(0.05)).The decrease level of TC and LDL-C in G2 groups was lower than in G1 group,showing significant difference with that in G1 group(P

Objective To investigate the expressions of Caveolin-1 and cyclin D1 and their significance in gastric cancer,and offer effective experiment evidence for the decision of gastric cancer prognosis and multitude pathway therapy.Methods The protein expression of Caveolin-1 and cyclin D1 were detected by immunohistochemistry in 120 cases of gastric cancer and 30 cases of normal gastric tissue.The correlations were analyzed between Caveolin1 and cyclin D1 expression and the clinicopathologic features of gastric cancer.Results The decreased expression of Caveolin-1 in gastric cancer may be negative correlated with tumorous differentiation degree,infiltration depth,lymphoid node metastasis and TNM stage;the increased expression of cyclin D1 in gastric cancer was positively correlated with tumorous differentiation degree,lymphoid node metastasis and TNM stage(r =- 0.297,P =0.001).Conclusion The expressions of Caveolin-1 and cyclin D1 were negatively correlated,and their negative synergy may be closely related to the occurrence,development and evolution of gastric cancer.Caveolin-1 and cyclin D1 were novel prognostic mark ers of gastric cancer,and may play an important role in the treatment of gastric cancer.

ABSTRACT:Objective To investigate the bone marrow stem cell mobilization and homing changes of peripheral blood due to diabetic myocardial ischemia in rats and the change of expression of the vascular endothelial growth factor (VEGF)and the tumor necrosis factorα(TNFα)in ischemic myocardial tissue.Methods The diabetic model of male Sprague-Dawley rats was created by intraperitoneal injection of streptozotocin first.Then the diabetic myocardial ischemia model was established through ligation of the left anterior descending coronary artery. The rats were divided into ischemic day-1,day-3,day-7,and day-28 groups.And their time-matching diabetic sham operation control group and normal sham operation control group were also established,with 6 rats in each group. Flow cytometry was used to measure the percentage of CD34+ cells in peripheral blood mononuclear cells for each group.Immunohistochemistry was used to observe the homing of CD34+ cells and the expression of VEGF and TNFαin the ischemic myocardium.Results The mobilization of bone marrow stem cells was initiated after the surgery in the rat models of myocardial ischemia in diabetes and it peaked within 1 week and decreased with the passage of time.Accordingly the homing of CD34+ cells and the expressions of VEGF and TNFαin the ischemic myocardium were significantly increased.Conclusion During the early stage,the diabetic ischemic myocardium can mobilize bone marrow stem cells into the peripheral blood and start homing to the ischemic myocardium by increasing VEGF and TNFαin the ischemic myocardium,thereby initiating the self-protection mechanisms.

Objective To study the effet of ET-1 and ECE on endothelial proliferation of autografted vein.Methods An animal model of the autogenous vein graft was established in 80 Wistar rats.The expression of ECE and EF-1 gene was determined by RT-PCR and immunohistological method to test the mRNA and protein expresion level respectively.Results PCNA positive smooth muscle cells appeared 6 hours after transplantation,increased with time,and reached a peak at 1 to 2 weeks.After 2 weeks,PCNA positive SMC in the tunica media began to decline and recovered to the 6 hour level at 8 weeks after the operation.mRNA of ECE increased with the time after the operation,reached a peak after 1-2 weeks,declined afterwards,and became stable at around 8 weeks.Expression change of ET1 was similar to the change of ECE,reached the peak after 1-2 weeks and was stable after 8 weeks(r=0.975).Conclusions The time and pattern of change of the pathologic process of intimal hyperplasia are in agreement with the expression of ET-1 and ECE,and suggests that ECE is involved in the process of intimal hyperplasia of vein graft.

