Objective To study the significance of serum IL-17 level in patients with acute coronary syndrome (ACS ) before and after rosuvastatin treatment .Methods Forty-eight ACS patients served as group A and 30 stable angina pectoris patients served as group B in this study .T heir blood-lipid level and serum hs-CRP and myocardial enzyme levels were measured and the number of coronary artery branches with lesions was calculated .Their association with serum IL-17 level was analyzed .Patients in group A were treated with rosuvastatin .The serum IL-17 levels were compared in two groups before and 4 weeks after rosuvastatin treatment .Results The serum IL-17 level was significantly higher in group A than in group B before rosuvastatin treatment (34.41 ± 6 .37 ng/L vs 15 .18 ± 3 .11 ng/L ,P<0 .05) and significantly lower in group A 4 weeks after rosuvastatin treatment than before rosuvastatin treatment (16 .71 ± 4 .72 ng/L vs 34 .41 ± 6.37 ng/L ,P<0 .05) .No significant difference was found in serum IL-17 level between the two groups after rosuvastatin treatment (P>0 .05) .Multivariate regression analysis showed that the serum hs-CRP and troponin level and the number of coronary artery branches with lesions were positively related with the serum IL-17 level (P=0 .012 ,0 .008 ,0 .000) .Conclusion Serum IL-17 level in ACS patients can partly reflect the severity of ACS .Early treatment of ACS with rosuvas-tatin can reduce the inflammatory reactions and serum IL-17 level ,and is of great significance in stabilizing the coronary plaques and reducing the incidence of ACS .

Rhamnolipid biosurfactant is mainly produced by Pseudomonas aeruginosa that is the opportunistic pathogenic strain and not suitable for future industrial development. In order to develop a relatively safe microbial strain for the production of rhamnolipid biosurfactant, we constructed engineered Escherichia coli strains for rhamnolipid production by expressing different copy numbers of rhamnosyltransferase (rhlAB) gene with the constitutive synthetic promoters of different strengths in E. coli ATCC 8739. We further studied the combinatorial regulation of rhlAB gene and rhaBDAC gene cluster for dTDP-1-rhamnose biosynthesis with different synthetic promoters, and obtained the best engineered strain-E. coli TIB-RAB226. Through the optimization of culture temperature, the titer of rhamnolipd reached 124.3 mg/L, 1.17 fold higher than that under the original condition. Fed-batch fermentation further improved the production of rhamnolipid and the titer reached the highest 209.2 mg/L within 12 h. High performance liquid chromatography-mass spectrometry (LC-MS) analysis showed that there are total 5 mono-rhamnolipid congeners with different nuclear mass ratio and relative abundance. This study laid foundation for heterologous biosynthesis of rhanomilipd.
Bacterial Proteins ; genetics ; Batch Cell Culture Techniques ; Decanoates ; Escherichia coli ; metabolism ; Fermentation ; Glycolipids ; biosynthesis ; Hexosyltransferases ; genetics ; Industrial Microbiology ; methods ; Multigene Family ; Promoter Regions, Genetic ; Pseudomonas aeruginosa ; Rhamnose ; analogs & derivatives ; biosynthesis ; Surface-Active Agents ; metabolism

Objective To explore the risk factors for patients with massive hemoptysis in tuberculosis and to provide a strategy for clinical treatment for tuberculosis massive hemoptysis (TMH). Methods Chi-square test and multivariate logistics analysis were applied to analyze the medical data of 241 cases of TMH. Results Chi-squared test showed that eleven factors were found to be significantly correlated with TMH. Longer disease course (≥3 months), lung lesions range ≥ 3 lung fields, pulmonary tuberculosis cavity, a higher smoking index (≥400 cigarettes per year) and clinical treatment were risk factors for TMH. Patients aged 45 years or older accompanied with bronchiectasia, pulmonary fungal infection, diabetes or hepatopathy had higher probabilities of developing massive hemoptysis. Multivariate analysis showed lung lesions range over 3 lung fields (OR = 2.447,P = 0.015), pulmonary tuberculosis cavity (OR = 2.486, P = 0.004), bronchial asthma (OR =3.192,P = 0.002), pulmonary fungal infection (OR = 3.896, P = 0.005) and hepatopathy (OR = 3.101, P =0.006) were final risk factors for TMH. Conclusion Multiple factors contributed to patients with massive hemoptysis in tuberculosis. Lung lesions range over 3 lung fields, pulmonary tuberculous cavities, bronchial asthma, lung fungal infection and hepatopathy might be the independent risk factors for TMH.

Objective To investigate the correlation between subclinical hypothyroidism (SCH) and cerebral atherosclerosis burden in patients with large artery atherosclerotic stroke.Methods Consecutive inpatients with acute large artery atherosclerotic stroke were enrolled.SCH was defined as TSH 4.50-10.0 mU/L and serum thyroxine level was normal.Cerebral atherosclerosis burden score was used to evaluate the severity of cerebral atherosclerosis.The total score of 1 or 2 was defined as mild atherosclerosis,and >2 was defined as severe atherosclerosis.Univariate analysis and multivariate logistic regression analysis was used to evaluate the correlation between SCH and severe cerebral atherosclerosis.ResultsA total of 263 patients with large artery atherosclerotic stroke were enrolled,including SCH 62 (23.6%),mild atherosclerosis 119 (45.2%),and severe atherosclerosis 144 (54.8%).The age (63.6±10.9 years vs.60.5±11.4 years;t=2.274,P=0.024),homocysteine (17.10±6.20 μmol/L vs.15.63±5.17 μmol/L;t=2.058,P=0.041),National Institutes of Health Stroke Scale (NIHSS) score (8.0 [5.0-10.0]vs.6.0 [5.0-9.0];Z=2.059,P=0.039),as well as the proportions of patients with hypertension (72.9%vs.58.8%;χ2=5.812,P=0.016),smoking (38.2%vs.26.1%;χ2=4.366,P=0.037),and SCH (30.6%vs.15.1%;χ2=8.610,P=0.003) in the severe cerebral atherosclerosis group were significantly higher than those in the mild cerebral atherosclerosis group.Multivariate logistic regression analysis indicated that SCH was an independent risk factor for severe atherosclerosis in patients with large atherosclerotic stroke (odd ratio 3.345;95%confidence interval 1.692-6.612;P=0.001) after adjusting for age,sex,hypertension,smoking,homocysteine,and NIHSS score.ConclusionSCH is an independent risk factor for severe cerebral atherosclerosis in patients with large atherosclerotic stroke.

