急性颅脑损伤患者外周血C-反应蛋白和IL-6水平的

目的检测急性颅脑损伤后患者外周血C-反应蛋白(CRP)和IL-6水平的动态变化,探讨其临床意义.方法选择77例不同病情的急性颅脑损伤患者作为研究对象,32例健康体检者作为对照组.采用免疫浊度法检测血浆CRP,ELISA法检测IL-6水平.结果急性颅脑损伤患者血浆CRP和IL-6水平均显著高于正常人对照组(P<0.01),且患者CRP和IL-6水平与病情呈正相关;各组患者在入院当天IL-6和CRP水平有所升高,并在入院1 d后继续升高,IL-6于3 d达最高水平,以后逐渐下降,CRP在1 d达高峰,随即开始下降;患者IL-6水平与CRP呈正相关(r＝0.556,P<0.01).结论急性颅脑损伤患者外周血IL-6和CRP水平的变化与病情严重程度密切相关,IL-6在急性颅脑损伤中可能通过促进肝脏合成CRP,在一定程度上对神经系统起保护作用.     

甘蓝型油菜种子性状间的相关与通径分析

该研究对108份甘蓝型油菜骨干系材料的含油量、蛋白质含量与种子色素含量进行分析,结果表明：含油量与蛋白质含量、种皮色素含量及胚花色素含量、总酚含量和黑色素含量存在极显著负相关,蛋白质含量与种皮和胚色素含量均达到极显著正相关或负相关,与黑色素含量存在极显著正相关;通径分析表明,种胚类黄酮含量与种子含油量的直接通径系数值都较大,说明对种子含油量的贡献较大;蛋白质含量、种胚总酚含量和种皮黑色素含量与种子含油量的直接通径系数为负值,说明它们对种子含油量的贡献为负效应.种胚总酚含量和黑色素含量与种子蛋白质含量的直接通径系数为较大的正值,说明它们对种子蛋白质含量的贡献较大,为正效应;种胚类黄酮含量和种皮黑色素含量与种子蛋白质含量的直接通径系数为负值,说明它们对种子蛋白质含量的贡献为负效应.油菜籽的含油量提高受到蛋白质含量和种皮、胚色素的影响,蛋白质在合成过程中可能与油分合成竞争底物,与黄酮类化合物的合成代谢途径密切相关,种皮和胚色素含量分别在2个环境中相关性不一致,表明种皮和胚色素合成可能受不同遗传体系控制,色素在其合成代谢途径过程中的底物竞争性可能不同.     

Cholecystokinin Activity of Urine

Withdrawal and subsequent restoration of deoxyriboside to a deoxyriboside-requiring mutant leads to synchronous cell division. There is a time lag between restoration and the first synchronous division; during this time the amount of deoxyribonucleic acid (DNA) per cell increases in stepwise fashion, and tnass per cell increases linearly with time. The onset of cell division is heralded by cessation of DNA synthesis and an abrupt increase in rate of mass synthesis.     

基于次生物质对紫玉米花青素合成模型预测(英文)

通过对与紫玉米花青素合成相关的次生物质总酚、类黄酮、苯丙氨酸解氨酶(PAL)、多酚氧化酶(PPO)的测定,建立了紫玉米花青素合成的最优多元线性回归模型为y=4.38386-0.20545x1+5.479638x2+0.195575x4。经标准偏回系数归检验得出:总酚含量与花青素含量呈负相关,对花青素合成的相对影响为-42.7%;类黄酮含量和PPO活性与花青素含量均呈正相关,对花青素合成的相对影响分别为71.45%和73.32%,且均达到了极显著水平;而PAL活性与花色素合成的相关性不显著。该模型的建立能够为花青素的实验室合成提供理论基础,从而也可为用细胞培养的方法大量生产花青素提供理论依据。     

活性中间体芳香羟胺的研究进展

芳香羟胺是合成农药、医药等的重要中间体,其有诸多制备方法。文章着重介绍国内外以金属为还原剂,选择还原芳香硝基化合物制备芳香羟胺的研究进展,并分析此方法的优缺点,以期推动此方面的研究及应用。     

水稻发育胚乳中淀粉的积累及淀粉合成的酶活性变化

利用４个粒重相近品种（组合）,对胚乳发育期间蔗糖、可溶性糖的淀粉含量、籽粒灌浆速率及与淀粉合成有关的６个酶活性的变化进行了研究。结果表明,品种间及不同剪叶处理间强势粒的淀粉积累和酶活性差异较小,而弱势粒差异明显。蔗糖合成酶,ＡＤＰＧ焦磷酸化酶、可溶态淀粉合成酶、淀粉分枝酶（Ｑ酶）、活性的变化与灌浆速率曲线十分吻合,相关性极显,而ＵＤＰＧ焦磷酸化酶活性变化与灌浆速率曲线吻合性较差。结合态淀粉合成酶     

Protein synthesis in the hippocampal pyramidal cells of rats during a behavioral test

Protein synthesis was studied in the pyramidal nerve cells of the CA3 region in the hippocampus of rats uring a behavioral test involving transfer of handedness. A new electrophoretic technique was used for separation of 10(-7) to 10(-9) gram of protein and radiometric determination of the various protein fractions. After interventricular administration of (3)H-leucine, protein synthesis of two fast-moving fractions was significantly higher bilaterally in the hippocampus of the trained rats. There was also a trend to lateralization of the highest protein synthesis to the learning side.     

