QA(Quality Assurance)of CT offers dependable guarantee for the daily work of hospital.Slice width is an important characteristic of the all parameters.In this study,we gained a new method to detect slice thickness work by computer from the analysis of the CT image of the phantom named Catphan412 in a programmed way.

The Telomeric Repeat Amplification Protocol(TRAP)and its modified versions change the size and/or the ratio of the telomerase products in the amplification stage of the assay.Based on TRAP,a useful method was developed for detecting telomerase activity in rice.A special precursor primer and a special reverse primer and conducted two steps of PCR cycles were designed.GENE Genius? Bio-imaging System was applied for this quantitative analysis for exploring telomerase activity and its optimal reaction conditions.The method ensured that the optimal reaction conditions for the telomerase was 19℃,13minutes,at a concentration of 0.28 u g/? l.A quantitative analysis method was established for detecting telomerase activity in rice.With this method,we detected telomerase activity in roots,young leaves and young panicles of six parental lines of hybrid rice.The results show that young panicles have the highest telomerase activity,demonstrating that telomerase activity is closely related to the cell vitality in plants.

Adolescent ; Adult ; Aged ; China ; epidemiology ; Chronic Disease ; epidemiology ; Female ; Humans ; Male ; Middle Aged ; Population Surveillance ; Risk Factors ; Young Adult

Objective To investigate the effects of stress hyperglycemia on prognosis in patients with severe cerebral vascular diseases.Methods A retrospective analysis was conducted.416 patients with severe cerebral vascular diseases confirmed by radiological imaging admitted to intensive care unit (ICU) of Guangdong General Hospital from December 2013 to June 2015 were enrolled.According to the values of randomise blood glucose (RBG) and glycosylated hemoglobin (HbA1c) and diabetes history,the patients were divided into euglycemia group (RBG ＜ 11.1 mmol/L,HbA1c ＜ 0.065,without diabetes history),diabetes group (RBG ≥ 11.1 mmol/L,HbA1c ≥ 0.065,with diabetes history),and stress hyperglycemia group (RBG ≥ 11.1 mmol/L,HbA1c ＜ 0.065,without diabetes history).The nosocomial infection rate,the length of ICU stay and 28-day mortality were compared among the three groups.Survival analysis was performed using Kaplan-Meier method,and multivariate Cox proportional hazard model was used to estimate the risk of death.Results Among 416 patients,there were 40 cases with stress hyperglycemia,46 with diabetes and 330 with euglycemia,with the incidence of stress hyperglycemia of 10.81％ (40/370).The nosocomial infection rates in the stress hyperglycemia group and diabetes group were significantly higher than those of the euglycemia group [55.00％ (22/40),52.17％ (24/46) vs.18.79％ (62/330),both P ＜ 0.01],and the length of ICU stay was significantly longer than that of the euglycemia group (days:16.53 ± 6.26,15.79 ± 8.51 vs.9.23 ± 4.29,both P ＜ 0.01).No significant differences in nosocomial intection rate and length of ICU stay were found between stress hyperglycemia group and diabetes group (both P ＞ 0.05).The 28-day mortality rate in stress hyperglycemia group was significantly higher than that of diabetes group and euglycemia group [47.50％ (19/40) vs.26.09％ (12/46),10.30％ (34/330),P ＜ 0.05 and P ＜ 0.01].It was showed by Kaplan-Meier survival analysis that 28-day cumulative survival rate in stress hyperglycemia group was significantly lower than that of euglycemia group and diabetes group (log-rank =6.148,P =0.043).It was showed by Cox death risk analysis that stress hyperglycemia was the risk factor of death in patients with severe cerebral vascular disease [hazard ratio (HR) =1.53,95％ confidence interval (95％CI) =1.04-1.26,P =0.001].Conclusion The patients with stress hyperglycemia may have a higher 28-day mortality and a poorer prognosis compared with those with diabetes and normal blood glucose in severe cerebral vascular diseases.

