BACKGROUND: Panax notoginseng is an effective medicine for curing gastric mucosal ulcer. There are many clinical reports that Panax notoginseng protects gastric mucosa.OBJECTIVE: To investigate the protective mechanism of Panax notoginseng on the gastric mucosal injury induced by water immersion restraint stress in rats.DESIGN: A randomized controlled animal trial.SETTING: School of Basic Medical Sciences, Daqing Branch of Harbin Medical University.MATERIALS: The study was conducted in the laboratory of Department of Pathophysiology of Harbin Medical University from September 2004 to October 2005. Forty-eight Wistar rats were used, either male or female, weighing 180-230 g.METHODS: The 48 Wistar rats were randomly divided into six groups with 8 rats in each group: normal control group, stress model group, cimetidine treatment group, Panax notoginseng of low, middle and high-dose groups (4, 8, 12 mg/time). In the cimetidine treatment group, cimetidine tablets were grinded into powders, then mixed with distilled water to prepare into suspension (1 tablet:10 mL), which was perfused intragastrically (5 mL), 3 times a day; In the Panax notoginseng groups, the powders in Panax notoginseng capsules were mixed with distilled water to prepare into suspension of corresponding concentrations (0.8, 1.6, 2.4 g/L), then administrated the same as those in the cimetidine treatment group. Stress models in rats were established by means of water immersion restraint stress. The gross and pathohistological changes of gastric mucosa were observed, and the activity of superoxide oxidase (SOD) and contents of malondialdehyde (MDA) and nitric oxide (NO) were determined.MAIN OUTCOME MEASURES:①Gross and pathohistological changes of gastric mucosa;②Changes of MDA and NO contents and SOD activity in the homogenate of gastric mucosa.RESULTS: All the 48 rats were involved in the analysis of results. The gastric mucosal hemorrhage and erosion in the cimetidine treatment group were reduced obviously as compared with those in the stress model group, SOD activity was obviously decreased [(12.61±0.87), (1.03±0.60) mkat/g], whereas the NO content was a little higher [(5.76±1.35), (0.97±0.58) nmol/g]. The MDA content was obviously higher in the stress model group than in the normal control group [(3.10±1.13), (0.09±0.02) μmol/g, P＜0.01]. There were no obvious differences between the Panax notoginseng groups and the cimetidine treatment group except that the NO contents were decreased in the in Panax notoginseng groups.CONCLUSION: Gastric mucosal injury induced by water immersion restraint stress can be significantly protected by Panax notoginseng, which is not dose-dependent. The protective mechanism may be associated with that Panax notoginseng can eliminate the product of oxygen-derived free radicals, and it is not totally the same as that of cimetidine

Objective To observe the inhibitory effects and characteristics of intravitreal injection with bevacizumab on laser-induced choroidal neovascularization (CNV).Methods Twelve male brown norway (BN) rats were divided into the bevacizumab group and control group with six rats in each group.One eye of rats were received a series of 8 diode laser esions around optic disc to induce CNV,then the rats in bevacizumab group and control group underwent intravitreal injection with 2 μl bevacizumab and ringer's lactate.On days 7,14,and 21,the morphology and leakage of CNV were observed by fundus fluorescein angiography (FFA) and indocyanine green angiography (ICGA).On day 21 after photocoagulation,thephotocoagulated eyes were enucleated and processed for histopathologie examination,including hematoxylin and eosin (H&E) staining and immunohistochemistry staining for vascular endothelial growth factor (VEGF).Results On day 7 after photocoagulation,ICGA showed that CNV developed in the bevacizumab group and the control group.FFA showed that leakage intensity in the bevacizumab group was significantly lower than that in the control group,but the bevacizumab group gradually increased over time.The mean thickness of CNV significantly decreased in the bevacizumab group.The CNV in the bevacizumab group were negative for VEGF according to the result of immmuohistochemistry staining.Conclusions Early intravitreal injection with 2 μl bevacizumab can reduce the thickness of CNV and inhibit the leakage of CNV.However,bevacizumab could neither block the formation of CNV,nor suppress the permeability permanently.Combined other therapies with bevacizumab may be more potential to treat CNV effectively.

OBJECTIVE:To study the effects of indometacin on apootosis and proliferation of cervical cancer Hela cell. METH-ODS:Hela cell was cultured in vitro as study object,and cultured with 0(blank control),200,400,600,800 and 1 000 μmol/L indometacin for 24,48 and 72 h. The inhibitory rate of indometacin to the proliferation of Hela cells was detected by MTT assay. After treated with 0(blank control),400,600 and 800 μmol/L indometacin for 24 h,the change of cellular morphology was ob-served by invert microscope;cell cycle phase and apoptosis were analyzed by flow cytometry. RESUITS:Indometacin of 600, 800,1 000μmol/L could inhibit the proliferation of Hela cell,which was positively correlated to drug concentration and time. Com-pared with blank control,indometacin could induce that Hela cell transformed from polygonous to round in appearance,and result-ed in cell apoptosis and necrosis;the proportion of cells at G0/G1 phase increased,while the proportion of cells at S phase reduced;the apoptotic rate of cells raised. CONCLUSIONS:Indometacin could inhibit the proliferation of Hela cell,block cell cycle at G0/G1 phase and induce apoptosis.

