Objective To evaluate objectively the traditional methods on the assessment of bladder outlet obstruction(BOO) due to BPH. Methods Correlation between the urodynamic findings and the traditional diagnostic parameters such as age,IPSS,Vp,Qmax z and PVRr was studied.The clinical prostatic score(CPS),derived from multiple regression of clinical parameters depending on URA,was evaluated. Results The parameters such as age,IPSS,Vp,Qmax z and PVRr were evaluated with reference to pressure flow study.Every parameter alone was not enough for BOO diagnosis. The regression equation was CPS=49.8-3.3 Qmax z+0.5 IPSS+0.2 Vp+7.5 PVRr.Correlation coefficient between CPS and urodynamic findings was 0.629 and was significantly higher than that of any clinical parameter alone.With CPS≥35,the sensitivity was 83.7% and specificity 85.8% for the diagnosis of BOO.With CPS

To investigate the mechanism of detrusor instability, using an apparatus to measure energy regulated tonicity and length of muscle strip in vitro , detrusor instability in bladder outlet obstruction (BOO) and spinal cord injuries (SCI) after pharmacological intervention was studied. The detrusor of both groups contracted under definite tension. Contraction of DI strips occurred under lower tension and under same tension the frequency of contraction was higher in DI detrusor than the normal one. There were no obvious changes when the detrusor strips were treated with M receptor antagonists, ATP or VIP. Muscarinic receptor agonist could increase the excitability of detrusor. The increase of detrusor excitability plays a major role in the occurrence of DI. The excitability is independent on neurogenic factors.

Objective To study the effect of chitosan-pCrmA nanoparticles on the apoptosis of chondrocytes induced by interleukin-1 beta (IL-1β).Methods Chitosan-pDNA nanoparticles were prepared and characterized.The transfection efficiency of chitosan-mediated pIRES2-EGFP was evaluated using fluorescence microscope.The cytotoxicity of chitosan-pIRES2-EGFP nanoparticles in primary rabbit chondrocytes was analyzed by MTT assay.The expression of chitosan-mediated pCrmA in primary rabbit chondrocytes was verified by Western blotting.The effect of chitosan-mediated CrmA on chondrocytes apoptosis induced by IL-1β were analyzed by TUNEL assay.One-way ANOVA was used to analysis.Results The size of chitosan-pDNA nanoparticles was 50 nm.The pDNA release of chitosan-pDNA nanoparticles appeared as biphasic release at pH 2.0 and pH 7.4 buffer.The expression of CrmA in rabbit primary chondrocytes mediated by chitosan could be detected.The chitosan-pIRES2-EGFP nanoparticles had no cytotoxicity.The apoptosis rate of chondrocytes in the chitosan-pCrmA nanoparticles treated group was significantly lower than that of the chitosan treated group (P＜0.05) and PBS group (P＜0.01).Conclsion Chitosan is an effective non-viral gene transfer vector.The CrmA mediated by chitosan can significantly inhibit chondrocytes apoptosis induced by IL-1β,suggesting that chitosan-pCrmA nanoparticles may be the treatment of osteoarthrifis.

Objective To investigate the changes of urinary bladder structure and function of aging rats. Methods The aging group and the young adult group were composed of 24 month old rats and 6 month old rats, respectively. The urodynamic changes were studied with filling cystometry, structural changes by Masson stain and image analysis. Results Filling cystometry revealed that the maximum bladder capacity increased in the aging rats. No difference in leak point pressure was found in the two groups. The occurrence rate of the detrusor instability in aging group was higher than that in young adult group. In bladder structure, fibrous tissue increased significantly but smooth muscle decreased significantly in the detrusor of aging rats. Conclusion Aging may lead to changes of rat bladder structure and function, but its mechanism needs to be further studied.

Naturally occurring mutations in surface proteins of Hepatitis B virus(HBV)usually result in altered hepatitis B surface antigen(HBsAg)secretion efficiency.In the present study,we reported two conserved residues,M75 and M103 with respect to HBsAg,mutations of which not only attenuated HBsAg secretion(M75 only),but also suppressed HBV genome replication without compromising the overlapping p-gene product.We also found M75 and M103 can initiate truncated surface protein(TSPs)synthesis upon over-expression of full-length surface proteins,which may possibly contribute to HBV genome replication.However,attempts to rescue replicationdefective HBV mutant by co-expression of TSPs initiated from M75 or M103 were unsuccessful,which indicated surface proteins rather than the putative TSPs were involved in regulation of HBV genome replication.

