Objective To compare the speech recognition by severe - to - profound hearing - impaired children using digital hearing aids and microlink FM system.Methods Hearing - impaired children were given respectively bilateral 100% omnidirection digital hearing aids, bilateral 100% omnidirection digital hearing aids and lateral FM system, bilateral 100% omnidirection digital hearing aids and bilateral FM system in noise and quiet environment. Speech recognition of these children was tested using different intensity.Results There was significant difference between children using microlink FM system and none FM system ( P

Objective: To investagate the antioxidative action of aloe and its dose-effect relationship. Methods:Sprague-Dawley rats were killed and then the livers were removed to isolate the microsome which can generate the reactive oxygen species in the presence of VC and Fe2+ or cumene hydroperoxite(CHP). In these peroxidative damage models, different dosages of aloe extract were added. Then the contents of malondialdehyde (MDA) were examined for analyzing the antioxidative action of aloe extract. Results:In CHP model, the content of MDA in those groups with different dosages of aloe extract decreased significantly (P

Objective:To construct recombinant adenovirus vector Ad5-CCL20,and detect the expression of CCL20 after Ad5-CCL20 transfected colon cancer cells CT-26.Methods:Genes encoding CCL20 was obtained from original plasmid double-digested with EcoR I/Sal I enzymes.The CCL20 DNA segments were linked into pDC316 to recombine shuttle plasmid pDC316-CCL20.After genome sequencing,we take shuttle plasmid pDC316-CCL20 and plasmid backbone pBHGIox_E1,3Cre co-transfecting 293T cells in mediation of liposome.The constructed recombinant adenovirus vector was named Ad5-CCL20.Lastly,after Ad5-CCL20 transfected CT-26 cells in vitro,the expression of CCL20 at different time points (12h,24h,36h and48h)was detected by Western blot and Elisa.Then,Culture supernatant was added into iDC and mDC to evaluate the chemotactic activity of CCL20.Results:The recombinant adenovirus Ad5-CCL20 were successfully constructed.The expression of CCL20 was detected by Western blot and Elisa.The level of CCL20 expression was increased with prolonged incubation of the infected CT-26 cells.Chemotaxis experiments show that the chemokine CCL20 had chemotactic activity to the iDC and mDC,but more obviouly for iDC (P＜0.05).Conclusion:The construction and obtain of recombinant adenovirus vector Ad5-CCL20 provide a new method for developing tumor immunotherapy.

with flutamide has a syn-ergistic action in inhibiting the proliferation of LNCaP.

Objective:To investigate the expression of VEGF-C in human lung carcinoma cell A549 induced by hyaluronan(HA) in vitro. Methods:A549 cells cultured in vitro were divided into three groups: control group(C): cultured with free serum medium(FSM);HA treatment group 1(HA1) and group 2(HA2): cultured with FSM containing different concentration of HA(HA1 group: 10?g/ml,HA2 group: 20?g/ml).After 48 hours,VEGF-C expression were examined by reverse transcription-polymerase chain reaction(RT-PCR)? Western blot and immunofluorescence staining. Results:Group C: both VEGF-C mRNA and protein expression were weak positive.HA1 and HA2 groups: both VEGF-C mRNA and protein expression were strong positive and increased significantly in a HA dose-depended way(P

