EP0801676A2 - New artificial tissue, method for the production and the use thereof - Google Patents

New artificial tissue, method for the production and the use thereof

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Publication number
EP0801676A2
EP0801676A2 EP96941582A EP96941582A EP0801676A2 EP 0801676 A2 EP0801676 A2 EP 0801676A2 EP 96941582 A EP96941582 A EP 96941582A EP 96941582 A EP96941582 A EP 96941582A EP 0801676 A2 EP0801676 A2 EP 0801676A2
Authority
EP
European Patent Office
Prior art keywords
cells
tissue
cell
differentiating
tissues
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Withdrawn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
EP96941582A
Other languages
German (de)
French (fr)
Inventor
Michael Sittinger
Olaf Schultz
Gerd R. Burmester
Thomas Häupl
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.)
TRANSTISSUE TECHNOLOGIES GMBH
Original Assignee
TRANSTISSUE TECHNOLOGIES GmbH
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
Priority claimed from DE19540487A external-priority patent/DE19540487A1/en
Priority claimed from DE19632404A external-priority patent/DE19632404A1/en
Application filed by TRANSTISSUE TECHNOLOGIES GmbH filed Critical TRANSTISSUE TECHNOLOGIES GmbH
Publication of EP0801676A2 publication Critical patent/EP0801676A2/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
    • C12N5/06—Animal cells or tissues; Human cells or tissues
    • C12N5/0602—Vertebrate cells
    • C12N5/0652—Cells of skeletal and connective tissues; Mesenchyme
    • C12N5/0655—Chondrocytes; Cartilage
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
    • A61K35/12—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N2503/00—Use of cells in diagnostics
    • C12N2503/04—Screening or testing on artificial tissues

Definitions

  • the invention relates to new artificial tissues, processes for their production and their use and cell interaction systems for inducing artificial tissues for the purpose of producing vital grafts and for establishing disease models.
  • Such cell interaction culture systems for in vitro organ and tissue models are suitable for the production of three-dimensional cell tissue with the aid of three-dimensional carrier structures which allow the formation of an extracellular matrix (ECM), but initially do not yet have an ECM.
  • ECM extracellular matrix
  • Numerous cell culture systems are known in which an extracellular matrix (ECM) has been described.
  • Patent document DE 3410631 presents an implantation material for restoring defective cartilage or bone, which is either in gel form or embedded in natural or artificial bone material.
  • the gel contains embryonic species-specific chondrocytes or mesenchymal cells and preferably also an extracellular matrix of chondrocytes and growth hormones.
  • US Pat. No. 4801299 proposes body implants in the form of an extracellular matrix based on collagen.
  • a method for tissue regeneration with the help of an extracellular matrix induction forms the subject of US 4935000.
  • Extracellular matrices continue to be found in connection with the restoration of human skin, cosmetic compositions (US 5055298) and on a collagen or fibronectin basis for attaching T- Cells (US 5188959 and 5354686) use.
  • DE 4336399 describes collagen (type I) as the basic matrix for the stationary phase of bipolar adhered hepatocytes in a cell culture.
  • the functional immobilization of enzymes, proteins and whole cells on solid, biocompatible carrier materials by means of electrostatic interaction between the surface coating of the solid and the adsorbate to be fixed forms the subject of DE 4323487.
  • WO 92/20780 (DE 4116727), the simultaneous cultivation is different Mammalian cells, the separate extraction of different mammalian cell products and the modeling of organ interactions on a humoral level are described.
  • methods have become known which start from polymer fiber bundles made of resorbable material, onto which isolated and expanded cells are placed and the bundles are implanted.
  • WO 90/12603 mentions three-dimensional support structures which are designed in the form of the organ to be replaced and are mixed with the desired cells. With three-dimensional support structures, however, there is a difficulty in providing the cells inside the implant with sufficient nutrients.
  • the invention has for its object to provide new artificial tissues, to develop processes for their manufacture and to enable their medical use.
  • new artificial interacting tissues consist of new three-dimensional extracellular matrices (ECM) in networkable structures, cell interaction systems for the induction of artificial three-dimensional tissues as well as genetically manipulated cells that release immunosuppressive or cell-differentiating factors.