Starting from the practices of grade protection assessment on the information system of Peking Union Medical College Hos -pital, the paper introduces the information system grade and assessment contents and processes , discusses common problems found in specific work and risk analysis approaches so as to provide a reference for work related to information security .

Objective To improve the success of the urethral stricture repair in males. Methods Chose 101 males of urethral stricture,their median age was 9 years old (range 3 to 57 years old). Of the patients,61 patients had anterior urethral stricture and the posterior urethral stricture occurred in 40 patients. The length of the stricture varied from 0.5 to 2.0 cm. All patients were repaired with the only genital flap suturing the strictural urethra. Results All repairs were completed in 1 stage, follow-up was from 12 to 18 months, excepted for patients with 3 fistula and 3 urethral stricture, 95 patients were voiding a straight stream, the other 6 patients need another surgery. Conclusion It is a good technique to treat urethral stricture with genital flap ff there is short urethral stricture with sufficient genital skin.

To develop a sensitive and rapid liquid chromatographic-tandem mass spectrometric (LC-MS/MS) method for simultaneous quantitation of metformin and glipizide in human plasma, metformin, glipizide and internal standard diphenhydramine were separated from plasma by protein precipitation with acetonitrile (containing 0.3% formic acid), then chromatographed by using a Zorbax Extend C18 column. The mobile phase consisted of acetonitrile-water-formic acid (70:30: 0.3, v/v/v), at a flow rate of 0.50 mL x min(-1). A tandem mass spectrometer equipped with atmospheric pressure chemical ionization source was used as detector and operated in the positive ion mode. Selected reaction monitoring (SRM) using the precursor/production combinations of m/z 130-->m/z 60, m/z 446-->m/z 321 and m/z 256-->m/z 167 were used to quantify metformin, glipizide and diphenhydramine, respectively. The linear concentration ranges of the calibration curves for metformin and glipizide were 2.00 - 2000 ng x mL(-1) and 1.00 - 1000 ng x mL(-1), respectively. The lower limits of quantitation of metformin and glipizide were 2.00 ng x mL(-1) and 1.00 ng x mL(-1), respectively. The method proved to be sensitive, simple and rapid, and suitable for clinical investigation of compound preparation containing metformin and glipizide.
Administration, Oral ; Chromatography, Liquid ; methods ; Glipizide ; administration & dosage ; blood ; pharmacokinetics ; Humans ; Hypoglycemic Agents ; administration & dosage ; blood ; pharmacokinetics ; Male ; Metformin ; administration & dosage ; blood ; pharmacokinetics ; Sensitivity and Specificity ; Tandem Mass Spectrometry ; methods ; Young Adult

The triterpenoids of Dichrocephala benthamii were investigated by means of silica gel, Sephadex LH-20 and semi-preparative HPLC. Nine triterpenoids were isolated from D. benthamii. By analysis of the EI-MS, NMR spectra and comparison to the data reported in literatures, the structures of these compounds were determined as β-amyrin formiate (1), β-amyrin acetate (2), β-amyrenol (3), β-amyrone (4), 3β-hydroxy-olean-11, 13 (18)-diene (5) , Δ12-oleanene (6) , friedelin (7), dammaradienyl acetate (8), epi-friedeband (9), respectively. Compounds 1-8 were isolated for the first time form this genus, compound 9 was isolated for the first time from this plant, whereas β-amyrin formiate (1) was a new natural product.
Asteraceae ; chemistry ; Triterpenes ; chemistry ; isolation & purification

Objective To determine whether an increased number of transrectal biopsy cores improves the accuracy of biopsy Gleason score. Methods This study reviewed a total of 86 patients who were diagnosed as prostate cancer by transrectal needle biopsy and subsequently underwent radical prostatectomy (RP) without neoadjuvant therapy.The rate of grading concordance between biopsy and RP specimens was analyzed by dividing these patients into 2 groups according to the biopsy cores:group A,46 patients who underwent transrectai biopsy sampling of 6 cores,and group B,40 patients who underwent biopsy sampling of 13 cores. Results The concordance between prostate biopsy and radical prostatectomy Gleason score was 65.0%and 34.8% for 13 core and 6 core biopsy,respectirely (P＜0.05).Furthermore,these findings tended to be more prominent as the biopsy Gleason score was lower.Multivariate analysis identified the number of biopsy cores and percent of positive biopsy cores as independent predictors of accurate Gleason grading regardless of other parameters examined in this study. Conclusion Extended needle biopsy may increases the accuracy of biopsy Gleason score for assessing final prostate cancer grade.