Objective To investigate the diagnostic value of determination of the genotypes in codon 12 and 13 of K-ras oncogene in blood samples of patients with pancreatic carcinoma(PC).Methods Blood samples were obtained from 54 patients with pathologically confirmed PC,and 33 healthy controls.The DNAs were obtained in these samples.and then genotype of K-ras mutation was detected by using the PNA-clamping real-time quantitative PCR.Then the correlation between the K-ras genotypes of blood DNA and the clinical characteristics was analyzed.Results K-ras mutations were found in 74.1%(40/54)of patients with PC.There was no such mutation in control samples.The mutations of K-ras was associated with age,lymph node and vessel invasion.poorly differentiated tumor,CA19-9,while it was not associated with sex,tumor location,size of tumor,clinical staging and pathological type.Conclusions The one-step method was highly sensitive for detecting K-ras mutation in blood samples.Detection of circular blood cells harboring K-ras mutation suggested the tumor was highly invasive with poor prognosis.

BACKGROUND:Our preliminary study found that the monocusp valves made of ultramicropore expanded
polytetrafluoroethylene (ePTFE) revealed no significant thrombus, calcification, or degradation 20 weeks after implanted into the descending aorta and the left pulmonary artery in sheep, which verified the good property of ePTFE. However, the surface of ePTFE in the left pulmonary artery was covered with obvious neointima.
OBJECTIVE: To assess the biocompatibility of phosphorylcholine-coated ePTFE.
METHODS:ePTFE surface was modified by phosphorylcholine derivative. Then the changes of surface shape, tensile stress at yield and elasticity modulus, water contact angle, and protein absorption capacity of ePTFE after surface modification were observed. (1) Hemolytic test: the leaching solution of phosphorylcholine-coated ePTFE, leaching solution of uncoated ePTFE, normal saline, and distiled water were added to the diluted human blood, respectively. (2) Platelet count test: the phosphorylcholine-coated ePTFE, uncoated ePTFE, high density
polyethylene, and Zymosan A were added to the whole blood samples from healthy volunteers, respectively.
(3) Platelet activation test: the phosphorylcholine-coated ePTFE, uncoated ePTFE, γ-Globulins, and Zymosan A
were added to the whole blood samples from healthy volunteers, respectively.
RESULTS AND CONCLUSION: The mean micropore diameter of ePTFE was significantly decreased after
phosphorylcholine coating (P < 0.001). The hydrophilicity and the ability of suppressing protein adsorption were
significantly strengthened after phosphorylcholine coating (P < 0.001). Phosphorylcholine coating did not influence
ePTFE in biomechanical properties and hemolytic test. The platelet count test and platelet activation test demonstrated that phosphorylcholine coating significantly improved anti-thrombus function of ePTFE. So, phosphorylcholine coating can enhance anti-thrombus function, suppress protein adsorption, and improve biocompatibility of ePTFE.

To investigate the dose effect of isocenter difference during IMRT dose verification with the 2D chamber array. The samples collected from 10 patients were respectively designed for IMRT plans, the isocenter of which was independently defined as P(o), P(x) and P(y). P(o) was fixed on the target center and the other points shifted 8cm from the target center in the orientation of x/y. The PTW729 was used for 2D dose verification in the 3 groups which beams of plans were set to 0 degrees. The γ-analysis passing rates for the whole plan and each beam were gotten using the different standards in the 3 groups, The results showed the mean passing rate of γ-analysis was highest in the P(o) group, and the mean passing rate of the whole plan was better than that of each beam. In addition, it became worse with the increase of dose leakage between the leaves in P(y) group. Therefore, the determination of isocenter has a visible effect for IMRT dose verification of the 2D chamber array, The isocenter of the planning design should be close to the geometric center of target.
Gamma Rays ; Humans ; Radiotherapy Dosage ; Radiotherapy, Intensity-Modulated ; instrumentation ; methods

