Tau is a microtubule-associated protein th at can promote micortubulbe polymerization in vitro and can stabilize the asse mbled microtubules. Hyperphosphorylated form of tau comprises the main component of the paired helical filaments and neurofibrillary tangles found in Alzheimer s desease (AD). This paper reviews the functions and the prospects of tau in Al zheimers disease.

The senescence accelerated mouse prone 8 strain was developed through phenotypic selection from a common genetic pool of AKR/J strain of mice.The SAMP8 strain exhibits age-related deterioration in memory and learning as well as A? accumulation early in its lifespan,and it is considered as an effective model for studying Alzheimer′s disease(AD).The SAMR1 strain(senescence accelerated resistant) is control,which exhibits normal aging characteristics.The present studies of SAMP8 have focused on revealing mechanism of accelerated deficits in learning and memory,and evaluating the efficiency of therapeutic drugs against AD.

Protein biochips industry has been making significant progress recently. It played a role in the discovery-oriented proteomics, but now the research emphasis turns to the study of important functional proteins. The emergence of the low density protein biochip technique facilitated this study conversion. This technology has advantages of low cross-reaction, high signal intensity and good precision. This paper reviewed various medical and pharmaceutical applications of the low density protein biochips in disease diagnostics and monitoring, drug discovery and testing, as well as molecular interaction and signaling pathways.

Objective To investigate the effect of preoperative prophylactic parenteral nutrition on prognosis of advanced gastric cancer.Methods A total of 159 patients with advanced gastric cancer in our hospital were collected,and randomly divided into experimental group and control group.80 cases in experimental group were treated with prophylactic parenteral nutrition,and 79 cases in control group were treated with traditional nutrition.The partial indexes of liver function,complications and mortality rate were compared between the two groups before and after surgery.Results The levels of aspartate aminotransferase (AST),alanine aminotransferase (ALT),total bilirubin (TBIL) and direct bilirubin (DBIL) were much lower in experimental group than in control group at 8 days after surgery (t=6.542,6.460,5.634,5.275,all P＜0.001).The levels of ALB and PAB were much higher in experimental group than in control group at 2 and 8 days after surgery (t=12.580,12.471,6.757,12.821,all P＜0.001).The incidence of complications and mortality rate were much lower in experimental group than in control group (x2 =23.409,4.818,P＜0.001 or 0.05).Conclusions Preoperative prophylactic parenteral nutrition can speed up the recovery of liver function and reduce the complications and mortality rate after surgery in patients with advanced gastric cancer.

To study in vitro anti-influenza viral activities of Chinese traditional patent medicines for influenza prevention and treatment, neuraminidase (NA) activity assay was used to examine NA inhibitory activity of 33 Chinese traditional patent medicines through fluorimetric assay, and influenza virus induced cytopathic effect (CPE) inhibition assay was used to verify their anti-influenza viral activities in vitro. The assay results showed that most liquid preparations displayed relatively high NA inhibitory activities, such as Shuanghuanglian oral liquid, Qingkailing oral liquid, Qingre Jiedu oral liquid, and Reduning injection. Among liquid preparations, Shuanghuanglian oral liquid not only displayed the highest NA inhibitory effect, but also exhibited obvious in vitro anti-viral activity in CPE experiment. Among solid preparations, Shuanghuanglian powder for injection showed the highest activity on NA inhibition, and Fufang Yuxingcao tablet showed relatively strong anti-influenza viral activity in CPE cells. From the results, it can be concluded that most Chinese traditional patent medicines possessed NA inhibitory activity, but only a few of them displayed significant in vitro anti-influenza viral activities. These results will provide important information for the isolation of active constituents, and for the clinical uses of Chinese traditional patent medicines for influenza treatment and prevention.

