Objective To understand websites of public hospitals in China.Methods Website search and appraisal were called into play to analyze the percentage and present conditions of websites built by public hospitals in Shanghai,Hubei Province and Gansu Province.Rusults The study found websites in less than 55％ of the public hospitals in these three areas.Those websites in operation provide instant information on hospitals and medical services,yet their online service functions are less satisfactory and website levels vary sharply.Conclusion The authors recommend the Chinese government encourage public hospitals to build websites and enhance their online services.

AIMTo study the protective effect and mechanism of osthol on learning and memory impairment of mice with acute senile model induced by AlCl3.

METHODSAfter s.c. AlCl3 60 mg.kg-1 for 7 d and i.p. osthol 15 and 7.5 mg.kg-1 for 12 d, using step-through test and step-down test, the effect of osthol on learning and memory was observed and the glutathione peroxidase (GSH-PX) activities in blood and superoxide dismutase (SOD) activities in plasma and cerebrum were measured.

RESULTSOsthol 15 and 7.5 mg.kg-1 significantly improved the capability of memory and enhanced the activities of GSH-PX and SOD in AlCl3 treated mice.

CONCLUSIONOsthol shows protective effect on brain memory impairment of mice in acute senile model induced by AlCl3. Perhaps the mechanism is involved in enhancing the activities of GSH-PX and SOD, clearing away the free radical, protecting the brain neuron from the harm of lipoperoxide.

Acute-Phase Reaction ; Aging ; drug effects ; metabolism ; Aluminum Compounds ; pharmacology ; Animals ; Avoidance Learning ; drug effects ; Brain ; enzymology ; Chlorides ; pharmacology ; Cnidium ; chemistry ; Coumarins ; isolation & purification ; pharmacology ; therapeutic use ; Female ; Glutathione Peroxidase ; blood ; Male ; Memory Disorders ; chemically induced ; enzymology ; prevention & control ; Mice ; Plants, Medicinal ; chemistry ; Random Allocation ; Superoxide Dismutase ; metabolism

OBJECTIVETo construct the recombinant plasmid of RCAS1, to express and purify its fusion protein GST-RCAS1, and to investigate its biological function.

METHODSRCAS1 encoding gene was amplified by RT-PCR from total RNA extract of MCF-7 cells and was ligated with expression plasmid vector pGEX-2T by T4 DNA ligase after digested by the restricted endonucleases BamH I and EcoR I. Then the ligated products were inserted into competence JM109 E. Coli and the positive recombinants were identified by restriction endonuclease digestion assay and DNA sequencing. The GST-RCAS1 fusion protein expression was induced by IPTG in BL21 E. Coli and was purified with GST column and identified by SDS-PAGE and Western blotting with anti-GST monoclonal antibody, anti-RCAS1 (N-18) and anti-RCAS1 (C-20) polyclonal antibody. The apoptosis of activated T cells induced by GST-RCAS1 fusion protein was detected by flow cytometry with Annexin V and propidium iodide (PI) staining.

RESULTA 642 bp product was cloned by RT-PCR and the recombinant plasmid was constructed successfully. The GST-RCAS1 fusion protein was recognized by GST monoclonal antibody and RCAS1(N-18 and C-20) polyclonal antibody. FACS analysis showed that GST-RCAS1 fusion protein induced apoptosis in activated T cells.

CONCLUSIONThe recombinant plasmid of RCAS1 has been successfully constructed and the GST-RCAS1 fusion protein expressed and purified. The apoptosis inducing effect of GST-RCAS1 fusion protein on activated T cells is demonstrated.

Antigens, Neoplasm ; biosynthesis ; genetics ; Base Sequence ; Breast Neoplasms ; genetics ; immunology ; Escherichia coli ; genetics ; metabolism ; Gene Expression ; Glutathione Transferase ; biosynthesis ; genetics ; Humans ; Molecular Sequence Data ; Plasmids ; genetics ; Recombinant Fusion Proteins ; biosynthesis ; isolation & purification ; Tumor Cells, Cultured

Humans ; Lead ; toxicity ; Male ; Reproduction ; drug effects ; Sperm Count ; Sperm Motility ; drug effects

Objective To investigate the relationship between parvovirus B19 infection and systemic lupus erythematosus(SLE).Methods Sera from 51 patients with SLE and 20 normal controls were exam- ined for IgG and IgM antibodies against parvovirus BI9 by ELISA(produced by IBL Hamburg Company, Germany).Results Anti-Bl9 antibodies were found more frequently in sera from SLE patients than in normal controls,IgM and [gG antibodies were detected in 11(17.65%)and 9(21.57%)of 51 SLE pa- tients respectively.It was observed that the SLEDAI scores were higher in patients with B19 IgM positive group than those of the negative group(P＜0.05).The sera levels of ALT/AST were elevated more frequently in patients with BI9 IgM positive group than in negative group(P＜0.05).However,there was no association between the presence of anti-IgM and clinical manifestations in patients with SLE(P＞0.05).Five SLE pa- tients with positive B19 IgM were followed up for 2 years.SLEDA1 scores of these patients were markedly decreased(P＜0.05),but the levels of auto-antibodis(ANA,dsDNA)didn't change(P＞0.05).And the levels of ALT/AST decreased as usual.Conclusions It is suggested that parvovirus B19 infection may ex- acerbate the onset of SLE,but we eould not find a correlation between parvovirus B19 infection and prog- nosis of the disease.

There are abundant of lignocelluloses in agricultural wastes. And it can provide a variety of sugars involve pentose and hexose through pretreatments or hydrolyzation of these lignocelluloses. This review summarized the current status of bioethanol production by bacteria, and compared the productivity of some kinds of ethanologenic bacteria such as recombinant Zymomonas mobilis and Escherichia coli.

