Objective: To study the effect of siRNA on multidrug resistance1(MDR1) gene expression in KBv200 cells. Methods: MDR1-siRNA was synthesized and transfected into KBv200 cells.The MDR1 mRNA and P-gp were assayed by RT-PCR and flow cytometry.Cytotoxicity was determined by a tetrazolium-based chemosensitivity assay(MTT).Cellular accumulation of Dox was measured by fluorescence spectrophotometry. Results: MDR1-siRNA decreased MDR1 mRNA and P-gp expression(P

According to the base complementation, the principle antisense technology is the sequence specific binding of complementary antisense nucleic acids or their chemical modification to the nucleic acids in cells, resulting in the suppression or prevention of gene translation. For the treatment of cancer, a lot of antisense drugs have been designed, which target the genes involved in the pathogenesis of cancer. And some of them have been in clinical trials. The author reviewed the progress of the clinical trials of these antisense drugs.

Carcinoma ; drug therapy ; genetics ; metabolism ; pathology ; radiotherapy ; Desmoplastic Small Round Cell Tumor ; metabolism ; pathology ; Diagnosis, Differential ; Gene Rearrangement ; Head and Neck Neoplasms ; drug therapy ; genetics ; metabolism ; radiotherapy ; Humans ; Keratin-20 ; metabolism ; Keratin-7 ; metabolism ; Lymphatic Metastasis ; Male ; Mediastinal Neoplasms ; drug therapy ; genetics ; metabolism ; radiotherapy ; Melanoma ; metabolism ; pathology ; Neuroectodermal Tumors, Primitive ; metabolism ; pathology ; Nuclear Proteins ; genetics ; metabolism ; Oncogene Proteins ; genetics ; metabolism ; Oncogene Proteins, Fusion ; genetics ; metabolism ; Rhabdomyosarcoma ; metabolism ; pathology ; Thymus Neoplasms ; drug therapy ; genetics ; metabolism ; radiotherapy

ObjectiveTo investigate the effects of hyperbaric oxygen therapy on T-lymphocytes 1 and cytokines including IL-6, IL-10 and TNF-α asindicators well representing immune function and inflammation in normal rats and rats with systemic inflammatory response syndrome. Methods Forty Sprague-Dawley male Rats were randomly ( random number) divided into five groups.Rats of group A were treated by saline solution (0.9 ％ NaCl,5 mL/kg),and served as control group; rats of group B were treated with saline solution and hyperbaric oxygen therapy three times; rats of group C were treated with zymosan (500 mg/kg) ; rats of group D were treated with zymosan and hyperbaric oxygen therapy once; and rats of group E were treated with zymosan and hyperbaric oxygen therapy three times.At 24 hours after saline or zymosan administration,rats were sacrificed and blood samples were collected from the portal vein.CD3 +,CD4+,CD8+ cells were counted by flow cytometer,and plasma levels of IL-6,IL-10 and TNF-αwere measured by ELISA.The results were analyzed by one - way ANOVA and LSD post-hoc test.Results CD4 T cell of normal rats was decreased by hyperbaric oxygen (P＜0.01 ),CD4/CD8 T cell ratio was also decreased ( P ＜ 0.05 ).Of rats with zymosan administration,CD4 T cells and CD8 T cells were both decreased on a parallel (P＜0.01 ).A single one HBO and HBO for three times both raised the percentage of CD4 T cells which was significantly decreased by zymosan administration ( P ＜ 0.01 and P ＜ 0.05 ).In rats without hyper- inflammation,hyperbaric oxygen therapy showed a pro-inflammatory effect by elevating TNF-α (P＜0.01),IL-6 (P＜0.05) and reducing 1L-10 (P＜0.05).ConclusionsHBO reduces CD4 T cells in normal rats.HBO reduces the production of TNF-α,IL-6 and IL-10 during hyper- inflammation.HBO is pro - inflammatory in normal rats and minor SIRS rats withourt appreciable hyper-inflammation in circulation.

Objective To discuss the impact of zedoary turmerie oil(ZTO) injection over oncosis index and Bcl-2 expression of human ovarian cancer SKOV3 cell.Methods After ZTO injection acted on human ovarian cancer SKOV3 cells,the changes in the nucleus were observed by fluorescence microscope,oncosis index was counted by projection electron microscope,the situation of cell DNA breakage was observed by agarose gel electrophoresis,and cell Bcl-2 gene expression was observed by immunohistochemical method.Results After treated by ZTO injection for 48 hours,human ovarian cancer SKOV3 cells shows that oncosis cell was swelling in fluorescence microscope,the volume increased,the membrane area narrowed,the nuclear chromatin expansed.The oncosis index increased with dose-effect relationship,DNA electrophoresis showed diffuse type and Bcl-2 gene expression was down-regulated.Conclusion ZTO injection can increase oncosis index of human ovarian cancer SKOV3 cell with the concentration,and lower Bcl-2 gene expression,which may be one of the mechanisms of ZTO injection caused oncosis of SKOV3 cell.

