AIM:To study the effect of panax notoginseng saponins on the left atrial appendage(LAA)of the guinea pigs.METHODS:Standard microelectrode intracellular recording technique was used to record the LAA action potential(AP)and the effective refractory period(ERP)in the guinea pigs during the pouring with different density of PNS.RESULTS:The effect of PNS in concentration of 0.7,7,70,700 mg/L was significant at 20 min,the APD50 and APD80 of the pouring at 20 min,30 min,40 min of the 70 mg/L was longer than the reference group(P

Objective:To examine the relationship between brain natriuretic peptide (BNP) and the recurrence of atrial fibrillation (AF) after successful electrical cardioversion (EC) by a meta analysis approach.Methods:Based on PubMed,Medline and China National Knowledge Infrastructure (CNKI) databases,related literatures,published from 1980-2008,were searched; a manual search was also performed.The included trials were analyzed by RevMan4.2 software for meta analysis.Results:Totally seven studies were finally included.The analysis revealed that the baseline BNP level were greater in patients with AF recurrence than those without AF recurrence,with the standardized mean difference in the BNP levels being 0.82 units (95% confidence interval 0.12 to 1.52).The test for overall effect Z-score was 2.30,with a P value of 0.02; there was significant difference.Conclusion:It is suggested that the higher BNP level after successful electrical cardioversion is associated with greater risk of AF recurrence.The level of BNP may serve as an indicator for AF recurrence after successful EC.

Objective To observe the efficacy and main complications of allogeneic hematopoietic stem cell transplantation(allo-HSCT)for 76 patients with hematopoietic malignancies.Methods From September 2001 to March 2007,76 patients received allo-HSCT in Department of Hematology,Xijing Hospital,Fourth Military Medical University.All cases included 24 acute myeloid leukemia(AML),15 acute lymphocytic leukemia(ALL)and 34 chronic myelogenous leukemia(CML)and 3 T cell lymphoma/leukemia.Donors were HLA-identical sibling(n=57),1 locus mismatched sibling(n=3),HLA-matched unrelated volunteer(n=9)and haplo-identical sibling(n=7).Conditioning regimen consisted of busulphan-cyclophosphamide or cyclophosphamide and total body irradiation plus Ara-c/VP-16.Graft versus-host disease prophylaxis was the standard methotrexate and cyclosporine combination.Anti-human thymocyte immunoglobulin(ATG)and CD25 monoclonal antibody was given in unrelated donor and haplo-identical HSCT.Results Totally 73 patients got sustained engraftment.Acute GVHD and chronic GVHD were found in 18/73(24.7%)and 24/73(32.9%)patients,respectively.Severe veno-occlusive disease occurred in 2 cases.Pure red cell aplasia was found in 5 patients with major ABO mismatched HSCT.With a follow-up of 3 to 76 months,43/76(56.6%))patients were still alive and 33/76(43.4%)died from leukemia relapse or transplantation-related complications.Conclusion Allogeneic heamatopoietic stem cell transplantation is an effective therapy for leukemia,especially in CML-chronic period and acute leukemia in complete remission,but there is high rate of relapse in patients with high-risk and refractory status before transplantation.

With the development of molecular diagnostic techniques, the study for the etiology of leukemia has been entering the era of the molecular biology.Molecular techniques for leukemia diagnosis, prognosis and individualized therapy are used widely, becoming one of the necessary routine tests for patients with leukemia. So far, molecular techniques for leukemiaincluding cytogenetic diagnosis, molecular genetics, molecular diagnostics based on PCR, mutation detection, as well as a variety of next-generation sequencing, have played an important role in the diagnosis of leukemia, minimal residual disease monitoring, prognosis and targeted therapy.

Objective To observe the changes and the mechanism of bcl-6 expression in K562 cells inducing differentiation along different Myelocyte-lineage cells,and to investigate the relationship between expression of bcl-6 and directional differentiation of K562 cells.Methods Models of K562 cells inducing differentiation along megakaryocyte-lineage,erythrocyte-lineage and macrophagocyte- lineage were established with inducers TPA(tetradecanoylphorbol 13-acetate),Hu(hydrozyurea)and HMBA(hexamethylene bisacet- amide)respectively,Western blot assay was applied to detect the expression of bcl-6 in K562 cells before and after the induction.Mean- while,PCR,cloning and direct DNA sequencing were used to identify mutations in the 5'regulatory region of bcl-6 in K.562 cells induced with TPA.Results Up-regulation of bcl-6 expression was found only in K562 cells inducing differentiation along megakaryocyte-line- age,and mutation of noncoding regulatory region of bcl-6 gene was not found.Conclusions bcl - 6 may be the key gene to regulate K.562 cells directional differentiation along different myelocyte-lineage ceils,the up-regulation of bcl-6 expression could play an important role in K562 cells inducing differentiation to megakaryocydte-lineage,and the change of bcl-6 expression might be not related with the mutation of the gene's 5'regulatory region.

