The formation of Staphylococcus epidermidis biofilm on the surface of medical biomaterials may resist the antibiotics treatment and cause chronic infection,which has become a research focus in recent years.Multiple genes constitute complex regulatory network which affect the biofilm formation,and play different roles in the different stages of biofilm formation.Accessory gene regulator (agr) is one of the most important genes in the process of biofilm formation.The process of bacterial biofilm formation,research status of regulation mechanism of agr system and its related genes in the formation of biofilm are reviewed,to provide reference of using agr as a target for the treatment of staphylococcus epidermidis biofilm related infections.

Lycopene—a kind of important active compound of caroteinoids, is greatly beneficial to human health with its diverse biological functions. With the elucidation of lycopene biosynthetic pathway and cloning genes of relative enzymes from microorganisms, it is possible to regulate lycopene biosynthesis via genetic engineering. The biosynthesis pathways of lycopene and gene cloning of lycopene biosynthetic enzymes in microorganisms were reviewed, and gene engineering strains documented in previous works including: E.coli and yeast constructed by genetic recombination, mold strains enhanced the ability of producing lycopene by gene manipulation were summarized. At last, compared with the present methods, the problems existed in the process of construction were pointed out.

Aim To study the effects of preconditioning with desflurane, sevoflurane and isoflurane on adenosine triphosphate (ATP) in anoxia-reoxygenation myocardial cells. Methods Rat ventricular myocytes, cultured for 4～5 days, were randomly allocated to five groups: Control group, anoxia-reoxygenation group and groups preconditioned with 1.5 MAC desflurane, sevoflurane or isoflurane following anoxia-reoxygenation. The content of intracellular ATP ,the activities of lactic dehydrogenase(LDH) and creatine kinase(CK), and the cell viability were measured at the end of experiment.Results Preconditioning with 1.5 MAC desfllurane, sevoflurane or isoflurane significantly attenuated the great reduction in ATP and cell viability and the increase of LDH and CK caused by anoxia-reoxygenation. There was a positive correlationship between ATP and cell viability,and a negatiue correlationship between LDH and CK (r was 0.83, -0.87 and -0.82 respectively, P

OBJECTIVE: To summarize the study of bone marrow cell infusion-induced immune tolerance. METHODS: The Pubmed database was researched using the computer for articles published from January 2000 to December 2008 using the key words of "bone marrow cells, transplantation immune tolerance" in English. Simultaneously, Chinese Biomedical Literature Database and China Journal Full-text Database were retrieved for articles published from January 2000 to December 2008 using the key words of "bone marrow cells, immune tolerance" in Chinese. Besides, Organ Transplantation, Transplantation Immune Tolerance and Conference Proceedings of English and Chinese were retrieved by hand. Inclusion criteria: relevant mechanism of immune tolerance; scheme of bone marrow cell infusion-induced immune tolerance; advantages and disadvantages of bone marrow cell infusion-induced immune tolerance; articles in the same circle published in recent years or in authorized journals. Exclusion criteria: repetitive studies or irrelevant articles. RESULTS: Mechanism of immune tolerance comprised cleaning, inability, regulation or inhibition, and ignorance. The scheme of bone marrow cell infusion-induced immune tolerance mainly contained bone marrow cell infusion combined with myeloablative pretreatment, bone marrow cell infusion combined with non-myeloablative pretreatment, pretreatment with immunosuppressive drug or chemotherapeutics, pretreatment of costimulatory signaling blockage, bone marrow cell combined with mesenchymal stem cell infusion. Bone marrow cell infusion-induced immune toleranca could induce long-lasting stable specific immune tolerance by effective immune tolerance mechanism, and had been an effective main method for inducing transplanted tolerance. CONCLUSION: Up to now, clinical immune tolerance is still uncontrollable and facultative. Bone marrow cell infusion-induced stable immune tolerance can develop a new space for organ transplantation.