  • ECM extracellular matrices
  • cell interaction systems are used to induce artificial three-dimensional tissues in such a way that cultures which have or develop an extracellular matrix are connected to one another via membranes or are in direct contact or mixed with one another.
  • an artificial cell tissue for example cartilage or bone tissue
  • the task of stabilizing the grafts was achieved by genetic manipulation of cells, in particular in that human cells were equipped with certain genes, for example bone morphogenic protein, interleukin-1 receptor antagonist or TGF- ⁇ , and then became one new cartilage tissues are grown.
  • the invention consists of a combination of new and known elements that work together to create products with new and improved properties.
  • the cell interaction system according to the invention (FIG. 1) consists of the nutrient solution / the cooling container 1, the drop formation chamber 2, the mixing chamber 3, the perfusion chamber 4 (with hot plate), the quantity measuring device 5 (optical control), the sampling 6, the medium outlet chamber 7 and the interface / PC 8.
  • three-dimensional cell tissue with the help of three-dimensional support structures, eg absorbable polymer nonwovens.
  • a cartilage tissue e.g. undifferentiated (increased) cartilage cells or undifferentiated mesenchymal progenitor cells are used. Differentiated cartilage cells from the patient are usually only available in small quantities (surgical intervention necessary).
  • an undifferentiated cell suspension is mixed with the body's own cells or cell aggregates of a defined (differentiated) phenotype, b) defined (e.g. differentiated) or genetically manipulated foreign cells are suspended in a gel or fleece and around the tissue or stored directly on the tissue to be differentiated.
  • the arrangement of this method creates a defined contact zone between two artificial three-dimensional cell tissues. This contact zone serves as a test system for diseases. At the border zones, line and matrix changes, e.g. when administering medication.
  • the interaction cell culture systems according to the invention are suitable for use as in vitro organ and tissue models.
  • the induction of an artificial cell tissue into cartilage or bone tissue by transfected cell cultures or three-dimensional cultures of periosteal or perichondrium cells which have an extracellular Develop or own a matrix allow the construction of models for diseases in which the extracellular matrix plays a role.
  • the new interacting artificial tissues are used to produce vital grafts that are suitable for in-vitro simulation of pathogenic and infectious processes, for establishing disease models and for testing active substances.
  • FIG. 2 shows row and tissue arrangements.
  • Serial culture factors from the tissue (left) act on the tissue on the right. The factor from the tissue on the right does not affect the tissue on the left.
  • Sandwich culture Two or more artificial tissues lie on top of or next to each other (contact zones). Integrated culture. It is a mixture of different ones
  • Flowing cells A mixture of suspended cells (e.g. lymphocytes or microorganisms) flows along an artificial tissue (e.g.
  • Endothelium and adhere there when the cells express suitable receptors.
  • Figure 3 - Top picture: The purpose of the cell mixture is to differentiate as many of the undifferentiated cells as possible with the few differentiated or differentiating cells. 80% of the undifferentiated mesenchymal cells and 20% of the differentiated cartilage cells are together in one tissue (tissue 1). Non-body or genetically manipulated cells are arranged around the tissue 1 if they produce differentiating factors.
  • the transplantable cartilaginous tissues stabilized according to the invention consist of a new extracellular matrix (ECM) in three-dimensional structures, of increased nodule cells, of crosslinkable / polymerizable polypeptides or polysaccharides and of cells which, due to genetic engineering, release matrix molecules, immunosuppressive or cell-differentiating factors.
  • ECM extracellular matrix
  • Their structures are composed of three-dimensional fiber structures, three-dimensional tissues, fibrin and a semipermeable membrane surrounding the artificial knot system.
  • a desired shape is composed, for example, of a silicone negative, chamfer wool or fiber structures made of resorbable polymers, such as a-hydroxy acids, and the semi-permeable membrane made of polyelectrolyte complexes, such as polylysine or hyaluronic acid.
  • the process for the production of transplantable knot tissue consists in that knotty cell suspensions containing polymerizable solutions and gene therapy modified cells are filled in three-dimensional structures, solidified with thrombin or polymerization-inducing factors, the cells in this three-dimensional structure produce a new extracellular matrix (ECM) and the knot system with semipermeable membrane is surrounded.
