OBJECTIVE:To study the effects of baicalin on human osteosarcoma MG63 cells apoptosis and the expression of MMPs. METHODS:Treated with 0(blank control),5,10,20,40,80,160,320 μg/ml baicalin for 24 h,the survival rate,the expression amount of MMP-2 and MMP-9 were detected,and IC50 was calculated. Cell apoptosis was observed. RESULTS:Com-pared with blank control group,after treated with baicalin,survival rate of MG63 cells decreased,while apoptotic amount in-creased,the expression amount of MMP-2 and MMP-9 decreased;there was statistical significance in the expression amount de-crease of MMP-2 and MMP-9 in MG63 cells after treated with 320 μg/ml baicalin(P<0.05);IC50 was(40.21±9.20)μg/ml,all responses were in concentration-dependent manner. CONCLUSIONS:Baicalin can inhibit the proliferation of MG63 cells,induce cell apoptosis,and inhibit the expression of MMP-2 and MMP-9 in cells under high concentration.

Objective To investigate the role and feasibility of tumor necrosis factor(TNF) and/or interferon(IFN) in comprehensive treatment of tongue cancer in vitro and explore a new pathway about clinical treatment of tongue cancer . Methods The role of TNF and/or IFN in tongue cancer cell line (Tca 8113) growth and their effect on chemotherapy & radiotherapy of Tca8113 were detected by MTT-assay in vitro.Results ⑴There was a obvious volume-effect relationship in inhibitory effect of TNF or IFN on tongue cancer cell line; when TNF combind with IFN,their cytotoxity enhanced significantly than only TNF or IFN. ⑵TNF & IFN have enhanced the cytotoxities of low dose DDP,PLM and Taxol on Tca 8113 cell line.⑶TNF obviously enhanced the inhibition rate of radiotherapy(dosage:2～8Gy)on Tac 8113 cell line(P

Lactobacillus can maintain the stability of microbiological environment in intestine and its surface layer protein controls the biological function of intestinal epithelia cells. The mechanism of adhering had been studied. In this article, we review the progress of surface layer protein in the study of the isolation, identification and the biological reaction with the intestinal epithelia cells .

With the establishment of HPLC and LC-MS methods to determine the related substances and the content of active pharmaceutical ingredient (API) in ipratropium bromide aerosol products, several packing material-related impurities were identified, including antioxygen BHT and antioxygen 2246. Results showed that these leachable additives from the packing materials may present at a relative high level in the drug solution, and the low content of API in the drug products is usually due to the adsorption of the packing material as well as the leaking of contents. The current available assay methods for the control of ipratropium bromide aerosol products are often lack of specificity and unable to assure the drug quality effectively. To meet the increasing attention on the regulations of drug packing materials, our research would be a pilot study, indicating that the inappropriate packing materials could cause the migration and adsorption of the active ingredients, and the importance to have compatibility studies between packing materials and drugs.

Diffusion tensor imaging (DTI)can reflect the brain structure and development more quantitatively and intuitively than conventional magnetic resonance sequence by obtaining the diffusion properties of water molecules. In neonatal brain developmental research,DTI could be used to study the developmental regularities of white matter tracts and cerebral structure deformity.It can also help to explore the relationship between white matter microstructure and neurodevelopmental outcome.In the study of brain injury,including premature white matter injury,hypoxic ischemic encephalopathy,neonatal stroke,and so on,DTI can diagnose the brain microstructure injury precisely,evaluate the ef-fectiveness of interventions and predict the long -term neurodevelopmental outcome.DTI may have good prospect in re-search and clinical application on neonatal brain development and injury.

As a new therapy in past twenty years,biological agents have been approved for the treatment of inflammatory bowel disease (IBD). However,biological agents currently used for IBD treatment require intravenous or subcutaneous injections,and some require infusion under close observation. Therefore,it is of positive clinical significance to find a safe and effective oral biological agent. This article reviewed recent advances in study on novel oral biological agents in the treatment of IBD.

Exons encoding the variable regions of the light and heavy chain of the murine McAb HIT3a against CD3 antigen were isolated from HIT3a gene library and inserted into mammalian expression vectors containing the human K and y1 region exons. The chimeric genes were transfected into murine SP2/0 hybridoma cells by Lipofectin. Antibody levels of culture supernatants from transfectomas ranged 21~32 ?g/ml. The chimeric antibodies bound specifically to human T cells and competed effectivelly with the parental anti-CD3 murine McAb for binding to CD3 antigen on human T cells. The ability to promote antibody-dependent cell-mediated cytolysis was significantly enhanced with the chimeric antibodies as compared with anti-CD3 murine McAb. The mitogenic activity of human T cells can be suppressed and enhanced by the anti-CD3 chimeric antibodies. The cytotoxicity to tumor cells and proliferation of human T cells mediated by the anti-CD3 chimeric antibodies were much higher than IL-2 alone. Chimeric HIT3a antibody is a clinically relevant, genetically engineering antibody with potential use in treatment of graft-versus-host disease in tranplantation, autoimmune diseases and some tumors.

For construction of anti-CD3 human/murine chimeric antibody genes, a selective first-strand cDNA synthesis from mRNA or RNA of murine McAb HIT3a was performed using murine Ig constant region primers, and then cDNA of heavy and light chain variable domains of murine immunoglobulin were amplified by PCR using a set of degenerated oligonucleotide primers. Using these cDNA fragments as probes, the L and H chain V region exons encoding the murine McAb anti-CD3 were isolated from the gene library of HIT3a DNA and inserted into mammalian expression vectors containing the human ? and yl constant region exons for construction of human/murine chimeric antibody genes.

The NOD protein family include NOD1 and NOD2,both of which recognize intracellular bacterial peptidoglycan,induce inflammation and promote host defense.In this review article,we summarize the research progress on NOD family,including signaling and regulation.We will also discuss their cellular localization and the role in host defense.Understanding on their physiological function will help shed light on pathogenesis on related diseases.

Objective The effect of oral L-Dopa on healing of the experimental mandibular defect of rabbits was studied.Method 52 rabbits were assigned randomly to experimental group and control group.After bone defect being made on mandible,rabbits had been given with L-Dopa in experimental group.Healing bone samples were adopted at 14,21,30,42,49 days after operation,observed x-ray and histological changes and calculated out the bone histomorphometric parameters.Results X-ray inspection indicated that bone defect of the experimental group had completed callus union from 30th day.But,a part of the defect of control group did not appear callus union radiologically.Histological examination had the same result.Bone histormorphometry examination exhibited that there was a significant difference between TBV of the experimental and the control group(P