Objective To study the CT and MRI features of benign ovarian cystic lesions (BOCL) and to improve the understanding of imaging features.Methods CT and MRI findings were retrospectively reviewed and analyzed in 48 patients with BOCL proved by surgical pathology.CT scan was performed in 35 cases, among which 20 cases were performed with CT enhancement scan;MRI scan was performed in 8 cases, among which 3 cases were performed with MRI enhancement scan and diffusion weighted imaging(DWI).Five cases were performed with both CT and MRI.Results There were 11 cysts (3 simple cysts, 3 corpus luteum cyst, and 5 endometriotic cyst), 10 serous cystadenomas with 13 lesions, 8 mucinous cystadenomas, 9 teratomas with 10 lesions, and 10 struma ovarii.The CT and MRI characteristics of the lesions in size, shape,thickness of cyst wall,wall nodule,density or signal intensity,and enhancement features were helpful in differential diagnosis of BOCL.Conclusion CT and MRI findings of BOCL have certain characteristics, which is significant in the diagnosis, preoperative evaluation and prognosis.

Objective To study the CT findings of ovarian sertoli-leydig cell tumor (SLCT),to improve the understanding of SLCT imaging features.Methods CT images of 6 cases were reviewed retrospectively.CT plain scan was performed in 6 patients;CT enhancement scan was performed in 4 patients.Results All tumors were unilateral.On non-enhanced CT,5 cases showed cystic-solid masses with clear margin,and 1 case showed solid mass.After contrast administration,the cystic walls,septum and solid portions showed progressively obvious enhancement.Of these 6 cases, 3 cases showed increased testosterone levels,2 cases had high prolactin level,and 1 case was with raised AFP in plasma.Positive expressions of immunohistochemical markers were as following:Inhibin-α (6 cases),Vimentin (4 cases),Calretinin (2 cases), CD99 (1 case), Ki-67 (1 case), CK20 (1 case).Conclusion CT findings of SLCT have some certain characteristics, especially a unilateral, cystic-solid and well-defined mass, and marked solid part enhancement on contrast CT.Combined with clinical findings, especially increased plasma testosterone levels, SLCT should be included in the differential diagnosis of regional tumors.

Objective To study the CT and MRI features of malignant adrenal tumors(MAT)for improving the understanding of the disease and imaging diagnosis.Methods CT and MRI findings were retrospectively reviewed in 1 7 patients with MAT proved by surgical pathology.CT scan was performed in 1 7 cases,and CT enhancement scan was performed in 14 cases;MRI scan was comple-ted in 3 cases,and MRI enhancement scan was performed in 2 cases;CT and MRI scans were examinated in 3 cases.Results Among 1 7 patients with MAT,there were 3 adrenocortical carcinomas,2 neuroblastomas,1 malignant pheochromocytoma,1 lymphoma,1 leiomyosarcoma,and 9 adrenal metastatic tumors.The CT and MRI characteristics in size,shape,boundary,density or signal,and en-hancement features,can discriminate MAT.Conclusion CT and MRI findings of some MAT have a certain characteristic;The ima-ging findings combined with clinical data are helpful in correctly making preoperative diagnosis.

OBJECTIVETo explore the anti-tumor immunity in vitro induced by prostate cancer cell vaccine transfected with recombinant adenovirus encoding 4-1BBL in mice.

METHODSThe replication-deficient adenovirus AdEasy-1 system was used to construct recombinant adenovirus Ad-m4-1BBL and Ad-eGFP. The prostate cancer cell RM-1 of mice was transfected with Ad-m4-1BBL and Ad-eGFP, and treated with mitomycin (MMC) to produce TCV, TCV-Ad-eGFP and TCV-Ad-m4-1BBL, followed by co-culture with syngeneic murine spleen cells. Then the cytotoxic activity of the lymphocytes against RM-1 cells was analyzed with CCK-8 solution, and IL-2 and INF-gamma were detected by ELISA.

RESULTSThe 4-1BBL protein was highly expressed in the TCV-Ad-m4-1BBL of the 4-1BBL-transfected mice. TCV-Ad-m4-1BBL significantly increased the expressions of IL-2 ([180.24 +/- 2.22] pg/ml) and INF-gamma ([1512.46 +/- 23.64] pg/ml) as compared with TCV and TCV-Ad-eGFP (P < 0.05), and induced higher RM-1 cell specific cytotoxicity ([34.24 +/- 2.64]%) than the latter two ([9.82 +/- 1.48]%) and ([14.65 +/- 3. 21]%), (P < 0.05). But none of them exhibited significant cytotoxicity against hepatocellular carcinoma Hepal-6.

