities of researchers in medicine and other relevant fields in China so as to provide the State Fund Committee for Natural Sciences with scientific basis for systematically planning research funds for the medical field and improving the system of supervising funds for life sciences. MethodsAnalysis was conducted on project applications that were submitted to the Life Sciences Department from 1984 through 2001 and underwent quantitative peer review to explore trends of changes in project applications, the scores and the rate of fund-winning projects. ResultsBoth the quantity and quality of project applications in medicine and other relevant fields showed the trend of going up year by year whereas the rate of fund-winning projects presented an opposite trend. ConclusionThe State Fund Committee for Natural Sciences ought to broaden the scope of subsidization for medicine and other relevant fields and readjust existing funds for life sciences so as to shunt and alleviate the application pressure in medicine and other relevant fields.

Humans ; Renal Artery Obstruction ; therapy ; Stents

Cardiovascular System ; Pharmacogenetics

Objective　To explore the effect of photon on blood biologic components in blood photochemical treatment. Methods　After the blood sample was adjusted to an appropriate density, it was treated with 0.1 nmol/ml 8-MOP (8-methoxypsoralen), 0.1 nmol/ml TFO (triple helix-forming oligonuletide) and UVA (ultraviolet A radiation) at the intensity of 1 800 μW/cm2 for 3～20 min. The changes of biologic activities of major components in blood were measured with automatic blood gas analyzer, platelet aggregation analyzer, blood coagulation analyzer, micropipette aspiration system and assay of poly-lysine adsorption. Results　The oxygen content in blood was increased gradually. The resilience of erythrocyte was enhanced ，but its adhesiveness was decreased. The parameters related to blood coagulation had some changes but all remained within the normal ranges. Conclusion　Under the definite condition of blood virus being inactivated effectively, the nonspecific effect of photosensitive response may improve blood oxygen content, enhance the transfiguring ability of erythrocyte and decrease the blood viscosity, but having no obvious change on blood coagulation.

Objective To investigate the repair and reconstruction mechanism of stromal cell derived factor-1(SDF-1) on rat abdominal aorta grafts.Methods Male Sprague-Darley rats received abdominal aorta grafts from male Wistar abdominal arteries.Immunohistochemical staining(IHC) was performed to detect the SDF-1 expression.The expression of CXCR4,the receptor of SDF-1,was demonstrated by RT-PCR.(Results) SDF-1 was expressed on the endothelium all the time during the course of the abdominal aorta grafts in the bodies of recipients.Furthermore,it was found that there was a significant relationship between the expression of SDF-1 on the endothelia and the thickness of the neointima of the rat abdominal aorta grafts.On the other hand,CXCR4 was detected within the abdominal aorta grafts.Conclusions Stem cells could be mobilized by SDF-1 to the abdominal aorta grafts and differentiated into smooth-muscle like cells.Furthermore,SDF-1 is predictive of grafts arteriosclerosis and the subsequent development of chronic graft dysfunction(CGD).

Background To explore the roles of human papilloma virus(HPV)and herpes simplex virus (HSV)in pathogenesis of pterygia are very important for provide more basis for the study of pterygia mechanisms.Objective The aim of the study was to detect the expression of HSV and HPV in pterygia. Methods A total of 68 specimens of pterygia and specimens of normal conjunction tissue were obtained during the operation.The expression of HSV DNA and HPV DNA in pterygia specimens and conjunetival tissue were detected and compared by real time fluorescence quantitative polymerase chain reaction(PCR).Written informed consent was obtained from each patient before the any medical procedure related to this study. Results Real time fluorescence quantitative PCR showed that HPV DNA was detected in 12(17.65％)pterygia specimens,and HSV DNA was found in 15 (22.06％)pterygia specimens；however them were detected in 6(8.82％)and 1(1.47％)in conjunctival tissue respectively.Significant differences were found in the expression both HSV DNA and HPV DNA between pterygium tissue and eonjunctival tissue(HPV：χ2=10.291,P<0.05；HSV：χ2=4.561,P<0.05).The co-expression of HSV DNA and HPV DNA was seen in 5(7.35％)pterygium specimens,but no any co-expression of HSV DNA and HPV DNA was in conjunctival specimen. Conclusion HSV and HPV may participate in the pathogenesis and development of pterygium.The detection of virus DNA can offer an experiment evidence of HSV and HPV in pterygium generation.