Objective　To study the effects of ACE1 on amount and mRNA expression of Ca2+ release channels(RyR2) of myocardial sarcoplasmic reticulum(SR) in prevention and treatment of chronic heart failure.Methods　After the model of chronic heart failure was established with ligation of left corongary artery in rats,the animals were prevented and treated with Perindopril. Hemodynamic parameters, Bmax and Kd of ［3H］－ryanodine binding to RyR2、RyR2 mRNA content were determined.Results　Compared with the control group(group C),LVEDP in the heart faliure group (group F)increased(P<0.01),while+dp/dtmax and -dp/dtmaxdecreased significantly(P<0.01).LVEDP was lower but +dp/dtmax and -dp/dtmaxsignificantly higher in the Perindopril treated group(group P)than those in group F(P<0.01).Bmaxof ［3H］－ryanodine binding to RyR2 and mRNA content of RyR2 in group F were lower than those in group C(P<0.01),and these in group P were higher than those in group F(P<0.01). There were no significant difference of Kd among the three groups(P>0.05).Conclusion　The amount and mRNA expression of RyR2 of myocardial sarcoplasmic reticulum(SR) decreased in chronic heart failure.Perindopril can improve mRNA expression and amount of RyR2 of myocardial SR in prevention and treatment of chronic heart failure, thus contributing to the improvement of myocardial function.

Objective To investigate the clinical, pathological and endoscopic features of patients with ulcerative pancolitis (PUC) and distal colitis (DUC) and their differentiations. Methods The clinical, pathological and endoscopic data of 52 patients with PUC and 97 patients with DUC were analyzed by case-control study. Results The incidence and the frequency of bloody stool in patients with PUC were both higher than those in DUC (90.38% vs. 71.13%, P

Objective To discuss the clinical value of simultaneous morcellation in situ in laparoscopic myomectomy (LM). Methods One hundred and eighty-nine women who underwent LM for symptomatic myomas were randomly divided into in situ group(94 cases) and standard group(95 cases). The operation time, hemorrhage perioperative,exhaust time postoperative, length of hospital stay were compared.Results The operation was successful in two groups. The operation time and hemorrhage perioperative in situ group were significantly less than those in standard group [ (98.20 ± 40.70) min vs. ( 129.20 ± 68.50)min (P＜0.05) and (113.40± 38.30) ml vs. (168.90±61.70) ml (P＜0.01)]. There was no statistical difference in exhaust time postoperative, length of hospital stay between two groups (P ＞0.05). One case occurred eechymoma in two groups respectively. Conclusion The application of simultaneous morcellation in situ in LM is safe and feasible.

Objective To explore the sensitivity of a little amount of subarachnoid hemorrhage (SAH) between CT and different MR sequences through animal experiment,to find a more sensitive way to diagnosis SAH.Methods 18 healthy adult white New Zealand rabbits were randomly divided into two experimental groups(group A and group B) and one control group(group C).Rabbit SAH model was established by injecting blood into the cisterna magna one time.All rabbits underwent CT and MR scan at 2 hours,48 hours after operation.The findings on CT and different MR sequences were observed and recorded.Results ①In experimental groups(group A and group B),MR FLAIR sequences in the diagnosis of a little amount of SAH was more sensitive than that on MR T1WI,T2WI and CT in acute phase.And the diagnosis sensitivity between MR FLAIR and CT was statistically significant(P<0.05).②Abnormal signs of SAH could not be found in group C.Conclusion ①Rabbit SAH model was established successfully which will be the foundation for the follow-up study of medical imaging.②MR FLAIR sequence is more sensitive to diagnose a little amount of SAH in acute phase,and may be used in the routine diagnosis of SAH in acute phase.

