This paper adopted UG8.0 to bulid the stent and blood vessel models. The models were then imported into the finite element analysis software ANSYS. The simulation results of ANSYS software showed that after endothelial stent implantation, the velocity of the blood was slow and the fluctuation of velocity was small, which meant the flow was relatively stable. When blood flowed through the endothelial stent, the pressure gradually became smaller, and the range of the pressure was not wide. The endothelial shear stress basically unchanged. In general, it can be concluded that the endothelial stents have little impact on the flow of blood and can fully realize its function.
Computer Simulation ; Finite Element Analysis ; Humans ; Models, Cardiovascular ; Software ; Stents ; Stress, Mechanical

0.05), whereas definite etiology, partial or generalized seizure, generalized tonic-clonic seizure, epileptic syndrome, nervous system signs, EEG slow wave, EEG epileptiform discharges, imaging abnormalities and therapy after first onset had statistic difference in intermittent time between first seizure and recurrence (all P

Background and purpose:The screening of the genes being related closely with the mechanism of osteosarcoma metastasis was a difficult point in the realm of orthopaedics.We screened differential expression gene of human osteosarcoma MG-63 cell sublines with different metastatic capabilities with cDNA microarray,and studied the molecular mechanism of osteosarcoma metastasis.Methods:Total RNA of human osteosarcoma MG-63 cell sublines A1 and A2 was extracted,purified to mRNA and then reversely transcripted to cDNA probe respectively.The cDNA probe of A1 was labelled with Cy3 and the cDNA probe of A2 was labelled with Cy5.The two samples were hybridized with the cDNA microarray.The hybridization signals were scanned by Agilent Scanner and obtained data were analyzed using Ima Gene 3.0 software and Genespring software.Results:222 differential expression genes were found between cell sublines A1 and A2 by analyzing gene expression profile.There were 119 upregulated genes and 103 downregulated genes in cell sublines A1.All differential expression genes belonged to six main function groups and 49 genes of these had very obvious differentce in expression.Conclusions:There were many differently expressed genes between A1 and A2 cell sublines and only part of them were closely associated with mechanism of osteosarcoma metastasis.The technology of cDNA microarray could analyze effectively gene expression profile of human osteosarcoma MG-63 cell sublines, and supply a new approach to study the mechanism of osteosarcoma metastasis

A questionnaire survey on awareness of child health management was conducted in 238 family members ( 236 were parents) of children aged 0 - 36 months; among whom 92 of children aged 0 to 6 months,85 of children aged 7 to 12 months,33 of children aged 13 to 18 months,16 of children aged 19 to 24 months and 12 of children aged 24 to 36 months.52.1％ of the surveyees had college education level.The awareness about medical examination in last half year in female subjects was higher than males ( P ＜ 0.05).There were no differences in other health management knowledge.The results showed that the average times of medical examination was 2.8 ± 1.9 in last half year; the age for supplement of meat in food was 7.4 ± 2.4 mouths; supplement of meat,animal liver and eggs was more than 7 time a week.The subjects with college education or above paid more attention to the children's growth,risk for rickets and anemia than other peoples.Pure breast feeding accounted for only 37.0％ (88/238).The study indicates that strengthening the knowledge and awareness is necessary to improve the children health management.

Objective To explore expression of IL -33 and IL -33 mRNA in peripheral blood of patients with ankylosing spondylitis,and analyze the clinical significance,so as to provide scientific reference for the treatment and prognosis of the disease.Methods From February 201 4 to May 201 6,32 patients with ankylosing spondylitis were included as study group,30 healthy persons were selected as control group.Real -time quantitative PCR and enzyme -linked immunosorbent assay were used to detect IL -33 mRNA level in peripheral blood and IL -33 level in plasma of subjects.Results Compared with the control group (1 .23 ±0.58),IL -33 mRNA in peripheral blood of patients in the study group was higher(1 .74 ±0.75),and the difference was statistically significant (t =2.981 , P =0.004).ELISA results showed that IL -33 level in plasma of the study group was higher (227.30 ±45.67)pg/mL than the the control group (1 1 4.70 ±39.58)pg/mL,the difference was statistically significant (t =1 0.344,P <0.01 ).Compared with the control group,the ESR,CRP and PLT of the study group were significantly higher[(47.80 ± 4.73)mm/h,(42.60 ±3.38)mg/L,(329.60 ±48.39)×1 09 /L](t =42.542,54.722,1 4.040,all P <0.01 ).IL -33 in plasma and IL -33 mRNA in peripheral blood of ankylosing spondylitis patients were positively correlated with BASDAI(r =0.472,0.457,all P <0.05),CRP(r =0.71 3,0.687,all P <0.05).Conclusion IL -33 and IL -33 mRNA in patients with ankylosing spondylitis significantly increase,indicates that they should play important role in the occurrence and development of ankylosing spondylitis.

