Objective To investigate the efficacy and safety of tirofiban in acute coronary syndrome(ACS)patients during primary PCI.Methods Sixty two patients with ACS who underwent primary PCI were randomly divided into two groups which were:the tirofiban + PCI group(n=32)and the primary PCI group(n=30).Tirofiban was predominantly initiated in the catheter laboratory before or during the intervention and maintained for a mean of 30 h(10 ?g/kg for bolus,followed by 0.15 ?g/kg?min infusion).Platelet counting,MACE event and periprocedural complication were investigated.Heart function by echo was observed.Results The incidence of the major primary end point(refractory ischemia,new myocardial infarction and death)at 30 days was significantly lower in the tirofiban group than that in the placebo group(9.3% vs 20.0%,P

AIM To observe Arg-Glu*ss activity of antiplatelet and anticoagulation in rats and to further explore its mechanism. METHODS Twenty four male sprague dewley rats were divided into three groups randomly (eight rats in each group).Each group was orally given Arg-Glu (61 4 mg?kg -1 ?d -1 ), ASA (36 mg?kg -1 ?d -1 ) and equal placebo solution respectively.Eight days later all rats were given anesthesia and blood was taken from abdominal aorta with a plastic catheter, then the indexes related to blood hemodynamics,coagulation and blood fibrinolysis were measured. Twenty four SD rats were treated in the same way mentioned above. Platelet aggregation was measured by turbidimetric method. Plasma level of cyclic GMP and prostacyclin was evaluated by radioimmunoassay and nitric oxide by spectrophotometric determination. Common carotid artery-external jugular vein bypass was established in another 24 rats, and the weight of wet thrombus was measured with high sensitive electrical scale. RESULTS In group of Arg-Glu, statistically significance decrease versus placebo group was observed on blood apparent viscosity, reduced viscosity, hematocrit and plasma viscosity, increase versus placebo was also observed on blood reciprocal calcium time, activated partial thromboplastin time and prothrombin time ( P 0 05). Platelet aggregation activation decreased compared with placebo 〔(0 75%?3.62%) vs (32 8%?6 62%) P 0 05)〕. CONCLUSION Arg-Glu with its properties of antiplatelet、anticoagulation and improvement of blood rheology status in rats could be regarded as one antiplatelet drug and one NO precursor .Its mechanism of action was thought to be by Arg-NO-cGMP metabolism pathway while other mechanism might be involved.

Objective To explore the cardiovascular risk factors and clinical features of coronary lesions in male patients with premature coronary artery disease(CAD).Methods A total of 448 male patients with CAD confirmed by angiography were divided into two groups by age: premature CAD(n=145,

Aim To investigate the effects of thrombospondin-1 type Ⅰ repeat antisense RNA on cell proliferation and growth activity of human endothelial cells.Methods The eukaryotic expression vector of pcDNA3.1-/anti-TSP-1-Ⅰ was constructed.Then the vector was transfected into human umbilical vein endothelial cells(HUVECs).The growth activity of endothelial cells after transfection was detected by MTT.The variation of endothelial cell's cycle was determined by flow cytometry.Cell morphological change was observed by transmission electron microscope.Results The eukaryotic expression vector(pcDNA3.1-/anti-TSP-1-Ⅰ)was successfully constructed and transfected into HUVECs.The OD value of pcDNA3.1-/anti-TSP-1-Ⅰ transfective group was promoted compared with that of nontransfective group(P

Ebstein malformation is a congenital heart disease characterized pathologically by displacement of the septal leaflet of the tricuspid valve towards the apex of the right ventricle of the heart. Hypoplasia, dysfunction of the right ventricle and tricuspid regurgitation cause an increased volume load of the right heart and result in the clinical manifestations of chest tightness, shortness of breath and fatigue after activities, palpitation, cyanosis and heart failure. We report a case of Ebstein's anomaly with refractory right heart failure and leg ulcers.
Ebstein Anomaly ; Heart Failure ; Heart Ventricles ; physiopathology ; Humans ; Leg Ulcer ; Tricuspid Valve Insufficiency

AIM: To investigate the use of therapy ultrasound to enhance nonviral gene delivery. METHODS: Endothelial cells (EC) and vascular smooth muscle cells (VSMC) were cultured in 6-well plates. Plasmid (pcDNA3.1/His/LacZ) with or without microbubbles at the different concentrations was transfected into the cells with the use of ultrasound for 1 min at 2 MHz, 1.8 mechanical index (MI). Additional controls included ultrasound alone, microbubble alone and microbubble plus plasmid. The rate of blue cells and the activities of ?-Gal were measured. In addition, cell viability was detected with different time from 1 to 30 min of ultrasound irradiation and the different concentrations of microbubbles. RESULTS: In the group of ultrasound with microbubble, the rate of blue cells and activity of ?-Gal markedly increased by 60% and 9-fold, respectively. Microbubbles at concentration of 10% led to the highest transfection effect. Ultrasoud exposure at 1 to 30 minute had no cell toxic effects, while microbubbles at the concentration of 50% had significant effect on cell survival. CONCLUSIONS: Albumin-coated microbubbles markedly enhance gene delivery by therapeutic ultrasound-mediated microbubble destruction, which can be used as a safe and practicality vectors in gene therapy.

