The enrollment of foreign medical students has expanded year after year.The education of foreign students becomes an important part of college education.In order to explore an effective method of medical education,the difference between Chinese students and foreign ones has been analyzed and the experience has been concluded according to the practice in teaching clinical diagnostics in recent years.

Objective To observe the effect of endothelin-1 (ET-1) on the cell growth, adhesion, migration and expression of intercellular adhesion molecule 1 (ICAM-1) by A375 human malignant melanoma cells. Methods A375 cells were cultured in the presence of ET-1 of various concentrations (0.002, 0.02, 0.2, 2 μg/mL) for different periods. MTT method and flow cytometry were applied to detect the proliferation and ICAM-1 expression of these cells, respectively, after 24-, 48-, and 72-hour treatment. After 24-hour treatment, the cell adhesion and migration of A375 cells were assessed with cell adhesion assay and Transwell chambers, respectively. Results In the case of ET-1 from 0.002 to 0.2 μg/mL, it enhanced the proliferation, adhesion, migration of A375 cells and inhibited the expression of ICAM-1 by A375 cells in a dose dependent manner (P<0.01 or<0.05); however, for ET-1 of 2 μg/mL, the situation was the opposite. Moreover, after 24-hour culture with ET-1 of 0.2 μg/mL, the metabolic activity, cell adhesion rate, and expression of ICAM-1 peaked at 0.327±0.009, (163.31±4.05)% and 4.667±0.551, respectively. Conclusion ET-1 may enhance cellular metabolism and pigmentation by suppressing the expression of ICAM-1 and promoting the proliferation, adhesion and migration of melanoma cells.

Objective To compare the advantages and disadvantages of two methods for rat overactive bladder(OAB)model construction in?duced by intraperitoneal injection and intravesical instillation cyclophosphamide. Methods A total of 30 female SD rats weighting 200?250 g were randomly categorized into three groups:intraperitoneal injection?induced OAB(Ip?OAB),intravesical instillation?induced group(Iv?OAB)and con?trol group. Ip?OAB rats was i.p. administrated cycbophosphe mide three times in dose of 75 mg/kg body weight,while Iv?OAB rats received intravesi?cal instillation three times in drug dose of 75 mg/kg body weight. Control group rats received no treatment. Maximum bladder capacity(MBC),maxi?mum voiding pressure(MVP),frequency of spontaneous contraction of each group were recorded. The incidence,the mortality and the pathology of the three groups were compared. Results MBC,MVP and frequency of spontaneous contraction between Ip?OAB group and Iv?OAB group had no statistically significant difference(P>0.05). Compared with the control group,MBC significantly increased(P<0.05),MVP significantly decreased (P<0.05),and frequency of spontaneous contraction significantly increased(P<0.05)in Ip?OAB and Iv?OAB rats. The modeling success rate and mortality were 100%and 80%in Ip?OAB group,and were 50%and 0%in Iv?OAB group,and pathological changes were found in the two groups. Conclusion The construction of experimental animal model of OAB in rat induced by intraperitoneal injection and intravesical instillation cyclo?phosphamide are both reliable methods. Ip?OAB rats exhibit high incidence and mortality rate,while Iv?OAB rats show low incidence and mortality rate.

mbus in IVC. Interventional treatment can prolong the survival time and promote the quality of life.

Objective To investigate the association between a few single nucleotide polymorphisms (SNPs)in Fc receptor like 3(FcRL3)and rheumatoid arthritis(RA)in Han nationality of Anhui patients.Methods One hundred and forty RA patients along with one hundred and eighty-seven healthy controls were included in the study.SNPs of FcRL3-1(rs0158440),FcRL3-2(rs2225828),FcRL3-3(rs7528684).FcRL34(rs11284799),FcRL3-5(rs945635),FcRL3-6(rs3761959),FcRL3-7(rs2210913),FcRL3-8(rs2282284)and FcRL3-9(rs2282283)in the FcRL3 gene were genotyped by MALDI-TOF technology.Haplotypes were estimated using PHASE v 2.1 software.Results The frequency of FcRL3-3-1 69C alleles in RA patients was significantly increased compared with healthy controls(X~2=7.348,P=0.007,OR=1.558,CI:1.130～2.150).The decreased compared with healthy controls.ConclusionFcRL3 may be associated with RA susceptibility in Anhui Han population.

Objective To analyze the causes of recurrent hemoptysis after interventional treatment and to provide the reference to improve the interventional radiology technique in dealing with the hemoptysis.Methods From Oct.2000 to Oct.2008,repeated interventional procedure was carried out in 22 patients with recurrent hemoptysis after initial interventional treatment.After the bronchial arterial angiography and collateral branch arterial angiography were performed,embolization of diseased arteries with gelatin sponge particle,PVA particle or microcoil was conducted.Results Of 22 patients,re-canalization of the bronchial arteries was seen in 4,blood supply from additional bronchial artery other than from the already embolized bronchial artery in 3,and blood supply from the collaterals in 15.Technical success of the second interventional treatment was achieved in all the 22 cases.Bleeding ceased immediately after the second interventional treatment and no recurrent hemoptysis occurred during the follow-up period of 3 months to 4 years.Conclusion Complete embolization of all arteries related to the hemoptysis together with actively dealing with the primary disease can effectively improve the successful rate of interventional treatment for the massive hemoptysis.

