It is well established that renin-angiotensin system (RAS) is the major regulatory networkthat maintains blood pressure, fluid and electrolyte balance and the homeostasis of cardiovascular system.Most studies in the last decades centered on the pivotal members of RAS, that is, angiotensinⅡ (AngⅡ) and angiotensin converting enzyme (ACE). Recent identification of ACE-2, the homology of ACE,and the identification of the multiple products degraded from angiotensinⅠ, including AngⅢ, AngⅣ,Ang1 -9, Ang1 -7, Des-Asp-angiotensinⅠ(DAAⅠ), etc, have proved that AngⅡ is not the only bio-logical active compound of RAS. Peptides derived from angiotensinogen,that is, family of angiotensins,display independent and pleiotropic biological activitiesin vivo, and interact with each other both in me-tabolism pathway and the biologic effects. The imbalance of the network of angiotensin metabolites exhib-its significant pathophysiological role in cardiovascular disease.

This paper points out that sunshine purchase, reasonable utilization and scientific management be involved in the management of medical equipment.

Objective:To evaluate the shoulder functions of four groups of patients who underwent different kinds of neck dissections.Methods:40 patients who underwent neck dissection were included,7 patients preserved both accessory nerve and the cervical branches,8 preserved accessory nerve,11 preserved cervical branches and 14 sacrificed both of them.All patients were assessed subjectively at 2 weeks and 6 months after operation,using a questionnaire and an electromyograghy method.Results:The patients whose accessory nerves were preserved had a significant functional rehabilitation of the shoulder,while those who preserved only the cervical branches had a better result than the RND 6 months postoperation.Conclusion: Preservation of the branches from C2-C4 to trapezius muscle during the modified neck dissection should be taken into consideration to improve shoulder functions.

Core human resource serves as the principal capital of carrier of knowledge and skills of a hospital,which is the most decisive factor of a hospital' s competitiveness and adaptability for its initiative and creativity.Their stability and development plays a key role in hospital development.This study analyzed the characteristics and capacity demand of such human resource,and proposed that their management should differ from the rest,recommending reforms in their job description,development and training,performance appraisal,remuneration design and incentive mechanism.

Objective:To generate rabbit polyclonal antibody against human Argonaute2 (Ago2) protein and to identify its functional characterization for determination of differential expression and cellular localization of Ago2 protein in various cell lines.Methods:DNAstar software was applied for searching the high antigenicity region of Ago2 gene sequence termed k-Ago2.Prokaryotic expressing plasmid was constructed and transformed to E.coli BL21 (DE3) to induce expression by IPTG.The fusion protein was injected into rabbits subcutaneously to produce polyclonal antibodies after purification by gel regaining.ELISA was operated to detect antibody titer.Western blot was used to identify the specificity and sensitivity of the antibodies and detect the differential expression of Ago2 protein in various cell lines.Meanwhile,immunofluorescence experiments were arranged to show cellular localization of Ago2 protein.Results:The prokaryotic expressing plasmid was constructed correctly.K-Ago2 protein was expressed and purified,and then rabbit polyclonal antibodies against Ago2 were generated after immunization with k-Ago2 protein.The titer detected by ELISA was 1∶19 000.Western blot results demonstrated the high specificity of the antibodies.Finally,we successfully observed the differential expression and cellular localization of Ago2 protein in various cell lines.Conclusion:The polyclonal antibody against Ago2 protein has been achieved successfully.It will be propitious for the intensive study of the RNAi mechanism and even profound clinical application.

OBJECTIVETo investigate the progressive motility, (PR), total motility (progressive + non-progressive motility, PR + NP), and acrosin activity of sperm from normal and infertile men at different time points after sperm activation.

METHODSBased on the 5th edition of the WHO Laboratory Manual for the Examination and Processing of Human Semen and the results of modified Papanicolaou staining, we divided the semen samples into groups A (normal, n = 28), B (oligoasthenoteratospermia, n = 30), and C (asthenoteratospermia, n = 32). At 1, 24, and 48 hours after sperm activation, we detected sperm PR and PR + NP by CASA and chemical colorimetry, and determined sperm acrosin activity using the modified Kennedy method.

RESULTSSperm PR and PR + NP were significantly decreased in all the three groups at 1-24 hours and even more significantly at 24-48 hours after sperm activation as compared with the baseline (P < 0.05). Sperm acrosin activity showed remarkable reduction in group A (P = 0. 013) , even more significant at 1-24 hours than at 24-48 hours after sperm activation, but not in groups B and C (P = 0.519 and 0.979).

