Objective To explore the role of endothelial progenitor cells (EPCs)in improving functional recovery and promoting neurogenesis in damaged area of ischemic rat brain by MRI,neurological severity score (NSS),and pathological examinations.Meth-ods EPCs wereseparated,cultured,and identified,ultrasmall superparamagnetic iron oxide(USPIO)particles was used to label EPCs in vitro.Transient middle cerebral arterial occlusion(tMCAO)was successfully performed in 30 adult SD rats.Magnetically labeled cells(the experimental group)and normal saline (the control group)were injected intravenously into the tMCAO rats through the tail vein respectively,then MR imaging and NSS was performed 0 day,2 days,4 days,6 days and 8 days later.At last the paraffin-embedded rat brain tissues were obtained and examed by Prussian blue staining and Measurement of microvessel density.Re-sults EPCs wereseparated,cultured,and identified successfully.MR imaging showed significant low signal intensity at the ischemic area on T2 WI sequence.Prussian blue staining images were corresponding to the EPCs staining in vitro.The NSS and microvessel density in experimental group were significantly higher than in control group.Conclusion EPCs can migrate to the damage zone, improve functional recovery and promote neurogenesis in damaged area of ischemic rat brain,and may be a new source of multipoten-tial stem cells for stroke treatment.

Objective To investigate clinical efficacy of additive LiuJunZi decoction in treatment of patients with chronic obstructive pneumonia ( COPD) of both lung and spleen deficiency in stable phase.Methods A total of 58 patients with deficiency of both lung and spleen type stable COPD patients were randomly divided into treatment group and control group by a random number table, 29 cases in each group, patients in two groups were treated with salmeterol and fluticasone propionate powder for inhalation.On this basis, the treatment group were given additive Liujunzi Decoction, orally, with 3 months treatment.The clinical signs and symptoms of patients, pulmonary function, index of sputumand acute attack proportion in a year were observed and compared.Results After different treatment, total efficiency was 93.1% in treatment group, which was obviously higher than 65.5%in control group (P<0.05).After treatment, the values of FEV1 and FEV1/FVC improved compared with before treatment, and the above indexes of treatment group significantly improved compared with control group (P<0.05).The HDACs activety, levels of TNF-αand IL-8 mproved compared with before treatment, and the above indexes of treatment group significantly improved compared with control group (P<0.05).The acute attack was two cases in treatment group(6.9%), seven cases in control group(24.1%), but the difference had no statistically significant.Conclusion The additive Liujunzi decoction in the treatment of both lung and spleen deficiency type chronic obstructive pulmonary disease ( COPD) in stable phase has exact clinical curative effect, can significantly improve clinical symptoms and laboratory indexes, control the progression of the disease, and improve life quality of the patients.

Objective To evaluate the efficacy, safety and complications of minimally invasive percutaneous radiofrequency ablation(PRFA) therapy for hepatic cavernous hemangioma(HCH). Methods Twelve patients with total 15 HCHs (2.5cm to 9.5cm) were treated by using RF-2000 generator and 10-needle LeVeen electrode percutaneously guided by B-ultrasound. Tumors larger than 3cm were treated by multiple overlapping ablations that encompassed the entire lesions as well as an approximately 0.5cm rim of normal liver tissue. Results The procedures were successful and the patients recovered well without the complications of bleeding or bile leakage after mean 48-month follow up period. Spiral CT scanning showed that the contrast enhancement was disappeared within the lesions or at their periphery in all cases. The mean diameter of the ablated HCHs reduced 68%. Conclusion The results suggested that PRFA therapy was a minimally invasive, simple, safe, and effective approach for treating HCHs in selected patients.

Objective To evaluate the expression of Sp3 gene of peripheral blood mononuclear cells (PBMC) in multiple sclerosis (MS) patients and the correlation between Sp3 gene expression and clinical manifestation Methods Two pairs of primers were used to amplify cDNAs generated from 33 MS patients and 90 controls including healthy controls, other nonimmunological neurological disease controls and the other neuroimmunological diseases than MS controls Results The deficient expression of Sp3 gene in MS patients (45%, 15/33) is statistically significantly higher than that in the other 3 control groups ( P

Objective:To detect the influence of the early Class Ⅲ orthopedic treatment on the development of the maxillary.Methods:Four adolescence rhesus monkeys were fitted with casting Twin-block magnetic appliance(TMA),two were put to death after 1.5 months and another two after 3 months,zygomaticofrontal sutures were harvested,and performed histological examination using optical and electron microscope.Another two monkeys without appliance were served as control.Results:The maxillary sutures were rebuilt,after Class Ⅲ functional orthopedic,and the zygomaticomaxillary suture,zygomaticotemporal suture and transverse palatine suture were especially active.Electron microscopy results showed that osteoblasts and fibroblasts were active,and fibroblasts showed more active effects.Conclusion:During the treatment of the Class III functional orthopedics,maxillary sutures take part in the rebuilding actively,and there are lots of new bone formation along the sutures.

Objective To study the relationship of ampicillin resistance and?lactamase production, and gene mutation on pbp5 gene fragment in Enterococcus faecium. Methods?lactamase production was tested with nitrocefin, the pbp5 gene fragment of 57 isolates of ampicillin-resistant Enterococcus faecium (ARE. faecium) was amplified by PCR, the mutation of amplified pbp5 gene was detected by single-strand conformation polymorphism(SSCP), the specific mutation types were confirmed by sequencing. Results?lactamase was negative in 57 isolates of ARE. faeciums; there were 3-6 gene mutation sites on pbp5 gene fragment, and the frequent mutation sites were the position 485 ,499 and 466'. Conclusion The gene mutation of pbp5 gene fragment may play an important role in the ARE. faecium.