CONCLUSIONThe m4-1BBL-expressing prostate cancer cell vaccine can effectively induce anti-tumor immune responses.

4-1BB Ligand ; genetics ; immunology ; Animals ; Cancer Vaccines ; genetics ; immunology ; Cell Line, Tumor ; Coculture Techniques ; Cytotoxicity, Immunologic ; genetics ; Female ; Interleukin-2 ; metabolism ; Male ; Mice ; Mice, Inbred C57BL ; Prostatic Neoplasms ; Transfection

Objective To explore the prognostic value of Acute Kidney Injury Network (AKIN)criteria combined with Acute Physiology and Chronic Health Evaluation Ⅱ (APACHE Ⅱ)and Sequential Organ Failure Assessment(SOFA)scoring system in acute kidney injury(AKI)after cardiac surgery. Methods Clinical data of patients who underwent open-heart surgery in Zhongshan Hospital,Fudan University from April 2009 to August 2009 were prospectively collected.AKI after cardiac surgery was classified by AKIN staging system.APACHE Ⅱ and SOFA scores were evaluated according to the worst value of physiologic variables in the 1st 24 h after surgery.Discrimination and calibration of these three models were assessed by receiver operating characteristic(ROC) curve and Hosmer-Lemeshow goodness-of-fit test.Besides,their effects on inhospital mortality were evaluated by multivariate Logistic regression analysis. Results Of the 993 admissions,309 patients developed AKI and the incidence was 31.1%.The median time that developed postoperative AKI and reached the Scr peak were 1 d and 2 d respectively.Either APACHE Ⅱ or SOFA scores,which was positively correlted with the severity of AKI(APACHEⅡr=0.37,P<0.01;SOFA r=0.42,P<0.01)was higher in AKI patients compared with that in nonAKI patients(P<0.01).The mortality rose corresponding to the severity of kidney injury.However,the predicted death rate-adjusted(PDR-A)calculated by APACHE Ⅱ scoreS Was higher than the actual value in non-AKI patients and AKIN stage 1(P<0.01),while it was lower in AKIN stage 3 (P<0.01).The areas under the ROC curve of APACHEⅡ,SOFA and AKIN criteria were all above 0.8 and the results of Hosmer-Lemeshow goodness-of-fit test indicated good calibration of three models.Multivariate analysis showed that APACHE Ⅱ≥19(OR=4.26)and AKIN stage 3(OR=76.151 were independent predictors of in-hospital mortality. Conclusions AKI can be classified by AKIN criteria in the early stage after cardiac surgery and the AKIN staging system may serve the prediction of prognosis.The APACHE Ⅱ and SOFA scores just evaluated in the 1st 24 h after operation can discern the severity of patients'illness.Three models all present good discrimination and calibration in predicting patients'outcome.APACHE Ⅱ≥19 along with AKIN stage 3 are found to be the independent predictors of in-hospital mortality.It should be noticed that the deviation between PDR-A and the actual mortality in subgroups,dynamic evaluation may raise the accuracy of scoring system.

Objective To observe the effects of 75 gram glucose oral tolerance test (75 g OGTT) and standard mixed meal test (SMMT) on insulin secretion function of the islets of Langerhans and plasma free fatty acid (FFA) in patients with type 2 diabetes mellitus.Methods Seventy-six patients with type 2 diabetes without using insulin and with no obvious complications were recruited for 75 g OGTT following overnight fasting on the first day and SMMT (bread 50 g,egg 50 g and milk 250 ml) on the 7th day.Blood specimens were collected from each patients before the tests and 30 min,60 min,120 min and 180 min after glucose or meal load to measure their levels of plasma glucose,serum insulin,C peptide,FFA and lipids (total cholesterol,triglyceride,high-density and low-density lipoprotein cholesterol).Results No difference in fasting plasma glucose,serum insulin,C peptide,FFA and lipids between 75 g OGTT and SMMT was found.Postprandial plasma glucose 30 min,60 min,120 min and 180 min after 75 g OGTT was significantly higher than that after SMMT,with (15.3?3.5) vs (9.9?3.4) mmol/L,(18.2?4.8) vs (12.8?4.0) mmol/L,(16.3?5.8) vs (12.2?4.9) mmol/L and (10.6?5.4) vs (9.5?4.5) mmol/L (F=28.1,P