  • ECM extracellular matrix
  • the polymerizable solutions consist of crosslinkable / polymerizable polypeptides or polysaccharides and the modified cells from those that release matrix molecules, immunosuppressive or cell-differentiating factors due to genetic engineering manipulation.
  • Fibrinogen is used as the polypeptide in such a way that cell suspensions containing fibrinogen are filled into structures made from three-dimensional fiber structures or from three-dimensional tissues and solidified with thrombin. The fibrinogen is obtained from the patient from whom the cells originate and / or into which the three-dimensional knot tissue is to be implanted.
  • all or part of the cells are genetically modified with one or more of the following genes: TGF-ß, bone morphogenetic proteins, morphogenes, receptors for morphogenes, anti-inflammatory cytokines, cytokine antagonists such as IL-1 antagonists, IL-1 receptor antagonists, TNF antagonists or with protease inhibitors (TIMP, PAI).
  • TGF-ß bone morphogenetic proteins
  • morphogenes morphogenes
  • receptors for morphogenes anti-inflammatory cytokines
  • cytokine antagonists such as IL-1 antagonists, IL-1 receptor antagonists, TNF antagonists or with protease inhibitors (TIMP, PAI).
  • TGF-ß transforming growth factor-1
  • morphogenes morphogenes
  • receptors for morphogenes anti-inflammatory cytokines
  • cytokine antagonists such as IL-1 antagonists, IL-1 receptor antagonists, TNF antagonists or with protease inhibitors (TIM
  • Another feature of the invention is that genetically manipulated and unchanged cells are introduced into separate artificial tissues and shaped and combined to form a total tissue or shaped tissues with genetically manipulated cells and tissues with unchanged cells in layers or by wrapping or two or more tissues with each different genetic manipulations can be combined in layers or by wrapping. Tissues containing genetically manipulated cells can be combined with tissues containing genetically unmodified cells.
  • the cartilage tissue produced according to the invention has in particular immunosuppressive properties. It has surprisingly been found that the invention
  • Kno ⁇ elgewebe is suitable and that the Kno ⁇ elelgewebe invention can be used for the therapy of Kno ⁇ lschamels in patients with rheumatoid arthritis. It is also surprising that the semipermeable membrane used in accordance with the invention, with which the produced cartilage tissue is surrounded before, during and for some time after the implantation, offers protection against immunological and dedifferentiating
  • Example 1 Three-dimensional cell tissue A three-dimensional cell tissue is produced with the aid of three-dimensional carrier structures (resorbable polymer fleece). (A) undifferentiated (increased) nodule cells or (b) undifferentiated mesenchymal progenitor cells are used for the production of a nodular tissue. The cells to be distributed in the fleece structure are first suspended in a fibrinogen solution. The cell suspension is filled into the fleece carrier and solidified by adding thrombin.
  • three-dimensional carrier structures resorbable polymer fleece.
  • the differentiating micro environment can be any suitable material.
  • Tissue components that produce or release paracrine kno ⁇ el-differentiating factors are created.
  • factors are e.g. bone mo ⁇ hogenetic proteins, cartilage drived mo ⁇ hogenetic proteins, transformig growth factor beta (Luvten, F.P. et al.,
  • the arrangement of this method creates a defined contact zone between two artificial three-dimensional cell tissues. 0
  • Increased nodule cells or mesenchymal progenitor cells of different degrees of maturation and differentiation are suspended in a fibrinogen solution, the cell suspension is distributed in a resociable polymer fleece, factors or components of the corresponding extracellular matrix that are conducive to the growth and differentiation process are added and solidified by adding thrombin and differentiating Exposed to micro-milieu.
  • Cells of osteogenic origin of different maturation and differentiation levels 5 or mesenchymal progenitor cells are suspended in a fibrinogen solution, the cell suspension is distributed in a reso ⁇ ie ⁇ aren polymer construct, factors or components of the corresponding extracellular matrix, which are conducive to the growth and differentiation process, added and solidified by adding thrombin and exposed to a differentiating micro environment.