Objective To study the influence of Mutouhui extracts on hemorheology of U14 cervical cancer mice.Methods The U14 cervical cancer mice were divided into Mutouhui extracts high,middle and low dose group,Cisplatin Injection group,model group and blank comparing group.The influence on hemorheology change was observed after being given the medicine.Results The high,middle dose group of Mutouhui extracts and Cisplatin injection group could reduce the blood viscosity of U14 cervical cancer mouse in different shear,and hemotcrit of the low did not obviously change,groups of Mutouhui extracts plasma viscosity changed slightly.Cisplatin Injection group could reduce the blood viscosity,but did not obviously affect to the plasma viscosity.Conclusion Mutouhui extracts can reduce the U14 cervical cancer mouse blood viscosity,and improve the indexes of hemorheology.

AIM: To study the effect of group Ⅱ and Ⅲ metabotropic glutamate receptors (mGluRs) agonists on 1-methyl-4-phenylpyridinium (MPP~+)-induced glutamate uptake inhibition in C6 glioma cells. METHODS: The glutamate uptake into astrocytes was measured by using radio-ligand binding assay method. RESULTS: It was shown that Group Ⅱ mGluRs agonist (2' S, 2' R, 3 ' R) -2- (2', 3 ' -dicarboxycyclopropyl) glycine (DCG-Ⅳ) (100 ?mol?L~(-1)) and Group Ⅲ mGluRs agonist L(+)-2-amino-4-phosphonobutyric acid (L-AP4) (100 ?mol?L~(-1)) significantly reversed MPP~+-induced glutamate uptake inhibition. Furthermore, the enhancement effects of DCG-Ⅳ and L-AP4 were blocked by their respective antagonists, (RS)-1 -Amino-5-phosphonoinan-1-carboxylic acid (APICA) and (RS)-?-methylserine-O-phosphate (MSOP). CONCLUSION: Group Ⅱ and Ⅲ mGluRs agonists produce neuroprotective effects by enhancing the activity of glutamate transporters.

Objective To synthesize a multiple antigenic peptide(MAP),observe its humoral immune response and evaluate its antifertility potential.Methods Based on fusogenic epitope mimic peptide and synthetic nonnatural Pan DR T Helper Epitope(PADRE),MAP antigenic peptides were designed and synthesized.After suspending with the equivalent Freund's adjuvant,the antigens were used to immunize the female C57BL/6 mice to evalutate their humoral immune response in animals and efficiency of specific antisera on inhibiting syncytial trophoblast fusion.Results The MAP peptide was successfully synthesized.After purified with HPLC,its purity reached 95%.After immunization,the highest level of specific IgG in mice serum was 1:1 024,and the corresponding antigen of human trophoblastic cell could be identified in the antisera.In presence of mice antiserum by 1:10 dilution,forskolin-induced intercellular fusion of BeWo choriocarcinoma cells decreased remarkably(P

AIM: To study the effects of group Ⅱ and Ⅲ metabotropic glutamate receptors (mGluRs) agonists on 1-methyl-4-phenylpyridinium (MPP+) -induced glutamate uptake inhibition. METHODS: The glutamate uptake into astrocytes was measured by using radio-ligand binding assay method,and the viability of astrocytes was investigated by MTT method. RESULTS: It was shown that MPP+(150, 200 ?mol?L -1 ) inhibited glutamate uptake into astrocytes,but produced no effect on the viability of astrocytes,and the inhibition rates were 58.3 % and 70.1 %,respectively. Group Ⅱ mGluRs agonist (2'S,2'R,3'R)-2-(2',3'-dicarboxycyclopropyl)glycine (DCG-IV) ( 0.1 ,1,10, 100 ?mol?L -1 ) and Group Ⅲ mGluRs agonist L(+)-2-amino-4-phosphonobutyric acid (L-AP4) (1,10, 100 ?mol?L -1 ) significantly reversed MPP+-induced glutamate uptake inhibition. CONCLUSION: MPP+ directly inhibits the function of glutamate transporters,and group Ⅱ and Ⅲ mGluRs agonists produce neuroprotective effects by enhancing the activity of glutamate transporters.

Objective: To determine the component of naphtha from Acorus tatarinowii Schott.which can pass through the blood-brain barrier. Methods: Naphtha in rat brain was analyzed by GC-MS after gastric infusion of naphtha. Results: The methylisoeugenol,elemicin, ?-asarone and ?-asarone were detected in rat brain. Conclusion: The resuscitative effect of naphtha is resulted from the comprehensive action of multiple components.