Heterozygous Beta thalassemia: balanced globin synthesis in bone marrow cells

In two patients with heterozygous beta thalassemia the rates of synthesis of the alpha and beta chains of hemoglobin were equal in nucleated red cell precursors, although beta chain synthesis was reduced in peripheral blood reticulocytes. This finding suggests a relative instability of beta chain messenger RNA in beta thalassemia.     

拟南芥甘油-3-磷酸乙酰转移酶家族研究进展

甘油-3-磷酸乙酰转移酶催化甘油-3-磷酸酯与脂肪酸发生酰化反应。在拟南芥的甘油-3-磷酸乙酰转移酶家族中包括8个成员。介绍拟南芥的甘油-3-磷酸乙酰转移酶在甘油脂类合成以及在角质和木栓质合成的研究进展,并进一步展望甘油-3-磷酸乙酰转移酶今后在基础研究及农作物遗传育种上可能发挥的重要作用。     

水稻胚乳贮藏物代谢相关基因响应花后高温胁迫的微阵列分析

【目的】揭示花后高温条件下水稻灌浆过程中胚乳淀粉和蛋白贮藏物代谢相关基因的表达谱,并阐明部分重要功能基因对花后高温胁迫的响应表达模式。【方法】利用人工气候箱设高温(日均温度32℃,日最高温36℃/日最低温28℃)和适温(日均温度22℃,日最高温26℃/日最低温18℃)2个温度处理,并在水稻开花后的不同时期取样,对水稻胚乳贮藏物代谢各类相关基因的表达谱与表达模式进行高通量的cDNA微阵列检测。【结果】在水稻胚乳贮藏物代谢的相关基因中,以对高温胁迫响应表现较迟钝的基因居多,其高温处理与低温处理之间的杂交信号(nARVOL)比值(称R值)大致在0.8—1.2,但随高温处理时间的持续,呈上调或下调差异表达的基因数量均有明显增加;花后高温对胚乳糖代谢和淀粉合成类基因表达的调控效应,不仅随各个基因的功能类型、代谢途径和灌浆进程的差别变化而异,而且其表达丰度及其上调或下调幅度在很大程度上还与该功能基因的同工型(或酶亚基)有关;高温处理下水稻胚乳中的谷蛋白、醇溶蛋白和球蛋白类基因多呈下调表达特征,但也会随其所调控的蛋白亚基组分的不同而异,从而对胚乳贮藏蛋白的亚基构成和组分变化产生较大影响;与胚乳白贮藏物代谢密切相关的糖信号传导类基因、核糖体蛋白类基因和逆境防御蛋白类基因普遍比直接参与胚乳贮藏物合成路径的功能基因对高温胁迫响应表现敏感。【结论】花后高温胁迫对水稻胚乳灌浆贮藏物代谢的调控相当复杂,涉及到众多的功能基因位点。     

Molecular recognition and metal ion template synthesis

Methods for the design and synthesis of ligands intended to be specific for a metal ion have been a recent chemical development. This article describes how this process can be inverted so that the specifics of the coordination environment around the metal ion can be used as a template in large-scale ligand synthesis. The synthesis of macrobicyclic ligands for ferric ion has been accomplished by using active esters of catechol ligands in which catecholate coordination to iron is a prelude to the organic chemical reactions that link the coordination subunits together into one ligand system surrounding a central metal ion coordination site. The lanthanide(III) ions, which are among the most labile metal ions known, have coordination numbers of 8 or higher, and thus their encapsulation into a macrobicyclic structure is a challenging problem. Lanthanide amine complexes have been used as metal templates in the synthesis of such macrobicyclic lanthanide complexes. There is evidence that such a complex is inert to exchange in aqueous solution.     

EFFECT OF SPINAL FLUID FROM PATIENTS WITH MYASTHENIA GRAVIS ON THE SYNTHESIS OF ACETYLCHOLINE IN VITRO

Human spinal fluid is a more favorable medium to further the synthesis of acetylcholine in vitro, using enzyme obtained from frog brain, than is serum. Also, since less acetylcholine was synthesized in the presence of spinal fluid from patients with myasthenia gravis than spinal fluid of control subjects, it is probable that at least some of the factors responsible for the decrease and increase of the synthesis of acetylcholine pass into the spinal fluid.     

