Studies on nanotechnology in the diagnosis and treatment of vascular disease are increasingly widespread. Nanoteehnology produces a marked effect by its targeted characteristic, which provides a new pathway in the diagnosis and treatment of vascular disease. This paper presents the progress on nanotechnolo-gy in the imaging and treatment of vascular disease both at home and abroad.

Objective: To study the effect of levosimendan treatment in patients of dilated cardiomyopathy (DCM) with different heart fraction. Methods: A total of 145 DCM patients were enrolled, based on left ventricular ejection fraction (LVEF), the patients were divided into 3 groups: Mild heart failure (HF) group, the patients with LVEF≤45%,n=15, Moderate HF group, LVEF≤40%,n=58 and Severe HF group, LVEF≤30%,n=72. LVEF, left atrial diameter (LAD), left ventricular end-diastolic diameter (LVEDD) and blood levels of BNP were examined and compared at prior and 7 days after levosimendan treatment respectively. Results: Compared with prior treatment, fater7 days of levosimendan medication, LVEF was elevated at certain degree in all 3 groups, while the statistic improvement was only found in Severe HF group (26.06±3.59) % vs (24.79±2.81) %,P<0.05; LAD and LVEDD had no obvious changes with levosimendan medication in all 3 groups,P>0.05. After levosimendan treatment, blood levels of BNP were decreased in all 3 groups as in Mild HF group (604.80±631.87) pg/ml vs (1252.17±1435.39) pg/ml, Moderate HF group (2369.78±2478.59) pg/ml vs (3206.90±2677.15) pg/ml and Severe HF group (4879.63±5302.42) pg/ml vs (6004.46±5041.59) pg/ml, allP<0.05. The differences of BNP level between prior and after levosimendan treatment, the ratio for BNP reduction were similar among 3 groups, allP>0.05. Conclusion: Levosimendan may, in short term, improve the cardiac function in DCM patients with mild, moderate and severe HF with similar degree; while it could not really change the cardiac structure.

AIM: To investigate the effect of hypoxia on the invasion and migration of lung carcinoma cells. METHODS: Lung carcinoma cell H128 was exposed to normoxia (air, 5% CO 2), hypoxia (5% O 2,5% CO 2,90% N 2) or anoxia (95% N 2,5% CO 2) conditions for 48 hours. The migration ability of the cells was assayed by wound healing methods. The invasiveness ability was determined with HABM-HEM model. The cells exposed to hypoxia were inoculated under skin in nude mice, and then the growth of the tumor and the rate of metastasis to lymph node or lung were observed. The expression of E-cadherin and ?1-integrin on the cells were also assayed by flow cytometry. RESULTS: Compared with normoxic group, the invasiveness and migration in hypoxic group were increased. The rates of tumorgenesis and metastasis to lung in anoxic group were evidently decreased. The expression of E-cadherin was decreased, and the expression of ?1-integrin was increased in hypoxic group. In anoxia group, the invasiveness, migration, the expression of E-cadherin and ?1-integrin were all decreased. CONCLUSIONS: Moderate hypoxia down-regulated the expression of E-cadherin, up-regulated the expression of ?1-integrin, and increased the invasiveness and metastasis of carcinoma cells. Serious hypoxia decreased the expression of adhesive molecules, and the proliferation, invasiveness and migration were also decreased.

AIM:To set up a glutamate-induced cell damage model in cultured hippocampal neurons, and to determine whether glutamate-induced neuronal apoptosis changes and whether this process is mediated by mitochondrial signal transduction pathways involving the release of cytochrome C. METHODS: Hippocampal neurons, isolated and cultured from new born Wistar rats, were exposed to various concentrations of glutamate. Extent of cell death was assessed by measuring the release of lactate dehydrogenase (LDH) in the culture media. Based on these data, an appropriate concentration of glutamate was selected, and all subsequent experiments were carried out under the concentration. Kinetics of glutamate-induced both apoptotic and necrotic cell death after exposure to glutamate for various times(3-24 h) were determined by flow cytometry and LDH release. The caspase-3 protein levels and cytochrome C release from mitochondria into cytosol in hippocampal neurons were determined by Western blotting. RESULTS: Glutamate treatment induced hippocampal neurons death in dose-dependent and time-dependent manners. A significant increase in LDH release (18.4%) was induced in the cells treated with 50 ?mol/L glutamate, compared to control untreated cells(P

