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 study the cytopathogenic effect of epidemic hemorrhagic fever with renal syndrome virus (HFRSV) on renal tubular cells(RTC). Methods Human fetal renal tubular cells (HFRTC) were cultured in vitro. HFRTC infected or not infected by HFRSV were observed by using trypan-blue stain and transmission electron microscopy(TEM). Viral-mRNA was detected by in situ molecular hybridization. Results (1) HFRSV could directly infected HFRTC: (2)The death rate of HFRTC in the infection group was significantly higher than that in the control grou 1 to 4 weeks after infection; (3) Injuries of cell membrane and cell organs after infection with HFRSV were significantly earlier and more severe as compared to control by means of TEM. Conclusion HFRSV can directly damage renal tubular cells (RTC ), which contributes to the pathogenesis of hemorrhagic fever with renal syndrome (HFRS).

ObjectiveTo evaluate the feasibility and accuracy of velocity vector imaging (VVI) in assessing ventricular function in children with single ventricle after cavopulmonary connection.Methods Thirty children with single ventricle after cavopulmonary connection were enrolled in this study,30 agematched normal children were served as control group.The systolic peak velocity,displacement,strain and strain rate in this two groups measured in 6 segments by VVI were compared.dp/dt of single ventricle was estimated by atrioventricular regurgitation using simplified Bernoulli equation.Results Strain and strain rate were significantly lower in all 6 segments in children with single ventricle after cavopulmonary connection compared with values in normal children( P ＜0.05,respectively),strain rate of the basal segment at the rudimentary chamber correlated best with dp/dt (r =0.72,P ＜0.01).Conclusions Segmental ventricular dysfunction was observed in children with single ventricle after cavopulmonary connection,and could be assessed accurately using velocity vector imaging.

Objective:To elucidate the phenomenon of natural remission or even natural recovery of asthma at puberty and put forward the laboratory evidences for the prevention and treatment of asthma Methods:The serum ECP, Tryptase and aeroallergen specific IgE antibody in 23 cases of asthmatics with remission at puberty, 15 cases of asthmatics, 29 cases of normal controls were detected respectively, using Pharmacia Unicap100 Type EIA fluorecent instrument Results: The positive rate of specific IgE antibody in asthmatics with remission at puberty was 66 66%, that in group of asthma was 71 42% and that in normal controls was 6 89% The positive rates of specific IgE in the former two groups were almost the same, and were significantly higher than that in normal controls (P

By applying the satellite-based distance rescue system and telemedical technology to the emergency treatment of the wounded from the Wenchuan Earthquake,we successfully conducted joint telemedical consultations with the guidance of the top specialists from various distant areas and saved 3 critically wounded patients.Our experience has shown that telemedical consultations may give a full play to the functions of large rescue organizations and the abilities of the top specialists,improve the treatment and expand war-time medical support.

DC-specific intercellular adhesion molecule-3-grabbing nonintegrin (DC-SIGN) is specific receptor on Dendritic cells, and plays a pivotal role on antigens presentation. Uptodate, the clear regulation mechanisms for DC-SIGN expression are not available.IL-4 is one of the most important cytokines inducing DC-SIGN production, while, NF-κB is an important transcription factor controlling signaling transduction. Both IL-4 and NF-κB are closely related to DC-SIGN regulation. NF-κB and IL-4 actions on DC-SIGN promoter activity, DC-SIGN expression as well as interactions between IL-4 and NF-κB were investigated in THP-1 cell. It was found that the mutation of NF-κB binding site in DC-SIGN promoter results in DC-SIGN promoter activity decrease about 50%.NF-κBp50 stimulates DC-SIGN expression in THP-1 cells. IL-4 upregulates DC-SIGN expression on THP-1 cells as well as NF-κB production. These data reveal that NF-κB is associated with IL-4 induced DC-SIGN expression.

