强直性脊椎炎患者HLA-B27与血清补体C3、C4及超敏C反应蛋白水平分析

目的:探讨强直性脊柱炎患者血清中的人类白细胞抗原B_27(HLA-B_27)、补体C_3、C_4、超敏C反应蛋白的水平变化在临床诊断中的意义。方法:选取早期强直性脊柱炎患者126例(患者组),及健康体检者57例(对照组),检测两组人类白细胞抗原B27与血清补体C_3、C_4、超敏C反应蛋白水平,并进行对比分析。结果:早期强直性脊柱炎(AS)患者人类白细胞抗原B27和血清补体C_3、C_4及超敏C反应蛋白水平明显高于对照组(P<0.05)。结论:强直性脊柱炎是与人类白细胞抗原B_27有较强相关性,可引起免疫炎症反应的疾病,联合检测人类白细胞抗原B_27与血清补体C_3、C4及超敏C反应蛋白水平,有助于强直性脊柱炎的早期诊断。

阿仑膦酸钠对前列腺癌患者胰岛素样生长因子1、胰岛素样生长因子结合蛋白3测定的意义

目的:探讨阿仑膦酸钠对前列腺癌患者胰岛素样生长因子1、胰岛素样生长因子结合蛋白3的影响。方法:选取前列腺癌患者76例,按照随机数字表法分为对照组和试验组各38例。对照组给予抗雄激素1周后予以钙元素治疗,试验组在对照组基础上予以阿仑膦酸钠治疗,两组共治疗12个月为一疗程。比较治疗前、治疗6个月后、治疗12个月骨密度、血清P1NP、β-CTX、IGF-1、IGFBP-3表达水平及不良反应状况。结果:与治疗前比较,对照组治疗12个月后腰椎、股骨颈、全髋部骨密度降低,血清P1NP、β-CTX表达升高,治疗6个月、12个月后血清IGF-1表达降低、血清IGFBP-3表达升高,试验组治疗12个月后腰椎、股骨颈、全髋部骨密度升高,血清P1NP、β-CTX表达降低,治疗6个月、12个月后血清IGF-1表达降低、血清IGFBP-3表达升高(P<0.05);与对照组比较,试验组治疗12个月后腰椎、股骨颈、全髋部骨密度较高,治疗6个月、12个月后血清P1NP、β-CTX表达较低,治疗6个月、12个月后血清IGF-1表达较低、血清IGFBP-3表达升高(P<0.05)。结论:阿仑膦酸钠有利于预防前列腺癌去势患者骨质流失现象,降低骨转换率,改善IGF系统,从而提高前列腺癌患者预后。

STK15 mRNA、STAT3-siRNA对胃癌细胞株表达实验研究

目的:研究中心体扩增激酶STK15以及信号传导与转录激活因子3(STAT3)小干扰RNA(siRNA)在胃癌中的表达。方法:采用Real-time荧光定量PCR技术对7例胃癌新鲜组织和2例正常胃粘膜组织中STK15的mRNA表达水平进行检测。采用体外转染实验以及荷瘤裸鼠体内实验评价STAT3-siRNA的体内外抗肿瘤效果。结果:STK15在胃癌组织的表达量明显高于正常胃黏膜组织,差异有统计学意义(P<0.01)。另外,STAT3-siRNA能够显著降低胃癌细胞的体外增殖能力。结论:中心体扩增是细胞癌变过程的重要事件,中心体的异常扩增是细胞恶性克隆的关键环节。STAT3-siRNA显著降低胃癌细胞的体内外增殖能力和克隆形成能力。

胸水CEA、CA125、CA153、CA199、铁蛋白检测在良恶性胸水鉴别诊断中的价值

目的:探讨胸水肿瘤标志物的检测在良恶性胸水鉴别诊断中的价值。方法:检测51例恶性胸水,42例良性胸水患者胸水中CEA、CA125、CA153、CA199、铁蛋白的浓度,应用统计学方法分析判断其在胸水良恶性诊断中的价值。结果:恶性组胸水中五项肿瘤标志物平均水平均显著高于良性组,差异有显著性。结论:胸水CEA、CA125、CA153、CA199、铁蛋白检测在良恶性胸水鉴别诊断中有重要意义。

