Objective To investigate the effects of 5-Aza-2'-deoxycytidine (5-Aza-dc),a methylation inhibitor,on the proliferation of androgen-sensitive prostate cancer line (LNCaP),and on its regulation of methylation on glutathione s transferaseP1 (GSTP1) and retinoic acid receptorβ2 (RARβ2) gene.Methods LNCaP cells were treated with 5-Aza-dc in different concentration,CCK8 method was used to detect the growth of LNCaP cells.The methylation of GSTP1 and RARβ2 gene in LNCaP cell was detected by nested methylation specific polymerase chain reaction (nMSP).Results The proliferation of LNCaP cells was inhibited after exposed to 5-Aza-dc.The methylation of GSTP1 and RARβ2 gene was changed from hypermethylation to demethylation by the 5-Aza-dc.These effects were dose-and time-dependent within certain concentration of 5-Aza-dc,but LNCaP cells grew better after 72 h than within 48 h when exposed to 5 Aza dc below 1.0 μmol/L.Also the methylation of GSTP1 and RARβ2 gene changed from hypermethylation to demethylation by the 5-Aza-dc was not different when exposed to 5-Aza-dc below 1.0 μmol/L within 72 h and 48 h.Conclusions 5-Aza-dc may effectively inhibit the growth of LNCaP cells and reverse the DNA methylation damage in some tumor suppressor genes,but the continuity and stability of low dose 5-Aza-dc is changeable.The study will provide a research basis for clinical treatment.

Purpose To study the expression of HK2 in human prostate cancer (PCa) tissues and its effect on malignant phenotype of prostate cancer cells.Methods HK2 expression in PCa tissues was determined by microarray database and immunohistochemical staining.Subsequently,the change of cellular phenotype was detected by glycometabolism kit,CCK-8 kit,and flow cytometry after HK2 knockdown.Results HK2 expression was elevated followed by prostate cancer development.HK2 depletion inhibited cellular proliferation and aerobic glycolysis,and increased the ratio of early apoptosis.Conclusion HK2 expression increases in the process of PCa malignant progression.It plays a critical role in cellular proliferation,glycometabolism,and apoptosis,the mechanism of which needs further exploration.

Gastroenterology ; Humans ; Integrative Medicine

BACKGROUND: Disease pathogenic factors are complicated. There is not an effective method to analyze large sample data mining, and application ability of information technology of clinical doctors needs to be improved. OBJECTIVE: Using BP algorithm of artificial neural network to analyze large sample clinical cases, in order to explore inner relations between disease pathogenic factors and diseases.METHODS: Take hypertension for example, medical data of patients with hypertension in a traditional Chinese medical hospital served as experimental data, and the influence factors of the disease were simulated with Microsoft SQL Server 2005 Analysis Services, the mining data was analyzed, and a single query was used as prediction and decision support.RESULTS AND CONCLUSION: Analysis of effect of disease pathogenic factors on disease itself based on artificial neural network with BP algorithm has good predictive effect in clinical diagnosis, which is of benefit to enhance the diagnostic efficiency of medical personnel using information technology.

Objective To present the surgical technique of transumbilical laparoendoscopic singlesite pyeloplasty (LESS-P) for pediatric patients with ureteropelvic junction obstruction (UPJO).Methods Twenty-four pediatric patients with UPJO had transumbilical LESS-P performed by the same surgeon from June to December 2010.Sixteen patients were male and eight female aged from 2 to 62 months with an average age of 14 months.Eighteen patients had obstruction on the left side and six on the right side.Dismembered LESS-P was carried out with the Anderson-Hynes anastomosis where 5-0 sutures were uswed over a double J ureteric stent.Results All operations were successful.None was converted to open surgery and no additional sheath tube or incision besides the umbilicus was needed.No intraoperative complications occurred.Ectopic blood vessels were found in two patients during surgery.The mean operative time was 145 min,and the average blood loss about 10 ml.Abdominal drainage tubes remained for 2 -9 d after surgery.The mean postoperative hospital time was 7 d.Two patients had postoperative urinary fistula,which naturally disappeared at 4 and 7 d postoperation,respectively.Follow-up with ultrasound and diuretic renal scintigraphy found 23 patients had significantly decreased renal pelvis diameter,the remaining case showed no obvious change,but diuretic renography showed significantly improved excretion.ConclusionsPediatric transumbilical LESS-P could be safe and effective.LESS-P could achieve comparable clinic outcomes to standard laparoscopy.

Leaves of Chrysanthemum morifolium were potential medicinal resource. The present study aims to estimate the main bioactive components: total flavonoids (TF), galuteolin (GA), quercitrin (QU), chlorogenic acid (CA) and 3 ,5-O-caffeoylquinic acid ( CQ), which were considered to be the main effective components, in leaves of C. morfolium cultivars in China. The TF content was estimated hy UV-VIS spectrophotometry, while GA, QU, CA, and CQ were quantitatively determined by HPLC. The highest TF content (7. 13% w/w) was found in cultivar Wan Cong (Shexian county). Cultivar Da Bo ( Bozhou county) had the highest GA content (33. 45 mg - g-1); Cultivar Hong Xin (Sheyang county) contained the highest QU content (29.25 mg · g(-1)); Cultivar Chang Ban (Sheyang county) had the highest CA content (13.14 mg ·(-1)). The maximum CQ content (7.35 mg · g(-1)) was observed in culti- r Da Yang ( Tongxiang county). Different cultivars of C. morfolium had significant difference in components, but the leaf and capitulum of C. morifolium. were found to possess similar chemical compositions. The high content of bioactive components in several cultivars suggested the potential utilization of C. morifolium leaves.
China ; Chromatography, High Pressure Liquid ; Chrysanthemum ; chemistry ; growth & development ; Drugs, Chinese Herbal ; analysis ; Plant Leaves ; chemistry

