Effect of aspirin plus clopidogrel therapy on aspirin resistance after off-pump coronary artery bypass surgery / 中国医学科学院学报

<p><b>OBJECTIVE</b>To investigate the effect of the anti-platelet effect of aspirin plus clopidogrel on off-pump coronary artery bypass (OPCAB) grafting and the possible side effects of such therapy.</p><p><b>METHODS</b>Sixty patients who underwent standard OPCAB were randomized immediately after surgery in two groups: the aspirin alone group of 30 patients who received aspirin (100 mg) daily; and the combination group of 30 patients who received clopidogrel (75 mg) plus aspirin (100 mg) daily. Platelet aggregation in response to arachidonic acid (PLAA) and adenosine diphosphate (PLADP) were measured at baseline (before surgery) and 1-6, 8, and 10 days after the medication. Postoperative bleeding and other perioperative parameters were compared between these two groups.</p><p><b>RESULTS</b>There were no significant differences between the two groups in perioperative findings including average number of distal anastomosis, operative time, postoperative bleeding, ventilation time, and intensive care unit stay (all P>0.05). The proportion of patients with the PLAA above 20% value was significantly lower in the combination group than those in the aspirin alone group (32.1% vs 62.1%, P<0.05). PLAA of two groups one and two days after taking aspirin or plus clopidogrel were (24.2±31.9)% vs. (49.6±32.6)% and (13.8±27.2)% vs. (37.6±37.4)%, respectively (P<0.05). No obvious postoperative complication was noted in both groups. Multivariate analysis showed that clopidogrel administration was independently correlated with aspirin resistance (P=0.044, OR = 0.09;95% CI=0.07-0.48).</p><p><b>CONCLUSION</b>Early combined use of aspirin plus clopidogrel after OPCAB can remarkably reduce OPCAB-related aspirin resistance and enjoy similar safety.</p>

Effects of salvianolic acid and notoginseng triterpenes on angiogenesis in EA-hy926 cells in vitro / 中国天然药物

AIM@#To investigate the different effects of salvianolic acid and notoginseng triterpenes on proliferation, angiogenesis and expression of vascular endothelial growth factor in EA-hy926 cells in vitro.@*METHODS@#EA-hy926 cells were cultured in vitro. Salvianolic acid and notoginseng triterpenes at concentrations of 0.4, 0.8 and 1.2 mg·L(-1) were used to culture EA-hy926 cells. EA-hy926 cells in a blank control group were grown in culture solution only. Viability of cells was assessed by CCK-8, and after treated for 12 h, capillary-like structures were examined. After 24 h culture, the expression of VEGF was detected by real-time PCR.@*RESULTS@#Salvianolic acid at 0.4, 0.8 mg·L(-1), the same as notoginseng triterpenes, increased VEGF content in EA-hy926 cells. Expression of VEGF protein in the salvianolic acid at 1.2 mg·L(-1) group, was up-regulated as compared with notoginseng triterpenes group (P < 0.05).@*CONCLUSION@#Salvianolic acid and notoginseng triterpenes can promote EA-hy926 cell proliferation, angiogenesis and expression of VEGF protein. This analysis also provided evidence that salvianolic acid had the better effects as compared with notoginseng triterpenes.

Initial experience of percutaneous coronary intervention guided by computed tomography coronary angiography derived roadmap and magnetic navigation system / 中华心血管病杂志

