Objective To investigate the mechanism of Secretio bufonis injection on the carcinostatic activities in mice bearing intraperitoneal H22 tumor. Methods Secretio bufonis injection (1.5 mL) was injected into the abdomind cavity of mice once 5 d for 3 times. Cyclophosphamide (0.5 mg/0.5 mL) was injected into other groups. NS (0.5 mL) was injected into control groups. Each group were 20 mice. TNF and survival time of mice were observed. Results Mean survival times of mice bearing intraperitoneal H22 tumor were (28.2?5.8)d for Secretio bufonis group,(27.9?9.7)d for Cyclophosphamide group,(20.7?4.2)d for control group. The content of TNF in mice bearing intraperitoneal H22 tumor were 2.53?0.14 for Secretio bufonis group,3.02?0.14 for Cyclophosphamide group,3.32?0.2 for control group. The survival times of mice bearing intraperitoneal H22 tumor were prolonged in the groups of Secretio bufonis (P

Objective　To investigate the effect of turning scleral flap of self-body over drainage in trabeculectomy.Methods　The surgery was performed on one eye of a rabbit while　the other eye of the same rabbit was conducted with the routine trabeculectomy as the control group. The filtering bleb, intraocular pressure and pathology were observed. Results　The intraocular pressure in the experimental eye was much lower than that in the control group 3～12 weeks after the operations (P＜0.05).As it was within 2 weeks after the surgeries, but there was no significant filtering difference (P＞0.05).The rate of eyes with functional bleb in the experimental group was significantly higher than that in the control group at the postoperative 2～7 weeks .Conclusion　This study suggests the turning of self-body over drainage surgery can help to maintain filtering function for a long time and to prevent complication after filtering surgery.

BACKGROUND:Stem cell transplantation and tissue engineering in repairing bone defects is a hotspots of recent study.OBJECTIVE:To observe the therapeutic effect of engineering repair on bone defect by auto-transplantation of bone marrow stromal cells(BMSCs)DESIGN: Left-right comparative studySETTING:Experimental center of the First Affiliated Hospital of Harbin Medical UniversityMATERIALS:Twelve New Zealand rabbits with birth age of 10 days to 2months were selected ,male or female with body mass of 2 to 2.5 kg.METHODS :The experiment was conducted in the Experimental Center of First Clinical Medical College, Harbin Medical University from June 2002to June 2003. Self-BMSCs were separated for subculture. 1.5 cm bone was intercepted at middle of radius in 12 rabbits so as to simulate complete bone defect. Then, the left radius defect was filled with collagen sponge carrying BMSCs ( experimental side),which was replaced by simple collagen sponge in the right side(control side). Twelve weeks later, rabbits were put to death and the outcomes of both sides were compared.X-ray assessment was accorded to the standardized stage of bone defect repair (bone repair was graded into 0 to 5 grades,grade 5 implies that bone defect has been completely replaced by new bone,grade 0 implies that no new bone repair).MAIN OUTCOME MEASURES:The general observations of rabbit radius defects,X-ray scanning, histological and electro-microscopic observations.At week 12, callus became strong and protruded to bone defects in experimental side,well connecting with broken ends. While broken ends in control group were only connected by fibrous tissue and no continuous callus was found continuously crossing through the bone defect of experimental side, marrow cavity was smooth, but molding was incomplete. While in control side, no continuous callus could be observed passing through the broteoblasts and new stroms could be observed in bone defect of experimental side, but only a few of osteocytes appeared in the broken ends of control vations: The osteoblast observed in the experimental side seems normal and was rich in enlarged endoplasmic reticula energetic in ,protein synthesis and abundant in organelle.CONCLUSION :As osteogenetic cells, BMSCs possess better osteogenesis property. They can be used as seed cellsin bone defect repair by using bone-engineering techniques.

Objective To evaluate the outcome of dorsal double locking compression plate (LCP) in treatment of stretched unstable distal radial fractures.Methods Fourteen cases of stretched unstable distal radial fractures were treated by reduction and internal fixation using straight or L-shaped anatomic LCP via dorsal approach.Wrist functional exercise was conducted immediately after operation.Follow up was made after operation to assess motion pain,functional score of wrist,and complication incidence at postoperative 12 weeks,24 weeks,and 1 year.Results Follow-up was lasted for 5-24 months.At postoperative 12 weeks,24 weeks and 1 year,mean visual analogue scale (VAS) was (1.88 ±0.26) points,(0.87 ± 0.14) points and (0.37 ± 0.06) points respectively and wrist functional score (Gartland-Werley score) was (6.45 ± 1.72) points,(2.73 ± 0.52) points and (2.10 ± 0.31) points respectively.According to Garfland-Werley score in the latest follow-up,the results were excellent in 10 cases,good in two,and fair in two.Besides,one case was combined with myotenositis of extensor pollicis longus muscle tendon and another case with myotenositis of extensor tendon.Conclusion Dorsal double LCP is one of the effective methods for stretched unstable distal radial fractures that can reconstruct anatomical structure of the wrist efficiently and attain satisfactory functional recovery,with no obvious pain.

