Objective To investigate the influence of Memantine on changes of N-methyl-D-aspartic acid receptor 2B (NMDAR-2B) level, the expression of postsynaptic density 95 ( PSD-95) and calcium/calmodulin-dependent protein kinase Ⅱ (CaMK Ⅱ)activities in the hippocampus of vascular dementia(VD)rats and their recognition. Methods The VD rat model was established by permanent,bilateral occlusion of the common carotid arteries. One hundred and forty-four Wistar rats were randomly divided into sham-operated group, VD model group and Memantine-treated group. The water maze test was performed to detect the ability of learning and memory of the rats,the changes of NMDAR-2B level were measured by RT-PCR,the changes in the expression of PSD-95 were detected by immunohistochemical staining,and the changes in the CaMK Ⅱ activities were determined by incorporation of ~(32)P into histone. Results Compared with the sham-operated group, the ability of learning and memory of VD rats was decreased significantly(P<0. 01); the level of NMDAR-2B and the expression of PSD-95 increased significantly at the 4th week after operation(F<0. 05 or 0. 01)and decreased at the 8th to 16th week after operation (P<0. 01). Total CaMK Ⅱ activity was increased significantly at the 4th week after operation(P<0. 01) ,then dropped at the 8th week after operation(P>0. 05) ,and decreased significantly at the 12th,16th week after operation(P<0. 01). As for Memantine-treated group,at the 4th week after operation,there was no statistically significant difference in the parameters mentioned above in contrast with the sham-operated group. At the 8th,and 12th week after operation,the ability of learning and memory,the level of NMDAR-2B and the expression of PSD-95 were significantly increased as compared with VD rats(P<0. 01 or 0. 05) ,but total CaMK Ⅱ activity was similar to that of VD rats. Conclusion With the development of VD,NMDAR-2B level,the expression of PSD-95 and CaMK Ⅱ activities were firstly over-activated,and then decreased greatly. Memantine can improve VD rats' recognition by modulating the expression of NMDAR-2B,but its effect on CaMK Ⅱactivity was limited.

Objective To investigate changes of N-methyl-D-aspartic acid receptor 2B(NR2B) level and calcium/calmodulin-dependent protein kinase Ⅱ(CaMK Ⅱ) activities in the hippocampus of vascular dementia(VD) rats and the intervention effects of Memantine.Methods The VD rat models were established by permanent,bilateral occlusion of the common carotid arteries.The rats were randomly divided into VD group and Memantine-treated group.At 4,8,12,16 weeks after operation,the water maze test was performed to detect the ability of learning and memory of the rats.The changes of NR2B level were measured by RT-PCR.The changes of the CaMK Ⅱ activities were determined by incorporation of 32P into histone.The resoults were compared with the sham-operated group.Results Compared with the sham-operated group,the ability of learning and memory of VD group rats at each time point after operation decreased significantly(all P

Objective To compare the clinical effects of vacuum sealing drainage and traditional method on subcutaneous effusion after spinal operation .Methods From June 2009 to June 2011 ,52 cases were randomly divided into 2 groups:group A(treat with vacuum sealing drainage) and group B(treat with traditional method ) .Comparing the cure rate ,wound healing time ,infection rete and satisfaction rate between two groups .Results All cured cases were followed up for 3 months ,all wounds achieved primary healing postoperatively ,and without recurrence .The cure rate was 92 .31% (24/26)in group A ,there was statistically significant difference compared with group B[69 .23% (18/26)](χ2 =4 .457 ,P<0 .05) .The wound healing time was(12 .13 ± 1 .39) d in group A ,and(17 .72 ± 1 .78) d in group B ,which showed statistically significant difference between two groups (t=11 .455 ,P<0 .05) . The satisfaction rate was 84 .62% (22/26)in group A ,and 61 .54% (15/26)in group B ,which showed statistically significant differ-ence between two groups(χ2 =4 .457 ,P<0 .05) .Conclusion The clinical effects of vacuum sealing drainage on subcutaneous effu-sion after spinal operation was obviously superior to traditional method ,and vacuum sealing drainage has advantages such as less pain ,more satisfaction in patients and less workload in medical staff .

