Objective To observe the expressions of c-Ski in renal tissue of diabetic nephropathy rats, and discuss its significance. Methods Wistar male rats were randomly assigned to 3 groups: Control group, diabetic group and treatment group. Rats were killed at the 16th week after experiment. Histopathologic changes,in renal tissue were observed and immunohistochemistry was performed to investigate the expression of TGF-β1, α-SMA and c-Ski. Results The expression of c-Ski had a negative correlation with TGF-β1 and α-SMA. Compared to diabetic group, the expression of c-Ski was significantly increased in treatment group. Conclusion c-Ski may be a protective factor of tu-bular epithelial-myofibroblast transformation.

In order to solve some problems which we are confronted with in new period during the course of practical teaching in surgery,we carried out some teaching reforms and explorations,such as stimulating study interests,reforming teaching process,strengthening practical ability,persisting after-school training and so on,which have got good results and laid a firm foundation for cultivating medical talents with practical competence.

Objective To investigate the possible regulating effect of integrin-linked kinase (ILK) towards matrix metalloproteinase-9/tissue inhibitor of metalloproteinase-1 (MMP-9/TIMP-1) ratio in the process of transforming growth factor-β1 (TGF-β1)-induced epithelial-mesenchymal transition (EMT) in human kidney proximal tubular epithelial (HK-2) cells.Methods HK-2 cells were cultured and stimulated with 10 ng/ml TGF-β1.Specific ILK-small interfering RNA (ILK-siRNA) was used to inhibit ILK expression.The characteristic epithelial marker (E-cadherin) and mesenchymal marker (α-SMA) of EMT were examined by Real-time reverse transcription polymerase chain reaction (real-time RT-PCR) and Western blot.The expressions of ILK,MMP-9,and TIMP-1 were also examined,to determine the regulating effect of ILK towards MMP-9/TIMP-1 ratio.Results In the HK-2 cells cultured with TGF-β1,the expression of E-cadherin decreased,and α-SMA expression increased;overexpression of ILK and an abnormal changing of MMP-9/TIMP-1 ratio were observed.ILK inhibition by ILK-siRNA could adjust MMP-9/TIMP-1 ratio to near normal.Meanwhile,the overexpressed ILK and α-SMA were decreased.Conclusions Our data indicates that ILK-siRNA successfully inhibits ILK expression,which regulates the MMP-9/TIMP-1 ratio in HK-2 cells.The inhibition of ILK expression suppresses TGF-β1-induced EMT partially.

Objective: To explore the values for rejection research of the models through observing rejection rulers following small bowel transplantation(SBT)in Inbred strain rats.Mothods: Heterotopic SBT models were established with Inbred strain F344/RT11 and BN/RT1n by microsurgical technique according to Monchik method,including Isotransplantation(F344→F344,n=8)and allotransplantation(BN→F344, n=8).Results: 1.The mean living time was over 30 days in IT x group ,which was 12 days in AT x group.2.The general conditions have no significant difference on various time points of postoperative day(POD)in IT x group,while pathological features of grafts were concided with diagnosis of nonspecific slight inflammation on POD3 and were the same as the normal grafts on POD 0?5?7 and 9.3.Significant difference of IL-2R? chain and ?-INF mRNA transcription was earlier than pathological feature appearance of rejection.4.The general conditions and pathological features of grafts were concided with diagnosis of mild,moderate and severe actute rejection in AT x group on POD 5?7and 9 respectively.Conclusion:Inbred strain BN to F344 combination is fitter for research on rejection mechanism than F344 to Wistar combination and Outbred strain Wistar to SD combination.

Objective This study aims to understand the characteristics of the time sequence of ICR mouse first mandibular molar tooth germ development through dynamic observation.Methods Tooth germ of Embryos (E11.5,E12.5,E13.5,E14.5,E15.5,E16.5,E17.5 and E18.5) and postnatal (PN1,PN2) mice were obtained.The heads (E11.5-E15.5) and mandibles (E16.5-PN2) of mice were dissected,fixed and embedded for serial sections and HE staining.All the results were assessed under light microscopy.Results The tooth germ underwent various development stages including the bud,cap and bell stages.Mouse odontogenesis was initiated at E11.5.Proliferation of oral epithelium formed the bud stage at E13.5.Then the cap stage was observed at E14.5-E15.5 and the bell stage was appeared beginning from E16.5.The pre-dentin was observed at PN1,as well as the dentin at PN2.Conclusions Establishing the regular development pattern of the first mandibular molar of ICR mice will provide a reliable basis for the future use in the specific tooth germ developmental research.

