BACKGROUND:Autologous stem celltransplantation to the heart is a research direction of heart failure treatment, but there are relatively few of studies about autologous bone marrow mesenchymal stem celltransplantation targeting the cardiac conduction system. OBJECTIVE:To evaluate the potential of rabbit bone marrow mesenchymal stem cells for treatment of heart block. METHODS:Rabbit bone marrow mesenchymal stem cells were induced by 5-azacytidine to differentiate into cardiomyocyte-like cells. After thoracotomy, the left atrium-left ventricular anterior wal was sutured in 14 New Zealand white rabbits (8 in the experimental group and 6 in the control group). One month after the surgery, in the experimental group, autologous bone marrow mesenchymal stem cells induced by 5-azacytidine for 4 weeks were labeled with 4',6-diamidino-2-phenylindole and then injected into the suture area when opening the thoracic again. In the control group, cells cultured in medium were used. One month after celltransplantation, the third thoracotomy was done to insert electrodes into the left atrium and left ventricular anterior wal , for cardiac electrophysiological detection. Whether atrioventricular pathway formed in the suture area was observed. RESULTS AND CONCLUSION:After cells were transplanted into the sutured area, two rabbits in the experimental group were discovered to form the atrioventricular pathway in the sutured area through cardiac electrophysiological examination. After transplantation, transplanted cells were visible on the heart frozen sections under fluorescence microscope in the left ventricle and sutured area, but there was no cellin the control group. In the experimental group, bone marrow mesenchymal stem cells expressed Cx43 and formed gap junction intercellular communication with cardiomyocytes, which was presented as formation of the atrioventricular pathway on cardiac electrophysiology examination. These findings indicate that bone marrow mesenchymal stem cells can be used to treat cardiac conduction system block diseases.

Objective To explore the reversing mechanism of multidrug resistance of ciclosporin(CsA) on K562/A02 cell line,attenuating DNA damage repair through H2AX suppression.Methods K563 and K562/A02 respectively co-cultured with adriamycin(ADM) of different concentrations and CsA.MTT assay was employed to determine the inhibitory concentration of 50 percent(IC50),the resistance times and the reversal times.The K562/A02 cells treated with CsA,and reverse transcriptase(RT)-PCR technique was used to examine the mdr1 and H2AX mRNA level.Flow cytometry was used to measure P-glycoprotein(P-gp) and H2AX expression.Neutral comet assay was used to detect the level of DNA double strands break(DSBs) of the K562/A02 treated with ?H2AX antibody.Results 2?10-3g/L CsA could increase the sensitivity of K562/A02 to ADM,and the reversal times was 5.28.Mdr1 mRNA level and H2AX mRNA level were decreased when treated with CsA(P

Objective To study the influences of fenofibrate on oxidative stress and endoplasmic reticulum stress in livers of hyperlipidemic rats. Methods Male SD rats were fed with high-fat diet for 12 weeks to induce a model of hyperlipidemia, then divided into control group, high-fat diet group with another four-week high-fat diet and fenofibrate group, in which rats were treated with fenofibrate [100 mg / (kg·d)] for 4 weeks. Then improvement of insulin resistance was detected in rats with GTT and ITT experiment. The serum levels of glucose (GLU), fasting insulin (FINS),triglyceride (TG) and total cholesterol (TC) were detected. The pathological changes of livers were detected with Oil Red O staining. The oxidative stress indices such as T-SOD, Mn-SOD, GSH and T-AOC were detected with liver homogenate. The expression of GRP78 was detected with real-time quantification RT-PCR and Western blot analysis respectively. Results Compared with rats with high-fat-diet, rats after fenofibrate treatment showed obviously improved insulin resistance, lower serum level of TG, TC and FINS (P < 0.05), decreased number and size of lipid droplets in liver tissue sections. T-SOD level in liver homogenate was significantly increased (P < 0.05), while GSH and T-AOC levels increased but had no obvious differences when compared with control group (P > 0.05). The expression of GRP78 at mRNA and protein levels were increased significantly after fenofibrate treatment (P < 0.05). Conclusions Fenofibrate has significant effects on improving insulin resistance and lipid regulation, which might be related to decreased oxidative stress and subsequent endoplasmic reticulum stress.

Objective To survey the distribution of TCM constitution of Guangxi adults.Methods Identification questionnaire of constitution in TCM was performed to identify the TCM constitution types of 3000 adults who were taken medical examination in the first affiliation hospital to GuangXi TCM university Health Administration Center or of permanent residence in Nanning,Wuming,Qinzhou,Hezhou.Results 612 cases (20.4％) had constitution of phlegm-dampness in 504 cases (16.8％) had constitution of phlegm-dampness,431 cases (14.3％) had constitution of yang asthenia,422 cases (14.1％) had constitution of qi asthenia,353 cases (11.8％) had constitution of damp-heat,348 cases (11.6％) had constitution of yin asthenia,159 cases (5.3％) had constitution of qi stagnation,100 cases (3.3％) had constitution of blood stasis,and 71 cases (2.4％) had allergic constitution.Conclusion There were 9 kinds constitutions in the adults of GuangXi province.The constitution of yin-yang harmony was the most among all.Most male had phlegm-dampness or damp-heat constitution.Most female had yang asthenia,qi asthenia,qi stagnation or yin asthenia constitution.

