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EP1171572A2 - Systemes modulaires de support cellulaire pour la croissance cellulaire en trois dimensions - Google Patents

Systemes modulaires de support cellulaire pour la croissance cellulaire en trois dimensions

Info

Publication number
EP1171572A2
EP1171572A2 EP00912550A EP00912550A EP1171572A2 EP 1171572 A2 EP1171572 A2 EP 1171572A2 EP 00912550 A EP00912550 A EP 00912550A EP 00912550 A EP00912550 A EP 00912550A EP 1171572 A2 EP1171572 A2 EP 1171572A2
Authority
EP
European Patent Office
Prior art keywords
cell
segments
cells
cell support
support system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP00912550A
Other languages
German (de)
English (en)
Inventor
Markus Oles
Dierk Landwehr
Beate Kossmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Creavis Gesellschaft fuer Technologie und Innovation mbH
Original Assignee
Creavis Gesellschaft fuer Technologie und Innovation mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Creavis Gesellschaft fuer Technologie und Innovation mbH filed Critical Creavis Gesellschaft fuer Technologie und Innovation mbH
Publication of EP1171572A2 publication Critical patent/EP1171572A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M25/00—Means for supporting, enclosing or fixing the microorganisms, e.g. immunocoatings
    • C12M25/10—Hollow fibers or tubes

