Clinical islet transplantation is currently being explored as a treatment for its superiorities of lesser in vasive,lower risk,avoiding or preventing chronic complications.Because of the difficulty in isolation,purification and transplantation,the yield of islet is lower than needed;shortage of donor,difficulty in obtaining adequate islet cells for sustaining B cell mass and function over time,and immune rejection reactions are the hurdels to widespread application of islet transplantation.

Background and purpose:Backgrounds and Objective: Oxaliplatin is a third-generation platinum compound,there are some distinct differeuces in mechanism between cisplatin and oxaliplatin,and oxaliplatin is less toxic Poorly differentiated cartinoma is the most common histological type,for nasopharyngeal carcinoma,although radiotherapy is the basic therapeutic approach to nasopharyngeal carcinoma,chemotherapy is also important for recurrent and metastatic nasopharyngeal carcinoma,so in this work we analyzed the effects of oxaliplatin on nasopharyngeal carcinoma cell lines in vitro.Methods:CNE2 was incubated with oxaliplatin at various concentrations and times,cell growth inhibition was assessed by MTT-microculture tetrazolium assay,cell-cycle kinetics and apoptosis were analyzed by flow cytometry and microscopy transmission electron.Results:Growth of CNE2 cells was significantly inhibited in a dose-dependent and time-dependment fashion.The inhibition of cell growth inhibition was(95.6?0.7)% after incubation with 100 ug/ml oxaliplatin for 48 hours,the cell was arrested at G_(2)/M and apoptosis was induced.When CNE2 cells were treated with oxaliplatin at the concentration of 0、0.03、4.0、100 ?g/ml,the rates of CNE2 cell apoptosis were(0.19?0.17)% 、(0.37?0.09)%、(5.50?1.08)%、(9.43?0.09)%,respectively.24 hours after 20 ?g/ml the CNE2 cells were characterized by chromatin condensation,chromatin crescent formation,nucleus fragmentation and apoptosis body by transmission electron microscopy.Conclusions:Oxaliplatin suppresses the growth of CNE2 cells in vitro by causing cell-cycle arrest and cell apoptosis.

In recent years,thyroid cancer incidence increased year by year,after the effective prevention of iodine deficiency disorders in many countries,which caused widespread attention in academia.Whether is this increasing trend related to the implementation of policy of iodized salt in many countries? Currently,the association between iodine intake and thyroid cancer is unclear.This review article describes the metabolic and nutritional status of iodine,and the epidemiology of thyroid cancer,and further elaborates the relationship and the pathogenesis of iodine and thyroid cancer.

Aiming at the issue of motor imagery electroencephalography (EEG) pattern recognition in the research of brain-computer interface (BCI), a power feature method based on discrete wavelet packet decomposition is proposed for the channels C3 and C4. Firstly, a six-border Butterworth filter is used to denoise the two-channel EEG signals. Secondly, two-channel EEG signals are decomposed to five levels using Daubechies wavelet and the fourth level and the fifth level are chosen to reconstruct the signals and compute its power feature. Finally, linear discriminant analysis (LDA) is utilized to classify the feature and the Kappa value is utilized to measure the accuracy of the classifier. This method is applied to the standard dataset BCICIV_2b-gdf of BCI Competition 2008, and experimental results show that this method reflect the feature of event-related synchronization and event-related desynchronization obviously and it is an effective way to classify the EEG patterns in the research of BCI.
Brain-Computer Interfaces ; Electroencephalography ; instrumentation ; methods

Objective Under the psychological stress framework,to investigate the changes of psychological stress before and during the IVF treatment,and the effects of psychological factors on IVF outcome. Methods We assessed factors of psychological stress before and during the IVF treatment with PSS,STAI,SDS and MCMQ. Results 324 women completed the questionnaires. The baseline SDS and PSS scores of 25.26?4.944 and 44.41?9.812,respectively were significantly higher than norm scores(P

