Objective To investigate the effect of gastrodin on rat vascular smooth muscle cell (VSMC) migration induced by platelet-derived growth factor-BB (PDGF-BB) and its possible mechanisms.Methods Enzyme digestion method wasused to obtain rataorticVSMCs and be purified bypassage.Immunofluorescence staining was used to identify VSMC marker proteins.A PDGF-BB induced cell migration model was established.Transwell chamber assay was used to evaluate the effect of gastrodin on PDGF-BB induced VSMC migration.Western blots were performed to detect the phosphohorylation levels of c-jun N-terminal kinase (JNK).Results The purity of primary cultured VSMC was more than 99％.The VSMC migrated number in the PDGF-BB group was 85.2 ± 3.486 per field.It was significantly more than 42.5 ± 1.927 per field in the control group (t =9.981,P＜0.001),and gastrodin was enable to make PDGF-BB induced the number of VSMC migration significantly reduce to 71.3 ± 1.783 per filed (t=3.550,P =0.002).Western blots analysis showed that gastrodin inhibited PDGF-BB induced JNK phosphorylation (0.190 ± 0.015 vs.0.190 ± 0.015; t =14.548,P =0.000).Conclusions Gastrodin inhibits PDGF-BB induced VSMC migration,its mechanisms may be associated with the inhibition of the JNK signaling pathway activation.

Objectives To investigate and evaluate the preventive and therapeutic effects of celecox ib,a selective cyclooxygenase-2(COX-2)inhibitor,on multiple colorectal adenorna and compare it with aspirin.Methods Ninty-six patients with colorectal multiple adenoma were randomly divided into A,B and C groups.Adenomas in all patients were removed with high-frequency eleetrocoagulation,electroexci- sion or argon plasma coagulation(APC)under colonoscopy.Then,group A were administered celecoxib 200 mg twice daily,group B aspirin 50 mg twice daily,group C served as control.Colonoscopy was per formed every 6 months in the first year,and every year in order to observe and evaluate the recurrence rate of adenoma and the side effects after the treatment.Results Twenty-seven patients in group A,26 pa- tients in group B and 27 patients in group C had completed the treatment.At the end of the treatment, on PP/ITT analysis,the cure rate of the eolorectal adenoma were 84.4%/100% ,78.1%/96.2% and 75.0%/88.9% in group A,B and C,respectively.During the first year of follow-up,there were 1 ,1 and 6 cases which were found recurrences of the adenomas in group A,B and C,respectively.The recurrence rates of coloreetal adenomas in group A(3.7%)and group B(4.0%)were significantly low er than that in group C(24.0%) (P＜0.05 and＜0.05,respectively).At the end of follow-up,the total recurrence rate of colorectal adenomas in group A(14.80%)and group B(19.2%)were significant- ly lower than that in group C(46.2%)(P＜0.05 and＜0.05).While the side-effective rate regroup A (3.3%)was significantly lower than that in group B(22.5%)(P＜0.05).Conclusions After re- section of the multiple colorectal adenomas,both the selective inhibitor of COX-2,celeeoxib and the non- selective inhibitor of COX-2,aspirin,may reduce its recurrence rate,but the former has a good tolerance and lower side-effects.

Hypoxia-induced 15-hydroxyeicosatetraenoic acid (15-HETE) is an essential mediator to constrict pulmonary arteries (PA). The signaling pathway involved in 15-HETE-induced PA vasoconstriction remains obscure. The aim of the present study was to test the hypothesis that hypoxic PA constriction induced by 15-HETE was possibly regulated by the extracellular signal-regulated kinase-1/2 (ERK1/2) pathway. PA ring tension measurement, Western blot and immunocytochemistry were used in the study to determine the possible role of ERK1/2 in 15-HETE-induced PA vasoconstriction. The organ bath for PA rings tension study was employed. Adult male Wistar rats were raised in hypoxic environment with fractional inspired oxygen (FIO2, 0.12) for 9 d. PA 1~1.5 mm in diameter were dissected and cut into 3 mm long rings for tension study. ERK1/2 up-stream kinase (MEK) inhibitor PD98059, which blocks the activation of ERK1/2, was used. The results showed that pretreatment of PD98059 significantly blunted 15-HETE-induced PA vasoconstrictions in the rings from hypoxic rat. Moreover, in endothelium-denuded rings, PD98059 also significantly attenuated 15-HETE-induced vasoconstriction. Phosphorylation of ERK1/2 in pulmonary arterial smooth muscle cells (PASMCs) of rat was enhanced evidently when stimulated by 15-HETE. Thus, the data suggest that ERK1/2 signaling pathway is involved in 15-HETE-induced hypoxic pulmonary vasoconstriction.
Animals ; Flavonoids ; pharmacology ; Hydroxyeicosatetraenoic Acids ; antagonists & inhibitors ; pharmacology ; Hypoxia ; physiopathology ; MAP Kinase Signaling System ; physiology ; Male ; Muscle, Smooth, Vascular ; cytology ; Myocytes, Smooth Muscle ; drug effects ; Pulmonary Artery ; cytology ; drug effects ; physiopathology ; Rats ; Rats, Wistar ; Vasoconstriction ; drug effects

