To cultivate clinical graduate students with high quality is the mentor's duty.Focus should be directed on cultivating their comprehensive abilities,which include clinical practice and scientific research abilities,and the cultivation of which is the currently radical problems facing the graduate students education.Only when the clinical graduate students lay emphasis on cultivation of their clinical practice abilities and comprehensive abilities,can they meet the requirement for medical workers with high quality.

Interleukin-12 can induce the production of INF-?, up-regulate the inhibitive factor of angiogenesis such as IP-10, MIG, TIMP, TNF-?, down-regulate the induced factor of angiogenesis such as VEGF, bFGF, MMP, inhibit the angiogenesis of tumor together and accelerate the regression of tumor. Interleukin-12 can inhibit the angiogenesis of tumor, which is independent of the immune system.

Objective To form a concise and useful warning scale of suicide ideation of inpatients with somatic disease.Methods 2 677 inpatients who were more than 15 years old were randomly selected in a comprehensive hospital during the period of 2010.11-2013.02.Self-rating Depression Scale (SDS),Self-rating Anxiety Scale(SAS) and self-designed questionnaires which included general information,suicide risk factors and somatic disease were applied.Chi square test,partial correlation analysis,t test,correlation analysis and ROC curve analysis were used for statistical analysis.Results 1.The warning scale of suicide ideation which contained 18 items was formed.2.The Cronbach's Alpha reliability of the warning scale was 0.84 and its split-half reliability was 0.60.Criterion-related validity studies showed that the scores of the 18 items were positive correlated with SDS and SAS(r SDS =0.50,r SAS =0.54,P＜0.01).This scale also had good structure validity.3.The ROC curve concluded that the area under curve was 0.83,the sensitivity was 68.40％ and the specificity was 79.20％.Positive and negative predictive values were 21.22％ and 96.83％ respectively.Conclusion The reliability and validity of the warning scale entirely accorded with psychometric demands.It also has good specificity and negative predictive value,so it is suitable for clinical promotion.

0.05).②The average scores of psychological abuse sub-scale scold and threaten dimension of the male students were higher than those of the female ones(P

Thyroid hormone is an important hormone for regulating cell differentiation,growth and metabolism.Many studies have shown that thyroid hormone can induce turmor angiogenesis after binding with the integrin ανβ3 receptor at cell surface.Tetraiodothyroacetic acid is the analogue of thyroid hormone,and can inhibit tumor angiogenesis by inhibiting the binding of thyroid hormone with integrin ανβ3.Studying the role of thyroid hormone in promoting tumor angiogenesis may provide a new approach for molecular targeted therapy of tumor.

[Objective] To search a suitable preoperative intestinal cleansing method for the operation of colon and rectum. [Methods] A randomized controlled trial was applied in 70 cases before colic and rectal operations. Group A was give:n decoction of Folium Cassiae for oral use and saline enema and Group B was treated with saline enema only. The effect on intestinal cleansing was observed during the operation. [Results] In Group A, 26 cases were remarkably effective in intestinal cleansing, 8 effective, and 1 ineffective and 14, 16 and 5 in Group B respectively ( P

AIM: To study the expression of MDM2 and muta nt-type P53 proteins in primary hepatocellular carcinoma(HCC). METHODS: Using immunohistochemical staining method(SP),the expression of mutant-t ype P53 and MDM2 proteins was examined in 55 cases of HCC,23 cases of correspond ing paracancerous tissues and 10 cases of normal hepatic tissues. RESULT S: The frequencies of MDM2 and P53 positive expression in HCC were 17/55 (30 9%) and 23/55 (41 8%), respectively. There was both positive expression of MDM2 and mutant-type P53 in 11 cases (20%) with HCC. Expression of MDM2 showed a significantly positive correlation with expression of mutant-type P53 (r=0 310,P