C-terminal 76 Amino Acids of eRF3 Are Not Required for the Binding of Release Factor eRF1a from Euplotes octocarinatus

Termination of translation in eukaryotes requires two polypeptide chain-release factors, eRF1 and eRF3. eRF1 recognizes stop signals, whereas eRF3 is a ribosome-dependent and eRFl-dependent GTPase. Polypeptide release factor eRF3 consists of N-terminal variable region and C-terminal conserved part. C-terminal part of eRF3 is responsible for termination of the translation, In the present study, the C-terminal of Euplotes octocarinatus eRF3 （eRF3C） and truncate eRF3C lacking 76 amino acids in C-terminal （eRF3Ct） were expressed in Escherichia coll. The recombinant GST-eRF3C and GST-eRF3Ct polypeptides were purifled by affinity chromatography using glutathione Sepharose 4B column. After enzymatic cleavage of GST tail, the eRF3C and eRF3Ct protein were obtained. Pull-down analysis showed that the recombinant GST-eRF3C and GST-eRF3Ct polypeptides interacted with E. octocarinatus polypeptide chain release factor eRF1a. This result suggested that the C-terminal of eRF3 having 76 amino acids were not required for the binding of eRFla in Euplotes octocarinatus.

Non-isothermal kinetic analysis of thermal dehydration of La_2(CO_3)_3·3.4H_2O in air

The single phase La2（CO3）3·3.4H2 O was synthesized by hydrothermal method. The thermal decomposition and intermediates and final solid products of La2（CO3）3·3.4H2O from 30 to 1000 °C were characterized by XRD, FTIR and DTA-TG. The kinetics of dehydration of La2（CO3）3·3.4H2O in the temperature range of 30-366 °C was investigated under non-isothermal conditions. Flynn-Wall-Ozawa and Friedman isoconversion methods were used to calculate the activation energy and analyze the reaction steps; multivariate non-linear regression program was applied to determine the most probable mechanism and the kinetic parameters. The results show that the thermal dehydration of La2（CO3）3·3.4H2O is a kind of three-step competitive reaction, and controlled by an n-order initial reaction followed by n-order competitive reaction（FnFnFn model）. The activation energy matching with the most probable model is close to value obtained by Friedman method. The fitting curves match the original TG-DTG curves very well.

Transglutaminase 3 expression in C57BL/6J mouse embryo epidermis and the correlation with its differentiation

Epidermal-type transglutaminase 3 (TGM3) is involved in the cross-linking of structural proteins to form the cornifiedenvelope in the epidermis. In the present study, we detected the expression of TGM3 in the mouse embryo using RT-PCR.TGM3 mRNA is weakly presented from E11.5 to E14.5 and increases significantly from E15.5 to birth. Then wedetermined the spatial and temporal expression pattern of TGM3 in the skin and other organs by in situ hybridization. Wefound a deprivation of TGM3 in skin at E11.5, while a rich supply in periderm cells and a weak expression in basal cellsfrom E12.5 to E14.5. From the period of E15.5 to E16.5, after keratinization in the epidermis, TGM3 was expressed inthe granular and cornified layers. The electron microscopic observation of the C57BL/6J mouse limb bud skin develop-ment provided several morphological evidences for the epidermal differentiation. The above findings suggest that theexpression of TGM3 plays a important role in the epidermis differentiation in embryogenesis.