Objective A new type adsorbent for removal of bacterial ET was prepared by immobilizing L-serine covalently onto polyvinylidene difluoride membrane (PVDF-Ser) to study the effect of hemoperfusion on sepsis induced lung injuries in a pig model. Method Endotoxemia were induced in thirteen pigs by injecting endotoxin (1 μg/(kg·h) ) intravenously for 2 h. One hour later, the pigs were treated with absorber of PVDF-Ser volumn (group hemoperfusion) or empty adsorber (group control) for 2 h. Extravascular lung water indexed to body weight and alveolar capillary permeability, levels of serum endotoxin, tumor necrosis factor-α, interleukin-6, malondialdehyde, glutathione, myeloperoxidase activity, and lung histological changes and myeloperoxidase immunohistochemical analysis were measured. Results Hemoperfusion treatment with PVDF-Ser volumn significantly improved extravascular lung water, pulmonary alveolar capillary permeability and lung injuries ( P ＜ 0. 05). In addition, hemoperfusion attenuated both serum and pulmonary cytokines, and decreased lung malondialdehyde and myeloperoxidase levels ( P ＜ 0. 05). Conclusions Hemoperfusion with the adsorber of PVDF-Ser volumn effectively reduced inflammatory responses and improved lung injuries and oxidative stress in endotoxemia. It has a high potential of clinical application for treatment of patients with severe sepsis.

The effects of cigarette smoke extract (CSE) on the expression of heat stress protein 70 (Hsp70) in human bronchi smooth muscle cells were investigated in vitro, and the changes in Hsp70 mRNA in the patients with chronic obstructive pulmonary disease and their significance were explored. Human bronchi smooth muscle cells were cultured with CSE at the different concentrations. The expression of Hsp70 mRNA and Hsp70 was detected by reverse translation-polymerase chain reaction (RT-PCR) and Western blotting respectively. Levels of Hsp70 mRNA and Hsp70 in lymphocytes from 20 patients with COPD and 20 healthy smoking control subjects were measured by RT-PCR and Western blotting. The results showed the expression of both Hsp70 mRNA and Hsp70 was decreased conformably in human bronchi smooth muscle cells treated with CSE at certain concentration in vitro. The A values of the Hsp70 mRNA expression were 0.24 +/- 0.11 and 0. 42 +/- 0.13 respectively in COPD patients and healthy smoking controls with the difference being significant (P < 0.01). There was also significant difference in the A values of the Hsp70 expression between COPD patients and healthy smoking controls (20.9 +/- 9.9 vs 44.8 +/- 15.3, P < 0.01). The levels of Hsp70 mRNA had strongly positive correlation with Hsp70 protein (r = 0.85, P < 0.01). It was suggested that the expression of Hsp70 mRNA was in concordance with the expression of Hsp70, which could provide a basis on the study of Hsp70 gene regulation and Hsp70 gene in the development of COPD.
Bronchi/metabolism ; Bronchi/pathology ; Cells, Cultured ; HSP70 Heat-Shock Proteins/*biosynthesis ; HSP70 Heat-Shock Proteins/genetics ; Muscle, Smooth/cytology ; Pulmonary Disease, Chronic Obstructive/*metabolism ; RNA, Messenger/biosynthesis ; RNA, Messenger/genetics ; Smoking

