Objective To observe the effect of estrogen on BBB permeability,occludin expression after ischemia-reperfusion in rats,and to make a further investigation on the role of estrogen in cerebral ischemia. Methods Ovariectomized rats were randomly divided into sham-operated group,model group,and estrogen pretreatment group. 4 h,24 h,3 d after ischemia-reperfusion were selected as different observation points,and changes of edema,occluding expression,and blood-brain barrier permeability of the 3 points in time were observed. BBB ultra-structure electron microscope observation was made at 24 h and 3 d after ischemia-reperfusion. Changes in cerebral edema were measured by brain water content percentage;protein expressions were measured by Western blot;and BBB permeability was measured by Evans blue as-say. Results Compared with the sham group,brain tissue water content and EB content in model group both increased 4 h after ischemia-reperfusion (P<0. 05),and they keep increasing as time goes by and finally reaching the peak (P<0. 01). Compared with the model group at the same time point,brain tissue water content and EB content in estrogen pretreatment group decreased in different degrees (P<0. 05 or P<0. 01),and it was most significant at the time point of 24 h after ischemia-reperfusion (P<0. 01). Compared with model group,through electron microscope observation,ia was displayed that BBB TJ's open was reduced in estrogen pretreatment group,astrocyte foot process and capillary tube edema were lighter,and it was significant at the time point of 3 d after ischemia-reperfusion. Western blot detection of occludin protein expression found that it was lower in the model group compared with the sham group at 4 h after ischemia-reperfusion,but there was no significant difference (P>0. 05). 24 h after ischemia-reperfusion,the occludin expression were weaker than that in the sham surgery group with a significant difference (P<0. 05),and it keep weakening with a significant difference 3 d after ischemia-reperfusion (P<0. 01). In estrogen group,there was no significant difference compared with the model group in terms of occludin expression at 4 h after ischemia-reper-fusion (P>0. 05). In estrogen group,there was significant difference in occludin protein expression at 24 h and 3 d after ischemia-reperfusion compared with model group at the same time point (P<0. 05). Conclusion BBB ultrastructure disclose TJ was broke and vesicles within EC was increased and astrocyte cell foot process was swelling in MCAO model,it might be the vasogenic brain edema pathological basis for MCAO. In MCAO animal model,with ischemia-reperfusion time increasing,TJ protein occludin expression significantly decreased,it suggests that occludin plays an important role in the regulation of TJ permeability. Estrogen increases has a very close relationship with occludin ex-pression,and it may be one of the mechanisms of protecting BBB integrity and lessening cerebral edema.

ObjectiveTo study of the impact on dose distribution by electron width of energy spectrum and angular distribution using Monte Carlo simulation.MethodsThe simulated electron energy spectrum and angular distributions was as the input parameters and percentage depth dose (PDD) and offaxis curves were simulated by a modified PENELOPE code package. Results PDD and off-axis dose distribution curves are almost the same and are not sensitive to energy spectrum width and angular distribution with the exception of energy spectrum width of 2.5 MeV with obviously different curves.ConclusionsIn the situation of clinical treatment,spectrum and angular distributions can be ignored when their width are not very large.It is helpful to save about 9％ time by using monoenergy beams in treatment planning system development.

0.05).In the patients with 4G/4G polymorphism of PAI1 gene,the GMP-140,vWF,FⅦa,D-D and PAI-1 levels in plasma were significantly increased at immediate postoperative period(P0.05).In the patients with 4G/5G and 5G/5G genotypes,all indexes mentioned above were significantly increased at immediate postoperative period(P0.05).In the patients with 4G/4G genotype,the PAI-1 level in plasma was significantly higher than those in the patients with 4G/5G and 5G/5G genotypes 24 h after PCI(P

Objective To evaluate the predictive effect of preoperative pressure-flow studies on the outcome of transurethral prostatectomy.Methods Sixty-three patients with benign prostatic hyperplasia(BPH) were evaluated by using pressure-flow studies,international prostate symptom score,uroflowmetry,and residual urine volume before and 3 months after surgery.The patients were divided into 3 groups(obstruction equivocal and unobstruction) according to the grade of pressure-flow.The outcome of transurethral prostatectomy were analyzed in each group with detrusor contractility(weak or normal).Results Treatment outcome could be predicted by using the grade of benign prostatic obstruction and detrusor contractility.The sensitivity of which was 73.5%,with a specificity of 88.5% and positive predictive value of 96.2%.Conclusions Urodynamic studies provide great predictive value of option in transurethral prostatectomy.

