Objective To investigate the pathological features of airway remodeling and evaluate interventional effects of nerve growth factor (NGF) on the expression of matrix metalloproteinase-9 (MMP-9), an important mediator of airway remodeling, in guinea pig asthma model. Methods Guinea pigs were randomly divided into the control group, asthma group, and antibody NGF intervention group (each group had 8 guinea pigs). In the asthma group the animals were sensitized by repeated exposure to aerosolized ovalbumin combined with Al(OH)_3. The thickness of the smooth muscle of intrapulmonary bronchi was measured by image analysis system. The expression of MMP-9 in bronchi and lung tissues were assayed with immunohistochemistry combined with the micro-image analysis system. The levels of MMP-9 mRNA in bronchi and lung tissues were determined by RT-PCR. Results After repeated allergen challenge, obvious infiltration of inflammatory cells and proliferation of goblet cells and smooth muscle were demonstrated in guinea pig bronchi. Expression levels of MMP-9 in the epithelial cells of bronchi were significantly higher in asthmatic animals than those of control group animals. Compared with asthmatic group, there was mild inflammation reaction, and decrease in collagen deposition and expression of MMP-9 in antibody NGF group animals, and they were not significantly higher than that in control group animals. Conclusions Repeated exposure of allergen induced airway inflammation and remodeling. MMP-9 plays an important role in airway remodeling. Antibody NGF intervention could inhibit airway remodeling through inhibition of the expression of MMP-9.

Objective To investigate the attentional bias for emotionally faces in subjects with low-trait anxiety when they are under normal or induce-fear emotion.Methods Trait anxiety inquiry(T-AI) were used to evaluate the mental health status of 480 freshman in a university,and 450 valid questionnaires were obtained.Among them,90 students were identified as low trait anxiety.Sixty students from them were randomized into 2 group(n=30) to receive a dot-probe task with emotional face as stimulus.They were asked to judge the target.The attentional bias under normal or fear-induced emotion to the emotionally faces was examined.Results Low trait anxious college students showed attentional avoidance to the negative faces when they were under normal emotion [D=(-11.09?25.40),t=-2.391,P=0.024],and the orientation was significant [OI=(-20.28?22.90),t=-4.850,P0.05].Conclusion Low trait anxious college students have attentional avoidance to negative faces because of orientation,but the avoidance will disappear when they are under fear emotion.

Objective This study aimed to investigate the protective effects of ademetionine 1,4-butanedisulfonate (SMT) against radiation injuries.Methods ICR mice were randomly divided into 7 groups,including normal control,irradiation-only,SMT administration-only,low-,medium-and high-dosages (250,500,1 000 mg·kg-1) of SMT pre-irradiation and high-dose of SMT post-irradiation in experimental groups.Blood and immunological experiments,organs index experiment and 30-day''s survival experiment were carried out to observe the protective effects of SMT on peripheral blood and immune system,organ index and the whole body injuries.Results Compared with irradiation-only group (4.23±1.16) ×109·L-1,the number of nucleated cells in bone marrow was (11.20±4.63) ×109·L-1 in the high dose of SMT pre-irradiation.The difference between two groups was significant.Compared with irradiation-only group (19.25±9.36),the colony forming unit-spleen was (39.00±7.57) in the high-dose SMT pre-irradiation group,there was a significant difference between the two groups.The index of liver,spleen,kidney and pancreas were significantly higher than those of the irradiation-only group in SMT administration groups.The survival rate of mice treated with SMT was increased,especially for the high dose group (46% lifted) when compared with irradiation-only group.Conclusion SMT can protect mice from radiation injuries.