ObjectiveTo investigate the effects of two health education models on the psychology and nutrition of patients waiting for cadaveric renal transplantation.Methods A total of 125 patients waiting for cadaveric renal transplantations were involved in our study.They were diagnosed with chronic renal failure in our hospital during September 1, 2009 to August 30, 2010.The patients were randomly divided into control group (n = 62) and observational group(n = 63).Patients in the control group received traditional health education with routine preoperative education during hospitalization.In the observational group, full-time nurses assessed the nutrition status of each patient and monitored the data. The observational patients were followed up and were given dietary guidance and knowledge of transplantation.Various kinds of education formats were adopted in observational group to provide communication opportunities between patients and surgeons in charge as well as patients who underwent transplantation.Psychological testings of patients in both groups were tested by self-rating anxiety scale (SAS) and self-rating depression scale (SDS) before and after the health education.Triceps skinfold thickness (TSF), mid-arm muscle circumference (MAMC) and biochemistry index were also tested.Psychological and nutritional status of patients in the two groups was compared.ResultsThere were no significant differences in scores of the SAS, SDS, TSF, Hb, and albumin (Alb) between the two groups (all P＞0.05) before health education.After health education, SAS and SDS in observational group were lower than those in the control group (40.02 ±9.05 vs 47.05 ± 10.32,42.70 ± 10.01 vs 50.83 ± 10.12; both P＜0.01).Both TSF and Hb were elevated after education (P ＜ 0.001 or 0.05).Alb was significantly elevated in the observational group [(35.67 ±6.19)g/L vs (37.48 ±5.09)g/L, P ＜0.01].ConclusionComprehensive and various health education methods can significantly alleviate mental stress and improve nutrition of the patients waiting for kidney transplantation, which is helpful for patients facing disease positively and having a better quality of

OBJECTIVE:To study the apoptosis of human leukemic cells induced by Dihydroartemisinin and its molecular mechanism.METHODS:Human leukemia K562 cells were treated by Dihydroartemisinin.The inhibitory effect on cell proliferation was assayed by MTT.Fluorescence microscopy was applied to observe the presence of apoptosis.The expression of caspase-3 was assayed with reverse transcription-polymerase chain reaction(RT-PCR).Levels of mitochondrial and cytoplasmic cytochrome C were determined using Western blot.RESULTS:After treatment with Dihydroartemisinin for 48 hours,the IC50 values of human leukemia K562 cells were 8? 10-5mol? L-1 detected at a wavelength of 570nm by MTT.Distinct morphology changes of cell apoptosis such as karyopyknosis and conglomeration were observed by Hoechst33342/PI staining.RT-PCR assay showed the expression of Caspase-3.Western-blot detection showed the decrease of mitochondrial cytochrome C concentration but the positive expression of cytoplasmic cytochrome C concentration.CONCLUSION:Dihydroartemisinin could inhibit proliferation and induce apoptosis of human leakemic K562 cells,this may partially attributed to the promotion of the delivery of cyt-c and the activation of caspase-3.

OBJECTIVE:To detect the expression of genes of leukemia cell line K562 treated by artemisinin using the gene chip technology and to study the mechanism of artemisinin in the inhibition of leukemia cell line K562 on the molecular level. METHODS:K562 cells were treated with artemisinin for 24h,and then the morphological change of K562 cells were observed under invert microscope and fluorescence microscope. The cell cycle state was examined by flow cytometry analysis (FCM). Total RNA samples were extracted and reverse transcribed to cDNA. Cy3-labelled cDNA samples were hybridized with gene chips.The hybridization results were detected by Gene Pix 4100A. RESULTS: Under invert microscope,different degree of shrinkage of K562 cells was noted,karyoschisis was reduced,cell density was decreased and the numbers of drift cells were increased.Under fluorescence microscope,caryotin was highly concentrated,marginalized and agglomerated to relucent clump,i.e.apoptotic body. Flow cytometric analysis showed that ratio of cells in G2 phase increased markedly. Hybridization analysis showed down-regulation of cyclin D1,cdk4,cdk2,cdc2,DNA-PK,DNA-TopoI,mcl-1,erk,jnk and VEGF in the artemisinin-treated K562 cells.CONCLUSION: The mechanism for artemisinin to inhibit the proliferation of leukemia cell line K562 is related to its action to alter the gene expression of certain regulatory substances involved in cell cycle and induce apoptosis of leukemia cell line K562.