The producing condition and properties of chitinase secreted by Nomuraea rileyi strain CQ031021 were studied.The optimal conditions for the strain to produce chitinase are 6 days of 28℃ with the initial pH 6.0,and the liquid medium containing 2.0% glucose as its carbon source and 0.6% peptone plus 0.6% beef extract as nitrogen source after inoculating dosage 2mL suspension of conidia(1?107/mL).The optimal temperature and pH for enzyme activity is 50℃ and 6.0,respectively,while the activity can be enhanced by Tween-80 and inhibited by SDS.The enzyme activity is stable under 40℃ and in pH range of 5.5～6.5.

Objective To determine the value of helical computed tomography (HCT) and color doppler flowing imaging (CDPI) in evaluating the resectability of pancreatic cancer. Methods The clinical data of 114 patients with pancreatic cancer who had been admitted to the Affiliated Hospital of North Sichuan Medical College from January 1995 to December 2002 were retrospectively analyzed. The values of HCT and CDPI in assessing the resectability of pancreatic cancer were determined according to the results of operation and pathological examina-tion. All the data were analyzed by chi-square test and Fisher exact probability. Results Of all patients, 109 were examined by HCT, 97 by CDPI and 96 by HCT+CDPI. For patients examined by HCT, the resection rates of pancreatic head cancer, pancreatic body and tail cancer and total pancreatic cancer were 45.3% (39/86), 26.3% (5/19) and 0 (0/9), respectively. The resection rate of pancreatic head cancer was higher than that of pancreatic body and tail cancer (χ2=8.965, P<0.05). With the increase of tumor size, the invasion rate and metastasis rate were increased and the resection rate was decreased (z=6.15, 5.35, 7.18, P<0.01). The sensitivity rate and specificity rate were 77.8% and 82.2% of HCT, 73.3% and 80.6% of CDPI, 90.6% and 92.4% of HCT+CDPI in assessing the resectability of pancreatic cancer. The values of Kappa identity test of HCT, CDPI and HCT+CDPI were 0.58, 0.52 and 0.82, respectively. Conclusions Combined application of HCT and CDPI can further improve the accuracy in assessing the resectability of pancreatic cancer.

BACKGROUND:After arthroscopic knee surgery, deep vein thrombosis easily occurs. Currently, there were no specific clinical manifestations in deep vein thrombosis, so a fast, convenient and reliable risk assessment tool was needed to evaluate the clinical high-risk groups for prevention and intervention. The effectiveness of Caprini Risk Assessment Scale used in thrombosis risk assessment has been confirmed by a large number of researches, but the current domestic research is less.
OBJECTIVE:To verify the validity of Caprini risk assessment scale in evaluations of high deep venous thrombosis risk patients among knee arthroscopy patients, and to explore effective strategies for prevention of deep vein thrombosis in patients undergoing knee arthroscopic surgery.
METHODS: A case-control study design was used to colect 49 deep vein thrombosis patients admitted to the Department of Orthopedics, Renhe Hospital of Three Gorges University from January 2008 to June 2015 as case group, and randomly selected 98 patients admitted during the same period of non-deep vein thrombosis patients as control group. Caprini risk assessment scale was used to assess risk assessment and risk grading of deep venous thrombosis, and to explore the correlation between risk classification and risk of deep vein thrombosis.
RESULTS AND CONCLUSION: (1) Basic conditions comparison: application time of tourniquet, the proportion of smoking patients, and proportion of deep venous thrombosis and (or) the history of pulmonary thromboembolism were higher in the case group than in the control group (P < 0.05). (2) Caprini score was significantly higher in the case group than in the control group (P < 0.001). In the case group, the proportion of very high risk patients (53%) was highest, folowed by high risk (25%), totaly 78%. In the control group, the proportion of high risk patients (32%) was highest, folowed by low risk (29%). Significant differences in above risk degree analysis were identified between the two groups (P< 0.001). (3) Deep venous thrombosis and (or) the history of pulmonary thromboembolism was positively correlated with Caprini score in the case and control groups (P < 0.05). Caprini score was positively associated with application time of tourniquet in the case group (P< 0.05). (4) Logistic regression analysis of Caprini risk classification and the risk of deep vein thrombosis: with increased caprini risk classification, the risk of deep vein thrombosis increased significantly. The risk of deep venous thrombosis in patients with high risk and very high risk was 2.130 and 11.786 times of patients with low risk, respectively. (5) These results indicate that Caprini risk assessment model can effectively assess the risk of deep vein thrombosis among patients receiving knee arthroscopy.

