To discuss the protective effect of aralosides (AS) on I/R-induced rat myocardial injury. The adult rat ventricular myocyte ischemia model was established through perfusion with sodium lactate perfusate and reperfusion with Ca(2+) -containing Tyrode's solution simulation. The cell contraction and ion concentration synchronization determination system was applied to detect the effect of AS on single I/R cell contraction and Ca2+ transients. According to the findings, AS could increase resting sarcomere length, contraction amplitude, ± dL/dt(max), calcium transient amplitude and speed of post-reperfusion myocardial cells (P < 0.05, P < 0.01), and decrease in time for achieving 90.0% of maximum relaxation, time for achieving peak value, resting calcium ratio, contraction period [Ca2+] i, time for achieving 50.0% of maximum relaxation and attenuation rate of intracellular calcium transient (P < 0.05, P < 0.01). Therefore, it is suggested that AS improved the post-reperfusion cell contraction and injury of calcium homeostasis.
Animals ; Aralia ; chemistry ; Biological Transport ; drug effects ; Calcium ; metabolism ; Drugs, Chinese Herbal ; administration & dosage ; Humans ; Male ; Muscle Contraction ; drug effects ; Myocardial Ischemia ; drug therapy ; metabolism ; physiopathology ; surgery ; Myocardial Reperfusion ; Myocytes, Cardiac ; drug effects ; physiology ; Rats ; Rats, Sprague-Dawley ; Saponins ; administration & dosage

Objective Our purpose was to evaluate the teaching satisfaction of clinical epi-demiology among medical postgraduate and to come up with measures for further improvement of teaching quality. Methods A self-administered questionnalre was given to all the medical postgradu-ates and doctoral students of Grade 2013 by cluster sampling when they finished the course of clinical epidemiology. A total of 559 graduate students, including 324 graduate students (58%), 235 doctoral students (42%), recruitment graduate students 350 (62.6%), on-the-job graduate student 209 (37.4%).The contents of the questionnalre included many aspects such as the investigation object in general, teaching materials evaluation satisfaction, curriculum and teacher satisfaction evaluation. Respondents ' self-administered manner was adopted. Parallel input was done by using Epidata software; data were analyzed with SPSS 19.0 software, continuous variable was made by x±s, categorical variables was expressed by n(%). Continuous variables were compared among groups by t test and analysis of vari-ance. Classification grouping variable was compared by chi-square test, and P<0.05 for the difference was statistically significant . Results Overall evaluation of theory was below that of the internship teaching materials. The satisfaction rate of practicability, meeting the learning needs and difficulty degree for theory and practice teaching material were 83.7% (468/559), 87.5% (489/559), 67.1% (375/559) and 92.7%(518/559), 89.6%(501/559), 83.0%(464/559) respectively. 41.6%(87/209) of on-the-job students and 36.7% (119/324) of postgraduates considered theory teaching material was difficult for them. The satisfaction rate for faculty teaching attitude (99.5%, 556/559), faculty teaching method (98.6%,551/559), the theories combining with practice teaching method (97.5%, 545/559) were high, but the satisfaction rate for teaching hours was low (67.4%, 377/559), with one third students consider more hours for the course. Conclusion The Teaching effect of clinical epidemiology is falrly good in our school. The postgraduates are satisfied with the teaching materials, curriculum setting, and teach-ing faculty. But there are also some shortcomings. In the future teaching work, we should appropriately increase the hours, and set corresponding teaching contents and methods according to the different learning characteristics of the on-the-job graduate students and recruitment graduate students, to improve the teaching effect and teaching quality.

AIM: To observe the effect of Xiaoyu Huatan Decoction on the nonalchoholic fatty liver tissue peroxisome preliferator-activated receptor?(PPAR?) expression. METHODS: The nonalchoholic fatty liver disease rat model was fed by high fat forage and the rats were divided into five groups: normal control group,model control group,high-dose of Xiaoyu Huatan Decoction group,low-dose of Xiaoyu Huatan Decoction group,Dongbao Gantai control group.Total RNA of liver was extracted,and the expression of PPAR?mRNA was analyzed by semi-quantitative RT-PCR method.We determined the contents of total cholesterol(TC),triglyceride(TG),free ratty acid(FFA) in serum and the TC,TG in liver tissue homogenate of each group,and the degree of hepatocytic steatosis. RESULTS: Expression of liver tissue PPAR? mRNA in the model group decreased significantly,lipid in blood serum and hepatic tissues increased significantly,liver fat cell greatly denaturalized.After the intervention of medicine,expression of liver tissue PPAR? mRNA of each treatment group increased significantly,lipid in blood serum and hepatic tissues decreased significantly,liver fat cell denaturation was improved. CONCLUSION: Xiaoyu Huatan Decoction can increase the expression of liver tissue PPAR?mRNA of rats,It is likely to be one of the important mechanism for treating fatty liver.

Abstract: This study is to improve the affinity of scFv-AK404R against VEGFR2. The secondary mutational library was constructed by hydrophilic shuffling in CDR3 region of the heavy chain. VEGFR2-specific screening was performed by phage display technology and the protein of mutants was expressed in periplasm of E.coli HB2151 and purified by affinity chromatography. The affinity constant of scFvs was measured by competitive ELISA, and the structure of scFvs was analyzed by bioinformatics. The result showed that a library with 6.4x10(5) scFv members was established by electro-transformation. Two mutated clones with high absorbance value were isolated after screening. After purification by affinity chromatography, electrophoretically pure scFv proteins were obtained. The competitive ELISA showed that the affinities of WZ01 and WZ02 were three times higher than that of the parental AK404R, and bioinformatics analysis showed that the enlarged contact surface and fitted closely with KDR3 surface may be the reasons for improved affinity. These results suggest that introducing hydrophilic amino acids to the heavy chain CDR3 region is an effective approach to improve the affinity of scFv.
Amino Acid Sequence ; Antibody Affinity ; Chromatography, Affinity ; Computational Biology ; Enzyme-Linked Immunosorbent Assay ; Escherichia coli ; metabolism ; Hydrophobic and Hydrophilic Interactions ; Peptide Library ; Single-Chain Antibodies ; genetics ; immunology ; isolation & purification ; Vascular Endothelial Growth Factor Receptor-2 ; genetics ; immunology ; metabolism