Camptothecin is a strong anti-tumor compound isolated from Camptotheca acuminata. One of the most important way for the production of Camptothecin is by cell cultures of Camptotheca acuminata. The effect of Cu2+ on camptothecin accumulation in Camptotheca acuminata cell line was described in this paper. The results showed that the optimum CuCl2 concentration in B5 medium was 0.008 mg/mL, which increased camptothecin production for 30 times compare to the control while has no inhibitive effects on cell growth, at the same time, the peroxidase activity was increased and the anthocyanidin accumulation was inhibited. The promotive effects of Cu2+ on camptothecin accumulation in light was higher than that in dark.
Anthocyanins ; biosynthesis ; Antineoplastic Agents, Phytogenic ; biosynthesis ; Camptotheca ; growth & development ; metabolism ; Camptothecin ; biosynthesis ; Copper ; pharmacology ; Light

Antiviral Agents ; pharmacology ; therapeutic use ; Congresses as Topic ; Drug Resistance, Viral ; Hepatitis B, Chronic ; diagnosis ; drug therapy ; virology ; Hepatitis C, Chronic ; diagnosis ; drug therapy ; virology ; Humans ; Liver Cirrhosis ; diagnosis ; therapy ; Liver Failure ; prevention & control ; Liver Neoplasms ; surgery ; therapy ; Nucleosides ; pharmacology ; therapeutic use

OBJECTIVETo determine whether testosterone modulates markers of cardiomyocytes aging via its classic androgen receptor (AR)-dependent pathway or conversion to estradiol.

METHODSMale littermates and testicular feminized (Tfm) mice were randomly separated into 4 experimental groups littermate controls (n=8), Tfm mice (n=7), testosterone-treated Tfm mice (n=8), and Tfm mice treated with testosterone in combination with the aromatase inhibitor anastrazole (n=7). Cardiomyocytes were isolated from mouse left ventricles, the activity of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), and the amount of malondialdehyde (MDA) were measured using colorimetry method, and expression of p16(INK4α) and retinoblastoma (Rb) proteins were detected by Western blotting.

RESULTSThe SOD and GSH-Px enzyme activities of cardiomyocytes were decreased, and the MDA levels and the expression of p16(INK4α) and Rb proteins were increased in Tfm mice compared with control mice. An increase was observed in the activities of SOD and GSH-Px enzyme as well as a decrease in MDA levels and the expression of p16(INK4α) and Rb proteins in the testosterone-treated Tfm mice. After co-treatment with anastrazole in Tfm mice, these improvement were partly inhibited.

CONCLUSIONPhysiological testosterone replacement can delay cardiomyocyte aging in Tfm mice, an effect that is independent of the AR pathway and in part conversion to estradiol.

Androgen-Insensitivity Syndrome ; metabolism ; Animals ; Cellular Senescence ; Cyclin-Dependent Kinase Inhibitor p16 ; analysis ; Female ; Glutathione Peroxidase ; metabolism ; Male ; Mice ; Myocytes, Cardiac ; physiology ; Receptors, Androgen ; physiology ; Superoxide Dismutase ; metabolism ; Testosterone ; physiology

OBJECTIVETo investigate the feasibility of detecting cyclin D1 protein expression and t(11;14) chromosomal translocation in paraffin-embedded tissues and its diagnostic and differential diagnostic significance for mantle cell lymphoma (MCL).

METHODSParaffin-embedded samples of 36 cases of MCL and a control group of 71 cases of small B-cell lymphomas were retrieved from archive materials. Immunohistochemical staining for cyclin D1 and semi-nested PCR for t(11;14) were detected in all samples. House-keeping gene beta-actin was used to detect the quality of DNA.