  • Example 7 Transplantation of artificially produced cartilage tissue for the therapy of cartilage damage in patients with rheumatoid arthritis
  • Mesenchymal cells of a patient's tissue sample are sufficiently grown in vitro in monolayer culture and partially transfected with a gene for BMP (bone mo ⁇ hogenetic protein).
  • the cells are suspended in a fibrinogen-containing solution and then placed in a carrier structure (for example resorbable polymer nonwovens made of polylactide and polyglycolide).
  • the suspension is then solidified in the structure by adding thrombin.
  • the tissue can be transplanted into the patient's joint immediately or after in vitro maturation.
  • Example 8 Other Artificial Tissues - Bones, Liver, Kidney, Vessels, Skin Comparable to Example 1, part of the cells are manipulated with a desired gene and this gene therapy-modified population is brought into a specific form using carrier structures and fibrin. Genetically unmodified cells are then attached to this structure, likewise using shaping structures, so that a diffusion and thus activity gradient for genetically introduced active substances can act on the untreated cells. This serves to polarize the tissue structures produced in vitro, comparable to the polarization in the native articular cartilage.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Organic Chemistry (AREA)
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Abstract

The invention relates to new artificial tissues which comprise three-dimensional extracellular matrixes (ECM) in cross-linkable structures, cell interaction systems for inducing artificial three-dimensional tissues and which comprise genetically manipulated cells releasing immunosuppressive or cell-differentiating factors. The tissues according to the invention are suitable for producing vital transplants and for establishing models of diseases.

Description

Neue künstliche Gewebe, Verfahren zu ihrer Herstellung und ihre VerwendungNew artificial tissues, processes for their production and their use
Beschreibungdescription
Die Erfindung betrifft neue künstliche Gewebe, Verfahren zu ihrer Herstellung und ihre Verwendung sowie Zellinteraktionssysteme zur Induktion künstlicher Gewebe zum Zwecke der Herstellung vitaler Transplantate und zur Etablierung von Krankheitsmodellen. Derartige Zellinteraktionskultursysteme für in vitro Organ- und Gewebemodelle eignen sich zur Herstellung dreidimensionaler Zellgewebe mit Hilfe dreidimensionaler Trägerstrukturen, die die Bildung einer extrazellulären Matrix (ECM) erlauben, aber zunächst selbst noch keine ECM aufweisen. Die enge Interaktion artifizieller Gewebe ermöglicht den Aufbau von Modellen für Erkrankungen, wobei an den Grenzzonen Zeil- und Matrixveränderungen durch äußere Einflüsse, z.B. durch Medikamentengabe, geprüft werden können. Es sind zahlreiche Zellkultursysteme bekannt, in denen eine extrazelluläre Matrix (ECM) beschrieben worden ist. So wird in der Patentschrift DE 3410631 ein Implantationsmaterial zur Wiederherstellung defekter Knorpel oder Knochen vorgestellt, das entweder in Gelform oder eingebettet in natürliches oder künstliches Knochenmaterial vorliegt. Das Gel enthält embryonale artspezifische Chondrozyten oder Mesenchymzellen und vorzugsweise auch eine extrazelluläre Matrix von Chondrozyten und Wachstumshormone. In der US (US- Patentschrift) 4801299 werden Körperimplantate in Form einer extrazellulären Matrix auf der Basis von Kollagen vorgeschlagen.The invention relates to new artificial tissues, processes for their production and their use and cell interaction systems for inducing artificial tissues for the purpose of producing vital grafts and for establishing disease models. Such cell interaction culture systems for in vitro organ and tissue models are suitable for the production of three-dimensional cell tissue with the aid of three-dimensional carrier structures which allow the formation of an extracellular matrix (ECM), but initially do not yet have an ECM. The close interaction of artificial tissues enables the development of models for diseases, with line and matrix changes at the border zones due to external influences, e.g. can be checked by medication. Numerous cell culture systems are known in which an extracellular matrix (ECM) has been described. Patent document DE 3410631, for example, presents an implantation material for restoring defective cartilage or bone, which is either in gel form or embedded in natural or artificial bone material. The gel contains embryonic species-specific chondrocytes or mesenchymal cells and preferably also an extracellular matrix of chondrocytes and growth hormones. US Pat. No. 4801299 proposes body implants in the form of an extracellular matrix based on collagen.