ObjectiveTo explore the relationships among psychological capital,social support and mental health of medical staffs.MethodsAccording to convenience sampling principle,101 medical staffs from one three-grade class A hospital in Hebei participated in the study.They were investigated with questionnaires such as Psychological Capital Questionnaire ( PCQ-24),Social Support Rating Scale (SSRS) and Symptom Checklist 90(SCL-90).Results①The scores of self-efficacy,hope,resilience and optimism were(3.73 ±0.58 ),(3.59 ±0.60),(3.81±0.49),(3.70 ± 0.32),all of which are higher than middle points.There were statistic difference in four subscales of psychological capital(P ＜ 0.05 ).Compared with nurses,doctors scored higher in self-efficacy ( (3.92 ±0.66),(3.59 ±0.48) ).The difference was significant(P＜0.05).Among different educational background there were also statistic differences(P ＜ 0.05 ).②Psychological capital was negatively related to the whole factors of SCL-90(P＜0.0l,or P ＜ 0.05 ),however,social support was negatively related to only part of it(P ＜0.05 ).③Psychological capital could negatively predict mental health(P ＜ 0.01 or P ＜ 0.05 ).ConclusionThis research outlines a strong relationship between psychological capital and mental health of medical staffs.But social support has no a significant impact on mental health.

Objective To observe the survival,migration and differentiation of grafted neural stem cells(NSCs)transfected with cardiotrophin-1(CT1)in hippocampus in status epilepticus(SE)rats,and investigate its effect on neuron loss and mossy fiber sprouting(MFS)in hippocampus of SE rats.Methods (1)Lithium-pilocarpine induced SE model rats were divided into 3 groups randomly:CT1-NSCs transplantation group(n=18);NScs transplantation group(n=18)and SE model group(n=18).Another 18 rats served as normal control group.Each group was further divided into 3 time points testing groups(n=6 at each point)corresponding to 1,4 and 8 weeks after transplantation respectively.(2)Under the confocal microscopy,the survival,migration and differentiation of the grafted cells were observed by immunofluorescenee.(3)Morphological changes and neuron loss in the hippocampal CA1 region were examined by Nissl staining.(4)MFS in hippocampal dentate gyrus in rats was obserred by Timm histochemistry.Results(1)At 4 and 8 weeks post-tmusplantation,the numbers of double-labeled NF-200 and EGFP pesitive cells in the CT1-NSCs group were significantly hisher than those in NSCs group.In the former group most of the grafted NSCs migrated away from the needle tract,but in the latter group,grafted ceHs remained at the transplantation site.(2)The numbers of neuron in the hippocampal CA1 region reduced gradually after SE.The numbers of neuron in the CA1 region in CT1-NSCs transplantation rats (68.85±11.49,60.89±12.17 and 51.51±13.34 in 1,4,8 weeks after transplantation respectivelv)were greater than that in NSCs transplantation rats(67.92±10.78,42.56±11.47 and 30.49±10.12).tvalue were 4.650 and 5.334 in 4 and 8 weeks after transplantation(P<0.05).(3)Aberrant MFS in the inner molecular layer of dentate gyrus was observed,and the scores of MFS gradually increased with timelapse.The scores of MFS in CT1-NSCs transplantation rats(0.77±0.04,2.48±0.89 and 2.39±0.82 in 1,4,8 weeks after transplantation respectively)were significant lower than that in NSCs transplantation rats (1.12±0.62,3.17±0.64 and 3.88±0.51,t=6.059,9.511 and 9.728,P<0.05).Conclusions CT1 could promote the survival,migration and differentiation of engrafted NSCs in hippocampud in SE rats.Engrafted NSCs transfected with CT1 have effect on repair of the injured hippocampus,and could inhibit hippocampus MFS in SE rats.