ObjectiveTo explore the effect of the Breviscapine (Bre) on rabbit's cardiac muscles after ischemic preconditioning (IP).MethodsThe myocardial ischemic reperfusion model was made with 32 New Zealand white rabbits by silk thread passed around the left circumflex coronary artery and the apex. Model animals were randomly divided into four groups: myocardial ischemia-reperfusion (I/R) group, Bre+I/R group, IP group and Bre+IP group. The changes of the endothelin (ET), nitrous oxide (NO) and the enzymes of the cardiac muscle were measured, and the areas of myocardium infarction were analyzed.ResultsBre and IP could decrease the content of ET, the enzymes of the cardiac muscle and myocardial infarction area; increase the content of the NO. Bre+IP could strengthen the role of protecting the ischemic myocardial cells.ConclusionThe Bre can protect the ischemic cardiac muscle. The Bre+IP can strengthen the protective effect of the IP.

OBJECTIVEThis preliminary study aims to investigate the effects of titanium and titanium alloy micro-nano-dimensional topography on the biological behavior of osteoblasts in vitro.

METHODSElectrolytic etching (EE) method was used to produce micro-nano dimensional titanium surfaces. The surfaces were observed to determine their effects on the adhesion, proliferation, cell morphology, and alkaline phosphatase (ALP) activity of osteoblasts.

RESULTSThe surfaces of the titanium and titanium alloy groups exhibited higher adhesion and proliferation of osteoblasts than those of the mechanical group. The titanium surface was covered with a group of cells, a large number of filopodia, and functional particles. The ALP activity of the titanium group was significantly higher than that of the titanium alloy and mechanical groups.

CONCLUSIONEE method in pure titanium and titanium alloy surfaces result in bowl-like nests and nanostructures of different diameters and depths. The diameters of the pure titanium and titanium alloy surfaces range from 30 to 50 μm and 5 to 8 μm, respectively. The former is more conducive to promote the proliferation and differentiation of cells.

Alloys ; Cell Differentiation ; Cell Proliferation ; Dental Etching ; Humans ; Nanostructures ; Osteoblasts ; Prostheses and Implants ; Surface Properties ; Titanium

Objective This preliminary study aims to investigate the effects of titanium and titanium alloy micro-nanodimensional topography on the biological behavior of osteoblasts in vitro. Methods Electrolytic etching (EE) method was used to produce micro-nano dimensional titanium surfaces. The surfaces were observed to determine their effects on the adhesion, proliferation, cell morphology, and alkaline phosphatase (ALP) activity of osteoblasts. Results The surfaces of the titanium and titanium alloy groups exhibited higher adhesion and proliferation of osteoblasts than those of the mechanical group. The titanium surface was covered with a group of cells, a large number of filopodia, and functional particles. The ALP activity of the titanium group was significantly higher than that of the titanium alloy and mechanical groups. Conclusion EE method in pure titanium and titanium alloy surfaces result in bowl-like nests and nanostructures of different diameters and depths. The diameters of the pure titanium and titanium alloy surfaces range from 30 to 50 μm and 5 to 8 μm, respectively. The former is more conducive to promote the proliferation and differentiation of cells.

Background and objective Radiofrequency ablation (RFA) of lung tumours has recently received much attention for the promising results achieved. Here, to evaluate the value of three-dimensional reconstruction CT in radiofrequen-cy ablation (RFA) of advanced non-small cell lung cancer. Methods Sixty-six cases of advanced non-small ceil lung cancer with 68 lesions (2 patients had 2 lesion treated in one session) were underwent three-dimensional reconstruction CT-giuded percuta-neous RFA therapy. To evaluate short-term therapeutic effect of lung tumors using spiral CT scanning in 1-3 months after RFA to investigate the alterations of minor size and density pre-and post-procedure, and complications, to observe the short-term cura-tive effect. Results Our experiences have shown an initial increase in lesion size at immediate follow-up CT. The density of 64 lesions was lowered (94.1%) and 4 lesion is increased (5.9%) at immediate and one month follow-up CT. SPECT scan findings that 82.4% (56/68) cases of FDG uptake in tumors after RFA with tumor/non-tumor of lower than 2.5 at one month follow-up. The change in treated lesion size over time, radiologically assessed through measurements of the lesions on axial CT scans in the lung window setting no lesions had complete response, 50 lesions (73.5%) had partial response, 2 lesions with stable disease, 6 lesions showed progressive disease at 3 month follow-up CT. SPECT scan findings that 79.4% (54/68) cases of FDG uptake in tumors after RFA with tumor/non-tumor of lower than 2.5 at 3 month follow-up. Conclusion The percutaneons RFA therapy under the guidance of three-dimensionsl reconstruction CT scan is safe and effective, with few complications, and can serve as a new method to the treatment of advanced non-small ceil lung cancers.