银染mRNA差异显示法的建立及其应用

以银染 m RNA差异显示方法对原发及转移灶胃癌标本总 RNA为研究对象进行银染差示分析和回收差异条带 ,从中获得系列差异表达片段 .随机选取 5个从原发性胃癌样品回收的表达条带 ,以取自体外培养胃癌细胞株的 RNA进行点杂交验证 ,均被证实为真实带 .对 2个差异表达片段进行分析、测序和 Gen Bank同源比较结果表明 :MGD1片段与肿瘤转移相关基因 MTA1完全同源 ,属胃癌转移相关基因 ;PGD2与胃癌转移抑制相关 ,并与细胞周期抑制蛋白 p2 7/ Kip1具 99%的同源性 .结果表明 ,银染差异显示法具有快速、直观、假阳性率低等优点 ,同时也为进一步研究胃癌转移的相关基因提供了新线

NMR Studies on Interactions between Diperoxovanadate and N-Substituted Picolinamide

为了探讨有机配体上取代基团对反应平衡的影响,在模拟生理条件下(0.15mol/LNaCl溶液),应用多核(1H,13C和51V)多维(COSY和DOSY)NMR以及变温技术等谱学方法研究双过氧钒配合物[OV(O2)2(D2O)]-/[OV(O2)2(HOD)]-与N-取代皮考啉酰胺的相互作用.它们反应性从强到弱的顺序为:N-甲基-皮考啉酰胺≈N-(2-羟乙基)-皮考啉酰胺>N-乙基-皮考啉酰胺>N-丙基-皮考啉酰胺,这说明了皮考啉酰胺N上取代基的电子效应影响反应.竞争配位导致一系列新的7配位的过氧钒物种生成,而利用上述谱学方法则有助于揭示此类相互作用体系的反应过程和配位机制.To understand the substituting effects of organic ligands on the reaction equilibrium, the interac- tions between diperoxovanadate complex [OV(O2)2(D2O)]-/[OV(O2)2(HOD)]- and a series of N-substituted picolinamide ligands in solution were explored using multinuclear (1H, 13C, and 51V) magnetic resonance, COSY, DOSY, and variable temperature NMR in 0.15 mol/L NaCl ionic medium for mimicking the physio- logical conditions. The order of reactive capability of the picolinamide-like ligands with [OV(O2)2(D2O)]-/ [OV(O2)2(HOD)]? is as follows: N-methylpicolinamide ≈ N-(2-hydroxyethyl)picolinamide > N-ethyl- picolinamide>N-propylpicolinamide. The substituting group influences the reactivity by an electron effect. Competitive coordination interactions result in a series of new seven-coordinated peroxovanadate species [OV(O2)2L]-(L=N-substituted picolinamide).973子课题(No.2003CB716005);; 国家自然科学基金(No.20772027);; 湖南省自然科学基金(No.06JJ30004);; 中国博士后科学基金(No.20070410805);; 卫生部(福建省)卫生教育联合攻关计划(No.3502Z20051027);; 厦门市重大疾病攻关研究基金(No.Wkj2005-2-019);; 固体表面物理化学国家重点实验室开放基金;; 湖南科技大学博士基金(No.E-55107)资助项目

NMR Studies on Interactions between Diperoxovanadate Complex and 3-Substituted Pyridines

为探讨有机配体上取代基团对反应平衡的影响,在模拟生理条件下(0.15mol/LNaCl溶液),应用多核(1H、13C和51V)多维(DOSY)以及变温NMR技术研究双过氧钒配合物[OV(O2)2(D2O)]-/[OV(O2)2(HOD)]-(简写为dpV)与3-取代吡啶的相互作用,并首次报道了一些物种的NMR化学位移.dpV与有机配体的反应性从强到弱的顺序为:吡啶>烟酸根>烟酸甲酰胺≈烟酸甲酯,这说明吡啶环上取代基影响反应平衡.竞争配位导致一系列新的6配位的过氧钒物种生成.密度泛函计算结果合理地解释了实验结果,并表明溶剂化效应在反应中起重要作用.To understand the substituting group effects of organic ligands on the reaction equilibrium, the interactions between a diperoxovanadate complex [OV(O2)2(D2O)]-/[OV(O2)2(HOD)]- (abbr. dpV) and a series of 3-substituted pyridines in solution were explored using multinuclear (1H, 13C, and 51V) magnetic resonance, DOSY, and variable temperature NMR in 0.15 mol/L NaCl ionic medium for mimicking the physiological condition. Some direct NMR data were given for the first time. The reactivity among the 3-substituted pyridines towards dpV takes the order of pyridine>nicotinate>N-methyl nicotinamide≈ methyl nicotinate. The competitive coordination results in the formation of a series of new six-coordinated peroxovanadate species [OV(O2)2L]n- (L=3-substituted pyridines, n=1 or 2). The results of density func-tional calculations provided a reasonable explanation of the relative reactivity of the 3-substituted pyridines. Solvation effects play an important role in these reactions.国家自然科学基金(Nos.20772027,20803020);; 973子课题(No.2003CB716005);; 湖南省自然科学基金(No.06JJ30004);; 中国博士后科学基金(No.20070410805);; 湖南省教育厅青年项目(No.06B028);; 固体表面物理化学国家重点实验室资助项目;; 湖南科技大学博士基金(No.E-55107)资助项