Eine Methode zur Geweberegenerierung mit Hilfe einer extrazellulären Matrix- Induktion bildet den Gegenstand der US 4935000. Extrazelluläre Matrizes finden weiterhin im Zusammenhang mit der Wiederherstellung der menschlichen Haut, kosmetischen Kompositionen (US 5055298) sowie auf Kollagen- oder Fibronektin-Basis zum Anheften von T-Zellen (US 5188959 und 5354686) Verwendung. Kollagen (Typ I) als Grundmatrix für die stationäre Phase bipolar adhärierter Hepatozyten einer Zellkultur wird in der DE 4336399 beschrieben. Die funktioneile Immobilisierung von Enzymen, Proteinen und ganzen Zellen auf festen, biokompatiblen Trägermaterialien mittels elektrostatischer Wechselwirkung zwischen der Oberflächenbeschichtung des Festkörpers und dem zu fixierenden Adsorbat bildet den Gegenstand der DE 4323487. In der WO 92/20780 (DE 4116727) wird die gleichzeitige Kultivierung unterschiedlicher Säugerzellen, die separate Gewinnung verschiedener Säugerzellprodukte sowie die Modellierung von Organwechselwirkungen auf humoraler Ebene beschrieben. Bei der Herstellung von Implantaten sind Verfahren bekannt geworden, die von Polymerfaserbündeln aus resorbierbarem Material ausgehen, auf das isolierte und vermehrte Zellen gebracht und die Bündel implantiert werden. In der WO 90/12603 werden dreidimensionale Trägerstrukturen genannt, die in der Form des zu ersetzenden Organs ausgebildet und mit den gewünschten Zellen versetzt sind. Bei dreidimensionalen Trägerstrukturen besteht jedoch die Schwierigkeit, die Zellen im Inneren des Implantates ausreichend mit Nährstoffen zu versorgen.A method for tissue regeneration with the help of an extracellular matrix induction forms the subject of US 4935000. Extracellular matrices continue to be found in connection with the restoration of human skin, cosmetic compositions (US 5055298) and on a collagen or fibronectin basis for attaching T- Cells (US 5188959 and 5354686) use. DE 4336399 describes collagen (type I) as the basic matrix for the stationary phase of bipolar adhered hepatocytes in a cell culture. The functional immobilization of enzymes, proteins and whole cells on solid, biocompatible carrier materials by means of electrostatic interaction between the surface coating of the solid and the adsorbate to be fixed forms the subject of DE 4323487. In WO 92/20780 (DE 4116727), the simultaneous cultivation is different Mammalian cells, the separate extraction of different mammalian cell products and the modeling of organ interactions on a humoral level are described. In the manufacture of implants, methods have become known which start from polymer fiber bundles made of resorbable material, onto which isolated and expanded cells are placed and the bundles are implanted. WO 90/12603 mentions three-dimensional support structures which are designed in the form of the organ to be replaced and are mixed with the desired cells. With three-dimensional support structures, however, there is a difficulty in providing the cells inside the implant with sufficient nutrients.