Objective: To quantitatively study the incidental extra-cardiac ifndings (ECFs) by coronary computed tomography angiography (CCTA) in patients with suspected coronary artery disease (CAD) in order to better recognize those lesions in clinical practice.
Methods: A total of 1169 suspected CAD patients received CCTA in our hospital from 2011-06 to 2013-03 and 1030 patients were enrolled in this study. There were 589 in-patients, 441 out-patients and 549 patients≥60 years of age,481 patients < 60 years of age. 3 physicians evaluated the incidental ECFs in the full ifeld of view (FOV) in different window level and window width for lung, mediastinum, thorax and upper abdominal areas. Clinical relevance of ECFs were classiifed by corresponding scores. Score 1, the patients with severe lesion need immediate treatment, score 2, the lesion with clinical and prognostic signiifcance and score 3, the ifnding without clinical signiifcance.
Results: There were 197/1030 (19.1%) patients having 224 ECFs and 27 (2.6%) patients having 2 ECFs; 90/1030 (8.7%) patients having 106 signiifcant lesions including 3 (0.3%) of lung cancer and 8 (0.8%) of pulmonary embolism; 107 patients with 118 lesions without signiifcance. ECFs were found in 114/589 (19.4%) in-patients and in 83/441 (18.8%) out-patients, P>0.05; 76/481 (15.8%) of patients < 60 years of age and 121/549 (22.0%) of patients≥60 years,P<0.05.
Conclusion: Unexpected ECFs detection rate was 19.1% in patients undergoing CCTA without further radiation exposure by reconstruction with the full FOV setting, and 8.7% of ECFs had clinical signiifcance. Radiologists should routinely analyze the extra-cardiac organs in CCTA.

Cartilage antuumor component (CATC) was isolated from a 1 mol/L guanidine hydrochloride extract of bovine cartilage by acetone fractioned precipitation and superfiltration. Using human skin fibroblasts as a normal control, it was demonstrated that CATC inhibited the DNA synthesis of Hela, QGY7703 tumor cell lines and bovine artery endothelial cells, but accelerated the normal cells, when the concentration was below 1250 ?g/ml. At the concentration of 5 000 ?g/ml, CATC inhibited the two cell lines. With human tumor stem cell assay, CATC inhibited the stem cell growth of Hela and QGY7703 cell lines. These suggest that CATC has the effects of inhibiting angiogenesis and tumor cells.

Objective To examine the application value of reticulocyte hemoglobin content (CHr)for diagnosing iron deficiency in premenopausal women.Methods The levels of CHr,hemoglobin (Hb), mean cellular volume(MCV),red cell distribution width (RDW) were measured on the ADVIA 120 (Bayer Diagnostics) automated hematology analyzer.Transferrin saturation (TS) and ferritin (SF) were measured on chemistry analyzer.Results CHr in iron deficiency without anemia group were significantly lower than that in the healthy control group (P＜0.01)and significantly higher than that in iron deficiency anemia group(P＜0.01).CHr in anemia of chronic disease group were significantly higher than that in iron deficiency anemia group(P＜0.01).Receiver operator characteristic curve (ROC) analysis in diagnosis of iron dificiency without anemia demonstrated that the area under the curve for CHr,SF,RDW,MCV,Hb were 0.872,0.798,0.721,0.713,0.677,respectively (P＜0.01).So CHr has a better overall sensitivity than SF,Hb,MCV and RDW in the diagnosis of iron deficiency without anemia.ROC also showed that the area under the curve for Hb,RDW,CHr,SF and MCV was 1.000,0.969,0.958,0.953 and 0.926,respectively (P＜0.01) in iron deficiency anemia.Conclusion CHr is the early and sensitive predictor of iron deficiency in premenopausal women,especially for the diagnosis of iron deficiency without anemia.

Objective To observe the preventive efficacy and safety of dexmedetomidine with parecoxib sodium on the patients with postoperative hyperalgesia induced by remifentanil. Methods A total of 100 female patients undergoing elective surgery under general anesthesia were as-signed into four groups according to the table of random number:the control group (group C),the parecoxib sodium group (group P),the dexmedetomidine group (group D)and the parecoxib sodium combined with the dexmedetomidine group (group DP).The vital signs were monitored and the total intravenous anesthesia was performed.All the patients were give intravenous injection of 0.2μg·kg-1 ·min-1 remifentanil and 4-12 mg·kg-1 ·h-1 propofol to maintain the anesthesia.Patients in group P were given 40 mg parecoxib sodium 30 minutes before the end of the operation.Patients in group D were give intravenous injection of 0.6μg·kg-1 ·min-1 dexmedetomidine consistently till 30 min before the end of the operation.Patients in group DP were given 0.6 μg·kg-1 ·min-1 till 30 min before the end of the operation and were given 40 mg parecoxib sodium.The VAS scores were re-corded at 1,2,6,12,24 hours.The cases of agitation,rigors,nausea and vomiting and increasing of analgesics were recorded.Results The postoperative VAS scores in group P,group D and group DP were significantly lower than group C(P <0.05).The postoperative VAS scores in group DP were significantly lower in group P and group D (P<0.05).Cases of agitation and rigors in group D and group DP were less than group C(P <0.05).The increasing of analgesics in group DP was much higher than other groups(P<0.05).Conclusion After induced,patients were given intravenous in-jection of 0.6 μg·kg-1 ·min-1 dexmedetoniding consistently till 30 min before the end of the opera-tion were given 40 mg parecoxib sodium can effectively prevent hyperalgesia after remifentanil anes-thesia without significant increase in revival time and obtain a better sedation.