RNAi is a process of effective gene silencing. Human papillomaviruses 16 (HPV16), as the most prevalent genotype of cervical cancer, encodes the E6 and E7 oncogenes, which is pivotal for maintenance of malignant phenotypes. Recently, some significant advances have been obtained in RNA interfering effect on HPV16 E6/E7. In vitro, it has been developed more effective vector systems and screened for more specific targeted sequences. In vivo, the corresponding animal models have been established, which lay a good foundation for the clinical research.

Benzene ; Benzene Derivatives ; Bile ; Chromatography, Gas ; Gallbladder ; Gas Chromatography-Mass Spectrometry ; Humans ; Toluene

Adult ; Carcinosarcoma ; pathology ; Female ; Heart Neoplasms ; pathology ; Humans ; Lung Neoplasms ; pathology ; Myocardium ; pathology

Objective To investigate the relationships between serum concentration of RBP-4 and the parameters of inflammatory, lipid metabolism, insulin resistance in patients with T2DM. Methods 71 patients newly diagnosed with T2DM and 34 subjects with normal glucose tolerance (NGT) were enrolled in this cross-sectional study. Additionally, another subset analysis was performed. Subjects were divided into normal weight (NW) and overweight or obesity (OW/OB) group on the basis of BMI. Serum RBP-4 was measured with ELISA. Serum concentrations of hs-CRP, free fatty acids (FFA), triglyceride (TG), total cholesterol (TC) and insulin were measured in fasting status. Insulin resistance was assessed by HOMA-IR. Results Ln (HOMA-IR) and the concentrations of TG, FFA, In(hs-CRP) in T2DM were significant-ly higher than that of NGR group[1.20±0.38 vs 0.76±0.34,(2.74±2. 20)mmol/L vs (1.88±1.41),(0. 80±0. 29)mmol/L vs (0.61±0.22)retool/L,0.62±1.00 vs -0. 17±1.07] . InRBP-4 showed a positive relationship with In (HOMA-IR) ( r =0. 382, P <0. 05), but no association with TC, TG, FFA and In(hs-CRP). In the group of T2DM, InRBP-4 showed a positive relationship with FFA ( r =0. 242, P <0.05) and In (hs-CRP) ( r =0.346, P <0.01), but no association with TC, TG and In (HOMA-IR). There were no relationships between InRBP-4 and In (HOMA-IR), TC, TG, FFA and In (hs-CRP)in NW, while in OW/OB group, InRBP-4 showed a positive relationship with In (HOMA-IR) ( r =0. 290,P < 0. 05 ) and In (hs-CRP) ( r = 0. 295, P <0.05 ), but no association with TC, TG and FFA. In a mul-tiple linear regression analysis, In( hs-CRP), TC, TG, FFA or In(HOMA-IR) was not the independent de-terminant of InRBP-4 in any group. Conclusion In patients with T2DM, InRBP-4 is positively correlatedwith In (hs-CRP) and FFA, and it may be a new marker of inflammation.

The solid pseudopapillary tumor of pancreas (SPT) is a rare pancreatic tumor with low malignant potential. It primarily affects young women. The clinical characteristic is nonspecific, but the pathological characteristic is distinct. The tumor consists of both cystic and solid component. The typical histopathological appearance of SPT is the pseudopapillary structure with a fibrovascular surrounded by several layers of epithelial cells.Only a few SPTs present invasive behaviors. The tumor cells express a wide range of immunohistochemical markers. The pathogenesis is associated with the Wnt signaling pathway, which is changed by β-catenin, Pl20-catenin, adenomatous polyposis coli gene( APC), the cyclin-dependent kinase inhibitors p21 and p27.

Against the backdrop of ongoing healthcare system reform and escalating competitions among hospitals in China,more and more specialists and scholars on hospital administration begin to focus their studies on the theories and practice of hospital flows.Methodology frequently called into play in such study include out-patient flow refom,progressive flow improvement,and attention to management and service.Discussed in this paper are the advantages and disadvantages of these three methods as a reference for an appropriate choice by hospitals at large.