Purpose:To look for an ideal screening method in vitro for establishing osteosarcoma cell sublines with different metastat ic potential. Methods:20 osteosarcoma cell sublines were isolated preliminari ly by clone technique in vitro. They were screened by electrophores migratio n rate assay and cell migration assay in vitro and obtained respectively a h igh and low metastatic potential osteosarcoma cell sublines (A1、A2、B1 and B2). The advantages of the two methods were compared and confirmed by using cell pro liferation, agarose clony-formation and transplantation in nude mice. Results:The cell proliferation rate , agarose clony-formation ability and spontaneous metastatic ability to lung of A1 and B1 were obviously h igher than that of A2 and B2 and the difference was statistically significant( P

Objective To investigate the expression of T help cell 1(Th1),T help cell 2(Th2)and related cytokines interleukin 12 (IL -12)and interleukin 4 (IL -4)in the lumbar disc herniation and their clinical significance. Methods 30 postoperative patients with lumbar disc herniation were included as observation group.The control group included 10 patients with lumbar fracture.Flow cytometry was used to distinguish the Th1 and Th2 cells.ELISA was used to measure the expression of interferon γ(IFN -γ),IL -12(the cytokines secreted by Th1 cells)and IL -4 (the cytokine secreted by Th2 cells).RT -PCR was used to detect the mRNA levels of STAT4 and STAT6.Results The distribution of Th1 /Th2 cells was higher in patients with lumbar disc herniation compared to the control group [(6.24 ±2.89)vs (25.12 ±3.20),t =16.26,P <0.05;(2.68 ±0.58)vs (8.16 ±1.20),t =3.84,P <0.05]. The levels of IFN -γand IL -12 in the study group were significantly higher than the control group,the differences were statistically significant[(23.47 ±5.61)vs (7.65 ±3.21),t =8.422,P <0.05;(1.52 ±0.87)vs (5.34 ± 1.39),t =8.135,P <0.05].The level of IL -4 was undetectable in the control group,however,IL -4 expressed in the study group.The expressions of IL -12,IFN -γand IL -4 in the study group were negatively correlated by Spearman correlation analysis (r =-0.57,P <0.05;r =-0.23,P <0.05).In addition,the mRNA level of STAT4 was higher in patients with lumbar disc herniation compared to the control group[(3.21 ±0.49)vs (1.12 ±0.24), t =13.15,P <0.05].Conclusion The expressions of Th1 cells,Th2 cells and related cytokines were participated in the pathogenesis of lumbar disc herniation.

Objective To investigate sensitivity and specificity of myositis specific autoantibodies (MSAs) in polymyositis/dematomyositis(PM/DM ) and other neuromuscular disease. Methods Taking serum from 63 patients with PM/DM (PM/DM group)and 60 definite neuromusclar disease(non-myositis) patients(control group). All the sera were detected for two kind autoantibodies:anti-Jo-1,anti-SRP by immunoblotting method. Calculating sensitivity,specificity of anti-Jo-1 and anti-SRP autoantibodies for the diagnosis PM/DM. Results Positive ratio for anti-Jo-1 and anti-SRP autoantidodies were 17% and 5% respectively in the PM/DM group, while none of the sera from control group detected positive.The specificity of both autoantibodies diagnosis for PM/DM were 100% and (95% CI:94%~100%).The sensitivity was 22%( 95%CI:13%～34%). Conclusion Anti-Jo-1 and anti-SRP autoantibodies are highly specific to PM/DM diagnosis.

Objectives To elucidate the effect of APS replacing cytokine on inducing the cord blood monocyte in vitro into the dendritic cells (DCs) and its cellar immunological characteristic. Methods The cord blood monocytes were isolated and obtained by lymphocyte isolation. three groups were divided: ②Cultured in the RPMI-1640 culture with GM-CSF/IL-4/TNF-?,as the positive control group, with APS in concentration (100mg/L) as the experimental group,and without GM-CSF/IL-4/ TNF-?and APS,as the negative control group, respectively. The morphotype of DCs was identified by inverted optical microscope or scanning electron microscope. The phenotype of cultured 12 days DCs (CD1a, CD80, CD86, and CD83) was identified by flowcytometry. Results Cultured for 72 hours , the morphous of cell of the experimental group grew clustering and began to change from round to irregularity, appearing rough cell face and barb pustute. The longer cell cultured, the more obvious the dendritic structure is. The experimental group cell cultured for 12 days had the most typical dendritic structure. the negative control group cell had no dendritic structure and became the macrophage when cultured for 12 days. The experimental group cell cultured for 10 days showed typical dendritic morphotype by SEM. The experiment group cell and the positive group cell cultured for 12 days significantly expressed the high level phenotype of DCs((CD1a, CD80, CD86, and CD83))by flowcytometry. Conclusions APS and cytokine both could induce the cord blood monocyte to direofive differentiate into functional DC.

ObjectiveTo investigate the effect of infusion of esmolol on expression of hypoxia inducible factor-1α following spinal ischemia-reperfusion (I/R) in rats.MethodsThirty-six healthy male Wistar rats weighing 300-350 g were randomly assigned into 3 groups (n =12 each):group Ⅰ sham operation (group S); group Ⅱ spinal I/R and group Ⅲ esmolol pretreatment (group E).Spinal ischemia was produced by cross-clamping of abdominal aorta distal to renal artery for 20 min in I/R and E groups,Infusion of esmolol 200 g· kg- 1 ·min- 1 was initated 30 min before spinal ischemia and continued for the subsequent 1 h reperfusion in group Ⅲ (E).In groups S and I/R the animals received equal volumes of NS instead of lidocaine.Neurological behavior was assessed according to Tarlov scoring system at 24 and 48 h of reperfusion.The lumbar segment ( L4、5 ) spinal cord was resected at 24 and 48 h ofreperfusion for microscopic examination.The expression of HIF-Ia in spinal cord was detected by immunohistochemistry analysis.ResultsCompared with group S,the expression of HIF-Iα in spinal cord was down-regulated,and Tarlov score was significantly decreased in groups S and l/R.The spinal cord injury was attenuated in group E compared with group I/R.CondusionEsmolol infusion can protect the spinal cord against I/R injury,and inhibition of the expression of HIF-1α is involved in the mechanism.