Objective Intrahepatic biliary papillomatosis(IBP)is a rare disease that is characterized by multiple numerous papillary adenomas in the intrahepatic biliary duct(IBD).The clinical features and outcome,however,are not well known.The clinicopathologic features,treatments and follow-up results were retrospectively analyzed in order to improve the efficiency of diagnosis and treatment for the disease.Methods Between August 2006 and October 2008,9 patients were diagnosed with IBP by histological findings at a tertiary referral center,Ningbo Medical Center(University of Ningbo,College of Medicine,Ningbo,China).The authors retrospectively reviewed the medical records to obtain clinical,radiological and pathologic data.The therapeutic results and follow-up data were also reviewed.Results The ratio of male to female was 2:7 and the middle age was 59 years.Repeated episodes of fever and right upper quadrant abdominal pain with or without jaundice were the common clinical manifestations.There were intrahepatic choledocholithiasis and/or history of previous biliary operation in 8 cases.The level of CA19-9 and CEA were almost normal.Imaging workup demonstrated cyst-like dilatation of intrahepatic biliary tree with or without liver atrophy,which were more obvious in the mucin-hypersecreting IBP.All of the 9 cases underwent curative resection with an adequate resection margin.Macroscopic findings demonstrated that the tumors of 9 cases were all located in the left lobe with mucin-hypersecreting type in 7 cases.The diameter of numerous papillary granular was usually less than 10 mm(from 2 to 5 mm.frequently)and friable,that filled the dilated IHD dispersive.Fine fibrovascular cores lined by dysplastic epithelial cells were frequently found under microscope.Few foci of stromalinvasion were noticed in the two cases with malignant transformation.All of the 9 cases survived and there was no recurrence.Conclusion IBP occurs more often in middle and old women who have history of biliary disease. Repeated episodes of cholangitis are the common clinical manifestations. Extra- and intrahepatic biliary tract dilatation is the common imaging finding.MRCP/ERCP is more valuable than others in diagnosis. Clinical and histological finding shows that IBP is a premalignant disease with high malignant potential. Curative resection should be done as earlyas possible for the long-term survival rate. The use of cholangioscopy in operation and rapid biopsy of resection margin will benefit the curative resection.

Objective Multidrug resistance-associated protein 1 (MRP1) has been reported with a close correlation with tumor multi-drug resistance. Real-time quantitative PCR (QRT-PCR) was performed to detect the MRP1 gene expression in childhood acute lymphoblastic leukemia (ALL) and its clinical signiifcance was analyzed. Methods Sixty-seven denovo ALL patients and 10 healthier children as bone marrow donor were studied. The chemotherapy was given according to CCLG-2008 protocol. SPSS software was employed to analyze the data and p-value below 0.05 was regarded as statistic signiifcance. Results MRP1 expression level showed a close correlation with ALL risk, the median of MRP1 expression was 4.28 (2.75~6.12), 5.62 (4.99~8.60) and 7.56 (3.66~11.13) for standard-risk group (SR), intermediate-risk group (IR) and high-risk group (HR), respectively. MRP1 mRNA expression in T-ALL group was 7.71 (6.49~14.35), which is higher than that of B-ALL (5.18(3.89~8.46)) (P<0.01). The rate of leukemia cells’ sensitivity to prednisone on 7th day was 70.6%in high expression group (n=34), which was signiifcantly lower than that in low expression group (n=33, 90.9%, P=0.035). The complete remission rateon 33th day was 64.7%in high expression group, and 87.9%in low expression group, which showed a signiifcant difference between them (P=0.026). Conclusions In children ALL, the expression of MRP1 is closely related with immunophenotyping, treatment response, hazard level and disease relapse.

The aim of this paper is to compare the cytotoxicity and cellular uptake efficiency of three kinds of poly(b-benzyl-L-amino) block-poly(ethylene glycol) nanoparticles (PXA-PEG-NPs) using Calu-3 cells, and select one as a nasal drug delivery vector for curcumin (Cur). Poly(gamma-benzyl-L-glutamate) block-poly(ethylene glycol) nanoparticles (PBLG-PEG-NPs), poly(gamma-benzyl-L-lysine) block-poly(ethyleneglycol) nanoparticles (PZLL-PEG-NPs) and poly(gamma-benzyl-L-aspartate) block-poly(ethylene glycol) nanoparticles (PBLA-PEG-NPs) were prepared by emulsion-solvent evaporation method. MTT assays were used to evaluate the cytotoxicity of PXA-PEG-NPs against Calu-3 cells. The cellular uptake of nanoparticles was visualized by an inverted fluorescence microscope and quantified by a flow cytometer. The results indicated that even at high concentration of 2 mg x mL(-1) the three nanoparticles had no cytotoxicity on Calu-3 cells. Compared to the curcumin solution, the three curcumin-loaded PXA-PEG-NPs showed significantly higher cellular uptake efficiency on Calu-3 cells (at equal concentration of curcumin with 5 microg x mL(-1) Cur solution), PBLG-PEG-NPs group was the highest. The cellular uptake increased with incubation time, and has positive correlation with nanoparticle concentration. In brief, PXA-PEG-NPs are conducive to delivery Cur into cells, and PBLG-PEG-NPs might be provided as a good nasal drug delivery carrier.

