Factor analysis on serum biomarkers in patients with stage Ⅰ silicosis / 中国职业医学

@#Objective ， To investigate the role of serum chemokines and oxidative and antioxidant biomarkers in occupational （ silicosis） Methods silicosis hereinafter referred to as . A total of 58 patients with stage Ⅰ silicosis were selected as the - （ ）， research subjects using convenient sampling method. The serum levels of nuclear factor erythroid 2 related factor 2 Nrf2 -（ - ） - （ - - ） - heme oxygenase 1 HO 1 and 8 isoprstaglandin F2α 8 iso PGF2α were determined by enzyme linked immunesorbent assay. （ ） （ - ） The serum levels of lipid peroxide LPO and total antioxidant capacity TAOC were determined by chemistry colorimetric method. - - （ - ）， Luminex flow fluorescence technology was used to detect the serum levels of interferon γ inducible protein10 IP10 macrophage （ ）- ， - - （ ） inflammatory protein MIP 1α MIP1β and macrophagederived chemokine MDC . The above indicators were analyzed by factor Results - analysis. The information extraction rate of the original indicators of the nine biomarkers was 58.5%96.5%. Four common ， ， （ ） ， factors were extracted including Nrf2 antioxidant signaling pathway helper T cell Th 1 dominant chemotaxis the total ， ， ， ， ， oxidation/antioxidant balance and Th2 dominant chemotaxis whose variance contribution rates were 32.2% 19.1% 16.4% ， ， Conclusion - and 11.8% respectively and the cumulative variance contribution rate was 79.5%. Both the oxidant antioxidant ， disturbance and the dominance chemotaxis are involved in the occurrence and development of silicosis and the Nrf2 antioxidant signaling pathway plays the most critical role.

Efficacy and Safety of Teriflunomide in Chinese Patients with Relapsing Forms of Multiple Sclerosis: A Subgroup Analysis of the Phase 3 TOWER Study / 中华医学杂志(英文版)

Background@#Disease-modifying therapy is the standard treatment for patients with multiple sclerosis (MS) in remission. The primary objective of the current analysis was to assess the efficacy and safety of two teriflunomide doses (7 mg and 14 mg) in the subgroup of Chinese patients with relapsing MS included in the TOWER study.@*Methods@#TOWER was a multicenter, multinational, randomized, double-blind, parallel-group (three groups), placebo-controlled study. This subgroup analysis includes 148 Chinese patients randomized to receive either teriflunomide 7 mg (n = 51), teriflunomide 14 mg (n = 43), or placebo (n = 54).@*Results@#Of the 148 patients in the intent-to-treat population, adjusted annualized relapse rates were 0.63 (95% confidence interval [CI]: 0.44, 0.92) in the placebo group, 0.48 (95% CI: 0.33, 0.70) in the teriflunomide 7 mg group, and 0.18 (95% CI: 0.09, 0.36) in the teriflunomide 14 mg group; this corresponded to a significant relative risk reduction in the teriflunomide 14 mg group versus placebo (-71.2%, P = 0.0012). Teriflunomide 14 mg also tended to reduce 12-week confirmed disability worsening by 68.1% compared with placebo (hazard ratio: 0.319, P = 0.1194). There were no differences across all treatment groups in the proportion of patients with treatment-emergent adverse events (TEAEs; 72.2% in the placebo group, 74.5% in the teriflunomide 7 mg group, and 69.8% in the teriflunomide 14 mg group); corresponding proportions for serious adverse events were 11.1%, 3.9%, and 11.6%, respectively. The most frequently reported TEAEs with teriflunomide versus placebo were neutropenia, increased alanine aminotransferase, and hair thinning.@*Conclusions@#Teriflunomide was as effective and safe in the Chinese subpopulation as it was in the overall population of patients in the TOWER trial. Teriflunomide has the potential to meet unmet medical needs for MS patients in China.@*Trial Registration@#ClinicalTrials.gov, NCT00751881; https://clinicaltrials.gov/ct2/show/NCT00751881?term=NCT00751881&rank=1.

Synthesis and hepatoprotective activity of Mannich base derivatives of silybin / 药学学报

Two novel Mannich base derivatives of silybin, SLB-DEA and DHSLB-PIP, were designed and synthesized. All the structures of new Mannich base derivatives of silybin were characterized by 1H NMR and HR-MS. Their protective action against CCl4-induced liver injury in mice were investigated. The changes of alanine aminotransferase (ALT), aspartate transaminase (AST), lactate dehydrogenase (LDH), total cholesterol (TC) and triglyceride (TG) were determined and the histopathological changes in liver tissues were examined. Pretreatment with a higher dosage of DHSLB-PIP (40 mg·kg-1) prevented CCl4-induced liver injury as indicated by the reduced levels of ALT, AST, LDH and TG. Meanwhile, liver histopathological improvement was observed in the model groups. The pharmacokinetics study in rats showed that the relative bioavailability of SLB-DEA and DHSLB-PIP were 172.5% and 259.8% compared with silybin. All the results suggest that SLB-DEA and DHSLB-PIP may protect liver against injury by CCl4 and the relative bioavailability was significantly increased, which is worth of further investigation for their druggability.

