OBJECTIVE To explore an effective cleaning method to improve the washing quality of contaminated complicated medical instruments.METHODS The used puncture needles were washed by three methods(ultrasonic wave only,ultrasonic wave + polyenzyme detergent,ultrasonic wave + spray washing with special washing-rack designed by ourselves,while artificial washing group as control group,3 pieces per group).After washing,the samples were further assayed with HemoCheck-s swab to compare the washing effect.RESULTS The color of cotton swabs was turned blue or light blue.CONCLUSIONS Our results have demonstrated that ultrasonic cleaning plus spray washing with special washing-rack can improve the cleaning quality.

Aim Enteric microspheres were prepared to prevent the interaction of drug with gastric acid and to improve its bioavailability. Methods The enteric microspheres with a matrix structure were successfully produced using a spherical crystallization technique. Hydroxypropyl methylcellulose phthalate ( HP-55 ), an enteric material, was coprecipitated with the drug by salting-out effect during the preparation process. A mixture of water and ethanol was chosen as a good solvent and dichloromethane was used as a the first time to prepare microspheres by making the water-soluble drug and water-insoluble excipient coprecipitated. In vivo test demonstrated that the drug absorption from the enteric oleanolic acid dihemiphthalate sodium (OADHPS) microspheres was significantly prolonged compared to that with OADHPS powder after a lag-time. Furthermore, the drug bioavailability was 181.6% greater than that with the OADHPS powder. Conclusion The microspheres of water soluble drug could be prepared by using water phase replacing organic phase as poor solvent which decrease the quantity of organic solvent and benefit the environment prevention.

Objective To observe the effects of all-trans retinoic acid (ATRA) and oxaliplatin (L-OHP) on the proliferation of human gastric cancer BGC-823 cells. Methods Human gastric cancer cells BGC-823 were treated with ATRA and/or L-OHP,respectively. The cell proliferative activity was assessed by MTT assay. Cell morphological changes were observed under inverted microscope while apoptosis rate and cell cycle were assayed by flow cytometry. The expressions of Bcl-2 and Survivin protein were detected by immunocytochemistry. Results The proliferation of the cells treated with ATRA was inhibited obviously and the morphology of the cells changed. The apoptosis rate of BGC-823 cells increased gradually and the effect was enhanced when ATRA was combined with L-OHP. After treatment with ATRA,the expressions of Bcl-2 and Survivin protein in BGC-823 cells were both down-regulated obviously. With the combination of ATRA and L-OHP,the expressions both further decreased. Conclusion ATRA can inhibit the proliferation of human gastric cancer BGC-823 cells,and the inhibitory effect is synergistic when ATRA is combined with L-OHP. The mechanism might be related to the down-regulation of Bcl-2 and Survivin protein expressions.

OBJECTIVE:To establish a method for the separation and detection of related substances in baicalein,identify its structure and preliminarily explore the degradation mechanism. METHODS:HPLC was adopted to detect the baicalein,related impurities and forced destruction of degradation products in synthesis process:the column was ES Industries? FluoroSep-RP Phenyl with mobile phase of 0.3%formic acid-methanol-acetonitrile(gradient elution)at a flow rate of 1.0 mL/min,the detection wavelength was 275 nm,the column temperature was 10℃,and the injection volume was 10μL. LC-MS/MS was conducted to identify the related substances and conjecture degradation mechanism:the column was ES Industries? FluoroSep-RP Phenyl with mobile phase of 0.3%formic acid- methanol (gradient elution)at a flow rate of 1.0 mL/min,the detection wavelength was 275 nm,column temperature was 10℃,and the injection volume was 10μL;ion source was electrospray ion source,positive and negative ions,nebulizer pressure was 55 psi and the drying gas flow was 11 L/min,drying gas temperature was 350℃,capillary voltage was 4.0 kV,detection modes were full-scan first-order MS and selective ion full-scan second-order MS,scan ranges were m/z 100-1000 (first-order MS) and 50-500(second-order MS),ionization voltage was 80-135 eV,and the collision energy was 10-30 eV. RESULTS:The linear range of baicalein was 2.4-480μg/mL(r=0.9999);RSDs of precision,stability and reproducibility tests were lower than 2.0%;the limit of quantitation was 7.2 ng,the limit of detection was 2.4 ng. Baicalein was well separated with related substance and 3 major degradation products,the related substance was chemical synthesis precursor wood butterfly;the degradation products were 6,7-quinone derivatives and 7,8-quinone derivatives,which were isomers;oxidative degradation products were benzoic acid phenyl ester derivatives. CONCLUSIONS:The main mechanisms of alkali degradation and oxidative degradation of baicalein include pyran, reciprocal rearrangement and oxidation reaction;the established method is specific and sensitive,and can be used for the detection of related substances in baicalein.

