Objective:To prepare fluorouracil-loaded chitosan nanoparticle (5-Fu-CS-NP) for ophthalmologic usage and evaluate its releasing characteristics in vitro. Methods: 5-Fu-CS-NP was prepared with 5-Fu, polyacrylic acid and chitosan using dispersion method. The mean size, entrapment efficiency (EE%), drug loading (DL%) and the in vitro releasing characteristics of 5-Fu-CS-NP were investigated.Results and conclusion: The mean size of 5-Fu-CS-NP was (144.6?3.1) nm, the EE% was 84.5% and the DL% was 3.91%. 5-Fu-CS-NP had a satisfactory sustained-releasing effect and the releasing could last for 3-7 days, and the release behavior was not greatly changed within a pH value of 7.2-7.4.

Objective:To study the expression of neuroglobin (Ngb) in rat cerebral ischemia model and the neuroprotective effect of Ngb after ischemia and hypoxia. Methods: Totally 113 Sprague-Dawley rats were randomly divided into sham-operated group, middle cerebral artery occlusion (MCAO) group, hemorrhagic infarction (HI) group and hemin treatment group. The brain water content, infarcted tissue volume, neuropathologic changes (H-E staining) and expression of Ngb (immunocytochemical staining) were examined 3, 6, 12, and 24 h after model establishment. Results: The brain water contents and the infarcted tissue volumes in the hemin treatment group were significantly different from those of the MCAO group and HI group (P

Objective:To observe the serum level of fibroblast growth factor-23(FGF-23) in patients with end stage renal disease (ESRD) and study its association with phosphorus and vitamin D metabolism.Methods: Serum FGF-23 level was determined by enzyme-linked immunosorbent assay (ELISA) in ESRD patients undergoing haemodialysis (HD, n=50) and peritoneal dialysis (PD, n=24) and in twenty healthy controls (control group,n=20).Serum level of 1,25-(OH) 2VitD was measured by enzyme immunoassay(EIA).Serum intact parathyroid hormone (PTH), creatinine, and calcium and phosphorus were also measured.Results: Serum FGF-23 was obviously higher in HD group([88.51?35.01] ng/L vs [11.76?3.63] ng/L)and PD group([87.85?33.65] ng/L vs [11.76?3.63] ng/L)than in control group. Moreover, the serum level of 1,25-(OH)2VitD was lower in HD and PD groups than in control group ([19.82?4.99] pmol/L vs [48.37?3.47] pmol/L; [24.31?7.11] pmol/L vs [48.37?3.47] pmol/L ), and the level of 1,25-(OH)2VitD was much lower in HD group than in PD group. Pearson relativity analysis showed that serum FGF-23 level was positively correlated with serum creatinine, phosphorus, intact PTH and duration of dialysis(P

Objective:To observe the changes of serum adiponectin level in patients with non-alcoholic fatty liver disease (NAFLD),and to study the correlation between the serum level of adiponectin and NAFLD. Methods: A total of 110 patients with NAFLD who were hospitalized from Feb. 2006 to Mar. 2008 were included in this study. The patients were divided into non-alcoholic steatohepatitis (NASH) group (n=52,group 1) and simple fatty liver group (n=58,group 2). Fifty-four healthy volunteers were taken as normal control (group 3). The height,weight,and body mass index (BMI) were measured in all groups. The fasting blood samples were obtained to examine serum adiponectin,TC,TG,HDL-C and LDL-C. Stepwise regression method was used to analyze relationship between the serum level of adiponectin and NAFLD. Results: The serum adiponectin and HDL-C levels in group 1 and group 2 were significantly lower than those in group 3 (P

Objective:To evaluate the clinical value of 64-slice spiral coronary CT angiography(CTA)in diagnosis of in-stent restenosis(ISR)after percutaneous coronary intervention(PCI)in patients with coronary artery disease.Methods:CTA was used to reconstruct and analyze the 345 segments(each stent was divided into three segments:proximal,middle and distal)of 115 stents in 60 patients with coronary heart disease after PCI.The results of selective coronary angiography(SCA)were taken as the golden standard to evaluate the sensitivity and specificity of CTA in diagnosis of ISR after PCI.Results:CTA clearly showed the location and length of the stents,the stenosis at stent and the characteristics of restenosis plaques.Thirty-nine in-stent restenosis lesions were found by CTA,including 8 calcified lesions and 31 non-calcified lesions.There were 25 lesions at the proximal end of the stent,7 at the middle and 7 at the distal end.Forty-two lesions were found by CTA,including 9 calcified lesions and 33 non-calcified lesions,with 26 at the proximal end,8 at the middle and 8 at the distal end.CTA correctly diagnosed 36 segments,missed 6,and misdiagnosed 3.The sensitivity,specificity,PPV,NPV and accuracy of CTA were 85.71%,99.01%,92.31%,98.04% and 97.39%,respectively.CTA had the highest sensitivity and specificity for diagnosis of the proximal ISR,being 96.15% and 100%,respectively.Proximal stent restenosis accounted for 64.10% of the total.Conclusion:CTA can clearly demonstrate the in-stent restenosis and has a high accuracy in diagnosing restenosis after PCI.CTA is a safe,simple and reliable noninvasive diagnostic method for diagnosis of in-stent restenosis after PCI.

