Teaching method for basal experiment, comprehensive experiment, design experiment and teach- ing practice in food microiological analysis were elaborated completely, and design experimental teaching was discussed stress. At the same time, Through introducing various experience of the design experiment teaching, resolvent and way of thinking against problem meeted in design experiment teaching were put forward.

Aiming at the frequent failures in the PACS clinical applications, a continuous availability (CA) image server with triple modular redundancy (TMR) is designed and used for failover at the CPU/memory level. The TMR voter, which is included in the CA image server, is applied to detection of failures. Through UW or FW SCSI interfaces, two mirror-image disks, two RAID controllers and two DLT controllers are respectively connected to the modules in the TMR and a complete CA image server is brought into being. The CA image server will replace the potential single point of failure (SPOF) in the PACS and increases its availability rate to 99.999%. The advantages of the TMR CA image server make itself well suitable for large-scale medical image network and database applications.
Equipment Failure ; Radiology Information Systems ; instrumentation

OBJECTIVETo investigate the pro-apoptotic effect of Her-2 targeted recombinant caspase-6 fusion protein on osteosarcoma SOSP-9607 cells.

METHODSRecombinant immunocasp-6 was generated by sequential fusion of the genes of a signal peptide, a single-chain Her-2 antibody (e23sFv), a PEA translocation domain (PEA aa253-364) and an active caspase-6. The immunocasp-6 gene was cloned into pCMV plasmid to construct a kind of eukaryotic expression vector, i.e. pCMV-e23sfv-PE II-caspase-6 (abbr. pCMV-6) and transfected into SOSP-9607 cells. Murine xenograft models were randomly divided into two groups that received i.m. injections of liposome encapsulated pCMV-6 or pCMV alone. The tumor volume and weight of the nude mice and the tumor weight of the cured mice were observed and statistically analyzed. The morphological changes of the tumors were examined with HE staining, apoptotic morphology of the tumor was observed by TUNEL staining and the gene expression was analyzed by immunohistochemical staining.

RESULTSThe tumor growth of the mice in the treatment group was significantly slower than that of the control group (P = 0.001). The weight of the nude mice in the treatment group was significantly higher than that of the control group (P = 0.0002). The tumor weight of the mice in the treatment group was significantly lower than that of the control group (P = 0.0006). HE and TUNEL staining of the tumor of nude mice in the treatment groups showed typical characteristics of apoptosis, while normal structure was found in the control group. Furthermore, caspase-6 was not found in the tumor and muscle tissues in the control group, but only in the treatment group by immunohistochemistry.

CONCLUSIONImmunocasp-6 can selectively recognize and bind to and kill HER-2 positive osteosarcoma cells, therefore, to offer some foundation for the clinical treatment of osteosarcoma.

ADP Ribose Transferases ; genetics ; Animals ; Apoptosis ; Bacterial Toxins ; genetics ; Bone Neoplasms ; metabolism ; pathology ; Caspase 6 ; genetics ; metabolism ; Cell Line, Tumor ; Exotoxins ; genetics ; Humans ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; Neoplasm Transplantation ; Osteosarcoma ; metabolism ; pathology ; Plasmids ; Random Allocation ; Receptor, ErbB-2 ; genetics ; Recombinant Fusion Proteins ; genetics ; metabolism ; Transfection ; Tumor Burden ; Virulence Factors ; genetics

Objective To learn today's nurse career pressure and identify relating factom that affectnurses'pressure.so as to provide some adequate measures for supervisors to reduce the career pressure of nurses to the highest degree.Methods The clinical nurses in Medicine and Surgical Departements were investigated with questionnaire.Results The career pressure of nurses mainly came from several aspects such as their work amount,schedule,nursing care of patients,working environment and resources.There were also other relating factors,for instance,age,marital status,educational level,title and health condition.Conclusions Supervisors should pay attention to release the career pressure of nurses and take nurses'mental health into account.Supervisors should also try to create a free and pleasant working atmosphere and give more understand and support to our nurses.

OBJECTIVEIn order to explore the role of toll-like receptors 2 (TLR2) in initiating inflammatory response, the expression of TLR2 of the liver and IL-18, TNF-alpha and IFN-gamma of plasma in fulminant hepatic failure was analysed.