Objective To investigate the incidence of six virulence determinants and two phenotypes in clinical strains of Enterococci.Methods PCR and dot blot were used to detect the six virulence determinants in 145 clinical isolates. The two phenotypes , including ?-hemolysis and gelatin hydrolyze ,were performed on agar plate containing 7% rabbit blood and Todd-Hewitt agar plate supplemented with 3% gelatin, respectively.Results In E. faecalis and E. faecium ,the rates of detection of the six virulence determinants were gelE72.9% vs 30.6%,efaA79.2% vs 36.7%,cylA54.2% vs 34.7%,esp34.4% vs 36.7%,agg 18.8% vs 0, ace28.1% vs 0, respectively; the ? hemolysis was 45.8% vs 20.4%,the gelatin hydrolyze was 35.4% vs 16.3%.Conclusions E. faecalis possess more virulence determinants and phenotypes than E. faecium do. The virulence determinants are more common among the strains isolated from urine sample than those from among sputum . Most of the E. faecalis carry virulence determinants of gelE,efaA and cylA .

Objective To investigate the effect of celastrol on space learning capability and expressions of beta-amyloid (Aβ) 40 and Aβ42 in hippocampus in APPswe/PS1dE9 double transgenic mouse after partial hepatolobectomy.Methods The 3-month-old APPswe/PS1dE9 double transgenic mice (n =96) were randomly divided into three groups according to the random number table method.Surgery group (group S, partial hepatolobectomy;n =32), celastrol group (group C, injections of dimethyl sulphoxide/DMSO and celastrol for 3 days before undergoing partial hepatectomy, on the surgery day, and for a further 4 days after surgery;n =32), and DMSO group (group D, injections of DMSO for 3 days before undergoing partial hepatectomy, on the surgery day, and for a further 4 days after surgery;n =32).Eight mice were selected randomly in each group and were Morris-water maze trained for continuous 5 days.Theirs learning and memory abilities were evaluated at 1,3, 7 and 14 d after surgery, respectively.Hippocampus was collected and the changes of β40 and Aβ42 were measured by enzyme-linked immunosorbent assay (ELISA) at the time set in advance in each group.Results The average escape latency of group C was significantly shorter than groups S and D at 3, 7 and 14 d after partial hepatectomy (P ＜ 0.05).Times of passing through the platform groups S and D were significantly less than group C (P ＜ 0.05).The expressions of Aβ40/Aβ42 in group C were lower than group S and group D at 1, 3, 7 and 14 d after partial hepatectomy (P ＜ 0.05).Conclusions Through decreasing the expressions of Aβ40 and Aβ42 in hippocampus,celastrol improves the space learning capability in APPswe/PS1dE9, the double transgenic mouse after partial hepatolobectomy.

Objective To study the efficacy of repetitive transcranial magneticstimulation(rTMS) of the right prefrontal cortex combined paroxetine for patients with obsessive-compulsive disorder ( OCD) under doubleblind , sham-controlled conditions. Methods Patients were randomly assigned to 2 sessions of real ( n = 32) or sham ( n = 31) rTMS and both group received Paroxetine treatment. rTMS treatments lasted 20 minutes,and the frequency was 10 Hz and the intensity was 100% of motor threshold for real rTMS. Psychopathology was assessed by HAMA.Y-BOCS before the treatment,immediately after the experimental treatment,and 1,2,4,6 weeks after the experimental treatment by an independent reviewer. Results In combined therapy group,9(32. 14% ) recovered, 10(35.71% ) remitted,5( 17. 86% ) improved,4( 14. 29% ) remained unresponsive. In contrast,there were 4(16.36%) recovery,5(21.82%) remission, 10(38.18% ) improvement,6(23.64% ) unresponse in drug therapy group. The outcome of ITT showed all the patients in the two groups significant improvement (the scores of YBOCS( F=56.258, P=0.000) ;the scores of HAMA( F=41.675, P=0.000) after the treatment,but the effectiveness in the combined therapy group was better than that in the drug therapy group (the scores of Y-BOCS, F= 13.652, P=0.028;the scores of HAMA, F= 11.632, P=0.031). Conclusions Repetitive transcranial rTMS of the right prefrontal cortex combined paroxetine is more effective than paroxetine only in treatment of refractory OCD.

Objective:To investigate the methylation of CpG island of metallothionein-3 (MT-3) gene in esophageal cancer tissues and normal tissues in middle and south area of Hebei Province and Chaoshan area of Guangdong Province and compared the results with those in low risk area of esophageal cancer. Methods:The blood samples from 10 normal volunteers, 10 embryonic esophageal tissues, 20 esophageal mucosa tissues from normal subjects in low risk area as well as 30 fresh surgical specimens of esophageal cancer and 30 normal marginal tissues in the high risk middle-south Hebei Province and Chaoshan area were collected. Methylation-specific polymerase chain reaction (MSP) was used to detect the methylation status of the CpG island of MT-3 gene in these samples. Its relationship with clinicopatho-logical features was analyzed. Results:There were 20 (33.3%) cases with MT-3 methylation in the marginal tissues of esophageal cancer from high-risk area, which was higher than that in the normal mucosa from low-risk area (P=0.013). And there were 49 (81.7%) cases with MT-3 methylation in esophageal cancer tissues, which was higher than that in normal marginal tissues (P<0.001). But there was no significant difference in the methylation degree between middle-south of Hebei Province and Chaoshan area (P=0.739). Conclusion:MT-3 methylation widely exists in esophageal mucosa and carcinoma tissues. Acquired stimulus may be the main cause of these methylations.