不同根系调节剂对烟草烟碱及钾素分布的动态影响

采用盆栽试验,研究了ＡＢＴ４,ＦＡ及ＦｅＳＯ４ ３种营养调节剂对烟草根系活力、烟碱合成、Ｋ素吸收与分布的影响,结果表明,烟草根系活力的动态变化呈双峰曲线,根系及叶片的烟碱含量与根系活力的趋势相同,即在移栽后３０ｄ有一高峰,然后缓慢下降,到移栽后７０ｄ又开始上升,烟草根、茎、叶中Ｋ素含量的变化趋势一致,在整个生育期内均呈下降趋势,调根剂ＡＢＴ４,ＦＡ,ＦｅＳＯ４对根系活力、Ｋ素吸收和烟碱合成均有促进     

Lymphocytic responses to streptococcal antigens in glomerulonephritic patients

The lymphocytes from patients with progressive glomerulonephritis showed significant inhibition of cell migration in the presence of group A streptococcal particulate antigens. Marked increases in the level of DNA synthesis of these lymphocytes were also observed after contact with these antigens. Lymphocytes from patients with unrelated renal disorders exhibited minimum reactivity to streptococcal antigens.     

猪苓多糖对小鼠腹腔巨噬细胞一氧化氮生成、iNOS活性和细胞内还原型谷胱甘肽含量的影响

目的 :观察猪苓多糖 (PPS)对小鼠腹腔巨噬细胞一氧化氮 (NO)生成及其免疫调节作用和抗肿瘤作用机制。方法 :采用Griess反应、荧光法和DTNB比色法分别测定不同剂量的PPS作用小鼠腹腔巨噬细胞的NO生成量、诱导型一氧化氮合酶 (iNOS)活性及细胞内还原性谷胱甘肽 (GSH)含量的变化。结果 :PPS能使小鼠腹腔巨噬细胞NO生成增加 ,i NOS活性增高 ,并呈作用剂量依赖关系 ;PPS在刺激小鼠腹腔巨噬细胞NO合成同时 ,伴有细胞内GSH水平的降低 ,呈负相关 (P <0 .0 5 )。结论 :PPS能提高小鼠腹腔巨噬细胞iNOS活性 ,增加NO合成 ,消耗细胞内的GSH。提示细胞内GSH可能起到调节巨噬细胞NO生成和保护宿主细胞免受NO介导的细胞毒作用     

Translation in mammalian cells of a gene linked to the poliovirus 5' noncoding region

The central portion (region P) of the 742-nucleotide noncoding 5' end of poliovirus allows the RNA to initiate protein synthesis in the absence of the usual 5' 7-methylguanosine capping group. Poliovirus 5' noncoding region was fused to a reporter gene and transfected into cells. There was extensive augmentation of the expression of this gene by poliovirus-mediated inhibition of cap-dependent protein synthesis. That the construct initiated in a cap-independent manner was verified through in vitro experiments. Small lesions throughout region P blocked its initiation function, implying that a coherent functional unit, hundreds of nucleotides long, is responsible for cap-independent initiation by poliovirus RNA.     

人类3个多肽基因的人工合成和对人工基因合成意义的探讨

本文报道了胰岛素A,B链基因,人表皮生长因子基因和人α心钠素基因的人工合成。人工合成是在DNA合成仪上完成的,先合成上述基因的平均为60个核苷酸的各寡核苷酸片段,经过对各片段的纯化、磷酸化和连接,得到上述多肽基因。并进行了电泳检测。人工基因合成的重要意义在于可以正确地、高效地合成基因工程所需的基因,是获得在原核生物中表达的多肽基因的主要途径,并可将重组DNA和表达所需的碱基顺序同时组合在合成的基因中。人工基因合成有广泛的应用前途和价值。     

电针联合膀胱综合训练对骶上脊髓损伤后神经源性膀胱(逼尿肌反射亢进型)患者膀胱功能的影响

目的 观察电针联合膀胱综合训练对骶上脊髓损伤后神经源性膀胱（逼尿肌反射亢进型）患者膀胱功能的影响。方法 采用随机数字表法将50例骶上脊髓损伤后神经源性膀胱（逼尿肌反射亢进型）患者分为对照组及观察组,每组25例。对照组患者给予膀胱综合训练方法,观察组患者在膀胱综合训练的基础上增加电针治疗。于治疗前、治疗4周后通过24 h自主排尿次数、尿动力学检查、生活质量精简问卷（SQLP）评分评价2组患者膀胱功能情况。结果 治疗4周后,观察组患者24 h自主排尿次数、充盈期逼尿肌压力、残余尿量及SQLP评分均明显低于对照组水平,而最大膀胱测压容积及最大尿流率均明显高于对照组水平,差异均具有统计学意义（P<0.05）。结论 电针联合膀胱综合训练可有效改善骶上脊髓损伤后神经源性膀胱（逼尿肌反射亢进型）患者膀胱功能,提高生活质量,该疗法值得临床推广。     

乙酰辅酶A羧化酶(ACC)的结构与功能

乙酰辅酶A羧化酶(ACC)催化乙酰辅酶A形成丙二酸单酰辅酶A的羧化作用,是在脂肪酸合成和代谢中起重要作用的中间代谢物。ACC包括ACCα和ACCβ两种形式,被不同的基因编码。ACC(α265 kDa)主要在脂肪生成活跃的肝脏、脂肪组织和乳腺中表达。ACC(β275 kDa)主要在β-氧化作为主要能量来源的骨骼肌和心脏中表达。对ACC的结构特点和基本功能进行了探讨。