Membrane-associated guanylate kinases (MAGUKs) is a class of postsynaptic density proteins (PSDs) in the postsynaptic dense of the postsynaptic membrane,including PSD-95,SAP-102,PSD-93,and SAP-97.MAGUK family members contain several protein binding sites,and these special binding sites are responsible for mediating a variety of signal transduction.MAGUKs participate in the occurrence and development mechanisms in central nervous system diseases,and has become a topic of general interest of neuroscience.This article briefly reviews the roles of MAGUKs in ischemic brain injury.

Objective To investigate the effect of mixed application of lecture-based learning and flipped classroom and problem-based learning in microbiology teaching. Methods The five-year program students of Grade 2013 and Grade 2014 were randomly divided into two groups, and the experimental group (48 students in the teaching reform class) carried out the blended teaching, while the contrast group (48 students of parallel class) carried on the traditional teaching. After the lecture, the teaching effect of the hybrid teaching method and traditional teaching method was analyzed after the theoretical and the experi-mental operation test were adopted, and the four part questionnaire surveys including the integrated use of knowledge, active classroom atmosphere, innovation ability and teaching satisfaction were proceeded in each group. The data of each group was analyzed by t test analysis with SPSS 19.0 respectively. Results The theory test scores of experimental group was (90.16±3.14), which was higher than the control group (82.33± 4.21). The difference between them was very significant (P=0.000). Survey results showed that the integrated use of knowledge, active classroom atmosphere, innovation ability and teaching satisfaction were higher than traditional group. The difference was statistically considered significant (P<0.01). Conclusion Hybrid teaching method is very good for training and development of students' comprehensive quality and ability. It has important significance in improving the students' score.

Influenza is a major threat to millions of people worldwide. Vaccines and antiviral agents are two main options available to reduce the impact of the influenza virus, while anti-influenza agents are the most effective means to prevent the transmission of the highly contagious virus and to treat the epidemics of disease. At present, four anti-influenza agents have been approved by the FDA for the treatment of influenza, including two M2 protein ion channel inhibitors-amantadine and rimantadine and two neuraminidase inhibitors-zanamivir and oseltamivir. Arbidol hydrochloride, launched in Russia, is a potent inhibitor of influenza virus, too. Neuraminidase inhibitors could be classified generally by structure into six different kinds: sialic acid derivatives, benzoic acid derivatives, cyclohexene derivatives, cyclopentane derivatives, pyrrolidine derivatives and natural products. In this paper, recent progress in the research of the action mechanisms and structure-activity relationships of these anti-influenza virus agents were reviewed.

BACKGROUND: Although angiography is the gold standard for the diagnosis of cerebrovascular disease, it cannot be used widely because of its traumatotaxis. Transcranial Doppler ultrasound (TCD) and MRA are both non-invasive examinations, which can be used to evaluate intracranial large artery vascular trunks and hemodynamics.OBJECTIVE: To investigate the reliability of diagnosis with TCD on hemodynamic changes of ischemic cerebrovascular disease (ICVD) and the relativity between TCD and MRA.DESIGN: Case analysis based on patients.SETTING: Neurological Department of the First Affiliated Clinical Hos-pital, Harbin Medical University.PARTICIPANTS: From April 2001 to February 2002,totally 45 patients with stroke,selected from outpatients and inpatients of Neurological Department of First Affiliated Clinical Hospital of Harbin Medical University,examined by CT, to be told the fact and accepted, were taken part in the study.METHODS: Patients were examined with TC-2021 TCD instrument produced by German EME Corporation and VISART1.5T superconduct MR instrument produced by Toshiba. Totally 45 patients had TCD and MRI examinations, and the alternation between two examinations was 1 to 15 days. The hemodynamics and morphological changes were observed including middle cerebral artery (MCA), end of internal carotid artery (ICA),anterior cerebral artery (ACA), posterior cerebral artery (PCA), basal artery (BA), and vertebral artery (VA).large artery vascular trunks and hemodynamic results with TCD and MRA;ty, false positive and false negative with TCD with those of MRA.TCD and MRA: Theory data was Tmin=9.91; χ2=107.92, P ＜ 0.005, it was considered that the results with the rate of TCD were related with that of MRA. The detection rate of TCD was 19.06%, and that of MRA was 15.25%. There were significant differences between the detection rate of standard, the sensibility of diagnosing abnormal vessels by TCD was 78.10%, specificity 94.22%, false positive 7.46%, false negative 23.31%,and the coincidence rate 89.36%.CONCLUSION: TCD can assess exactly the functional status of the vessels. It can also reflect early and sensitively the change of hemodynamics of cerebral blood flow. While MRA can display the change of vascular appearance directly so that the combination of TCD and MRA will be improve sensibility and specificity of diagnosis.