Objective To investigate the diagnostic value of multi‐slice spiral CTA on the SAH patients ,and serum S‐100B pro‐tein in the evaluation of brain damage and cerebral vasospasm in SAH patients .Methods One hundred and sixty six patients with SAH were selected ,and all underwent CTA examination ,the serum S‐100B protein level were detected 1 d ,2 d ,3 d and 7 d after ad‐mission .Results In the 166 patients ,CTA showed 119 aneurysms .With the treatment ,on day 1 S‐100B protein level of Ⅰ - ⅡHunt‐Hess grade patients was (0 .71 ± 0 .11)μg/L ,on day 7 the level was (0 .62 ± 0 .09)μg/L ;S‐100B level of Hunt‐Hess Ⅳ stage patients on day 1 and 7 were (2 .12 ± 0 .23)μg/L and (1 .97 ± 0 .06)μg/L .After treatment ,S‐100B level was proportional to Hunt‐Hess grade .S‐100B protein level of GCS(3-8) score patients were (1 .87 ± 0 .23)μg/L on day 1 and (1 .87 ± 0 .23)μg/L on day 7 .S‐100B protein level of GCS(13-15) score patients were(0 .63 ± 0 .17)μg/L on day 1 ,(0 .44 ± 0 .15)μg/L on day 7 .After treat‐ment ,the S‐100B level was inversely proportional to GCS score .Conclusion CTA could display three‐dimensional structure and the surrounding relations ,and could contribute to the choice of treatment and assessment of the degree of difficulty .Serum and cerebro‐spinal fluid concentration of S‐100B protein level could be used to assess the gravity of the secondary brain damage and the possibili‐ty of cerebral vasospasm .

Objective To evaluate the value of the tests of mean corpuscular volume (MCV ) ,mean corpuscular hemoglobin (MCH) in the screening of thalassemia .Methods 603 cases were performed MCV and MCH tests and gene detection of thalasse-mia .The results of gene detection were used as reference standard .The sensitivity ,specificity ,accuracy ,positive predictive value and negative predictive value of single or combined results of MCV ,MCH tests were calculated .Results The sensitivity and specificity of single MCV test were 91 .2% and 76 .1% ,single MCH test were 91 .2% and 70 .7% .The sensitivity and specificity of parallel combined tests of MCV and MCH were 94 .8% and 61 .4% ,serial combined tests of MCV and MCH were 88 .4% and 75 .6% .Con-clusion The sensitivity of single MCV or MCH test in the screening of thalassemia is high .Parallel combined tests of MCV and MCH can improve the sensitivity ,and will be widely used in the in the screening of thalassemia .

Objective:To screen the antagonist of C5a anaphylatoxin,and further to study the dinetic characteristics of interaction between C5a and its anti-sense peptides.Methods:The anti-sense peptides were screened that can interact with C5a selectively by means of dinetic analysis,via biosensor technique.Results:There is one piece of anti-sense peptide(R4) being screened from these four synthesized peptides.The dissociation equilibrium constant(K D) between R4 and the immobilized hC5a is 6.62?10 -6 mol/L and the K D between R4 and L2 is 7.02?10 -7 . Conclusion:Based on the results obtained,it was concluded that the optic biosensor is a ideal and powerful tool to facilitate the kinetic analysis of interaction between sense peptide and its anti-sense peptide and to screen antagonist of biologic activity molecule.

Electricigens play an important role in microbial fuel cell(MFC) . This review provides an introduction of different electricigens on theirs taxonomical group,biochemical,physiological and morphological characteristics. The ability of electricity production of electricigens and electron transfer mechanisms in microbial fuel cells are also concluded. The prospect of waste water treatment and bio-electricity production is underlined,it is point out in this review that the future research of microorganism for MFC should be focused on enrichment,adaptation,modification and optimization by multi-strains application to improve the performances of MFC.