Objective To investigate the trend of antimicrobial resistance and the prevalence of resistant genes in Pseudomonas aeruginosa strains isolated from Hangzhou First People's Hospital.Methods Antimicrobial susceptibilities of 1489 Pseudomonas aeruginosa strains isolated from 2003 to 2007 were statistically analyzed using WHONET.MICs of 11 antimicrobisis to 36 multi-drug-resistant Pseudomonas aerugionosa strains were determined by agar dilution method.Genes of β-lactamases(BLA)and aminoglycoside-modifying enzymes(AMEs)were detected by PCR and the PCR products were sequenced.Results The resistant rates to aztreonam,imipenem,ceftazidime,cefepime,piperacillin,piperacillin/tazobactam.cefoperazone/sulbactam,ciprofloxacin,levofloxacin,gentamicin and amikacin were increased from 13.4%,10.6%,8.7%,7.9%,12.7%,12.7%,6.7%, 15.8%,20.5%,24.7% and 10.9%in 2003 to 35.3%,40.9%,18.4%, 32.4%,32.9%,32.0%,21.9%,37.8%,38.6%, 39.4% and 34.8% in 2007.respectively.Hish MICs of 11 antimicrobiMs for multi-drug resistant Pseudomonas aerouginosa were determined with MIC90≥128 μg/mL.In 36 multi-drug resistant Pseudomonas aeruginosa strains,21(58.3%)strains carried β-lactamase genes and 32 strains(88.9%)carried aminoglycosidemodifying enzyme genes,while the deletion rate of oprD2 was 80.6%(29/36).Conclusions The resistant rates to common antibiotics of Pseudomonas aeruginosa have increased.resulting in multi-drug resistance.Genes of β-lactamases and aminoglycoside-medifying enzymes are prevalent in multi-drug resistant Pseudomonas aeruginosa strains,with the common deletion of oprD2.

Peking University Third Hospital is one of the first hospitals for experiments in clinical pathway selected by the Ministry of Health,which keeps optimizing the clinical pathway management mechanism and function of information system in its 4-year practice.This article described the combination strategy of clinical pathway management and information system applications,in terms of reasonable design of the management plan,standardized clinical pathway,strengthened execution control and improvement of the quality control.The purpose is to balance the relationship between clinical pathway management norms and user-friendliness of the system,enhance rationality and feasibility,improve efficiency and provide high-quality service to ensure medical safety.

A novel antimicrobial peptide, named as perinerin (GenBank accession No. P84117), was isolated and characterized from Asian marine clamworms, Perinereis aibuhitensis Grube. Perinerin showes powerful and broad activity against both grampositive and gramnegtive bacteria in vitro, especially on Pseudemonas aeruginosa. To obtain large amounts of active perinerin and characterize its main physiochemical features, The perinerin weve expressed in Pichia pastoris. Intact perinerin gene amplified by the modified gene SOEing method(Gene splicing by overlap extension)was cloned into expression vector pPICZ?A and obtained recombinant vector pPICZ?APEN, then pPICZ?APEN was expressed in the Pichia pastoris GS115. The expressed sample was analyzed by TricineSDSPAGE. The results showed that Pichia pastoris was a suitable system producing the secreted form of perinerin. Bioactivity assay showed that the recombinant perinerin had marked antimicrobial effects.

Objective To explore the changes of pathogens and antibiotic susceptibility in a respiratory ward.Methods All pathogens isolated from patients in a respiratory ward from 2001 to 2005 and the drug susceptibility results were retrospectively analyzed.For patients with more than 1 isolates of the same species, only the first strain of pathogen was included for analysis. The isolation and identification procedure was based on guidelines for national clinical laboratories.The susceptibility test was performed by disk diffusion method.WHONET 5.3 software was used for statistical analysis.Results A total of 876 strains were analyzed.The majority was gram negative bacteria.MRSA prevalence was 72.4% and showed a trend of increase.No vancomycin resistant Staphylococcus aureus or Enterococcus was detected.Streptococcus pneumoniae was highly resistant to macrolides.The non-sensitivity rate to penicillin was 25.5%-66.7% over years.The resistance rate to levofloxacin was 22.2%-27.3%.Enterobacter and Acinetobacter baumannii showed stable susceptibility to imipenem.ESBLs-producing Esche- richia coli and Klebsiella pneumoniae accounted for 33.3%-38.9% and 14.3%-19.2% respectively.P.aeruginosa strains were relatively susceptible to ceftazidime, amikaein, cefoperazone-sulbactam, imipenem, piperacillin-tazobactam and cefepime. The sensitivity rate was 87%, 82.6%, 78.3%, 73.9%, 73.9% and 71.4% respectively in 2005.Conclusions The changes of pathogens and antibiotic resistance in the respiratory ward were consistent with the surveillance data in this country, which were influenced by underlying diseases, severity of illness and antibiotic use.Our data are useful for the guidance of rational use of antibiotics.