Objective To study the protective effect and Bcl-2 expression of salvia miltiorrhiza pretreatment on retinal ischemia-reperfu-sion injury ( RIRI) . Methods One hundred and thirty two Wistar rats were randomly divided into the normal control group, the ischemia-reperfusion group and the salvia miltiorrhiza pretreatment group. The model of retinal ischemia-reperfusion injury was constructed by increas-ing the intraocular pressure. The ischemia-reperfusion and salvia miltiorrhiza pretreatment group were divided into five subgroups according to the different reperfusion time (6 h, 12 h, 24 h, 48 h and 72 h). Observe the histological changes in retina by HE staining. The SABC ( strept avidin-biotin complex) and Western-blot were used to measure changes of Bcl-2 protein levels in retinal. Results The positive ex-pression of Bcl-2 protein was weak in normal group. In the ischemia-reperfusion group and salvia miltiorrhiza pretreatment group, the expres-sion of Bcl-2 protein began to increase at 6 hours after reperfusion, reached the peak at 24 hours after reperfusion, began to decrease at 48 hours after reperfusion, and started to weaken at 72 hours after reperfusion. The variation tendency of the two groups were the same, however, the expression of Bcl-2 was significantly stronger in the salvia miltiorrhiza pretreatment group compared with ischemia-reperfusion group, and there was significant difference between the two groups (P<0. 01). Conclusion Salvia miltiorrhiza pretreatment can protect the retina by reducing retinal ganglion cells apoptosis in retinal ischemia-reperfusion injury. The mechanism may be achieved by regulating the expression of Bcl-2 protein.

Objective To determine the relation between the expression of urocortin and corticotropin-releasing hormone receptor 2? (CRH-R2?) in the placenta and pathogenesis of preeclampsia. Methods Placentas were collected from 20 pregnant women with preeclampsia as study group and 20 normal pregnant women as control group. Urocortin mRNA and CRH-R2? mRNA were measured by semi-quantitative reverse transcriptase polymerase chain reaction (RT-PCR). Urocortin peptide was measured by immunohistochemistry. Results (1) The mRNA expression of urocortin was significantly higher (P

Objective To explore the intervention effect of emodin on organophosphorus poisoning induced respiratory failure.Methods 60 male Wistar rats of clean grade were randomly divided into:normal control group, model control group, positive drug group and emodin group, with 15 rats in each group.Except the normal control group rats were given intraperitoneal anesthesia, the right common carotid artery intubation, when rats stayed awake began a septic model.Blood gas analysis and serum level of oxygen free radicals and respiratory rate were compared before poisoning, respiratory failure, intervention of 5, 10, 30 min.Results Mouth breathing, slow respiratory frequency and cyanosis, appeared after exposure.Respiratory frequency decreased after exposure , compared with the positive drug group, respiratory frequency of emodin group 10 min and 30 min was higher ( P<0.05), PaO2, SaO2, BE decreased, PaCO2 increased after respiratory failure, Compared with the positive drug group, PaO2, PaCO2, SaO2 and BE of emodin group for the treatment of 10 min, 30 min was higher,(P <0.05).The level of oxygen free radicals in rats of each group had no significant difference before the exposure and the respiratory failure.Compared with the positive drug group, SOD and MDA of emodin group in 30 min after intervention were higher,( P<0.05 ) .Conclusion Emodin can improve the respiratory frequency of organic phosphorus poisoning induced respiratory failure ,improve blood gas analysis of the indicators and the level of oxygen free radicals.

Objective To observe the effect of Juli Sanjie Pill(JSP) on estrogen receptor(ER)? and ER? expression in the myometrium and hysteromyoma tissue,and to explore the correlation of ER? and ER? expression levels with the incidence of hysteromyoma. Methods Forty hysteromyoma patients were divided into two groups: 20 patients with operative indications after oral use of JSP and asking for operation,were enrolled in the treatment group,and other 20 patiens without mediation of medicine but asking for operation were in the control group.The ER? and ER? expression levels in hysteromyoma tissue and the surrounding normal myometrium of the two groups were detected by radioimmunoassay.Results There presented the expression of ER? and ER? in the hysteromyoma tissue and the surrounding normal myometrium of the two groups,and the levels in the hysteromyoma tissue were higher than that in the myometrium(P0.05).Conclusion The incidence of hysteromyoma is correlated with the local expression of ER? and ER? in the uterus.The therapeutic mechanism of JSP for hysteromyoma is probably related with the decrease of ER? and ER? expression levels in hysteromyoma tissue and with the decrease of ER? level in the surrounding normal myometrium.

0.05).② On diagnosing ACS,the area under ROC curve of sCD40L was 0.773,the sensitivity,specificity and validity are 82.8%,61.9% and 85.7%,respectively,which were all highest among so much indexes.Conclusion High serum sCD40L levels may suggest vulnerable plaque,and it's somewhat valuable in diagnosing ACS.

Objective To examine the expression of urocortin mRNA during labor and the effect of uroco rtin on myometrial contractility, and to investigate its role in the onset and p rogress of labor. Methods (1) Semi-quantitative reverse transcription-polymerase chain reaction (RT -PCR),using ?-actin as internal standard was applied to determine the levels of urocortin mRNA in human placenta and myometrium from the group of cesarean se ction before (10 cases) and during (10 cases in latent phase and 10 cases in act ive phase) labor.(2) The isolated myometrial strips of pregnant women (n=24 ) were prepared.The effects of urocortin with or without prostaglandin F 2? (PGF 2?) and oxytocin on myometrial contractility were evaluated by area s under the curve. Results (1) Semi-quantitative RT-PCR showed that the expression level of urocortin mRN A in placenta and myometrium after the onset of labor were higher than before la bor (1.23 ?0.52, 1.32?0.22; 0.83?0.38, 0.94?0.13, respectively, P0.05). Conclusion The study indicates urocortin may indirectly m odulate myometrial contractility during labor.

