Objective To observe the effect of aqueous extract of Broussonetia papyrifera ( L. ) Vent on the ability of space learning and memory in the rats with Alzheimer' s disease (AD) induced by Aβ 25-35 and Dgalactose and to explore the mechanisms underlying those improvements. Methods The animal model of AD was established by Aβ 25-35 stereotactic injection into the hippocampus of rats in 5 minutes,while long-term intraperitoneal injection with D-gal. After the injection of Aβ25-35,rats were treated with aqueous extract of Broussonetia papyrifera ( L. ) Vent for the next 30 days. Morris water maze with computer system and the spatial exploration experiments were used to assess the behavior performances of the rats. Immunohistochemical technique was used to detect the expression of BiP, PERK and CHOP. Results The ability of space learning and memory of rats complex model of Alzheimer's disease induced by Aβ25-35 and D-gal was damaged,while escape latency was (20.90± 9.16 ) s,and the proportion of original platform quadrant was ( 11.05 ± 4.43 ) %. The expression level of Bip was reduced ,while the mean gray was ( 139.71 ± 3.47 ). The expression level of PERK and CHOP was increased,while the mean gray were (97.96 ± 5.97 ), ( 110.93±4.91 )separately. The escape latency of rats in the aqueous extract of Broussonetia papyrifera ( L. ) Vent treated groups was ( 5.41 ± 3.47 ) s and shorter than the model group,while the proportion of original platform quadrant was (48.28 ± 7.03 )% and higher than the model group.The expression level of Bip in the treated group was higher than the model group, while the mean gray were ( 121.17 ±4.76). The expression level of PERK and CHOP in the treated group was lower than the model group,while the mean gray were ( 122.11 ± 4.73 ), ( 123.34 ± 7.73 ) separately. Significant differences were observed between model group and aqueous extract of Broussonetia papyrifera ( L. ) Vent treated groups (P＜ 0. 05 ～ 0. 01 ).Conclusion Aqueous extract of Broussonetia papyrifera ( L. ) Vent can improve learning and memory disorders of the model rats induced by Aβ25-35 and D-galactose. ER (endoplasmic reticulum) stress and correlated apoptosis pathway might be involved in the underlying mechanisms.

Objective To investigate the management of prevention and control of catheter-related bloodstream in-fection (CRBSI)in intensive care units (ICUs)of tertiary hospitals in a city,and explore stategies.Methods Data about CRBSI prevention and control as well as quality management were collected and surveyed by self-developed questionnaires.Results Of ICUs in 8 hospitals,the incidence of CRBSI was 4.81 ‰,case infection rate was 5.02‰.6 (75.00%)hospitals had standard operating instruction for the prevention and control of CRBSI, 2 (25.00%)hospitals had maintenance record on central venous catheter,and 2(25.00%)hospitals implemented maximum sterile barrier and catheterization combination strategy,none hospital adopted anti-infective dressing and chlorhexidine bathing.Conclusion There are many problems in the standard operating instruction and implementa-tion of measures for the prevention and control of CRBSI in ICUs of tertiary hospitals in this city,which needs to be improved.

Objective To investigate the effects and mechanisms of G protein-coupled receptor 91 (GPR91) on blood-retinal barrier (BRB) in diabetic rats.Methods A lentiviral vector of shRNA targeting rat GPR91 and scrambled shRNA were constructed.Healthy male Sprague-Dawley (SD) rats were selected in this study.The 60 rats were randomized into 4 groups and treated as follows:(1) control group (Group A,n=15),the rats received injections of an equal volume of 0.1％ citrate buffer;(2) streptozocin (STZ) group (Group B,n=15),the rats received injections of STZ;(3) LV.shScrambled group (Group C,n=15),diabetic rats received an intravitreal injection of 1 μl 1 × 10s TU/ml scrambled shRNA lentiviral particles at 2 weeks after the induction of diabetes;(4) LV.shGPRg1 group (Group D,n=15),diabetic rats received an intravitreal injection of 1 μl 1 × 108 TU/ml pGCSIL-GFP-shGPR91 lentiviral particles.At 12 weeks after intravitreal injection,immunohistochemistry and Western blot were used to assess the expression of GPRg1,p-extracellular signal-regulated kinase(ERK)1/2,t-ERK1/2,p-Jun N-terminal kinase (JNK),t-JNK,p-p38 mitogen-activated protein kinase (MAPK) and t-p38 MAPK.Haematoxylin and eosin (HE) staining and Evans blue dye were used to assess the structure and function of the retinal vessel.Immunohistochemistry enzyme-linked immunosorbent assay (ELISA) was used to test the protein level of VEGF.Results Immunohistochemistry staining showed that GPR91 was predominantly localized to the cell bodies of the ganglion cell layer.Western blot showed that GPR91 expression in Group D decreased significantly compared with Group C (F=39.31,P＜0.01).HE staining showed that the retina tissue in Group B and C developed telangiectatic vessels in the inner layer of retina,while the telangiectatic vessels attenuated in Group D.It was also demonstrated in Evans blue dye that the microvascular leakage in Group D decreased by (33.8±4.11)％ compared with Group C and there was significant difference (F =30.35,P＜0.05).The results of ELISA showed the VEGF secretion of Group B and C increased compared with Group A and the VEGF expression in Group D was significantly down regulated after silencing GPR91 gene (F=253.15,P＜0.05).The results of Western blot indicated that compared with Group A,the expressions of p-ERK1/2,p-JNK and p-p38 MAPK were significantly upregulated (q=6.38,2.94,3.45;P＜0.05).Meanwhile,the activation of ERK1/2 was inhibited by GPR91 shRNA and the difference was statistically significant (F=22.50,P＜0.05).Conclusions The intravitreal injection of GPR91 shRNA attenuated the leakage of BRB in diabetic rats.GPR91 regulated the VEGF release and the leakage of BRB possibly through the ERK1/2 signaling pathway.