METHODSD-galactosamine (D-Gal, 900 mg/kg) and lipopolysaccharide (LPS, 10 microg/kg) were administered intraperitoneally into the BALB/C mice. To evaluate the hepatic injury, serum transaminase (ALT and AST) and plasma IL-18, TNF-alpha and IFN-gamma were determined and the mortality was observed at various time points following the intraperitoneal injection. The level of TLR2 mRNA was measured by semiquantitative RT-PCR. The protein expression of TLR2 in the liver was detected by immunohistochemistry. The data was analyzed by SAS software.

RESULTSAfter 4 hours of intraperitoneal injection of D-Gal/LPS, the serum transaminase and plasma IL-18, TNF-alpha and IFN-gamma levels were elevated. The treated mice began to die at 7 hours. The mortality reached up to 80% at 10 h. TLR2 mRNA was expressed at a low level in liver tissues of normal mice, while it was significantly increased and maintained at a higher level following intraperitoneal injection with D-Gal/LPS. The expression of TLR2 protein was similar to that of the TLR2 mRNA, and the expression of TLR2 mRNA was positively correlated with the concentration of plasma IL-18, TNF-alpha and IFN-gamma (r=0.36, P=0.02; r = 0.48, P 0.003; r = 0.72, P<0.001) at different time points.

CONCLUSIONSOur results showed that TLR2 was involved in initiating and inducing the expression of proinflammation cytokines in this model of fulminant hepatic failure. The results suggest that adjusting the expression of TLR2 might be a new strategy in preventing the development of infectious diseases

Animals ; Galactosamine ; Interferon-gamma ; blood ; Interleukin-18 ; blood ; Lipopolysaccharides ; Liver ; metabolism ; Liver Failure, Acute ; chemically induced ; metabolism ; Male ; Mice ; Mice, Inbred BALB C ; RNA, Messenger ; biosynthesis ; genetics ; Toll-Like Receptor 2 ; biosynthesis ; genetics ; Tumor Necrosis Factor-alpha ; metabolism

OBJECTIVETo screen the mutations of RET proto-oncogene in sporadic patients with pheochromocytoma.

METHODSForty-two cases of sporadic pheochromocytoma were tested for mutations of RET gene. Of these 42 DNA samples, 12 were extracted from peripheral blood cells and 30 from paraffin-embedded pheochromocytoma specimens. The PCR product of exon 10 and exon 11 was used to molecular analysis of the RET proto-oncogene.

RESULTSAmong 42 patients, 2 were found to have RET gene mutations. One of mutations located at codon 634 (TGC>TAC) in exon 11 of RET proto-oncogene. Another one located at codon 632 (GAG>AAG).

CONCLUSIONSome patients with apparently sporadic pheochromacytoma were carrier of mutations, a routine genetic analysis for mutations of RET gene is indicated for these patients.

Adrenal Gland Neoplasms ; diagnosis ; genetics ; Adult ; Asian Continental Ancestry Group ; genetics ; Base Sequence ; China ; DNA Mutational Analysis ; Female ; Genetic Predisposition to Disease ; genetics ; Genetic Testing ; Humans ; Male ; Middle Aged ; Mutation ; Pheochromocytoma ; diagnosis ; genetics ; Polymerase Chain Reaction ; Proto-Oncogene Proteins c-ret ; genetics

OBJECTIVETo analyze the relationship between pesticide exposure and adverse pregnancy outcomes in famers.

METHODSA search was conducted to collect the articles about the relationship between pesticide exposure and adverse pregnancy outcomes published worldwide from 1990 to February 2012. Meta-analysis was performed on the collected articles using RevMan 4.2 software.

RESULTSTwelve articles were collected. Compared with the controls, the pesticide-exposed famers showed a combined odds ratio (OR) for spontaneous abortion of 1.52 (95%CI: 1.04 ∼ 2.21; P = 0.03), a combined OR for premature birth of 1.33 (95%CI: 1.09 ∼ 1.61; P = 0.005), a combined OR for dead fetus of 1.22 (95%CI: 1.16 ∼ 1.29; P < 0.01), a combined OR for stillbirth of 1.90 (95%CI: 0.58 ∼ 6.28; P = 0.29), a combined OR for birth defect of 2.02 (95%CI: 0.84 - 4.69; P = 0.12), a combined OR for low birth weight of 1.62 (95%CI: 0.60 ∼ 4.39; P = 0.34), a combined OR for neonatal death of 2.18 (95%CI: 0.54 ∼ 8.88; P = 0.28), and a combined OR for delayed conception of 1.43 (95%CI: 0.93 ∼ 2.18; P = 0.1). Pesticide exposure increased the risks for spontaneous abortion, premature birth, and dead fetus, but was not significantly associated with stillbirth, birth defect, low birth weight, neonatal death, and delayed conception.