Definitions

  • the present invention relates to artificial cell carrier systems for three-dimensional cell growth and their use
  • Growth is not only desirable for building up thicker layers, but also in order to maintain a functional cell structure such as an organ.
  • Cellular structures show interactions between the cells or other tissues in addition to a high cell density Interactions are necessary epigenetic factors for cell proliferation and differentiation
  • pore formation in these foams is important, since the cells settle in the pores or the nutrients are supplied via small pores in the material Dimensioning the pore n, however, can only be controlled inadequately. If the pores are too small, no cells can grow in there; if the pores are too large, undesired, two-dimensional cell growth takes place there.
  • the nutrient supply that is crucial for the growth of the cells or the removal of metabolic products also depends on a defined one Pore size distribution from The difficult to control pore size distribution leads to insufficiently controllable cell growth So far, no functional tissue or organ clusters have been cultivated with these concepts.For uses that require a higher degree of differentiation and thicker cell layers, such as connective tissue or artificial organs, these techniques have failed.A reason for this is the unavoidable supply of thick cell layers with nutrient media and Oxygen, as is ensured in vivo by vascularization of the tissue.
  • the cells can only be supplied with oxygen and nutrients via intercellular routes via a few cells or cell layers
  • the individual cell layers are not in contact with one another, so there are two-dimensional layers stacked on top of one another and no three-dimensional structure
  • JC Hager et al in J Natl Cancer Inst, 69, 6 (1982) describe a system of ordered bundles of hollow fibers for the growth of tumor cells. These fibers serve as a surface for cell adhesion and, via pores in the fibers, as a supply route for the provision of Nutrients and oxygen With them, three-dimensional cell growth can be achieved Orderly cell growth is not possible due to the difficult to control fiber spacing. Furthermore, the length, diameter and arrangement of the fibers determine the expansion and structure of the tissue to be grown
  • WO 90/02796 and US 5 510 254 describe a further possibility of building approximately three-dimensional cell structures.
  • mesh-like cell support structures optionally coated with growth-promoting substances, are used.
  • the tissues can be arranged to superstructures, with a cellular connection between the individual layers depending on their distance and thus can only be influenced inadequately.
  • Systems of this type are suitable for cell structures with a few layers; a complex, multi-layered three-dimensional cell structure cannot be grown with the aid of these tissues
  • the object of the present invention was therefore to provide a cell carrier with which three-dimensional cell tissue can be grown in vitro and in vivo
  • the present invention therefore relates to a cell carrier system made of porous material, the cell carrier system consisting of modularly shaped segments which are wholly or partly constructed from half-shells
  • the porosity of the modularly shaped segments can be specifically adapted to the cell type used.
  • the modularly shaped segments can have pores with an average diameter of 0.5 to 5 ⁇ m.
  • the distribution of the pores is advantageously chosen such that between one and three pores are available per grown cell for the supply of the cells, ie the segments advantageously have pores with an average spacing of 1 to 10 ⁇ m.
  • the segments of the cell carriers have a porous structure in whole or in part, with targeted cell growth preferably occurring only at the porous locations of the segments
  • the non-porous areas of the segments can be used for fastening purposes or the like due to the reduced cell growth here
  • the cell tissue grown on the cell carrier systems according to the invention is capable of proliferation in vitro and in vivo due to the excellent vascularization.
  • the modular shape of the segments enables cell carrier systems of almost any shape and complexity to be built up.
  • the optional connection between two or more segments enables the cultivation of practically any large, related cell and tissue cultures
  • Cell carrier systems according to the present invention enable the construction of three-dimensional cell tissues in which all cells can be supplied with nutrient solution and oxygen via a porous and thus micro-structured surface
  • the cells on the cell support systems according to the invention are supplied via a capillary system, which can be formed by combining the half-shells in each case with two modularly shaped systems.
  • the segments can be combined in such a way that a closed hollow body, that is to say a capillary system, is formed from the two half-shells.
  • the combination of two segments can be simplified by appropriate holding pins.
  • the capillaries preferably have a diameter of 20-70 ⁇ m Such a system offers the possibility of distributing released growth factors throughout the cell culture and thereby enabling differentiation of the tissue. With the present invention it is possible to ensure a continuous outflow and inflow of nutrients, metabolites, oxygen and growth factors to the cell tissues
  • the cell growth as well as the cell differentiation are significantly influenced by the surface topography of the cell carrier.
  • the exchange of nutrients and the distribution of the cells on the surface is determined by the type and topography of the microstructure, ie in the present case by the porosity of the surface Diffusion of the metabolic activity of the tissue is limited
  • the vascularization of the tissue also increases and thus reduces the necessary diffusion pathways
  • the cell support systems consist of shaped segments which enable a modular structure of a composite system
  • Suitable materials for the cell support systems according to the invention are, for example, polycarbonate, polymethyl methacrylate, polyurethane, polyamide, PVC, polyethylene, polypropylene, polystyrene or polysulfonate, and mixtures or copolymers thereof