Synergistic suppression of the PI3K inhibitor CAL-101 with bortezomib on mantle cell lymphoma growth

Objective: To investigate the effects of CAL-101, particularly when combined with bortezomib(BTZ) on mantle cell lymphoma(MCL) cells, and to explore its relative mechanisms.Methods: MTT assay was applied to detect the inhibitory effects of different concentrations of CAL-101. MCL cells were divided into four groups: control group, CAL-101 group, BTZ group, and CAL-101/BTZ group. The expression of PI3K-p110σ, AKT, ERK, p-AKT and p-ERK were detected by Western blot. The apoptosis rates of CAL-101 group, BTZ group, and combination group were detected by flow cytometry. The location changes of nuclear factor kappa-B(NF-κB) of 4 groups was investigated by NF-κB Kit exploring. Western blot was applied to detect the levels of caspase-3 and the phosphorylation of AKT in different groups. Results: CAL-101 dose- and time-dependently induced reduction in MCL cell viability. CAL-101 combined with BTZ enhanced the reduction in cell viability and apoptosis. Western blot analysis showed that CAL-101 significantly blocked the PI3K/AKT and ERK signaling pathway in MCL cells. The combination therapy contributed to the inactivation of NF-κB and AKT in MCL cell lines. However, cleaved caspase-3 was up-regulated after combined treatment. Conclusion: Our study showed that PI3K/p110σ is a novel therapeutic target in MCL, and the underlying mechanism could be the blocking of the PI3K/AKT and ERK signaling pathways. These findings provided a basis for clinical evaluation of CAL-101 and a rationale for its application in combination therapy, particularly with BTZ.

A 3-D DDA damage analysis of brick masonry buildings under the impact of boulders in mountainous areas

In mountainous areas, geological disasters carrying large boulders can cause severe damage to the widely used masonry buildings due to the high impact forces. To better understand the damage of brick masonry buildings under the impact of boulders, a "block-joint" model is developed using threedimensional discontinuous deformation analysis(3-D DDA) to simulate the behaviour of the "brick-mortar" structure. The "block-joint" model is used to capture not only the large displacement and deformation of individual bricks but also the large-scale sliding and opening along the mortar between the bricks. The linear elastic constitutive model is applied to account for the non-plastic deformation behaviour of brick materials. Furthermore, the mechanical characteristics of the mortar are represented using the Mohr-Coulomb and Drucker-Prager criteria. To propose safe structural design schemes and effective reinforcement for brick masonry buildings, seven construction techniques are considered, includingdifferent grades of brick and mortar, effective shear areas and reinforced members. The proposed 3-D DDA model is used to analyse the velocity distribution and the key point displacements of the brick masonry building under the impact of boulders. The results show that upgrading the brick and mortar, increasing the wall thickness, making full use of the wall thickness, and adding a circular beam and structural column are very effective approaches for improving the impact resistance of brick masonry buildings.

Expression Analysis of 14-3-3 Gene in Tall Fescue under Several Abiotic Stresses

To study the functions of 14-3-3 gene family in tall fescue, the potential functions of 13 14-3-3 proteins in Arabidopsis were investigated by bioinformatic analysis. Based on the sequences of 14-3-3 genes in tall fescue by transcriptome and proteomic sequencing, the full-length cDNA sequences of 4 14-3-3 genes in tall fescue were obtained. Their sequences were aligned by Clustal W2. The results showed that the genetic relationships between 14-3-3A and 14-3-3D, 14-3-3B and 14-3-3C are closer, and their main structures are very conservative. The changes in expression levels of 14-3-3 genes under low nitrogen, drought, high temperature and high salt stresses were investigated by fluorescence quantitative PCR. The expres- sion level of 14-3-3A makes responses to low nitrogen, drought, high temperature and high salt stresses; the expression levels of other genes also make responses to abiotic stresses in varying degrees, but the relevant response mechanisms are not exactly the same. Therefore, it is speculated that the 14-3-3 gene family regu- lates stress resistance of plants through different pathways, and functional differenti- ation occurs during its evolution.

