Objective To evaluate the efficacy of target controlled infusion(TCI) of remifentanil and propofol in patients at different ages undergoing gynecologic laparoscopic surgery.MethodsA total of 60 patients(ASA Ⅰ-Ⅲ) undergoing elective gynecologic laparoscopic surgery were divided into two groups according to their age(Group Ⅰ:

Combining the PBL teaching method and the organ system as the core teaching method, we have carried on the teaching practice of 2 comprehensive experiments in the circulation system of hem-orrhagic shock and treatment, as well as the renal function and failure of the urinary system. The implemen-tation process has been divided into two links: preparation before class and class-room practice to improve the students' ability to study and solve the problem of scientific research.

利用导管连接神经断端以实现修复周围神经缺损是目前研究较为活跃的课题。本文主要从生物医用材料研究与应用的角度对近年来的进展进行综述。表明此项研究已由单纯使用导管向利用组织工程原理、综合使用导管及其它方法以更好修复损伤的方向发展。

Objective To research the effect of molecular chimeric mice pre-T cells on proliferation ability of allogeneic mouse T cells.Methods The MHC-Ⅰ gene (H-2Kband H-2Db gene) were extracted and amplified by RT-PCR,the identified pre-T cells were transfected by the constructed eukaryotic expression vector of C57BL/6mouse MHC-I (pIRES-H-2Db and pIRES-H-2Kb),non-transfected group and sham pIRES-transfected control group were set.The molecular chimeric cells were transfused back to BALB/c mouse.After 7 days,T lymphocyte cells of each group were extracted,the ability of molecular chimeric cells inducing spleen T lymphocyte response to allogeneic T cells was observed through mixed lymphocyte culture (MLC).Results Sequencing of the plasmid we have constructed showed that insertion sequence contained C57BL/6 mice H-2Kb and H-2Db series which could be retrieved from GenBank.The result of flow cytometry analysis indicated that H-2Kb and H-2Db protein had an increased expression in pre-T cells,the difference with other two groups was statistically significant (P＜0.05).The result of MLC demonstrated that the stimulation index (SI) of T lymphocyte in co-injection transfected pIRES-H-2Kb and pIRES-H-2Db pre-T cells group (0.764±0.074) were significantly decreased compared with non-transfected group(0.983±0.081)and sham pIRES-transfected group(0.994±0.142) (P＜0.05).Conclusions The molecular chimeric pre-T cells infusion can reduce spleen T lymphocyte response to allogeneic T cells and it may induce immune tolerance in vivo.