[Objective]To analyze the clinical and biological characteristics of suspected malignant thyroid nodules associated with Hashimoto thyroiditis .To summarize different characteristics of benign and malignant nodules,diagnosis and treatment of suspected malignant nodules associated with Hashimoto's thy-roiditis. [Methods]Surgical y and pathological y confirmed, 58 cases of suspected malignant thyroid nodules associated with Hashimoto's thyroiditis were retro-spectively analyzed with clinical and pathological data. The differences of gender, age, number of nodules, calcification, and thyroid hormone and thyroid an-tibodies levels between malignant and benign nodules were compared from January 2009 to December 2011 .[Results] The average age of malignant thyroid nodules coexisting with HT group was significantly lower than that of benign nodules coexisting with HT group( P<0.05). The proportion of nodular calcifi-cation in malignant thyroid nodules coexisting with HT group was significantly higher than that in benign nodules coexisting with HT group( P<0.05). Pre-operative TSH and anti-TG levels in malignant thyroid nodules coexisting with HT group were significantly higher than that in benign nodules coexisting with HT group. Preoperative FT3, FT4, anti-TPO levels, sex ratio and number of lesions between the two groups were not statistical y significant. [Conclu-sions] The key point of preoperative diagnosis:patients of malignant thyroid nodules coexisting with HT are associated with youth, calcified nodules, elevated serum TSH and anti-TG levels.

Objective To analyze the long term efficacy of sodium hyaluronate on the treatment of moderate knee osteoarthritis. Methods From January 2015 to December2016 year in our hospital , 84 patients with moderate knee osteoarthritis were participated in the study, and were randomly divided into two groups, 42 cases in each group. The control group were given oral glucosamine sulfate . Based on the treatment of the control group, the observation group were received sodium hyaluronate . The long-term effect in the two groups were compared. Results The excellent rate of knee joint function recovery was 80.95% in the observation group, and 54.76% in the control group, the difference in the two groups had statistically significant, P<0.05; Three months, nine months, and one years after treatment, the knee joint function Lysholm scores in the observation group were significantly higher than those in the control group; Three months, nine months, and one years after treatment, AIMS quality of life score in the observation group was significantly lower than those in the control group. Conclusion The long-term effect of sodium hyaluronate in the treatment of moderate knee osteoarthritis is obvious. It can help the knee joint function to be improved significantly, and promote the quality of life of patients significantly improved. It is worth to be widely applied.

Objective To evaluate the images of MRCP acquired by adjusting 0.3 Tesla MR unit heavy T 2-weighted scanning parameters and altering scanning angle and diagnostic correctivity to biliary obstructive disease.Methods Routine MR T 1WI,T 2WI scanning were performed axial in 50 cases of patients with biliary obstruction.All of them were divided into two groups,20 cases of them were scanned coronal with FSE T 2-weighted fixed parameters,30 cases of them were scanned with altering scanning angle,increasing scanning slices,decreasing distance of two near slices,reducing signal collection times(NSA),shortening scanning time.Results The acquired images through adjusting FSE T 2-weighted scanning parameters were visualized clearly.The boundary of cholangiopancreatie ducts were showed clearly.The display rate of biliary and pancreatie ducts was elevaled from 20% to 83.3%.The accuracy of it for evaluating the causes of obstruction was increased from 88.9% to 93.3%.The accuracy of it in the detection of the location of bile duct obstruction was 100%.Conclusion Through adjusting scanning purameters low field MRCP is very helpful in improved images quality and reflecting veliable signs of biliary and pancreatie duct obstruction disease combined with MRI T 1-weighted T 2-weighted message.This method can increased the diagnostic accuracy of the causes of obseruction and supply the reliable ground for clinical treatment.

Objective To investigate the biological characteritics of adult animal hepatocytes induced by phenobarbital sodium(PBS) in vivo,and to study the potential value of biological artificial liver of effective hepatocytes.Methods 12 adult male mice,are yandomly divided in to preinducing group and controll group.The preinducing group are intraperitoneally injected PBS per day,45mg/kg for 7 times in total;the controll ware injected NS.after that,we detected the blood serum TP,BUN,CHOL,HDLC.And the same amount of isolative hepatocytes was developed after being developed 48h;MTT was used to investigate the proliferation of hepatocytes after being developed 24h;chromosome was investigated to observe the cell division;and the survival deadline and morphology was also investigated.Results The TP had remarkable difference between the two groups(t=2.678,P

Objective To evaluate the effect of 3-dimensional conformal radiotherapy (3D CRT) and prognostic factors for cervical and upper-thoracic esophageal cancer. Methods Between July 1998 and July 2001, 33 patients with cervical and upper-thoracic esophageal cancer were treated with 3D CRT(2?Gy per day, 5 sessions a week to a total dose of 66-68?Gy over 6-7 weeks). Acute toxicities and survival rates were evaluated by Kaplan-Meier method and prognostic factors were analyzed by Cox proportional hazard model. Results The 1-, 2-, 3-year local control rates were 87.9%, 75.8%, 45.5% respectively. The 1-, 2-, 3-year disease-free and overall survival rates were 72.7%, 60.6%, 30.3% and 78.8%, 66.8%, 44.2% respectively. GradeⅠ-Ⅱ acute esophagitis and bronchitis were the most common radiation side effects. Multivariate analysis revealed that the depth of primary tumor invasion, regional lymph node metastasis and tumor length were independent prognostic factors (P