Objective:To clone the RC-RNase gene and prepare its recombinant prokaryotic construct, and then to express RC-RNase protein using Escherichia coli system. Methods: RC-RNase cDNA was obtained by RT-PCR from liver of Rana catesbeiana, and cloned into pUCm-T plasmid for nucleotide sequencing. Its expression construct was prepared using the 6?His vector pRSET-A, and induced to express by IPTG in Escherichia coli BL21(DE3). Western blotting identified the expression product. Results: A 380 bp long cDNA was obtained from liver of Rana catesbeiana, restriction sites and sequence being consistent to those reported for RC-RNase. After introducing the gene into Escherichia coli and through the induction by IPTG, it was observed a new peptide at the expected position (Mr 16000) on SDS-PAGE gel. This product was proved to be the target protein via Western blotting. It existed in a form of inclusion body and its efficiency reached 12.5% of total bacterial proteins. Conclusion: RC-RNase gene was cloned and expressed in Escherichia coli. The protein could be used for characterizing the biological activities and function of RC-RNase.

Objective To explore the potential of breast cancer stem cells in differentiating into vascular endothelial cells and participating in the angiogenesis of breast tumor.Methods The expressions of mutant P53, CD31 ,VEGF and Her-2 amplification in tumor blood vessels were detected and the single cell suspension of breast cancer was prepared.CD44+/CD24-/low cells were selected and cultured in culture system.The expressions of CD31 and CD105 on endothelial cell surface were detected by EGM-2 endothelial cell culture medium.The ability of uptake of acetylated low-density lipoprotein was measured.The endothelial cells were cultured in vitro to observe their vascular structure.Results The expressions of CD31,VEGF and mutant P53 were found in paraffin sections of breast cancer tissue samples, and they were arranged along the vessel lumen or blood vessel sphere. Immunofluorescence showed that CD31 and DAPI signals were expressed intravascularly in breast cancer tissues. Four samples of Her-2 positive amplification and 9 cases of non-amplification were detected in the samples.The successful separation of breast cancer stem cells was carried out by immunomagnetic sorting.The percentage of CD44+ cells in the pre-sorting cells was (7.5±2.6)% and that of CD44+ cells was about (94.3±4.7)% after magnetic sorting (P<0.05).The ratio of CD24+ cells was (48.2±9.4)% before sorting,and that of CD24+ cells was (4.3±1.6)% after immunomagnetic bead sorting.The proportion of CD105+ cells in mammary gland cells was (4.5±0.9)% and the proportion of CD31+ cells was (6.2±1.3)%.After cultured for three generations,the percentages of CD105+ cells and CD31+ cells were (79.6±9.3)% and (84.1±10.7)%,respectively (P<0.05). DiL-Ac-LDL could be phagocytized by endothelial cells cultured in endothelial cell culture system.Vessel-like structure was found in the endothelial cell group while the control group did not have the tendency of vascular changes.Conclusion Breast cancer stem cell-derived endothelial cells differentiate into endothelial cells in vitro and have the ability of vascular formation,suggesting that breast cancer stem cells may be involved in the formation of tumor blood vessels.

OBJECTIVE To investigate the clinical distribution and drug resistance status of Stenotrophomonas maltophilia and provide clinical guidance for treatment.METHODS Sixty clinical isolates of S.maltophilia were identified with GNI+ cards of VITEK-32.Drug sensitivitiy were detected by Kirby-Bauer disc diffusion method.The data were analyzed by WHONET5.3 software.RESULTS Thirty-eight strains were isolated from sputum(63.3%).Infection caused by S.maltophilia mainly occurred at the departments of respiratory diseases,ICU,old cadre,et al.Sixty isolates of S.maltophilia were highly resistant to imipenem,aminoglycosides and most of ?-lactam antibiotic,but showed the lowest resistance rate(16.7%) to SMZ/TMP.Then resistance rate of S.maltophilia to minocycline,levofloxacin,cefoperazone/sulbactam,piperacillin/tazobactam,and ticarcillin/clavulanic acid was 18.3%,20.0%,21.7%,25.0% and 30.0%,respectively.CONCLUSIONS The drug resistance of S.maltophilia is extremely severe.Among different areas of china the drug resistance is obviously different.Treatment based on drug susceptibility test should be adapted as soon as possible.