AIM: To observe the influence of gold nanoparticles combined with Endostar (AuNPs-Endostar) on the melanoma lung metastasis of mice and the underlying mechanism.METHODS: C57BL/6 mice (n=24) were selected for constructing the model of spontaneous lung metastasis of melanoma B16-F10 cells.Subsequently, the mice were randomly divided into Endostar group, AuNPs group, AuNPs-Endostar group and model group.After the formation of melanoma, the mice in each group were injected with different drugs through tail vein for 0.1 mL daily.After 9 d, the mice were narcotized for cutting the tumors in situ.After the operation, they were raised for 2 weeks before killed for obtaining the lung tissues to observe the situation of the metastasis.HE staining was utilized for observing the necrosis status of the tumors in situ, while immunostaining was applied for testing the expression of CD31, carbonic anhydrase-IX (CA-IX), vimentin and zonula occludens-1 (ZO-1) in the tumors.RESULTS: Compared with model group, the pulmonary metastasis in the groups with medical treatment was obviously reduced.In AuNPs-Endostar group, the metastasis inhibition rate was the highest, and the tumor necrosis was also decreased obviously, with the significant reduction of CD31, CA-IX and vimentin expression in the tumors and significant increase in ZO-1 expression.CONCLUSION: Compared with using Endostar or AuNPs alone, the combination of AuNPs with Endostar significantly improves the curative effect of inhibiting the pulmonary metastasis of melanoma in the mice.The mechanism may be related to reducing the tumor angiogenesis, norma-lizing the blood vessels and improving tumor hypoxia, thus inhibiting the tumor epithelial-mesenchymal transition, increasing the tight junctions between tumor cells and decreasing the invasiveness.

AIM:To investigate whether gold nanoparticles (GNPs) reverses adriamycin (ADM), resistance of human hepatocellular carcinoma drug-resistant cell line HepG2/ADM and to explore the potential mechanism.METH-ODS:The sensitivities of HepG2 cells and HepG2/ADM cells to ADM were tested by MTT assay before and after GNPs pretreatment.The apoptotic rate was examined by flow cytometry.The concentration of ADM in HepG2/ADM or HepG2 cells was determined by ultraviolet-visible spectrophotometer .The content of glutathione ( GSH ) in HepG2/ADM or HepG2 cells by DTNB method.RESULTS:The half maximal inhibitory concentrations ( IC50 ) of ADM for HepG2/ADM cells were(29.46 ±1.73) mg/L and (15.18 ±0.85) mg/L before and after GNPs pretreatment,respectively.The IC50 of ADM for HepG2 cells was (9.16 ±2.03) mg/L before pretreatment.The apoptotic rate in GNPs+ADM group was higher than that in ADM group ( P<0.05 ) .The concentration of ADM in HepG2/ADM group was lower than that in HepG2 group (P<0.01).After GNPs pretreatment, the concentration of ADM in HepG2/ADM cells was higher than that before pretreatment.The content of GSH in HepG2/ADM group was higher than that in HepG2 group (P<0.01).After GNPs pretreatment, the content of GSH in the HepG2/ADM cells was lower than that before pretreatment.CONCLUSION:Gold nanoparticles can reverse ADM resistance of human hepatocellular carcinoma drug-resistant cell line HepG2/ADM,
reduce the content of GSH and increase the concentration of ADM in HepG2/ADM cells.

Objective To study the effect of cisplatin on the hepatocellular carcinoma HepG2 cells by Atomic Force Microscopy (AFM), then analysis the changes of ultrastructural in HepG2 cells during apoptosis induced by cisplatin at nanoscale level. Methods HepG2 cells were treated with cisplatin for 24h and 48h. The ultrastructural change of cell surface was detected by AFM , the inhibitory rate and apoptotic rate of cell were examined by MTT and fow cytometry. Results AFM images showed that with the prolongation of cisplatin-inducing, the deformation change of HepG2 cells varying degree. The cells appeared larger pore size of cell membrane, the value of cell membrane particle sizes, Rp-v, Ra, Rq and Meant Ht were significant increased. The inhibitory rate and apoptotic rate were significant increased. Conclusions Cisplatin induced shrinkage in cell morphology, pore formation and roughness increasing in cell membrane, thereby inducing apoptosis in HepG2 cells.