Background The identification of mesenchymal stem cells(MSCs) have provided exciting prospects for cell-based regeneration after myocardic infraction.However cell therapy have inherent limitations such as low survival rate of transplanted cells and insufficient cell number.It is known that cell-matrix adhesion plays a key role in cell proliferation,differentiation and survival,and chemokine CXCL12 may involved in these prcesses.Transfected mesenchymalstem cells with CXCL12 for local secretion of CXCL12 and then explored CXCL12 triggered adhesion of mesenchymal stem cells to extracellular matrix proteins.Mesenchymal stem cells was transfected with CXCL12.?V and ?3 integrins content was evaluated by Western blot analysis.Cell adhesion to extracellular matrix was examined in vitro and cell prolife-ration after transplantation in vivo.Transfection of CXCL12 resulted increased CXCL12 in situ.Increased CXCL12 induced elevated adhesion to fibronectin in vitro and higher survival in vivo.CXCL12 mediated adhesion and proliferation was established by ?V and ?3 integrin subunits.Chemoattractive mechanisms are involved in adhesion processes of mesenchymal stem cells.Increased CXCL12 leads to enhanced expression of ?V and ?3 integrins,which may augment cell survival,proliferation and differrentiation.

Objective To evaluate hepatectomy for liver metastasis in patients of gastric carcinoma.Methods Clinical data of 32 gastric cancer cases undergoing hepatectomy for hepatic metastatic tumor were reviewed retrospectively from 2006 to 2012.16 cases underwent radical gastrectomy and synchronous hepatectomy for liver metastasis,the remaining 16 cases underwent radical resection of gastric cancer and liver resection heterochronously.The relationship between prognosis and clinicopathology was analyzed.Results The overall survival rates were 84％,50％ and 37％ in 1 year,3 years and 5 years.The median survival time was 32 months.Gastric cancer invasion depth,intravascular tumor thrombi,lymphatic metastasis and intraoperative blood transfusion was related to poor prognosis by single factor analysis,while gastric serosal invasion,tumor thrombus and liver metastasis tumor ＞ 5 cm related to poor prognosis by multiple factors analysis.Conclusions Gastric cancer patients with liver metastasis who underwent hepatic resection can achieve good prognosis if hepatic metastatic tumor ＜ 5cm or the primary gastric cancer does not invade the serosa and without tumor thrombus.

Objective To observe the effects of tissue factor pathway inhibitor(TFPI) on thrombosis formation in rabbit carotid arteries after ballon injury. Methods Fouty rabbits with the weight 2.5-3.0 kg were respectively divided into 4 groups, Ad-TFPI, Ad-LacZ, PBS and normal control groups. The normal control group was not given any treatment and other 3 groups were given 0.2 ml Ad-TFPI, Ad-LacZ or PBS reproduced by the Dispatch catheter respectively after the PTCA balloon iniury on the right carotid arteries. Ten days after gene transfer the repeated balloon injury was performed in the 3 groups, and the first balloon injury was performed in the normal control group by the same method. The carotid blood flow was recovered immediately after the injury. Thirty minutes later all the animals were sacrificed. The injured carotid arteries and one part of contralateral normal artery were cut down, scissored along the long axis, flattened and fixed in the 2% glutaral. The platelet aggregation and thrombosis formation on the luminal surfaces was observed under electron microscope. Results The electron microscope results showed that the vascular endothelial cell structure was integrated and lined up in order in the nomal artery which had no any injury. After the balloon injury in the normal control group, the structure of the endothelial cell was disintegrated, and there was some platelet aggregation but no fibrosis formation. A large amount of platelet aggregated but no fibrosis formed in Ad-TFPI group after the repeated balloon injury. A large amount of fibrosis formed and red cells piled up in the Ad-LacZ and PBS group. The positive rate of thrombosis formation among groups had siginificant differences(χ2=14.95, P<0.01). The positive rate in Ad-TFPI group(20%) was lower than that in Ad-LacZ group(80%, χ2=7.20, P<0.01) and PBS group(70%, χ2=5.05, P<0.05), but was higher than that in the normal control group(10%, χ2=0.39, P>0.05). The positive rate in Ad-LacZ group(80%) was higher than in the normal control group(10%, χ2=9.90, P<0.01) and in the PBS group(70%, χ2=0.27, P> 0.05). The positive rate in PBS group(70%) was higher than that in the normal control group(10%, χ2=7.50, P< 0.01). Conclusions The repeated balloon injury method can cause a large amount of fibrosis formation in the rabbit carotid. TFPI gene inhibits thrombosis formation in balloon-injured rabbit carotid arteries.

