Objective:To study assessment value of brachial‐ankle pulse wave velocity (baPWV) for severity of coro‐nary disease in patients with coronary heart disease (CHD) .Methods :According to SYNTAX score of coronary an‐giography ,a total of 206 CHD patients from our hospital were divided into mild group (n=74 ,SYNTAX score <23 scores) ,medium group (n= 72 ,SYNTAX score 23~32 scores) and severe group (n= 60 ,SYNTAX score > 32 scores) .Another 80 healthy subjects undergoing physical examinations were selected as healthy control group during the same period .BaPWV ,ankle brachial index (ABI) and carotid -femoral pulse wave velocity (cfPWV) were measured and compared among all groups .Pearson correlation analysis was used to analyze the correlation among baPWV ,cfPWV ,ABI and SYNTAX score in CHD patients ;multi -factor Logistic regression model was used to analyze whether baPWV ,cfPWV and ABI were risk factors for SYNTAX scores .Results:Compared with healthy control group ,there were significant rise in baPWV [ (1.2 ± 0.3) m/s vs .(1.5 ± 0.4) m/s vs .(1.8 ± 0.6) m/s vs . (2.0±0.7)m/s]andcfPWV [ (1.3±0.5)m/svs.(2.5±0.7)m/svs.(2.9±0.8)m/svs.(3.4±0.7)m/s]in mild group ,medium group and severe group (P<0.05 or <0.01) ,and that of severe group was more than that of medium group ,and>mild group in turn ,there was significant difference by pairwise comparisons ( P<0.05 all);significant reduction in ABI [ (1.02 ± 0.32) vs .(0.82 ± 0.24) vs .(0.73 ± 0.16) vs .(0.56 ± 0.09)] in mild group , medium group and severe group ,and that of severe group was < medium group ,and < mild group in turn ,there was significant difference by pairwise comparisons ( P<0.05 all) .Pearson correlation analysis indicated that baPWV and cfPWV were positively correlated with SYNTAX score ( r= 0.613 , P= 0.007;r=0.528 , P=0.023) ,while ABI had no correlation with SYNTAX score .Multi-factor Logistic regression analysis indicated that diabetes melli‐tus ,hypertension ,baPWV and cfPWV were risk factors for SYNTAX score (OR=4.016~5.809 , P<0.05 or <0.01) .Conclusion:The baPWV can effectively assess severity of coronary disease in CHD patients .

Aim To study cytokine(CK) changes of IL-6,IL-8,sIL-2R and TNF-a levels in sera from patients with juvenile rheumatoid arthritis(JRA) and rheumatoid arthritis(RA) and its correlation with the conventional inflammation indexes,erythrocyte sedimentation rate(ESR) and C-reactive protein(CRP). Methods Levels of IL-6,IL-8,sIL-2R and TNF-a in serum from 30 JRA patients and 34 RA patients,in the synovial fluid (SF)from 4 JRA patients,7 RA patients,6 osteoarthritis(OA) patients and 9 meniscitis(MT) patients were detected by sandwich ELISA. Results As compared with control group,① levels of IL-6 and SIL-2R in sera from 30 JRA patients and 34 RA patients and levels of IL-8 in sera from 30 JRA patients possessed marked difference P∨ 0.01 and P∨ 0.05,respectively.② There were significant difference among serum IL-8 and sIL-2R levels from systemic JRA patients, pauciaticular JRA patients,and serum IL-6 levels from polyarticular JRA patients(P<0.01). ③ There were remarkable difference among SF sIL-2R levels from 4 JRA patients and 7 RA patients and in SF IL-6 levels from 7 with RA patients.④ There were obvious correlativity between serum IL-6,sIL-2R levels and changes of serum ESR and CRP from the JRA patients(r=0.532 and r=0.621,respectively). Conclusion ① IL-6 and sIL-2R exhibit a close correlativity with the activity of JRA and RA,which is the main index of activity of JRA and RA diseases.② sIL-2R might not only participate in systemic pathologic process in JRA and RA diseases,but also serves as a major CK in local articular injuries.IL-6 participates in local articular injuries too,and seems to play a more important role in local articular injuries of RA.③ IL-8 may participate in systemic pathologic process of JRA,but play a minor part in local articular injuries.

Constructing robust gene circuits is a fundamental work for synthetic biology. Bacteria with suicide gene circuit based on quorum-sensing will kill themselves in a controllable pattern upon certain cell density. In the media of different IPTG inducer concentration, we observed the growth and suicidal behavior of the Escherichia coli. Top10F' with such gene circuit, screened the mutants and determined their mutated loci. The results show that, with higher IPTG concentration, the more wild type bacteria were killed; as well the mutants emerged earlier and spread over the population more quickly. The sequence of plasmids in those mutants revealed that a transposon inserted into the luxR gene and therefore disrupted Quorum-Sensing of these individuals. Furthermore, the insertion sequence of the plasmid can solely result in the mutants escaping from suicide.
Culture Media ; chemistry ; DNA Transposable Elements ; genetics ; Escherichia coli ; genetics ; growth & development ; Gene Expression Regulation, Bacterial ; Genes, Synthetic ; genetics ; Genes, Transgenic, Suicide ; Isopropyl Thiogalactoside ; chemistry ; Mutation ; Quorum Sensing ; genetics ; Repressor Proteins ; genetics ; Trans-Activators ; genetics