Objective To investigate the technique and effect of CT-guided implantation of ~(125)I seeds for patients with brain glioma.Methods A total of 60 cases of brain glioma,that had been diagnosed by CT,MRI,or enhanced MRI,were enrolled in this study.Among the patients,20 were primary cases,and 40 were recurrent cases after surgical treatment (23) or radiotherapy (17).Before implanting the ~(125)I seeds,we pathologically comfirmed the diagnosis by using CT-guided percutaneous puncture. According to the pathological results,we determined the number and distribution of ~(125)I seeds,matched peripheral dose (MPD),and PTV;and then implanted the seeds (4 to 46 seeds per patient) under the guidance of CT.The radioactivity per seed was set at 26, 30,or 33 Mbp,thus the total radioactivity ranged from 132 to 1196 Mbp.The distance between the seeds was 0.5 to 1.0 cm.And the MPD ranged from 80 to 119 Gy.In each patient,percutaneous puncture was performed at one or two sites,and the direction of the needle was changed for 2 to 5 times at each punctural site.The outcomes of the implantation was confirmed by CT scan immediately after the procedure.The patients were followed up by using CT.Results The criteria of curative effect recommended by WHO was adopted.According to these criteria,the effective rate of the procedure was 48.3% (29/60),55.0% (33/60),67.3%(37/55), and 70.0% (35/50) in 1,2,3,and 6 months after the operation,and the rate of hydrocephalus relief was 55.0% (33/60),65.0% (39/60),76.4%(42/55),and 78.0% (39/50) respectively.The patients achieved 1-and 2-years rates of 63.8%(30/47) and 55.2% (16/29) during the follow-up.The median survival time was 18 months in this series (28 months in the patients withⅠanⅡgrades glioma,and 16 months forⅢtoⅣgrades).The total 1-and 2-year survival rate was 78.3% (47/60) and 48.3% (29/60) in our patients,among whichⅠandⅡgrades glioma cases achieved 90.0% (27/30) and 80.0% (24/30),respectively,while those who hadⅢandⅣgrades tumor had lower survival rates [66.7% (20/30) and 16.7% (5/30)].Four patients developed puncture site bleeding,3 had replacement of the particles,and 6 suffered from local necrosis of the brain tissues.No surgery-related death occurred in the patients.Conclusions CT-guided implantation of ~(125)I seeds is effective for the local control of brain glioma.By using the procedure,the brain edema and other symptoms can be relieved,and the survival rate can be increased.

Objective To investigate the relationship between the serum ghrelin level and ?-cell function after treatment of patients with newly diagnosed type 2 diabetes mellitus.Methods 34 patients with newly diagnosed type 2 diabetes mellitus were divided into three groups of pre-treatment(DM0),two weeks after treatment(DM1)and six months after treatment(DM2).Intravenous glucose tolerance tests(IVGTT)were performed and blood glucose,HbA1C,ghrelin,insulin were measured during the study.Insulin sensitivity was assessed by homeostasis model assessment(HOMA).Results(1)Compared with DM0 group,beta-cell function and the mean AUC of insulin were dramatically improved in groups of DM1 and DM2(all P

Objective:To observe the changes of 5-HT1B and D1DR expression in nucleus of SNr/GPi-VL-SMA pathway in pre and post-exhaustive exercise,and investigate the central mechanism of SNr/GPi-VL-SMA pathway modulating the occurrence and development of exercise-induced fatigue.Method:Twenty-four male Wistar rats were randomly divided into control group (CG),immediately after exhaustion group (EG),and 90min after recovery group (RG),each consists of 8 rats.The expression level of 5-HT1B and D1DR receptors in each group were observed with the immunohistochemistry technique.Result:Compared with CG,the positive cell area/scanning area value (R value) and the average optical density value (AOD value) of 5-HT1B receptor in SNr and GPi of the EG and RG rats both decreased significantly (P ＜ 0.05),while the R value and AOD value of D1DR both increased significantly(P＜ 0.05).The R value and AOD value of 5-HT1B receptor in VL of EG and RG rats increased significantly(P＜0.05,P＜0.01).In SMA,the R value and AOD value of 5-HT1B receptor of EG and RG rats increased significantly (P＜ 0.05),while,the R value and AOD value of D1DR receptor decreased significantly (P ＜ 0.05).Conclusion:Changes of 5-HT1B receptor and D1DR receptor expression in the nuclei of ‘SNr/GPi-VL-SMA'pathway caused the changes of the neurotransmitters release,thus affecting the excitability of the electrical activity of neurons,this might be one of the important ways for ‘SNr/GPi-VL-SMA'pathway modulating the exercise-induced fatigue and exercise performance.

