Objective: To explore the relationship among advancod aged hypertension,unstable angina pectoris (UAP)and high homocysteine (Hcy)level.Methods:A total of 208 advanced aged patients with hypertension and angina pectoris,who were diagnosed and treated in our department of cardiology,were divided into H-type hyper-tension group (n=102)and general hypertension group (n=106).Each group was further divided into UAP sub-group and stable angina pectoris (SAP)subgroup.Levels of Hcy,blood glucose,total cholesterol (TC),high densi-ty lipoprotein cholesterol (HDL-C)and triglyceride (TG)were measured;Gensini scoring system was used to score extent of coronary artery lesion in these patients.Results:Compared with general hypertension group,there were significant rise in incidence rate of UAP (25.47% vs.46.08%)and Gensini score [(30.2±15.6)scores vs.(46.1 ±18.7)scores]in H-type hypertension group,P <0.05;in H-type hypertension group,Hcy level in UAP subgroup was significantly higher than that of SAP subgroup [(22.8±7.2)μmol/L vs.(13.1±2.7)μmol/L],and percent-age of paitents with high Hcy level in UAP group was significantly higher than that of SAP group,P <0.05 all;in general hypertension group,compared with SAP group,there were significant rise in levels of Hcy [(7.1 ± 1.5)μmol/L vs.(9.2±2.8)μmol/L]in UAP group,P <0.05 ;Logistic regression analysis indicated that for advanced aged UAP patients,Hcy is an independent risk factor of UAP (OR=1.9,95%CI:1.1~3.0,P =0.03).Conclu-sion:UAP incidence rate of H-type hypertension patients significantly rises than that of general hypertension pa-tients,Hcy is an independent risk factor of UAP.

Objective To evaluate the effect of limited arthroscopic debridement under local anesthesia for knee osteoarthritis. Methods A retrospective analysis was made including a total of 63 patients (77 knees ) with knee osteoarthritis.There were 11 male and 52 female,with an average age of 56.5 years old(range from 38~71 years old).The limited arthroscopic debridement included removal of loose bodies hyperplastic synovum,degenerated cartilage and the injured meniscus.The average follow-up period was 2.1 years (from 6 month to 4 year).Outcomes were assessed by JOA knee function score and rate of satisfactory. Results During the follow-up,the patients showed significant improvement of knee function score from 41 point to 78 point.Clinical outcomes of 77 knees were excellent in 31 knee,good in 28 knee,fair in 12 knee,poor in 6 knee.The rate of good and excellent results was 76.6%. Conclusions Limited arthroscopic debridement under local anesthesia for knee osteoarthritis is a relative simple and effective method.It could alleviate pain and improve function of the paticents.

The apoptosis was observed under a fluoroscope when the tested tumor cells were treated with the supernatant derived from the liquid culture of an actinomyces strain AK 11, which had showed cell toxicity by means of MTT assay, and was further confirmed by the correspondent band of ”DNA ladder” in the agarose gel electrophoresis. In a bioassay employed nude mouse, the pure compound produced by the strain AK 11 showed tumor inhibition in rates of 52.01% and 33.64% corresponding to the dosages of 0.016 ?g?kg -1 and 0.008 ?g?kg -1 ip, respectively. According to the indexes IC 50 of human hepatocarcinoma SMMC7721 and stomach cancer MGC 803 cells, it was estimated that the inhibition effect of the pure compound was slightly stronger than that of Adriamycin. The results showed high antitumor effect of the tested compound from the strain AK 11. When the cells were treated with AK 11, it was found by flow cytometry analysis that cell division was ceased at S phase due to the DNA synthesis block .