Objective To investigate the neuroprotective effect of vagus nerve stimulation ( VNS) on a model rat of focal cerebral ischemia. Methods A total of 42 adult male Sprague-Dawle ( SD) rats were randomly divided into a sham operation group (n=10),a model group (n=16),and a VNS-treated group ( n = 16 ) . Each group was randomly redivided into 2 subgroups:left VNS subgroup and right VNS subgroup. A model of focal cerebral ischemia (2 h) in rats was induced by the intraluminal suture method. At 30 minutes after modeling, the VNS-treated group received cervical VNS, the stimulation intensity was 0. 5 mA,the interval was 0. 5 ms,and the frequency was 20 Hz. Stimulation was once every 5 min within 1 h and each lasted for 30 s. The model group did not give any stimulation. Neither blood vessels were embolized nor were the nerves stimulated in the sham operation group. The changes of somatosensory evoked potentials ( SEP) on the lesion sides during operation were monitored. At 24 h after modeling,the neurobehavioral scores were performed. The rats were sacrificed,and their brain infarct volume was measured. Results (1) During the stimulation of left VNS in rats,the neurobehavioral scores of the sham operation group,model group and VNS-treated group were 0. 4 ± 0. 2,9. 5 ± 0. 4,6. 4 ± 0. 3,respectively;during the stimulation of right VNS in rats,the neurobehavioral scores of the 3 groups were 0. 6 ± 0. 2,9. 3 ± 0. 4,and 6. 9 ± 0. 4,respectively. There were significant differences between the scores of the model group and those of the other 2 groups (P<0. 05). (2) Compared with the model group,the brain infarct volume of the VNS-treated group was reduced ( stimulating the left VNS of the 2 groups was 120 ± 7 and 56 ± 7 mm3 respectively;stimulating the right VNS was 115 ± 10 and 54 ± 8 mm3 respectively ) . There were significant differences ( P <0. 05). (3) Compared with the sham operation group and the VNS-treated group,the SEP N1 amplitude of the model group was decreased significantly and the P1 latency was prolonged significantly. There was significant difference (P<0. 05). (4) There were no significant differences in the stimulation of the left or right VNS in the VNS-treated group among the infarct volume, neurobehavioral scores, SEP amplitude,and latency (P>0. 05). Conclusion No matter whether to stimulate the left or right vagus nerves, they both have neuroprotective effects on ischemic brain injury, and there was no significant difference on the action effects.

ObjectiveTo study the clinical effect of the proximal femoral anatomical locking plate in the treatment of ipsilateral femoral shaft and neck fractures.Methods A retrospective study was done on 10 patients with ipsilateral femoral shaft and neck fractures treated with proximal femoral anatomical locking plate in our hospital from February 2009 to February 2011.After treatment,the outcome was assessed regularly by fracture union as was seen on serial radiographs and clinical function was estimated by Friedman and Vyman System.ResultsAll patients were followed up for 6-24 months ( average 16 months).All the fractures were healed within 2.5-4 months (average 3 months) in the femoral shaft and within 4-9 months (average 6 months) in the neck,respectively.According to Friedman and Vyman System,the overall clinical result was good in eight patients and fair in two,with excellent rate of 80％ (8/10).No osteonecrosis of the femoral head and fixation failure were observed during the followup. Conclusion Proximal femoral anatomical locking plate internal fixation is an effective treatment method for ipsilateral femoral shaft and neck fractures.

Objectives To investigate the neuroprotective mechanism of vagus nerve stimulation ( VNS) by stimulating the vagus nerve in ischemic cerebral tissue in a rat model of transient focal cerebral ischemia. Methods Twenty-six adult male Sprague-Dawley ( SD ) rats were randomly divided into sham operation group (n=6),model group (n=10),and VNS-treated group (n=10) . The model of rat transient focal cerebral ischemia was induced by the intraluminal suture method. At 30 min after modeling,the right side neck VNS in the VNS-treated group was stimulated ( stimulus intensity 0. 5 mA, interval 0. 5 ms, frequency 20 Hz),once every 5 min within 1 h,and once for 30 s. The model group repeated the steps of the VNS-treated group,but did not stimulate. The sham operation group repeated the experimental steps,but it neither embolized the vessels nor stimulated nerves. The changes of cerebral blood flow were monitored with a laser Doppler flowmeter. The rats were sacrificed after 24 h. The expressions of interleukin 6(IL-6) and caspase-3 in brain tissue were determined by immunohistochemistry staining. The neuronal apoptosis was observed by the in situ end-labelling technique. Results ( 1 ) Compared with the sham operation group, the number of positive cells of IL-6,caspase-3,and the numbers of neuronal apoptosis in the model group were significantly increased (20. 7 ± 5. 0 cells/HP vs. 2. 3 ± 1. 0 cells/HP,44. 5 ± 9. 5 cells/HP vs. 0,30. 9 ± 9. 0 cells/HP vs.0).Thereweresignificantdifferences(P<0.05).(2)Comparedwiththemodelgroup,thenumber of positive cells of IL-6(10. 9 ± 3. 7 cells/HP),the caspase-3 (18. 9 ± 6. 7 cells/HP),and the numbers of neuronal apoptosis (14. 0 ± 5. 2 cells/HP) in the VNS-treated group decreased significantly. There were significant differences (P<0. 01). (3) Before and after modeling,there were no significant differences in cerebral blood flow in various periods between the model group and the VNS-treated group (P>0. 05). Conclusion The neuroprotective mechanism of VNS for cerebral ischemia may be associated with the inhibition of neuronal apoptosis and decreasing inflammatory response. It may not be associated with the changes of cortical cerebral blood flow.