  • the fixing of two segments to form a capillary system can be done by gluing, microwave or radio frequency techniques. Of course, this must be done in a way that the pores of the material are not or only slightly affected
  • the cell support systems can be they individual segments or preformed capillary systems, can be connected to each other. This can be achieved by using spacers, which are advantageously already fixed to them during the manufacture of the segments.
  • the spacers also ensure a constant distance between them individual segment layers, so that cells can grow here too
  • Modularly shaped segments preferably have spacers with a height of 20 to 200 ⁇ m. If the spacers are hollow and suitable for liquid transport, the nutrient solution can thus be guided through the entire system
  • the modular design of the segments causes a mini-cry of the natural environment of the cells, so that proliferation, differentiation or the execution of the physiological functions of the cells takes place as long as the cells can be supplied with nutrient solution by the porous material.
  • This supply usually takes place over 2 to 20 cell layers, the number of supplied cell layers strongly dependent on the metabolism of the cells Liver and kidney cells must be grown on cell support systems with small distances (20-40 ⁇ m), since they also require a high blood supply in the body
  • the distance between the cell support systems fibroblasts and cartilage cells can be very large, up to 200 ⁇ m
  • the individual segments can be produced using micro system technology.
  • a suitable process is, for example, the LIGA process, a structuring process that is based on basic processes of X-ray lithography, electroplating and molding.
  • the mold inserts produced by LIGA technology can then be used in injection molding, reactive resin molding or Any number of copies can be made from various plastics with high level of detail and at relatively low cost using the stamping process.
  • the pores can be introduced into the material using suitable spinous processes on the mold inserts
  • Fig. 2 shows an example of the structure of a cell carrier according to the invention from two segments.
  • a segment consists of a central supply pipe, from which branches branch off vertically, at periodically repeating intervals.These branches form a capillary system.
  • the surface of the segments is provided with small pores which depend on the the cell type used have a diameter of 0.5-5 ⁇ m.
  • the pores have an average spacing of 1 to 10 ⁇ m, the distance between the branches (L1) can be between 20 and 200 ⁇ m, adapted to the cell type
  • the nutrient medium is actively or passively pumped through a corresponding gradient through the central supply pipe.
  • the distribution of the nutrient medium and the respiratory gases to Tissue is ensured by diffusion.
  • the nutrient cycle is designed so that the medium can run off again via a drain and can be returned to the cycle or collected for further processing / disposal
  • the individual segments have a modular structure so that they can be fitted together to form larger, three-dimensional objects.This creates an artificial capillary network that enables the cells to be vascularized almost naturally.
  • the segments suitably have appropriate spacers as plug-in devices for a simple and precisely fitting connection between two Allow segments
  • spacers In order to set the desired distances between the segments according to the invention, these are provided with spacers.
  • the spacers expediently serve as a plug-in device for fixing two segments (AH in FIG. 3).
  • the inflow and outflow are also designed so that the individual segments are in a liquid-carrying manner with one another Can be connected Hollow spacers can be used to connect the inflows and outflows of segments
  • the segments can also be stacked offset from one another
  • the desired cell types can be applied to the individual segments after the cell carrier has been built up.
  • the system is placed in a roller bottle with a cell suspension of high density.In this bottle, the system remains at an average number of revolutions of the roller bottle until enough cells are on the Having fixed the surface This is typically completed after 3 to 8 hours. Then the system is transferred, preferably under sterile conditions, into a Petri dish and fresh medium is pumped through the cell supports through the supply connections of the segments. After a few days, the segment surfaces and thus a multilayer cell tissue between the channel walls
  • the cell tissue can also be built up step by step.
  • a level of the cell carrier according to the invention is incubated with cells. After a cell layer has grown on this, the lowest level, the system is gradually moved around a cell carrier layer extended to allow a cell layer to grow here as well
  • the successive procedure has the advantage that different differentiation of a cell type can also be enforced by different spacing of the segments or the support layers. The different differentiation of a cell type is important e.g. in skin cells in practice have kept segment spacings of 3-6 cell layers
  • the cell carriers according to the invention enable the cells to be well supplied with nutrients. This can be achieved by branching the segments.
  • FIG. 4 a to e shows an exemplary embodiment of such a system based on a honeycomb structure. Food medium is pumped into this system through an inlet the medium run off and returned to the circuit or collected for further processing / disposal The surface of the segments is provided with small pores with a large size and distribution as already described. Combining the segments also creates an artificial capillary network in this embodiment variant
  • the diameter of the individual honeycombs (“key width”) depends on the cell type used and can be between 70 and 180 ⁇ m.
  • the next honeycomb-shaped cell carrier can be stacked over 90 degrees (FIG. 4 c) and stacked over the previous cell carrier become
  • a three-dimensional cell culture can also be built up with honeycomb-shaped segments.
