Matrix metalloproteinase-2 (MMP-2) and matrix metalloproteinase-9 (MMP-9) are gelatinases of matrix metalloproteinase family,which play a crucial role in the cancer cell growth,differentiation,invasion,migration,the regulation of tumour angiogenesis and immune surveillance because of their ability to degrade extracellular matrix proteins.So they are significantly associated with development and progression of various tumors.In recent years,the inhibitors and drugs against MMP-2 and MMP-9 arouse wide concern.

Objective To investigate the allngeneic bone marrow mesenchymal stem cells (mesenchymal stem cells, MSCs) transplantation on cardiac rehabilitation and cardiac function after acute myocardial infarction (AMI). Method Acute myocardial infarction models were made by ligating the left anterior descending coronary artery of rats. A total of 90 rats were randomly divided into the cell transplantation group and control group, 45 rars in each group. Rats in the cell transplantation group were subdivided into 3 groups according to the administration time of the allogeneic bone marrow mesenchymal stem cells (2 weeks, 4 weeks and 12 weeks), and the control group was subdivided the same as in the cell transplantation group. The success criteria included the anterior my-ocardial wall darked and the Sr-segment elevation. The rat femur bone marrow cells were separated using centrifu-gal method, mononuclear cells were isolated by lymphocyte fluid, and the third generation of mesenchymal stem cells were obtained by washing, culture, passage and marked by 4, 6 diacetyl-2-phenyl Indole (DAPI). The ani-mals' chest was opened again a week later, the stem cell suspension was injected into the border zone of infarct area, and the control group was injected with medium. Pre-operative,2 weeks, 4 weeks and 12 weeks after trans-plantation, cardiac function was tested by ultrasonic, myocardial biopsy was observed by HE conventional staining, cardiac stem cells division were observed by immunofluorescence. All data was analyzed by software SPSS 10.0, Independent-Samples T test and Chi-Square test was used, and P≤0.05 was considered as statistically signif-icant. Results The markered hone marrow mesenchymal stem cells were left in the myocardial cells and differen-tiated to eardiomyocyte-like cells. After 12 weeks, the left ventricular internal diameter of rats in cell transplanta-tion group was about (0.58±0.09) mm(P<0.05). Thickness of myocardial infarction zone was (0.25±0.01) mm (P<0.05),ejection fraction was (67.52±0.61) (P<0.05) and left ventricular fractional shortening was (39.86±3.00) (P<0.05). In the transplantation group, the DAPI marked nucleus presented as blue, and the cytoplasm of myocardial cell presented as green. HE staining showed that, in the cell transplantation group, there was less scar tissue and a large proportion of nuclear, similar to the fetal or newhom myocardium cells. Conclu-sions The homogeneus mesenchymal stem cell could repair myocardial infarction and improve cardiac function af-ter infarction.

Four cases of abdominal vascular lesions were diagnosed with color Doppler flow imaging (CDFI). These cases include aneurysm of portal vein, splenic aneurysm intrahepatic pseudoaneurysm and carvenous trasformation of portal vein, Above cases were misdiagnosed by B-mode ultrasonogram, but well detected by CDFI. Therefore, we consider that CDFI combined with B-mode ultrasonography, is a noninvasive and accurate method for the diagnosis of abdominal vascular lesion and its differential diagnosis with abnormal, but non-vascular, duct or chamber structure.

The reasons for the low utilization rate of large equipment in the university are analyzed on the basis of the working experiences,and then some solutions are proposed,including the ad on LAN of the university and broadening the customer range of the lab.

Objective To investigate the change of glucose metabolism in warm ischemia/reperfusion injured kidney of rabbits in vivo by microdialysis and real-time electrochemical detection.Methods A total of 20 New Zealand rabbits were divided into experiment and control groups(10 in each).After anesthesia by intravenous injection of barbitone,an oblique incision under the 12th rid was made in the animals to expose the right kidney and the right renal artery and vein.Afterwards,a microdialysis probe was placed into the dorsal renal cortex along the long axle of the kidney.After 60 minutes to equilibrate,an electrochemical detection system was used to continuously determine the concentration of glucose in the renal cortex before ischemia.Then,ischemia/reperfusion injury model was established by clamping the renal pedicle for 60 minutes followed by perfusion for 60 minutes.The control group received the same intervention without clamping the renal pedicle.The glucose concentration of the microdialysis samples were analyzed before,during,and after the ischemia.Results The reaction of the glucose electrode to the electric current was linearly correlated with the concentrations of glucose,and the rate of microdialysis probe recycling was(63.6?2.1)%.The concentration of glucose in the renal cortical interstitial samples were(1.89?0.37),(0.69?0.12),and(0.62?0.14)mmol/L respectively before,during,and after the warm ischemia.During the ischemia phase,the mean concentration of glucose decreased by(36.7?2.4)% from the base level(LSD test,P=0.000).The glucose concentration of the experimental group was significantly lower than that in the control at both ischemia and reperfusion phases(t=-11.975,P=0.000;t=-11.993,P=0.000,respectively).Conclusions In vivo microdialysis combined with electrochemical detection provides a sensitive and real-time method for measuring the glucose concentration in warm ischemia/reperfusion injured kidney,which can suggest the ischemic condition of the renal cortex.

Both pretreatment of lignocellulose and its saccharification process are treated with ultrasonic wave.The morphology,structure and crystal performance of the original and treated lignocellulose sample were characterized by SEM and FTIR.Moreover,the changes of raw materials caused by different pretreatment ways and the affect of saccharification rate brought about by ultrasonic wave were also studied.The result shows that the ultrasonic wave decreases the crystallinity of lignocellulose destroying the intermolecular hydrogen bonding effectively and improves the degradation rate of lignin and the saccharification rate of zymohydrolysis availably.The mechanism of activation of ultrasonic wave in zymohydrolysis process was discussed primarily.

Objective To evaluate the value of Doppler indices of intrarenal artery (IRA) in clinicobservation in pregnancy induced hypertension(PIH).MethodsForty-six cases of PIH underwent Doppler measurment of PI,RI in IRA,and 186 normotensive pregnant women were measured as control.Results ①There was a larger increase of IRAPI and IRARI in PIH than in normal prgnant(P<0.001),and IRAPI is significantly higher in moderate and severe PIHs than in mild PIH(P<0.001),②IRAPI,IRARI correlate positively with classification of PIH(P<0.001),proteinuria(P<0.001)and MAP(P<0.05),and IRAPI is the best one.Conclusions It is of a certain significance to the clinical observation and treatment of PIH by using color Doppler to examine the indices of IRA in the pregnant women with PIH.