<p><b>OBJECTIVE</b>To evaluate the feasibility, efficacy and safety of the percutaneous coronary intervention (PCI)guided by computed tomography (CT) coronary angiography derived roadmap and magnetic navigation system (MNS).</p><p><b>METHODS</b>During June 2011 and May 2012, thirty consecutive patients receiving elective PCI were enrolled, coronary artery disease was primarily diagnosed by dual-source CT coronary angiography (DSCT-CA) at outpatient clinic and successively proved by coronary artery angiography in the hospital. Target vessels from pre-procedure DSCT-CA were transferred to the magnetic navigation system, and consequently edited, reconstructed, and projected onto the live fluoroscopic screen as roadmap. Parameters including characters of the target lesions, time, contrast volume, radiation dosage for guidewire crossing, and complications of the procedure were recorded.</p><p><b>RESULTS</b>Thirty patients with 36 lesions were recruited and intervened by PCI. Among the target lesions, sixteen were classified as type A, 11 as type B1, 8 as type B2, 1 as type C. The average length of the target lesions was (22.0 ± 9.8) mm, and the average stenosis of the target lesions was (81.3 ± 10.3)%. Under the guidance of CT roadmap and MNS, 36 target lesions were crossed by the magnetic guidewires, with a lesion crossing ratio of 100%. The time of placement of the magnetic guidewires was 92.5 (56.6 - 131.3) seconds. The contrast volume and the radiation dosage for guidewire placement were 0.0 (0.0 - 3.0) ml and 235.0 (123.5 - 395.1) µGym(2)/36.5 (21.3 - 67.8) mGy, respectively. Guidewires were successfully placed in 21 (58.3%) lesions without contrast agent. All enrolled vessels were successfully treated, and there were no MNS associated complications.</p><p><b>CONCLUSIONS</b>It is feasible, effective and safe to initiate PCI under the guidance of CT derived roadmap and MNS. This method might be helpful for the guidewire placement in the treatment of total occlusions.</p>

Expression and activity analysis of Enterovirus 71 3C protease in Escherichia coli / 病毒学报

The recombinant plasmid carrying the gene encoding 3C protease of Enterovirus 71 (EV71) was constructed, the recombinant protein was then expressed and purified, the functional activity was also measured. Firstly, the 3C protease gene was inserted into pET28a vector, the constructed recombinant plasmid was transformed into E. coli BL21 (DE3) for expression under the induction of IPTG. The expressed protein was purified by affinity chromatography (Ni-NTA) and the N-terminus His-tag was cleaved by enterokinase from 3C protease. The activity of 3C protease was evaluated with fluorescent peptide substrates. It was verified by restriction analysis and sequencing that recombinant plasmid pET28a-3C was constructed correctly and functionally expressed in E. coli BL21 (DE3) resulting in the production of recombinant 3C protease with a size of 22kD. Both His-tag and non-His-tag (cleaved by enterokinase) 3C protease exhibited similar enzyme activity to 3B-3C fluorescent peptide with Km, Vmax and Kcat values of 22 microM, 434nM. Min(-1) and 0.0669 Min(-1), respectively. The optimial pH and temperature were 7.0 and 30-37 degrees C, respectively. The acquirement of recombinant purified 3C protease with high activity has paved the way of further studies on anti-viral inhibitors, structural protein assembly, vaccine development and detection methods of EV71.

Effect of left superior pulmonary vein fat pad on atrial fibrillation in dogs / 第二军医大学学报

Objective Toexplore the effect of ablation of left superior pulmonary vein fat pad (LSPV-FP) on atrial fibrillation(AF). Methods Twelve healthy adult mongrel dogs were anesthetized and ventilated; both cervical vagosympathetic trunks were exposed for stimulation. Thoracotomies at the 4th intercostal space of left and right chest were performed to expose the LSPV-FP. The effective refractory period(ERP)/ERP-dispersion (dERP) of atrium and LSPV, AF inducibility, and the ventricular rate of AF were measured in the following statuses: baseline, vagosympathetic trunk stimulation(VTS), LSPV-FP ablation, and VTS post LSPV-FP ablation. Results At baseline status, stimulation of the left or right vagosympathetic trunks significantly shortened the ERP of atrial ([84. 44±29.50] ms vs [129. 7± 15. 83] ms, [85. 42±26. 11] ms vs [129. 7± 15. 83] ms, P<0. 05), increased the dERP of atrial ([71. 67 ± 14. 03] ms vs [34. 17 ± 18. 32] ms, [57. 5 ± 24. 17] ms vs [34. 17 ± 18.32] ms, P<0. 05), the difference of ERP between proximal and distal of LSPV(P<0. 05), AF inducibility ([5. 33± 231] times vs [0. 75±0. 96] times, [4. 67± 1. 155] times vs [0. 75±0. 96] times, P<0. 05), and deceased the ventricular rate of AF([143. 6±22. 42] beats/min vs [226. 3±28. 50] beats/min, [146. 4±30. 72] times/min vs [226. 3±28. 50] times/ min, P<0. 05). LSPV-FP ablation significantly attenuated all the above electrophysiological changes induced by left VTS(P< 0. 05), but showed no effects on those induced by right VTS. Conclusion Left vagosympathetic trunk plays an important role in the development and maintenance of AF partially through LSPV-FP.