Accidents, Occupational ; Humans ; Hydrogen Sulfide ; poisoning

BACKGROUND:Bacterial adhesion is closely related to the surface properties of cobalt-chromium al oys, and therefore, the surface modification technology has become the focus of research in this area. OBJECTIVE:To verify whether the cobalt-chromium al oy with zirconium nitride coating can improve the bacterial adhesion of metal denture materials. METHODS:Magnetron sputtering deposition method was used to plate zirconium nitride film on the surface of cobalt-chromium al oys (experimental group), and cobalt-chromium al oy specimens uncoated served as control group. Streptococcus mutans, Candida albicans, and Actinomyces viscosus were respectively inoculated on the two kinds of test specimen, and at end of culture, the colony counting was done. RESULTS AND CONCLUSION:In the bacterial adhesion test, the number of colonies of three kinds of bacteria in the experimental group was significantly lower than that in the control group (P<0.05). The number of bacterial adhesion in the control group was significantly higher than that in the experimental group. These findings indicate that the cobalt-chromium al oy covered with zirconium nitride coating can significantly reduce the adhesion amount of Streptococcus mutans, Candida albicans and Actinomyces viscosus, and thus improve bacterial adhesion properties of cobalt-chromium al oys.

Objective To examine mutations in the WT1 and PLCE1 gene in three Chinese families with autosomal recessive steroid-resistant nephrotic syndrome (SRNS) once mutations in NPHS2 had been excluded. Methods Peripheral blood samples were collected for genetic analysis from three probands of three Chinese families and their parents, and two probands' siblings, and 50 adult volunteers with normal urinalysis. Genomic DNA was isolated from peripheral blood leucocytes. Ten exons and exon-intron boundaries of WT1, and 31 exons and exon-intron boundaries of PLCE1 were amplified by polymerase chain reaction (PCR). Mutational analysis was performed by DNA sequencing directly and RFLP (restriction fragment length polymorphism) and/or PCR. Results No mutation in both WT1 and PLCE1 was identified in three probands from three Chinese families with autosomal recessive SRNS. However, three variants of WT1, 126C>T, ⅣS5-64A>G and 903A>G, and 13 variants of PLCE1, -134A>G, 810T>C, 960G>A, ⅣS11-28C>G, ⅣS15+26A>C, 4724G>C, ⅣS20+40C>T, ⅣS21+64G>A, ⅣS22-26T> A, 5320C>T, 5780A>G, ⅣS27+24A>G and ⅣS31 +48_49insT, were detected in three probands and some controls, indicating that all these variants were gene polymorphisms. WT1 polymorphism ⅣS5-64A>G, and PLCE1 polymorphism ⅣS22-26T>A were novel. Conclusion All the encoding exons and exon-intron boundaries of both WT1 and PLCE1 in three probands are examined, and no causative mutations in WT1 and PLCE1 axe found, suggesting that mutation in WT1 and PLCE1 genes is not a major cause of the Chinese families with autosomal recessive SRNS.

Objective　To construct an anti-LPS single chain phage antibody library in mice for further biomedical works. Methods　Total RNA was extracted from splenic cells for reverse transcription after BALB/C mice had been immunized with pure LPS for 4 weeks. The designed primers were used to amplify the variable region genes of both heavy and light chain (VH,VL) with polymerase chain reaction. The VH and VL were then conjugated to form a single chain of variable fragment (ScFv) by a linker. The ScFv was cut by NotⅠ and SfiⅠ and then ligated into a pCANTAB5E phagemid vector which was digested with the same restriction enzymes. The ligated vector was then tranfected into the competent E.coli TG1 cells. Four TG1 clones were randomly selected to detect the exotic DNA. Results　The titer of anti-LPS in murine sera was 1∶12 800. The concentration of total RNA was 12.3813 μg/ml. The length of the fragments were 340 bp for VH, 320 bp for VL and 800 bp for ScFv respectively. 1.9×107 clones were grown after transfection and one from the four randomly selected clones was identified to contain the exotic DNA. Conclusion　A 4.75×106 murine anti-LPS single chain phage antibody library was successfully constructed.