Application of robotic-assisted versus conventional laparoscopy in ureteral reimplantation with psoas hitch / 南方医科大学学报

<p><b>OBJECTIVE</b>To compare the efficacy of robotic-assisted laparoscopic and conventional laparoscopic ureteral reimplantation with psoas hitch.</p><p><b>METHODS</b>We retrospectively analyzed the data of 10 patients undergoing robotic-assisted laparoscopic ureteral reimplantation with psoas hitch and 6 undergoing conventional laparoscopic ureteral reimplantation between June, 2013 and December, 2014 in the General Hospital of PLA. The indications, surgical techniques and outcomes of the two procedures were compared.</p><p><b>RESULTS</b>All the patients completed the laparoscopic procedures without conversion to open surgery. Robotic-assisted and conventional laparoscopic procedures were comparable in terms of the mean operation time (165.50=52.57 vs 152.50=73.60 min), mean volume of blood loss (81.00=69.35 vs 46.67=31.41 mL), mean duration of catheter retention (6.75=1.74 vs 7.50=2.43 days), and mean postoperative hospital stay (7.10=2.08 vs 8.67=3.14 days). The patients were followed up for a mean of 13.5 months, during which none of the patients experienced anastomotic leak, vesicoureteral reflux or hydronephrosis.</p><p><b>CONCLUSION</b>There are no significant differences in surgical indications, surgical techniques or postoperative effect between robotic-assisted and conventional laparoscopic procedures of ureteral reimplantation with psoas hitch, but robotic-assisted laparoscopy can reduced the complexity in operation and increase the surgical precision in patients with a history of pelvic surgery, pelvic adhesion or secondary reimplantation.</p>

Gene Expression Profile of Persistent Postoperative Hypertension Patients with Aldosterone-producing Adenomas / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Hypertension often persists after adrenalectomy for primary aldosteronism (PA). Many studies have analyzed the outcomes of adrenalectomy for aldosterone-producing adenomas (APA) to identify predictive factors for persistent hypertension. However, differentially expressed genes in persistent postoperative hypertension remain unknown. Our aim was to describe gene expression profile of persistent postoperative hypertension patients with APA.</p><p><b>METHODS</b>In this study, we described and compared gene expression profiles in persistent postoperative hypertension and postoperative normotension in Chinese patients with APA using microarray analysis. Confirmation was performed with quantitative real time-polymerase chain reaction analysis. Bioinformatic analysis (gene ontology analysis, pathway analysis and network analysis) was used for further research.</p><p><b>RESULTS</b>Microarray analysis identified a total of 99 differentially expressed genes, including 18 up-regulated and 81 down-regulated genes. Among the dysregulated genes were fat atypical cadherin 1 as well as fatty acid binding protein 4 and other genes that have not been previously studied in persistent postoperative hypertension with APA. Bioinformatics analysis indicated that differentially expressed genes were associated with lipid metabolic process, metal ion binding, and cell differentiation. Pathway analysis determined that five pathways corresponded to the dysregulated transcripts. The mRNAs-ncRNAs co-expression network was composed of 49 network nodes and 72 connections between 18 coding genes and 31 noncoding genes.</p><p><b>CONCLUSIONS</b>This study revealed differentially expressed genes in persistent postoperative hypertension with APA and provided a resource of candidate genes for exploration of possible drug targets and prognostic markers.</p>

Delayed encephalopathy of acute carbon monoxide intoxication in rats: potential mechanism and intervention of dexamethasone

We aimed to investigate the potential mechanism [s] of delayed encephalopathy after acute carbon monoxide [CO] poisoning in rats, and the effect of dexamethasone on this process. A delayed encephalopathy animal model was generated by intraperitoneal injection of CO into Wistar rats. Normal rats were sent as a control group, and poisoning rats were randomly separated into two groups treated with vehicle and dexamethasone respectively. The rat behavior was evaluated by Morris water maze. The level of myelin basic protein [MBP], myeloperoxidase [MPO] expression in the serum and hippocampus of experimental rats was measured using enzyme-linked immunosorbent assay [ELISA] and immunohisto chemistry. The latency to find the platform was significantly increased by dexamethasone treatment for rats after poisoning at day 7 and 14. MBP serum concentration in the vehicle treatment group was significantly higher than that in rats injected with dexamethasone following poisoning at 90min, 7d, 14d, 21d. Moreover, MPO concentration was higher at day 14 after poisoning as well. In addition, MBP expression was down regulated in the poisoning group, which was nearly reversed at control level in the dexamethasone group. Inflammation plays a key role in delayed encephalopathy of rats induced by acute CO intoxication, which could be attenuated by dexamethasone via protecting myelin from damage of inflammation response

