Background Retinal neovascularization disease is a group of threatening-vision eye diseases.Researches showed that cathepsin B is involved in angiogenesis.Exploring a drug which inhibit retinal blood vessels will provide the basis for the molecular mechanism of these diseases.Objective This study was to investigate the inhibitory role of cathepsin B-RNAi-lentivirus on retinal angiogenesis.Methods Sixty 7-day-old C57BL/6J mice were raised together with maternal mice in the closed box with the oxygen concentration of (75-2)％ for 5 days to establish the retinal angiogenesis mouse models.The mice were then taken into the normal air environment for continuous raise and were randomized into 3 groups.NC-GFP-LV of 1 μl and the equal volume of cathepsin B-RNAi-lentivirus was intravitreously injected respectively in 40 eyes in the control group and the gene treatment group,and no drug was administered in the 40 eyes of the model group.The mice were sacrificed and retinas were obtained.Expression of cathepsin B protein in the retina was detected by Western blot assay (cathepsin B/β-actin).Real-time PCR was used to detect and compare the expression level of cathepsin B mRNA (2△△Ct).FITC-dextran was used to perform heart infusion for the retinal stretched preparation 5 days after intravitreously injection.Retinal neovascularization was examined by fluorescent angiography.Results The expression level (2-△△Ct) of cathepsin B mRNA was 0.74 ±0.12 in the gene treatment group,showing a significant decline in comparison with 1.66±0.17 and 1.58±0.29 in the model group and control group (q--0.746,1.588,P＜ 0.01).The expression level of cathepsin B protein (cathepsin B/β-actin) in the retina was 0.64±0.06,0.93±0.09 and 0.96±0.09 respectively in the gene treatment group,model group and control group,indicating a significant reduce in the gene treatment group (q =0.637,0.894,P＜0.01).Distorted vessels were seen in the mice retinas of the model group with more branches and vascular anastomosis,and fluorescine leakage was exhibited under the fluorescence microscope.However,the vessels were regular with less branches and angiogenesis.Conclusions Cathepsin B-RNAi-lentivirus can effectively inhibit oxygen-induced retinal angiogenesis in mouse.

Selective estrogen receptor modulators (SERMs) is a class of estrogen-like non-steroid compounds that are able to bind to steroid hormone receptors .They can act as estrogen receptor agonist or antagonist depending on the target tissue and hormonal environment .Additionally , SERMs play an antioxidant role by scavenging oxygen free redicals , inhibiting lipid peroxidation , adjusting the level of NO and NOS , inhibiting mitochondrial permeability transition , improving the metabolism of free fatty acids in the mitochon-drial and regulating non-genomic transcription pathway .

The educational evaluation of humanistic quality of medical universities and colleges has many characteristics, that the content is abundant, the methods are various, the mechanism is intructive, the objects are self-disciplined, the effects are obscure and the indication is diverse and ambiguous The study of the content, the purpose, the function and the principle of the educational evaluation of humanistic quality of medical universities and colleges is vital important to establishing operable system of the educational evaluation. The study also plays an important role in enhancing full-scale, coordinative, sustained development of the evaluation.

Since the emergence in 1980s,community-associated methicillin-resistant Staphylococcus Aurues (CA-MRSA) has caught great attention of the researchers and clinical practitioners all over the world. In recent scientific papers,people found that CA-MRSA's capability to adapt itself to the hostile environment and to colonize is a kind of important virulence factor. A newly unveiled gene,designated arginine catabolic mobile element (ACME),in USA300 stains contributes much to this sort of ability. The arginine deiminase encoded by ACME plays an important role in colonization.

Carrier Proteins ; Humans ; Inflammasomes ; NLR Family, Pyrin Domain-Containing 3 Protein ; Silicosis ; pathology

This study was designed to discover filovirus entry inhibitors in a drug library of commercial medicines. One thousand and six hundred drugs were screened using the ZEBOV-GP/HIV model, a pseudovirus formed by an HIV-core packed with the Zaire Ebola virus glycoprotein. We identified 12 gonadal hormone drugs with inhibitory activities in ZEBOV-GP/HIV entry at final concentration of 10 μmol x L(-1). Among them, three drugs exhibited strong activities with IC50 < 1 μmol x L(-1), such as toremifene citrate (IC50: 0.19 ± 0.02 μmol x L(-1)), tamoxifen citrate (IC50: 0.32 ± 0.01 μmol x L(-1)) and clomiphene citrate (IC50: 0.53 ± 0.02 μmol x L(-1)); seven drugs had moderate activities with IC50 between 1 and 10 μmol x L(-1), such as estradiol benzoate (IC50: 1.83 ± 5.69 μmol x L(-1)), raloxifene hydrochloride (IC50: 3.48 ± 0.07 μmol x L(-1)), equilin (IC50: 4.00 ± 9.94 μmol x L(-1)), estradiol (IC50: 5.26 ± 9.92 μmol x L(-1)), quinestrol (IC50: 6.36?5.37 gmol-L1), estrone (IC50: 6.87 ± 0.03 μmol-L1) and finasteride (IC50: 9.94 ± 0.45 μmol x L(-1)); two drugs, hexestrol (IC50: 14.20 ± 0.55 μmol x L(-1)) and chlormadinone acetate (IC50: 24.60 ± 0.36 μmol x L(-1)), had weak activities against ZEBOV. Further, toremifene citrate, tamoxifen citrate, clomiphene citrate, raloxifene hydrochloride and quinestrol could block both pseudovirus type Sudan ebola virus (SEBOV-GP/HIV) and Marburg virus (MARV-GP/HIV) entries.
Antiviral Agents ; pharmacology ; Drug Evaluation, Preclinical ; Ebolavirus ; drug effects ; physiology ; Hemorrhagic Fever, Ebola ; Humans ; Marburgvirus ; drug effects ; physiology ; Selective Estrogen Receptor Modulators ; pharmacology ; Virus Internalization ; drug effects