  • appropriately designed plug connections between the honeycombs enable cell growth across layers (FIG. 4 e)
  • the honeycomb-shaped cell carriers are constructed from two half shells or a half shell and a membrane which are firmly connected to one another
  • FIG. 5 shows schematically the structure of such a cell carrier in a pyramidal design in the top (FIG. 5 a) and side view (FIGS. 5 b and c)
  • Segments are periodically arranged in parallel rows (Fig. 5 c and d) between The rows remain at a distance, preferably from half the base area of a pyramid.
  • the individual rows of segments can in turn be connected to one another by spacers which may be suitable for liquid transport.
  • Nutrient medium is pumped through the elements via an inlet. The medium can run off via a drain, be returned to the circuit or be collected for further processing / disposal
  • the surfaces of the pyramids are provided with small pores with size and distribution as described.
  • the pyramids themselves are hollow, open at the base surface and thus also form a half-shell.
  • the side view in FIG. 5 c shows the connection of two segments a closed cell support system
  • a cell culture with pyramid-shaped cell support segments according to the invention can be constructed as follows: In a suitable cell culture system, some pyramid-shaped segments are applied to the base as a basic element. Above these structures, further segments can now be positioned. The combination of segments creates the cell supports (see side view Fig. 5 c ) The segments can be nested so that there is a distance between the surfaces of the pyramids in which the cells can grow
  • the advantage of this structure is that the geometrical dimensions of the elements are independent of the selected cell type. Only the layer spacing and the pore diameter of the elements must be adapted to the cell type used in order to achieve the highest possible cell density or a small dead volume within the pyramids, ie the supply elements. a small height of the individual pyramid elements is recommended in comparison to their base area.
  • the cell supports shown in FIG. 5 d have the following dimensions
  • Width of the segments a3 150 - 300 ⁇ m Length of the segments a5 integer multiples of a3 Distance of the cell carriers a4 50 - 300 ⁇ m
  • these can also be formed by combining a half-shell of a modularly shaped segment with a semi-permeable membrane while building a capillary system.A permeable membrane is stretched on the back of a segment.
  • the protruding membrane parts can be removed using suitable etching processes Technology has the advantage that two segments do not have to be assembled precisely.
  • Semipermeable membranes such as Gorotex, Simpatex or ceramic membranes are suitable for this purpose. Plasma etching has proven to be a preferred etching process.
  • the protruding membrane portions are removed in a plasma reactor with plasma gases such as F 2 , Cl 2 , CF 3 7F, CC1 3 + / C1 and O 2 etches
  • plasma gases such as F 2 , Cl 2 , CF 3 7F, CC1 3 + / C1 and O 2 etches
  • This embodiment of the present invention also ultimately creates closed cavities or capillaries.
  • the pore size and distribution of the membranes correspond to those of the segments with an average distance of 1 to 10 ⁇ m and an average diameter of 0.5 to 5 ⁇ m
  • Another object of the present invention is the use of the three-dimensional cell support systems for bioreactors and for the cultivation of eukaryotic or organic stem cells
  • Important stem cells are heptocytes, kidney cells, endothelial cells, epithelial cells or myocytes
  • human proteins By using cell carriers according to the invention which are optimized for human cell types, human proteins can thus also be synthesized. This means that the structure and in particular the folding of the synthetic proteins corresponds to the natural proteins of the human body
  • the proteins or other substances produced by the cells can be continuously removed via the nutrient supply cycle. In the case of non-adherent systems, this is only possible by filtration or by centrifuging the suspensions. For example, the development of cell cultures as an implant up to artificial hybrid organs
  • cell carrier systems according to the invention has the advantage that the hepatocytes are not present in a suspension but can grow organotypically. This ensures that the heptatocytes achieve a degree of differentiation which is also present in vitro
  • the hepatocytes can be adequately supplied.
  • the individual segments are switched in such a way that there is only one inlet and one outlet Protection from infection is closed by an external encapsulation.
  • the blood circulation of a patient can then be closed via the inflow and outflow in the outside.
  • the cells then take over the function of the liver.
  • other artificial organs such as a Kidney to be built up
  • the replication of artificial tissue and tissue replacement on cell supports according to the invention offers decisive advantages in the toxicity test. Encapsulation is not necessary for the replication of the skin.In imitation of the anatomical model, the blood supply to the dermis must decrease more and more when artificial skin is being grown Increasing distances between the segments in the cell culture can be achieved. Because the artificial vascularization due to this construction lies in precisely defined cell layers, this can also be used for penetration tests. For such tests, the elements in the cell culture must be supplied in layers, so that only nutrient medium can be removed for analysis in the desired cell layer.
  • the use of cell carriers according to the invention has advantages in particular in the creation of disease models.
  • the cells that carry the characteristic features of the disease at the cellular level are brought into a cell culture and are kept in a 3D culture by segments. This technique keeps the cells longer in the "pathological" physiological state and does not redifferentiate again so quickly.
  • the use of such models is primarily in the pharmaceutical industry, which can test new drugs on such models. Furthermore, such models can make a decisive contribution to understanding some diseases

