Objective To investigate the intervention effect of lentivirus expressing human IL-10 (LV-hIL-10) on activated astrocytes.Methods DI TNC1 cell line was treated with different concentrations of lipopolysaccharide (LPS) and time points.The expression of proinflammatory cytokines tumor necrosis factor-α (TNF-α) and interleukinb-1β (IL-1β) was detected by RT-PCR and ELISA.Moreover,the effect on the expression of proinflammatory cytokines TNF-α and IL-1β was analyzed in DI TNC1 cell lines infected with and without LV-hIL-10.Results The expression of TNF-α and IL-1β was increased in DI TNC1 induced by LPS.The expression of IL-10 was upregulated in DI TNC1 infected with LV-hIL-10.TNF-α and IL-1β were inhibited by IL-10 overexpression in DI TNC1 actived by LPS.Conclusion DI TNC1 is activated by LPS and secretes proinflammatory cytokines TNF-α and IL-1β as immune-like cells,and these activation is inhibited by hIL-10 overexpression.

Objective:To screen the best base for gastrodin nasal in situ gel ( ISG) to lay foundation for the development of gastrodin new preparation .Methods:Two bases were chosen , one was the combination of N-trimethyl chitosan ( TMC) , polyethylene glycol 4000 (PEG4000) and glycerophosphate (GP), and another was the combination of TMC, poloxamer 407 (P407), poloxamer 188 (P188) and carbomer.With the nasal cavity temperature of 35℃as the test temperature, the gelling time of the two bases was determined to screen the optimal ratio.Furthermore, gastrodin was added into the two bases , and the gelling time was determined to choose the suitable base for the drug.Results:The base of TMC-PEG4000-GP couldn’t gel in the nasal cavity temperature when combined with gastrodin , while the base of TMC-P407-P188-carbomer could gel quickly when combined with gastrodin .Conclusion:TMC-P407-P188-carbomer can be used as the base for gastrodin nasal in situ gel .

Objective:To study the pharmacokinetic parameters of gastrodin nasal in situ gel ( ISG) with the base of TMC-P407-P188-carbomer, and evaluate its brain-targeting ability preliminarily. Methods:Rats were used as the model animals. The experiment group was treated with gastrodin nasal in situ gel, and the control group was treated with gastrodin solution with intravenous administra-tion. The plasma sample and brain tissue ( cerebrum and cerebellum) were taken out at the predetermined time points, and the concen-tration of gastrodin in plasma and gastrodigenin in brain tissues were determined by HPLC to draw the curve of concentration vs time. The pharmacokinetic parameters such as MRT and AUC were calculated by 3P97 software. The bioavailability F (%) and the brain-targeting index BTI were compared between the groups. Results:The concentration of gastrodigenin in the brain tissues of grastrodin in situ gel was higher than that of gastrodin solution with intravenous administration (P<0. 05). AUC of cerebrum and cerebellum both increased significantly with BTI of 2. 38 and 1. 93, respectively. MRT increased by nearly two-fold in the gel group when compared with that in the control group, and F(%) increased significantly in cerebrum and cerebellum as well. Conclusion:Gastrodin nasal in situ gel with the base of TMC-P407-P188-carbomer has promising effectiveness. Meanwhile, it can improve the brain-targeting ability of gastrodin with sustained release.

Actinin ; genetics ; Adolescent ; Adult ; Asian Continental Ancestry Group ; genetics ; Athletes ; Athletic Performance ; China ; Ethnic Groups ; genetics ; Female ; Humans ; Male ; Polymorphism, Genetic ; Young Adult