Objective To explore the changes of human mitochondrial COXI,ND1 and ND6 genes expression induced by ionizing irradiation.Methods Changes of human COXI,ND1 and ND6 gene expression were detected by RT-PCR and Real-time PCR 8 h after the irradiation in human lymphoblastoid cell lines,which were exposed to 1-10 Gy 60Co γ-rays.And the dose-effect relationships between expression changes of the genes and the doses were analyzed.The changes of these three genes expression were also analyzed at different post-radiation time-points between 0.5 h and 72 h after irradiation of 5 Gy in order to explore the time-effect.Results The expression of three genes COXI,ND1 and ND6,showed either the dose-effect or the time-effect after irradiation.The gene expression levels of three genes up-regulated generally and the peak change time-point was 4 h after irradiation.Conclusion Ionizing radiation,msht induce the changes of mitochondrial gene expression,and the gene expression level is up-regulated.

Objective To investigate the application of PSA, fPSA concentrations and fPSA/PSA value for diagnosis and therapy of prostatic diseases detected with dissociation enhanced lauthanide fluoroimmunoassay (DELFIA) technique . Methods Thirty-four cases of normal individuals were used as control group, 46 patients with prostatitis as prostatitis group, 123 patients with prostatic hyperplasia as BPH group and 39 patients with prostate cancer as prostate cancer group. PSA, fPSA concentrations and fPSA/PSA value were detected with DELFIA technique. Results In prostate cancer group, the PSA and fPSA concentrations were significantly higher than those in other 3 groups (P0.05). Conclusion DELFI A technique is an effective method to improve the diagnosis and differential diagnosis of prostatic diseases, especially for prostate cancer.

This paper discusses the problems of optimizing teaching of medical microbiol-ogy on the aspects of optimizing teaching matters and teaching means,of integrating teaching with learning,and training teachers,etc. to improve the teaching quality in microbiology through some innovational measures.