Objective T0 investigate the effects of transforming growth factorβ1 ( TGFβ1 ) and its receptorβ2 (TGFβR2) gene single nucleotide polymorphisms on the risk of intracranial hemorrhage in patients with brain arteriovenous malformation (BAVM).Methods Fifty-three BAVM patients of both sexes aged 18-64 yr who were genetically unrelated native HAN of Guangdong province were divided into 2 groups:patients with and without intracranial hemorrhage ( n =30:23).Venous blood samples were collected and anti-coagulated with ethylene diaminetetraacetic acid for genomic DNA extraction.TGFβ1-509C/T (rs1800469) and TGFβR2 875A/G (rs3087465) gene SNPs were genotyped by using PCR-RFLP.Results There were no significant differences in genotype and frequency between the 2 groups.The G carrier frequency of the TGFβR2 genotype was significantly higher in patients with intracranial hemorrhage than in patients without intracranial hemonrhage.The G carrier of the TGFβR2 genotype was associated with intrarcranial hemorrhage in patients with BAVM.Conclusion TGFβ1 gene polymorphism is not relevant to the intracranial hemorrhage in patients with BAVM,but polymorphisms of TGFβR2 could be a risk factor.

Objective To study biologic effect of high radon exposure in non-uranium miners by measurements of serum levels of 1L-2, IL-6 and TNF-u and study on their gene polymorphism. Methods Serum levels of IL-2, IL-6 and TNF-αin the miners selected from a Yunnan-based copper mine were measured by ABC-ELISA. TNF-α (-308,G→A) genotypes were identified by RFLP-PCR, IL-2 (-330, T→G) genotypes by sequence analysis. Results Compared the miners with its control group, there were no statistical significance of the concentrations of serum IL-2 (F=0.71, P>0.05), IL-6 (F=1.09, P>0.05) and TNF-α(F=0.95,P>0.05). Frequencies of IL-2 (-330, T→G) genotypes (X2=0.02, P>0.05) and TNF-α(-308, G→A) genotype (x2= 2.21, P>0.05) were shown no statistical significance too. Conclusions Compared with the control group, concentrations of serum IL-2, IL-6 and TNF-n in miners working in the copper mine was lower, frequencies of genotypes of TNF-o (-308,A/A) was higher in the miners. But all the differences were not statistical significant.

Objective To investigate the effects of propofol on Ca2+ -induced mitochondrial dysfunction after focal cerebral ischemia-reperfusion(IR) injury in rats. Methods Eighty-four male Wistar ratsweighing 250-300 g were randomly divided into 4 groups (n= 21 each):group Ⅰ sham operation (group S); group Ⅱ IR; group Ⅲ CaCl2 and group Ⅳ propofol (group P). In group Ⅱ - Ⅳ focal cerebral IR was induced by 2 h middle cerebral artery occlusion (MCAO) followed by 24 h reperfusion. Neurological function was assessed at 2 h of ischemia and scored (0= no deficit, 5 = death). The animals were decapitated at the end of 24 h reperfusion. Left parietal and frontal cortex were immediately isolated and mitochondria were extracted. In group Ⅲ and Ⅳ mitochondria were incubated with 200 μmol/L CaCl2 for 5 min at 37 ℃, and were pretreated with propofol 200 μmol/L in group Ⅳ for 2 min before CaCl2. Morphological changes of mitochondria were examined by electron microscopy. Mitochondrial permeability transition pore (MPTP) activity was detected by ultraviolet visible absorption spectroscopy.Results Mitochondrial ultrastructure was normal in group Ⅰ . Significant mitochondrial swelling, disrupted cristae and membrane rupture were observed in group Ⅲ. Propofol significantly attenuated the Ca2+ -induced changes. The MPTP activity was significantly increased in group Ⅱ and Ⅲ as compared with group Ⅰ but were significantly decreased in group Ⅳ (propofol group). The decrease in MPTP activity was attenuated in group Ⅳ as compared with group Ⅲ. Conclusion Propofol can improve mitochondrial dysfunction induced by Ca2+ after focal cerebral IR by inhibiting MPTP opening in rats.

Objective To study the relationship between lung ventilation function of workers exposed to rare earth dust and their IL-2,IL-6 and TNF-α gene polymorphism.Methods TNF-α gene polymorphism were identified by RFLP-PCR,IL-2 and IL-6 gene polymorphisms were identified by PCR-CTPP analysis.Lung ventilation function was deteced by instrument of ventilation function.Results Compared with controls,there was no statistic significance in frequencies distribution of TNF-α gene polymorphism(X2=4.03,P＞0.05),IL-2 gene polymorphism(X2=2.21,P＞0.05)and IL-6 gene polymorphism(X2=1.05,P＞0.05).Compared with IL-2 gene wild type,IL-2 homozygote type increased the risk of lung ventilation dysfunction by 4.29 folds(95% CI 1.09～16.9).Conclusions Compared with controls,incidence of ventilation function of workers exposed to rare earth dust is in ascending trend.IL-2(G/G)gene type induces more serious inflammation reaction than the others.