Effect of left superior pulmonary vein fat pad on atrial fibrillation in dogs / 第二军医大学学报

Objective To explore the effect of ablation of left superior pulmonary vein fat pad(LSPV-FP) on atrial fibrillation(AF). Methods Twelve healthy adult mongrel dogs were anesthetized and ventilated; both cervical vagosympathetic trunks were exposed for stimulation. Thoracotomies at the 4th intercostal space of left and right chest were performed to expose the LSPV-FP. The effective refractory period(ERP)/ERP-dispersion (dERP) of atrium and LSPV, AF inducibility, and the ventricular rate of AF were measured in the following statuses: baseline, vagosympathetic trunk stimulation(VTS), LSPV-FP ablation, and VTS post LSPV-FP ablation. Results At baseline status, stimulation of the left or right vagosympathetic trunks significantly shortened the ERP of atrial ([84.44±29.50] ms vs [129.7±15.83] ms, [85.42±26.11] ms vs [129.7±15.83] ms, P<0.05), increased the dERP of atrial ([71.67±14.03] ms vs [34.17±18.32] ms, [57.5±24.17] ms vs [34.17± 18.32] ms, P<0.05), the difference of ERP between proximal and distal of LSPV(P<0.05), AF inducibility ([5.33± 1.231] times vs [0.75±0.96] times, [4.67±1.155] times vs [0.75±0.96] times, P<0.05), and deceased the ventricular rate of AF([143.6±22.42] beats/min vs [226.3±28.50] beats/min, [146.4±30.72] times/min vs [226.3±28.50] times/ min, P<0.05). LSPV-FP ablation significantly attenuated all the above electrophysiological changes induced by left VTS(P< 0.05), but showed no effects on those induced by right VTS. Conclusion Left vagosympathetic trunk plays an important role in the development and maintenance of AF partially through LSPV-FP.

Magnetic navigation system assisted percutaneous coronary intervention: a comparison to the conventional approach in daily practice / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>The benefits of the magnetic navigation system (MNS) for percutaneous coronary intervention (PCI) remain unclear, and a comparison of the MNS assisted approach to the conventional approach for PCI, when used in daily practice, is little studied. This study aimed to investigate the benefits of an MNS assisted technique as compared to the conventional technique for PCI.</p><p><b>METHODS</b>Forty-eight consecutive patients scheduled for PCI were recruited between December 2009 and April 2010. MNS assisted PCIs were performed on 54 target vessels. Another 45 patients with 54 target vessels undergoing conventional PCIs were selected from a historical population of patients to match the MNS group according to the coronary lesion type (ACC/AHA classification). Emergency PCIs and chronic total occlusions were excluded from both groups. Analyses were performed using Stata 9.2 statistical software.</p><p><b>RESULTS</b>There were no significant differences between the baseline characteristics of the MNS group and the control group. The success rates were 100.0% for the MNS assisted PCI and 98.1% for the conventional PCI, which did not reach a significant difference (P = 1.000); there were also no significant differences in terms of guide wire crossing time ((51.7 ± 30.5) seconds vs. (57.5 ± 49.4) seconds, P = 0.448), operation time ((28.4 ± 15.9) minutes vs. (28.0 ± 24.7) minutes, P = 0.935), X-ray exposure ((458.1 ± 350.1) µGym(2) vs. (558.7 ± 451.7) µGym(2), P = 0.197; and (94.2 ± 80.9) mGy vs. (96.2 ± 77.3) mGy, P = 0.895) or contrast usage ((7.3 ± 4.0) ml vs. (6.1 ± 3.7) ml, P = 0.121) between the two groups. However, a trend toward shorter guide wire crossing time and less X-ray exposure were observed for the magnetic group.</p><p><b>CONCLUSION</b>In daily practice, MNS assisted PCI resulted in a similar procedural success rate, operation time, and contrast usage, with a trend toward shorter guide wire crossing time and less X-ray exposure when compared to the conventional PCI.</p>