Objective To evaluate efficacy,feasibility and safety of the self-made percutaneous catheterized thrombectomy divice in animal model for thrombus removal. Methods Seven dogs were selected,with acute massive pulmonary embolism animal models created by injecting thrombi into the pulmonary arterial trunk via percutaneous femoral vein approach. After half an hours the catheter sheath was inserted into the occluded pulmonary artery through right femoral vein in 5 dogs,left femoral vein in 1 dog and right internal jugular vein in another one. The procedure began to remove the thrombi with simultaneous recording the thrombectomy time and the blood volume drainage. Blood gass was tested before and after embolization together with those of thrombi removement,continuously monitored pulmonary arterial pressure and intermittently performed angiography. The mean time form vascular recanalization to euthanasia was 2 hours,and then the lung specimens were resected for histological examination. Results One animal died of pulmonary arterial penetration during thrombi removal,but others were all alive by the end of the test. Mean time of removing thrombi was 2.4 minutes with mean volume blood drainage of 84 ml. Angiograms showed the approximately complete patency of the pulmonary arterial trunk after reopenning of occlusion but still with remnont thrombi within distal branches and arterial pressure with blood gas returned to normal level. Pathology revealed the recanalization of pulmonary arterial trunk but with thromi still staying in the distal branches,and effusion around the arteries. Conclusions The self-made percutaneous catheterized thrombectomy device is effective,feasible and comparatively safe in the treatment of acute massive pulmonary embolism in this primary test.

Objective To observe the efficacy and untoward reactions of FOLFOX4 regimen and XELOX regimen in the treatment of patients with advanced colorectal cancer.Methods Fifty four advanced colorectal cancer patients were randomly divided into two groups.Group A (FOLFOX4):28 patients were treated with oxaliplatin 85 mg/m2 on day 1,LV 200 mg/m2 as a 2h infusion followed by bolus 5 -FU 400 mg/m2 and a 24h infusion of 5 -Fu 600 mg/m2 ,repeated for consecutive days every 2 weeks.One cycle was 14 days and efficacy was evaluated after 4 cycles.Group B(XELOX):26 patients were treated with oxaliplation 130mg/m2 on day 1,capecitabine 1 000 mg/m2 orally daily for 14 days.One cycle was 21 or 28 days and efficacy was evaluated after 2 cycles.Efficacy of the two groups was evaluated at 2 cycles.Results All 54 patients were available for evaluating objective response.In A group,the overall response rate was 46.4%,and the overall response rate was 42.3% in B group.The overall response rate of A group was slightly higher than B group,but there was no statistically significant difference(χ2 =0.093,P =0.791 ).Adverse reactions:thrombocytopenia incidence rate and the peripheral nerve toxicity had no significant differences between the two groups(χ2 =0.552,0.108,P =0.550,0.787).The incidence rates of nausea, vomit,diarrhea and leucocytopenia in B group were lower than those in A group(χ2 =9.495,4.862,6.273,P =0.003,0.033,0.108).The incidence rate of hand -foot syndrome was higher in B group than in A group(χ2 =13.389,P =0.000),but the severity was less(grade Ⅰ ~Ⅱ).Conclusion The response rate in the treatment of advanced colorectal cancer was similar between XELOX and FOLFOX4 regiments,but XELOX regiment has the advantages of more convenience,better safety.Thus,XELOX regiment is worth recommending as a first -line therapy for the treatment of patients with advanced colorectal cancer.

Objective To observe the clinical effects of pemetrexed alone or pemetrexed combined with platinum in the treatment of advanced non -squamous non -small cell lung cancer who failed first line therapy. Methods 34 patients with advanced NSCLC who had failed to previous chemotherapy and all of these patients had been confirmed with pathology or cytology.Pemetrexed monotherapy group included 14 cases and pemetrexed plus platinum group included 20 cases.21 days as one cycle.All patients who received 2 or more cycles could be evaluated. Results No complete response (CR)occurred.There were 3 cases of partial response (PR),15 cases of stable disease(SD)and 16 cases of progressive disease(PD)in the 34 patients.The disease control rate was 52.9%(18 /34).The median progressive free survival was 2.7 months.The major toxic reaction included leucopenia,anemia and gastrointestinal response.Conclusion Pemetrexed or pemetrexed combined with platinum can prolong the survival time of some patients of non -squamous non -small cell lung cancer who failed first line therapy.The toxic effects can be tolerated.