OBJECTIVETo investigate the effect of Antrodia cinnamomea on gene expression related to aortal endothelial injury of rats with hyperlipidemia.

METHODFifty SD rats were randomly divided into five groups: the normal control group (NG), the model group (MG), the antrodia cinnamomea groups of low, middle and high doses (AC-LG, AC-MG, AC-HG, 250, 500, 1 000 mg x kg(-1)). The rats were fed with high-fat diets to establish the hyperlipidemia model. After the drug administration for 10 weeks, their serum lipid, SOD, MDA and ox-LDL, LOX-1, P38 MAPK and NF-kappaB mRNA and protein expression were respectively determined, and the aortal endothelial injury was observed under electron microscope.

RESULTIn the model group, the contents of TC, TG and LDL-C significant increased (P < 0.01), whereas the content of HDL-C significant decreased (P < 0.01). Compared with the model group, both the AC-M group and the AC-H group showed reduction in endothelial injury and significant decrease in the content of TC, TG and LDL-C (P < 0.05 or P < 0.01). The content of HDL-C increased, but with no significant difference. SOD activity in serum remarkably increased (P < 0.05 or P < 0.01), MDA and ox-LDL levels dramatically decreased (P < 0.05 or P < 0.01).

CONCLUSIONA. cinnamomea can alleviate endothelial lipid injury by inhibiting the expressions of LOX-1, P38MAPK and NF-kappaB in aorta and better protect aortal endothelial cells from oxidative lipid injury.

Animals ; Antrodia ; chemistry ; Aorta ; drug effects ; metabolism ; ultrastructure ; Atherosclerosis ; blood ; genetics ; prevention & control ; Biological Products ; pharmacology ; Cholesterol ; blood ; Cholesterol, HDL ; blood ; Cholesterol, LDL ; blood ; Endothelium, Vascular ; drug effects ; metabolism ; pathology ; Enzyme-Linked Immunosorbent Assay ; Gene Expression ; drug effects ; Hyperlipidemias ; blood ; genetics ; prevention & control ; Lipoproteins, LDL ; blood ; Male ; Malondialdehyde ; blood ; Microscopy, Electron ; NF-kappa B ; blood ; genetics ; metabolism ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Reverse Transcriptase Polymerase Chain Reaction ; Scavenger Receptors, Class E ; blood ; genetics ; metabolism ; Superoxide Dismutase ; blood ; Triglycerides ; blood ; p38 Mitogen-Activated Protein Kinases ; blood ; genetics ; metabolism

Objective To observe the effect of PaCO_2 modulating during operation on post-operative cognitive function of patients undergoing off-pump coronary artery(OPCAB). Methods Thirty patients undergoing OPCAB were randomly divided into traditional group (G_ 1 , n=15) and modulated group (G_ 2 , n=15). During operation, PaCO_ 2 in G_ 1 maintained 35 mmHg to 39 mmHg with relatively fixed ventilation parameters setting, and PaCO_ 2 in G_ 2 ranged from 40 mmHg to 45 mmHg by adjusting ventilation parameters. Continuous cardiac output index (CCI), SvO_ 2 , regional cerebral O_ 2 saturation (rSO_ 2 ) and PaCO_ 2 were recorded before distal anastomosis(T_ 1 ), at 5 min of the first distal vessel anastomosis(T_ 2 ), second distal vessel anastomosis(T_ 3 ) and third distal vessel anastomosis(T_ 4 ), and 20 min after the completion of coronary artery anastomoses. HDS-R and ADL were used to examine the patients' cognitive function. Results There were no significant differences in pre- and post-operative HDS-R and pre-operative ADL scores between groups. The score of post-HDS-R in G_ 1 was obviously lower than that of pre-HDS-R (P

Objective To analyse the changes of a district general hospital before and after management by Shanghai Renji Medical Group through current situation survey,and explore the conditions for the development of district general hospitals.Methods The Zhujiajiao People's Hospital of Qingpu District in Shanghai was selected,and patients(n=50)and hospital staff(n=100) were conducted current situation survey with questionnaires which included the knowledge and evaluation of the hospital's current situation as well as the changes before and after management by Shanghai Renji Medical Group.Results Half year after management by Shanghai Renji Medical Group,great progress in medical work was achieved,with a favourable development trend.The rate of satisfaction on medical service evaluated by inpatients reached 89.60%,and 81.91% hospital staff had confidence in the sustainable development of the hospital. Conclusion Management by Shanghai Renji Medical Group has brought prospects for the Zhujiajiao People's Hospital.Under current environment,only certain conditions are met can a district general hospital achieve sustainable development.