Effects of 5-Aza-2'-deoxycitydine and trichostatin A on expression and apoptosis of ALDH1a2 gene in human bladder cancer cell lines / 中华外科杂志

<p><b>OBJECTIVE</b>To study the effect on promoter de-methylation, expression of ALDH1a2 gene and cell apoptosis by treated with 5-Aza-dC and TSA in five human bladder cancer cell lines.</p><p><b>METHODS</b>Human bladder cancer cell lines RT-4, 253J, 5637, BIU-87 and T24 were cultured and treated with 5-Aza-dC and(or) TSA. The expression of the ALDH1a2 gene was detected by RT-PCR and Western blot. The methylation status of gene promoter was determined by MSP, and the cell cycle profile was established by flow cytometry.</p><p><b>RESULTS</b>ALDH1a2 was silenced in five human bladder cancer cell lines. Re-expression of ALDH1a2 was detected after treated with 5-Aza-dC alone or TSA in combination. ALDH1a2 transcript was marked in each cell lines combined with 5-Aza-dC and TSA treatment which showed a synergistic effect on expression of ALDH1a2 transcript. Early apoptotic was the main mode of apoptosis and death of human bladder cancer cell lines induced by 5-Aza-dC and TSA. The percentage of early apoptotic cells was 1.4% in control group and 2.8% in TSA group, however, 20.2% in 5-Aza-dC group and 33.8% in 5-Aza-dC + TSA group, respectively. The groups of TSA, 5-Aza-dC and 5-Aza-dC + TSA were significantly different from control group (P < 0.05).</p><p><b>CONCLUSIONS</b>Aberrant methylation of ALDH1a2 gene is the main cause for gene transcriptional inactivation. Re-expression of ALDH1a2 gene and cell apoptosis are detected after either treatment with 5-Aza-dC alone or in combination with TSA.</p>

Establishment and evaluation of the diagnostic kit for anti-HIV1/2 antibody and P24 antigen / 中华实验和临床病毒学杂志

<p><b>OBJECTIVE</b>To establish and evaluate an Enzyme Immunoassay diagnostic kit combined with anti-HIV1/2 antibody and P24 antigen for shortening the examination window period of HIV infection in HIV laboratory diagnosis.</p><p><b>METHODS</b>The enzyme-linked reaction plates was coated by anti-HIV P24 monoclonal antibody and HIV 1/2 antigen. Labeling HIV1/2 antigen and anti-HIV P24 polyclonal antibody with horseradish peroxidase, setup an integrated ELISA kit for detecting anti-HIV-1/2 antibody and HIV P24 antigen, and evaluate the specificity and sensitivity of this kit.</p><p><b>RESULTS</b>The sensitivity of testing P24 antigen was up to 0.2 ng/ml. 78 serum samples of patients with AIDS, 85 serum samples of healthy people were compared with Abbott EIA kit, the coincidence was 100%. 12 051 sera from normal persons and patients were examined, the sensitivity of 100 %and specificity of 99.62 %, respectively.</p><p><b>CONCLUSION</b>The anti-HIV1/2 antibody and HIV P24 antigen can be measured at the same time using this EIA kit, while the examination window period of HIV infection is shortened. Thus, the method is suitable for laboratory diagnosis and epidemiological investigation.</p>

Study of GRE-T_2 ~* WI MRI diagnosing microbleeding in stroke patients / 中华神经科杂志

Objective To investigate the microbleeding incidence of healthy eldery population and patients with stroke.Methods 30 cases of healthy eldery population,32 cases of cerebral hemorrhage,46 cases of patients with ischemic cerebral vascular diseases were performed of MRI and GRE-T_2 ~* WI examination.Results The microbleeding incidences was 37.5% in cerebral hemorrhage group,28.1% in multiple cerebral infarction group,25.0% in Binswanger's disease group.The most frequently seen microbleeding foci located in ganglia areas,then in thalamus areas,subcortical areas and brain stem,last in cerebellar.Conclusion GRE-T_2 ~* WI,helpful for finding microbleeding and indicating lesion degree of microblooding vessels,plays an important role in the diagnosis of stroke and decision making of treatment.