Purpose　Both the working standard and corresponding sample(GRAN75)were first calibrated by WHO international standard for G-CSF.Methods　MTT method by NFS-60 cells was used. The results were calculated by (4,4)method.Results　Three batchs working standards were prepared,two batchs were freeze-dry and the prescription was same as WHO international standard for G-CSF,one batch was injection and the prescription was same as corresponding sample(GRAN75).The biological potency and the FL% of average potency were 3.062×106 、4.276×106IU/ampoule、1.635×107IU/ml and 5.529%、4.291%、4.244% for working standard, and 1.880×107IU/ml and 5.175% for corresponding sample,respectively.Conclusion　The working standard which calibrated could be used as working standard in the measurement of rhG-CSF biological activity.

Purpose　The determination method of rhG-CSF bio logical activity by NFS-60 cells was studied in accordance with WHO internation al standard for G-CSF.Methods　MTT method was adopted.R esults　The chomosone number of NFS-60 cell was 39, about 1×105 cells/ml to 1×107 cells/ml,the dying color showed gradient when the NFS-60 c ells was dyed by MTT,the method(4,4) was adopted in the determination of rhG-CS F biological activity,the average FL% of potency was 13.560% for single exprimen t,and the CV of inter-assay and intra-assay was lower than 10% and 10.109%,respectively.Conclusion　method(4,4) can be us ed in the determination of rhG-CSF biological activity,and the results can guid e the study and the manufacture of rhG-CSF effectively.

Objective:To explore the therapeutic effect and safety of thrombus aspiration catheter in young patients with acute ST-segment elevation myocardial infarction (STEMI) during primary percutaneous coronary intervention (PCI) .Methods :According to using thrombus aspiration catheter during emergency PCI or not ,a total of 79 young patients with acute STEMI were divided into aspiration group (n= 37 ,received thrombus aspiration ) and routine treatment group (n=42 ,didn't receive aspiration catheter ) .Coronary TIMI flow ,angina pectoris symptoms ,cardi-ac function and major adverse cardiovascular events (MACE) etc .after PCI were observed and compared between two groups .Results:Compared with routine treatment group after treatment ,there were significant rise in TIMI flow [ (2.33 ± 0.48) grade vs .(3.00 ± 0.00) grade] ,2h ST segment regression >50% rate (45.24% vs .70.27% ) and left ventricular ejection fraction on the first week [ (47.21 ± 9.28)% vs .(52.16 ± 7.87)% ];significant reduc-tion in angina pectoris symptom (50.00% vs .27.03% ) ,and NYHA cardiac function during follow-up [ (1.52 ± 0.71) class vs .(1.22 ± 0.42) class] in aspiration group , P<0.05 or <0.01. There was no significant difference in incidence of MACE between two groups , P>0.05 all .Conclusion:Application of thrombus aspiration catheter could improve coronary blood flow ,reduce symptoms of angina pectoris and improve cardiac function during primary PCI in young patients with acute STEMI ,and it's safe .

Estrogen Receptor (ERalpha) is a member of superfamily of ligand-activated transcription factors which play critical roles in many biological processes. To screen novel modulators of ERalpha for drug development and biological function research, we developed a mammalian one-hybrid-based high-throughput screening model for ERalpha modulator. We cloned the ERalpha LBD gene from the total mRNA of fat tissue by RT-PCR and fused it with the GAL4 DNA binding domain of pBIND-GAL4 plasmid to construct a chimara expression plasmid pBIND-GAL4-Eralpha(LBD). The L02 cells was cotransfected with pBIND-GAL4-ERalpha(LBD) and a GAL4-responsive luciferase reporter plasmid pGL3-GAL4, and following treatment with test compounds for 24 h, the activities of luciferase were detected to evaluate the transactivities of ERalpha modulators. After manner optimizations of transfection conditions, Estradiol, an agonist control, induced the expression of luciferase in a dose-dependent with EC50 of 0.17 micromol/L, the maximum folds of induction was about 28.1. Tamoxifen, an antagonist control, efficiently suppressed the estradiol-mediated luciferase induction with EC50 of 0.10 micromol/L. Using this screening model, we discovered four ERalpha agonists from 2000 natural and synthetic compounds.
3T3-L1 Cells ; Animals ; Chimera ; metabolism ; DNA-Binding Proteins ; biosynthesis ; genetics ; Estrogen Receptor Modulators ; chemistry ; isolation & purification ; Estrogen Receptor alpha ; agonists ; Genes, Reporter ; genetics ; Genistein ; chemistry ; isolation & purification ; HeLa Cells ; Humans ; Luciferases ; genetics ; metabolism ; Mice ; Models, Chemical ; Saccharomyces cerevisiae Proteins ; biosynthesis ; genetics ; Transcription Factors ; biosynthesis ; genetics ; Transfection