Mixed P3HT/PCBM Organic Thin-Film Transistors： Relation between Morphology and Electrical Characteristics

The mixed P3HT （poly（3-hexylthiophene）） and [6,6]-PCBM （phenyl C61-butyric acid methyl ester） organic thin films were investigated for electronic structure using UV-Vis spectrophotometer and PESA （photo-electron spectroscopy in air）. Furthermore, ESR （electron spin resonance） and AFM （atomic force microscopy） were used to investigate the surface morphology and molecular orientation, respectively. ESR analysis indicated the molecular orientation of the P3HT crystalline in the blend thin films, which the crystalline oriented normal to the substrate with distribution of 35°. AFM images indicated that the surface morphology of P3HT film was affected by the presence of PCBM nanoparticles. Solution-processed OTFTs （organic thin-film transistors） based on P3HT/PCBM blend thin film in a top source-drain contact structure was fabricated, and the electrical characteristics of the devices were also investigated. A unipolar property with p-channel characteristics were obtained in glove box measurement.

Product Vibrational State Distributions of F+CH_(3)OH Reaction on Full-Dimensional Accurate Potential Energy Surface

The hydrogen abstraction reaction of methanol with fluorine atoms can produce HF and CH_(3)O or CH_(2)OH radicals,which are important in the environment,combustion,radiation,and interstellar chemistry.In this work,the dynamics of this typical reaction is investigated by the quasi-classical trajectory method based on a recently developed globally accurate full-dimensional potential energy surface.Particularly,the vibrational state distributions of the polyatomic products CH_(3)O and CH_(2)OH are determined by using the normal mode analysis method.It is found that CH_(3)O and CH_(2)OH are dominantly populated in the ground state when the reactants are at the ground ro-vibrational state.The OH stretching mode,torsional mode,H_(2)CO out-of-plane bending mode and their combination bands in the CH_(2)OH product can be effectively excited once the OH stretching mode of the reactant CH_(3)OH is excited to the first vibrationally excited state.Most of the available energy flows into the HF vibrational energy and the translational energy in both channels,while the radical products,CH_(3)O or CH_(2)OH,receive a small amount of energy,consistent with experiment,which is an indication of its spectator nature.

静脉营养对重症脓毒症患者血氨基酸谱及免疫的影响

目的:探讨重症脓毒症患者游离氨基酸谱、免疫功能的变化及氨基酸静脉营养对游离氨基酸谱、免疫功能的影响。方法:将2005年2月～10月收治本院ICU的40例重症脓毒症患者随机分为2组,对照组给予葡萄糖注射液+20%中长链脂肪乳剂250ml/d,氨基酸组给予葡萄糖注射液+20%中长链脂肪乳剂250ml+8.5%复方氨基酸注射液750～1000ml/d,3d后测定血游离氨基酸、免疫球蛋白和补体,同时测得20名健康人的数值作为对照。结果:对照组患者血缬氨酸、亮氨酸、异亮氨酸、丙氨酸、丝氨酸、谷氨酸、组氨酸、脯氨酸及甘氨酸值低于健康人组,氨基酸组患者大部分氨基酸值得到提高,但丙氨酸、丝氨酸、谷氨酸、组氨酸和脯氨酸仍低于健康人组;两组患者的苏氨酸、半胱氨酸及苯丙氨酸/酪氨酸比值均高于健康人组,支链氨基酸与芳香族氨基酸的比值均低于健康人组。对照组IgM、补体C3、C4均低于健康人组,氨基酸组IgM和补体C3、C4均高于对照组,但IgM仍低于健康人组。结论:脓毒血症患者大部分血游离氨基酸水平低于健康人,同时存在氨基酸代谢障碍;补充氨基酸可以提高机体的免疫功能及大部分血氨基酸水平。