Brain-computer interface (BCI) system is a system that achieves communication and control among humans and computers and other electronic equipment with the electroencephalogram (EEG) signals. This paper describes the working theory of the wireless smart home system based on the BCI technology. We started to get the steady-state visual evoked potential (SSVEP) using the single chip microcomputer and the visual stimulation which composed by LED lamp to stimulate human eyes. Then, through building the power spectral transformation on the LabVIEW platform, we processed timely those EEG signals under different frequency stimulation so as to transfer them to different instructions. Those instructions could be received by the wireless transceiver equipment to control the household appliances and to achieve the intelligent control towards the specified devices. The experimental results showed that the correct rate for the 10 subjects reached 100%, and the control time of average single device was 4 seconds, thus this design could totally achieve the original purpose of smart home system.
Brain-Computer Interfaces ; Electroencephalography ; Evoked Potentials, Visual ; Humans ; Microcomputers ; Wireless Technology

AIM: To analyze the effect of human amniotic homogenate extract on corneal neovascularization after corneal alkali burn in the process of pigment epithelium derived factor (PEDF) and vascular endothelial growth factor (VEGF) expression and the effect of corneal neovascularization.METHODS: Totally 32 patients with corneal alkali burn were selected from June 2015 to June 2016 in Foshan,and were randomly divided into Group A and Group B,with a total of 37 eyes.Group A of 17 cases,with a total of 19 eyes,were treated with 40mg/L human amniotic homogenate extract;Group B (n=15),and 18 eyes,treated with 3g/L prednisolone eye drops.In the treatment of 1,4,7,14,21 and 28d at different time points,we observed the growth of corneal neovascularization,and detected the expression of PEDF and VEGF during angiogenesis.RESULTS: Group A of patients in the use of human amniotic homogenate extract after the treatment,the expression level of PEDF was significantly higher than that in Group B(P=0.001),after 28d treatment,the expression level of PEDF reached 0.721±0.314.While patients in Group B the expression level of PEDF was only 0.538±0.253.Two groups had significant difference between the expression level of PEDF (P<0.05).The expression level of VEGF in Group A was lower than in Group B at different time points in the test.After the treatment of 28d patients in the Group A,the expression level of VEGF was 0.152±0.020,in Group B the expression level of VEGF was0.302±0.031.Two groups of patients with VEGF expression level between the differences were statistically significant (P<0.05).The patients number in Group A with corneal neovascularization was significantly lower than that in Group B,the difference was statistically significant (P<0.05).CONCLUSION: Human amniotic homogenate extract can increase the expression of PEDF in corneal neovascularization after corneal alkali burn,inhibit the expression of VEGF and the proliferation of corneal neovascularization.

Objective To unveil the current situation and bends of Keshan disease in Pingliang city of Gansu province, to evaluate the outcome of related prevention and control measures, and to provide scientific basis for further prevention and treatment of the disease. Methods According to the "the central allowance local public health special funds endemic disease prevention programs grams mountain monitoring programme" and "the diagnostic criteria for Keshan disease" (GB 17021-1997), between 2007 and 2009, local residents from nine monitoring points in Pingliang city of Gansu province were clinically examined, and electrocardiography(ECG) tracings and Xray were taken of suspected cases. Corn, wheat samples and hair samples of children, adults and women were collected, and selenium content of these samples was determined by 2.3-2-amino-naphthalene fluorescence method. Results A total of 5846 residents were surveyed in 3 years, 247 cases of Keshan patients were detected, with a detection rate of 4.23%(247/5846), of which potential cases of Keshan disease 214, the detection rate was 3.66% (214/5846); chronic Keshan disease 33 cases, the detection rate was 0.56% (33/5846); no acute type and subacute Keshan disease detected. A total of 764 abnormal ECG cases were detected, and abnormal detection rate was 13.07%(764/5846). Two hundred and seven cases of suspected patients were examined by chest X-ray, 80 cardiac enlargement cases were detected, the detection rate was 38.6% (80/207). The 262 hair samples of children, adults and women were analyzed, hair selenium was (0.279 ± 0.098)mg/kg. Of the 9 corn and 31 wheat samples collected, corn selenium was (0.0079 ± 0.0029)mg/kg; wheat selenium was (0.0104 ± 0.0078)mg/kg. Conclusions Overall Keshan disease is in a stable and subsided trend in Pingliang city of Gansu province, but there are still a number of potential chronic types, sporadic new cases, suggesting that the disease monitoring, comprehensive prevention and treatment of the patients are the focus.