The evaluation of pancreatic function includes the evaluation of endocrine function and exocrine function.Insufficiency of pancreatic endocrine function can lead to pancreatic related diabetes.The pancreatic endocrine function is often evaluated by fasting blood glucose, two hours postprandial blood glucose, and glycosylated hemoglobin.Pancreatic exocrine dysfunction can lead to abdominal pain, abdominal distension, fatty diarrhea, malnutrition, weight loss and other manifestations.Pancreatic exocrine dysfunction is often atypical, and it is difficult to accurately evaluate pancreatic exocrine function, so the evaluation of pancreatic exocrine function is particularly important.There are indirect and direct methods to evaluate pancreatic exocrine function.At present, the most commonly used direct detection method is the detection of pancreatic function under intravenous anesthesia endoscope.Fecal elastase-1 is a commonly used indirect detection method at present.

Scatter coincident events are the important factor that affects the quality of positron emission tomography (PET) images. In this paper, according to the characters of projection data, a scatter correction method which uses maximum likelihood expectation maximization (MLEM) algorithm based on poisson model is proposed. We compared the sinograms and reconstructed images corrected by MLEM algorithm and deconvolution method respectively. The results indicate that the algorithm proposed in this paper increases the contrast of images while correcting scatter. It is better than the traditional method.
Algorithms ; Image Processing, Computer-Assisted ; methods ; Nonlinear Dynamics ; Poisson Distribution ; Positron-Emission Tomography ; methods ; Scattering, Radiation

Objective To study the clinical role of the variation of serum matrix metalloproteinase-8 (MMP-8)concentration in patients with acute coronary syndrome (ACS). Methods ELISA method was adopted to detect serum MMP-8 concentration and to observe concentration's differences and features among 80 selected ACS cases (43 acute myocardial infarction and 37 unstable angina pectoris), 43 stable angina pectoris (SAP) cases and 37 control cases.And meanwhile the atherosclerosis risk factors of each case, such as age, sex, hypertension, body mass index, smoking,family history, diabetes, and hyperlipidemia were collected and analyzed as a whole. Results First, serum MMP-8 concentration reached the highest point in ACS, and there was significant difference between SAP and control groups (P<0.01). Second, sermn MMP-8 in AMI was much higher than that in UAP with significant difference (P<0.01). There was no difference between UAP and SAP groups (P>0.05). Third, Logistic regression analysis revealed that serum MMP-8 concentration might be the indicator of ACS (B=4.493, P=0.000), particularly, that of AMI (B=9.961,P=0.000). Fourth, linear correlation and linear regression analysis found that only neutrophil was likely to influence serum MMP-8 concentration (r=0.274, P=0.001). Fifth, in the diagnosis of ACS, the area under ROC curve of MMP-8 was 0.785, the sensitivity and specificity were 68.6% and 76.5%, respectively. Conclusion ① Serum MMP-8 concentration has close relationship with the occurrence of ACS, particularly with AMI;② Serum MMP-8 concentration may be one of the predicting indicators of ACS and particularly of AMI;③ Neutrophil may be correlated with serum MMP-8 concentration;④ MMP-8 is of somewhat valuable in diagnosing ACS.

Objective: To explore and compare the preventive effect of using letrozole and gonadotropin-releasing hormone (GnRH) antagonist during luteal phase of patients at high risk for ovarian hyperstimulation syndrome (OHSS). Methods: A total of 99 infertile women undergoing in vitro fertilization and embryo transfer or intracytoplasmic sperm injection with high risk for OHSS were enrolled in this randomized controlled trial.The letrozole group (n=51) received letrozole of 7.5 mg daily for 3 days;the GnRH antagonist group (n=48) were given cetrorelix of 0.25 mg subcutaneously daily for 3 days. Both groups received support therapy combined with embryo cryopreservation. The incidence of OHSS was surveyed. And the serum concentration of estradiol, LH and progesterone on days 3, 5 and 8 after oocytes retrieval were measured. Results: There were no statistical differences in terms of baseline characteristics of patients and outcomes of controlled ovarian hyperstimulation between the two groups.The incidence of moderate and severe OHSS was found no significantly difference between letrozole group [11.8%(6/51)] and GnRH antagonist group [10.4%(5/48);P>0.05]. The estradiol concentration of the indicated days on days 3,5 and 8 after oocytes retrieval in letrozole group and GnRH antagonist group were (1 417±3 543) versus (15 210±9 921) pmol/L, (1 692±4 330) versus (18 680±11 567) pmol/L, (239±336) versus (3 582±5 427) pmol/L, respectively;compared with GnRH antagonist group, the estradiol level was significantly lower in the letrozole group (all P<0.01). The luteinizing hormone level in the letrozole group were (0.46±0.40), (0.56±0.55)and (0.67±0.58) U/L on days 3,5 and 8 after oocytes retrieval, which were significantly higher than those of GnRH antagonist group [(0.28±0.28), (0.30±0.19) and (0.45±0.37) U/L, respectively; all P<0.05]. There was no obvious differences on progesterone levels between letrozole group and GnRH antagonist group (all P>0.05),and on days 8 after oocytes retrieval,the level of progesterone in each group were significantly lower than those on day 3 and 5 after oocytes retrieval (P<0.05). Conclusion Letrozole has the same efficiency as GnRH antagonist for the prevention of OHSS, faster and cheaper to use, but its efficacy seems not to be related to the suppression of steroidogenic during the luteal phase.