Objective:To study the effects of PTK on the respiratory burst and release of NO by neutrophils in response to transmembrane TNF-?( TM-TNF-?) and secreted TNF-? ( S-TNF-?). Methods: The effects of PTK inhibitor on the functions of neutrophils caused by both forms of TNF-? was detected with the chemiluminescence and the nitrate reductase assay.The tyrosine phosphorylation of neutrophils induced by the two forms of TNF-? was compared by Western blotting analysis. Results: The PTK inhibitor genistein (50 ?mol/L) was found not only to depress the respiratory burst of neutrophils induced by S-TNF-?( P

Abstract Objective:The effects of both TM-TGFa and S-TGFa on proliferation were compared to explore the biological characteristics of the two forms of TGF-a.Methods:The proliferation of mouse fibroblast cell line NIH3T3 and its expression of PCNA were determined by the methods of MTT and histochemical technique. The level of IL-6 mRNA in HaCaT cell line was tested by in situ hybridization. Results:The two forms of TGFa were able to promote cell proliferation,PCNA expression and IL-6 mRNA transcription.The effects of S-TGFa had been shown stronger than that of TM-TGFa( P

Transmembrane TNF-? is an integral protein expressed on the surface of avtivated monocytes/macrophages. In order to define the interrelation between TM-TNF and biomembrane, we used an in vitro translation system and microsomal membranes to engender expression models of two types of TM-TNF; TM-TNF anchored to microsomes and naked 26kD TNF without membranes. When the cytotoxic activity of these two types of TNF was compared, the synthesized 26kD TNF was found to exert its effects only in the presence of microsomal membranes. With the use of indirect immunofluorescence technique, we further studied the binding of the in vitro translated 26kD TNF with TNFR on the membrane of HL60 cells. It was found that only TM-TNF attached to the microsomes could bind effectively with TNFR, while naked 26kD TNF could not. These results suggest that binding with biomembrane may be the prerequisite for 26kD TNF to fold properly for displaying its biological effects. In case 26kD TNF is freed from membrane, it can no more bind with TNFR, there by leading to loss of its cytotoxic effect.

OBJECTIVE To analyze the reasons of ethylene oxide disinfection failure and give the countermeasures to guarantee the sterile quality.METHODS The investigation was carried out from the basic component of the whole disinfection,tracing and finding out the reasons of failure,and raising countermeasures.RESULTS Without meeting the sterile standards of the packages,incorrect packing method,without seriously checking and too much loading were the main failure reasons.CONCLUSIONS More education for the staff,good packing and education with the procedures of ethylene oxide disinfection are the key points to guarantee the sterile quality.

Objective:To optimize the formula of Junduqing dispersible tablets .Methods:Using appearance , disintegration time and dispersing uniformity as the indices ,the types of filler, disintegrating agent and adhesive were optimized by single factor tests;the amount of filler and disintegrating agent was optimized by orthogonal experiments with the disintegration time as the index ; using ap-pearance and sticking as the indices , the single factor tests were also used to optimize the lubricant , and the adding method of disinte-grating agent was optimized using disintegration time as the index .Results: For 500 tablets, the amount of Junduqing extract was 61.25 g, microcrystalline cellulose (52.5 g) and dextrin (17.5 g) were used as the fillers, crospolyvinylpyrrolidone (8.75 g) and croscarmellose sodium (26.25 g) were applied as the disintegrating agents , 70% ethanol was the binder , magnesiumstearate (3 g) and talcum powder (2.25 g) were used as the lubricants , and stevioside (3.5 g) was the flavoring agent .Conclusion:The formula is reasonable and feasible ,which provides reference for the preparation of Junduqing dispersible tablets .