Objective To evaluate the application and effects of mind map in nursing handover. Methods Two wards which had similar scale, environment, property and level of nursing were randomly chosen as the experimental group and the control group by tossing a coin in Tianjin Hospital of ITCWM Nankai Hospital, 28 nurses were selected in each group, according to the inclusion and exclusion criteria, control group takes routine handover, the experimental group takes handover by following the guidance of mind map. The mind map of clear mind were designned. The Chinese version of Handover Evaluation Scale was used to evaluate the effects of mind map in the nursing handover, the inpatients'satisfaction was compared between the experimental group and the control group after the application of min-d map. Results After3-month intervention, results showed that the score of handover evaluation scale in the experimental group were (31.39 ± 1.34) points, (19.57 ± 1.23) points, (17.61 ± 1.29) points, (68.57 ± 2.49) point, the score of handover evaluation scale in the control group were (26.71±1.24) points,(18.71±1.33) points,(16.68 ± 1.33) points, (62.11 ± 2.94) points, the difference was statistically significant(t=2.504-13.530, P<0.05);in the experimental group, the score of handover evaluation scale increased significantly than that before intervention, and the difference was statistically significant (t=-17.450--5.663, P<0.05);the inpatients′satisfaction in the experimental group was 98.89%(89/90), the control group was 90%(81/90) after intervention, and the difference was statistically significant(χ2=6.776, P<0.05); in the experimental group, the inpatients′satisfaction was better than that before intervention, and the difference was statistically significant (χ2=4.211, P<0.05) .Conclusion:The application of mind map in the n-ursing handover can improve the level of nursing handover and the quality of nursing care, contributing to dveloping high quality of nursing service.

ObjectiveTo investigate the risk factors for open pancreatic necrosectomy (OPN), an effective treatment method for severe acute pancreatitis (SAP) after the failure of percutaneous catheter drainage (PCD), in patients with SAP. MethodsA retrospective analysis was performed for 156 patients with SAP who underwent surgical intervention based on the step-up approach in The Affiliated Hospital of Zunyi Medical University from January 1, 2010 to June 30, 2018, and according to whether OPN was performed, the patients were divided into PCD group with 126 patients and PCD+OPN group with 30 patients. Related clinical data were collected, including age, sex, etiology, blood calcium on admission, white blood cell count on admission, whether CTSI score was ＞7, APACHE-Ⅱ score, Ranson score, presence or absence of peripancreatic fluid accumulation, presence or absence of infection, presence or absence of multiple organ failure (MOF), and whether PCD was performed at more than 1 week after admission. The t-test was used for comparison of continuous data between groups, and the chi-square test was used for comparison of categorical data between groups; a multivariate logistic regression analysis was used to determine the independent predictive factors for OPN. ResultsThe probability of OPN was 19.2% for SAP patients in the later stage. Compared with the PCD+OPN group, the PCD group had a significantly lower proportion of patients with MOF on admission ［27.0% (34/126) vs 70.0% (21/30), χ2=19.642, P＜0.01］ and a significantly higher proportion of patients undergoing PCD at less than 1 week after admission ［61.9% (78/126) vs 20.0% (6/30), χ2=17.121, P＜0.01］. MOF on admission (odds ratio ［OR］=5.343, 95% confidence interval ［CI］: 1.832-15.583, P＜0.05), initial PCD performed at more than 1 week after admission (OR= 5.518, 95% CI: 1.742-17.477, P＜0.05), and infection on admission (OR=5.016, 95% CI: 1.322-19.378, P＜0.05) were independent risk factors for subsequent OPN in SAP patients. ConclusionSAP with MOF on admission, initial PCD performed at more than 1 week after admission, and SAP with infection on admission are independent risk factors for subsequent OPN in SAP patients undergoing PCD in the early stage based on the step-up approach. Timely identification of related risk factors helps to grasp the timing of OPN in clinical practice and improve the clinical prognosis of SAP patients.