Abstract:
Die Erfindung betrifft ein bioaktives Beschichtungsmaterial zur Beschichtung von Kunststoffmaterialien für Zellkulturen, umfassend ein Polymerkonjugat aus jeweils einem polymeren Ankermolekül mit oberflächenaktiven Ankergruppen einerseits und aus jeweils einem oder mehreren biologisch aktiven Molekülen andererseits. Das Ankermolekül ist dabei ein amphiphiles Molekül mit einem hydrophoben Teil aus Styren-, Methacrylsäure-, Isobuten-, Acrylsäure-, Acrylsäureester- oder Methacrylsäureestereinheiten und einem hydrophilen Teil aus Carboxyl-, Amino-, Epoxid-, Thiol-, Alkin- oder Azidgruppen enthaltenden Einheiten. Durch die Auswahl von zellinstruktiven Beschichtungsmaterialien lassen sich Zellschicksalsentscheidungen, insbesondere die Zelladhäsion auf nahezu beliebigen Zellkultur-Einwegartikeln individuell durch den Anwender effektiv steuern. Mit diesem Konzept werden insgesamt wertvolle neue Optionen für High-Throughput-Diagnostik, Stammzell-Biotechnologie und Regenerative Therapien eröffnet.
Abstract:
The present invention provides the use of selected thermogelling polymers for the purpose of growing tumor spheroids. The invention provides a thermogelling platform comprising a synthetic polymer which, when seeded with cancer cells, induces the cells to grow into a natural spheroidal pattern forming a tumor spheroid. After accomplishing this in about 3-10 days, the gel washes away, leaving behind the spheroids.
Abstract:
Disclosed are compositions and methods of making stable electrically active adult neurons from adult neural tissue. The disclosed compositions can be used with microelectrode arrays in vitro to represent in vivo neural function for drug discovery and for studying neuronal degenerative diseases, neuronal development, and neuronal regeneration.
Abstract:
The present invention describes a method to immobilize high density of cell-specific ligands on polymeric surface for cell engineering applications. This method combines a surface-grafting polymerization procedure to yield high density of functional groups, and a chemical conjugation step to link cell-specific ligands to the surface functional groups. This surface functionalization scheme can be applied to polymeric materials in various forms, such as polymer membrane, film, fiber, hollow fiber, foam, etc. Tissue-engineering scaffolds can be functionalized with cell specific ligand in the same manner.
Abstract:
A method of culturing autogenous cells as well as a method of treating a mammalian patient is described. The cells are cultured on a substrate material having a surface treated with a fatty acid ester so as to have a strong hydrophobic surface and autogenous plasma obtained from a blood sample of the patient is used as a growth medium in order to culture the cells. The substrate material is also used as a transfer dressing for transferring the cultured cells to the patient and as a wound cover dressing. The invention also describes a kit as well as a system for culturing autogenous cells using the culture method.
Abstract:
Die Erfindung betrifft ein physikalisches selbstorganisierendes Hydrogelsystem für biotechnologische Anwendungen aus einem nicht-kovalenten Netzwerk auf der Grundlage einer Protein-Ligand-Wechselwirkung, umfassend ein tetrameres Protein als Protein sowie Biotin oder eines seiner Derivate als Ligand, wobei Biotin oder eines seiner Derivate kovalent jeweils an ein Ende einer Polymerkette eines linearen oder mehrarmigen synthetischen Polymers oder eines Einzel- oder Doppelstrang-Oligonukleotids konjugiert ist und wobei der Feststoffgehalt bezogen auf das gesamte Hydrogel mindestens 3 % beträgt und die Konjugate durch das tetramere Protein vernetzt sind. Im Hydrogelsystem liegt dabei ein Mischungsverhältnis als molares Äquivalentverhältnis zwischen dem Protein und der Anzahl der terminalen biotinylierten Enden der Polymerketten im Biotin-Polymer-Konjugat von 1:2 bis 1:8 vor. Die Hydrogelbildung erfolgt dabei mit kontrollierter Kinetik auf der Grundlage einer Protein-Ligand-Wechselwirkung.
Abstract:
Provided are pharmaceutical compositions that include a pharmaceutically acceptable carrier and isolated post-natal cardiac progenitor cells (CPCs) and/or progeny cells thereof that are SSEA3-positive and c-kit-negative. Also provided are methods for preparing cells capable of repairing damaged myocardium, methods for isolating populations of SSEA3- positive/c-kit-negative CPCs from cardiac tissue samples, methods for preparing an isolated cell population enriched in post-natal SSEA3-positive/c-kit-negative CPCs, therapeutic methods for using the presently disclosed cells and populations of cells to treat subjects in need thereof, and cell cultures that contain the presently disclosed cells and populations of cells.
Abstract:
A process for modifying a polymeric surface, the process comprising; contacting the polymeric surface with a solution comprising at least one ethylenically unsaturated monomer; and exposing the polymeric surface in contact with the solution to ultra-violet light to provide a graft-polymer of the monomer coated on the polymeric surface.
Abstract:
A method for forming neuromuscular junctions includes forming functional neuromuscular junctions between motoneurons and muscle cells by co-culturing one or more human motoneurons and one or more human muscle cells in a substantially serum-free medium. A synthetic mammalian neuromuscular junction includes a human motoneuron functionally linked to a human muscle cell in a substantially serum-free medium. An artificial substrate may be used to support the one or more neuromuscular junctions.
Abstract:
There is described a method of promoting the attachment, survival and/or proliferation of a stem cell in culture, the method comprising culturing a stem cell on a positively-charged support surface. There are also provided a cell composition prepared according to the method of the invention.