Objective To assess the methylation patterns in CpG islands of SPARC genes and its relationship with clinicopathological parameters. Methods Bisulfite treatment of genomie DNA and sequencing analysis was used to study methylation patterns in the CpG islands of SPARC genes in fresh tissues from 6 cases of chronic pancreatitis, 6 normal pancreatic tissues, 17 pancreatic adenocarcinoma and the cancer adjacent tissues, as well as 6 normaI blood samples for normal control, and compared the results with clinicopathological parameters. Results WBC DNA showed no methylation of SPARC gene CpG islands. The methylation rates in CpG islands of SPARC genes in pancreatic adenocarcinoma, the cancer adjacent tissues, chronic pancreatitis and normal pancreatic groups (2, 3, 4, 5, 6, 7 CpG sites) were 61.6%, 47.1%, 37.5%, 24.7%, respectively. The methylation rates in CpG islands (1, 8, 9, 10, 11, 12 sites) were 52.0%, 28.7%, 16.7% and 0. The difference were statistically significant between the pancreatic adenocarcinoma and chronic pancreatitis as well as normal pancreas groups (P＜0.001), and the difference were not statistically significant between the pancreatic adenocarcinoma and the cancer adjacent tissues. CpG hypermethylation were not related to risk factors such as smoking, alcohol, history of CP, the tumor size, differentiation and TNM staging, lymph node metastasis. Conclusions CpG in SPARC gene extron 1 was hypermethylated in pancreatic cancer, and this may be an early event in the development of pancreatic cancer.

Objective To develop a quantitative immunohistochemistry assay for duck hepatitis B virus core antigen (DHB-cAg)in duck liver tissue.Methods By comparison with no repair antigen and repair antigen with high pressure,microwave and trypsin,the best solution of antigen retrieval was determined.By optimizing the parameter of image acquisition and de-ducting blank area,mean density of yellow areas was calculated using Image-Pro Plus 6.0 software.Using the assay devel-oped to determine the level of DHBcAg in liver tissue from duck infected by DHBV,anti-DHBV activity of DHBcMAb-TAT PTD conj ugate was examined.Results SABC method with no repair antigen was selected,which was better than other methods.DHBcAg expression in duck liver tissue could be objectively and accurately quantified by setting Image-Pro Plus 6.0 software parameters and calculating mean density of yellow areas.By comparison with the differences between mean densityat baseline of treatment and end of treatment,it was showed that DHBcMAb-TATPTD conjugate treatment dose-de-pendently reduced the levels of DHBcAg in liver tissue,which show that the assay developed could effectively evaluate the anti-DHBV activity of agent.Conclusion The immunohistochemistry assay developed in this study can objectively and accu-rately evaluate the level of DHBcAg in duck liver tissue.

Objective : To investigate the willingness to receive HIV testing in primary health service institutions (PHSIs) among young students in Wuhan City, so as to provide the evidence for improving the detection of HIV testing among young students. Methods: Fifteen PHSIs were sampled using a stratified random sampling method in 14 districts of Wuhan City, and school students at ages of 15 to 24 years were sampled from each district using a convenience sampling method. Participants' demographics, awareness of AIDS-related knowledge, HIV testing and willingness to receive HIV testing were collected using questionnaires, and factors affecting the willingness to receive HIV testing in PHSIs were identified among school students using a multivariable logistic regression model. Results : A total of 301 questionnaires were allocated, and 299 valid questionnaires were recovered, with an effective recovery rate of 99.34%. The respondents included 143 men (47.83%) and 156 women (52.17%), and had a mean age of (19.36±2.40) years; there were 223 respondents with an educational level of diploma and above (74.58%). The awareness of AIDS-related knowledge was 71.57% among the respondents, and 144 respondents had received AIDS-related health education in PHSIs (48.16%). There were 34 respondents that had received HIV testing (11.37%) and 203 respondents that were willing to receive HIV testing in PHSIs (67.89%). The respondents that were unwilling to receive HIV testing in PHSIs were mainly attributed to considering to be unlikely to get HIV infections (82.29%). Multivariable logistic regression analysis showed that school students who knew AIDS-related knowledge (OR=2.797, 95%CI: 1.583-4.941), knew free HIV counseling and testing services in PHSIs (OR=2.070, 95%CI: 1.123-3.814), and had received AIDS-related health education in PHSIs (OR=2.814, 95%CI: 1.573-5.032) were more willing to receive HIV testing in PHSIs. Conclusions There were 67.89% of school students that were willing to receive HIV testing in PHSIs in Wuhan City, and the willingness to receive HIV testing was correlated with the awareness of risk of HIV infections, and awareness and experience of AIDS control services in PHSIs.

