In order to improve the expression efficiency of recombinant IL~6 in eukaryotic cells, we constructed a new vector pcDIIL-6 to express IL-6 in eukaryotic cells on the basis of an eukaryotic vector pcDNA3IL-6 by introducin g the first intron of human?-globin gene into the downstream of CMV promoter in the pcDNASIL - 6. The IL-6 level expressed by pcDIIL - 6 is 7. 5 times higher than that of pcDNA3IL - 6. On the other hand , we studied the influence of pAdVAntage vector co - transfection on the expression level of IL-6 in eukaryotic cells and found the level of IL-6 is 3. 6 times higher than that of pcDNA3IL - 6. The results we got are beneficial to express cytokines with high efficiency in eukaryotic cells.

Apoptosis is involved in a variety of diseases. Cysteine aspartate specific protease (caspase), a protease family which executes apoptosis, plays a crucial role in course of apoptosis. It can be activated through various pathways. Some natural and synthetic caspase inhibitors will strengthen anti apoptotic action through inhibiting one or several caspase activity, and will become effective means in treating diseases caused by overapoptosis.

Background and purpose:The time from ifrst onset of symptoms or signs to a deifnitive diagnosis is deifned as diagnostic interval (DI). The relation of DI to other clinicopathological parameters andthe impact of DI on prognosis of patients with triple-negative breast cancer (TNBC) remain unclear.This article plans to make an intensive study of these questions.Methods:The clinical records of a series of 83 consecutively presenting unselected patients referred to the Shanghai Sixth People’s Hospital with diagnosed TNBC between September 2009 and September 2015 were retrospectively reviewed. Clinical and pathological factors included were investigated by univariate analysis using the Kaplan-Meier method, the factors associated with prognosis were further evaluated by multivariable analysis with Cox progression model.t-test and Kruskal-Wallis test were used to study the correlation between DI and other characters.Results:DI: stage T3>T1 (P=0.01), stageⅢ>Ⅱ (P=0.03) andⅠ (P=0.01). Compared with patients of DI≥3 months, the <3 months group had earlier age (P=0.028) and TNM stage (P=0.035). T stage, N stage, neoadjuvant chemotherapy, TNM stage and DI are inlfuencing factors of overall survival (OS). Age, T stage, N stage, TNM stage, menstrual status and neoadjuvant chemotherapy are inlfuencing factors of progression-free survival (PFS). TNM staging is an independent inlfuencing factor for OS and PFS.Conclusion:Patients with later disease stage were more likely to have a longer DI; The shorter DI, the earlier age and stage of disease; DI is the inlfuence factor of OS; TNM stage is an independent inlfuencing factor for OS and PFS.

Objective To label the amino-glucomannan(AGM) with fluram and to explore the properties of the compound of fluram-AGM in transmembrane transport.Methods After AGM was labeled with fluram,the peripheral blood mononuclear cells(PBMC) and HepG2 were respectively cultured with Fluram-AGM,then observed under fluorescence microscope with violet light as exciting light.Results Both PBMC and HepG2 showed intracellular indigotic fluorescence.Conclusion AGM can be transported into cells across cell membrane.

Objective To study the condensation mechanism of aminoglucomannan(AGM)with plasmid DNA and some influencing factors in this process.Methods The polysaccharide-DNA complex was analyzed with agarose gel electrophoresis by observing the changes of DNA bands under various influencing conditions including different pH,ionic strength(NaCl concentration),temperature and plasmid DNA sorts.Results The new bands appeared in the slow migration positions after reaction between AGM and plasmid DNA,and the changes of DNA bands content were dependent on AGM concentrations.The condensation degree could be effected by pH,temperature,and ionic strength.Conclusion Our study suggests that the AGM can be condensed with plasmid DNA in proper conditions.

AIM To study the effects of matrine (Ma) on the action potential and contractile force in guinea pig papillary muscles. METHODS Conventional microelectrode technique was used to record the fast action potentials (FAP) and slow action potentials (SAP) induced by histamine and BaCl_2 of guinea pig papillary muscles. RESULTS Ma 10,25,50 ?mol?L -1 dose-dependently prolonged the action potential duration at 50%, 90% repolarization (APD_ 50 , APD_ 90 ) and effective refractory period (ERP) of FAP, and lengthened the APD_ 50 , APD_ 90 of SAP induced by histamine and BaCl_2 when perfused with KCl 25 mmol?L -1 Tyrode's solution. The maximal upstroke velocity (V_ max ) of FAP, SAP and contractile force (Fc) were not affected by matrine 10,25,50 ?mol?L -1 . CONCLUSION It was suggested that Matrine could block K + channels in the myocardium.-