A double targets of high throughput screening model for xanthine oxidase inhibitors and superoxide anion scavengers was established. In the reaction system of xanthine oxidase, WST-1 works as the probe for the ultra oxygen anion generation, and product uric acid works as xanthine oxidase activity indicator. By using SpectraMax M5 continuous spectrum enzyme sign reflectoscope reflector, the changes of these indicators' concentration were observed and the influence factors of this reaction system to establish the high throughput screening model were studied. And the model is confirmed by positive drugs. In the reaction system, the final volume of reaction system is 50 μL and the concentrations of xanthine oxidase is 4 mU x mL(-1), xanthine 250 μmol x L(-1) and WST-1 100 μmol x L(-1), separately. The Z'-factor of model for xanthine oxidase inhibitors is 0.537 4, S/N is 47.519 9; the Z'-factor of model for superoxide anion scavengers is 0.507 4, S/N is 5.388 9. This model for xanthine oxidase inhibitors and superoxide anion scavengers has more common characteristics of the good stability, the fewer reagent types and quantity, the good repeatability, and so on. And it can be widely applied in high-throughput screening research.

The Economists Intelligence Unit pointed out that the global ranking of Chinese people's death quality index falls behind and once again causes people's attention and discussion of death and related legal issues.Palliative Care can make people go to death as far as possible with dignity,ready and calm.So it is gradually being concerned,and the importance of legislation related to it is also becoming increasing.Palliative Care has emerged in our country,but because of the lack of legislative regulation,relatives of patients and medical staff are at risk being accounted for legal liability.Through the analysis of the legitimacy and feasibility of palliative care,this paper put forward some suggestions of relevant legislation and current corresponding countermeasures;it should clarify the legal validity of living will signed by patients,strengthen the supervision in the implementation process and exempt responsibility of relevant personal.

Objective To compare the scores from the simpliifed COMFORT scale with those from the bispectral index (BIS) and analyze the variation among different evaluators in children in an intensive care unit, and to investigate the reliability;validity of simpliifed COMFORT scale. Methods Twenty children between 3 and 16 years of ages on mechanical ventilation and sedation were simultaneously classiifed based on the BIS and the simpliifed COMFORT scale evaluated by 4 independent evalua-tors. The Kappa test was performed and the correlation between the two methods (Pearson correlation) was tested. Results In to-tal, 70 observations were performed on 20 patients. Based on the Kappa coefifcient, the agreement among evaluators ranged from 0.62 to 0.77 (P<0.001). There was a correlation between the BIS and the simpliifed COMFORT scale (r=0.53-0.61,P<0.01). Conclusions Due to the strong consistency between the independent evaluators and the correlation between the two methods, the reliability and validity of simpliifed COMFORT scale are preferable and simpliifed COMFORT scale is useful in classifying the level of sedation in children on mechanical ventilation.

Objective To detect eight kinds of clinical common pathogenic bacteria by DNA microarray.Methods Eight kinds of common pathogenic bacteria,including Staphylococcus aureus,Pseudomonas aeruginosa,Klebsiella pneumoniae,Escherichia coli,Proteus mirabilis,Enterobacter aerogenes,Pseudomonas fluorescens,Shigella sonnei were collected.Universal primers were designed to amplify 16S rRNA gene fragment from the genomic DNA of the eight bacteria,and probes were designed in the highly variable regions.DNA microarray detection system was established and used for detection of colleted bacteria.A total of 50 samples were collected from the Zhongnan Hospital of Wuhan University,including 6 blood samples,32 sputum samples,9 feces samples and 3 bronchoscope lavage samples.DNA were extracted and detected by the established DNA microarray system.Results The desired fragments were well amplified by the self-designed universal primers.The selected probes had good detection results according to repeated detection.Of the 50 samples detected,pathgenic bacteria were accurately detected in 47 samples.Other three samples were not detected as those bacteria were not included in the chip.By optimizing the detection process,the results could be reported within 8 hours.Observation of probe signal attenuation indicated that even attenuated after 60 days,but the attenuation did not affect the results.Conclusion A microarray system was established for detection of clinical common bacteria accurately and quickly,which provided foundation for its clinical application.

Objective To investigate the relationship between dynamic changes of plasma D-dimer and survival rate of the esophageal carcinoma patients pre-and post-operation.Methods 30 cases of normal control group,160 cases of esophageal cancer group( including operation cases n =112),with the gold standard method for the determination of plasma D-dimer.Results There was a link between the level of D-dimer,TNM staging,lymph node metastasis and tumor size in esophageal carcinoma patients.Compared with the preoperation,the plasma D-dimer is significantly elevated 2 years later( t =7.35,P ＞ 0.05 ).Conclusion Before or after the operation,dynamic changes of plasma D-dimer had a relationship with short-term survival rate.