NMR and Theoretical Study on Interactions between Diperoxovanadate Complex and Substituted Pyridines

为探讨有机配体上取代基团对反应平衡的影响,在模拟生理条件下(0.15mol/L NaCl溶液),应用多核(1H,13C和51V)多维(DOSY)以及变温NMR技术研究双过氧钒配合物[OV(O2)2(D2O)]-/[OV(O2)2(HOD)]-(简写为bpV)与取代吡啶的相互作用.bpV与有机配体的反应性从强到弱的顺序为:皮考林酸根>异烟酸根>异烟酸甲酯>皮考林甲酯,这说明吡啶环上同一位置上的不同取代基团和同一取代基团在不同位置上都影响反应平衡,竞争配位导致一系列新的6配位(配体为异烟酸根和异烟酸甲酯)或7配位(配体为皮考林酸根和皮考林甲酯)的过氧钒物种[OV(O2)2L]n-(L=取代吡啶,n=1或2)生成,密度泛函计算结果较合理地解释了实验结果,并表明溶剂化在反应中起重要作用.To understand the substitution group effects of organic ligands on the reaction equilibrium,the interactions between diperoxovanadate complex [OV(O2)2(D2O)]-/[OV(O2)2(HOD)]-(abbr. bpV) and a series of substituted pyridines were explored using multinuclear(1H,13C,and 51V) magnetic resonance,DOSY,and variable temperature NMR in 0.15 mol/L NaCl ionic medium for mimicking the physiological condition. The reactivity order among the substituted pyridines and bpV is picolinate>isonicotinate> methyl isonicotinate>methyl picolinate. The competitive coordination results in the formation of a series of new six-coordinated(isonicotinate and methyl isonicotinate) or seven-coordinated(picolinate and methyl picolinate) peroxovanadate species [OV(O2)2L]n-(L=substituted pyridines,n=1 or 2). Both the different substitution groups at the same position and the same groups at the different substitution position affect these reactions. The results of density functional calculations provide someway a reasonable explanation for the relative reactivity of the substituted pyridines. Solvation effects play an important role in these reactions.国家自然科学基金(Nos.20772027,20803020);; 973子课题(No.2003CB716005);; 湖南省自然科学基金(No.06JJ30004);; 中国博士后科学基金(No.20070410805);; 湖南省教育厅青年项目(No.06B028);; 固体表面物理化学国家重点实验室资助项目;; 湖南科技大学博士基金(No.E-55107)资助项目