Objective To investigate the expressions of TF mRNA and TFPI mRNA of liver in rats with Vibrio vulnificus sepsis and to assess the interventional effects of cefoperazone sodium along with levofloxacin lac-tate. Method One hundred and ten male SD rats were divided (random number) into normal control group (NC group, n = 10), Vibrio vulnificus sepsis group (VV group, five subgroups n = 10 in each), drug intervention model (AA group, five subgroups n = 10 in each). The Vibrio vulnificus sepsis models and drug intervention models of rat were made. The reverse transcription polymerase chain reaction (RT-PCR) assay was employed for the measurement of TF mRNA and TFPI mRNA. ANOVA and t-test performed with SPSS version 12.0 software. Results Compared with NC, the expressions of TF mRNA in liver increased markedly 2 h,6 h, 12 h and 16 h af-termodeling in VV groups (P<0.05), and reached peak 6 hours after modeling. The expressions of TF mRNA in liver of rats in AA groups were much higher than those in NC group 9 h and 12 h after modeling (P<0.05). The expressions of TFPI mRNA in liver of rats in VV groups and AA groups were not significantly different to those in NC group (P>0.05). Compared with VV groups, the expressions of TF mRNA in liver of rats in AA groups were greatly lowered 9 hours after administration of bactericide (P<0.05), and the expressions of TFPI mRNA in liver of rats in AA groups were significantly higher 12h and 16 h after intervention (P<0.05). Conclusions There is a obvious imbalance between coagulation and anticoagulation functions of circulation system during Vibrio vulnificus sepsis, and the imbalance can be corrected gradually after treatment with antibacterial agents.

Objective To investigate the influence of preoperative diabetes mellitus (DM) on postoperative morbidity of pancreatoduodenectomy for pancreatic ductal adenocarcinoma.Methods The clinical data of 302 pancreatic ductal adenocarcinoma patients who underwent pancreatoduodenectomy from January 1,2005 to August 31,2012 were retrospectively analyzed.Results 113 patients (37.4％)had preoperative DM among the total 302 patients.The percentage of the major complication including pancreatic fistulas,delayed gastric emptying,infections,acute kidney injury and mortality accounted for 19.9％,12.9％,25.9％,36.0％,3.2％ and 3.5％ respectively.In the DM group,firm pancreatic texture was more common than that in non-DM group (x2 =15.175,P ＜ 0.01).While pancreatic fistula in the DM group developed less frequently(x2 =7.811,P =0.005) than that in non-DM group.Delayed gastric emptying,infections,acute kidney injury,hemorrhage,pulmonary,cardiovascular and neurologic complications,as well as length of stay in hospital and mortality were in similar frequency in the two groups (P ＞ 0.05).Binary Logistic regression analysis showed DM(OR =0.358,P =0.035) and firm pancreatic texture(OR =0.395,P =0.032) were protective factors against pancreatic fistula while preoperative jaundice(OR =3.819,P =0.010) and intraoperative blood transfusion (OR =1.268,P =0.001) were predisposing factors for pancreatic fistula.Conclusions With good control of perioperative glucose level,DM does not increase operation risk in pancreatoduodenectomy for pancreatic ductal adenocarcinoma.

Objective:To explore the utilization of and satisfaction at community health service between migrant and non-migrant workers in Shenzhen city. Methods: Random sampling was used and 8000 community residents in Shenzhen city were investigated, and the data was analyzed with SPSS 18. 0. Results:There was statistically signifi-cant difference on the times of seeking community health services last year between migrant workers and non-migrant workers ( P<0. 0001 ) , and the proportion of more than three times service utilization of migrant workers were greater than that of non-migrant workers. The top three elements inpluencing satisfaction at community health service between migrant and non-migrant workers were service attitude ( 73. 29% vs. 73. 46%) , technical level ( 65. 29% vs. 67. 50%), and its convenience of seeking a doctor (63. 16% vs. 64. 98%). 73. 47% of users (migrant workers:74. 16%, non-migrant workers:69. 71%) were willing to accept the system of first contact in community health in-stitutions. Conclusions:The utilization of community health service has increased since implementing the system of first contact in community health institutions. Both migrant workers and non-migrant workers were very satisfied with the community health services, and the differences on satisfaction between the two groups were not significant. It is feasible to gradually promote the system of first contact in community health institutions over China.