AIM: To observe the effects of aspirin and prostaglandin E_2 (PGE_2) on the cell viability and cell cycle in SW1990 human pancreatic carcinoma cell lines, and to investigate the mechanisms of aspirin-induced growth inhibition and cell cycle arrest. METHODS: After incubated with aspirin or PGE_2 and their combination, the viability of SW1990 cells was measured by MTT assay. The levels of intracellular PGE_2 were determined by ELISA. The effects of aspirin or PGE_2 on cell cycle were investigated by flow cytometry (FCM). The expression of p21~ Wafl/cipl and p27~ Kipl/pic2 (the cyclin-dependent kinase inhibitors) were analyzed by Western blotting. RESULTS: Aspirin could inhibit the growth of cells and level of intracellular PGE_2 in a dose-dependent manner. Aspirin enhanced the expression of p21~ Wafl/cipl and p27~ Kipl/pic2 and induced cell cycle arrest at G_0/G_1 phase. PGE_2 increased the cell viability of SW1990 cells. However, it couldn't antagonize the changes of cell viability and cell cycle that induced by aspirin. CONCLUSIONS: The inhibitory effects of aspirin on growth and cell cycle of pancreatic carcinoma cells might not be mediated by a COX-dependent pathway completely. Cell cycle arrest induced by aspirin might be associated with up-regulation of p21~ Wafl/cipl and p27~ Kipl/pic2 .

Objective To study the clinical value of cerebrospinal fluid cytology(csfc)and specific stain in tuberculous meningitis(TBM)-purulent meningitis(PM)and cryptococcal meningitis(CM).Methods The csfc data of 179 patients with TBM,PM and CM were retrospectively analyzed.The samples collected from all of these patients were analyzed by csfc May-Grunwald-Giemsa(MGG)staining,aricine blue staining and Indian ink staining. And the cytospin smears from 70 TBM were simultaneously stained by the immunofluorescence(IF)and immunocytological method to demonstrate the presence of mycobacterial antigen.Results ①TBM group showed a mixed-cell response.At the early stage of disease,the proportion of neutrophilic granulocyte reached 80%,and then reduced gradually.Lyumphoidocyte reaction was the most obvious in 1～2 months.The immunofluorescence(IF)and immunocytological method present a sensitivity of 82.9%and 85.7%,respectively.②Neutrophilic granulocyte was the most cell at acute stage of PM,and it descended quickly once treated with effective antibiotics.③The positive rates to detect CM with csfc MGG,aricine and Indian ink staining were 83.3%,81.8%,and 76.5%,respectively.Conclusion Dynamic observation on cerebrospinal fluid cytology is helpful to boost the differential diagnosis of intracranial infection.

Data quality management system is essential to ensure accurate, complete, consistent, and reliable data collection in clinical research. This paper is devoted to various choices of data quality metrics. They are categorized by study status, e.g. study start up, conduct, and close-out. In each category, metrics for different purposes are listed according to ALCOA+ principles such us completeness, accuracy, timeliness, traceability, etc. Some general quality metrics frequently used are also introduced. This paper contains detail information as much as possible to each metric by providing definition, purpose, evaluation, referenced benchmark, and recommended targets in favor of real practice. It is important that sponsors and data management service providers establish a robust integrated clinical trial data quality management system to ensure sustainable high quality of clinical trial deliverables. It will also support enterprise level of data evaluation and bench marking the quality of data across projects, sponsors, data management service providers by using objective metrics from the real clinical trials. We hope this will be a significant input to accelerate the improvement of clinical trial data quality in the industry.

Objective To investigate the advantages, indications, operative techniques and pre-liminary curative effect of proximal femoral nail antirotation(PFNA) in surgical treatment of intertrochan-teric fractures. Methods From March 2006 to June 2007, PFNA fixation was done on 38 patients with intertrochanteric fractures including 17 males and 21 females, at an average age of 65. 4 years(35-93 years). According to AO/ASIF classification, there were 10 patients with type 31-A1 fractures, 21 with type 31-A2 and 7 with type 31-A3. All patients were reduced through longitudinal traction on the traction table, with implantation of PFNA via a mini-incision. Results The mean operation duration was 50 minutes(35-105 minutes)and mean blood loss 100 ml(50-300 ml). All patients were successful except for 1 patient with split lateral cortical bone of distal shaft of the femur during operation. All pa-fients were followed up for average 13 months(4-19 months), which showed long-team bed stay due to severe complieations in 1 patient. Function recovery in 32 and deterioration of the injured limbs in 5. Cer-ebral infarction was found 6 months after operation in 1 patient, who was able to walk under support. Pri-mary bone union was achieved in all patients, with average healing time of 9. 5 weeks. There were no complications such as infection of incisional wound, pulmonary infection, phlebothrombosis, over incision or coxa adducta, except that 2 patients had perioperative respiratory system disease. According to Harris hip rating scale system. The result was excellent in 20 patients, good in 13, common in 4 and poor in 1, with total excellence rate of 89%. Conclusions As a new technique, PFNA has advantages of litth trauma. Early get-out-of-bed exercise, few complications, rigid fixation and high bone union rate and is suitable for all kinds of intertrochanteric fractures especially for old patients with osteoporosis.