OBJECTIVETo characterize a new alternative splicing isoform of human vascular endothelial growth factor (VEGF) gene.

METHODSThe total RNA was extracted from the lung tissue of a legally aborted 4-month-old fetus and amplified by RT-PCR. The amplified product was cloned into the plasmid pMD18-T and plasmid pcDNA3.1- for sequence analysis.

RESULTSElectrophoresis of the RT-PCR products displayed one short band for VEGF(121) (487 bp) and a long band. The latter was characterized to contain two fragments: one was normal VEGF(165) (619 bp), and the other (639 bp) had an identical nucleotide sequence to VEGF(165) with a 20 bp fragment inserted between exons 3 and 4. Sequence analysis showed that this 20-bp nucleotide was inserted from the 3' end of the third intron containing a splicing signal, thus causing shift mutation in the reading frame of VEGF gene and early appearance of the stop codon UAG in the middle of exon 4.

CONCLUSIONA new alternative splicing isoform of VEGF probably exists in the lung tissue of a legally aborted human fetus, and its biological significance remains to be further investigated.

Alternative Splicing ; Amino Acid Sequence ; Exons ; Frameshift Mutation ; Gene Expression ; Humans ; Protein Isoforms ; classification ; genetics ; Reverse Transcriptase Polymerase Chain Reaction ; Vascular Endothelial Growth Factor A ; classification ; genetics

Objective To investigate the dynamic changes of HSP70 mRNA expression in the liver tissue of rats with traumatic shock and the treatment effects of glycine.Methods The expression of HSP70 mRNA in the liver tissue of treatment group,shock group and control group was detected by ELISA.Pathological changes were observed,and serum ALT and AST were measured.Results The expression of HSP70 mRNA in the liver tissue of rats in the shock group and the treatment group reached peak at the 6th and 12th hour after resuscitation respectively.Serum ALT and AST increased and pathological damage aggravated with time prolonging.Compared with control group,the expression of HSPT0 mRNA in treatment group increased significantly,serum ALT and AST decreased significantly and pathologi- cal damage was significantly relieved(all P<0.05).Conclusion Glycine can increase the expression of HSPT0 mRNA and relieve the secondary damage of liver after traumatic shock.

Objective To investigate the effects of glycine on the expression of HSP70 and TNF-α mRNA in the liver tissue of rats with traumatic shock and explore the protective mechanism of glycine a-gainst secondary liver injury after traumatic shock. Methods The traumatic shock model was established and 120 Wistar rats were divided randomly into three groups: treatment group, shock group and control group. At the beginning of resuscitation, the rats in the treatment were injected with 0.5 ml isotonic saline containing 100 mg/kg glycine, those rats in the shock group were injected only with 0.5 ml isotonic saline. The rats in three groups were killed at 3, 6, 12, 24 and 48 hours after resuscitation respectively. The ex-pression of HSP70 and TNF-α mRNA in the liver tissue were detected by RT-PCR, pathological changes were observed and serum ALT and AST were measured. Results The expressions of HSP70 and TNF-α mRNA in the liver tissue of rats in the shock group began to increase at 3 hours and both reached the peak value at 6 hours after resuscitation, but the expression of HSP70 mRNA in the treatment group reached the peak value at 12 hours after resuscitation. Compared with the control group, the expression of HSP70 mR-NA in the treatment group increased significantly and that of TNF-α mRNA decreased siganicantly, serum ALT and AST decreased and pathological damage was relieved significantly (all P < 0.05). Conclusion By enhancing the expression of HSP70 mRNA and decreasing the expression of TNF-α mRNA, glycine may play a protective role against the secondary damage of liver after traumatic shock.

To research the expression of key enzymes in saikosaponin biosynthesis and the content of saikosaponin under the drought stress, the study focused on the gene-level and the end product responses to environmental change. Taking the five months of Bupleurum chinense as research materials, the contents of saikosaponin A and saikosaponin D under different stress levels were measured by HPLC. The drought was simulated by poly ethylene glycol. The real-time fluorescence quantitative PCR was used to analyze the expression of four key enzymes genes HMGR, IPPI, FPS, β-AS and the expression of β-tubulin was set as a reference gene. The results showed that drought stress significantly improved the content of saikosaponin. The contents of SSa and SSd were highest researching 0.648% and 0.781%, respectively when the concentration of PEG was 10%. Meanwhile, the results reflected that the expression of four key enzymes had risen differently and FPS, β-AS raised significantly(P<0.01). In addition, the results of correlation analysis showed that there was a significant positive correlation between the expression of the four key enzymes genes and the content of saikosaponin. In a word, the contents of secondary metabolites were regulated by the expression of key enzymes genes under the drought stress in B. chinense.