Objective To study the changes of urodynamics of middle-aged(35-55 years old)female patients with urinary incontinence and improve the diagnosis and treatment.Methods Analyze and compare the urodynamics between 56 cases of middle-aged female patients with urinary incontinence and 17 cases of normal control.Results Among the 56 patients,33 cases with stress incontinence(SUI group 58.93％),9 cases with urgency urinary incontinence(UUI group 16.07％),14 cases with mixed urinary incontinence(SUI/UUI group 25.00％).There was significant difference on maximum flow rate(Qmax[27.72 ± 5.21]ml/s vs[20.45 ±7.15]ml/s,P ＜0.05)between the SUI group and control group.The beginning of a sense of capacity(FS),normal urination feeling(ND),strong feeling of urination(SD)and urgent urination feeling(UD)were (135.65 ± 42.73)ml,(166.24 ± 51.42)ml,(315.75 ±42.34)ml,(320.24 ± 45.03)ml and(132.70 ±40.65)ml,(160.70 ± 50.44)ml,(320.75 ± 42.34)ml,(335.75 ± 51.98)ml in the UUI group and control group respectively.And there were significant differences on the four indexes between UUI group and control group(P ＜ 0.05).There was significant difference on ALPP([62.29 ± 25.40]cm H2O vs[88.30 ± 28.54]cm H2O,P ＜0.05)between the SUI group and SUI/UUI group.Pressure at maximum flow rate(Pdet-Qmax,[24.29 ± 6.24]cm H2O vs[34.45 ± 8.20]cm H2 O,maximum urethral pressure(M UP([68.20 ± 18.27]cm H2O vs[87.14 ± 17.26]cm H2O)and maximum urethral closure pressure(MUCP([74.24 ±35.75]cm H2O vs[90.66 ±30.10]cm H2O)in SUI group were significantly lower than those in control group(P ＜0.05)Conclusion There were large groups of middle-aged female urinary incontinence in patients and the classification is more complex.It shows important guiding significance for diagnosis and selecting proper treatments by detecting urodynamic.

Objective To investigate the relationship between the serum ghrelin level and β-cell function after treatment of patients with newly diagnosed type 2 diabetes mellitus.Methods 34 patients with newly diagnosed type 2 diabetes mellitus were divided into three groups of pre-treatment(DM0),two weeks after treatment(DM1)and six months after treatment(DM2).Intravenous glucose tolerance tests(IVGTT)were performed and blood glucose,HbA1C,ghrelin,insulin were measured during the study.Insulin sensitivity was assessed by homeostasis model assessment(HOMA).Results(1)Compared with DM0 group,beta-cell function and the mean AUC of insulin were dramatically improved in groups of DM1 and DM2(all P<0.05).(2)Compared with DM1 and DM2,ghrelin levels and the mean AUC of ghrelin in DM0 groups were lower(all P<0.05).(3)Only positive correlation between ghrelin and HOMA-β(r=0.446,P<0.05),and negative correlations of ghrelin with glucose(r=-0.274,P<0.05),insulin(r=-0.35,P<0.05)and BMI(r=-0.276,P<0.05)were found after six months of treatment.Conclusions Ghrelin might play an important role in the pathogenesis and progress of type 2 diabetes mellitus.