异细胞的

Covalent modification of four isolated alkannin derivatives (alkannin, acetylalkannin,β,β dimethylacrylalkannin and β acetoxyisovalerylalkannin, respectively) on rabbit muscle latate dehydrogenase and yeast Alcohol Dehydrogenase has been studied.

为研究紫草萘醌类化合物的细胞毒性作用机制，从新疆软紫草根中分离出四种紫草萘醌类化合物β，β二甲基丙烯酰阿卡宁(1)，乙酰阿卡宁(2 )，β乙酰氧基异戊酰阿卡宁(3)和阿卡宁(4)。

AIM:The amnion is a kind of natural extracellular matrix, which has low antigenicity and small reject reaction.

目的：羊膜是一种天然的细胞外基质，具有抗原性低、排异反应小特点。

Results:(1)Dietary selenium might inhibit the formation of aneuploid cells in Wistar rats glandular stom-ach.

结果：(1硒能抑制MNNG所致大鼠腺胃粘膜细胞异倍体的形成。

The peroxisome proliferator-activated receptors play an important role in adipocyte differentiation and fatty acid metabolism, activation of PPAR may induce the differentiation of adipocyte,influence the expression of genes involved in lipogenesis and fatty acid oxidation,eventually lessen ectopic fat accumulation and improve the impaired insulin signaling,so the medicine which targets to the control point of FFA metabolism would be hopeful in the treatment of a cluster of metabolic abnormalities resulted from insulin resistance.

过氧化物酶体增殖物激活受体在脂肪细胞分化、脂肪酸代谢中起重要作用，PPAR及其所调控基因的激活可促进脂肪细胞分化、减少脂质产生、增加脂肪酸氧化，从而减少脂质的异位沉积，进一步改善损伤的胰岛素信号转导通路，逆转胰岛素抵抗。针对脂肪酸合成及氧化的关键调控点的药物可能是今后治疗胰岛素抵抗引发的一系列代谢异常的新的靶点。关键词过氧化物酶体增殖物激活受体；脂肪酸代谢；胰岛素抵抗

Comparison of brucine and nitrogen oxides isobrucine in their anticancer and antioxidation effect.

马钱子碱与异马钱子碱氮氧化物抗肿瘤细胞生长及抗氧化损伤作用的比较。

The effect of bavachin and corylin, two active principles from Psoralea corylifolia L., on UMR106 cyclin E expression by Western blotting was examined. The result showed that the two flavonoid compounds had no significant effect on cyclin E expression after various exposure time.

对于中药补骨脂中分离的两个促成骨样细胞增殖的活性成分补骨脂二氢黄酮和补骨脂异黄酮，采用Western blotting的方法考察不同时间对UMR106细胞周期蛋白cyclin E的表达，结果它们对cyclinE的表达没有显著影响。

Gliosis is resulted in TLE. The synapse consists of the presynaptic and postsynaptic terminals, which in many synapses are surrounded by glial cell.

颞叶癫痫可导致神经系统胶质增生，突触后终端与胶质细胞之间形成突触，突触后终端的树突棘的形态学的变化引起突触结构的改变，与胶质细胞之间形成的突触为异位突触，引起海马内环路性质的变化，从而提高致痫性。

The transforming growth factor-β superfamily, a large group of highly conserved growth factors including TGF-βs, activins and BMPs, regulate a wide variety of cellular functions such as proliferation, differentiation, apoptosis and migration. Signals from these growth factors are transduced by a group of Smad proteins. To date, there are nine vertebrate Smads, including the receptor-activated Smads , Smadsl-3, 5 and 8, the common mediator Smad4 and Smad4β, and the inhibitory Smads, Smad6 and 7. Signaling is initiated when the ligand induces assembly of a heteromeric complex of type Ⅱ and type Ⅰ TGFβ receptors. Then R-Smads are directly phosphorylated by activated type I TGF-β receptors.

在多种SMADS中，SMAD5令我们产生兴趣，基于三个原因：1、Smad5基因敲除胚胎中发现卵黄囊的异位造血以及CFU-GM祖细胞数目增加，表明SMAD5可能是早期造血发育的负向调控基因。；2、应用反义核酸封闭Smad5可以逆转TGF-β对祖细胞增殖的抑制效应，表明它可能介导TGF-β信号转导，后者的异常，包括某些SMADS的功能异常，和白血病紧密相关；3、Smad5基因定位在人染色体5q21，此区域的缺失和急性髓系白血病和骨髓增生异常综合症相关，因此，Smad5被怀疑为白血病抑制基因。

There are four kind of isoforms of endothelin in human and other mammals named ET-1, ET-2, ET-3 and ET-β, which are slightly different in construction and pharmacological effect. In human beings, ET-1 is the dominative subtypes. ET-1 remains in blood at a low level about 5ng per liter on physical state. It is synthesized, stored, released and metabolized locally. The half-life of ET-1 is about 1 hour. ET-1 is the most potent vasoconstrictive factor till now, and it is more functional in vein than in artery. In vascular bed, there are two kind of ET receptors. Type A mainly located in smooth muscle cells, whereas type B in endothelial cells. The latter can stimulate intimal hyperplasia via a parasecretion way and activate some oncogenes such as c-fos and c-myc and then enhance their expression. These alterations result in constriction of blood vessels, thus the SMC steps into proliferate state from silent state.

人及哺乳动物体内有四种结构及药理学性质略有差异的异物体，分别为ET-1、ET-2、ET-3、ET-β，而在人主要是ET-1，在生理条件下，ET-1在血浆中含量较低，约为5ng〓，故ET-1不是一个循环激素，而是局部合成释放，局部起作用的活性物质，半衰期约1小时，ET-1是目前已知的最强的血管收缩剂，对静脉的作用比动脉强，在血管床，ET受体有A、B两型，A型主要分布在平滑肌细胞，B型主要分布在内皮细胞，它可以通过旁分泌途径刺激内膜增生，具有有丝分裂原效应，可以激活某些癌基因如C-fos、C-myc使其表达增强引起血管收缩，使静止期SMC进入增殖期，还可以通过信号传导途径，与bFGF、GTF-β、PDGF等生长因子协同作用，起共有丝分裂原作用。

CTAB was used to pyrolyse plant cell and reacted with the released cell nucleic acid to form nucleic acid-CTAB complex, the cell extract was then deproteined with chloroform-isoamylol, at last RNA was selectively precipitated by LiCl.

采用CTAB裂解植物材料，与细胞中的核酸形成核酸-CTAB复合体，然后用氯仿一异戊醇去除细胞裂解液中的蛋白，最后采用LiCl选择性沉淀其中的RNA。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。