CONCLUSIONSperm PR, PR + NP, and acrosin activity are all decreased with the extension of time after sperm activation, each in a specific manner. Examination of sperm acrosin activity should be applied as a routine tool in the assessment of male fertility.

Acrosin ; metabolism ; Asthenozoospermia ; metabolism ; physiopathology ; Biomarkers ; metabolism ; Humans ; Infertility, Male ; metabolism ; physiopathology ; Male ; Semen ; Sperm Motility ; physiology ; Spermatozoa ; metabolism ; physiology ; Time Factors

Objective To explore the related neurobiochemical mechanism by comparing the concentration change of dopamine (DA),dihydroxy-phenyl acetic acid (DOPAC),glutamate (Glu),and γ-aminobutyric acid (GABA) in the brain tissues in schizophrenia (SZ) developmental model rats and chronic medication model rats.Methods A total of 60 neonatal male Spragur-Dawley (SD) rats were randomly assigned to 3 groups at the postnatal day 6:an SZ developmental rat model group (subcutaneous injection with MK-801 at the postnatal day 7-10,0.1 mg/kg,Bid),a chronic medication model group (intraperitoneal injection at the postnatal day 47-60,0.2 mg/kg,Qd),and a normal control group (injection with O.9％ normal saline during the corresponding periods).DA,DOPAC,Glu,and GABA of the tissue homogenate from the medial prefrontal cortex (mPFC) and hippocampus were examined with Coularray electrochemic detection by high performance liquid chromatogram technique.The utilization rate of DA and Glu was calculated.Results Compared with the normal control group,the concentration of DA and DOPAC in the mPFC and the hippocampus in the SZ developmental model group significantly decreased ( P ＜ 0.05 ),and the GABA concentration and Glu utilization rate in the mPFC also decreased (P ＜ 0.05 ).Compared with the chronic medication model group,the DA concentration of the mPFC in the SZ developmental group decreased ( P ＜ 0.05 ),and the DOPAC concentration and the utility rate of DA in the hippocampus also decreased (P ＜0.01,P ＜0.05,respectively).Conclusion The activities of DA,Glu and GABA system decrease in the mPFC and the DA system function reduces in the hippocampus of SZ developmental rats.

0.05). Accessory pathway antegrade and retrograde effective refractory period values were shorter in patients with PAF attacks (P

Objective To analyze the causes and management of the late complications after transurethral resection of the prostate (TURP) for benign prostatic hyperplasia. Methods The clinical data of 102 patients who were hospitalized for the late complications after TURP were analyzed retrospectively. Results The causes of readmission were residual prostatic hyperplasia for 32 patients (31.37%),bladder neck restriction for 22 patients (21.57%),urethral stricture for 18 patients (17.65%),hematuria for 15 patients (14.71%),epididymitis for 6 patients (5.88%),urinary tract infection for 4 patients (3.92%),carcinoma of prostate for 3 patients (2.94%),and neuropathic bladder dysfunction for 2 patients (1.96%). All patients were satisfied with their therapeutic efficacy after different treatments. Conclusion The main complications after TURP include residual prostatic hyperplasia,bladder neck restriction,urethral stricture and hematuria. Best therapeutic approach should be chosen according to different causes of the late complications after TURP.

Objective To investigate the gene expression of vascular endothelial growth factor(VEGF) and ultrastructural changes in cultured endothelial cells from human cerebral microvessels under hypoxic conditions.Methods Human cerebral microvessels were isolated from freshly obtained specimens of normal brain adherent to resected cerebral arteriovenous malformations.The expression of factor Ⅷ-relative antigen(FⅧ-RA) in cultured cells was observed with immunocytochemistry.The level of VEGFmRNA in cells and released VEGF protein in cell supernatant were determined by RT-PCR analysis and ELISA respectively when they were exposed to hypoxic conditions(95% N_2,5% CO_2;two hours,four hours,eight hours) or maintained in basal condition.Ultrastructural changes in cells were also observed by electron microscopy.Results In inverted microscope the cultured cells showed contact inhibition and a rounded cobblestone appearance.More than 90% of them were stained strongly with antibodies against FⅧ-RA.Significant VEGF mRNA and protein accumulated when these cells were exposed to hypoxia for 4 hours.However,their VEGF expression was down-regulated after hypoxia for 8 hours and a number of vesicles and swollen mitochondria were present in the cytoplasm.Conclusion The level of VEGF expression may havesignificant relationship with ultrastructural changes in human cerebral endothelial cells under hypoxic conditions.