Objective: To investigate the mental health status of female migrant workers in a city. Methods: From August to December, 2016, cluster random sampling was used to select female migrant workers aged 16-60 years from 10 districts of this city, and Symptom Checklist-90 (SCL-90) and a questionnaire on general status were used. Results: Among these female migrant workers, the detection rates of obsessive-compulsion, hostility, and depression were 6.62%, 4.18%, and 4.10%, respectively. There was a significant difference in the detection rate of mental health issues between the female migrant workers from different districts, with different occupations, or with different education levels (P<0.05) . Districts, occupation, and education level were associated with mental health issues, after adjustment for age (P<0.05) . Conclusion Although female migrant workers in this city have a high mental health level, the issues such as obsessive-compulsion, hostility, and depression should be taken seriously. Targeted mental health surveys and comprehensive interventions should be implemented to improve the mental health level of female migrant workers.

OBJECTIVETo investigate the effect of prescription compatibility on the pharmacokinetics of components from Dachengqi Decoction (DCQD, ) in rats.

METHODSTwenty-four male rats were randomly and equally divided into the DCQD group, Dahuang (Radix et Rhizoma Rhei, Polygonaceae) group, Houpo (Magnolia officinalis Rehd., Magnoliaceae) group, and Zhishi (Fructus Aurantii Immaturus, Rutaceae) group. The blood samples were collected before dosing and subsequently at 10, 15, 20, 30, 45 min, 1, 2, 4, 8, and 12 h following gavage. The levels of aloe-emodin, rhein, emodin, chrysophanol, honokiol, magnolol, hesperidin, and naringin in rat serum were quantified using a liquid chromatography tandem mass spectrometry (LC-MS/MS) method for pharmacokinetic study.

RESULTSThe area under the curve (AUC), mean retention time (MRT), the peak concentration (C(max)) of aloe-emodin, rhein, emodin, and chrysophanol in the DCQD group were significantly different compared with the Dahuang group (P <0.05, respectively). The mean plasma concentration, C(max), and the absorption of Dahuang's component in the DCQD group were obviously lower at each time point than those in the Dahuang group, while the elimination process of Dahuang's component was obviously delayed (P <0.05). Half-lives of aloe-emodin, chrysophanol, and rhein were also extended in the DCQD group (P <0.05, respectively). In the DCQD group, the mean plasma concentration, AUC, C(max) and absorption of honokiol, and magnolol were significantly lower (P <0.01, respectively) at each time point than those in the Houpo group, while the drug distribution half-life time (T(1/2α)), the drug eliminated half-life time (T(1/2β)), MRT, and time of peak concentration (T(max)) were significantly delayed (P <0.05, respectively). Pharmacokinetic parameters of hesperidin and naringin in the Zhishi group were not significantly different as compared with the DCQD group (P >0.05, respectively), while the MRT of naringin was significantly longer.

CONCLUSIONSThe compatibility in Chinese medicine could affect the drug's pharmacokinetics in DCQD, which proves that the prescription compatibility principle of Chinese medicine formulations has its own pharmacokinetic basis.

Administration, Oral ; Animals ; Anthraquinones ; administration & dosage ; blood ; pharmacokinetics ; Biphenyl Compounds ; administration & dosage ; blood ; pharmacokinetics ; Drug Incompatibility ; Emodin ; administration & dosage ; blood ; pharmacokinetics ; Flavanones ; administration & dosage ; blood ; pharmacokinetics ; Hesperidin ; administration & dosage ; blood ; pharmacokinetics ; Lignans ; administration & dosage ; blood ; pharmacokinetics ; Male ; Plant Extracts ; administration & dosage ; blood ; chemistry ; pharmacokinetics ; Rats ; Rats, Sprague-Dawley

