Objective To investigate the effects of MTA1 knock down on migration and invasion of NPC cell 5-8F in vitro. Methods RNAi (Si-MTA1-01 and Si-MTA1-02) that can transiently silenced MTA1 was designed, synthesized and transfected into 5-8F cells by lipofectamine 2000. Control group (transfection with nonsense sequence) was also estab-lished. The efficiency of MTA1 depletion was determined by q-PCR and Western blot. Wound-healing assay ,Matrigel inva-sion assay and thesolid-phase adhesion assay were performed to investigate the effect of MTA1 knockdown on 5-8F cell me-tastasis. Results Transiently knock down of MTA1 decreased MTA1 transcription and expression in 5-8F cells compared to shRNA-con cells, showing by Real-time PCR and western blot. The invasion and migration of the cells transfected with siRNA-MTA1 were much weaker than the control group (P＜0.05). Conclusion silencing MTA 1 gene can effectively in-hibit the migration and invasion of nasopharyngeal carcinoma cell, and might be a promising target for NPC treatment.

Objective To analyze the reasons of perioperative hypoxia in Stanford A aortic dissection,and summarize its management strategies.Methods From Dec.2005 to Jul.2011,sixty four patients underwent surgery for acute type A aortic dissection,of which 9 cases were with chronic dissection and 55 cases with emergent ones.Preoperative oxygen fraction ratio( PaO2/FiO2 )in 51 cases was lower than 200 mm Hg.All of them underwent the surgery with the help of deep hypothermia cardiac arrest technique.Results Three cases died.Thirty-three cases could not live without ventilation during the first 72 h because of continuous hypoxia ( PaO2/FiO2 ＜ 200 mm Hg).One case underwent tracheotomy and auxiliary ventilation for 9 days.The rest were live without ventilation after auxiliary ventilator for 72 - 120 hrs.The data showed that postoperative hypoxia was related to preoperative hypoxia (oxygen fraction ratio ＜ 200 mm Hg),BMI,acute onset,hypothermia cardiac arrest time,and transfusion more than 3000 ml ( P ＜ 0.05 ).Conclusion Great attention should be paid to the perioperative hypoxia-related factors in Stanford A dissection,which will be helpful to improve prognosis.

AIM:To investigate whether hydrogen sulfide ( H2 S) protects the hearts against inflammatory re-sponses induced by acute myocardial ischemia in isolated rat hearts .METHODS: Rat acute myocardial ischemia injury was induced by ligation of the left anterior descending coronary artery for 4 h, and the normal perfusate was replaced with NaHS (5 μmol/L, 10μmol/L and 20 μmol/L) perfusate accordingly in NaHS groups 2 h after ischemia.The changes of cardiac function in the myocardial ischemic injury rats were observed .The mRNA expression of TNF-α, IL-1β, IL-6, IL-10 and ICAM-1 was detected by real-time PCR.The protein level of nuclear factor-κB ( NF-κB) in the myocardial tissues was detected by Western blotting .RESULTS:The cardiac function in ischemia group was lower than that in sham group (P<0.01).Compared with ischemia group, perfusion of NaHS resulted in the improvement of the cardiac function (P<0.05 or P<0.01).Compared with sham group, the mRNA expression of TNF-α, IL-1β, IL-6 and ICAM-1 in the cardiac tissues was significantly increased , and the mRNA expression of IL-10 in the cardiac tissues was significantly decreased in ischemia group (P<0.01).Compared with ischemia group , the perfusion of NaHS significantly decreased the mRNA ex-pression of TNF-α, IL-1β, IL-6 and ICAM-1 ( P<0.05 or P<0.01 ) .The perfusion of NaHS at concentrations of 10μmol/L and 20μmol/L significantly increased the mRNA expression of IL-10 (P<0.01).The protein level of NF-κB in ischemia group was markedly higher than that in sham group (P<0.01).Compared with ischemia group, the perfusion of NaHS at concentrations of 10 μmol/L and 20 μmol/L significantly decreased the expression of NF-κB ( P<0.05 or P<0.01).CONCLUSION:H2S protects the hearts against acute ischemia injury through inhibition of NF-κB activation and subsequent down-regulation of NF-κB-dependent inflammatory gene expression .

38 cases of Benign Monoclonal Gammopathy (BMG) representing 17.9% were screened from 212 cases of M-proteinemia by laboratory examinations. Among the 38 cases, 17 cases had increase of IgG, another 17 cases of IgA and 4 cases of IgM. Their average M-proteins were 1.42, 0.88 and 1.84 g/dl respectively.The salient points of differential of benign or malignant M-proteinemia were also discussed. The recommended sequential laboratory diagnostic procedure of BMG were as follows: tatol serum protein determination, plasma protein zone electrophresis, urine protein analysis, immunoglobulin quantitation and immunoelectrophresis or selective electrophresis.