RESULTS(1) Cyclin D1 was expressed in 26 of the 36 MCL (72.2%). There was no cyclin D1 expression in the control group. (2) beta-actin DNA was detected in 101 of the 107 tumor cases (94.4%). t(11;14) was detected in 22 of the 36 MCL. Translocation was not found in control group. The positive rate for t(11;14) was 64.7% in MCL after exclusion of 2 cases which were negative for both t(11;14) and beta-actin. (3) 29 cases were positive for cyclin D1 and/or t(11;14), the positive rate reached 80.5%.

CONCLUSIONThe combined detection of cyclin D1 and t(11;14) in paraffin-embedded tissues is found to be a specific and feasible method for diagnosis and differential diagnosis of mantle cell lymphoma.

Adult ; Aged ; Aged, 80 and over ; Chromosomes, Human, Pair 11 ; Chromosomes, Human, Pair 14 ; Cyclin D1 ; analysis ; Female ; Humans ; Immunohistochemistry ; Lymphoma, Mantle-Cell ; chemistry ; diagnosis ; genetics ; Male ; Middle Aged ; Paraffin Embedding ; Polymerase Chain Reaction ; Translocation, Genetic

BACKGROUNDTo investigate the prevalence of anti-HEV among swine, sheep and chickens.

METHODSTotally 498 sera of swine, sheep and chickens collected from Xingjiang, Guangxi, Guangdong, Beijing and Hebei were detected for the anti-HEV by an enzyme linked immunoassay.

RESULTSThe anti-HEV positive rate of swine was 67.53%(104/154), in pigs between 4-5 months of age the rate was 100.00%(9/9) from Xingjiang. The rate in pigs under 3 months of age from Guangxi was 36.00%(9/25) and in pigs older than six months of age was 71.67% (86/120), respectively. The 108 sera of sheep collected from Xingjiang were all negative. The positive rate of chickens was only 1.27% (3/236). The anti-HEV prevalence rates of chickens from Luoding, Shenzhen, Liuzhou, Beijing and Hebei were 4.00%, 1.49%, 1.49%, 0, 0 respectively.

CONCLUSIONHEV infection does exist among swine and chickens. The anti-HEV prevalence of swine was the highest among domestic animals. The role of swine and chickens in transmission of HEV needs to be further studied.

Animals ; Antibodies, Viral ; Chickens ; China ; epidemiology ; Hepatitis Antibodies ; blood ; Hepatitis E ; epidemiology ; veterinary ; Hepatitis E virus ; immunology ; Poultry Diseases ; epidemiology ; virology ; Prevalence ; Sheep ; Sheep Diseases ; epidemiology ; virology ; Swine ; Swine Diseases ; epidemiology ; virology

Congresses as Topic ; Liver Diseases

RT-PCR was conducted with one degenerate primer designed according to repetitive regions' amino acid sequence of major ampullate spidroin (MaSp) in spiders and adaptor primer in the SMART cDNA Library Construction Kit. By cloning and sequencing of amplified products, one cDNA clone (GenBank Accession No. AY365017) of Argiope amoena MaSp gene was obtained. The deduced amino acid sequence can be distinctly divided into two regions: (1) Repetitive region that consists of an alternating alanine-rich and glycine-rich domain in which many prolines are present; and (2) C-terminal non-repetitive region. The region coding for 272 amino acids of MaSp gene was subcloned into prokaryotic expression vector pET28b(+) and an about 26kD recombinant protein was expressed at high levels in Escherichia coli BL21 (DE3) after induction of IPTG. After being purified with metal-affinity chromatography on Ni(2+) -IDA-Sepharose columns as well as gel filtration chromatography, the recombinant protein was confirmed to be predicted MaSp by means of amino acid composition analysis and N-terminal amino acid sequence analysis. The solubility behavior of recombinant MaSp with C-terminal non-repetitive region in the present study is similar to that of recombinant dragline silk proteins without C-terminal non-repetitive region expressed by bacteria and yeast in the other studies. The result shows that absence or presence of C-terminal non-repetitive region is not a crucial factor affecting the solubility of the recombinant MaSp.
Amino Acid Sequence ; Animals ; Base Sequence ; Chromatography, Affinity ; Cloning, Molecular ; DNA, Complementary ; chemistry ; genetics ; Electrophoresis, Polyacrylamide Gel ; Escherichia coli ; genetics ; Fibroins ; genetics ; metabolism ; Gene Expression ; Molecular Sequence Data ; Molecular Weight ; Plasmids ; genetics ; Recombinant Proteins ; chemistry ; isolation & purification ; metabolism ; Sequence Analysis, DNA ; Sequence Analysis, Protein ; Sequence Homology, Amino Acid ; Spiders ; genetics ; metabolism