Objective:to construct and test the structural equation model of influencing factors of clinical nursing teaching quality, and analyze the influencing factors and strength of clinical nursing teaching quality.Methods:Based on the literature, 20 indexes influencing the quality of clinical nursing teaching were selected. In July 2019, clinical nursing teachers of a third class a medical institution were selected for convenient sampling survey. Through factor analysis, 20 indexes were classified into 6 dimensions, namely, teaching environment, teaching attitude, teacher quality, teacher behavior, teaching management and teaching quality.Results:The structural equation model of influencing factors of clinical nursing teaching quality was constructed. The fitting index of the model reached the standard value, and the model had a good fit.Conclusion:With the help of this model, the nursing administrators can find out the factors and intensity that affect the quality of clinical nursing teaching, which is helpful to put forward the improvement strategies of improving the quality of clinical nursing teaching, to improve the effect of clinical nursing teaching, to improve the quality of clinical nursing teaching, and to provide reference for the research of similar clinical nursing teaching quality.

Objective:To prepare the thermosensitive nasal gel of ephedrine hydrochloride and diphenhydramine hydrochloride and establish its quality control method. Methods:The amounts of P407, P188 and PEG 6000 were optimized by an orthogonal test with the gelling temperature as the index. An HPLC method was established to determine the contents of ephedrine hydrochloride and di-phenhydramine hydrochloride. Results:The optimum amount of P407, P188 and PEG 6 000 was 19%, 2% and 1%, respectively. The linear range of ephedrine hydrochloride was 1.600 0-2.400 0 mg·ml-1(r=0.999 6), and the average recovery was 99.76%with RSD of 1. 02%(n=9). The linear range of diphenhydramine hydrochloride was 0. 160 0-0. 240 0 mg·ml-1(r=0. 999 7), and the average recovery was 101. 27% with RSD of 1. 10%(n=9). Conclusion:The formula design and preparation technology of the gel are feasible. The HPLC method is suitable for the quality control of the preparation.

Objective:To prepare the ocular thermosensitive gel of atropine sulfate and study its in vitro release. Methods: The gel formula was optimized by central composite design response surface methodology. The influences of the amounts of poloxamer 407 (P407) and poloxamer 188(P188) on gelling temperature before and after the dilution with simulated tear fluid were investigated. A membraneless dissolution model was used to determine the gel erosion and in vitro release. Results:The optimized gel formula was as follows:23% P407 and 5% P188. The deviations between the measured values and predicted values were all lower than 5%. The in vitro release experiment showed that the gel erosion and the drug release fitted zero-order kinetics equations with promising correlation, indicating a dissolution-controlled release mechanism. Conclusion:The optimization of the ocular thermosensitive gel of atropine sul-fate can be achieved by central composite design response surface methodology with good estimation. The thermosensitive gel with sus-tained drug release property meets the design requirements.

Objective:To study the effects of secreted stem cell factor(S SCF) and transmembrane SCF(TM SCF) on the biological functions of mast cells,including proliferation,release of histamine and secretion of cytokine to explore the biological characteristics of the two forms of SCF.Methods:MTT,fluorescence technique,in situ hybridization were used to detect the several biological functions of mast cells,such as proliferation,release of histamine and the transcription of TNF ? mRNA.Results:It was shown that S SCF could significantly promote the proliferation of mast cells,release of histamine and TNF ? mRNA transcription,while TM SCF had only a weaker positive effect on histamine relase and no any effect on proliferation and TNF ? mRNA transcription.Conclusion:The biological actions of TM SCF on mast cells are different from that of S SCF.

Objective:To construct and express the recombinant of human soluble TNF receptor I by E coli Methods:The cDNA coded for extracellular region of human TNFRI was amplified by RT PCR and inserted into a expression vector, pET 28a Then, the recombinant sTNFRI/pET 28a was transfected and expressed in E coli Results:After the stimulation with IPTG, sTNFRI fusion protein was effectively produced in E coli BL 21 transfected with the exogenous gene A unique band was found at 27 kD by SDS PAGE and its expression was about 31% of total protein in E coli The purified sTNFRI fusion protein was shown to be able to suppress the cytotoxicity of TNF on L929 cells and found by indirect immune fluorescence to inhibit specifically the binding of TNF with TNFR on target cells Conclusion:The recombinant human soluble TNFR I have been obtained by using the genetic engineering technology