Clinical value of intracoronary ST-segment shift in diagnosis of early myocardial injury during percutaneous coronary intervention / 中国医学科学院学报

<p><b>OBJECTIVE</b>To evaluate the role of intracoronary electrocardiogram (IcECG) in examining early myocardial injury during percutaneous coronary intervention (PCI).</p><p><b>METHODS</b>Eight-six patients who had undergone elective PCI for their coronary heart disease were enrolled in the study. The IcECG both at baseline and after procedure were recorded with an incoronary guidewire and the serum levels of cardiac troponin T (cTnT) and creatine kinase-myoglobin were measured at baseline and 8 and 24 hours after intervention. Myocardial damage was defined as serum levels of cTnT increase above the upper normal value after intervention. Cardiac events after intervention was followed up.</p><p><b>RESULTS</b>Of all these 86 patients with normal serum levels of cardiac markers before the procedure, significant shift at ST-segment in IcECG during PCI was observed in 30 patients (35%, abnormal group) and no shift in the remaining 56 patients (65%, control group). All the procedures were successful. Serum levels of cTnT and creatine kinase-myoglobin were significantly higher in abnormal group than in control group after intervention (P < 0.01). The intracoronary ST-segment shift had a sensitivity of 77% and a specificity of 94% in predicting myocardial injury, with positive and negative predictive values of 90% and 86%, respectively. More cardiac events were observed in abnormal group than those in control group at a 4-week follow-up after intervention (P < 0.05) and major coronary event-free survival was significantly lower in those with post-procedural ST-segment shift in the IcECG (P < 0.05).</p><p><b>CONCLUSION</b>IcECG may be a useful method for predicting myocardial injuries during PCI.</p>

Activation of calcium-sensing receptors is associated with apoptosis in cardiomyocytes under simulated ischemia/reperfusion / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To examine the association of activation of calcium-sensing receptors (CaSR) with apoptosis in cardiomyocytes under simulated ischemia/reperfusion.</p><p><b>METHODS</b>Ventricular cardiomyocytes of neonatal rats were incubated in ischemia-mimetic solution for 2 h, then re-incubated in normal culture medium for 24 h to establish a model of simulated ischemia/reperfusion (I/R). Cell apoptosis was detected by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL assay). The expression of CaSR mRNA was detected by reverse transcriptase polymerase chain reaction (RT-PCR). The expression of Caspase -3 and Bcl-2 was detected by Western blotting.</p><p><b>RESULT</b>The simulated I/R enhanced the expression of CaSR and cardiomyocyte apoptosis. GdCl(3), a specific activator of CaSR, further increased the expression of CaSR and cardiomyocyte apoptosis, along with upregulation of Caspase-3 and downregulation of Bcl-2.</p><p><b>CONCLUSION</b>CaSR is associated with I/R injury and apoptosis in neonatal rat ventricular cardiomyocytes via suppressing Bcl-2 and promoting Caspase -3 expression.</p>

Clinical study on the coronary artery interventions guided by the magnetic navigation system / 中华心血管病杂志

<p><b>OBJECTIVE</b>To investigate the efficacy and safety of the magnetic navigation system used in the real world percutaneous coronary artery intervention.</p><p><b>METHODS</b>All lesions detected by the coronary artery angiography in the magnetic-navigation catheter lab indicated for percutaneous coronary artery intervention (PCI) were included and treated under the guidance of the magnetic navigation system. The characteristics of the target lesion, process of the procedure, time and dosage of the X-ray exposure, and procedure-related complication were recorded and analyzed.</p><p><b>RESULTS</b>One hundred and twenty one patients with 138 lesions were recruited and intervened by PCI during the period from April 2006 to June 2008. Thirty lesions were classified as type A, 50 as type B1, 36 as type B2, 22 as type C (including seven total occlusions). The average stenosis of the target lesions was (85.3 +/- 10.0)%, mean length was (21.1 +/- 10.0) mm. Under the guidance of the magnetic navigation system, 134 target lesions were passed by the magnetic guide-wires, the lesion passing ratio was 97.1%. The X-ray exposure time, X-ray dosage and the contrast volume used during the period of the wire placement were (55.9 +/- 35.4) seconds, (98.0 +/- 86.1) mGy/(490.0 +/- 422.2) microGym(2) and (8.0 +/- 5.4) ml, respectively. A total of 164 stents were implanted in the vessels where the target lesions were passed by the magnetic wires. There was no magnetic navigation system associated complication. Magnetic guide-wires failed to pass four target lesions, two of which were chronic total occlusions (CTOs), and the other two were calcified subtotal occlusions.</p><p><b>CONCLUSIONS</b>It is feasible and safe to adopt the magnetic navigation system for the real-world coronary artery intervention. The magnetic guide-wire possesses a high lesion-passing ratio. The CTOs and calcified subtotal occlusions are not ideal lesions for use of the magnetic navigation system.</p>