NMR Studies on Interactions between Diperoxovanadate and Imidazole-like Ligands

为探讨咪唑环上取代基团对反应平衡的影响,在模拟生理条件(0.15 mol·L~(-1)NaCl溶液)下,应用多核(~1H、~(13)C和~(51)V)、扩散排序谱(DOSY)以及变温NMR等谱学技术研究双过氧钒配合物NH_4[OV(O_2)_2{2-(2'-Pyri-dine)- [midazole}]·4H_2O(简写为bpV(Imi-Py))和咪唑类配体(咪唑、2-甲基-咪唑、4-甲基-咪唑和组氨酸)的相互作用,其从强到弱的顺序为咪唑≈4-甲基-咪唑>2-甲基-咪唑>组氨酸.研究结果表明,咪唑环上取代基团空间位阻对反应平衡产生较大影响,同时竞争配位的结果导致新的6配位过氧物种[OV(O_2)_2L]~-(L为咪唑类配体)的生成,当配体为4-甲基-咪唑和组氨酸时,生成的则是一对异构体.To understand the substituting effects of imidazole ring on the reaction equilibrium,the interactions between diperoxovanadate complex NH_4[OV(O_2)_2{2-(2'-Pyridine)-Imidazole}]·4H_2O (abbr.bpV(Imi-Py)) and a series of imidazole-like ligands (imidazole,2-methyl-imidazole,4-methyl-imidazole,and histidine) in solution were explored using multinuclear (~1H,~(13)C,and ~(51)V) magnetic resonance,diffusion ordered spectroscopy (DOSY),and variable temperature NMR in 0.15 mol·L~(-1) NaCl ionic medium for mimicking the physiological conditions.The experimental results indicated that the activities of bpV(Imi-Py) and organic ligands were as follows:imidazole≈4-methyl-imidazole>2-methyl- imidazole>histidine.The stedc effect of the organic ligands affects the reaction equilibrium.At the same time,new six- coordinated peroxovanadate species [OV(O_2)_2L]-(L=imidazole-like ligands) were formed due to the competitive coordination between 2-(2'-pyridyl)-imidazole and the imidazole-like ligands.When the ligand was 4-methyl- imidazole or histidine,a pair of isomers was formed.国家自然科学基金(20772027);; 973子课题(2003CB716005);; 湖南省自然科学基金(06JJ30004);; 中国博士后科学基金(20070410805);; 湖南省教育厅青年项目(068028);; 卫生部(福建省)卫生教育联合攻关计划(3502220051027);; 厦门市重大疾病攻关研究基金(Wkj2005-2-019);; 固体表面物理化学国家重点实验室开放基金和湖南科技大学博士基金(E55107)资

Transcription of turbot Scophthalmus maximus Mx gene induced by polyinosinic-polycytidylic acid given in different ways

以POlyI∶C(又称聚肌胞)为诱导剂,分别通过腹腔注射、浸泡和投喂3种途径诱导大菱鲆SCOPHTHAlMuS MAXIMuS体内抗病毒蛋白MX基因的转录,利用半定量rT-PCr方法检测干扰素下游基因-MX基因的转录水平来确定该诱导剂的诱导效果。结果显示,以上3种途径都能高效诱导MX蛋白MrnA的转录,均在48H之后达到高峰,其中以浸泡的方式更容易诱导MX基因转录,且在120H时仍保持较高水平。MX基因转录的时相变化证明了国产POlyI∶C可以通过多种途径诱导抗病毒蛋白MX的表达,为实际应用中确定用药途径提供了理论依据。另外,实验初步建立了半定量rT-PCr方法,为检测鱼体内干扰素的表达提供了技术方法。Transcription of turbot Mx protein confirmed to be an antivirus factor was induced by PolyI∶C with intraperitoneal injection,immersion and oral administration.Mx mRNA was tested by semi-quantitative RT-PCR to validate the effect of PolyI∶C’s induction.The results illustrated that all the three induction ways could effectively induce the transcription of Mx gene and the peak of Mx mRNA quantity appeared at 48h after PolyI∶C application.The immersion method seemed to be the most effective way to induce Mx mRNA,as Mx mRNA could last more than 120h at a high level.This experiment proved that the homemade PolyI∶C could effectively induce Mx mRNA transcription in different applications,which provided a reference to use PolyI∶C in aquaculture practice.国家863计划(2003AA622070);国家十一五科技支撑计划(2006BAD09A11);行业专项(nyhyzx07-046)共同资

土地流转面面观

自2008年10月中共十七届三中全会明确提出允许农地承包经营权“多种形式流转“以来,关于农地流转的讨论有渐成两级分化之势。今年全国“两会“上,吴邦国委员长在工作报告中,将土地管理法的修改和农村土地承包经营纠纷仲裁法的制定,列入本年的工作重点。3月12日,本刊和华

The catalytic esterification properties of PVA membranes filled with ironic sulfate

［中文文摘］通过在PVA膜中掺杂硫酸铁制得兼备催化和分离功能的酯化膜反应器 ,并用IR、DSC及SEM等测试方法分析了膜的形态结构及组成。实验结果表明 :硫酸铁的加入对膜的渗透性能和酯化反应的选择性及转化率的提高有重要作用 ;对于乙酸 /乙醇酯化反应体系 ,适宜的填充量为 2 0 %～ 30 % (质量比 )。［英文文摘］The membranes with both catalytic and separative properties were made by using the　hydrophilic alcohol (PVA) filled Lewis acid Ironic sulfate. The chemical composition , physical structure and morphology were studied by a variety of techniques , including infrared　spectrometry( IR) , differential scanning calorimeter (DSC) and scanning electron microscopy (SEM) etc. The experimental results showed that the addition of Fe3 (SO4) 2 was inportant to improve the flux of the membrane flux and the yield and selection of the esterification reac2tion , and the appropriate cotent of Fe3 (SO4) 2 for the alcohol/ acid esterification was 20 %～30 %(w/ w) .福建省自然科学基金 (C991 0 0 0 3) ；教育部骨干教师基金；教育部重点科技项目；教育部留学回国人员启动费资助