Background Diabetic cataract is one of the major ocular complications in diabetes mellitus,including cortical cataract,nuclear cataract,subcapsular cataract and mixed cataract,and different cataractogenesis may be associated with lens epithelial cells (LECs).Subcapsular cataract is one of diabetic cataracts.Studying the biological behavior of LECs in subcapsular cataract is crucial for prevention and treatment.Objective This study was to investigate the effects of Src-family tyrosine kinases (SFKs) on apoptosis and epithelial-mesenchymal transition (EMT) of human LECs cultured by high glucose.Methods Human LECs (HLE-B3) were cultured for 24 hours with DMEM containing 5.5 mmol/L glucose (normal control group),DMEM containing 35.5 mmol/L glucose (high glucose group) and DMEM containing 35.5 mmol/L glucose + 10 μmol/L PP1,a specific inhibitor of SFKs (PP1 group).In 3,6,12 and 24 hours after culture,the apoptosis of human LECs was detected by flow cytometry assay;morphological change of human LECs was observed under the inverted microscope,and the expressions of the markers of EMT,E-cadherin and a-smooth muscle actin (α-SMA),in the cells were detected by immnofluorescence staining.In addition,the alternations of p-Src418 (active c-Src),bcl-xl,survivin,caspase-3,E-cadherin and α-SMA proteins were assayed by Western blot analysis.Results An elevated expression level of p-Src418 was found in LECs in the high glucose group and peaked 6 hours after cultured.The expressions of p-Src418(grey levels) were 0.125 ±0.036 in the high glucose group,and which was significantly higher than 0.042±0.011 in the normal control group and 0.035 ± 0.018 in the PP1 group,respectively (both at P＜0.01).No remarkable differences were seen in the apoptotic rates between the high glucose group and normal control group in 6,12 and 24 hours after culture (all at P＞0.05).The apoptotic rates of human LECs were(6.433±2.084)％,(10.333±2.610)％ and (8.033±2.967)％ in the PP1 group,which were higher than (3.233 ± 1.320) ％,(3.533 ± 1.159) ％,(5.733 ±0.230) ％ in the high glucose group and (3.133±1.170)％,(2.833±0.751)％,(3.333±1.201)％ in the normal control group (all at P＜0.05),however,there were significant differences in the apoptosis between the high glucose group and the normal control group (all at P＞0.05).In 6 hours and 12 hours after cell culture,the expression levels of bcl-xl and survivin (grey values) in human LECs were significantly declined,but the expression of caspase-3 was increased in the PP1 group compared with the the high glucose group and the normal control group (all at P＜0.05).The LECs showed slender in shape 24 hours after culture in the high glucose group,but the cell shape was close to the normal in the PP1 group.Western blot and immunofluorescence assay revealed that the expression of E-cadherin in human LECs was significantly reduced and that of α-SMA was significantly increased 6 hours after culture in the high glucose group compared with the PP1 group and the normal control group (all at P＜0.05).Conclusions High glucose activates c-Src kinase of LECs in high glucose environment and therefore induces EMT and inhibits apoptosis.However,PP1 impedes the biological process of EMT and apoptosis of LECs to maintain the epithelial characteristics even under the stress of high glucose.

To improve bond selectivity of recombinant β-glucuronidase in Escherichia coli (PGUS-E), based on the PGUS-E structure guidance, three key points R329, T369 and N467 were identified to be responsible for the bond selectivity of PGUS-E, and further saturation mutagenesis was conducted. Two positive mutants R329K and T369V were obtained by a combined selection technique of thin-layer chromatography and high performance liquid chromatography. Compared to PGUS-E, the bond selectivity of mutants R329K and T369V increased by 26.9% and 34.3%, respectively; whereas the biochemical properties such as pH and temperature profile were unchanged. Nevertheless, the activity was decreased compared to PGUS-E. These results further confirmed that sites R329 and T369 played important roles for the bond selectivity and activity. In summary, this study significantly increased the bond selectivity of PGUS-E by structure guided saturation mutagenesis, providing experimental support for elucidating the relationship between the structure and function of PGUS-E.
Chromatography, High Pressure Liquid ; Chromatography, Thin Layer ; Escherichia coli ; metabolism ; Glucuronidase ; chemistry ; Industrial Microbiology ; Mutagenesis ; Recombinant Proteins ; chemistry ; Temperature

Objective To explore the related factors with skin flap necrosis,we concluded the cases of patients with skin defects after free flap plantation.Methods From 2001 to 2016,188 cases about 20 influencing factors were analyzed (The characteristics of patients:age,sex,smoke,diabetes,high blood pressure;Preoperative factors:injured sections,injured causes,preoperative wound infection,preoperative wound osteomyelitis,the time from injury to operation;Intraoperative factors:operator,operation time,anesthesia time,intraoperative rehydration fluids,the way of vascular anastomosis,the number of venous anastomosis,the area of flap;Postoperative factors:flap hematoma,flap infection,vascular crisis) and multivariate logistic regression analysis was used to analyze the relationship between these risk factors and flap necrosis.Results All 188 cases were treated with free anterolateral thigh flap to repair soft tissue defect and it was revealed that the 174 cases were successful (92.55％) and 23 cases were occured vascular crisis (12.23％),8 cases were arterial crisis,11 cases were vein crisis,4 cases were ateriovenous crisis.After the treatment,the rescue was successful in 5 cases (38.46％).After the analysis we made the conclusion that the number of venous anastomoses,flap hematoma and vascular crisis were related with the skin flap necrosis.Conclusion The number of venous anastomose (≥2) will increase blood return to make the flap easier to survive.Intraoperative stanching and drainage tube placement work will reduce the skin flap hematoma as a result of reducing the skin flap necrosis.Artery and venous crisis handled in time,can enhance the survival rate of flap.