BACKGROUND: Hyperbaric oxygen(HBO) is the first choice in the treatment of acute carbon monoxide(CO) poisoning. However,the mechanism of HBO in the treatment of CO poisoning,especially the mechanism in the treatmentof CO poisoning-induced delayed encephalopathy,is unclear at present.OBJECTIVE: To observe the pathological changes of hippocampal neurons in rats after acute CO poisoning to investigate the impacts of HBO therapy on Bcl-2 protein expression in hippocampal neurons in rats after CO poisoning.DESIGN: A completely randomized controlled experimental study based on the experimental animals.SETTING: Emergency department in a military medical university of Chinese PLA affiliated hospital,department of laboratory medicine in a municipal hospital,and the center of HBO therapy in a military medical university of Chinese PLA.MATERIALS: The study was conducted in the Laboratory of HBO Therapy Center,Faculty of Aerospace Medicine,the Fourth Military Medical University of Chinese PLA. Sixty male SD rats were selected.INTERVENTIONS: Sixty rats were randomly divided into 3 groups: normal control group(control group),CO poisoning group(CO group),and HBO therapy group(HBO group) with 20 rats each. Rats of each group were exposed under air or CO gas(volume fraction was 3.2 × 10-3) respectively for 60 minutes,and rats of CO-HBO group were treated by HBO. Cerebral pathological slices of hippocampus were prepared for routine HE and Bcl-2 staining to observe the characteristics of the changes of hippocampal neuronal injury and the Bcl-2protein expression on the 1st,3rd,5th and 7th day after CO poisoning.MAIN OUTCOME MEASURES: Changes of pathomorphology and Bcl-2protein expressionRESULTS: It could be seen lot of degenerated and necrotic neurons in hippocampus of rats in CO group. Degenerated and necrotic neurons decreased and the expression of Bcl-2 protein increased in CO-HBO group,especially on the 3rd and 5th day after poisoning( P ＜ 0. 05).CONCLUSION: HBO therapy can promote Bcl-2 protein expression in hippocampus after acute CO poisoning,so it can protect neurons.

[ ABSTRACT] AIM:To evaluate the effects of 1α, 25-dihydroxyvitamin D3 on T helper cell 17 ( Th17 cells) and its related cytokines in a mouse model of corneal allograft transplantation.METHODS:C57BL/6 mice were transplanted with corneal grafts from BALB/c mice and treated intraperitoneally with 1.0μg 1α, 25-dihydroxyvitamin D3 or soybean oil every other day after operation.The transparency of the corneal grafts was evaluated for potential rejection signs by slit lamp biomicroscopy and histopathology.The expression levels of IL-17, RORγt and IFN-γin the spleen were measured by real-time PCR.Moreover, the protein expression of RORγt and IL-17 in the peripheral blood was analyzed by Western blotting. IL-17 and IFN-γin peripheral blood were measured by flow cytometry.RESULTS:1α, 25-dihydroxyvitamin D3 signifi-cantly inhibited the rejection of the corneal allograft and reduced the numbers of inflammatory infiltrates in the corneal graft. In the spleen, 1α, 25-dihydroxyvitamin D3 treatment reduced the expression levels of IL-17, RORγt and IFN-γ.In the pe-ripheral blood, 1α, 25-dihydroxyvitamin D3 treatment downregulated the expression levels of RORγt, IL-17 and IFN-γ. CONCLUSION:The effects of 1α, 25-dihydroxyvitamin D3 on suppressing corneal transplantation-induced allograft rejec-tion in mice are closely associated with its modulation on IL-17 and related cytokine RORγt.

Objective To investigate the effect of health education on enhanced curative effect of motor imagination therapy of patients with hyperbaric oxygen(HBO). Methods Thirty patients undergoing HBO combined with motor imagination therapy were given health education including contents of motor imagination,time for motor imagination,intervention of bad emotions and time for motor imagination after leaving the treatment cabin.The understanding of motor imagination-associated knowledge after education was compared to that before education. Results The understanding of motor imagination-associated knowledge after education was significantly better than before education(χ2=9.017,P=0.003). Conclusion Health education may help improve the curative effect of hypterbaric oxygen treatment(HBO)by way of improving the understanding of motor imagination-related knowledge.