The study aims to establish a quantitative nuclear magnetic resonance (QNMR) method for the determination of the absolute content of bosentan. Proton nuclear magnetic resonance spectroscopy [1H NMR] spectra were obtained in CDCl3 with the internal standard dimethyl terephthalate and zg30 pulse sequence by using a Bruker AVANCE II 400 spectrometer. The content of bosentan is determined with QNMR in comparison with the result obtained by mass balance method. The result is 96.25% by QNMR and 96.54% by mass balance method. A rapid and accurate QNMR method has been established for the quantitative determination of the absolute content of bosentan. The study provides a new way for the quality control and calibration of a new reference standard material, it could be the complementary with the mass balance method for the assay of standard reference.
Calibration ; Magnetic Resonance Spectroscopy ; methods ; Molecular Structure ; Protons ; Quality Control ; Sulfonamides ; chemistry

Objective To identify a rapid and efficient fungal genomic DNA extraction method for PCR amplification.Methods Genomic DNA was extracted from Penicillum marneffei,Rhizopus microsporus,Cryptococcus neoformans and Candida albicans by heating pyrolysis,microwave,repeated freezing and thawing,lysozyme digestion,overnight snail enzymatic and Qiagen kit methods.DNA electrophoretogram was observed by gel imaging system.The concentration and purity of extracted DNA were determined with an ultramicro nucleic acid protein tester and the yields were calculated.PCR amplification and sequencing were also performed.ANOVA and SNK-q test were used for data analysis.Results There were statistical differences in concentrations and yields of the fungal DNA extracted from Penicillum marneffei (hyphal phase and yeast phase),Rhizopus microsporus,Coptococcus neoformans and Candida albicans by six methods (F=750.83,220.95,669.35,132.01,510.20 and 1658.35,287.10,963.64,1147.77,4521.22,all P ＜0.01).Of six methods,microwave method gained the highest DNA concentration and yield,followed by heating pyrolysis method,while Qiagen kit method obtained the lowest concentration and yield.All DNA extracted by 6 kinds of methods were positive in PCR amplification.Conclusion All of the six methods can be used for fungal DNA extraction which is sufficient for PCR amplification,but microwave and heating pyrolysis methods are more easy and simple to perform.

Objective To investigate the minimal inhibitory concentration (MIC) of Pseudomonas aeruginosa to antibacterial agents which were induced by disinfectants.Methods The susceptibility test of 68 strains from clinic was determined by VITEK-2 system.The MIC of povidone iodine,glutaraldehyde and chlorhexidine was determined by agar dilution method.68 strains were induced by different concentrations of three kinds of disinfectants for eight times.The concentration of three kinds of disinfectants was lower than their MIC.The MIC before and after inducement was determined by micro dilution.In the mean-while,strains of their MIC raised to antibiotics were inoculated on plate agar containing the PAβN which was the efflux pump inhibitor,in order to determine the phenotype of efflux pump.Results Six strains,MIC in 68 strains significantly changed after induction of disinfectants.The MIC of these six strains was higher than pre-induced to some antibacterial agents such as FQNs,cephems and carbapenem.The induction of povidone iodine and gilutaraldehyde were more obvious,and five strains,phenotype of efflux pump were positive after being induced by these two disinfectants.Conclusions The antimicrobial susceptibility of some Pseu-domonas aeruginosa will change after being induced by some disinfectants and the efflux pump will play an important role in this process.So the reasonable application of disinfectants were indispensable,in order to decrease the resistance and the opportunity of nosocomial infection.

