Angiogenesis plays an important role in tumor growth and metastasis,anti-angiogenic therapy is becoming the center point in tumor therapy,endostatin is a recently discovered endogenous inhibitor of angiogenesis.Endostatin can specifically target endothelial cells,inhibiting proliferation and migration and inducting apoptosis.This review describes the mechanism of endostatin in inhibiting angiogenesis,induction of apoptosis in tumor cells and clinical trials.

Objective To compare the interventional operation room air disinfection effect of circulatingair disinfection method by an ultraviolet air disinfector with that of air-purifying screen disinfection method in order to provide scientific basis for formulating optimal measures to control hospital infection.Methods By using plate natural sedimentation method,air sampling was conducted at different period of time after the start of air disinfection in operation room.The air sterilization results of the two disinfection methods for the operation room where several consecutive interventional procedures had been performed were compared.Results Both disinfection methods had better preoperative air disinfection effect (P＞0.05).When ultraviolet disinfection method was used,the differences in colony detection results among the air samples that were collected at different time periods were statistically significant (P＞0.01).With the increasing of time after the start of air disinfection,the number of bacterial colonies was increased.If air-purifying screen disinfection method was employed,the air in the operation could be continuously and dynamically purified,the number of bacterial colonies determined in the whole course of operation met the national hygienic standard for air disinfection.Conclusion Continuous air purification by using air-purifying screen disinfection method can shorten the interval between consecutive surgeries,meanwhile,the operation room can be kept in a condition for any emergency surgery at anytime,besides,nosocomialtion can be effectively prevented.

BACKGROUND:Under mitomycin C treatment, feeder cells appear to have restricted proliferation, but they are stil able to secret different cytokines. Non-mesenchymal stem cells from the bone marrow and secreted factors in plasma maintain the micro-environment suitable for the growth of mesenchymal stem cells that can improve the yield of mesenchymal stem cells.
OBJECTIVE:To study the biological characteristics of C57 mouse bone marrow mesenchymal stem cells isolated using a whole bone marrow adherent culture technique.
METHODS:Using the whole bone marrow adherent culture technique, purified and amplified C57 mouse bone marrow mesenchymal stem cells were harvested. cellproliferation kinetics, immune cellsurface markers, multiple differentiation potential and cellcycle were detected.
RESULTS AND CONCLUSION:Using the whole bone marrow culture, mouse bone marrow mesenchymal stem cells were harvested and capable of adhering to the plastic culture vessel. The obtained cells expressed CD45, CD105 and Sca-1, but were negative for CD34, CD33 and C-kit. The doubling time was (57.11±1.5) hours. The cells could be induced to differentiate into osteoblasts, adipocytes and chondrocytes. The cellcycle analysis showed that 64%of cells were in G 0-G 1 phase. These indicates that C57 mouse bone marrow mesenchymal stem cells isolated using a whole bone marrow adherent culture technique have biological characteristics of mesenchymal stem cells.

To improve the efficiency of targeted gene replacement (TGR), a dual screen (DS) system with gusA gene as negative selective marker (GUS-DS) was developed in Magnaporthe oryzae. First, we tested the endogenous beta-glucuronidase (GUS) activities of 78 fungal strains. All tested strains were GUS-, only with 3 exceptions. Whereas, after the gusA being introduced in, M. oryzae, Fusarium oxysporum and Colletotrichum lagenarium acquired high GUS activities. The gusA is thus usable as a selective maker in fungal species. With gusA as the negative marker, HPH gene as the positive marker, and the peroxisomal targeting signal receptor genes MGPEX5 and MGPEX7 as 2 instances of target genes, we established the GUS-DS system. After transformation, we collected the transformants from hygromycin B screen media and then tested the GUS activities of them. The GUS- ones were selected as potential mutants and checked in succession by PCR and Southern blotting to identify the true mutants and calculate the efficiency of GUS-DS. As a result, GUS-DS improved the screen efficiency for delta mgpex5 from 65.8% to 90.6%, and for delta mgpex7 from 31.2% to 82.8%. In addition, we established a multiple PCR (M-PCR) method for mutant confirmation. By amplifying the different regions at the targeted locus, M-PCR differentiated the wild type, the ectopic transformants and the mutants effectively and rapidly, and had the same reliability as Southern blotting. In conclusion, GUS-DS and M-PCR are useful tools to improve the efficiency of TGR and would be helpful for fungal genomics.
Escherichia coli ; enzymology ; genetics ; Gene Expression Regulation, Enzymologic ; Genes, Fungal ; Glucuronidase ; genetics ; Magnaporthe ; genetics ; Mutagenesis, Insertional ; methods ; Mutation ; Recombination, Genetic ; Transformation, Genetic

It is difficult to define whether the thymoma is benign or malignant because of its morphological heterogeneity. The structure of the mediastinum is complex,and the tumor′s invasion of different structures will have different effects on the prognosis of the patients. These characteristics make it difficult for clinicians to assess their prognosis. The histology classification and clinical staging were used to determine the prognosis. But the existing staging types are complex and are not well matched with the prognosis.

Periodontitis imparting the increased risk of atherosclerotic cardiovascular diseases is partially due to the immune subversion of the oral pathogen, particularly the Porphyromonas gingivalis (P. gingivalis), by inducing apoptosis. However, it remains obscure whether accumulated apoptotic cells in P. gingivalis-accelerated plaque formation are associated with impaired macrophage clearance. Here, we show that smooth muscle cells (SMCs) have a greater susceptibility to P. gingivalis-induced apoptosis than endothelial cells through TLR2 pathway activation. Meanwhile, large amounts of miR-143/145 in P.gingivalis-infected SMCs are extracellularly released and captured by macrophages. Then, these miR-143/145 are translocated into the nucleus to promote Siglec-G transcription, which represses macrophage efferocytosis. By constructing three genetic mouse models, we further confirm the in vivo roles of TLR2 and miR-143/145 in P. gingivalis-accelerated atherosclerosis. Therapeutically, we develop P.gingivalis-pretreated macrophage membranes to coat metronidazole and anti-Siglec-G antibodies for treating atherosclerosis and periodontitis simultaneously. Our findings extend the knowledge of the mechanism and therapeutic strategy in oral pathogen-associated systemic diseases.
Animals ; Mice ; Endothelial Cells ; Toll-Like Receptor 2 ; Macrophages ; Apoptosis ; Atherosclerosis ; Myocytes, Smooth Muscle ; MicroRNAs