Objective To compare four methods of monitoring vascularization of tissue engineered bone in the rhesus so as to find our the best. Methods Twenty-five lower limbs of 13 rhesuses were used in this study to make models of tibial diaphyseal defect of 20mm which were to be fixed with an AO reconstruction plate of 7 holes. The monkeys were randomly divided into five groups according to defect filling materials: group A:?-tricalcium phosphate (?-TCP) and bone marrow stromal cells (BMSCs) and blood vessel bundles; group B:?-TCP and blood vessel bundles; group C:?-TCP and BMSCs; group D:?-TCP; group E: blank. Perfusion weighted MR imaging (PWMR), X-ray, radionuclide imaging and histological examinations were carried out at weeks 4, 8, 12 postop- eratively. The maximum slope rates of the single intensity-time curve (SS_(max)) and values of baseline (Sl_(?))were calculated at the same time points. Transmittances of the X-ray films were assessed. Ratios between isotope counts in region of interest (ROI) were calculated. Chinese ink perfusion and calculation of blood vessel areas were done for histological examinations, Results Compared with other groups, the SS_(max) in group A was the highest at weeks 4, 8, 12 postoperatively. In group A, the SS_(max) at week eight was significantly higher than that at week four (P= 0. 003), and the SS_(max) and transmittance of X-ray were negatively related at week 12 after operation (rs=-0. 892, P=0. 042), but the SS_(max) and blood vessel area were positively related (rs=0. 894, P=0.041)Conclusions PWMR can be a sensitive, quantitative, noninvasive and non-radiant method to monitor vascularization of tissue engineered bone, because SS_(max) of the single intensity-time curve of PWMR can reflect the most accurately the process of vascularization of tissue engineered bone.

Objective To review the publication of general practice education in China mainland in 20 years from 1993 to 2012.Methods The research articles of general practice education published between January 1,1993 and December 31,2012 were searched from CNKI and Wanfang databases, and analyzed with bibliometric and literature management software NoteExpress 2, Epidata 3.1 and SPSS 13.0.Results Total 4 281 articles were retrieved and 241 education relevant articles were selected.29.9％ (72/241) of the 241 articles were on on-campus education, 67.6％ (163/241) were on continuing medical education and 4.5％ (11/241) were on post-graduation education.As to the published institutions, 58.5％ (141/241) were from the medical colleges and research institutions, 25.7％ (62/241 were from the tertiary hospitals, 3.7％ (9/241) were from primary care institutions, 1.7％ (4/241 were from the secondary hospitals and 5.8％ (14/241) were from the government departments.The general practice education grants increased from 1 in 2001 to 46 in 2012;20 of which were supported by provincial and ministerial level funds.Conclusion The contents of general medical education literature in China is mainly on on-campus education and continuing medical education;most of which were from the tertiary hospitals and the medical colleges and research institutions.The amount of research grants of general practice education were increasing year by year during 1993-2012, indicating that more attention had been paid to general practice education in mainland China in the last two decades.

A method was developed for analyzing the stable carbon isotope ratio of five volatile components ( Ethanol, Glycerol, Acetic acid, Ethyl lactate, 2-methyl-butanol ) in wine using gas chromatography-combustion-isotope ratio mass spectrometer ( GC-C-IRMS ) . The sample injection volume was less than 0. 5 μL, and the analytical time of each run was less than 14 min. The precision of this method was 0. 08‰-0. 25‰ for analyzing standards, while 0. 09‰-0. 36‰ for wine samples. Compared to element analysis-isotope ratio mass spectrometry ( EA-IRMS) results, the deviations were lower than 0. 5‰. Fifty-four wine samples from France, Australia, America and China were considered. The δ13 C of five volatile components were measured using GC-C-IRMS. Discriminant analysis ( DA) was employed for analyzing the geographical origin traceability of selected wine. The result indicated that δ13 C of volatile components could be used to distinguish the origin of wines. The method was shown to be effective in improving detection of the origin traceability of wine.

Objective To study the etiological effect between the spatial variation of lumbar facet orientation and the degenerative lumbar spondylolisthesis(DLS)in axial,sagittal and coronal plane.Methods 85 patients with DLS at L4 and 110 controlsreceived X-ray and CT scanning.The facet angle at L4-L5 was measured in axial,sagittal and coronal plane.Results Compared with the control group, the DLS-angles were lesser and the difference between the left and right was greater in axial,coronal plane(P <0.05).But were greater in sagittal plane(P <0.05).Conclusion The DLS-angles are more sagittal in axial plane,more level in sagittal plane and more erect in coronal plane.The change of spatial orientation in the facet joint is one of etiological factors of degenerative lumbar spondylolisthesis.