Objective To observe the lung protection of Astragalus membranaceus against radiotherapy to intermediate-stage and terminal thoracic neoplasm, and its influence on TNF-α and ET expression.Methods The patients with intermediate-stage and terminal thoracic neoplasm under radiotherapy were divided into a treatment group and a control group.Patients in the treatment group took 10 ml of Asragalus membranaceus twice a day.for consecutive 6 months from the beginning of radio therapy.TNF-α and ET in the plasma were measured before and after the radiotherapy.The clinical symptom,iconographic changes and lung diffusion were observed from the 15th day of radiotherapy.Results The TNF-α and ET in plasma afterthe radiotherapy were(2.48±0.75)as/ml and(69.32±23.03)pg/ml for the treatment group,and(5.12±1.01)ns/ml and(97.87±37.83)pg/ml for the control group with the statistial difference(x2=7.49,6.57,P<0.001).The decrease of CO diffusion 5 and 10 months after the radiotherapy in the treatment group was statistically different compared with that in the control group(x2=3.98,3.78,P<0.05).There was a statistical difference of the incidence of acute radiation pneumonitis and pulmonary fibrosis between these two groups(P<0.05).Conclusions Astragalus membranaceus could inhibit the excess expression of TNF-α and ET in plasma and reduce the deterioration of diffusion after radiotherapy,so that it can be used for intervention of lung injuries from radiotherapy.

Objective:To investigate the effect of rapamycin on cell growth and migration of gallbladder cancer GBC-SD cells, and to discuss its potential in clinical therapy of gallbladder cancer. Methods: Proliferation of GBC-SD cells treated with different concentrations of rapamycin (12.5, 25, and 50 mmol/L) was examined by MTT assay. Cell cycle distribu-tion and apoptosis of GBC-SD cells treated with different concentrations of rapamycin were determined by flow cytometry. Migration ability of GBC-SD cells was assessed by Transwell assay. The expression of mTOR (mammalian target of rapam-ycin) and its phosphorylation in GBC-SD cells were examined by Western blotting assay. Results: Rapamycin significant-ly inhibited the phosphorylation of roTOR, but had no influence on the expression of roTOR in GBC-SD cells. Rapamycin significantly inhibited the growth of GBC-SD cells in a dose-dependent manner (P < 0.01). Raparnycin induced apoptosis of GBC-SD cells and arrested them at the G_1/S phase. Furthermore, rapamycin also significantly suppressed migration of GBC-SD cells as showed by Transwell assay (P < 0.01). Conclusion: Rapamycin can remarkably inhibit the growth and migration of gallbladder cancer cells, probably by inhibition of p-roTOR pathway, induction of apoptosis and cell cycle ar-rest of gallbladder cancer cells.