Mit der DE 4306661 wird die Herstellung eines Implantates aus Zellkulturen beansprucht. Demnach werden Knorpelzellen auf eine resorbierbare, vorgeformte, dreidimensionale Trägerstruktur - die der gewünschten Struktur des Implantates entspricht - gebracht und die Struktur mit einem Material ummantelt, durch das eine Nährlösung diffundieren kann. Auf diese Weise läßt sich durch ein Aneinanderbinden von Zellen eine interzelluläre Matrix ausbilden. Das künstlich hergestellte Knorpelgewebe ist während und nach einer Transplantation einer Reihe von negativen Einflüssen ausgesetzt, die eine langfristige Stabilität des Gewebes gefährden (Buja-J et al., Ann-Rheum-Dis. 1994 Apr. 53(4): 229-34). Besonders wichtig ist dies z.B. bei Patienten, die unter Arthrose oder rheumatoider Arthritis leiden. Hier muß das implantierte Gewebe den krankhaft degenerativen und entzündlichen Prozessen lokal entgegenwirken. Es sind mehrere Verfahren zur Herstellung transplantierbarer Knorpelersatzgewebe bekannt (Vacanti CA et al., Plastic and Reconstructive Surgery, 8:753-759, 1991 ; Sittinger M. et al., Biomaterials 1994, 15:451-456).DE 4306661 claims the production of an implant from cell cultures. Accordingly, cartilage cells are placed on a resorbable, preformed, three-dimensional support structure - which corresponds to the desired structure of the implant - and the structure is coated with a material through which a nutrient solution can diffuse. In this way, an intercellular matrix can be formed by binding cells together. The artificially produced cartilage tissue is exposed to a number of negative influences during and after a transplant, which endanger the long-term stability of the tissue (Buja-J et al., Ann-Rheum-Dis. 1994 Apr. 53 (4): 229-34) . This is particularly important e.g. in patients suffering from osteoarthritis or rheumatoid arthritis. Here the implanted tissue must counteract the pathologically degenerative and inflammatory processes locally. Several methods are known for producing transplantable cartilage replacement tissues (Vacanti CA et al., Plastic and Reconstructive Surgery, 8: 753-759, 1991; Sittinger M. et al., Biomaterials 1994, 15: 451-456).
Es sind auch Möglichkeiten beschrieben worden, Zellen der Gelenkinnenhaut ex vivo mit vorwiegend antientzündlichen Genen auszustatten und dann wieder zu implantieren (Evans, C. H. and P. D. Robbins, 1994: Gene therapy for arthritis. In Gene therapeutics: Methods and applications of direct gene transfer. J. A. Wolff, editor. Birkhäuser, Boston, 312-343).Possibilities have also been described of providing cells of the inner joint skin with predominantly anti-inflammatory genes ex vivo and then implanting them again (Evans, CH and PD Robbins, 1994: Gene therapy for arthritis. In Gene therapeutics: Methods and applications of direct gene transfer. JA Wolff, editor.Birkhauser, Boston, 312-343).
Der Erfindung liegt die Aufgabe zugrunde, neue künstliche Gewebe zur Verfügung zu stellen, Verfahren zu ihrer Herstellung zu entwickeln und ihre medizinische Anwendung zu ermöglichen.The invention has for its object to provide new artificial tissues, to develop processes for their manufacture and to enable their medical use.
Die Aufgabe wurde durch die Bereitstellung neuer künstlicher interagierender Gewebe gelöst, die aus neuen dreidimensionalen extrazellulären Matrizes (ECM) in vernetzbaren Strukturen, Zeilinteraktionssystemen zur Induktion künstlicher dreidimensionaler Gewebe sowie aus gentechnisch manipulierten Zellen, die immunsuppressive oder zelldifferenzierende Faktoren freisetzen, bestehen. Erfindungsgemäß werden Zeilinteraktionssysteme zur Induktion künstlicher dreidimensionaler Gewebe derart eingesetzt, daß Kulturen, die eine extrazelluläre Matrix besitzen oder entwickeln, miteinander über Membranen verbunden sind oder in direktem Kontakt stehen oder miteinander vermengt sind. So erfolgt die Induktion eines artifiziellen Zellgewebes zu z.B. Knorpel- oder Knochengewebe durch transfizierte Zellkulturen oder dreidimensionale Kulturen von Periost- oder Perichondriumzellen. Die Aufgabe, eine Stabilisierung der Transplantate zu erreichen, wurde durch eine genetische Manipulation von Zellen gelöst, insbesondere dadurch, daß menschliche Zellen mit bestimmten Genen, z.B. bone morphogenic protein, lnterleukin-1-Rezeptor-Antagonist oder TGF-ß ausgestattet und danach zu einem neuen Knorpelgewebe gezüchtet werden.The task was solved by the provision of new artificial interacting tissues, which consist of new three-dimensional extracellular matrices (ECM) in networkable structures, cell interaction systems for the induction of artificial three-dimensional tissues as well as genetically manipulated cells that release immunosuppressive or cell-differentiating factors. According to the invention, cell interaction systems are used to induce artificial three-dimensional tissues in such a way that cultures which have or develop an extracellular matrix are connected to one another via membranes or are in direct contact or mixed with one another. Thus, an artificial cell tissue, for example cartilage or bone tissue, is induced by transfected cell cultures or three-dimensional cultures of periosteal or perichondrial cells. The task of stabilizing the grafts was achieved by genetic manipulation of cells, in particular in that human cells were equipped with certain genes, for example bone morphogenic protein, interleukin-1 receptor antagonist or TGF-β, and then became one new cartilage tissues are grown.