Expression and Phylogenetic Analysis of Pea Actin Isoforms

Pea ( Pisum sativum Linn.) actin gene family contains at least three isoforms (PEAcⅠ, PEAcⅡand PEAcⅢ), and the DNA sequence of these isoforms show high similarity in the coding regions and significant divergence in the untranslated regions. RT_PCR and Southern blotting using 3′_untranslated region (3′_UTR) as specific probe revealed that pea isoactin genes were expressed in roots, stems, leaves, tendrils, pollen and juvenile siliques, but displayed different patterns of transcript accumulation. Two_fold serial dilution electrophoresis showed PEAcⅠ mRNA preferentially accumulated in rapidly developing tissues: it peaked in seven days' stem; remained at a rather high level in leaves within a month but decreased significantly later; varied a little in tendrils and reached a median and a very low level respectively in juvenile siliques and in pollen. PEAcⅡ displayed somewhat similar expression pattern to PEAcⅠ. The observed differences in sequences and transcript accumulation patterns suggest that the individual pea actin genes may differ in their transcriptional regulation and cellular function. Phylogenetic tree of actins showed that pea actin isoforms are as diverged from each other as they are from other plant actins, and pea actins might have originated from a common ancestor before the divergence of the dicot and monocot plants.

Arg188Gln(G/A)突变对犬尿氨酸酶活性的影响

目的:验证犬尿氨酸酶(KYNU)Arg188Gln(G/A)突变能否改变KYNU的活性。方法:抽提人肝脏细胞的总RNA,通过RT-PCR法获得KYNU基因全长cDNA,以KYNU基因Arg188Gln位点附近序列为模板设计定点突变引物,完成Arg188Gln(G/A)的定点突变,将突变型和野生型KYNU基因克隆到pcDNA载体质粒中,获得野生型和突变型pcDNA-KYNU重组表达质粒,经酶切鉴定和测序验证后转染HEK293细胞,蛋白质印迹法检测KYNU在细胞中的表达,用高效液相色谱法检测HEK293细胞的KYNU活性。结果:野生型和突变型pcDNA-KYNU重组质粒在HEK293细胞中均能表达有活性的KYNU,KYNU的米氏常数分别为(9.833±0.513)μmol/L和(29.900±0.265)μmol/L,最大酶促反应速率分别为(0·700±0.096)nmol·mg^(-1)·min^(-1)和(0.084±0.003)nmol·mg^(-1)·min^(-1),差异均有统计学意义(均P<0.05)。结论:Arg188Gln(G/A)突变可以减弱KYNU的活性。

Cobalt recovery and microspherical cobalt tetroxide preparation from ammonia leaching solution of spent lithium-ion batteries

A process for recovering Co and preparing microspherical Co_(3)O_(4)through NH_(3)distillation and phase transformation from ammoniacal solution was investigated.As the basis of thermodynamics,the solubility of Co at different NH_(3)and CO_(3)^(2-)concentrations was studied,and then the effects of different NH_(3)distillation conditions on Co recovery rate were discussed.Over 94%Co and 96%NH_(3)were recovered through NH_(3)distillation,and the cobalt was precipitated in form of cobalt carbonate ammonium compound salt.Through the analysis of the formation mechanism of the precursor,the precipitation process of cobalt could be divided into two stages,and the cobalt precipitation rate was significantly accelerated in the second stage.In phase transformation,the effect of temperature on the roasted product was investigated.The microspherical Co_(3)O_(4)with a microporous structure was prepared at 300°C,and Co_(3)O_(4)with a mesoporous structure and high-spin state was obtained at 750°C.

Preparation of BaAl_2O_4 by microwave sintering

The desulfurater(BaAl2O4) was successfully synthesized with BaCO3 and Al(OH)3 powders as raw materials by microwave sintering method.The mass loss of raw materials and the characterization of the outcome were investigated by means of TG-DSC,XRD and optical microscopy.The reaction mechanism was discussed.The experimental results show that synthesized BaAl2O4 by microwave sintering method is feasible.Compared with conventional sintering method,microwave sintering is a better way to synthesize BaAl2O4 with advantages of low temperature sintering,short time sintering and high synthesis rate.