发明名称 |
Process for producing three-dimensional tissue |
摘要 |
The invention provides a process for producing a three-dimensional tissue by cultivating eucaryotic cells by introducing the cells into a matrix and cultivating the cells within the matrix in a cell culture medium within a cell culture vessel under controlled dissolved oxygen conditions of the cell culture medium. The matrix contains a support containing an optical oxygen sensor, which is an oxygen-sensitive dye, which upon irradiation with an excitation wavelength changes its emission characteristics in dependence on the dissolved oxygen concentration in the surrounding medium, including a dye phosphorescing upon irradiation of an excitation wavelength, which phosphorescence is quenched by dissolved oxygen. |
申请公布号 |
US9222074(B2) |
申请公布日期 |
2015.12.29 |
申请号 |
US201113877575 |
申请日期 |
2011.10.04 |
申请人 |
Medizinische Hochschule Hannover;Biomimetics Technologies, Inc. |
发明人 |
Israelowitz Meir;Weyand Birgit;Vogt Peter;Reimers Kerstin;von Schroeder Herbert;Gille Christoph;Schmaelzlin Elmar |
分类号 |
C12Q3/00;G01N33/84;C12N5/0775;C12N5/00 |
主分类号 |
C12Q3/00 |
代理机构 |
Greer, Burns & Crain, Ltd. |
代理人 |
Greer, Burns & Crain, Ltd. |
主权项 |
1. Process for producing a three-dimensional tissue by introducing eukaryotic cells into a matrix and cultivating the cells within the matrix in a cell culture medium within a cell culture vessel while determining the dissolved oxygen concentration by measuring the emission from an oxygen-sensitive dye which is phosphorescing upon irradiation of an excitation wavelength, the process comprising integrating a support into the matrix, the support being particulate and permeable for oxygen and containing in its inner volume the oxygen-sensitive dye, directing an irradiation onto the matrix, the irradiation having an excitation wavelength suitable for exciting emission from the oxygen-sensitive dye, wherein the irradiation having the excitation wavelength is intensity-modulated to at least two frequencies, measuring the emission from the support containing the oxygen-sensitive dye, and detecting the time-resolved intensity of radiation emitted by the dye, wherein the phase-shift of the emission is determined from the emission for each of the at least two frequencies and determining the decay time of the phosphorescence of the oxygen-sensitive dye from the phase-shift, and wherein the irradiation and emission are selected and the matrix is configured such that the irradiation and emission at least partially cross a volume portion of the matrix to measure at a depth of at least 5-12 mm in the matrix. |
地址 |
Hannover DE |