Antimicrobial peptides ( AMPs) are a kind of micromolecular peptides with antibacterial , antivirus and anti-tumor activities.Unlike conventional antibiotics , acquisition of resistance by a sensitive microbial strain against AMPs is surprisingly improbable .AMPs are not widely used clinically due to their toxicity , susceptibility to proteolysis and high manufacturing cost .Researchers have obtained some AMPs with high activity and low toxicity by structure modifications . The molecular design of AMPs as well as their development in the future are reviewed .

Objective To study the diagnosis and operation timing of acute mesenteric ischemia(AMI).Methods A retrospective analysis based on the clinical characteristics,the methods of diagnosis and treatment,and operative results of 21 patients with AMI admitted in our hospital from January 1997 to December 2007 was performed.Results The diagnosis were certified by color doppler ultrasonography in five cases,spiral CT in eleven cases,DSA in two cases,and abdominal exploration in three cases.One case was cured by anticoagulation /thrombolytic therapy;and one case was confirmed with selective vascular angiography and cured by urokinase perfusion via the catheter;after removing the thrombus followed by anticoagulation /thrombolytic via Fogarty balloon catheter,ischemia of intestine completely recovered in three cases,partial small bowel resection were performed in eight cases,"second-look" operation in two cases,and subtotal small bowel resection in six cases.Three cases developed short-gut syndrome and three cases died after operation.Conclusions Imageological examination is essential for diagnosis of doubtful cases of AMI,and adequate treatments and timely selection of operation are critical to attain early diagnosis and good results.

Objective:To investigate the changes of ultrastructure of myocardial cells and the expression levels of tumor necrosis factor α(TNF-α) in myocardium tissue of the diabetic rabbits during early myocardial ischemia and their mechanisms,and to provide the theoretical basis for studying the pathogenesis of diabetic myocardial ischemia injury.Methods:A total of 42 healthy male New Zealand white rabbits were chosen.The method of intravenous injection of alloxan in ear vein was used to establish the diabetic models in 26 rabbits among 42 rabbits;the method of partial ligation of left anterior descending coronary artery by thoracotomy was used to establish the diabetic myocardial ischemia models in 22 model rabbits with diabetes.A total of 16 (modeling succesfully) were divided into diabetic myocardial ischemia 7 d group and 28 d group;other 16 rabbits were used as sham operation groups at the relevant time points(7 and 28 d),and there were 8 rabbits in each group.The ultrastructure of myocardial cells was observed by transmission electron microscope;the apoptosis index (AI) of myocardial cells in ischemic myocardium tissue of the rabbits was detected by TUNEL method;the expression levels of TNF-α in ischemic myocardium tissue of the rabbits were detected by real-time RT-PCR method.Results:In sham operation groups,the nuclei of myocardial cells was bigger,the nuclear chromatin was in uniform distribution,the myofibril ordered arrangement,the sarcomere was neat;the mitochondria between myofibril were rich,and their structures were clear.For the rabbits in diabetic myocardial ischemia group,their early-stage cardiocyte nuclei were irregular in shape,myofibrils was loose in structure,the part of myofibril was broken,and the mitochondrial hyperplasia between the myocardial cells was obvious.Compared with sham operation groups,the AI of myocardial cells and the expression levels of TNF-α in the ischemic myocardial cells of the rabbits in diabetic myocardial ischemia 7 d and 28 d groups were significantly increased(P<0.05),and the indexes mentioned above in diabetic myocardial ischemia 7 d group was higher than those in diabetic myocardial ischemia 28 d group(P<0.05).Conclusion:The destruction of ultrasturctue and obvious apoptosis of the myocardial cells of the rabbits occur in the early stage of diabetic myocardial ischemia.The increasing of expression level of TNF-α may involve in the myocardial ischemic injury.

