BACKGROUND:Reaction velocity for brain imagination is a major criterion in measuring quality of brain computer interface (BCI)system.Therefore,electroencephalogram (EGG) analysis,especially the feature extraction screening,is very important.Reduction the number of features is an important way to improve the speed.OBJECTIVE:To screen EGG features using reduction algorithm,and to decrease the number of EGG features.METHODS:Firstly,by various analytical methods,the EGG features were extracted and classified;then,discreting the continuous EGG to establish an EGG information table;At last,reduction theory was used to reduce EGG features,and to sort the data according to reduced attributes,the accuracy of sorting was validated.RESULTS AND CONCLUSION:Using reduction algorithm and feature marking,discreting the continuous EGG to establish an EGG information table,and then choose the features from the discrete data.The results show that classification accuracy has not been reduced but the number of features was reduced.However,this method can be used marking features in two sorts,how to marking features of multi-sorts and to perform data reduction is a key point in further study.

Objective To investigate the intelligence, individuality and behavior characteristics of epilepsy children with sub-clinical seizure. Methods The intelligence, individuality and behavior characteristics of the patients and normal age-matched children were evaluated by WISC, EPQ and CBCL. Results Compared with normal age-matched children, the code and number of WISC were obviously decreased in the children with epilepsy (P

Objective To investigate the effects of low molecular heparin(LWMH)on cytokines(TNF-?,IL-1? and IL-10)in blood plasma and bronchoalveolar lavage fluid of invasive pulmonary aspergillosis(IPA)mice.Methods The neutropenic IPA mouse models were established by administration of cyclophosphamide for immunologic function inhibition and intranasally challenge with Aspergillus fumigatus conidia(1?106 conidia/mouse).One hundred and twenty mice were randomly divided into 4 groups:normal control,IPA model,normal saline+LWMH and IPA+LWMH group.Normal saline+LWMH group and IPA+LWMH group received LWMH(subcutaneous injection,1 000 IU/kg,qd?2 d).Normal control and IPA model group received normal saline instedad of LWMH.At 4,8,12,24 and 48 h after inoculation,six mice were randomly taken from each group to be sacrificed.ELISA method was used to determine the concentrations of TNF-?,IL-1? and IL-10 in blood plasma and BALF.Results TNF-?,IL-1? and IL-10 in blood plasma and BALF increased significantly several hours after inoculation of conidia in IPA model and IPA+LWMH group.There were significant higher concentrations of TNF-? and IL-1? in blood plasma and BALF in IPA+LWMH group than in IPA model group(P

Objective To study the incidence of malposition of catheter at different body positions during the operation of peripherally inserted central catheter (PICC),and then select the optimum position to increase the success rate of insertion. Methods 155 patients were randomly divided into the horizontal position group (55 cases),the semi-reclining position group (49 cases) and the sitting position group (51cases).They all used chest X-ray to conffirm the position of top end of the catheter after insertion and then comparing the incidence rate of malposition of catheter among three groups. Results After insertion,11 patients' catheters were found malposition.Among them,8 patients were in the semi-reclining position group (incidence rate 16.3％),2 patients were in the horizontal position group (incidence rate 3.6％) and only one patient was in the sitting position group (incidence rate 1.9％ ).Incidence rate of catheter malposition in the semi-reclining position group was significantly higher than other two groups. Conclusions The best position for PICC is the horizontal position.If the patient has expiratory dyspnea or need to adjust the malposition catheter,sitting position can be used.Semi-reclining position should be avoided in the operation of PICC.

Bone marrow microenvironment (BMM) is the environment on which leukemia cells depend. It contains stem cells, bone marrow stromal cells, and abundant cytokines, which can regulate the differentiation and proliferation of leukemia cells. The regulation of BMM on the differentiation of leukemia cells is a complex process that can act on different targets and signaling pathways. It mainly includes hypoxia-inducible factor, integrins, Notch, and Wnt/β-catenin signal pathways. The study of relationship between BMM and leukemia cell differentiation can help to find pathways and targets that induce leukemia differentiation which will find new directions for the treatment of leukemia.

Objective To investigate whether tissue engineered bone with implanted vascular bun-dles can up-regulate release of vascular endothelial growth factor (VEGF) in models of femoral defect in rabbits.Methods Thirty-two rabbits were randomized into 2 even groups.In both groups, a segmental bone defect of 15 mm in length was made at the left femur before a tissue engineered bone was inserted into the defect.In the experimental group, a femoral vascular bundle was implanted into the tissue engineered bone.In the control group, there was no vascular implantation.At 2, 4, 8, and 12 weeks after implantation, samples were taken to determine new bone formation by histology and expression level of VEGF by immuno-histochemistry.Results The new bone formation was significantly higher in the experimental group at the end of 4, 8, and 12 weeks(P < 0.05) .The expression level of VEGF in the experimental group was also significantly higher than in the control group at all time points after operation, and the expression of VEGF peaked at 4 weeks.Conclusion Tissue engineered bone with vascular bundle implanted can up-regulate VEGF release in models of femoral defect in rabbits.