Objective To establish a TaqMan real-time fluorescent quantitative PCR to detect Vibrio vulnificus based on hemolysin gene(vvhA)that coding cytolysin.Method By using software Primer Express, the PCR primers and TaqMan probe,which located in the conserved region of vvhA gene sequence,were designed for establishment of a TaqMan real-time fluorescent quantitative PCR to detect 100 bp amplicon from V.vulnificus DNA.A recombinant plasmid pMD19-vvhA100 as a positive control during detection was constructed using gene cloning technique.Minimal amplification cycles(Ct value)and fluorescence intensity enhancement (△Rn value)were used as observing index to optimize the reaction conditions of the TaqMan real-time fluorescent quantitative PCR.The DNAs with different concentrations from V.vulnificus and other eight bacteria and pMD19- vvhA100 were applied as templates to determine the specificity,sensitivity and reappearance of the TaqMan real- time fluorescent quantitative PCR.ICR mice were intraperitoneally,subcutaneously and orally infected with V. vulnificus,respectively.The detection effect of the TaqMan real-time fluorescent quantitative PCR was measured using the specimens of peripheral blood,subcutaneous tissue and intestinal content collected from the infected mice.Results The established TaqMan real-time fluorescent quantitative PCR showed positive results only for V. vulnificus DNA and pMD19-vvhA100.The detection effectiveness of the TaqMan real-time fluorescent quantitative PCR was as high as 0.01 ng of V.vulnificus DNA or 103 copies of pMD19-vvhA100.The SD values of the detection results repeated for three times using pMD19-vvhA100 with different concentrations were lease than 0.79. The detection results of TaqMan real-time fluorescent quantitative PCR were positive for all the specimens of peripheral blood and subcutaneous tissue.Conclusions The TaqMan real-time fluorescent quantitative PCR established in this study for V.vulnificus vvhA gene detection has advantages such as quickness,stability, sensitivity and specificity,indicating this method can be used for clinical laboratory diagnosis of septicemia and wound infection caused by V.vulnificus.

Objective To observe the pathological changes of bone hydatid cyst of meriones meridianus after radiation therapy,and to investigate the clinical effect of radiotherapy on bone hydatid disease.Methods Ascus was dissected sterilely from sheep liver that naturally infected with Echinococcus granulomas,sheared and sac skin removed.Then it was washed and precipitated with 0.9％ sterile saline for 3 times,and scolex was HE stained and counted,from which a 20 ml suspension was made containing 12 × 106/L of scolex.Health meriones meridianus (referred to as gerbil) 140,male and female were in each half,aged 2 to 3 months,body weight(38 ± 6)g,were involved in the study.Gerbil was injected a 0.2 ml suspension containing Echinococcus granulomas scolex into hind tibial periosteum,and X-ray was taken 12 months after the injection.According to the bone destruction in the vaccination site,gerbil hindleg tibia with clear jagged bone destruction was treated as inclusion criteria,and 72 animal were selected as gerbil bone hydatid disease animal models,male and female were in each half.A tatal of 72 gerbils were randomly divided into 4 groups:control group,40 beequerel(Gy) group,50 Gy group and 60 Gy group,18 rats in each group,male and female in each half.The model animals were treated with radiotherapy for 5 times,with 2 d interval,and radiation dose was 300 cGy/min.Each group of gerbils was sacrificed after radiotherapy,bone Echinococcus granulomas cysts was taken out sterilely,and observed by light and electron microscope.Intracapsular cyst fluid was extracted,washed and precipitated with 0.9％ sterile saline repeatedly,and and the pellet was HE stained for observation of scolex morphology and activity by light microscope.Results The morphology and activity ofEchinococcus granulomas in cystic fluid in control group were normal; the morphology and activity of Echinococcus granulomas were still normal in the 40 Gy group,and Echinococcus granulomas was not stained red; but those were abnormal,deformation and atrophy and stained red in the 50 Gy group; and were stained red,deformed,fractured and were wrapped by unknown in the 60 Gy group.By light microscope,the germinal layer,cuticle layer,brood capsule and histological structure of protoscolex were basically normal in irradiated region in the control group.The pathological changes of hydatid cyst in the 40 Gy group were mainly degeneration,structure of hydatid cyst was abnormal,stratum corneum was extensive edema,germinal layer became thinner and the fertile cyst was rare.The main pathological change of hydatid cyst in the 50 Gy group was that corneous layer was widely fractured,and the germinal layer was edema,buckling folds,cells decreased,rare seen brood capsule and scolex; the main pathological changes of hydatid cyst were mainly necrosis in the 60 Gy group,cuticle was extensive fault,stratum corneum and germinal layer was separated,germinal layer was atrophy and disorder,no brood capsule and scolex.By electron microscope,cuticle structure of Echinococcus granulomas cyst was clear,microvillus arranged neatly,morphology and structure of the cell and organelle in cytoplasm were normal in the control group.There were many inflammatory cells infiltrating germinal layer of Echinococcus granulomas cyst,microfilament and contents in microfilament were reduced in the 40 Gy group.Microvillus of Echinococcus granulomas disappeared,nuclear membrane was unclear,endoplasmic and mitochon eclasis,lymphocyte nuclear chromatin was clumping and edge set and in circular permutation in the 50 Gy group.Microvillus disappeared,perinuclear membrane indistinct and ruptured,parts of nucleoli were fragmented and marinated,endoplasmic reticulum was extensive expansion,mitochondria was pyknosis and obvious vacuolization,lymphocyte nuclear chromatin clumping and edge set,lysosomes and macrophage emerge in the 60 Gy group.Conclusions Radiotherapy can destroy the morphology and structure of bone hydatid cyst,radioactivity at 50 Gy has a lethal effect on hydatid cyst.Radiation treatment of bone hydatid disease has a good clinical effect.

