Objective:To investigate the prognostic value for low-dose dobutamine stress echocardiography(LDDSE)in patients with acute myocardial infarction.Methods:In 2004,47 patients with acute myocardial infarction in stable condition were given LDDSE checks in our hospital,and conduct follow-up period of 5 years.Results:No patients with serious complications in LDDSE,the overall cardiac function improved,expressed as LVED decreased,LVEF increased(P

Objective To investigate the effects of the transfection of DNMT1 antisense oligonucleotide wrapped in liposome on the promotor methylation and expression of progesterone receptor in leukemia cell lines so as to find a new pathway of methylation for gene therapy. Methods Artificially synthesized DNMT1 antisense oligonucleotide MG88 wrapped in liposome was transfected into the leukemia cell line. Changes of DNMT1 & PRB mRNA were detected by RT PCR, and the changes of the methylation status of PRA & PRB were analyzed by MSP. Results After transfection of leukemia cell line with MG88, DNMT1 mRNA decreased significantly. PRA & PRB promotors were demethylated, and the expressions of PRB mRNA increased significantly. Conclusion MG88 can induce the demethylation of PR promoters in leukemia cell line, resulting in the increase of PRB mRNA expression. So MG88 can be used in the experimental study of DNA methylation for gene therapy.

The changes of selenium metabolsim, glutathione peroxidase acivity and lipid peroxides content in the tissues of rats suffering from 30% TBSA full thickness scalding were observed in the first 7 days after injury. It was found that selenium content in the rat tissues decreased remarkably after injury,which in turn resulted in serious reduction of glutathione peroxidase activity and significant increase of lipid peroxides in the serum, erythrocytes and liver. However the muscular tissue showed no significant changes.These facts imply that after burn injury, the body is in a state of selenium deficiency, the loss of selenium might be responsible for the reduction of anti-peroxidation ability of glutathione peroxidase, and consequently there is an increase of lipid peroxides in the tissues. Only the muscular tissue is insensitive to lipid peroxiation. It is believed that the reduction of anti-peroxidation ability of glutathione peroxidase after burn injury might be one of the main causes to intensify the injury resulting from free radicals.

Objective: To establish the norm of occupational stress norm, as well as gender normative sample in southwest China. Methods: In this study, cross-sectional study method, and a synthetic way of sorting and randomized sampling were adopted to deal with research targets with revised occupational stress inventory (OSI-R) for 4278 participants.Results: The results of gender show that there were heavier occupational role , stronger interpersonal and physical strain in male than that in female(166.5?27.0/158.5?26.4,25.6?4.4/25.1?4.4,22.6?5.6/21.2?5.2,P

Objective This research aimed to compare two regimens of anesthesia(vecuronium-fentanyl and cisatracurium-remifentanil)for kidney transplantation patients.Methods 108 patients were studied,45 patients(Group Ⅰ)received balanced anesthesia with vecuronium and fentanyl,to the others 63(Group Ⅱ),cisatracurium and remifentanyl was given.Comparison of the difference between the two groups was made on the extubation time,intraoperative hemodynamics,postoperative urine output,serum creatinine and anesthesia complications.Results Extubation time of the Group Ⅰ was significantly longer than that of Group Ⅱ(33.5min ±17.5min,P＜0.05),but there was no difference between two groups on intraoperative hemodynamics,postoperative urine output,serum creatinine and anesthesia complications.Conclusions Both of the two regimens can provide safe anesthesia for kidney transplantation.Patients received regimen of cisatracurium and remifentanil experienced shorter extubation time.This regimen may be a better anaesthesic regimen for renal transplantation.