Hepatocyte growth factor attenuates ischemia/reperfusion induced cardiomyocyte apoptosis via downregulating calcium sensing receptor expression / 中华心血管病杂志

<p><b>OBJECTIVE</b>To examine whether the anti-apoptotic effect of hepatocyte growth factor (HGF) in cardiomyocytes underwent ischemia/reperfusion (I/R) is associated with downregulation of calcium sensing receptor (CaSR) mRNA expression.</p><p><b>METHODS</b>Neonatal rat cardiomyocytes were isolated and randomly divided into 7 groups: control, I/R, GdCl(3), GdCl(3) + NiCl(2) + CdCl(2), GdCl(3) + LY294002, GdCl(3) + HGF, GdCl(3) + HGF + LY294002.I/R was established by incubating primary neonatal rat ventricular cardiomyocytes in ischemia-mimetic solution for 2 h, then reincubated in normal culture medium for 24 h. Cardiomyocyte apoptosis was detected by TUNEL. The expression of CaSR mRNA was detected by reverse transcriptase polymerase chain reaction (RT-PCR). The expression of Caspase-3, Bcl-2 and Phosphoinositide-3 Kinase (PI3K) was analyzed by Western blot.</p><p><b>RESULTS</b>I/R enhanced the expression of CaSR mRNA (I/R: 2.62 ± 0.41, control: 1.00 ± 0.31, P < 0.01) and cardiomyocyte apoptosis [I/R: (15.32 ± 2.54)%, control: (2.90 ± 1.45)%, P < 0.01]. GdCl(3) further increased the expression of CaSR mRNA (GdCl(3): 4.46 ± 0.62, I/R: 2.62 ± 0.41, P < 0.01) and cardiomyocyte apoptosis [GdCl(3): (25.36 ± 2.60)%, I/R: (15.32 ± 2.54)%, P < 0.01], along with upregulation of Caspase-3 (GdCl(3): 1.93 ± 0.28, I/R: 1.50 ± 0.21, P < 0.01), downregulation of Bcl-2 (GdCl(3): 0.82 ± 0.18, I/R: 1.71 ± 0.30, P < 0.01) and PI3K phosphorylation inhibition (I/R: 0.87 ± 0.08, GdCl(3): 0.61 ± 0.07, P < 0.01). Combination of GdCl(3) with LY294002 further enhanced cardiomyocytes apoptosis [GdCl(3) + LY294002: (32.6 ± 3.42)%, GdCl(3): (25.36 ± 2.60)%, P < 0.01] but did not affect CaSR mRNA expression (GdCl(3) + LY294002: 4.27 ± 0.56, GdCl(3): 4.46 ± 0.62, P > 0.05). HGF decreased I/R- and GdCl(3)-induced apoptosis [GdCl(3) + HGF: (11.8 ± 1.89)%, GdCl(3): (25.36 ± 2.60)%, P < 0.05] by suppressing Caspase-3 (GdCl(3) + HGF: 1.12 ± 0.23, (GdCl(3): 1.93 ± 0.28, P < 0.05; GdCl(3) + HGF + LY294002: 1.87 ± 0.31, GdCl(3) + LY294002: 3.86 ± 0.47, P < 0.05) and promoting Bcl-2 (GdCl(3) + HGF: 2.56 ± 0.54, GdCl(3): 0.82 ± 0.18, P < 0.05; GdCl(3) + HGF + LY294002: 1.68 ± 0.28, GdCl(3) + LY294002: 0.68 ± 0.13, P < 0.05) and PI3K phosphorylation expression (GdCl(3) + HGF: 2.87 ± 0.21, GdCl(3): 0.61 ± 0.07, P < 0.05; GdCl(3) + HGF + LY294002: 2.01 ± 0.14, GdCl(3) + LY294002: 0.44 ± 0.10, P < 0.05) in accordance with downregulation of CaSR mRNA expression (GdCl(3) + HGF: 1.46 ± 0.37, GdCl(3): 4.46 ± 0.62, P < 0.01).</p><p><b>CONCLUSION</b>HGF exerts protective role in I/R-induced apoptosis at least in part by inhibiting CaSR mRNA expression along with promoting Bcl-2, suppressing Caspase-3 expression and stimulating PI3K phosphorylation signaling pathway.</p>

