Diagnosis, Differential ; Diarrhea ; etiology ; Humans ; Infant ; Male ; Mediastinal Cyst ; complications ; diagnosis ; surgery ; Mediastinal Neoplasms ; complications ; diagnosis ; Respiratory Sounds ; etiology ; physiopathology ; Treatment Outcome ; X-Rays

Objective To construct the serine protease gene(sprE)mutant and to study the pathogenicity of sprE gene of Enterococcus faecalis.Methods Recombinant suicide vector pCQ001 of Enterococcus faecalis with pTX4577,was constructed.Then,created isogenic sprE-deficient mu- tant(*sprE)by allelic replacement was constructed.Moreover,the growth ability and the virulence of the mutant were compared with those of the wide type in vitro and in vivo respectively.A mouse peritonitis model and a rabbit endocarditis model were utilized in the study.Results The *sprE was selected by kanamycin and identified by polymerase chain reaction(PCR),pulsed field gel electropho- resis(PFGE)and Southern blot.The evidences showed that the sprE gene had a major role in helping bacteria to resist the elevated temperature and oxidative stress.The virulence of mutant decreased af- ter sprE gene was knocked out.Conclusions The *sprE of Enterococcus faecalis is constructed suc- cessfully,sprE gene is important in the pathogenesis of Enterococcus faecalis,which probably is a major virulence factor of Enterococcus faecali.

Brachytherapy ; adverse effects ; Female ; Humans ; Iodine Radioisotopes ; administration & dosage ; therapeutic use ; Male ; Medical Staff, Hospital ; Occupational Exposure ; analysis ; Radiation Dosage ; Radiation Monitoring

The sfa1 gene encoded a bifunctional enzyme with the activities of both alcohol dehydrogenase and glutathione-dependent formaldehyde dehydrogenase in Saccharomyces cerevisiae.The gene disruption cassette produced by PCR using the same long oligonucleotides which comprise 19 or 22 nucleotides complementary to sequences in the templates(pUG6 and pUG66 marker plasmid)at 3' end and 45 nucleotides at 5' end that annealed to sites upstream or downstream of the genomic target sequence to be deleted.After two linear disruption cassettes with a Cre/loxP mediated marker were transformed into the cells of Saccharomyces cerevisiae YS-1,the positive transformants were checked by PCR to correct the integration of the cassette and concurrent deletion of the chromosomal target sequence.Once correctly integrated into the genome,the select marker can be efficiently rescued by transformating the plasmid pSH47 into YS-1 and inducing the Cre expression with a Cre/loxP-mediated marker removal procedure.The expression of the Cre recombinase finally resulted in the removal of the marker gene,leaving behind a single loxP site at the chromosomal locus.The diploid mutant YS-1-sfa1 was generated,which could enhance the output of ethanol with 8.0% by shaking culture in flask compared with the original strain YS-1.

Objective: To obtain the bFGF mimic peptide binding to FGFR via phage display, and to provide the base for developing peptide agonist of bFGF. Methods: Using Balb/c 3T3 cells as the target cells and COS-7 cells as the subtractive panning, the phage display heptapeptide library was biopanned for 4 rounds to obtain the single phage clones. The affinity and the specificity of the clones were assessed by ELISA. DNA sequencing was applied to further analyze the positive clones. Results: Twelve positive clones were selected from the enriched phages. A group of hydrophobic peptides containing a conserved motif, PR, was identified. Conclusion: Two bFGF mimic heptapeptides binding to FGFR were selected, which may be used as the candidates for bFGF agonist.

Acupuncture Therapy ; California ; International Cooperation ; Medicine, Chinese Traditional ; methods ; trends ; United States

Analyzed the prescriptions for phlegm retention syndrome that built by Ma Peizhi by the association rules and clustering algorithm, the frequency of drug usage and the relationship between drugs could be get. And from that we could conclude the experiences for phlegm retention syndrome of Ma Peizhi of menghe medical genre. The results of the analysis were that 18 core combinations were dig out, such as Citri Exocarpium Rubrum-Eriobotryae Folium-Citri Reticulatae Pericarpium. And there were 9 new prescriptions were found out such as Aurantii Fructus-Citri Exocarpium Rubium-Eriobotryae Folium-Citri Reticulatae Pericarpium. The results of the analysis were proved that Ma Peizhi of Menghe Medical Genre was good at curing phlegm retention syndrome by using the traditional Chinese medicine of mild and light, such as the medicines of mild tonification, and clearing damp and promoting diuresis.
Algorithms ; Data Mining ; Databases, Factual ; Drug Prescriptions ; standards ; Drugs, Chinese Herbal ; therapeutic use ; Humans ; Mucus ; chemistry ; Practice Patterns, Physicians' ; Respiratory Tract Diseases ; drug therapy

