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    • 8. 发明授权
    • VASCULARIZED PERFUSED MICROTISSUE/MICRO-ORGAN ARRAYS
    • 密克罗尼西亚的VASKULARISIERTE PERFUNDIERTE ANORDNUNGENFÜRMIKROGEWEBE
    • EP1064353B1
    • 2002-11-06
    • EP99913967.8
    • 1999-03-18
    • MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    • GRIFFITH, Linda, G.TANNENBAUM, Steven, R.POWERS, Mark, J.DOMANSKY, KarelTHOMPSON, Charles, D.
    • C12M3/04C12M1/34
    • G01N33/5038B01J19/0046B01J2219/00286B01J2219/00308B01J2219/00313B01J2219/00317B01J2219/00319B01J2219/00351B01J2219/00376B01J2219/00416B01J2219/00585B01J2219/00659B01J2219/0072B33Y10/00B33Y80/00B82Y30/00C12M21/08C12M23/12C12M41/46C40B60/14G01N33/5008G01N33/502G01N33/5058G01N33/5064G01N33/5073
    • Systems including (1) a micromatrix and perfusion assembly suitable for seeding and attachment of cells within the matrix and for morphogenesis of seeded cells into complex, hierarchical tissue or organ structures, wherein the matrix includes channels or vessels through which culture medium, oxygen, or other nutrient or body fluids can be perfused while controlling gradients of nutrients and exogenous metabolites throughout the perfusion path independently of perfusion rate, and (2) sensor means for detecting changes in either cells within the matrix or in materials exposed to the cells, have been developed. Methods for making the micromatrices include micromachining, micromolding, embossing, laser drilling, and electro deposition machining. Cells can be of one or more types, either differentiated or undifferentiated. In a preferred embodiment, the matrix is seeded with a mixture of cells including endothelial cells which will line the channels to form 'blood vessels', and at least one type of parenchymal cells, such as hepatocytes, pancreatic cells, or other organ cells. The system can be used to screen materials for an effect on the cells, for an effect of the cells on the materials (for example, in a manner equivalent to tissue metabolism of a drug), or to test a material on a biological that must first infect cells or tissues, such as viruses. The apparatus also can be used to provide a physiological environment for expansion of stem cells, or for enabling gene therapy in vitro.
    • 系统包括(1)微阵列和灌注组件,其适用于将基质内的细胞接种和附着,并将种子细胞的形态发生转化为复杂的分层组织或器官结构,其中所述基质包括通道或血管,培养基,氧气或 可以灌注其他营养液或体液,同时控制整个灌注路径中的营养物质和外源性代谢物的梯度,与灌注速率无关,和(2)用于检测基质内或细胞暴露的材料中任一细胞的变化的传感器装置, 发达。 制造微阵列的方法包括微加工,微胶印,压花,激光钻孔和电沉积加工。 细胞可以是一种或多种,​​分化或未分化。 在一个优选的实施方案中,用包含内皮细胞的细胞混合物接种基质,所述内皮细胞将通道形成“血管”,以及至少一种类型的实质细胞,例如肝细胞,胰腺细胞或其它器官细胞。 该系统可用于筛选对细胞的影响的材料,用于细胞对材料的影响(例如,以等同于药物的组织代谢的方式),或用于测试必需的生物学上的材料 首先感染细胞或组织,如病毒。 该装置还可用于提供用于扩大干细胞的生理环境,或用于在体外实现基因治疗。
    • 10. 发明公开
    • COMB COPOLYMERS FOR REGULATING CELL-SURFACE INTERACTIONS
    • KAMM-POLYMERE ZUR REGELUNG DERZELLOBERFLÄCHENWECHSELWIRKUNG
    • EP1071467A1
    • 2001-01-31
    • EP99917442.8
    • 1999-04-13
    • MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    • MAYES, Anne, M.GRIFFITH, Linda, G.IRVINE, Darrell J.BANERJEE, PallabJOHNSON, Terry D.
    • A61K47/48
    • A61K47/48A61K47/50A61K47/56A61K47/641C08G81/00C08G81/024C08J5/24
    • Synthetic comb copolymers which elicit controlled cellular response, methods of applying these polymers to various surfaces, and methods of using the polymers for modifying biomaterial surfaces, in tissue engineering applications and as drug delivery devices are provided. The comb copolymers are comprised of hydrophobic polymer backbones and hydrophilic, non-cell binding side chains which can be end-capped with cell-signaling ligands that guide cellular response. By mixing non-cell binding combs with ligand-bearing combs, the surface concentration and spatial distribution of one or more types of ligands, including adhesion peptides and growth factors, can be tuned on a surface to achieve desired cellular response. In one embodiment, the combs are used as stabilizing agents for dispersion polymerization of latexes. The comb-stabilized latexes can be applied to substrates by standard coating operations to create a bioregulating surface, or used as drug delivery agents. In another embodiment, the combs can be blended in small quantities to a hydrophobic matrix polymer and processed to affect the surface segregation of the comb.
    • 提供引起受控细胞反应的合成梳状共聚物,将这些聚合物应用于各种表面的方法,以及使用该聚合物改性生物材料表面的方法,在组织工程应用中以及作为药物递送装置。 梳状共聚物由疏水性聚合物主链和亲水的非细胞结合侧链组成,其可以用引导细胞反应的细胞信号传导配体封端。 通过将非细胞结合梳与含配体的梳子混合,可以在表面上调节一种或多种类型的配体(包括粘附肽和生长因子)的表面浓度和空间分布,以实现所需的细胞反应。 在一个实施方案中,梳子用作胶乳分散聚合的稳定剂。 梳状稳定的胶乳可以通过标准涂布操作施加到基底上以产生生物调节表面,或用作药物递送剂。 在另一个实施方案中,梳子可以少量混合到疏水性基质聚合物中并进行加工以影响梳子的表面分离。 梳状共聚物在一个实施方案中通过提供包括反应性基团的可生物降解的聚酯主链,并使主链中的反应性基团与低分子量亲水聚合物上的反应性链端端反应形成。 在另一个实施方案中,通过自由基合成疏水性单体和亲水性大分子单体形成不可生物降解的梳状共聚物。 在所有上述实施方案中,一部分亲水性聚合物侧链可共价偶联至细胞信号传导配体如粘附肽或生长因子以控制细胞反应。