NMR Studies on Interactions between Diperoxovanadate and 1-Ethyl-1H-Imidazole

为探讨过氧钒配合物中有机配体对反应平衡的影响,在模拟生理条件下(0.15MOl·l-1nACl溶液),应用多核(1H、13C和51V)多维(COSy和HSQC)核磁共振(nMr)以及变温技术等谱学方法研究双过氧钒配合物[OV(O2)2l]-(l=d2O或HOd,与之配位的过氧钒物种简写为bPV)和[OV(O2)2ll′]n{-n=1-2,ll′=3-羟基-皮考啉酸根(3-OH-PIC),2-(2′-吡啶)-咪唑(Py-IM),1,10-邻菲啰啉(PHEn),与它们配位的含钒物种分别简写为bPV(3-OH-PIC)、bPV(Py-IM)和bPV(PHEn)}与n-乙基咪唑(n-ET-IM)的相互作用.实验结果表明,n-ET-IM与4种双过氧钒配合物反应性从强到弱的顺序为bPV>bPV(3-OH-PIC)>bPV(Py-IM)>bPV(PHEn).研究表明,金属中心上配体的配位能力、空间位阻和分子量等因素都对反应平衡产生较大的影响,同时竞争配位的结果导致新的6配位过氧物种[OV(O2)2(n-ET-IM)]-的生成.利用上述谱学方法有助于揭示此类相互作用体系的反应过程和配位方式.To understand the effects of organic ligands on the reaction equilibrium, interactions between a series of diperoxovanadate complexes [OV(O2)2L]- (L=D2O or HOD, the corresponding peroxovanadate species (bpV)) and [OV (O2)2LL′]n-{n=1-2; LL′ =3-hydroxyl-picolinate (3-OH-pic), 2-(2′-pyridine)-imidazole (py-im), 1,10-phenanthroline (phen), the corresponding peroxovanadate species bpV(3-OH-pic), bpV(py-im), and bpV(phen)}and 1-ethyl-1H-imidazole (N- Et-im) in solution were explored using multinuclear (1H, 13C, and 51V) magnetic resonance, COSY (correlated spectroscopy), HSQC (heteronuclear single quantum coherence) and variable temperature nuclear magnetic responance (NMR) using 0.15 mol·L-1 NaCl ionic medium to mimic physiological conditions.Experimental results indicated that the reactivity of these four complexes with 1-ethyl-1H-imidazole decreased as follows: bpV>bpV(3-OH-pic)>bpV(py-im)> bpV(phen).The coordinating ability, the steric effect, and the molecular weight of these organic ligands affected the reaction equilibrium.A new six-coordinated peroxovanadate species [OV(O2)2(N-Et-im)]- was formed because of competitive coordination.国家自然科学基金(20772027;20803020);中国博士后科学基金(20070410805);卫生部科学研究基金-福建省卫生教育联合攻关计划(WKJ2008-2-036);厦门市重大疾病攻关研究基金(3502Z20051027)资助项目---

NMR studies on interactions between diperoxovanadate and N-substituted picolinamide

To understand the substituting effects of organic ligands on the reaction equilibrium, the interactions between diperoxovanadate complex [OV(O-2)(2)(D2O)(-)/[OV(O-2)(2)(HOD)](-) and a series of N-substituted picolinamide ligands in solution were explored using multinuclear (H-1, C-13, and V-51) magnetic resonance, COSY, DOSY, and variable temperature NMR in 0.15 mol/L NaCl ionic medium for mimicking the physiological conditions. The order of reactive capability of the picolinamide-like ligands with [OV(O-2)(2)(D2O)](-)/[OV(O-2)(2)(HOD)](-) is as follows: N-methylpicolinamide approximate to N-(2-hydroxyethyl)picolinamide > N-ethylpicolinamide>N-propylpicolinamide. The substituting group influences the reactivity by an electron effect. Competitive coordination interactions result in a series of new seven-coordinated peroxovanadate species [OV(O-2)(2)L](-) (L=N-substituted picolinamide)