The clinical prescriptions of hemoptysis that built by Menghe physician Ma Peizhi were collected, and were analyzed by the method of unsupervised data mining, such as association rules and clustering algorithm. From the prescriptions, we got the frequency of drugs, the association rules among drugs, 10 core drug combinations and 5 new prescriptions. Accordingly, after the analysis, Menghe physician Ma Peizhi had rich experience in the treatment of hemoptysis. His therapy for hemoptysis was clearing heat and moistening lung, dispel heat from blood to stop bleeding, and enriching yin and blood. And we can also make a conclusion that the TCM inheritance support system is of great practical value for minning the old doctors' clinical experiences.
Data Mining ; Databases, Factual ; Drug Prescriptions ; standards ; Drugs, Chinese Herbal ; chemistry ; therapeutic use ; Hemoptysis ; drug therapy ; Humans ; Practice Patterns, Physicians'

Objective To investigate the clinical effect of IFNα combined with mannan peptide in treatment of patients with HBeAg-positive chronic hepatitis B ( CHB ). Methods Eighty HBeAg-positive CHB patients with HBV DNA quantity ranging from 10 to 10 eopies/mL were enrolled and randomized into the treatment group and the control group ( n = 40 for each ). Patients in treatment group were given daily subcutaneous injection of IFNα-2b 5,000,000 U for 52 weeks, and received mannan peptide 10 mg per intravenous injection or 2. 5 mg per intramuscular injection for a total of 2 to 3 treatment courses (12 weeks for each). The control group received only IFNα-2b treatment. Liver function, serum markers of hepatitis B, HBV DNA quantity and blood tests were performed before the treatment and at 2, 4, 8, 16, 26 and 52-week during the treatment; and the adverse effects were recorded. Results The rates for ALT normalization, negative HBsAg, negative HBeAg, HBeAg seroconversion and negative HBV DNA were 91. 8% , 17. 5% , 52. 5% , 27. 5 % and 47. 5% at 52nd week in the treatment group, while those in the control group were 80. 0% , 12. 5% , 30. 0% , 10. 0 % and 25. 0% , respectively. There were significant differences in HBeAg-negative, HBeAg-seroeonversion and HBV DNA-negative rates between two groups (χ2 = 4. 178, 4.021 and 4.381, P < 0. 05 ) , and these indexes in the treatment group were increased to 57. 5% , 30. 0% and 50. 0 respectively at 52nd week after drug withdraw. White blood cells began to be elevated at 4th week and were restored to the normal levels at 8th week in the treatment group, while the count in the control was lower than the normal value even at 52nd week of the treatment with the average of (3.45±1. 18)×109/L. Conclusion Alpha-interferon combined with mannan peptide therapy is effective for patients with HBeAg-positive CHB, which may restore the declined peripheral WBC counts induced by interferon and improve the compliance.

Objective To construct a recombinant expressing plasmid of the hy1 gene of Enterococcus faecium and to express the recombinant Hy1 protein in E.coil.To explore the immune response in mice fed orally with Hyl protein.Methods hy1 gene was amplified by polymerase chain reaction(PCR)and inserted into a prokaryotic expression vector pQE-30.The recomhinant plasmids were transfected into DH5_?to express Hy1 fusion proteins,which were purified by Ni~--column. Western blot was employed to confirm the immunogenicity of the purified protein.Mice were immu- nized by feeding with the fusion protein.The concentrations of antigen-specific antibody in the serum, mucosal fluid and faces were detected by enzyme-linked immunosorbent assay(ELISA).The role of these antibodies in the anti-infection response was evaluated after the mice were challenged with TX0016.Results hy1 gene was sequenced as 1662 bp,the fusion protein encoding polypeptides of 553 amino acid residues.The relative molecular weight was 60 000 when it was determined by sodium dodecylsulfatepo-lyacry-lamide gel electropboresis(SDS-PAGE).The dissolvable expression protein accounted for 38% of total cell protein.After processed by affinity chromatography,the purity of fusion protein was above 92%.Western blot analysis confirmed that fusion protein could be specifically recognized by the anti-TX0016 serum.The concentrations of serum IgA,serum IgG,faeces sIgA and intestmucosal fluid sIgA was 0.365?0.048,0.431?0.064,0.743?0.056 and 1.112?0.113 respectively in hy1 groups and 0.051?0.013,0.098?0.019,0.102?0.032 and 0.187?0.051 respectively in control group.The differences were statistically significant.The mice survival rate after TX0016 challenge was 70% in hyl group and 50% in control group.There was significant difference between these two groups.Conclusion The results indicate that oral immunization with hyl can induce effective mueosal immune response and produce high level sIgA.