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  • Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Chemical & Material Sciences (AREA)
  • Zoology (AREA)
  • Biomedical Technology (AREA)
  • Sustainable Development (AREA)
  • Microbiology (AREA)
  • Biotechnology (AREA)
  • Biochemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Genetics & Genomics (AREA)
  • Immunology (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Immobilizing And Processing Of Enzymes And Microorganisms (AREA)

Abstract

Systèmes de support cellulaire constitués par des demi-coques en matière poreuse. Par combinaison entre elles ou avec une membrane semi-perméable, lesdites demi-coques peuvent former un système capillaire. Lesdits systèmes peuvent être utilisés pour la culture de cellules souches eucaryotes ou organiques ou pour des bioréacteurs.
EP00912550A 1999-04-28 2000-03-04 Systemes modulaires de support cellulaire pour la croissance cellulaire en trois dimensions Withdrawn EP1171572A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19919242 1999-04-28
DE1999119242 DE19919242A1 (de) 1999-04-28 1999-04-28 Modulare Zellträgersysteme für dreidimensionales Zellwachstum
PCT/EP2000/001913 WO2000066712A2 (fr) 1999-04-28 2000-03-04 Systemes modulaires de support cellulaire pour la croissance cellulaire en trois dimensions

Publications (1)

Publication Number Publication Date
EP1171572A2 true EP1171572A2 (fr) 2002-01-16

Family

ID=7906114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00912550A Withdrawn EP1171572A2 (fr) 1999-04-28 2000-03-04 Systemes modulaires de support cellulaire pour la croissance cellulaire en trois dimensions

Country Status (6)

Country Link
EP (1) EP1171572A2 (fr)
JP (1) JP2002542817A (fr)
CA (1) CA2372219A1 (fr)
DE (1) DE19919242A1 (fr)
WO (1) WO2000066712A2 (fr)
ZA (1) ZA200109700B (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8846393B2 (en) 2005-11-29 2014-09-30 Gamida-Cell Ltd. Methods of improving stem cell homing and engraftment
US20080206735A1 (en) * 2007-02-28 2008-08-28 Cinvention Ag High surface cultivation system with surface increasing substrate
DE102008050424B4 (de) 2008-10-08 2010-11-25 Universität Leipzig Verfahren und Vorrichtung zur homogenen Verteilung einer zellulären Suspension in porösem Trägermaterial für die Herstellung von vitalem biologischem Ersatzgewebe
WO2011073261A2 (fr) * 2009-12-16 2011-06-23 Vivabiocell Spa Dispositif de culture en continu
JP6348848B2 (ja) 2012-02-13 2018-06-27 ガミダ セル リミテッド 間葉系幹細胞の増殖
US9175266B2 (en) 2012-07-23 2015-11-03 Gamida Cell Ltd. Enhancement of natural killer (NK) cell proliferation and activity
US9567569B2 (en) 2012-07-23 2017-02-14 Gamida Cell Ltd. Methods of culturing and expanding mesenchymal stem cells
US20190136218A1 (en) 2016-05-05 2019-05-09 Danisco Us Inc Protease variants and uses thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5510254A (en) * 1986-04-18 1996-04-23 Advanced Tissue Sciences, Inc. Three dimensional cell and tissue culture system
US5605835A (en) * 1988-05-23 1997-02-25 Regents Of The University Of Minnesota Bioreactor device with application as a bioartificial liver
DE4206585C2 (de) * 1992-03-03 1994-11-24 Augustinus Dr Med Bader Vorrichtung zur Massenkultur von Zellen
JP4112616B2 (ja) * 1995-10-06 2008-07-02 シード・キャピタル・インベストメンツ−２（エスシーアイ−２）・ビー・ブイ 細胞培養、特に肝細胞の培養に使用するための固相支持体、前記固相支持体を含む生物的リアクター、およびバイオ人工肝臓システムにおけるその使用

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0066712A3 *

Also Published As

Publication number Publication date
JP2002542817A (ja) 2002-12-17
DE19919242A1 (de) 2000-11-02
WO2000066712A2 (fr) 2000-11-09
WO2000066712A3 (fr) 2001-04-19
ZA200109700B (en) 2002-06-26
CA2372219A1 (fr) 2000-11-09

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