CONCLUSIONPesticide exposure can cause adverse pregnancy outcomes in farmers, increasing the risks of spontaneous abortion, premature birth, and dead fetus.

Agriculture ; Female ; Humans ; Maternal Exposure ; Pesticides ; adverse effects ; Pregnancy ; Pregnancy Outcome ; Rural Population

BACKGROUNDRecently, the number of patients with prostate cancer who needed to be treated with radical prostatectomy increased rapidly in China. There is still a difference between clinical staging and the post-operative final pathologic staging; hence, an excellent tool for accurately predicting the pathologic stages of prostate cancer is needed urgently in clinical practice. The Partin tables are the most popular and widely used tool for predicting the pathologic stages of prostate cancer because of its high accuracy and ease of implementation. The aim of this study was to externally validate the accuracy of the three versions of the Partin tables in predicting the post-operative pathologic stages in Chinese patients with prostate cancer.

METHODSWe retrospectively analyzed the data from 203 patients with prostate cancer who underwent radical prostatectomies between June 2000 and May 2012. The accuracies of the three versions of the Partin tables in predicting the post-operative pathologic stages in Chinese patients with prostate cancer were evaluated using the area under the receiver operating characteristic curve (AUC).

RESULTSUsing the 1997, 2001, and 2007 Partin tables for predicting the current cases, the AUC of organ confinement (OC) was 0.877, 0.788, and 0.726; the AUC of extracapsular extension (ECE) was 0.525, 0.615, and 0.608; the AUC of seminal vesicle invasion (SVI) was 0.875, 0.649, and 0.820; and the AUC of pelvic lymph node invasion (LNI) was 0.808, 0.758, and 0.735 respectively.

CONCLUSIONSThe accuracies of the three versions of Partin tables in predicting OC, SVI, and LNI were good, especially the 2001 Partin table for SVI. In contrast, the accuracy of the three versions of the Partin tables in predicting ECE was fair. The 1997 Partin table was much better than the 2007 table in predicting OC, and the 2001 table in predicting SVI. The 2007 Partin table did not show any advantages.

Aged ; Humans ; Male ; Middle Aged ; Neoplasm Grading ; Neoplasm Staging ; Nomograms ; Prostate-Specific Antigen ; blood ; Prostatectomy ; Prostatic Neoplasms ; pathology ; surgery ; Retrospective Studies

Objective To evaluate the association between polymorphism of 5,10-methylenetrahydrofolate reductase C677T and risk of acute lymphoblastic leukemia (ALL).Methods Electronic search strategy was carried out among the databases from home and abroad to collect qualified research papers,according to the inclusion and exclusion criteria.Data on case-control studies on association between MTHFR C677T polymorphism and susceptibility to ALL were colleted and analyzed by models of TT vs.CC + CT or TT vs.CC through Meta-analysis.Stratified analysis was carried out according to different age groups (children or adult).Results In systematical analysis,the pooled odds ratios of MTHFR C677T genetype TT vs.CC + CT or TT vs.CC were 0.87(0.69-1.09 ) and 0.82 ( 0.63-1.06 ) respectively; in children' s group,the pooled odds ratios of MTHFR C677T genetype TT vs.CC + CT or TT vs.CC were 0.92 ( 0.79-1.08),0.88 ( 0.75-1.05 ) while in adult group,the pooled odds ratios of MTHFR C677T genetype TT vs.CC + CT or TT vs.CC were 0.45(0.26-0.77),and 0.41 (0.22-0.72) respectively.Conclusion The MTHFR gene 677T variant might not be associated with the risk of children's ALL but might be associated with a reduced risk on adult's ALL.

Objective To observe the clinical effect of stemless hip replacement.Methods The stemless hip replacement was performed in 40 cases and the effect evaluated.Results Follow-up for average 24.6 months(6-48 months)showed satisfactory outcomes in all cases after the stemless hip re- placement.Based on harris scale(averaging 90.6),the excellent result was,seen in 28 case(70%),good in eight(20%)and common in four(10%),with total excellence rate of 90%.Conclusions Stemless hip replacement is characterized by little trauma,less blood loss,less complications and fitting for revision. The general effects of this technique are satisfactory.It is especially suitable for the old and weak cases or the young cases who need hip replacement.The long term outcomes need further evaluation.