Objective To compare the effect of injection with botulinum toxin type A (BTX-A) before serial casting with BTX-A injection alone for the treatment of spastic equinus in children with cerebral palsy (CP).Methods Sixty patients were divided into an experimental group and a control group with 30 patients in each.Those io the experimental group received a BTX-A injection followed by serial casting,while the controls received BTX-A only.Before treatment and 1 month,3 months and 6 months after treatment,the dorsiflexion range of motion (ROM)of the ankle recorded while the knee in flexion and extension were measured,and gait was evaluated with an observational gait scale.Results Before treatment there was no significant inter-group difference in any of the 3 outcome measures.At 1 montb,3 months and 6 months after treatment,there were significant inter-group differences in all 3 measures,and also significant differences compared with before treatment in both groups.Conclusion Lower muscle tone,greater ankle mobility and better gait patterns can be promoted in CP children with spastic equinus using serial casting combined with BTX-A injection.The improvements may last longer than those after BTX-A injection alone.

Objective To track the migration and incorporation of intravenously injected, magneti?cally labeled endothelial progenitor cells ( EPCs) from mouse bone marrow into the blood vessels in a rapid?ly growing HCC model by microMR (7.0 T). Methods This study was approved by the Institutional Com?mittee on Animal Research. H22 hepatic ascitic cancer cells was directly injected into the left liver lobe of BALB/c nude mice ( n=15) . EPCs derived from bone marrow of C57BL/6 mice were isolated and cultured. The third passage EPCs were collected and labeled with 25 μg/ml superparamagnetic iron oxide ( SPIO) and poly?l?lysine (PLL) complex (SPIO?PLL). MTT assay and flow cytometry were used to evaluate the difference of growth curve and apoptosis between labeled and unlabeled EPCs. EPCs labeled with SPIO?PLL were injected into mice via tail vein in experiment group (on the 3rd day after establishing HCC model) (n=15) and control group (n=6). The signal changes of tumor (the 1st, 3rd and 7th day after transplantation) were observed by microMR. Prussian blue staining and immunohistochemistry staining of CD31 were per?formed. MRI findings were confirmed by histomorphology. Two?sample t test was used to analyze the data. Results Single tumor was showed in the liver of all mice 3 d after establishing models. Labeling with SPIO?PLL at a concentration of 25μg/ml did not alter cell growth curve ( measured by MTT assay;t=0.281, P>0.05) and cell apoptosis (analyzed by flow cytometry). The apoptosis rates of SPIO?PLL labeled and un?labled EPCs were (12.31±1.43)% and (11.57±1.24)% in early stage, and (0.55±0.07)% and (0.49± 0?05)% in late stage. No significant differences were observed between them (t=0.967, 1.060; both P>0?05) . Migration and incorporation of transplanted and labeled cells into tumor were documented with in vivo microMR as low signal intensity at the tumor periphery as early as the 3rd day after EPCs administration in preformed tumors (4/5). Prussian blue staining showed iron?positive cells at the sites corresponding to low signal intensity on MRI. The positive cells expressing CD31 existed in intratumoral and peritumoral vessels. There was no signal change in control group at all time points. Conclusions MRI can demonstrate the in?corporation of magnetic labeled mouse EPCs into the implanted hepatoma. It may be helpful for early diagno?sis and therapy of liver tumor.

AIM:To investigate the autophagy induced by sepsis and acute kidney injury , and the regulation of phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway in this process.METHODS: The rats were subjected to cecal ligation and puncture ( CLP) or sham operation .Histopathologic changes of the renal tissues were examined by HE staining .Blood urea nitrogen ( BUN) and serum creatinine ( SCr) were measured by chemical colorime-try.The protein expression of microtubule-associated protein light chain 3 I/II (LC3 I/II), beclin-1 and p-Akt at different time points after CLP was detected by Western blotting .In vitro, human proximal tubular epithelial cell line HK-2 were treated with LPS to induce autophagy .The protein expression of LC 3 I/II and p-Akt in the HK-2 cells after LPS treatment at different time points and different concentrations was detected by Western blotting .These molecules in HK-2 cells and apoptosis of HK-2 cells treated with LPS plus PI3K inhibitor or Akt inhibitor were also detected .RESULTS: Compared with sham group , the severe changes of renal histopathological injuries in CLP groups were observed , the levels of BUN and SCr in CLP groups were significantly increased .LC3 I/II, beclin-1 and phosphorylation of Akt gradually increased after CLP.After treatment with LPS, the expression of p-Akt (308) in the HK-2 cells gradually increased in a dose-and time-dependent fashion.The expression of beclin-1 and p-Akt (472) reached a peak at 8 h or 10 mg/L LPS treatment.Treat-ment with PI3K or Akt inhibitor down-regulated the expression of LC3 and promoted the apoptosis of HK-2 cells.CON-CLUSION:Autophagy in the kidney is induced by sepsis and acute kidney injury .PI3/Akt signaling pathway may be in-volved in this process .

Thirty cases of pituitary stalk interruption syndrome were divided into normal height (group 1) and short stature (group 2).There was no significant difference in growth hormone or insulin-like growth factor-Ⅰ levels between two groups(P＞0.05).Expected height and body mass index in group 1 were higher than those in group 2,while testosterone,cortisol,and FT4 were lower.Height were positively correlated with age,expected height,birth weight,and body mass index.The height of patients with pituitary stalk interruption syndrome depended on both genetic factors and the hormones from pituitary-target gland.