BACKGROUND: FG loop (FGL) is a core active peptide fragment of neural cell adhesion molecule (NCAM), which can directly act on fibroblast growth factor receptor 1 (FGFR1) to activate NCAM signal pathway.OBJECTIVE: To observe the effects of synthetic peptides FGL on PC12 cells proliferation and apoptosis.METHODS: ①PC12 cells proliferation and apoptosis: The cultured PC12 cells were divided into control group and experiment group. The experimental group was added with 1% FGL peptide solution. The control group was pre-coated with poly-lysine plates. The cells were cultured 1, 3, 5, 7, 9 d respectively to detect cell proliferation by using Cell Counting Kit-8. ②PC12 apoptosis and nuclear factor kappa B mRNA detection: The PC12 cells were divided into normal group, experimental group and injury group. H2O2 was added into the injury group for 16 hours stimulation. In the experimental group, H2O2 and FGL were used for 16 hours stimulation. The cell apoptosis were detected by flow cytometry; mRNA expression of nuclear factor kappa B was detected by quantitative fluorescent polymerase chain reaction.RESULTS AND CONCLUSION: PC12 cells cocultured with FGL peptide grow well, which indicates that FGL peptides can promote PC12 cell proliferation and inhibit PC12 cell apoptosis, as well as decrease mRNA expression of nuclear factor kappa B.

Objective To evaluate different tigecycline susceptibility testing methods for A.baumannii.Methods Thirty carbapenem resistant A.baumannii (CRAB) and 30 carbapenem sensitive A.baumannii (CSAB) isolates were randomly collected from 30 hospitals during January to December in 2010 in China retrospectively.MIC and inhibitory zone diameters for tigecyclinc were determined by the susceptibility testing methods such as broth microdilution (BMD),agar dilution,E test,MIC Test Strip (MTS),Vitek2.Data were analyzed by comparing the results from each method to those produced by the reference BMD method.The effects of two different susceptibility test media (M-H and ISO-Sensitest Agar) on the MIC of tigecycline were also analyzed.Results For CSAB isolates,the MIC50/MIC90 of BMD,agar dilution,E test,MTS and Vitek2 were as follows:0.125/0.25 mg/L,0.125/0.25 mg/L,0.5/1 mg/L,0.125/0.25 mg/L and 0.5/0.5 mg/L.Compared with BMD method,the categorical agreement rates (CA) of each method were ≥90％,and produced no very major errors (VME) by Food and Drug Administration (FDA)/ European Committee on Antimicrobial Susceptibility Testing (EUCAST) breakpoints.For CRAB isolates,the MIC50/MIC90 of BMD,agar dilution,E test,MTS and Vitek2 were as follows:2/4 mg/L,4/4 mg/L,4/4 mg/L,1/2 mg/L and 2/4 mg/L.Compared with BMD method,MTS produced 3.3％ (1/30)/6.7％ (2/30) VME(FDA/EUCAST breakpoints),and no method CA was ≥90％.The CA between disk diffusion and BMD results were higher by using the criteria of Jones than FDA breakpoints,but only 66.7％ (20/30) were observed in CRAB isolates,and produced no VME.The MIC of tigecycline determined using M-H agar were usually higher than those using ISO-sensitest Agar.Conclusions Agar dilution,E test,Vitek 2 and disk diffusion appear not to be a suitable method for routine susceptibility testing of tigecycline for CRAB strains.Tigecycline intermediate or resistant results determined by these methods require confirmation by BMD,and MTS results also need to be interpreted with caution.

BACKGROUND:Manual reduction for external fixation of distal radius fractures can achieve good outcomes.
OBJECTIVE:To carry out the bibliometric analysis on manual reduction for external fixation of distal radius fractures.
METHODS:Literatures concerning reduction for external fixation of distal radius fractures were retrieved in CNKI database from 2003 to 2012. The keywords were“external fixation;distal radius fractures”. Duplicate and irrelevant articles were eliminated, and a total of 408 articles were retrieved. A bibliometric analysis of these 408 articles was performed in terms of publishing time and number, subject categories, source journals, research institutions, times cited and download frequency.
RESULTS AND CONCLUSION:Literatures concerning manual reduction for external fixation of distal radius fractures exhibit an upward trend in number. In 2012, there were 85 relevant articles. In the past 10 years, 18 relevant articles have been published in Chinese Journal of Traditional Medical Traumatology&Orthopedics, which is the most. There are not many relevant studies in various research units, only 1-7 articles published per unit, and five articles are funded.