Objective To evaluate the impact of preoperative renal artery embolization in renal cell carcinoma patients with venous tumor thrombus.Methods A total of 249 RCC patients with venous tumor thrombus underwent radical nephrectomy and thrombectormy in our hospital.Seventy-four patients received preoperative renal artery embolization while other 175 patients did not.The related items were analyzed.The tumor thrombus level was divided into 5 groups with American Mayo clinic classification system.Considering the significant difference in tumor situation and treatment strategies, we took the hepatic vein as a cut-off line, dividing patients into two subgroups, the early and advanced tumor thrombus groups.There were 208 patients in the early tumor thrombus group and 41 patients in the advanced group.The related items were analyzed respectively.Results Patients in the embolization group tended to have larger tumors and higher percentage of advanced tumor thrombus.For all patients, the embolization group had longer operation time [(4.8 ±2.1) h vs.(4.1 ±2.2) h ,P <0.05] and greater median blood loss (900ml vs 500 ml,P <0.05), compared to the non-embolization patients, and RAE did not show benefits on perioperative outcomes seemingly.However, subgroup analysis of patients with advanced tumor thrombus ( above hepatic vein) , in spite of the larger size of tumor, preoperative RAE showed significant benefits on reducing operation time [(7.0 ±1.7)h vs.(8.2 ±1.8)h, P<0.05)] and intraoperative blood loss (2 000 ml vs.3 000 ml, P<0.05) and decreasing blood transfusion (1 525 ml vs.2 050 ml ,P>0.05).Conclusion Preoperative RAE may be more appropriate for patients with advanced tumor thrombus because of its benefits in reducing operation time, intraoperative blood loss and elevating the operative security.

Objective To explore the intervention effect of active fraction of Angelica Sinensis Radix in mice under high altitude hypoxia condition. Methods Totally 72 healthy SPF mice were randomly divided into control group (K), model group (M), Rhodiola rosea group, and active fraction of Angelica Sinensis Radix groups (B, C, X). The mice were administerted corresponding treatment by gavage for 21 days. Control mice were given normal saline in same volume. From the 8th day, all mice excepted control mice were exposed to high altitude hypoxia cabin after 0.5 hour gavage treament. On the 22nd day, after got out of the cabin and their body weight were measured, mice were put to death through eyeball blood sampling to prepare splenic lymphocyte suspension. The proliferation and transformation capacities of lymphocyte cell and killing activity of NK cells were detected by MTT. The content of IL-2 in the serum of mice in each group were detected by ELISA. Results Compared with the control group, the body weight of mice, the proliferation and transformation capacities of lymphocyte cell, the killing activity of NK cells, and the content of IL-2 were all significantly decreased (P<0.05, P<0.01). Experiment tests showed that the proliferation and transformation abilities of lymphocyte cell and the killing activity of NK cells were all increased in the mice of group B, C, and X compared with those of the model group (P<0.05, P<0.01). The stimulate index of lymphocyte cell was raised after X intervention compared with those of the model group (P<0.05). The content of IL-2 in the serum was enhanced after intervention of active fraction C and X of Angelica Sinensis Radix compared with those of the model group (P<0.05, P<0.01). Conclusion Active fraction of Angelica Sinensis Radix shows increasing immunological function of mice exposed to hypoxia.

Objective To observe the variation of cerebral brain flow (CBF)and pathological characteristics in peripheral brain tissue of nidus after operation of brain arterivenous malformations (BAVM) and explore the mechanism and theaputic strategy of normal perfusion pressure breakdown (NPPB)after microsurgery. Methods 12 cases of BAVM that have received surgical resection were analyzed prospectively, and 8 cases of them were embolized with Onyx. The pathological characteristics of the nidus and peripheral brain tissue was observed with microscope and electron microscope. The variation of CBF in peripheral brain tissue of the nidus following microsurgical resection was observed by using Laser Doppuler Perfusion Imaging (LDPI) system. The monitering result of CBF in little meniugioma(n=6) during surgery was used as the control. Results There was small vessel expantion, neuron necrosis, gliocyte hyperplasia and blood brain barriar (BBB) destruction in peripheral brain tissue of BAVM nidus, the visibal brain tissue edema and inflammatory cell infiltration in peripheral brain tissue of the nidus and the revascularization in the emolized nidus vessels were observed after embolization with Onyx. There was significant change of CBF between pre-and post-operation (P<0.05),and after controlling depressurization during surgery was the increasing CBF step down (P<0.05). Conclusion The BBB breakdown and increasing CBF of peripheral brain tissue of the nidus may be the pathological foundation of brain hemorrhage and edema after BAVM microsurgical resection. So embolization before the operation, controlling depressuriation during and after surgery is the important methods for preventing and curing the NPPB of BAVM after microsurgery.