Objective To evaluate the diagnostic and therapeutic effects of endoscopic retrograde cholangiopancreatography (ERCP) in biliary papillomatosis. Methods Data of 6 patients, who underwent ERCP and diagnosed as biliary papillomatosis from 2000 to 2008, were retrospectively analyzed. Results There were 3 males and 3 females, with the mean age of onset at 72.8 years (range 52-83 years). Recurrent cholangitis and jaundice were common presentations in all patients, with 5 patients having right upper abdominal pain and 3 others exhiting fever and algor. History of partial hepatectomy was observed in 2 patients. Endoscopic findings included dilated papillary orifice with mucin discharge in 5 patients and papillary-occupying lesion in 1 patient. Multiple filling defects in the lumen of the biliary system in dilated common bile duct were detected in all patients, accompanied with extra-hepatic ducts dilatation in 3, right intra-hepatic duct dilatation in 1, and major pancreatic duct dilation in 1. Of 6 patients, 5 underwent multiple ERCP, inclucling stents and endoscopic nasobiliary drainage (ENBD), and have survived for 10-30 months. Another 83-year-old patient underwent palliative endoscopic treatment with balloons, baskets and ENBD, but died of cholangitis 10 days after the procedure. Conclusion This case series reports the typical endoscopic findings of biliary papiliomatosis. For inoperable or postoperative recurrent patients, endoscopic palliative treatment is a safe, convenient and effective procedure.

ObjectiveTo investigate the impacts of different serum creatinine detection methods,including Jaffe and enzymatic methods,on the efficacy of different GFR estimation equations in CKD patients in China.MethodsrGFR of 176 patients with CKD were determined by dual plasma sample method 99mTc-diethylenetriamine pentaacetic acid (99mTc-DTPA) plasma clearance rate.Serum creatinine was detected with four kinds of creatinine reagents from different manufacturers.Cockcroft-Gault Equation corrected for body surface area (CG/BSA),simplified Modification of Diet in Renal Disease (MDRD) Study equation,IDMS-traceable MDRD equation,CKD epidemiology collaborative research (CKD-EPI) equation and two Chinese simplified MDRD equation (project group equation 1,2) were applied to calculate estimated GFR (eGFR)respectively.eGFRwerecomparedwithrGFRforthecorrelation, deviation, precisionand30％ accuracy.ResultsThe mean rGFR of 176 patients with CKD,was [ 40.70 ( 19.41 -84.35 ) ] ml · min- 1 ·( 1.73 m2 ) -1.For all GFR estimation equations,there were significant differences in eGFR results between enzymatic method and Jaffe method,when analyzed by the Wilcoxon signed-rank test.eGFR results assessed by two enzymatic creatinine detection systems showed no significant difference,while eGFR results analyzed by two Jaffe detection system were significantly different.The intraclass correlation coefficient (ICC) of eGFR and rGFR ranged from 0.879 to 0.923 by Jaffe method,while from 0.925 to 0.946 by enzymatic creatinine method.ICC and Pearson correlation analysis revealed a significant correlation between eGFR and rGFR,and the correlation was better when using enzymatic method.Bland-Altman plots indicated that large deviation occurred in the high value area of GFR using various equations.However,deviation with the enzymatic creatinine method was smaller than that with the Jaffe method. When rGFR ≥ 60 ml · min- 1 ·(1.73 m2) -1,the 30％ accuracy of eGFR using enzymatic creatinine method for all six equations was between 68.3％ and 90.0％,while it was between 41％ and 75％ when using Jaffe method. The 30％ accuracy of eGFR using enzymatic creatinine method was significantly higher than that using picric acid method for these equations except for the project group equation 1.When rGFR ＜60 ml · min -1 · ( 1.73 m2 ) -1,the 30％accuracy of eGFR using both methods was between 39.7％ -49.1％,40.5％ -52.6％respectively,and the difference of data showed no statistical significance.For the same equation,there was a significant differernce in 30％ accuracy of eGFR between two enzymatic creatinine detection systems,while there was no significant differernce between two Jaffe creatinine detection systems.ConclusionsA significant difference was demonstrated in the same GFR evaluation equation using two different creatinine detection methods (Jaffe method and enzymatic method).The correlation between rGFR and eGFR,the degree of deviation,and accuracy of eGFR results assessed by enzymatic creatinine method were better than those by Jaffe method.The eGFR results assessed by different enzymatic detection systems revealed no significant difference.