The Fe-N-C composite catalyst was prepared by the thermal decomposition of the chelate precursors based on Fe central ions and o-phenylenediamine ligands.It was observed from the scanning electron microscopy that the crumpled carbon micro-and nano-sheets were intertwined to form a free-standing tremella-like 3D structure.The N2 adsorption/desorption experiments revealed that the composite contained ample micro-and meso-pores and had a specific surface area of 290 m2/g.Graphitic C and multi-crystal Fe3C as main components were confirmed by the X-ray diffraction, and N-doping in the general form of graphite N and pyridine N was also verified by X-ray photoelectron spectroscopy.The electrochemical measurement showed that the tremella-like Fe-N-C composite catalyzed oxygen reduction through a four-electron path in an alkaline solution, and its activity was comparable to the commercial Pt/C catalyst.After 2000 cycles, the limited current density of the Fe-N-C catalytic electrode only decreased less than 5%, and the half-wave potential shift negatively 5 mV, which suggested that the Fe-N-C composite catalyst had better catalytic stability than the commercially used Pt/C catalyst.

ObjectiveTo investigate the change of gene polymorphorism of surfactant protein-B (SP-B) intron 4 in infants with bronchopulmonary dysplasia (BPD).MethodsForty-five infants with BPD (BPD group) and ninety-nine infants without lung diseases (control group) who admitted into Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology from July 2008 to July 2011 were selected into this study.Genotyping for fragment length polymorphism of SP-B intron 4 was performed by polymerase chain reaction (PCR),agarose gel electrophoresis,cloning and sequencing methods in both groups.Differences of allele frequencies (invariant allele and variant allele) and genotype frequencies (invariant genotype and variant genotype) between BPD group and control group were analyzed.The differences of gestational age and birth weight between the two groups were compared with Independent-Samples t test.The gender composition and differences of allele or genotype frequencies between the two groups were compared with Chi-square test.Results Invariant allele frequencies in BPD group and control group were 83.3％ (75/90) and 92.0％ (182/198),and variant allele frequencies were 16.7％ (15/90,including eight insertion alleles and seven deletion alleles) and 8.1％ (16/198,including eight insertion alleles and eight deletion alleles).There were significant differences between the two groups (x2 =4.75,P =0.029).In BPD group,there were 32 cases (71.1 ％,32/45) invariant genotypes and 13 cases (28.9 ％,13/45,including seven cases insertions and six cases deletions) variant genotypes; in the control group,there were 85 cases invariant genotypes (85.8％,85/99) and 14 cases (14.1％,14/99,six insertions and eight deletions) variant genotypes.Significant difference was found between the two groups (x2=4.42,P＜0.036). ConclusionsVariations of SP-B intron 4 were more in BPD infants,and the variation of SP-B intron 4 might be associated with BPD.

Objective To study the methed of designing the surgical nursing electronic medical records and investigate the effect of application.Method According the nursing record form by Guangdong Provincial Clinical Nursing Writing Criterion (Specialty Version),we designed and completed the surgical nursing electronic medical records form.Result After implementation of the nursing electronic medical records,the mean time of measuring and inputting the patients’vital signs was(1.0±0.3)min and the mean time of finishing the nursing electronic medical records was 4.0±0.5 min.Conclusion Standardizing the form and content of nursing electronic medical records can improve the efficiency of routine work and the quality of nursing records.

Objective To analyze the Cyt b gene sequences in Tibet mini-pigs and clarify the differences and genetic relationship with other Chinese pigs.Method The sequence of Cyt b gene was amplified from genome DNA of Tibet mini-pig,Bama miniature pigs,Guizhou xiang pigs and Wuzhishan (WZS) pigs.After sequencing,the base sequences were compared and analysed.The blood relationship tree and evolution position of Tibet mini-pig were established.Result There were 14 mutation sites between domestic pigs in China and pigs from Europe.Besides there was a significant differenee in two nucleotide site:a T→C switch in site 420 and the G→A switch in site 883 at the same time.Conclusion Chinese pigs include Bama miniature pigs,Guizhou xiang pigs and WZS pigs,have a very close blood relationship with some of Tibet mini-pigs.It has been confirmed that there is a certain genetic differentiation in the Tibet mini-pig.