Numb,one of the important cell fate determinants,plays a key role in regulation of nerve system development,and it is closely related to the occurrence of tumors.It is proven that Numb is implicated in the processes of occurrence,invasion and metastasis of tumors through regulating the way of cell division,cell polarity,epithelial-mesenchymal transitions and several signal pathways,e.g.,Notch,Hh,p53.The expression levels of Numb in cells are related to the malignant degree and prognosis of tumors.It is vital to explore the role of Numb in tumors for treating tumors at the standpoint of Numb.

BACKGROUND: Nitric oxide synthase(NOS) is the key factor for the synthesis of nitric oxide (NO) . Because NO combines with oxygen, hemoglobin and other substances in vivo easily and deactivates quickly, and it is not exactly determined, so determining the activity of NOS is the important link for further studying the pathogenesis of NO in cerebral ischemia/reperfusion (I/R)injury.OBJECTIVE: To study the effect of different types of NOS in the process of cerebral I/R injury.DESIGN: Randomized and controlled animal experiment.SETTING: Instituteof Cerebrovascular Disease, Affiliated Hospital of Medical College of Qingdao University.MATERIALS: This experiment was carried out in the Shandong Key Laboratory of Prevention and Treatment for Encephalopathy from May to December 2005. Twenty-eight adult healthy male Wistar rats, of clean grade, weighing from 220 to 260 g, were provided by the Experimental Animal Center of Shandong University. The involved rats were randomly divided into sham-operation group (n =4) and cerebral ischemia group (n =24). Six time points were set in cerebral ischemia group: ischemia 1 hour reperfusion 6 hours, 12 hours, 1 day, 3 days, 7 days and 14 days, 4 rats at each time point.METHODS: Rat models of middle cerebral artery occlusion/reperfusion were established by suture-occluded method through inserting a suture into the left internal-external carotid artery. The expressions of different types of NOS at different time points after cerebral I/R were detected by immunohistochemical technique.MAIN OUTCOME MEASURES: ①Toluidine blue-stained two groups of nerve cells; ② The expression and distribution of neuronal NOS (nNOS), endothelial NOS (eNOS) and inducible NOS(iNOS) at different time points.RESULTS: ①Karyopyknosis and cell debris appeared in the nerve cells of the injured region of cerebral ischemia group,and there were no significant differences of cells among different time points. ② Six hours after reperfusion, the expressions of nNOS, eNOS and iNOS were found in the neurons of brain tissue and increased with the elongation of time of reperfusion. The regions in which different types of NOS in neurons of brain tissue were expressed were cortical area and corpora striata. nNOS and iNOS were highly expressed within 12 hours to 7 days after reperfusion in the brain, and eNOS was highly expressed within a short time period, i.e. 6 hours to 3 days after reperfusion. eNOS expression increasing and decreasing occurred earlier than nNOS and iNOS. But the expressions of three kinds of NOS all reached peak on the first day after reperfusion. The changing tendencies of the expression of three kinds of NOS in the cortical area and corpora striata were the same basically.CONCLUSION: After cerebral I/R injury, the high expression of eNOS occurs early and lasts for a short time, while that of nNOS and iNOS occurs late and lasts for a long time.

Community rehabilitation of cardiovascular disease is of great significance. Exercise therapy of cardiovascular disease in communities is necessary and feasible. At present, the main problems China faced to carry out community exercise therapy of cardiovascular disease include: cardiovascular patients with a weak sense of community exercise therapy, lack of professional rehabilitation personnel, inadequate community-based exercise therapy practice and lack of community rehabilitation funding. To solve above problems, we should strengthen the community exercise therapy practice of cardiovascular disease, and promote the cooperation between community rehabilitation and hospital rehabilitation. In all, comprehensive efforts should be made in order to solve the problems.

Bronchogenic Cyst ; Child ; Humans ; Male ; Neck ; pathology ; Young Adult

Aggregatibacter actinomycetemcomitans ; physiology ; Bacterial Adhesion ; Biofilms ; Periodontal Diseases ; microbiology ; Porphyromonas endodontalis ; physiology

OBJECTIVEThis study aims to construct a three-dimensional finite element model of a maxillary anterior teeth retraction force system in light wire technique and to investigate the difference of hydrostatic pressure and initial displacement of upper anterior teeth under different torque values of tip back bend.

METHODSA geometric three-dimensional model of the maxillary bone, including all the upper teeth, was achieved via CT scan. To construct the force model system, lingual brackets and wire were constructed by using the Solidworks. Brackets software, and wire were assembled to the teeth. ANASYS was used to calculate the hydrostatic pressure and the initial displacement of maxillary anterior teeth under different tip-back bend moments of 15, 30, 45, 60, and 75 Nmm when the class II elastic force was 0.556 N.