ObjectiveTo investigate the risk factors for acute renal injury (AKI) in patients with ischemic stroke.MethodsPatients with ischemic stroke were enrolled retrospectively.The general clinical data, vascular risk factors, drug use, stroke etiological typing, stroke severity, and baseline biochemical indices were collected.They were divided into either an AKI group or a control group according to whether AKI occurred or not.Multivariable logistic regression analysis was used to analyze the independent risk factors for occurring AKI in patients with ischemic stroke.ResultsA total of 214 patients with ischemic stroke were enrolled, including 32 (14.95%) had AKI and 182 (85.05%) did not have AKI.The proportions of patients in heart failure (62.50% vs.41.21%;χ2=4.998, P=0.025), mannitol use (87.50% vs.43.96%;χ2=20.643, P<0.001), furosemide use (87.50% vs.43.96%;χ2=20.643, P<0.001), contrast agent use (37.50% vs.19.23%;χ2=5.300, P=0.021), and contrast dosage >200 ml (28.13% vs.9.89%;χ2=6.637, P=0.010), as well as NIHSS score (18.0±4.5)vs.8.0±3.2;t=15.249, P<0.001), diastolic blood pressure (89.98±9.1 mmHg vs.80.56±8.19 mmHg, 1 mmHg=0.133 kPa;t=5.898, P<0.001), fasting blood-glucose (10.54±4.31 mmol/L vs.6.32±1.32 mmol/L;t=5.898, P<0.001), blood urea nitrogen level (11.21±2.13 mmol/L vs.7.98±2.34 mmol/L;t=7.293, P<0.001), and arterial lactate concentration (3.98±0.12 mmol/L vs.0.91±0.25 mmol/L;t=68.003, P<0.001) in the AKI group were significantly higher than those in the non-AKI group.Multivariate logistic regression analysis showed that after adjusting various confounding factors, higher NIHSS score (odds ratio [OR] 1.910,95% confidence interval[CI] 1.517-6.012;P=0.024), higher diastolic pressure (OR 1.816, 95% CI 1.652-3.876;P=0.018), arterial lactate concentration (OR 1.553, 95% CI 1.256-1.763;P=0.019), mannitol use (OR 3.765, 95% CI 2.081-9.658;P=0.017), furosemide use (OR 5.329, 95% CI 3.085-8.763 P=0.010), contrast agent use (OR 2.097, 95% CI 1.364-2.456;P=0.031), and contrast dosage >200 ml (OR 3.294, 95% CI 1.464-2.786;P=0.021) were the independent risk factors for AKI in patients with acute ischemic stroke.ConclusionsThe NIHSS score, diastolic blood pressure, arterial lactate concentration,mannitol use, furosemide use, contrast agent use and contrast dosage >200 ml were associated with AKI in patients with ischemic stroke.

Objective:To compare the steam distillation( SD) and supercritical CO2 ( SFE-CO2 ) method in the extraction of vola-tile constituents from such 3 traditional Chinese drugs as cnidium monnieri, radix sileris and atractylodes lancea in compound Kuhuang prescription. Methods:Essential oil was extracted from the 3 traditional Chinese drugs by SD and SFE-CO2 method, respectively. The components were identified by GC-MS, and their relative contents were calculated with peak area normalization method. Results:To-tally 36 components were isolated and identified using SD extraction and 31 components were identified using SFE-CO2 extraction, a-mong them, 22 components were the same and their relative molecular weight mainly concentrated within 200-230. Conclusion: SFE-CO2 method can extract effective components from the 3 traditional Chinese drugs in compound Kuhuang prescription with higher selec-tivity, which is the more suitable extraction method for essential oil from the prescription.

Objective:To study the antitumor activity and immunological mechanisms of rBCG including GM-CSF and EB virus LMP2A gene fusion.Methods: Animal models of EB virus-positive tumors was built.The formation time of tumors in mice,survival time,tumor weight was analyzed to detect rBCG anti-tumor activity;ELISA method was used to detect the specific antibodies which was produced in the mice stimulated by rBCG,specific CTL killing effect was detected by lactic dehydrogenase assay,ELISPOT was used to assay the secretion of IFN-γand flow cytometry, HE staining of tumor tissue was used to detected lymphocyte infiltration in mice immunized with recombinant BCG.Statistical methods were used for rBCG immunization effect preliminary analysis and evaluation.Results:Comparing to other control,tumor formation time was significantly delayed and tumor growth was slow, survival time of mice prolonged .ELISA test results showed that the rBCG immunization groups of mice could produce specific IgG antibodies of GM-CSF and LMP2A.Specific CTL activity was detected in mice immunized with rBCG.IFN-γsecretion was detected by ELISPOT method, flow cytometry and morphological observation detected tumor tissue infiltration of lymphocytes growth in mice immunized with rBCG.Conclusion:The rBCG induced a humoral and cellular immune responses and induced C57BL/6 mice to produce a strong anti-tumor effect and the EB virus-positive tumor cells was significantly inhibited.