Objective To investigate the clinical value , the motive regularity, the temporal and spatial correlation between myocardium and adjacent pericardium of left ventricular short -axis in normal adsults by using dual pulse wave Doppler echocardiography .Methods Tissue dual pulse spectral Doppler images about segmental myocardium and adjacent pericardial of three complete cardiac cycles in 99 normal adults were collected synchronously by using dual pulse wave Doppler techenology ,6 segments were enrolled in this study, including the anterior and posterior wall at mitral valve , papillary muscles, and apex level of left ventricular short-axis view.The motive regularity of myocardium and adjacent pericardium at different levels and segments were observed .Peak speed, onset time and peak time between myocardium and adjacent pericardium in anterior and posterior wall of three valves were measured online in systolic , early diastolic, and late diastolic, and the correlation between segmental myocardium and adjacent pericardium in speed and time were analyzed.Results Dual pulse wave Doppler echocardiography showed that in left ventricular short-axis view, motion between myocardium and adjacent pericardium in the same segment had consistent direction, motions between myocardium and adjacent pericardium in anterior and posterior wall at the same level had opposite directions .Comparison of peak velocity, in anterior wall, the peak velocities of myocardium in systolic and late diastolic at mitral valve level , and the peak velocity of myocardium in systolic at papillary muscle level were lower than that of adjacent pericardium .In posterior wall, the peak velocities of myocardium in early diastolic and late diastolic at mitral valve level , the peak velocities of myocardium in systolic and early diastolic at papillary muscle level , and the peak velocity of myocardium in early diastolic at apex level were higher than that of adjacent pericardium , with statistical significance (t=-4.207, -2.078, 4.575, -2.277, -2.440, -2.292, 5.980, 2.604, all P<0.05).Comparison of onset time, the onset time of myocardium in systolic at papillary muscle level in anterior wall , and the onset time of myocardium in early diastolic at mitral valve level in posterior wall were lower than that of adjacent pericardium, with statistical significance (t =-2.447, -2.020, both P<0.05).Comparison of peak time, except the peak time of myocardium in systolic and early diastolic at mitral valve level in posterior wall was lower than that of adjacent pericardium , the remaining differences were statistically significant ( t =-3.530, -2.411, both P<0.05).Peak velocity, onset times and peak times of each segment measured between myocardium and adjacent pericardium were well correlated (r =0.407 -0.933, all P <0.01). Conclusions Dual pulse wave Doppler echocardiography can provide relativity and accordance between motive velocity and direction of left ventricular myocardium and adjacent pericardium in normal adults .It is a promising new method for the clinical diagnosis of constrictive pericarditis and differentiation with restrictive cardiomyopathy.

Objective To evaluate the effects of a health education project on endemic fluorosis in Shandong Province,and to provide a basis for formulating control strategies.Methods From December 2010 to June 2011,according to historical conditions,a total of 19 counties (cities,districts) of Shandong Province were chosen,and 3 townships (towns) were chosen in each project county.Health educational activities on endemic fluorosis were carried out in the Central Primary School in grade 4 to 6 in each township(town).In each project township(town),3 villages were chosen in each selected township(town) where the health educational activities in the community were carried out.Before and after the health educational activities,surveys on knowledge questionnaire on drinking-water-borne fluorosis control were conducted among 30 students of grade 5 in the Central Primary School and 15 housewives in every school location in each selected township(town).Results After the health educational activities,the knowledge awareness rates of endemic fluorosis control of the students and housewives were 96.53％ (5482/5679) and 94.88％ (3501/3690),respectively,and increased significantly compared with those before intervention [62.31％ (5154/8271) and 76.91％ (2815/3660)],and the difference was statistically significant (x2 =2176.50,490.58,all P ＜ 0.01).Among the primary school students and housewives,the knowledge awareness rates of endemic fluorosis control were increased by 34.22％ and 17.97％,respectively.Conclusions Health education activities on endemic fluorosis can significantly improve the knowledge awareness of target population,which will play a positive role in promoting prevention and control of endemic fluorosis.

Objective During pregnancy , exosomes can be released from the placenta into maternal circulation and play im-portant roles in normal pregnancy or placenta-related diseases .We aimed to establish a simple and efficient method for isolating and i-dentifying placental exosomes from maternal serum and lay a foundation for the studies of pregnancy -related diseases . Methods Using sucrose gradient centrifugation with 8% PEG6000 precipitation twice , we isolated and purified placenta-derived exosomes from normal maternal serum and detected their molecular markers CD 63 , CD81 and PLAP by Western blot , followed by silver staining anal-ysis of the protein profile of the exosome pellet .We identified the morphology of the placenta-derived exosomes by transmission electron microscopy ( TEM) and measured the size and distribution of the particles by dynamic light scattering ( DLS) . Results Silver stai-ning of the protein profiles of the exosomes after sucrose gradient centrifugation clearly revealed the bands of the protein molecules . Western blot showed the expressions of CD 63, CD81, and PLAP in the 21-34%density layer, which demonstrated the presence of serum placental exosomes mainly in the 1.09-1.16 g/mL density layer.TEM exhibited that the placenta-derived exosomes were round or oval cup-shaped, specifically expressing PLAP, and the particles were uniform in size, with a mean diameter of (41.79 ±11.94) nm. Conclusion A simple, fast, and efficient method was successfully established for isolating placenta-derived exosomes from ma-ternal serum, which provides a basis for studying the roles of placental exosomes in normal pregnancy and placenta -related diseases.