Objective To investigate the killing effect of hematoporphyrin derivative photedynamic therapy (PDT) on cultured human pancreatic cancer cell,and to explore the mechanism of this effect.Methods Biolitec PDT 630 semi-conductor laser therapeutic apparatus was used as the light source.After pancreatic cancer cell PANC1 was incubated 8 h with different concentrations of Photosan(hematoporphyrin derivative) as photosensitizer (0.5mg/L,1 mg/L,2 mg/L,4 mg/L),the cells were given different doses of 630nm laser irradiation(1 J/cm2' 5 J/cm~2,10 J/cm~2 ).The A492 value was determined in each group with MTT method.Cell apoptosis rate was detected by flow cytometry after PDT.Results There was no killing effect when no Photosan was administrated;10 J/cm~2 irradiation had killing effect on PANC1 when Photosan was administrated as 1 mg/L(0.140±0.013 vs 0.213±0.008,P＜0.05);5 and 10 J/cm~2 irradiation all had killing effect on PANC1 when Photosan was administrated as 2 mg/L (0.081±0.024 and 0.049±0.013vs 0.211±0.031,P＜0.05 and P＜0.01 );all doses of irradiation had killing effect when Photosan was administrated as 4 mg/L.There was no significant difference between 5 and 10 J/cm~2 irradiation in term of killing effect.Cell apoptosis rates with 0 or 2 or 4 mg/L Photosan and 10 J/cm~2 irradiation were(13.8±1.8) %,(40.9±1.6)%,(62.5±2.0)%,the difference was statistically significant(P＜0.05).Conclusions Photosensitizer or irradiation alone did not produce PDT effect.With certain dose of photosensitizer and irradiation,the PDT effect increased accordingly.

Objective To study the severity of acute pancreatitis (AP) by using MRI and the acute physiology and chronic healthy evaluation Ⅲ (APACHE Ⅲ ) score, and the correlation between corresponding MRI findings and APACHE Ⅲ scores.Methods One hundred patients with AP undergoing abdominal MRI were recruited in the study. The MRI features of acute pancreatitis were recorded. The severity of AP on MRI was graded by MR severity index (MRSI) as mild (0 to 2 points),moderate ( 3 to 6 points) and severe (7 to 10 points).APACHE Ⅲ score was denoted for AP was as mild ( ＜35 points)and severe ( ≥ 35 points).The local and systematic complications,mortality,need to intense care unit (ICU),and hospitalization time were recorded and compared with MRSI and APACHE Ⅲ score.Nonparametric Spearman correlation was calculated for testing the correlation between the MRSI,the APACHE Ⅲ and hospitalization time.The correlation of clinical results with MRSI and APACHE Ⅲ was calculated by x2 test.Results In the 100 patients with AP,there were respectively 80 and 20 patients with edematous and necrotic pancreatitis on MRI.According to MRSI,34,59 and 7 patients had mild,moderate,and severe acute pancreatitis,respectively.The APACHE Ⅲ score was (24.9 ± 12.2) points.Seventy-seven patients had less than 35 points and 23 patients had more than 35 point of APACHE Ⅲ score.There were significant differences in the local complication,systematic complication,need to ICU among the three groups in MRSI score,respectively( x2 =9.161,19.118,54.767;P ＜ 0.01 ).There was difference in the systematic complication between mild and severe AP in APACHE Ⅲ score(x2 =13.120,P =0.000),but there were no differences (x2 =0.245,x2 =2.568;P ＞ 0.05) in the local complication,need to ICU between mild and severe AP in APACHE Ⅲ score.There was weak correlation ( r =0.235,P =0.019 )between MRSI score and hospitalization time,and no difference (r =0.168,0.105; P ＞ 0.05)between APACHE Ⅲ and MRSI,APACHE Ⅲ and hospitalization time,respectively.Conclusions Both MRSI and APACHE Ⅲ score may predict systematic complications. However,MRSI is superior to APACHE Ⅲ in predicting the local complications,need to ICU,and hospitalization time in patients with acute pancreatitis.