Objective:To isolate mesenchymal stem cells (MSCs) from mouse fetal liver and induce them differentiate into islet B-like cells. Methods:MSCs were isolated from C57BL/6J mouse fetal liver and were induced with high concentration of glucose, basic fibroblast growth factor(bFGF) ,and nicotamine medium. The gene expressions related to islet B cells such as pancreatic duodenal homeobox-1 (PDX-1), proinsulin-1 (INS-1) ,and glucose transporter-2 (GLUT-2) were detected by RT-PCR. Insulin in the treated cells was examined by immunocytochemistry. The insulin clusters were stained with dithizone (DTZ), a zinc-chelating agent known to selectively stain pancreatic B cells. Results: RT-PCR showed that the treated cells expressed PDX-1, INS-1 and GLUT-2, while the undifferentiated cells did not. After approximately 10 d of treatment, the fetal liver cells formed DTZ-stained cell clusters in flasks (80-120 clusters in a flask 25 cm2 in area). Immunocytochemistry also confirmed that these aggregates were strongly positive for insulin. Conclusion: MSCs derived from fetal liver can be induced into islet B-like cells in vitro.

Objective To understand the work tasks of rural doctors in our country and to provide bases for the reforms of clini‐cal medical education of junior colleges .Methods A self‐made questionnaire was performed in 1 245 rural doctors from 86 rural grassroots health institutions in 7 provinces/municipalies of our country .Results The academic levels of rural doctors were low (65 .54% )and the rates of their medical certification holding were low in western district(7 .79% ) .The work load including basic medical care and basic public health services they committed were approximately matching .The top 5 items of basic medical care were ,in proper sequence ,diagnoses and treatments of common diseases ,common symptoms ,chronic disease management ,communi‐ty rehabilitation ,community first aid .The top 5 items of basic public health services were establishment of residents′health files , maternal and child health ,health care of the aged ,immunization ,health education .Conclusion The technological levels of diagnosis and treatment and theoretical knowledge of rural doctors should be further improved .The clinical medical education of junior medi‐cal colleges must strengthen the training and cultivation of the students′abilities of basic public health services ,besides consolida‐ting the training of the abilities of practical diagnosis and treatment .

Objective To study the influence of anesthesia methoda on early postoperative cognitive function in elder orthopedics patients. Methods Fifty patients aged more than 65 years old with fractured femur randomly received general anesthesia(group G, 28 cases) or unilateral combined spinal epidural anesthesia(group E,22 cases). The assessment of postoperative cognitive {unction referred to the scores that achieved in neuropsychological testing with mini mental state examination (MMSE) by special psychological person on the day before and the first day after surgery. It was considered to he postoperative cognitive dysfunction (POCD) when the score was ≥1 standard deviation(SD). Results The score of MMSE was lower in group G than that in group E on the first day alter surgery(P<0. 05). The incidence of POCD on the first day after surgery was higher in group G than that in group E(42.9% vs. 13. 6%) (P<0. 05). Conclusion Compared to combined spinal epidural anesthesia, more POCD takes place in the eldedy underwent orthopedic surgery under general anesthesia.

Objective To evaluate the ability of multi-slice spiral CT angiography(MSCTA)in showing the celiac trunk and its degree branches,and the value of MSCTA in preoperative evaluation of laparoscopic-assisted gastrectomy for advanced gastric carcinoma.Methods A total of 25 consecutive patients scheduled for laparoscopic-assisted gastrectomy with D2 lymph node dissection were evaluated by MSCT,CT angiography(CTA)were reconstructed separately using a volume rendering algorithm(VR).The space anatomy characteristics of celiac artery and its degree branches were evaluated according to the CTA results,and with anatomy information,laparoscopic-assisted gastrectomy with D2 lymph node dissection was processed with references to anatomy.Results In all the 25 cases,the left gastric artery and gastroduodenal artery were accurately identified on MSCTA.In 12 of them,the right gastric artery was accurately identified.The origin of the spleen artery is relatively constant.Laparoscopic-assisted gastrectomy with D2 lymph node dissection was successfully completed without conversion to open surgery in all the cases.The reconstructed celiac trunk and branches are identical with anatomy.Conclusions Three-dimensional CTA using MSCT clearly reveals the anatomy of celiac artery and their space structure.It plays an important role in guiding lymph node dissection during laparoscopic-assisted gastrectomy for advanced gastric carcinoma.