To obtain and analyze the sequence of the nucleocapsid gene from bovine coronavirus, and to produce the fusion protein of the N gene in E.coli in order to use this recombinant protein for the study of bovine coronavirus. The N gene of BCV-DQ strain was amplified by RT-PCR, in which the primers were designed on the basis of N gene sequence of BCV-Mebus strain. The PCR products of 1 347 bp in length were cloned and sequenced, and then inserted into the prokaryotic vector pET30a. The recombinant plasmids were then transformed into Escherichia coli BL21 and identified by SDS-PAGE and Western blot assay. ELISA assay was optimized of N protein as the coating antigen to detect the viruses in the clinical samples. In comparison with 6 BCV strains in GenBank, the sequence identity was proved to be more than 98.3%. Result in SDS-PAGE showed that the fusion protein had a molecular weight of 60 ku, and could be specifically recognized by mouse serum against BCV. The indirect ELISA was used to test 256 serum samples collected from Heilongjiang province and 65.23% samples were positive. On testing field samples, an overall agreement of 95.31% was generated between the the neutralization test of viruses (VN) and indirect ELISA. It is apparent that the N gene was highly conservative and is expressed in E. coli in high level,also the prokaryotic expression products of this gene show a fine reactiongenicity in immune responses. It was also suggested that the N protein may be a useful antigen for sero-diagnosis and epidemiological investigation of BCV.

OBJECTIVETo determine the clinical significance of interleukin-1beta (IL-1beta) and tumor necrosis factor-alpha( TNF-alpha) in expressed prostatic secretions(EPS) for chronic prostatitis.

METHODSProstatic secretions IL-1beta and TNF-alpha were evaluated for 34 patients with chronic prostatitis, 10 with asymptomatic inflammatory prostatitis, 12 with benign prostatic hyperplasia (BPH) and 8 health controls by enzyme-linked immunosorbent assay (ELISA).

RESULTSIL-1beta and TNF-alpha levels in EPS in the patients of chronic prostatitis with WBC > or = 10/HP and asymptomatic inflammatory prostatitis were obviously higher than those of chronic prostatitis with WBC < 10/HP, BPH and health controls, (P < 0.05 and P < 0.02). There was a correlation between IL-1beta and TNF-alpha (P < 0.003) but none between WBC and IL-1beta or TNF-alpha.

CONCLUSIONCytokines are frequently elevated in EPS in men of chronic prostatitis with high WBC and asymptomatic inflammatory prostatitis, which provides a novel means different from traditional methods based on WBC for the identification of men with chronic prostatitis.

Aged ; Chronic Disease ; Humans ; Interleukin-1 ; analysis ; Male ; Middle Aged ; Prostate ; chemistry ; secretion ; Prostatitis ; immunology ; Tumor Necrosis Factor-alpha ; analysis

Objective To explore the clinical characteristics of pleural effusion associated with peripherally inserted central catheters (PICCs) in neonates. Method The clinical data of pleural effusion caused by PICCs in two neonates were retrospectively analyzed. Results Both 2 cases were preterm female infants. Case 1 was delivered at 26+5 weeks, with a birth weight of 800 g. Dyspnea aggravated 8 hours after the PICC placement. Bedside chest radiograph indicated a large amount of pleural effusion on the right side. PICC was removed, puncture and drainage were performed, and pleural effusion was cured after 6 days of closed thoracic drainage. Case 2 was delivered at 29+3 weeks with a birth weight of 1240 g. Three days after placement of PICC, dyspnea became worse. Bedside chest radiograph showed bilateral pleural effusion, which was cured after PICC removal, puncture and drainage. According to the routine and biochemical indexes of pleural effusion, combined with the medical history, case 1 was consistent with the diagnosis of chylothorax and case 2 was considered as fluid exudation. Conclusion Neonatal PICC-associated pleural effusion is rare, but the etiology is varied and progress is rapid. Vigilance and active treatment is needed in clinic.