Psychological status in 1083 hospitalized patients with coronary artery disease / 中华心血管病杂志

<p><b>OBJECTIVE</b>To explore the prevalence and associated factors of anxiety and depression symptoms in hospitalized Chinese patients with coronary artery disease (CAD).</p><p><b>METHODS</b>From June 2007 to May 2009, 1083 hospitalized patients with confirmed coronary artery disease were recruited in this study. The ZUNG Self-rating Anxiety Scale (SAS) and the ZUNG Self-rating Depression Scale (SDS) were used for the psychological assessment. Economic status, living condition and the environment of both living and working places were evaluated by epidemiological questionnaires.</p><p><b>RESULTS</b>The prevalence of pure anxiety, pure depression symptoms and the combination of anxiety and depression symptoms were 7.9%, 28.3% and 14.3% respectively. Incidence of anxiety and depression symptoms was significantly higher in female patients compared with in male patients (P = 0.003, 0.012 respectively) and in aged patients than in middle-aged patients (P = 0.001). The elderly, less than 9 years of education and poor sleep quality increased the risk of anxiety symptom with ORs of 1.63 (95%CI: 1.21 - 2.21), 1.54 (95%CI: 1.15 - 2.07) and 1.62 (95%CI: 1.34 - 1.96), respectively, while workplace noise, history of chronic disease and poor sleep quality increased the risk of depression symptom with ORs of 1.52 (95%CI: 1.18 - 1.98), 1.36 (95%CI: 1.06 - 1.75) and 1.27 (95%CI: 1.08 - 1.50), respectively. Female (OR = 1.91, 95%CI: 1.22-2.98), aged patient (OR = 1.84, 95%CI: 1.23 - 2.76), workplace noise (OR = 1.61, 95%CI: 1.07 - 2.42), history of chronic disease (OR = 1.84, 95%CI: 1.24 - 2.71) and poor sleep quality (OR = 1.73, 95%CI: 1.35 - 2.21) were significantly correlated with the combined incidence of anxiety and depression symptoms.</p><p><b>CONCLUSION</b>Around half of the Chinese hospitalized CAD patients were complicated with various degrees of anxiety and/or depression symptoms. Female and aged patients were at higher risk for anxiety and depression symptoms. Sleep quality, workplace noise, years of education and history of chronic disease were independent risk factors for anxiety or depression symptoms.</p>

Effect of intracoronary adenovirus vector encoding hepatocyte growth factor gene on hematopoietic stem cells mobilization in patients with extensive coronary heart disease / 中华心血管病杂志

<p><b>OBJECTIVE</b>To investigate the effect of intracoronary adenovirus vector encoding hepatocyte growth factor gene (Ad(5)-HGF) on hematopoietic stem cells mobilization in patients with extensive coronary heart disease.</p><p><b>METHODS</b>Patients with extensive coronary heart disease were treated with intracoronary infusion of adenovirus vector encoding hepatocyte growth factor (Ad(5)-HGF 5 x 10(9) pfu) gene plus stent implantation (n = 9) or equal physiological saline plus stent implantation (n = 9). Angioplasty and stent implantation was performed according to standard clinical practice by the femoral approach and blood samples were drawn from each patient at baseline before PCI, 6 to 24 hours and 6 days post procedure. The number of CD34(+), CD38(+) and CD117(+) cells in peripheral blood was analyzed by flow cytometer.</p><p><b>RESULTS</b>The number of circulating CD34(+) cells in Ad(5)-HGF gene treatment group 6 hours after procedure and the number of circulating CD117(+) cells 6 days post procedure were significantly higher in Ad(5)-HGF gene treatment group than those in the control group (0.104 +/- 0.082 vs. 0.022 +/- 0.012, P = 0.021) and (0.058 +/- 0.058 vs. 0.012 +/- 0.009, P = 0.034), respectively.</p><p><b>CONCLUSION</b>Intracoronary administration of Ad(5)-HGF could mobilize hematopoietic stem cells into peripheral blood and the consequent role of this observation on myocardial regeneration warrants further detailed studies.</p>