Aims To observe the changes of endoge-nous hydrogen sulfide/cystathionine-γ-lyase (H2 S/CSE)system and to study the effects of H2 S on cardiac function,H2 S/CSE and myocardial infarct volumes in acute myocardial ischemic injury in isolated hearts of rats.Methods The myocardial ischemic injury model was established by the ligation of coronary artery.The hemodynamic parameters,such as the left ventricular developed pressure (LVDP),±dp/dtmax and coronary arterial flow(CF),were respectively recorded to evalu-ate the cardiac function.The content of H2 S and the activity of CSE in cardiac tissue were detected respec-tively at each time point after ischemia.Infarct vol-umes in isolated rat hearts were determined by dual staining with Evans-blue and TTC.Results (1 )Com-pared with those of the sham group,LVDP,±dp/dtmax and CF were significantly decreased at 30 min,1,2,3, 4 h after ischemia(P<0.01),there were no statistical-ly significant differences in the content of H2 S and the activity of CSE in cardiac tissue at 3 0 min after ische-mia.But during the periods from 1 h to 4h after ische-mia,the content of H2 S and the activity of CSE in car-diac tissue were significantly decreased,the infarct volumes were greatly increased compared with those of the sham control group (P<0.05 or P<0.01 ).(2) Compared with those of the ischemia 4h group,LVDP, ±dp/dtmax and CF were significantly increased in the NaHS low,middle and high dose groups (P<0.05 or P<0.01),the content of H2S and the activity of CSE in cardiac tissue were significantly increased in the NaHS low,middle and high dose groups(P<0.05 or P<0.01 ),and the infarct volumes were significantly decreased in NaHS middle and high dose groups(P<0.01 ).Conclusion H2S and CSE are involved in myocardial ischemic injury in isolated hearts of rats. Administration of NaHS could enhance the activity of CSE,increase the content of H2 S,and reduce infarct volumes.It could be suggested that H2 S has cardiopro-tective effects on acute myocardial ischemic injury.

Aim To investigate whether hydrogen sul-fide ( H2 S ) inhibits cardiomyocyte apoptosis induced by acute myocardial ischemia in isolated perfused rat heart. Methods The myocardial ischemia injury model was replicated with Langendorff isolated perfused rat heart, and the left anterior descending coronary ar-tery was ligated for 4 h. 40 male SD rats were divided into five groups randomly: sham group, ischemia group, and NaHS groups (5,10,20μmol·L-1). The segmental heart samples were used for HE staining. Cardiomyocyte apoptosis was detected with TUNEL as-say. The expressions of caspase-3 and Cyt-C in hearts were determined with Western blot analysis. Results Myocardial cells were found to show serious disorder and coagulated zonal necrosis under light microscope, the apoptotic rate of cardiomyocytes and the expression of caspase-3 and Cyt-C were significantly increased af-ter ischemia for 4h. Perfusion of NaHS resulted in more clear cell morphology and milder pathologic chan-ges of myocardiocytes according to the HE staining a-nalysis, and the significant decrease of expression of Cyt-C. After perfusion of 10,20 μmol·L-1 NaHS,the apoptotic rate of cardiomyocytes and the expression of caspase-3 were significantly decreased. Conclusion H2 S has certain protective effects on acute myocardial ischemic injury in isolated perfused rat heart via inhibi-ting cardiomyocyte apoptosis.

Objective To analyze the papers published by domestic scientific research workers in order to improve the academic level of their papers. Methods The papers published by over 3000 domestic scientific research workers were investigated with questionnaires. Their motives to publish papers and the relation between the number of pub-lished papers and the assessment of their performance were analyzed. Results The number of papers published by domestic scientific research workers was increased. However, their academic level was to be further improved. Over quantization of the assessment mechanisms for scientific research increased the external motives to publish papers, thus leading to the insufficient internal motives of them to engage in scientific research. Conclusion A loose and comfortable academic environment should be created for the scientific research workers in order to initiate their in-ternal motives to publish papers. Over quantization of the assessment mechanisms for scientific research should be changed in order to reduce the external motives of domestic scientific research workers to publish papers. Innovative and cultural environment should be created in order to improve the soft power of scientific research in our country.

Shanghai began to strengthen the community health service system in 1997 , and had officially en-tered the period of “connotation construction” with the core policy of family doctor system in 2011 after the period of“service framework and network establishment” and“operational mechanism reform”. Through summarizing the poli-cy files related the family doctor system and based on 2013 report on monitoring and evaluation of family doctor system in Shanghai, the paper presented the progress of the system from aspects of system coverage, signature relationship, service mode and operational mechanism, and analyzed the development bottlenecks of the system from aspects of the policy itself, service principal, service supervision and service objects. Finally, the paper proposed some suggestions in order to give some references for further development of national general practitioner system.

Laminin(LN) and hyaluronie acid (HA) are extracellular matrix in liver. The effects of LN and HA on human fetal liver cells proliferation and collagen synthesis were observed and serum levels of LN and HA were assayed m patients with liver diseases by an enzyme immunoassay method. Both LN and HA had a significant effect on the inhibition of cell proliferation and collagen production. However, serum levels of LN and HA were significantly increased in liver cirrhosis comparing with healthy controls and with patients with non-liver diseases. The results suggest that LN and HA may play a role in the feed-back inhibition mechanism in liver fibrogencsis, and assay of LN and HA in serum may be useful to the diagnosis of liver fibrosis.

Chinese Association for Science and Technology in conjunction with Beijing Institute of Biotechnology and Beijing Science and Technology Consulting Center carried out a survey of the research publications by science and technology professionals in China in year 2014.Based on the overall survey data,we selected the group of medical professionals,including medical organization personal according to the classification of different types of units and health care personals according to the job type,and analyzed the status of research publications,including the number of papers published,motivation,stress,evaluation mechanisms,journal selection,and compared with other classification groups.