Diclofenac potassium delayed-sustained release pellets were prepared by double-layer coating method with ethylcellulose aqueous dispersion.The effects of release condition and pellet compositions on the in vitro drug release were evaluated.The formulation was optimized by the central composite design-response surface methodology.It was shown that the pH of the media greatly affected the in vitro drug release of the pellets while the viscosity of the media had little influence.Drug release from the pellets was related to the proportion of the inner coat to the outer coat and the amount of pore forming agent in the outer coat.The optimization of the formulation could be achieved by the central composite design-response surface methodology.

Objective To explore the effects of TSP in classroom air on teachershealth.Methods Air sampling was car-ried out nearby the platform in each in use-classroom at flow of100L/min continuously for6h(n=270)and in office building as controls(n=10)in a university.An investigation on the prevalence of respiratory diseases was performed also.Results The concentration s of TSP were0.10-0.88mg /m 3 in classroom air with a average level of0.38mg /m 3 ,and only0.09mg /m 3 in office air of the university,and0.194mg /m 3 in the ambient air respectively.The TSP concentrations in the classromms exceeded the National Standard of Ambient Air Quality GradeⅢ.The prevalence rates of respiratory diseases including acute and chronic phyryngitis,acute tracheobronchitis and chronic bronchitis were23.3%,73.9%,4.0%and17.4%for teachers,only4%,2.8%,3.2%and7.1%for administrative staff respectively.Con clusion The classroom air pollution by TSP had adverse effects on teachershealth in classrooms.

Objective:To set up a real-time fluorescent RT-PCR and to quantitate the expression levels of hTERT mRNA in peripheral blood mononuclear cells from patients with AML and to observe the correlation between the expression of hTERT mRNA and occurrence and relapse of AML and to probe into the correlation between the expression of hTERT mRNA and telomerase activity.Methods:Real time fluorescent RT-PCR and Lightcycler PCR system were used to quantitate expression levels of hTERT mRNA.PCR-ELISA was used to quantitate telomerase activity.Results:①N_(hTERT) from AML at initial presention,AML at relapse,AML at complete remission and health examinee was 299.2?292.8,550.1?441.3,14.0?9.2 and 12.3?6.7 respectively and the expression levels of hTERT mRNA from AML at initial presention and AML at relapse elevated signficantly comparing to that from AML at complete remission and health examinee,moreover the expression levels from AML at relapse was higher than that from AML at initial presention significantly.②The telomerase activity from AML at initial presention,AML at relapse,AML at complete remission and health examinee was 32.8%?24.3%,48.6%?31.4%,7.4%?5.1% and 7.6%?3.6% respectively and the telomerase activity from AML at initial presention and AML at relapse elevated signficantly comparing to that from AML at complete remission and health examinee,moreover telomerase activity from AML at relapse was higher than that from AML at initial presention significantly.③There was a strong correlation between telomerase activity and the expression of hTERT mRNA and the correlation coeffecients was 0.78.Conclusion:The up-regulation of the expression levels of hTERT mRNA and telomerase activity are one of important factors during occurrence and relapse of AML,moreover there is a strong correlation between telomerase activity and the expression of hTERT mRNA.

Ocular albinism type 1 (OA1),the most form of the ocular albinism,is an X-linked disorder mainly characterized by a severe reduction of visual acuity,hypopigmentation of the retina,photophobia,strabismus and nystagmus. The OA1 gene is located on chromosome Xp22.32 and the coding sequence is divided into nine exons. The OA1 gene codes for a 404 amino acid protein thought to be a melanosomal transmembrane glycoprotein. The OA1 protein is similar to the G protein-coupled receptors,but it's exact function is not clear. There are many mutations and deletions of the OA1 gene have been found.

Objective To investigate the effects of staphylococcus aureus (S.aureus) DNA on anti-tumor in vivo and its mechanism. Methods The chromatic DNA purified from S.aureus was used in the experiments of antitumor in vivo, and immunological indices were measured. Results S.aureus DNA could inhibit the tumor growth by peritoneal injection, increase the serum IFN-? level and regulate the serum TNF-? level in the nude mice carrying transplant tumor. Conclusion S aureus DNA has a characteristic of anti-tumor immunity, and can be used in immunotherapeutic treatment of tumors.

Objective To discuss the effect of community nursing intervention on medication compliance and control rates of blood pressure in patients with essential hypertension.Methods Community nursing intervention was conducted to 73 community patients with essential hypertension. The patients' medication compliance was compared before and after intervention and their control of blood pressure was also observed. Results The difference was statistically significant in the comparison of patients' knowledge of antihypertension and the proper use of antihypertensive drugs before and after intervention. Blood pressure control rate was 80.82%.Conclusions Community nursing intervention can improve patients' medication compliance and effectively control the blood pressure of the patients.