Objective To study the characteristics of EEG after tramsient ischemic attack and to offer reference for screening procedure of aircrew and astronaut selection. Method The dominant frequency uncertainty of alpha band EEG in 12 pilots(males; age 30±5) with transient ischemic episodes in middle cerebral artery(MCA) territories and in 20 normal healthy pilots was analyzed with frequency-fluctuation analysis. Result The dominant probability of the main frequency coinciding with sites affected by transient ischaemic attack(TIA) in patient pilots was higher than that in healthy pilots (P<0.01),and the dominant probability ratio logarithmic index I≥0 in all patient pilots with normal EEG, but I<0 in all healthy pilots. It was also found that not only I≥0, but the second component shifted to lower frequency(8 Hz) in patients with slight focal EEG alterations,i.e. slowing of frequency. The relative entropy values (percentage) were decreased significantly in pilots with TIA as compared with healthy pilots (P＜0.05). Conclusion The dominant frequency uncertainty analysis of alpha band showed clear superiority of computerized evaluation over routine visual assessment for the diagnosis of minor cerebral ischemia. It offers not only a possibility of studying pathophysiological functional parameter, but also the reference for screening procedure in aircrew and astronaut selection.

ObjectiveTo explore the anatomy and clinical significance of fixation combined with limited outside cut restoration gram needle internal fixation for distal radial fractures. MethodsBased on the anatomical observation and measurement of the forearm and hand. Found out the distal radial fractures fixed bracket screws and gram needle safety area and the needle into the body, and made reasonable angle respectively, to formulate standardized orientation, and applied to clinical procedures, and the clinical cases were followed up. The clinical curative effect was observed. ResultsThe place for the fixed bracket screws of the second metacarpal was the nail parts of radial dorsal partial ends. The proximal fracture for external fixation stents bolt into the nail near abductor muscle and manipulation long in the thumb short extensormuscles. Its feet side for stabbing abductor muscle and refers to a long stretch of radial side for tendon, radial side wrist short stretch muscles. The farthest distance between the lister nodule was (63.69 ±3.00) mm,nearest distance between the lister nodule was(123.64 ±5.00)mm. Gram needle do limited internal fixation security clearance for thumb long stretch tendon and refers to stretch tendons,radial side wrist length stretch tendons, thumb short extensor tendons, stretch retinaculum and this gap proximal distance lister nodule for ( 33. 52 ± 4.20) mm, remote distance lister nodule for( 8.81 ± 0. 88) mm. In clinical applications, wrist imaging recovery, function of ratings had no significant difference ( P ＞ 0.05). But the postoperative complications of the two sets of patients had statistically significant difference ( P ＜ 0. 05 ). ConclusionAccording to the anatomy of distal radial fractures,from the results of our research applied in fixation distal radial fractures in the operation,it had the advantages of simple operation,reset good,fixed firmly,and small trauma. It was worth of used widely in clinical.

MicroRNAisatypeofsingle-strandednon-codingRNA,directlybondingtothecomplemen-tary target gene mRNA.That leads to the inhibition of mRNA translation of the target molecule in order to reduce expression of the target gene.MicroRNAs are not only involved in the regulation of inflammatory reac-tion,but also play important roles in the formation of neoplasm.The researches showing that the inflammatory reaction interacting with miRNAs results in the differential expressions of microRNAs in lung cancer have been widespreadly concerned.Along with the deepening of the research on the mechanisms of inflammatory reaction and differential expression of microRNAs,it will provide new strategies for the prevention,diagnosis and treat-ment of lung cancer.