Intraluminal enucleation in transurethral vaporization and electro-resection of the prostate / 中国基层医药

Objective To investigate the clinical efficacy of intraluminal enucleation in transurethrat vapor- ization and electro-reesection of the prostate.Methods A retrospective analysis was reviewed in 62 case of prostatic hypertrophy,which were treated with intraluminal enucleation in vaporization of prostate.All pacients had a sucessful operation.There were 12 case in unipolar vaporization and 50 in plasmakenitic bipolar vaporization.Results Opera- tion time ranged from 50 to 162 minutes,with an average of 76min.Bleeding ranged from 40 to 200 ml,with an av- erage of 110ml.There was no blood transfusion.The weight of prostate was 62～138g,the catheter was maintained for 3～5 days postoperatively.The hospital stay was 7～10 days,average 8 days.All patients were cured.There was a fllow-up for 1～20 months,with an average of 8 months.The IPSS decreased by 22 points on average,and peak urine flow(Qmax)increasd to(16.8?3.3)ml/s.There wre no urethralstricture,permanent urinary incontinence, TURS,postoperative hemorrhage,retrograde ejaculation and recurrence.Conclusions Intraluminal enucleation in treatment of prostalic hypertroply is a new,safe,and effective method,which should be popularized in clinical prac- tice.

Prognostic value of devated baseline C-reactive protein and interleukin-6 levels on the vascular complications in percutaneous coronary intervention / 中华急诊医学杂志

Objective To investigate whether elevated pre-procedural C-reactive protein (CRP) and Interleukin-6 (IL-6) concentrations may be relevant to early outcome in patients undergoing PCI.Method 100 consecutive patients undergoing pereutaneuous coronary intervention (PCI) were included in our study.Peripheral blood samples for CRP and IL-6 testing were withdrawn before PCI.Acute vascular complications resulted from PCI were determined by subsequently coronary angiography.The early coronary events during hospitalization were clinically followed.Results Thirty patients developed acute vessel occlusion,and another one developed subacute coronary thrombosis at 2 days after PCI.Increased levels of CRP correlated well with the occurrence of vascular complications as regards the significant difference existing amongⅠvsⅢandⅠvsⅣquartile groups,P

Hepatocyte growth factor did not enhance the effects of bone marrow-derived mesenchymal stem cells transplantation on cardiac repair in a porcine acute myocardial infarction model / 中华心血管病杂志

<p><b>OBJECTIVE</b>To evaluate the impact of combined therapy with transplanting bone marrow-derived mesenchymal stem cells (BM-MSCs) via noninfarct-relative artery and hepatocyte growth factor (HGF) in a porcine myocardial infarction (MI) model.</p><p><b>METHODS</b>BM-MSCs were obtained from pig bone marrow, expanded in vitro with a purity of > 50%. MI was induced by ligating the distal left anterior descending artery in pigs. Eighteen animals received BM-MSCs cells (5 x 10(6)/ml, n = 6), BM-MSCs cells (5 x 10(6)/ml) plus HGF (4 x 10(9) pfu, n = 6) or equal volume culture medium (IMDM) via non-infarct-related artery at four weeks after MI. Gated myocardial perfusion imaging and coronary angiography were performed before and four weeks after transplantations. Histological examination was also performed 4 weeks after transplantation.</p><p><b>RESULTS</b>LVEF measured by gated myocardial perfusion imaging was similar among groups before transplantation and significantly increased in BM-MSCs (45 +/- 3 vs. 34 +/- 2%, P < 0.05) or BM-MSCs + HGF (46 +/- 6 vs. 34 +/- 3%, P < 0.05) treated animals while remained unchanged in IMDM (30 +/- 3 vs. 32 +/- 2%) treated animals 4 weeks post transplantation. Similarly, capillary density was also significantly higher and myocardial perfusion defect scores significantly decreased in BM-MSCs or BM-MSCs + HGF treated hearts than that in IMDM treated hearts. However, all these changes were similar between BM-MSCs and BM-MSCs + HGF groups. Rentrop score was similar before and 4 weeks after transplantation among various groups.</p><p><b>CONCLUSION</b>HGF in combination with BM-MSCs transplantation did not enhance the cardiac repair effects of BM-MSCs transplantation alone and BM-MSCs transplantation did not improve collateral circulation in this model.</p>

