Objective To evaluate the efficacy of nalmefene in preventing sufentanil-induced cough during induction of general anesthesia.Methods One hundred American Society of Anesthesiologists physical status Ⅰ orⅡ patients of both sexes,aged 21-62 yr,weighing 45-82 kg,undergoing elective laparoscopic cholecystectomy under general anesthesia,were divided into 2 groups (n =50 each) using a random number table:nalmefene group (group N) and control group (group C).Nalmefene 0.25 μg/kg was injected intravenously at 2 min before anesthesia induction in group N,and the equal volume of normal saline was given instead in group C.Anesthesia was induced with target-controlled infusion of propofol,and sufentanil 0.5 μg/kg was injected over 5 s when bispectral index value reached 55.The number of patients who developed cough within 2 min after sufentanil injection and severity of cough were observed.Other iv anesthetics were given for induction after the end of observation.Results The incidence of sufentanil-induced cough was 8％ in group N and 48％ in group C.Compared with group C,the incidence and severity of cough were significantly decreased in group N (P＜0.05).Conclusion Nalmefene 0.25 μg/kg injected at 2 min before induction of anesthesia can effectively decrease the development of sufentanil-induced cough during induction of general anesthesia.

[Objective]To investigate the effects of doxycycline on rabbit immobilized osteoarthritis and their mechanism.[Method]Twenty-four rabbits were randomly divided into normal,model,control and treatment groups,with 6 rabbits in each group.All of the animals were immobilized the lower left limbs with plaster bandage for 4 weeks except normal group.Doxycycline was orally given to treatment group.Cartilage degeneration of the medial condyle of femur was observed at 4 weeks and the levels of collagen-Ⅱ,uPA and MMP-13 were tested.[Result]Cartilage degeneration in treatment group was significantly slighter than those in model and control groups.Data of collagen-Ⅱ,uPA and MMP-13 between model and control groups had no significant difference,but a noticeable statistical difference among other groups.The uPA activity was positively correlated with MMP-13.[Conclusion]Doxycycline inhibits the degeneration process of cartilage and improves the structure.The effects may be related to the inhibition of uPA and MMP-13.

The effects of oxidized low density lipoprotein (ox-LDL) on the proliferation of cultured human vascular smooth muscle cells (vSMC) were investigated in vitro. By using NaBr density gradient centrifugation, LDL was isolated and purified from human plasma. Ox-LDL was produced from LDL by being incubated with CuSO(4). ox-LDL was then added to the culture medium at different concentrations (35, 60, 85, 110, 135 and 160 microg/mL) for 7 days. The influence of ox-LDL on vSMC proliferation was observed in growth curve, mitosis index, and in situ determination of apoptosis. The data were analyzed with SPSS 10.0 software. The results showed that the ox-LDL produced in vitro had a good purity and optimal oxidative degree, which was similar to the intrinsic ox-LDL in atherosclerotic plaque. ox-LDL at a concentration of 35 microg/mL demonstrated the strongest proliferation inducement, and at a concentration of 135 microg/mL, ox-LDL could inhibit the growth of vSMC. ox-LDL at concentrations of 35 and 50 microg/mL presented powerful mitotic trigger, and with the increase of ox-LDL concentration, the mitotic index of vSMC was decreased gradually. ox-LDL at higher concentrations promoted more apoptotic vSMCs. ox-LDL at lower concentrations triggered proliferation of vSMCs, and at higher concentrations induced apoptosis in vSMCs. ox-LDL played a promotional role in the pathogenesis and development of atherosclerosis by affecting vSMC proliferation and apoptosis.

BACKGROUND:A large number of studies have shown that adult stem cels derived from multiple tissues are available to differentiate towards nucleus pulposus-like celsin vitro. It is unclear whether mesenchymal stem cels derived from nucleus pulposus tissues have the ability to differentiate towards nucleus pulposus-like phenotypes induced by transforming growth factor-beta 1. Up to now, there are few reports on the difference between the differentiation ability of mesenchymal stem cels derived from nucleus pulposus tissues and adipose-derived mesenchymal stem cels. OBJECTIVE:To compare the ability of mesenchymal stem cels derived from nucleus pulposus tissues and adipose-derived mesenchymal stem cels differentiating into nucleus pulposus-like cels under induction of transforming growth factor-beta 1. METHODS:The groin fat tissue and the coccygeal spine of rats were taken respectively to isolate and culture mesenchymal stem cels derived from nucleus pulposus tissues and adipose-derived mesenchymal stem cels by mechanical enzyme digestion method. Flow cytometry was employed to detect the expression of CD105, CD90, CD29, CD45, CD44, CD34, and CD24 of both two kinds of stem cels. Mesenchymal stem cels derived from nucleus pulposus tissues and adipose-derived mesenchymal stem cels were divided into complete induction group (complete induction medium with transforming growth factor-beta 1), incomplete induction group (complete induction medium without transforming growth factor-beta 1) and control group(DMEM/F12 containing 10% fetal bovine serum and 100 mg/L penicilin/streptomycin), respectively. After 14 days of culture, real-time PCR was used to detect the expression of colagen type II, Aggrecan and SOX-9 in each group. RESULTS AND CONCLUSION:CD105, CD90, CD29 expressed positively and CD45, CD44, CD34, CD24 negatively in both two kinds of stem cels. After 14 days of induced differentiation, the expressions of colagen type II, Aggrecan and SOX-9 in the two kinds of cels were significantly higher in the complete induction groups than in the control groups (P < 0.05). Under the induction of transforming growth factor-beta 1, the expression of colagen type II, Aggrecan and SOX-9 in mesenchymal stem cels derived from nucleus pulposus tissues was significantly higher than that in adipose-derived mesenchymal stem cels (P < 0.05). These findings suggest that both two kinds of mesenchymal stem cels have the ability to differentiate towards nucleus pulposus-like cels induced by transforming growth factor-beta, and mesenchymal stem cels derived from nucleus pulposus tissues may be more suitable as seed cels for nucleus pulposus tissue engineering research.