Objective Monocular deprivation(MD) and binocular deprivation(BD) were used to examine the experience\|dependent structural plasticity of astrocytes in the central visual brain regions of young rats. Methods Pups eyelids were monocularly or binocularly sutured on postnatal day 7(P7) and maintained until 80?d,while an unoperated light experienced group was used for comparisions(L).Immunohistochemical ABC method was employed to investigate the immunoreactive changes of astrocytic bodies and processes for glial fibrillary acidic protein(GFAP) in the central visual brain regions. Results The results showed that the amount of astrocytic bodies and processes in the brain was decreased both in MD and BD groups compared to L group.The amount of GFAP\|positive immunoreactivity in the optic chiasma,optic tract,and contralateral central visual brain regions (including suprachiasmatic nucleus,lateral geniculate nucleus,occipital visual cortex,optic nerve layer of the superior colliculus and pretectal area) was significantly decreased in MD group.GFAP\|positive structures presented complementary distribution in bilateral visual cortex.For bilateral brain regions mentioned above,the amount of GFAP\|positive structures basically disappeared in BD group.There was,however,an increase in the olfactory cortex of GFAP immunoreactive in MD and BD groups. Conclusion\ The data suggested that the structure of astrocytes might be influenced by visual experience during development.

The manner by which eukaryotic genomes are packaged into nuclei while maintaining crucial nuclear functions remains one of the fundamental mysteries in biology. Over the last ten years, we have witnessed rapid advances in both microscopic and nucleic acid-based approaches to map genome architecture, and the application of these approaches to the dissection of higher-order chromosomal structures has yielded much new information. It is becoming increasingly clear, for example, that interphase chromosomes form stable, multilevel hierarchical structures. Among them, self-associating domains like so-called topologically associating domains (TADs) appear to be building blocks for large-scale genomic organization. This review describes features of these broadly-defined hierarchical structures, insights into the mechanisms underlying their formation, our current understanding of how interactions in the nuclear space are linked to gene regulation, and important future directions for the field.

Objective To assess the feasibility of interventional techniques in the establishment of animal model of superior mesenteric vein-portal vein (SMV-PV) thrombosis. Methods Nine miniature pigs were involved in the study including one for preliminary experiment. After general anesthesia, a balloon catheter was placed in the main trunk of PV to block the portal flow and then thrombin or autologous blood clot was injected to the SMV. Venography was performed to confirm the thrombosis 30 minutes later. Changes in the imaging before and after the thrombosis were observed. Pigs died during the experiment were anatomized to analyze the causes, and pathological examination was performed when necessary. Results The model of SMV-PV thrombosis was successfully established in all the pigs. One pig died of diffuse intravascular coagulation 10 minutes after model establishment in the preliminary experiment. Two pigs died of hepatorrhexis and over dose of anesthetics respec-tively 3 hours after model establishment, and the rest 6 pigs were fed for 14 days. Conclusion Interventional techniques are effective in the establishment of SMV-PV thrombosis model.

Objective To investigate the features of white matter impairment and its relationship with cognition in patients with amnestic mild cognitive impairment (aMCI).Methods Eighty-three cases of aMCI and 85 normal aging volunteers were scanned with diffusion tensor imaging (DTI) using MR system.All subjects completed the neuropsychological battery.We analyzed the differences between two groups using tract-based spatial statistics and the association between regions in difference and cognition using correlation analysis.Results There were significant differences between aMCI and normal control in the neuropsychological battery including the Mini-Mental State Examination(26.2 ± 2.6 vs 28.3 ± 1.3,F =43.224,P =0.000),Mattis Dementia Rating Scale-2 (131.4 ± 6.9 vs 138.0 ± 3.5,F =62.308,P =0.000),Auditory Verbal Learning Test-delayed recall(2.4 ± 1.6 vs 7.5 ± 2.0,F =324.018,P =0.000),Boston Naming Test(8.7 ± 1.4 vs 9.2 ± 1.0,F =6.821,P =0.010),Rey-Osterrich Complex Figure Test (12.1 ± 7.3 vs 18.5 ± 6.1,F =40.674,P =0.000),Symbol Digit Modulation Test (30.0 ± 10.1 vs 38.6 ± 9.8,F =30.786,P =0.000),Trail-Making Test Part B ((256.8 ± 124.5) s vs (178.1 ± 59.0) s,F =27.601,P =0.000).Significantly higher diffusivity indexes and radial diffusivity were also found in aMCI subjects compared to healthy elders in the parahippocampal,superior longitudinal fasciculus,inferior longitudinal fasciculus,superior fronto-occipital fasciculus,inferior fronto-occipital fasciculus,unciform fasciculus,corticospinal tract,corpus callosum,cingulum,corona radiate.We also found that axial diffusivity was significantly increased in the parahippocampal,superior longitudinal fasciculus,inferior longitudinal fasciculus,superior fronto-occipital fasciculus,inferior fronto-occipital fasciculus,unciform fasciculus,corticospinal tract and corpus callosum,whereas fractional anisotropy changes were not observed in aMCI.Diffusivity indexes values in bilateral frontal lobe (left r =0.67 ; right r =0.70),left cingulum (r =0.63),parietal white matter (r =0.69) and radial diffusivity values in left parietal (r =0.68) were significantly related to Trail Making Test A among aMCI (all P ＜ 0.05).Conclusions In aMCI patients,there was a wide range of white matter damage,with no brain region-specific.Executive function deficit was related to the white matter impairment in bilateral frontal lobe,left cingulate and parietal lobe.The specificity and sensitivity of four DTI parameters fordetecting white matter lesions are variant.Trial registration Clinical Research Center of Jiangsu Province (BL2013025)