In the reform of medical microbiology education on medical students of 8-year-education pro-gram, we compared the traditional teaching methods with Problem Based Learning (PBL) method. Through our practice, we have found that the combination of traditional lecture-based learning and PBL seems to better match the students’ way of learning. The lack of basic knowledge of the students hindered their learn-ing effect during the bilateral discussion in the PBL education. We also found that the application of PBL in medical microbiology education is an iterative process and should be promoted step by step. The theoretical level and the innovative ideas of the teachers play a crucial role in the dynamic process of education reform.

Objective To evaluate the methods for the prevention of internal jugular vein malposition of peripherally inserted central catheter (PICC) in patient with limited neck motion.Methods 210 patients who underwent PICC placement using ultrasound-guided modified Seldinger technique were divided into observation group (n =106) and control group (n =104) with a random number table.Ultrasound probe compression on the internal jugular vein was used in the observation group,while finger compression was used in the control group.The 2 groups were compared in terms of incidence of internal jugular vein malposition,accuracy of PICC tip position in X-ray,and incidence of complications.Results Incidence of PICC malposition was significantly lower in the observation group than the control group [3 (2.8％) vs.36 (34.6％),P =0.000].The accuracy of PICC tip position in both groups was 100％.No complication was observed in the observation group,while the rate of complication in the control group was 4.8％,with a statistically significant difference (P =0.022).Conclusion The ultrasound probe compression method can significantly lower the incidence of internal jugular vein malposition of PICC and is safer than the finger compression method.

Objective To investigate the influence of ursolic acid on vascular endothelial growth factor ( VEGF) , cycloxygen-ase-2 (COX-2), and matrix metalloproteinases-2 (MMP-2) expressed in the mouse retinal ischemic model , and to explore the mecha-nisms of anti-angiogenesis.Methods Sixty 7-day clean-class C57BL/6J mice were divided randomly into 6 groups [ n =10 mice (20 eyes) per group]:blank control, model control (PBS), positive control (triamcinolone), and ursolic acid (UA) intervention (low-dose, medium-dose, and high-dose).Mice in the blank control group were raised in air , and mice in other groups in(75%±2%)O2 high-oxygen environment for 5 consecutive days .Mice in the model control group and breastfeeding mice were put back in air environ-ment (21%O2 ) on the 12th day after the new-born mice to induce the generation of retinal neovascularization .When models were suc-cessful, the drug treatments were applied immediately to the corresponding groups , with injection of 3μl of sterile PBS in model control group, 3 μl of 1.5, 3.00 and 6.0 μg UA in UA intervention group, and 3 μl of triamcinolone (1 ml∶40 mg) in positive control group, respectively.All mice were killed after overdose anesthesia on the 17th day.Their eyeballs were made into samples and retinal tissue pathological sections with H-E dying method.The positive expressions of VEGF , COX-2, and MMP-2 were detected with immu-nohistochemical method .The fresh retinal tissue homogenate was prepared to detect the protein expressions of VEGF , COX-2, and MMP-2 in retinal tissue with western blot method ,and mRNA expressions of VEGF , COX-2, and MMP-2 were detected with real-time fluorescent quantitative polymerase chain reaction ( RT-PCR) .Results According to protein and mRNA expressions of VEGF , COX-2,and MMP-2 in retinal tissue among six groups , protein expressions of VEGF , COX-2, and MMP-2 in model group were significantly higher than those in blank group ( P <0.05 ) .Each protein expression in the high UA intervention group was significantly lower than that in the model group ( P <0.05 ) .Each protein expression in the high UA intervention group was not significantly different from that in the positive group ( P >0.05 ) .Each protein expression in the high UA intervention group was significantly lower than that in the low UA intervention group( P <0.05).Conclusions UA inhibited expressions of VEGF, COX-2, and MMP-2 in retinal ischemia model .UA also played an inhibitory role in the formation of neovascularization , and this role was positively correlated with UA dose .