Objective To study the clinical value of detection of peripheral blood natural killer(NK) cells subsets in patients with malignant hematological diseases.Methods A total of 100 patients with malignant blood disease were enrolled from March 2014 to April 2016 as the observation group,including 50 cases in acute stage and 50 cases in mild stage.At the same time,100 health subjects were enrolled as the control group.The number of NK cells in peripheral blood and the changes of subgroups were compared.Results The number of NK cells in the different groups were compared,the absolute numbers and relative numbers of NK cells in the acute phase of leukemia and lymphoma were much lower than those in the control group(P<0.05).While the absolute number and relative number of NK cells in mild stage of leukemia and lymphoma were higher than that in acute phase(P<0.05).After treatment,the absolute number and relative number of NK cells in patients with leukemia and lymphoma were higher than before treatment(P<0.05).Before treatment,levels of CD56bright and CD56dim in patients with leukemia and lymphoma were statistically different with those of control group(P<0.05).After treatment,CD56bright and CD56dim levels were significantly improved in both groups(P<0.05).Conclusion The number of peripheral blood NK cells in patients with hematological malignancies could be reduced,and the cells function might be compromised.Detection of NK cell subsets could be with guiding significance in the treatment of malignant hematologic disease.

Objective To evaluate quantitative examination of urinary sediment bacteria as a basic feasibility of screening indicators for urinary tract infection .Methods 191 outpatients and inpatient specimens were gathered firstly to implement a urine culture ,and then the rest of the urine were used for sediment bacteria quantitative testing .Meanwhile ,bacterial culture was conducted as the standard .According to the results of bacterial culture ,receiver operating characteristic(ROC) was drawn ,the threshold values of leukocyte and bacteria counts for diagnosis of urinary tract infection were found out and its sensitivity ,specificity ,positive / negative predictive value ,false positive/false negative rate and accuracy were calculated .Results The positive rate of urine culture was 39 .7% ,and the most common pathogen was Escherichia coli .The threshold value of bacteria and leukocyte counts for diagnosis of urinary tract infection was 1 024 .5/μL and 135 .8/μL respectively .When combined leukocyte and bacteria counts for urinary tract infection ,the optimum sensitivity was 62 .5% ,specificity was 98 .1% ,positive predictive value was 95 .7% ,negative predictive value was 79 .6% ,false positive rate was 1 .9% ,false negative rate was 37 .5% ,and accuracy was 83 .8% .Conclusion With UF‐1000i urinary sediment analyzer ,the combined determination of leukocyte and bacteria counts can remove the great mass of negative results ,Especially the results of bacterial culture positive predictability is higher ,but still can not replace of quantitative bacterial culture .

OBJECTIVETo explore the effect of 3-n-butylphthalide pretreatment on the delayed neuronal death(DND) and the expreesion of heat shock protein70 (HSP70) in rat hippocampus after ischemia/ reperfusion.

METHODSAll rats were randomly divided into sham group (n = 36), total cerebral ischemia (TCI) group (n = 36), butylphthalide (NBP) group (n = 6), NBP + TCI group( n = 36), quercetin + NBP + TCI group (n = 6), dimethyl sulfoxide (DMSO) + NBP + TCI group (n = 6). The model of total cerebral ischemia/reperfusion was established by blocking vertebral arteries and carotid arteries. In sham group, TCI group and NBP group, the animals were further divided into instantly, 6 h, 12 h, 1 d, 3 d, 5 d groups according to the time interval after sham operation or TCI. Histological changes of the hippocampus were evaluated using thionin staining under light microscope by determining the delayed neuronal death (DND) and the expression of HSP70 was assayed using immunohistochemistry.

RESULTSNBP pretreatment could reduce delayed neuronal death in CA1 of hippocampus induced by TCI-reperfusion injury in rats, and up-regulated the expression of HSP70 in CA1 hippocampus of brain ischemic/reperfusion for 5 days. Quercetin blocked the acquirement of the brain ischemic tolerance induced by NBP preconditioning.

CONCLUSION3-n-butylphthalide (NBP) prevents the neurons from ischemia/reperfusion injury through upregulating the expression of HSP70.

Animals ; Benzofurans ; pharmacology ; CA1 Region, Hippocampal ; cytology ; pathology ; Cell Death ; Cerebral Infarction ; drug therapy ; HSP70 Heat-Shock Proteins ; metabolism ; Ischemic Preconditioning ; Neurons ; cytology ; Rats ; Rats, Wistar ; Reperfusion Injury ; drug therapy

Objective To obtain I50 anti-idiotype antibody and identify its activity in vitro.Methods I50 anti-idiotype (Id) antibody gene was amplified from the template of fuse 5-I50 by PCR to construct a prokaryotic expression vector pET25b-I50. The expression of pET25b-I50 in E. coli BL21(DE3) was induced by isopropylthio-β-D-galactopyranoside (IPTG) and was confirmed by SDS-PAGE and Western blot with Ab1(FC2) monoclonal antibody and an anti-hexahistidine tag antibody. The method of dialysis refolding was used to restore the activity of I50 anti-Id antibody, which was measured by Dot-ELISA and lymphocyte proliferation assay. Results The recombinant vector was successfully constructed and the recombinant protein was successfully expressed and purified with 90% purity. The relative molecular weight of the expressed protein was 15 kD, which was in accordance with expectation. The activity of I50 anti-Id antibody could be restored and could promote the proliferation of lymphocyte in a dose-dependent manner. Conclusion These results suggested that I50 anti-Id protein vaccine is likely an option in the therapy against nasopharyngeal carcinoma in vivo.