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    • 67. 发明公开
    • Chimeric immunocompromised mammals and their use
    • SchimäreimmunkompromittierendeSäugetiereund ihre Verwendung。
    • EP0322240A2
    • 1989-06-28
    • EP88312222.8
    • 1988-12-22
    • THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
    • McCune,Joseph,McCrary
    • C12N15/00C12P21/00
    • G01N33/56977A01K67/0271C07K16/00C07K16/18C12N2517/00G01N33/56972G01N33/56988
    • Chimeric hosts are provided by introducing into an immunocompromised mammalian host xenogeneic, usually human, tissue under conditions where the xenogeneic tissue may both grow and interact, in such a way that undifferentiated ("stem") cells may be observed to differentiate and to proliferate. For example, tissues from hematopoietic organs are employed where tissue from different organs may be used which allow for differentiation and proliferation of the xenogeneic hematopoietic stem cells. Into SCID mice may be introduced fetal tissue, fetal liver tissue providing stem cells, thymus tissue, where the thymus grows into a competent thymus organ, and lymph node tissue, where the lymph node tissue grows into a competent lymph node, and the stem cells are processed to produce functional human B- and T-cells.
    • 嵌合宿主通过在异种组织可能生长和相互作用的条件下引入免疫受损的哺乳动物宿主异种,通常为人类组织来提供,使得可观察到未分化(“茎”)细胞分化和增殖。 例如,使用来自造血器官的组织,其中可以使用来自不同器官的组织,其允许异种造血干细胞的分化和增殖。 可以将SCID小鼠引入胎儿组织,提供干细胞的胎儿肝组织,胸腺组织,其中胸腺生长成有效的胸腺器官和淋巴结组织,其中淋巴结组织生长成感受态淋巴结,并且干细胞 被处理以产生功能性人B细胞和T细胞。
    • 70. 发明申请
    • METHODS FOR ASSAYING GENE IMPRINTING AND METHYLATED CpG ISLANDS
    • 用于测定基因印迹和甲基化CpG岛的方法
    • WO0190313A9
    • 2003-03-06
    • PCT/US0116253
    • 2001-05-22
    • UNIV JOHNS HOPKINSFEINBERG ANDREWSTRICHMAN-ALMASHANU LIORAJIANG SHAN
    • FEINBERG ANDREWSTRICHMAN-ALMASHANU LIORAJIANG SHAN
    • A01K67/027A61P35/00C12N5/074C12N5/10C12N15/09C12Q1/02C12Q1/68C12N5/06C12N15/11G01N33/50
    • C12N5/0611C12N2501/115C12N2501/125C12N2501/235C12N2501/385C12N2502/13C12N2503/00C12N2503/02C12N2510/00C12N2517/00C12Q1/6827C12Q1/6886C12Q2600/118C12Q2600/136C12Q2600/154
    • Genomic imprinting is a parent of origin-dependent gene silencing that involves marking of alleles in the germline and differential expression in somatic cells of the offspring. Imprinted genes and abnormal imprinting have been implicated in development, human disease, and embryonic stem cell transplantation. We have established a model system for genomic imprinting using pluripotent 8.5 d.p.c. mouse embryonic germ (EG) cell lines derived from an interspecific cross. We find that allele-specific imprinted gene expression has been lost in these cells. However, partial restoration of allele-specific silencing can occur for some imprinted genes after in vitro differentiation of EG cells into somatic cell lineages, indicating the presence of a gametic memory that is separable from allele-specific gene silencing. We have also generated a library containing most methylated CpG islands. A subset of these clones was analyzed and revealed a subdivision of methylated CpG islands into 4 distinct subtypes: CpG islands belonging to high copy number repeat families; unique CpG islands methylated in all tissues; unique methylated CpG islands that are unmethylated in the paternal germline; and unique CpG islands methylated in tumors. This approach identifies a methylome of methylated CpG islands throughout the genome.
    • 基因印记是起源依赖基因沉默的亲本,其涉及在种系中标记等位基因和在后代的体细胞中的差异表达。 印迹基因和异常印记涉及发育,人类疾病和胚胎干细胞移植。 我们已经建立了使用多能8.5 d.p.c的基因组印迹模型系统。 来自种间交叉的小鼠胚胎胚芽(EG)细胞系。 我们发现在这些细胞中已经丢失了等位基因特异性印记的基因表达。 然而,在将EG细胞体外分化成体细胞谱系后,一些印迹基因可能发生等位基因特异性沉默的部分恢复,表明存在可与等位基因特异性基因沉默分离的配子记忆。 我们还生成了一个含有大多数甲基化CpG岛的文库。 分析了这些克隆的一个子集,并揭示了甲基化CpG岛分为4个不同的亚型:属于高拷贝数重复家族的CpG岛; 所有组织中独特的CpG岛甲基化; 在父系种系中未甲基化的独特的甲基化CpG岛; 和独特的CpG岛在肿瘤中甲基化。 该方法鉴定了整个基因组中甲基化CpG岛的甲基化。