In this paper,the educational mode of master of public health (MPH) in America and China were reviewed through literatures searching and internet searching and the difference between America and China were compared from the sources of students,students' characters,educational objective,specialties and curricula,methods of teaching and management.There is still a certain gap in education of MPH in China.The educational mode needs optimizing with changing enrollment methods,definitude training objectives,perfect curriculum setting,increased opportunities for practice and strict quality control,so that the educational mode of MPH will be perfected in China.

Objective To investigate the correlation between genetic polymorphisms of glutathione S-transferases (GSTs) and ulcerative colitis (UC) in Hubei Han population. Methods Genetic polymorphisms of GSTM1 and GSTT1 of 270 patients with UC (UC group) who were admitted to the Zhongnan Hospital, People's Hospital of Wuhan University, Tongji Hospital and Union Hospital of Huazhong University of Science and Technology from August 2002 to December 2009 and 623 healthy people ( control group) were detected by restriction fragment length polymorphism-polymerase chain reaction. All UC patients were allocated to distal UC group (n= 229) and extensive UC group (n =41 ) according to the location of the lesions; and all UC patients were also allocated to mild-moderate group (n = 237) and severe group (n = 33 ). The genetic polymorphisms of GSTP1 of these patients and healthy people were detected by polymerase chain reaction. The genotypes of GSTM1, GSTT1 and GSTP1 were also detected. GSTM1 and GSTT1 containing small DNA segments ( 157 bp and 480 bp) were defined as GSTM1 (+) and GSTT1 (+), otherwise, GSTM(-) and GSTT1 (-), respectively. All data were analyzed by chisquare test. Results The frequencies of GSTM1(-), GSTT1(-) and GSTP1 (Val/Val) were 70.7% (191/270),64.8% (175/270) and 48.9% (132/270) in the UC group, and 41.7% (260/623), 47.2% ( 294/623 ) and 34.3% (214/623) in the control group, with a significant difference between the two groups (x2 = 63. 404,22. 320, 25. 384, P ＜0.05 ). The frequencies of GSTT1 (-) and GSTP1 (Val/Val) were 71.6% (164/229) and 57.6% (132/229) in the distal UC group, which were significantly higher than 31.7% (13/41) and 29.3%( 12/41 ) in the extensive UC group ( x2 = 24.528, 9.609, P ＜ 0.05 ). The frequencies of GSTM1 (-) were 65.1%(149/229) in the distal UC group and 56.1% (23/41) in the extensive UC group, with no significant difference between the two groups ( x2 = 1. 210, P ＞ 0.05 ). The frequencies of GSTT1 (-) and GSTP1 ( Val/Val ) were 71.6%(164/229), 31.7% ( 13/41 ) in the distal UC group and 57.6% ( 132/229), 29.3% ( 12/41 ) in the extensive UC group, with a significant difference between the two groups ( x2 = 24. 528, 9. 609, P ＜ 0. 05 ). There was no significant difference in the frequencies of GSTM1 (-), GSTT1 (-), GSTP1 (Val/Val) in the mild-moderate group and the severe group( x2 = 0. 623, 1. 884, 3. 403, P ＞ 0. 05 ). Conclusions Variant genotypes of GSTs are significantly correlated with UC in Hubei Han population. The severity of UC may not be correlated with variant genotypes of GSTs.