Constitutive expression and purification of Alcaligenes faecalis penicillin G acylase in Escherichia coli / 生物工程学报

Considering Alcaligenes faecalis pencillin G acylase(AfPGA), which possesses the attractive characteristics for beta-lactam antibiotics conversions, the gene of PGA was cloned into an expressing vector pKKFPGA. The recombinant plasmid contained multicopy replicon(COLE 1), trc promoter, AfPGA gene, rrnB transcript terminator and ampicillin marker transformed Escherichia coli DH5alpha. As both the recombinant plasmid and the host DH5alpha had no laclq gene, the trc promoter was always active and the AfPGA could be constitutively expressed without IPTG induction in the host DH5alpha. In the shaking flask, the recombinant cell was inoculated into the fermentation medium (tryptone 10g/L, yeast extract 5g/L, MgSO4 x 7 H2O 1g, KH2 PO4 2g/L, K2HPO4 x 3H2O 5g/L, Na2HPO4 x 12H2O 7g/L, (NH4)2SO4 1.2g/L, NH4Cl 0.2 g/L, NaCl 0.1g/L, dextrin 30g/L) and cultured at 28 degrees C for 20h. The production of AfPGA reached 2,590u/L(NIPAB method), with a cell-density-specific activity of more than 300(u/L)/A600, this yield increased 432 fold higher than the native expression of Alcaligenes faecalis . Without ammonium sulphate fractionation and dialysis, the supernatant of crude extract was directly loaded on DEAE-Sepharose CL 6B column equilibrated by phosphate buffer (50mmol/L, pH7.8), and the enzyme fraction was not absorbed on the column but impurities were absorbed. Subsequently the effluent was added ammonium sulphate to 1mol/L and loaded on Butyl-Sepharose CL 4B column equilibrated by 50mmol/L phosphate buffer pH7.8-1mol/L ammonium sulphate. The enzyme was eluted as concentration of ammonium sulphate in phosphate buffer decreased to 0, PGA was eluted. After these two column chromatography, the enzyme was enriched 20 times with a 91% activity recovery. The purified enzyme had a specific activity of 68.6u/mg protein. However, the overproduction of PGA was often limited by translocation and/or periplasmic processing steps, subsequently resulted in intracellular accumulation of various types of PGA precursors and then formed inclusion bodies in the cytoplasm and/or periplasm. In this study, 5% PGA precursors formed as inclusion bodies in the cytoplasm while no inclusion bodies formed in the periplasm. It suggested most PGA precursors were transported to the periplasm and matured to active PGA and also explained why PGA gene was highly expressed in the host DH5alpha. On the other hand, inclusion bodies in the cytoplasm indicated that the maturation of PGA in the host DHSalpha was limited by the translocation step.

Curative effects of salmetorel xinafoate and fluticasone propionate powder inhalation on 140 children with asth- ma / 实用儿科临床杂志

Objective To observe the effects of asthmatic children treated by inhaled salmeterol xinafoate and fluticasone propi-onate powder. Methods One hundred and fourty cases of moderate and severe asthmatic children were treated in non- acute period aged from 4 to 14 years by inhaling salmeterol xinafoate and fluticasone propionate powder, compared with control group treated by flu-ticasone propionate in 106 cases, and the pulmonary function was monitored simultaneously. Results The total effective rate of the treatment group and control group were 99. 3 % , 99. 1 % , respectively.The pulmonary function indexes such as the first one second expiration volume(FEV1), flow velocity of 50 % expiration vital capacity(FEF50%), peak expiration velocity(PEF1) after being treated 4 months was improved significantly compared with those before treatment.The difference between them was statistically significant (P