Objective To investigate the effects of perfusion pressure with a cardioplegic solution on endothelium-dependent relaxation and smooth muscle function of porcine coronary artery. Methods The hearts were infused with a modified St.Thomas’ hospital solution at the pressures of 40, 60 and 80 mmHg. The distal part of porcine left anterior descending coronary artery (LAD) having a diameter of 1.0-1.5 mm, was dissected free from the surrounding tissue, cut into 1 mm long segments, immediately transferred to organ baths for the evaluation of endothelial and smooth muscle function. Results Smooth muscle function was not affected after cardioplegic flushing at the pressures used in this study. The maximal endothelium-dependent relaxations of the vessels in 40 and 60 mmHg groups were not reduced compared to fresh segments . The maximal EDR was significantly reduced to (90.8?2.2)% (P

This study is to develop a therapeutic drug monitoring (TDM) network server of tacrolimus for Chinese renal transplant patients, which can facilitate doctor to manage patients' information and provide three levels of predictions. Database management system MySQL was employed to build and manage the database of patients and doctors' information, and hypertext mark-up language (HTML) and Java server pages (JSP) technology were employed to construct network server for database management. Based on the population pharmacokinetic model of tacrolimus for Chinese renal transplant patients, above program languages were used to construct the population prediction and subpopulation prediction modules. Based on Bayesian principle and maximization of the posterior probability function, an objective function was established, and minimized by an optimization algorithm to estimate patient's individual pharmacokinetic parameters. It is proved that the network server has the basic functions for database management and three levels of prediction to aid doctor to optimize the regimen of tacrolimus for Chinese renal transplant patients.

Tumor necrosis factor-related apoptosis-inducing ligand(TRAIL)is the third member of the tumor necrosis factor(TNF)superfamily.It has received much concern because of its selective killing effect on tumor cells and virus infected cells.However,the subsequent studies have suggested that TRAIL also induces normal cells,such as the death of neurons and oligodendrocytes.TRAIL is associated with a variety of central nervous system diseases including primary brain tumor,multipie sclerosis and ischemic stroke.

Tumor necrosis factor-like weak inducer of apoptosis(TWEAK)is a new member of the tumor necrosis factor family.After TWEAK binding to its receptor Fn14.it induces extensive biological activities.TWEAK-Fn14 pathway participates in pathophysiological mechanisms of cell apoptosis,regulation of the blood-brain barrier permeability and inflammation in central nervous system,and it is closely correlated with the diseases such as ischernic stroke.multiple sclerosis and gliocytoma.

Thrombolysis can effectively treat ischemic stroke, but it has the risk of resulting in hemorrhagic transformation. A number of studies have suggested that hemorrhagic transforma-tion is closely correlated with matrix metalloproteinase mediated disruption of blood-brain barrier and the increase of vasopermeability. The increase plasma matrix metalloproteinase(MMP) -9 can be used as an independent predictor of hemorrhagic transformation. Using MMP inhibitors during the early cerebral ischemia may reduce the incidence and severity of hemor-rhagic transformation, however, it needs to be further validated.

Objective To investigate the clinical guiding significance of lymphoscintigraphy with 99mTc-DX for radical lateral lymph node dissection with pelvic autonomic nerve preservation(PANP) in lower rectal cancer.Methods In 67 patients with pathologically proven lower rectal cancer,37MBq/0.8ml 99mTc-DX was injected into submucosa of the rectum through rectal endoscopy.At 0.5h,1h,2h,3h,4h,6h,12h,and 24h after the injection,the patients underwent pelvic and lower abdominal lymphoscintigraphy. The operative method was determined according to the imaging results,and the results of lymphoscintigrams were correlated with postoperative lateral node histologic examination.Results The scintigrams were postive in 37 cases,and all were unilateral.The positive patients underwent PANP.The image results were compared with histological lymph node examination in all patients operated upon for rectal cancer.Histologically,the cases in conformity were 26(70.3 %),false positive in 11 cases(29.7 %),and 2 of 30 false positive patients who demonstrated metastases to lateral node were operated by PANP,while the others underwent only PANP(type Ⅰ) without lateral lymph nodes dissection.The percentage of good sexual function of the two groups of cases after operation was 74.4 % and 71.4 % respentively.The percentages of mild dysuria and good function of urination were both 100 %.Conclusions Lymphoscintigraphy with 99mTC-DX has particular guiding significance in selection of PANP for lower rectal cancer.