BACKGROUND:There is evidence that internal fixation through an anterior or posterior approach for treatment of severe kyphotic deformity in spinal tuberculosis exhibits good curative effects. However, few prospective, long-term fol ow-up case control studies are reported. OBJECTIVE:To investigate the efficacy and safety of cobalt al oy pedicle screw implantation for treatment of severe kyphotic deformity in spinal tuberculosis. METHODS/DESIGN:This is a prospective, single-center, self-control, open-label trial, which wil be performed at the Affiliated Hospital of Hebei University, China. Eighty-four patients with severe kyphotic deformity in spinal tuberculosis wil be included according to the diagnosis criteria. Among 52 patients with tuberculosis of the thoracic spine, 28 wil undergo surgery through a posterior approach, and 24 through an anterior approach. According to the Frankel Grade classification, grade C, D and E spinal cord function wil be assessed in 8, 31 and 13 patients, respectively. Surgery through a posterior and anterior approach wil be respectively performed in half of 32 patients with tuberculosis of the lumbar spine. Grade C, D and E spinal cord function wil be assessed in 7, 14 and 11 patients, respectively. The primary outcome measure of this study wil be the Cobb angle at the thoracic spine segments before and 2 years after surgery, which wil be used to evaluate the angle of the spine curvature at the thoracic segments. The secondary outcome measures wil be X-ray scan or MRI findings before and 2 years after surgery, which wil be used to evaluate vertebral fusion after internal fixation;and Frankel Grade before and 2 years after surgery, which wil be used to evaluate recovery of spinal cord function after injury. Other outcome measures wil include multiple logistic regression analysis results of the factors that influence patient's curative effects and the incidence of adverse events 2 years after surgery. The trial protocol has been approved by the Ethics Committee, Affiliated Hospital of Hebei University, China and wil be performed in strict accordance with the Declaration of Helsinki, formulated by the World Medical Association. Signed informed consent regarding the trial protocol wil be obtained from each participant. DISCUSSION:This study is to validate that cobalt al oy pedicle screw implantation shows precise curative effects in the treatment of severe kyphotic deformity in spinal tuberculosis and to analyze through what approach, posterior or anterior, internal fixation wil be more beneficial to surgery performance. The outcomes of this study wil provide objective long-term fol ow-up evidence for internal fixation treatment of severe kyphotic deformity in spinal tuberculosis in the clinic.

Objective To understand the status of drinking-water supply and the progress of waterimproving projects in drinking-water-borne endemic fluorosis areas in Henan,and to provide scientific data for related government departments to carry out prevention and surveillance plan for those areas.Methods Questionnaire survey was carried out in all the villages in drinking-water-borne endemic fluorosis areas in Henan in 2010.Each village was given one set of questionnaire.Results By the end of 2010,the total number of fluorosis villages in Henan was 25 434,among them 11 484 villages had been conducted water-improving projects,accounting for 45.15％.Currently,9267 water-improving projects worked properly,accounting for 36.4％(9267/25 434)of all villages surveyed,and 80.7％ (9267/11 484)villages had water-improving projects.The projects in 2217 villages do not work properly,accounting for 19.3％(2217/11 484) of all projects.There were 5832 water-imp.roving projects conducted amnog 2005-2010,accounting for 50.8％ (5832/11 484) of all water-improving projects.Among villages with no such projects,97.5％(15 769/16 167) of them used shallow groundwater,and in villages with water-improving projects,89.6％ (8303/9267) of them used deep groundwater as drinking-water supply.Conclusions After 2005,the water improving progress was significantly speed up in drinking-water-borne endemic fluorosis areas in Henan,but progress of the water improving projects is relatively slow due to changing and expanding of fluorosis areas.The government should increase investment and improve the proportion of waterimproving defluoridation.

