Japanese encephalitis virus (JEV) is a pathogenic mosquito-borne flavivirus which is responsible for outbreaks of severe viral encephalitis. The cellular entry of JEV is a prerequisite for Japanese encephalitis, so the understanding of its underlying mechanisms will provide more approaches for treating such disease. In recent years, increasing research has been conducted to investigate the mechanisms of cellular entry of JEV, and the results of research on other flavivirus have expanded the research directions for JEV. More methods will be used to suppress JEV infection because of the development of E protein antibodies and the discovery of several inhibitors of the cellular entry process. This review will summarize the recent advances in the mechanisms of JEV cellular entry and membrane fusion.
Animals ; Biomedical Research ; trends ; Encephalitis Virus, Japanese ; genetics ; physiology ; Encephalitis, Japanese ; virology ; Humans ; Virus Internalization

OBJECTIVETo evaluate the effect of Shexiang Baoxin Pill (SBP) on coronary vasodilation by analysis of coronary angiography (CAG).

METHODSA consecutive cohort of 300 patients who underwent CAG between January 2013 and July 2013 were recruited and randomly assigned to 2 groups before operation. Patients in the SBP group sublingually took SBP, while those in the control group sublingually took placebos. All patients repeatedly underwent CAG 5 min after administration. The vascular diameter was calculated by quantitative angiography analysis method. The diameter of the left anterior descending coronary artery was measured in patients whose coronary arteries had no stenosis. The narrowest vascular diameter was measured in patients whose coronary arteries had stenosis. The heart rate, blood pressure, and the vascular diameter were compared between before and after administration in the two groups.

RESULTSIn the two groups, there was no significant difference in changes of heart rate, systolic pressure, or diastolic pressure between before and after administration (all P > 0.05). There were 64 patients with normal CAG in the two groups, 30 in the control group and 34 in the SBP group. CAG showed there were 236 patients with stenotic coronary artery, 110 in the control group and 126 in the SBP group. The vascular diameter was obviously larger in patients in the SBP group with normal or abnormal CAG after administration (all P < 0.01). It was also obviously larger than that of the control group after administration (P < 0.05, P < 0.01).

CONCLUSIONSBP could dilate both normal coronary artery and lesioned coronary arteries, but did not lead to fastened heart rate and decreased blood pressure.

Blood Pressure ; Coronary Angiography ; Coronary Vessels ; drug effects ; Drugs, Chinese Herbal ; administration & dosage ; pharmacology ; therapeutic use ; Heart Rate ; Humans ; Tablets ; Vasodilation ; drug effects

Objective To investigate the changes in the metabolism of neurotransmitters in different regions of the brain induced by propofol in healthy volunteers using the proton magnetic resonance spectroscopy (MRS) technology.Methods IH-MRS was performed in ten 20-40 year old healthy volunteers. Each volunteer underwent MRS scan twice. The first MRS scan was performed when they were conscious as baseline control value. The second scan was performed during target-controlled infusion (TCI) of propofol. The target effect-site concentration was set at 3.0 ?g?ml-1. Volume of interest (VOI) included sensory cortex, motor cortex, thalamus, hippocampus and basal ganglia. The metabolites in the spectra included N-acetyl-aspartic acid (NAA), glutamic acid (Glu), GABA, choline compounds (Cho) and creatine (Cr) .Results During TCI of propofol MAP and RR were significantly decreased ( P 0.05) as compared to the baseline value when the volunteers were conscious. During TCI of propofol the NAA content in thalamus and hippocampus, Glu content in thalamus, hippocampus and basal ganglia and Cho content in all the 5 regions of the brain were significantly decreased ( P

Methyl parathion hydrolase (MPH, E.C.3.1.8.1) coding gene mph from Pseudomonas sp. WBC-3, isolated and identified by our lab, was successfully expressed in E. coli AD494 (DE3)/ pET32a(+) system as soluble fusion form at high level. The recombinant MPH showed nearly 4～5 fold higher specific activity to parathion than the enzyme from Pseudomonas sp. WBC-3. In addition, the thermal stability of the recombinant enzyme was improved comparing with the wild type enzyme.

G,the noval insertion mutation of c.2298_2299insC is identified in Chinese patients.

Objective To explore the effect of fluoride and arsenic pollution on bone metabolism in exposed population. Methods One hundred and fifty-two fluoride and arsenic exposed people were selected from Jiaole village, Yuzhang town, Xingron county, Guizhou province in 2006, and 59 not exposed people from Daguoduo village 13 km away from Jiaole village were selected as control. Urinary fluorine(UF), urinary arsenic (UAs), urinary hydroxyproline (UHYP), cross-linked N-telopeptides of type I collagen (UNTX) and bone strength index(STI) were detected. Results The main effect of fluoride on UHYP and UNTX were statistically significant (F = 9.785, 4.225, P < 0.01 ), but was not significant on STI(F = 0.183, P > 0.05). The main effect of arsenic on UNTX was statistically significant (F = 2.660, P < 0.05 ), but was not significant on UHYP and STI(F = 2.012, 0.183,all P > 0.05). The interaction between fluoride and arsenic on UNTX was statistically significant (F= 2.429, P <0.01), but was not significant on UHYP and STI(F= 1.218, 1.001, all P> 0.05). Conclusions Fluoride exposure can affect the metabolism of collagen and bone resorption, and Arsenic exposure main affect bone resorption, fluoride and arsenic co-exposure have more significant effect on bone resorption. UNTX may be used as biological biomarker of bone metabolism for population co-exposed to fluoride and arsenic in health monitoring.

