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The calculated results show that the binding affinity between Myricetin and MMP-7 is higher than that between Pyrogallic acid and MMP-7 when they bind to MMP-7, thus Myricetin is more potent on MMP-7 than Pyrogallic acid. This is in agreement with the inhibitory activity order from experiments.

研究结果表明,在与MMP-7结合时,杨梅黄酮比焦性没食子酸具有更高的亲合性,因此杨梅黄酮对MMP-7有更好的效能,这与实验测得的活性顺序相符。

Horbol myristate acetate , a potent activator of protein kinase C , not only could increase the release of 〓-Ⅱ in the two kinds of VSMC, but also had an additive effect with TNF-α.

KC激活剂PMA不仅可增加上述两种细胞〓-Ⅱ的释放,且与TNF-α有相加作用。

In High Necromantic practice, the cadaver is simply a consecrated catalyst - an empty chalice, if you will, that we will attempt to fill with a potent spirit.

高necromantic做法,简直是死尸着催化剂空洞毒酒,如果你将我们将试图填补了烈性精神。

Because relationships assist us in accomplishing this purpose, I see their endings not a tragic but, although needled with pain, as potent opportunity.

因为有人际关系在这个过程中协助了我们,我知道结局未必就是悲剧,尽管掺杂着痛苦,但也隐藏着机遇。

Two of the recalled products contain aristolochic acid which is a potent carcinogen and nephrotoxin.

回收的产品中有两项为含有马兜铃酸的产品。

Ochratoxin A is a potent nephrotoxin and a possible human carcinogen, which is harmful for human being and plants and animals.

赭曲霉毒素A是一种具有强烈致癌性的毒素,对人类和动植物的危害也最大,首次检测出存在于葡萄与葡萄酒中的OTA。

Vascular endothelial growth factor (VEGF or VEGF-A) is a hypoxia induced angiogenic growth factor that is potent in neurotrophy, neuroprotection, anti-apoptosis and cell proliferation.

VEGF是一种由缺氧诱导的血管生长相关肽,在脑内有比较丰富的表达。VEGF具有神经营养、神经保护、抗凋亡、细胞增殖、提高毛细血管渗透压等广泛的生物学作用。

Glioma is still one of refractory disease in the neurosurgical field; the development of new primary and adjuvant treatment is vital. Recently, the gene therapy of glioma is developed rapidly and there are many methods about the gene therapy that include: suicide gene therapy, immunologic gene therapy, drug resistangce gene therapy, angiostatin gene therapy and so on. The sucide gene therapy is the most potential approach of antitumer, these nonmammalian genes encode enzyme that convert nontoxic prodrugs into highly toxic metablites. Cells transfected with suicide genes are targeted for specific negative selection, witch can be induced by administrtion of the corresponding produg. Among the enzyme/produg combinations, two of the best characterized system are herpes simplex virus thymidine kinase /ganciclovir and Escherichia coli cytosine deaminase /5-flourocytosine (5-FC). The formor can convert the antiviral nucleoside analogs acyclovir , ganciclovir to their nucleoside monophosphate derivatives, the monophosphate forms are subsequently phosphorylated by endogenus cellular kinases to triphosphates, these molecules are potent inhibitors of DNA synthesis.

近年来脑胶质瘤的基因治疗发展迅速,应运而生的方法有自杀基因、免疫基因、多药耐药基因以及抗血管生成基因等,其中自杀基因被认为是最有前景的基因治疗方法,它又称病毒介导的酶/药物前体疗法,是利用转基因技术将哺乳动物细胞中所不含有的自杀基因转入到哺乳动物肿瘤细胞中,该基因表达的产物可将无毒的药物前体转化为毒性药物,从而选择性杀伤该肿瘤细胞,常用的自杀基因有单纯疱疹病毒-胸苷激酶基因和大肠杆菌胞嘧啶脱氨酶基因,前者催化无毒性抗病毒核苷类似物如丙氧鸟苷、无环鸟苷等成为单磷酸核苷衍生物,然后在内源性细胞激酶作用下转化为具有明显毒性的三磷酸核苷,作为DNA合成链的终止剂和DNA合成酶的抑制剂,干扰细胞DNA的合成;后者编码的胞嘧啶脱氨酶可催化5-氟胞嘧啶(5-FC)脱氨成为5-氟尿嘧啶(5-FU),然后代谢为有毒性的5-氟尿嘧啶-5′三磷酸(5-FUTP)和5-氟-2′脱氧尿嘧啶-5′磷酸(5-FdUTP),5-FUTP通过与UTP竞争性结合而抑制mRNA和tRNA的合成,5-FdUTP则作用于胸苷合成酶,导致TMP衰竭而阻止DNA的合成,最终诱导肿瘤细胞凋亡。

Based on these results and inferred to related reports from other labratories, it was possible to make some analyses and conclusions or inferrences:(1) CD〓AK with tumoricidal activity were induced and expanded in number througth costimulation of PBMC with anti-CD〓 McAb . and r IL-2 ;(2) CD〓AK induced and expanded in such manner did exibit more potent proliferation·ability and cytotoxicity which maintained for lonser time than those of LAK cells, thus CD〓AK was a new variety of antitumor effector cells worth to be explored;(3) CD〓AK could mediate MHC nonrestricted cytotoxicity and kill tumor target cells through inducing necrosis and apoptosis;(4) Normal mature lymphocytes of PBMC could be induced to proliferate and /or to die from apoptosis when they were costimulated by anti-CD〓McAb and rIL-2. Both proliferation and apoptosis were existing in the same cultivation system sugsesting that the presence of rIL- 2 might provide some accessary signals for apoptosis.

以这些结果为基础并参考其它有关文献可能做出如下分析与结论或推论:(1)用抗CD〓单抗和rIL-2共刺激外周血单个核细胞能诱生扩增出具有杀瘤活性的CD〓AK细胞,(2)与LAK相比,用这种方法诱生扩增的CD〓AK增殖能力强、细胞毒活性强而且维持时间长;CD〓AK是一类值得开发的抗瘤效应细胞;(3)CD〓AK能够介导MHC非限制性细胞毒活性,可以通过诱导靶细胞坏死和/或凋亡杀伤肿瘤细胞;(4)正常外周血单个核细胞中的成熟淋巴细胞在受到抗CD〓单抗和rIL-2共同刺激后既可诱导增殖也可诱导凋亡,两者并存于同一体系,推测rIL-2的存在可能为细胞凋亡提供一些辅助信号。

The dental-tissue-derived stem cells are isolated from specialized tissue with potent capacities to differentiate into odontogenic cells.

从牙齿组织特定部位分离的牙齿组织来源干细胞可以分化为牙源性细胞。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。