Objective:To understand the status of drinking water-borne endemic fluorosis in Henan Province, so as to provide scientific basis for improving prevention and control strategies.Methods:Ten counties (districts, referred to as counties) were selected from drinking water-borne endemic fluorosis areas of Henan Province in 2018. Three villages in each project county were selected according to the disease status of mild, moderate and severe conditions, and the operation status of water improvement projects, water fluoride content and dental fluorosis among children aged 8 to 12 years in each diseased village were monitored.Results:Totally 30 villages were surveyed, all of which were in the water improvement projects; a total of 25 water improvement projects were monitored, all of them were in normal operation, and the water fluoride exceeding standard rate was 28.00% (7/25), the qualified rate of water fluoride in the water improvement projects was 72.00% (18/25). Among them, 21 villages were in normal operation and the water fluoride in the water improvement projects met national standard. In which the detection rate of dental fluorosis among children aged 8 to 12 years was 36.71% (606/1 651), the index of dental fluorosis was 0.74, and the epidemic intensity was extremely mild. Water fluoride of water improvement projects in 9 villages exceeded the national standard, where the detection rate of dental fluorosis among children aged 8 to 12 years was 43.57% (261/599), the index of dental fluorosis was 0.78, and the epidemic intensity was extremely mild. The detection rate of dental fluorosis among children in the villages where the water fluoride of water improvement projects exceeded the national standard was higher than that in the villages where the water fluoride of water improvement projects met the national standard (χ 2=8.752, P < 0.01). Conclusions:The excessive fluorine content in the water of water improvement projects is still serious, and the epidemic is still severe. It is necessary to strengthen the scientific demonstration of the water improvement project construction and the project acceptance upon completion, so as to prevent unqualified projects from being put into use. We will carry out regular water quality monitoring and promptly rectify projects with water quality exceeding the standards.

OBJECTIVETo evaluate the value of combined optical coherence tomography (OCT) and intravascular ultrasound (IVUS) examinations in detecting coronary artery plaque during percutaneous transluminal coronary intervention (PCI).

METHODSOCT and IVUS examinations were performed on 30 diseased coronary vessels from 27 patients underwent PCI from Feb. 2008 to July. 2008.

RESULTSSeventeen vulnerable plaques (4 intima tearing which were not detected by IVUS), 5 plaque rupture (1 out of 5 was detected by IVUS), 5 thrombus lesions (1 out of 5 was found by IVUS), 12 thin-cap lipid-rich lesions (2 detected by IVUS) were detected by OCT in 22 lesions (without 8 lesions post DES stents). Analysis result of plaque burden by IVUS was superior to that obtained by OCT. In 8 DES stents (implanted for 6 months to 4 years), OCT detected 2 had severe restenosis, 6 stents struts were completely covered with neointima without restenosis, 1 stent had aneurysm-like dilatation. IVUS results were similar except for limitations on exactly detecting neointima post stenting. In 19 newly implanted stents, the incidence of stent under-expansion detected by OCT was 26.0% (same as that by IVUS), stent malposition was 63.2% (10.5% by IVUS, P < 0.01), near stent tearing was 10.5% (not detected by IVUS), tissue prolapse between coronary stent struts was 52.6% (10.5% in IVUS, P < 0.05).

CONCLUSIONSOCT imaging is superior to IVUS on detecting vulnerable plaques and change of structure around stents while IVUS is superior to OCT on estimating plaque burden in patients underwent PCI.

Adult ; Aged ; Angioplasty, Balloon, Coronary ; methods ; Coronary Artery Disease ; diagnostic imaging ; therapy ; Drug-Eluting Stents ; Female ; Humans ; Male ; Middle Aged ; Radiography ; Tomography, Optical Coherence ; Ultrasonography, Interventional

16 and the distribution of severe trauma more than 2 anatomic parts.They were randomly divided into two groups:intensive insulin treatment group(n=31)and control group(n=31).Intensive insulin treatment group received insulin with insulin pump in order to maintain blood glucose levels at 4.0-6.1 mol/L,while the control group received routine insulin treatment in order to mmaintain blood glucose levels at 10.0- 11.0 mol/L.Plasma levels of TNF-?,IL-1,IL-6, CRP,APACHEⅡscores and cure rate were analyzed before and after the treatment.Data was expressed as mean?standard deviation.Two- tailed T test and ANOVA were used for comparison in SPSS 10.0,and changes were considered as statistically significant if P value was less than 0.05.Results After the intensive insulin treatment, patient's hemodynamic parameter apparently improved,APACHEⅡscores descended,and the levels of TNF-?, Ib-1,IL-6,CRP all declined,in comparison with control group,there were significant differences. Intensive insulin treatment might improve patient's general condition and decrease complications and mortality of severe multiple trauma.