AlM: To investigate the relationship between the anterior ischemic optic neuropathy ( AlON ) and the carotid artery change using doppler ultrasound.METHODS:Fifty-four cases of AlON patients and 54 cases of healthy control were observed, atherosclerotic spots were detected by the application of color ultrasound.RESULTS:ln AlON group of 54 patients, 38 cases appeared carotid atherosclerosis, accounting for 70%. The number of cases with hard plaque, soft plaque and mixed plaques were 18, 13, and 7 respectively, accounting for 33%, 24% and 13%. ln the control group, 20 cases were detected atherosclerotic change, accounting for 37%. And the number of cases with hard plaque, soft plaque and mixed plaques were 12, 5 and 3 respectively, accounting for 22%, 9%, 6%. Significant stenosis and velocity change were showed in neither AlON group nor control group. Compared with the control group, AlON group had more cases of atherosclerotic plaque, the difference was statistically significant (χ2=12. 836, P=0. 005)CONCLUSlON: The incidence of AlON is correlated with carotid atherosclerosis, and carotid ultrasonography is significantly valuable for AlON etiology and diagnosis.

OBJECTIVETo investigate the effect of Syk on the VEGF-C expression in breast cancer.

METHODSImmunohistochemical EnVision method was used to detect the protein expression of Syk, NFκB and VEGF-C in breast carcinoma; and the relationship between protein expression of Syk, NFκB, VEGF-C and lymph node metastasis was analysed. MDA-MB-231 cells were transfected with pcDNA3.1(-)-Syk, and the effect of Syk gene on the VEGF-C and NFκB expression was determined.

RESULTSIn the lymph node metastatic group, a lower expression rate of Syk and higher expression rate of VEGF-C and NFκB were detected as compared to the non-metastatic group. The expression of Syk was negatively associated with NFκB (r = -0.448, P = 0.002) and VEGF-C (r = -0.620, P = 0.000) expression, and VEGF-C was associated with the nuclear expression of NFκB (r = 0.310, P = 0.036). Compared with the non-transfected cells, the pcDNA3.1(-)-Syk transfected MDA-MB-231 cells showed significantly lower transcriptional level of VEGF-C mRNA, expression level of VEGF-C protein and NFκB activity (P < 0.05).

CONCLUSIONSSyk may play an important role in the lymph node metastasis of breast cancer. It may down-regulate the expression of VEGF-C by inhibiting the activity of NFκB, which thus suppresses lymph node metastasis of breast cancer.

Adult ; Aged ; Breast Neoplasms ; genetics ; metabolism ; pathology ; Carcinoma, Ductal, Breast ; genetics ; metabolism ; pathology ; Carcinoma, Lobular ; genetics ; metabolism ; pathology ; Carcinoma, Medullary ; genetics ; metabolism ; pathology ; Cell Line, Tumor ; Female ; Genetic Vectors ; Humans ; Intracellular Signaling Peptides and Proteins ; genetics ; metabolism ; physiology ; Lymphatic Metastasis ; Middle Aged ; NF-kappa B ; metabolism ; Plasmids ; Protein-Tyrosine Kinases ; genetics ; metabolism ; physiology ; RNA, Messenger ; metabolism ; Syk Kinase ; Transfection ; Vascular Endothelial Growth Factor C ; genetics ; metabolism

The marine biological source of mineral drugs recorded in Chinese Pharmacopoeia (2010 version) mainly including pearl, nacre, clam shell, common oyster shell, ark shell, cuttle bone, and sea-ear shell are widely used in clinical. Calcium carbonate and a small amount of protein are the main components in this type of drugs. In this paper, a systematical and comparable study were carried out by determination of calcium carbonate by EDTA titration method, the crystal of calcium carbonate by X-Ray powder diffraction and the total amino acids (TAAs) of the hydrolyzed samples by ultraviolet spectrophotometry method. As a result, the crystal structure is calcite for common oyster shell, mixture of calcite and aragonite for nacre and sea-ear shell, aragonite for the other drugs. The content of calcium carbonate ranged from 86% to 96%. Cuttle bone has the highest amount of TAAs among the seven drugs which reached 1.7% while clam shell has the lowest content of 0.16% on average. In conclusion, an effective method was developed for the quality control of marine mineral drugs by comprehensive analysis of calcium carbonate and TAAs in the seven marine mineral drugs.
Amino Acids ; analysis ; chemistry ; Animal Shells ; chemistry ; Animals ; Calcium Carbonate ; analysis ; chemistry ; Crystallization ; Edetic Acid ; chemistry ; Mollusca ; chemistry ; classification ; Pharmaceutical Preparations ; analysis ; chemistry ; standards ; Quality Control ; Reproducibility of Results ; Seawater ; Species Specificity ; Spectrophotometry, Ultraviolet ; X-Ray Diffraction

Breast Neoplasms ; genetics ; Disease Susceptibility ; Female ; Genes, BRCA1 ; Genes, BRCA2 ; Humans ; Mutation ; Ovarian Neoplasms ; genetics