0.05),but the 24h urine zinc level increased markedly(P

Objective To construct the RNAi eukaryotic vector of inhibitory member of the ASPP family(iASPP) gene and observe the interfering effect in Jurkat cell line after the vector transfection.Methods The specific siRNA sequence was designed according to the iASPP sequence in GenBank.The sequence was cloned into PGCsilencer~(TM) H1/Neo/GFP and then sequence analysis was performed.The recombinant plasmid was transfected into Jurkat cell by liposome.The iASPP expression was analyzed by RT-PCR and cell apoptosis was detected by FCM.Results The sequence of templet and specific siRNA was correct by sequence analysis.The iASPP expression in Jurkat cells decreased and the apoptosis rate increased from 11.81% to 33.15% after RNAi transfection.Conclusion The RNAi eukaryotic vector PGCsilencer~(TM)H1/Neo/GFP/RNAi was constructed successfully.The RNAi inhibitory effect on the Jurkat cells is confirmed.The successful construction of iASPP RNAi makes it possible to further study the interaction between iASPP and p53.

Treating from liver is an important thought to treat esophageal cancer.Regulating the liver has very important significance in the process of treating esophageal carcinoma,which embodies at regulating liver is the key of soothing emotional injuries of esophageal carcinoma,removing esophageal pathology product and coordinating rising-descending function of spleen and stomach,and improving accompainedg symptoms of esophageal cancer.The thought of treating from liver should be used throughout the whole process of the treatment.So we must pay morn attention to regulate the liver and prevent liver injury during the differentiation and treatment of esophageal carcinoma.

Objective To assess the value of a fibrin-targeted contrast agent (EP-2104R) for MR detection of thrombus, and to compare this modality with non-contrast-enhanced (NCE) MRI and Gd-DTPA injection at acute period after thrombus generation. Methods Thrombus was induced with external injury and stasis in 5 rabbits. MRI was performed before and after contrast agent injection at 6.0 h after injury, and the MRI findings were compared with that of histopathologically examinations. Results EP-2104R enhanced MRI accurately detected thrombus, which was superior to both NCE and Gd-DTPA injection (P<0.001). Gd-DTPA injection was not associated with improvement of thrombus detection. Conclusion Being a fibrin-targeted MR contrast agent for in vivo detection of acute thrombus, EP-2104R is superior to NCE MRI and Gd-DTPA injection.

BACKGROUND: The neurotoxicity and cardiotoxicity of bupivacaine have been reported frequently. However, the studies on bupivacaine-induced muscle toxicity are few.
OBJECTIVE: To establish and evaluate local intramuscular injection of bupivacaine on the changes in histomorphology and ultrastructure of rat multifidus muscle at various time points.
METHODS: A total of 54 male Sprague-Dawley rats weighing 280-320 g were randomly divided into black group (n=18), model group (n=18) and model control group (n=18). Each group was then equal y subdivided into three subgroups according to time points (4, 7 and 14 days) (n=6). Both sides of multifidus muscle of the rats (L4 and L5) were injected with 0.5% bupivacaine. The morphological and ultrastructural changes of multifidus muscle were observed and analyzed with light microscope and transmission electron microscope at 4, 7 and 14 days after model establishment.
RESULTS AND CONCLUSION: (1) A single intramuscular injection of 0.5% bupivacaine induced muscular damage. (2) Hematoxylin-eosin staining results showed fiber necrosis, inflammatory cel infiltration, and a smal amount of macrophages in local skeletal muscle. (3) Under the transmission electron microscope, the structure of myofibrils was destroyed or disintegrated; kinds of bands and lines were indistinct, disrupted or disappeared; the structure of mitochondria was abnormal, the mitochondrial cristae were reduced or disappeared. In the 7- and 14-day groups, multifidus muscle proliferated and repaired. (4) Ultrastructural change scores in skeletal muscle were significantly higher in the model group than in the blank and model control groups (P < 0.05). Above scores were significantly greater in the 4-day group than in the 7- and 14-day groups (P < 0.05), and higher in the 7-day group than in the 14-day group (P < 0.05). (5) Results suggest that a single intramuscular injection of 0.5% bupivacaine can result in pathological changes of skeletal muscle from morphology and ultrastructure. This method can establish a suitable model of skeletal muscle injury.