RESULTSHydrostatic pressure was concentrated in the root apices and cervical margin of upper anterior teeth. Distal tipping and relative intrusive displacement were observed. The hydrostatic pressure and initial displacement of upper canine were greater than in the central and lateral incisors. This hydrostatic pressure and initial intrusive displacement increased with an increase in tip-back bend moment.

CONCLUSIONLingual retraction force system of maxillary anterior teeth in light wire technique can be applied safely and controllably. The type and quantity of teeth movement can be controlled by the alteration of tip-back bend moment.

Adult ; Branchial Region ; Fistula ; surgery ; Humans ; Male ; Neck ; surgery ; Pharynx ; surgery

Objective:To investigate the effect of short-term intensive treatment with insulin on metabolic control,?-cell function and insulin resistance in newly diagnosed type 2 diabetic patients. Methods:Thirty-eight newly diagnosed type 2 diabetic patients were randomly divided into two groups and treated with continuous subcutaneous insulin infusion(CSII) or multiple daily insulin injection(MDI) for 1 month.Fasting blood glucose(FBG) and lipid profiles were measured,and oral glucose tolerance test(OGTT)was performed before and after the treatment.The second phase insulin and C peptide secretions were measured by calculating area under curve(AUC) in OGTT.HOMA model was used to evaluate ?-cell function((HOMA-?)) and insulin resistance. Results:Excellent control of FBG was achieved after 1 month intensive treatment.(HOMA-?) was improved significantly. Conclusion:The excellent metabolic control and ?-cell function improvement can be achieved by short-term intensive insulin therapies like CSII or MDI.

Objective To investigate the neuroprotective effects and mechanism of phycocyanin in cerebral ischemia reperfusion injury in rats.Methods The model of middle cerebral artery occlusion reperfusion(MCAO/R) was established using the intraluminal filament occlusion with healthy adult male Wistar rats treated by phycocyanin.The apoptosis and the expression of bFGF and FGFR-1,IGF-1 and IGF-1R,iNOS and SOD were respectively determined by TUNEL and immunohistochemical staining to evaluate the effects of phycocyanin on above indexes.Results ① The rats showed neurobehavioral function disorders and the number of nerve cells reduced while apoptotic cells increased in ischemic area after ischemic reperfusion.In phycocyanin group,the number of apoptotic cells reduced siginificantly during reperfusion 12h~3d and the neurobehavioral function was better than that those in control group during reperfusion 7~14d.② In control group,the expressions of bFGF and FGFR-1 increased successfully from reperfusion 6h and reached a maximum at 1d,then subsided gradually in cortex and striatum.In phycocyanin group,the numbers of bFGF and FGFR-1 positive cells were higher than those in control group at the same time-points,which were significantly at reperfusion 1d and 12h~3d respectively.③ The expressions of IGF-1 and IGF-1R increased in cortex and striatum following cerebral ischemic and reperfusion.In phycocyanin group,the numbers of IGF-1 and IGF-1R positive cells in each time-point were higher than those in control group,which was significantly during reperfusion 6h~1d.④ In cotex and striatum,the iNOS and SOD expressed strongly and keep high level during 6h~7d with the maximum at reperfusion 1d.In phycocyanin group,iNOS expressed significantly higher during 12h~1d whlie SOD lower during 6h~1d than those in control group at the same time-point.Conclusion Phycocyanin might play a intrinsic antioxide effect by up-regulating SOD and down-regulating iNOS to inhibit neuronal apoptosis,and enhance the neuronal repairation by means of inducing the expressions of bFGF and IGF-1 following cerebral ischemic reperfusion in rats.

Objective To investigate the change of transmembrane potential during Noradrenaline's early preconditioning phase and probe the mechanism of action.Methods Primary culture myocardial cell of neonate rat were divided into three groups at random.GroupⅠ is control group,Group Ⅱis treatment group by hypoxia,Group Ⅲ is treatment group by NA.Group Ⅰ didn't give any drug to culture for 40minutes;Group Ⅱ treated for 40minutes by hypoxia,Group Ⅲ exposed to Noradrenaline(0.2?g/ml)for 10 minutes then treated with hypoxia for 40 minutes.The fluorescence intensity of rhodamine-123 marked mitochondria were detected by flow cytometry.Results The fluorescence intensity of three Group were test by analysis of variance(F=461.3,P