Objective To compare the effect and toxicity of domestic idarubicin (IDA) and imported daunorubicin (DNR) in the treatment of acute leukemia (AL).Methods According to the random number table method,68 patients were randomly divided in IDA group with 35 patients and DNR group with 33 patients.In IDA group,the patients with acute myelocytic leukemia were treated following IA scheme (domestic idataubicin plus cytosine arabinoside) and the patients with acute lymphoblastic leukemia were treated following VICLP scheme (vincristine,domestic idataubicin,cyclophosphamide,lasparaginase and prednisone).In DNR group,the patients with acute myelocytic leukemia were treated following DA scheme (imported daunorubicin plus cytosine arabinoside) and the patients with acute lymphoblastic leukemia were treated following VDCLP scheme (vincristine,imported daunorubicin,cyclophosphamide,lasparaginase and prednisone).Results In IDA group,21 patients achieved a complete remission(CR),5 patients achieved a partial remission(PR),with a 74.2 ％ (26/35) remission rate (RR).In DNR group,the remission rate was 62.3 ％ (20/33).No differences of the remission rate was found between the two groups (t =0.89,P =0.50).17 patients were found remission over one year in IDA group,and 6 patients were in DNR group.The difference was statistically significant between the two groups (x2 =5.56,P =0.02).Conclusion IDA is more effective than DNR in AL treatment.The higher RR and longer remission time are found in IDA group than DNR group.IDA is effective and safe in the treatment of AL.

Objective: To assess the renal cortical perfusion parameters by the imaging of computed tomography (CT) in patients of essential hypertension (EH) with target organ damage.
Methods: A total of 90 subjects with the entire information including 59 EH patients were studied. The EH patients were divided into 2 groups: EH + target organ damage group,n=30 and EH without target organ damage group,n=29. In addition, there was a Control group,n=31 healthy volunteers. All subjects received 128-slice dual-source CT renal perfusion scanning, the quantitative perfusion of renal cortex blood lfow (BF), blood volume (BV), time to peak (TTP) and the mean transit time (MTT) were examined and compared among different groups.
Results: There were 90/97 (92.8%) participants eligible for perfusion analysis. Compared to Control group, EH without target organ damage group had the similar parameters of BF, BV, MTT and TTP,P>0.05. While EH + target organ damage group had decreased BF (214.6 ± 36.1) ml/(min?100 ml ) than Control group (262.1 ± 26.6) ml/(min?100 ml ),P<0.01, and BV, TTP, MTT were similar to Control group,P>0.05. Compared to EH without target organ damage group, the EH + target organ damage group presented decreased BF (214.6 ±3 6.1) ml/(min?100 ml ) vs (268.9 ± 33.1) ml/(min?100 ml ), P<0.01 and prolonged MTT, TTP,P< 0.05.
Conclusion: CT imaging may evaluate the renal cortical perfusion changes, and especially BF which can relfect the renal perfusion more sensitively than other parameters in EH + target organ damage patients.

Objective To compare the growth characteristics,proliferation and osteo/odontogenic differentiation capability of stem cells from human dental pulp (dental pulp stem cells,DPSCs) and apical papilla (stem cells from apical papilla,SCAP) in vitro.Methods Human dental pulp and apical papilla tissues were separated from impacted third molars of young healthy donors at the age of root development and digested by collagenase type Ⅰ and dispase type Ⅱ to derive primitive DPSCs and SCAP.Cells were then induced for osteo/odontongenic differentiation by medium containing β-glycerophosphate,dexamethasone and KH2PO4.Flow cytometry was utilized to test the expression of specific markers of stem cells,including CD24,CD34,CD45,CD90,CD105,CD146,STRO-1 and OCT-4.AR-S was used to display the mineralization structure and RT-PCR was applied to analyze the expression of bone sialoprotein (BSP),osteocalcin (OCN) and dentine sialophosphoprotein (DSPP).Results Both DPSCs and SCAP were positive for CD90,CD105,CD146,STRO-1 and OCT-4,in percentages varying according to cell type,without expression of CD34 or CD45.Only SCAP expressed CD24 positively.Both cells formed organized mineralization structure after 2 weeks of induction in time-dependent manner,with more mineralization by SCAP and expressed differentiation markers,including BSP,OCN and DSPP.Conclusion Human DPSCs and SCAP possess the characteristics of MSCs and could be differentiated into odontonblast-like cells in vitro.Both cells are approachable stem cell sources for dental tissue engineering.