This article reviewed pharmacological study development of Punica granatum L. both at home and abroad in recent years. P. granatum has a long medical usage history. Different parts of P. granatum have wide applications in both traditional Chinese medicine (TCM) and other ethnic medicine. Its main chemical compositions were tannins, flavonoids, alkaloids and organic acids. It has obvious pharmacological activities. In recent years, the pharmacological research progress on P. granatum in terms of antibacterial, antiviral, hypoglycemic, antitumor, adjusting blood lipids, antioxidant, and immunoregulation has rapid development. The scientific collection and analysis on effects and new pharmacological research results of P. granatum are hoped to provide references for the study, clinical application, development and utilization of P. granatum and its products.

Purpose To investigate the histopathological features of cystic lung diseases ( CLD) , and to discuss the timing of clinical interventions. Methods HE and immunohistochemical staining were performed and reviewed in 125 cases of CLD. Results 125 ca-ses of CLD aged from birth to 11 years and 6 month, with an average age of 23. 0 months, median age 15 months, of which 60 cases were less than 1 year (48. 0%). 75 cases were male and 50 cases female, with male to female ratio of 1. 5 ∶ 1. Grossly, 50 cases showed single or multiple cysts with the size 0. 5 ~8. 0 cm in diameter, which did not communicate with bronchial cavity. 18 cases showed honeycomb cysts with the diameter of 0. 1~2. 0 cm. 26 cases were solid lesions without visible cysts. 21 cases were observed lung abscess with thick and rough wall and pus inside. 7 cases of emphysema showed microcysts with crepitation. 2 cases were identi-fied cystic and solid masses, with fish-fresh like cut surface. Histopathologically, 94 cases (75. 2%) were related to congenital bron-chopulmonary dysplasia in 125 cases of CLD, in which there were 59 patients (47. 2%) of congenial pulmonary airway malformation (CPAM), including 29 cases of type 1 (49. 2%), 18 cases of type 2 (30. 5%), and 12 cases of type 4 (20. 3%), there were 26 ca-ses (20. 8%) of pulmonary sequestration, including 15 cases of intralobar type (57. 7%) and 11 of extralobar cases (42. 3%), 5 ca-ses were complicated with CPAM type 2, 8 cases were bronchial cyst (6. 4%) and 1 case of enteric cyst (0. 8%). Acquired lesions were detected in 31 cases (24. 8%), including 21 cases of infected lung abscess, 1 case of fungal abscess. 7 cases of emphysema, and 3 cases of pleuralpulmonary blastoma (typeⅠ1 case and typeⅡ2 cases). Conclusion Pediatric CLD is characterized as com-plexed categories. The prognosis depends on correct pathological diagnosis, combined with imaging evaluation and appropriate timing of surgery.

L-amino acid transporter 1 ( LAT1) is a member of L-amino transporter family and an important heterodi?meric amino acid transporter that belongs to subfamily of SLC7. LAT1 mainly mediates trans-membrane transportation of those neutral amino acids that had cyclobenzene or long side chains with high molecular mass such as L-Leu, L-Met and L-Phe as well as some amino acid analogues such as melphalan, L-DOPA and thyroxine in a Na+and ATP-independent diffu?sion. As LAT1 was abnormally overexpressed in various transformed cell lines, it might be related with tumor stage and prog?nosis. It is not only a biomarker that specifically expressed in some tumor cells but also plays an important role in tumor diag?nosis and therapy. Here we demonstrate the structure of LAT1 and its mechanism in transport peculiarity. We also reviewed the development of LAT1 in tumor diagnosis and treatment.

Objective To establish and evaluate criteria applied to review of complete blood counts (CBC)and differential results from automated hematology analyzers.Methods Temporary criteria were established by using alarm system of XE-2100 automated hematology analyzer and by consulting the 41 suggested rides of international consensus group.2 795 out-and in-patient samples were run as clinical samples.Stained blood films were prepared and manual differential with smear review were performed on all samples.Statistical analysis was done for each temporary rule and instrument flag which indicated abnormal cell quantity and morphology.Results Of all rules,instrument flags of ‘Immature Gran/Left Shift?’, ‘ Atypical Lympho?’and‘NRBC(nucleated red blood cell)?’showed most frequent false positive and false negative instrument flag.Evaluation on rnles about cell quantity change showed false positive and false negative rates were both low.Results of morphology evaluation showed that true positive rate was 17.44%, false positive rate was 15.82%,true negative rate was 63.49%,false negative rate was 3.25%.‘ Atypical Lymphocyte?’,‘Immature Gran?’and‘blast?’were the most frequent false positive flags.According to those results and clinicians opinions,our hematology review criteria for action following automated CBC and leukocytes differential was established.Conclusions The hematology review criteria have high true positive rate and low false negative rate.To clinical hematology laboratory using automated hematology analyzer,new criteria can reduce work load,bring lower false negative rate and higher work efficiency.

Not Abstract.