Objective To investigate the protective effects and mechanisms of granulocyte-colony-stimulating factor (G-CSF)on a rabbit model of chronic myocardial ischemia.Methods Myocardial ischemia models were created by partial ligation of the left anterior descending coronary artery in Japanese white male rabbits.Rabbits were subcutaneously injected with G-CSF (G-CSF group)or saline (control group)for 6 days after myocardial ischemia.The percentage of CD34-positive cells in the peripheral blood was evaluated by flow cytometry,and CD34-positive cells homing and vWF expression in the ischemic myocardium were determined by immunohistochemistry.Results Rabbits in G-CSF group had a higher survival rate than those in control group (P <0.05).Immunohistochemistry of the ischemic myocardium showed that compared with control group,G-CSF group had increased homing of CD34-positive cells on day 7 post-surgery,and more vessels on day 28 post-surgery by anti-von Willebrand factor staining.In addition,we observed an increase in the percentage of CD34-positive cells in the peripheral blood in G-CSF group.Conclusion G-CSF produces an obvious protective effect against chronic myocardial ischemia in rabbits by increasing stem cell mobilization,homing to ischemic myocardium and accelerating neovascularization.

BACKGROUND:During fracture healing, in addition to the need for appropriate biomechanical environment, the role of cytokines is also increasingly attracted attention.
OBJECTIVE:To study the effect of nerve growth factor and alpha-lipoic acid on fracture healing in rat models of femoral fracture.
METHODS:Sprague-Dawley rat models of femoral fracture were established. Seventy-two rats were randomly divided into three groups. In the control group, rats were intramuscularly injected with physiological saline. In the nerve growth factor group, rats were intramuscularly injected with nerve growth factor 200 ng/kg, once a day. In the combined therapy group, rats were intramuscularly injected with nerve growth factor 200 ng/kg and oral y taken alpha-lipoic acid 25 mg/kg, once a day. At 1, 2 and 3 weeks after administration, bony cal us volume was measured. Enzyme linked immunosorbent assay was used to measure serum bone morphogenetic protein-2 levels. Western blot assay was utilized to detect bone morphogenetic protein-2 protein expression at the broken end of fracture. Semi-quantitative RT-PCR was applied to examine vascular endothelial growth factor mRNA expression.
RESULTS AND CONCLUSION:(1) At 1 week after administration, no significant difference in bony cal us volume was detected among the three groups. Serum bone morphogenetic protein-2 level, bone morphogenetic protein-2 protein expression, and vascular endothelial growth factor mRNA expression were significantly higher in the nerve growth factor group and combined therapy group compared with the control group (P<0.05), but no significant difference was found between the two groups. (2) At 2 weeks after administration, the amount of cal us, serum bone morphogenetic protein-2 levels, bone morphogenetic protein-2 protein expression, and vascular endothelial growth factor mRNA levels were significantly higher in the nerve growth factor group and combined therapy group compared with the control group (P<0.05). Above expression levels were higher in the combined therapy group than in the nerve growth factor group (P<0.05). (3) At 3 weeks after administration, serum bone morphogenetic protein-2 levels, bone morphogenetic protein-2 protein expression, and vascular endothelial growth factor mRNA levels were significantly decreased in the nerve growth factor group. However, above expression levels were stil high in the combined therapy group, and significantly higher than in the nerve growth factor group (P<0.05). (4) These results indicate that nerve growth factor combined with alpha-lipoic acid had better effects on the fracture healing compared with the nerve growth factor alone.

Objetive: To investigate the operative method of the true aneurysm in the initial part of splenic artery, and to summary clinic therapeutic experiences. Methods: To summary the 7 patients who suffered from the initial splenic true aneurysm from 1996 to 2006, and which cases were identified by color ultrasound, CT scan and angiography. All splenic aneurysm were cut off including splenic artery revascularlization on 5 patients. Results: All patients were cured and discharged from hospital in the 10th-14th day, and which patients were followed-up for 1-9 years. 5 cases were healthy except one died of acute myocardiac infarction 2 years later post operation. Conclusion: To cut off the initial splenic true aneurysm and to revasculize splenic artery is a better operative method to cure this disease.