Gene Expression Profiling ; Humans ; Killer Cells, Natural ; pathology ; Lymphoma, T-Cell ; genetics ; metabolism ; pathology ; Nose Neoplasms ; genetics ; metabolism ; pathology ; Oligonucleotide Array Sequence Analysis ; Protein Tyrosine Phosphatase, Non-Receptor Type 6 ; biosynthesis ; genetics ; RNA, Messenger ; biosynthesis ; genetics

Amino Acid Sequence ; Autophagy ; Binding Sites ; Genomics ; Molecular Sequence Data ; Phosphorylation ; Saccharomyces cerevisiae Proteins ; chemistry ; genetics ; metabolism

OBJECTIVE: To resolve the problem of the accuracy and standardization of STR-PCR typing in forensic practice, we have designed a new method to produce standard D1S549 allelic ladder. METHODS: Eight different PCR amplified D1S549 allelic fragments were isolated from the gel, eluted into the distilled water and re-amplified by PCR. The purified allelic fragments were then blunt-end subcloned individually into the pUC plasmid vectors and transfected into competent E. coli DH5 alpha cells. RESULTS: The sequencing results confirmed that the size and the construe of the inserts were correct. The recombinant plasmids DNA with 8 inserts were then used as templates for re-amplification to generate D1S549 standard ladder, with which the genetic polymorphisms of D1S549 locus in Chinese Han population in chengdu, Hui population in Gansu and Wei population in Xinjiang were studied. CONCLUSION The results showed that the standard ladder made via this method is excellent, and D1S549 locus is robust for genetic research and forensic application.
Alleles ; China ; Cloning, Molecular ; Forensic Medicine ; Gene Frequency ; Genetics, Population ; Humans ; Polymerase Chain Reaction ; Polymorphism, Genetic ; Tandem Repeat Sequences/genetics*

Two Rotavirus G9P[8] strains (LL52696 and LL52727) were recognized during a sentinel-based survey in Lulong, China. Phylogenetic analysis of the VP7 gene showed that both strains isolated constituted a divergent genetic cluster distinct from the other G9 strains isolated in China. Analysis of VP4, VP6, and NSP4 genes revealed that these strains were closely related to Lulong strains. We hold that two strains were reassortant between G9 and Lulong predominant strains.
Amino Acid Sequence ; Antigens, Viral ; chemistry ; genetics ; Base Sequence ; Capsid Proteins ; chemistry ; genetics ; Glycoproteins ; chemistry ; genetics ; Humans ; Phylogeny ; Rotavirus ; classification ; genetics ; Toxins, Biological ; chemistry ; genetics ; Viral Nonstructural Proteins ; chemistry ; genetics

OBJECTIVETo detect human parechovirus (HPeV) from stool samples of hospitalized children for acute gastroenteritis of undetectable etiology.

METHODSWe conducted a real-time PCR to detect HPeV.

RESULTThe results showed that 24 of 99 (24%) children with gastroenteritis of undetectable etiology were detected with HPeV. Four known HPeV types (HPeV1, 3, 4, 6) were detected in the present study. HPeV1 (50%) was frequently identified as the predominant strain and follow by HPeV3 (25%), HPeV4 (8.3%) and HPeV6 (4.2%). We were unable to type 3 samples.

CONCLUSIONHPeV was prevalent in hospitalized children for acute gastroenteritis of undetectable etiology in China. Further study is needed for clarifying the role of HPeV in gastroenteritis.

Child, Preschool ; Feces ; virology ; Female ; Gastroenteritis ; virology ; Humans ; Infant ; Infant, Newborn ; Male ; Molecular Sequence Data ; Parechovirus ; classification ; genetics ; isolation & purification ; Phylogeny ; Picornaviridae Infections ; virology

Objective To analyze the differences in the expression levels of the lncRNA MALAT1, NEAT, NEAT2 in peripheral blood mononuclear cell (PBMC) from tuberculosis patients and healthy controls. Methods We detected the lncRNA expression levels in PBMC from 79 tuberculosis patients and 82 healthy controls by quantitative reverse transcription polymerase chain reaction, and analyzed the correlation between lncRNA expression levels and some clinical features and laboratory indicators in tuberculosis patients. Results The expression levels of MALAT1, NEAT1 in PBMC of tuberculosis patients were significantly higher than healthy controls (Z=-4.386, P<0.001; Z=-10.175, P<0.001). There was no significant difference in the expression of NEAT2 between tuberculosis patients and healthy controls (Z=-0.203，P=0.839). The correlation results of lncRNA levels and some clinical features, laboratory indicators in tuberculosis patients suggested that the NEAT2 level in PBMC of newly treated tuberculosis patients was higher than recurrent tuberculosis patients, while the NEAT2 level in PBMC of sputum smear positive tuberculosis patients was lower than that of sputum smear negative tuberculosis patients (all P<0.05). There was a negative correlation between MALAT1 level and erythrocyte sedimentation rate (rs=-0.256, P=0.034). Conclusion MALAT1 and NEAT1 are abnormally expressed in PBMC of tuberculosis patients, and may be involved in the pathogenesis of pulmonary tuberculosis.