Objective:To investigate the expression of nuclear factor-?B(NF-?B)subunits P50 and c-Rel protein in primary cortical neurons of Wistar rats at different time points of oxygen glucose deprivation/reoxygenation(OGD/R).Methods:The neurons dissociated from the cortex of the neonatal rats were primary cultured and were identified by immunocytochemistry.OGD/R model was established.The study was divided into 6 groups according to different processing methods,including normal group,OGD 4 h treated,OGD 4 h/R 2 h treated,OGD 4 h/R 6 h treated,OGD 4 h/R 12 h treated and OGD 4 h/R 24 h treated groups.The expression of NF-?B P50 and c-Rel protein in neurons was examined by immunocytochemistry method and Western blotting.Results:(1)Immunocytochemistry detection targeting neuron specific enolase(NSE)and beta-Ⅲ tubulin confirmed that the cultured cells were neurons.(2)The expression of NF-?B P50 protein was significantly higher in OGD 4 h group than in control group(P

Objective:To compare the bioactivities of Taohua anti-diarrhea granula prepared by two different methods based on biothermo-kinetics study.Methods:The coarse and fine powder preparations of Taohua decoction were prepared.Microcalorimetry was used to obtain the metabolic curves and biothermo-kinetic parameters of Escherichia coli(E.coli)growth after treated by the two preparations to evaluate their bioactivities.Results:The values of growth rate constant k and maximum heat-out power Pm declined with the concentration increase of the 2 preparations;meanwhile,the values of peak time of the highest peak tm and growth inhibitory ratio I increased with the concentration increase of the two preparations.The results showed that the growth of E.coli was inhibited and the inhibitory effect was strengthened with the concentration increase of the two preparations.The IC50 was 35.9 mg/ml for the coarse powder preparation and 31.4 mg/ml for the fine powder preparation.Aggregate analysis of the metabolic curves and biothermo-kinetic parameters of E.coli indicated that the fine powder preparation of Taohua decoction had stronger inhibitory action against E.coli growth than the traditional coarse powder preparation.Conclusion:Microcalorimetry can be used to examine the bioactivity differences of the fine and coarse preparations of Taohua decoction.Superfine comminution may increase the inhibitory action of Taohua decoction.

Objective:To observe the biological behaviors of colorectal cancer LS174 cells before and after pcDNA3.0-hugl-1 transfection,so as to investigate the association of hugl-1 with colorectal cancer.Methods:The eukaryotic expression vector pcDNA3.0-hugl-1 was constructed and transfected into LS174 cells.RT-PCR and Western blotting methods were used to analyze the expression of hugl-1 mRNA and protein in LS174 cells before and after transfection.Soft agar colony formation assay,wound-healing experiment,adhesion assay and Matrigel invasion assays were used to study the effects of hugl-1 expression on the proliferation,adhesion,movement and invasion in LS174 cells.Results:The recombinant plasmid pcDNA3.0-hugl-1 was successfully constructed.RT-PCR and Western blotting showed that the hugl-1 expression was higher in cells transfected with pcDNA3.0-hugl-1 than in those un-transfected or empty vector-transfected cells (P

Objective:To construct a retroviral vector carrying both enhanced green fluorescent protein(EGFP) and human insulin gene for transfecting the bone marrow mesenchymal stem cells (BMSCs),and to observe the treatment effect of transfected BMSCs after transplanted into diabetes mice.Methods:Two gene segments of insulin-IRES-EGFP and IRES-EGFP were obtained by overlap extension PCR technology,and then the 2 segments were cloned into retroviral vector (pMSCV).The vectors were used to transfect BMSCs after packaged with PT67 cells.The expression of EGFP was observed by inverted fluorescence microscope and the expression of insulin gene was examined by RT-PCR in the infected BMSCs.The transfected BMSCs with 2 viruses were transplanted into diabetic mice separately.The blood glucose levels and body weights of mice were examined in 2 groups,and the results were compared with those of normal control group.Results:The recombinant retroviral vectors pMSCV-insulin-IRES-EGFP and pMSCV-IRES-EGFP were successfully constructed.The BMSCs infected by both vector stably gave out green fluorescence under microscope; the cells infected with pMSCV-insulin-IRES-EGFP also stably expressed human insulin gene.The blood glucose level of the mice transplanted with BMSCs transfected with pMSCV-insulin-IRES-EGFP was significantly lower than that transplanted with BMSCs transfected with pMSCV-IRES-EFGP (P

Objective:To examine the relationship between brain natriuretic peptide (BNP) and the recurrence of atrial fibrillation (AF) after successful electrical cardioversion (EC) by a meta analysis approach.Methods:Based on PubMed,Medline and China National Knowledge Infrastructure (CNKI) databases,related literatures,published from 1980-2008,were searched; a manual search was also performed.The included trials were analyzed by RevMan4.2 software for meta analysis.Results:Totally seven studies were finally included.The analysis revealed that the baseline BNP level were greater in patients with AF recurrence than those without AF recurrence,with the standardized mean difference in the BNP levels being 0.82 units (95% confidence interval 0.12 to 1.52).The test for overall effect Z-score was 2.30,with a P value of 0.02; there was significant difference.Conclusion:It is suggested that the higher BNP level after successful electrical cardioversion is associated with greater risk of AF recurrence.The level of BNP may serve as an indicator for AF recurrence after successful EC.