Die Erfindung besteht in einer Kombination neuer und bekannter Elemente, die derart zusammenwirken, daß Produkte mit neuen und verbesserten Eigenschaften entstehen. Das erfindungsgemäße Zellinteraktionssystem (Figur 1) besteht aus der Nährlösung/ dem Kühlbehälter 1, der Tropfenbildungskammer 2, der Mischungskammer 3, der Perfusionskammer 4 (mit Wärmeplatte), der Mengenmessungseinrichtung 5 (optische Kontrolle), der Probeentnahme 6, der Mediumauslaufkammer 7 und dem Interface/ PC 8. Erfindungsgemäß werden dreidimensionale Zellgewebe mit Hilfe dreidimensionaler Trägerstrukturen, z.B. resorbierbare Polymervliese, hergestellt. Für die Herstellung eines Knorpelgewebes z.B. werden entdifferenzierte (vermehrte) Knorpelzellen oder undifferenzierte mesenchymale Vorläuferzellen verwendet. Differenzierte Knorpelzellen vom Patienten stehen normalerweise nur in geringer Menge (operativer Eingriff notwendig) zur Verfügung.The invention consists of a combination of new and known elements that work together to create products with new and improved properties. The cell interaction system according to the invention (FIG. 1) consists of the nutrient solution / the cooling container 1, the drop formation chamber 2, the mixing chamber 3, the perfusion chamber 4 (with hot plate), the quantity measuring device 5 (optical control), the sampling 6, the medium outlet chamber 7 and the interface / PC 8. According to the invention three-dimensional cell tissue with the help of three-dimensional support structures, eg absorbable polymer nonwovens. For the production of a cartilage tissue e.g. undifferentiated (increased) cartilage cells or undifferentiated mesenchymal progenitor cells are used. Differentiated cartilage cells from the patient are usually only available in small quantities (surgical intervention necessary).
Um ein differenzierendes Mikromilieu zu schaffen, wird a) eine undifferenzierte Zellsuspension mit körpereigenen Zellen oder Zellaggregaten eines definierten (differenzierten) Phänotyps gemischt, werden b) definierte (z.B. differenzierte) oder genetisch manipulierte körperfremde Zellen in einem Gel oder Vlies suspendiert und um das Gewebe herum bzw. direkt an das zu differenzierende Gewebe gelagert. Die Anordnung dieses Verfahrens stellt eine definierte Kontaktzone zwischen zwei artifiziellen dreidimensionalen Zellgeweben her. Diese Kontaktzone dient als Testsystem für Erkrankungen. An den Grenzzonen können Zeil- und Matrixveränderungen, z.B. bei der Gabe von Medikamenten, geprüft werden.To create a differentiating micro-environment, a) an undifferentiated cell suspension is mixed with the body's own cells or cell aggregates of a defined (differentiated) phenotype, b) defined (e.g. differentiated) or genetically manipulated foreign cells are suspended in a gel or fleece and around the tissue or stored directly on the tissue to be differentiated. The arrangement of this method creates a defined contact zone between two artificial three-dimensional cell tissues. This contact zone serves as a test system for diseases. At the border zones, line and matrix changes, e.g. when administering medication.
Die erfindungsgemäßen Interaktionszellkultursysteme eignen sich zur Verwendung als in vitro Organ- und Gewebemodelle. Überraschenderweise hat sich herausgestellt, daß z.B. die Induktion eines artifiziellen Zellgewebes zu Knorpel- oder Knochengewebe durch transfizierte Zellkulturen oder dreidimensionale Kulturen von Periost- oder Perichondriumzellen, die eine extrazelluläre Matrix entwickeln oder besitzen, den Aufbau von Modellen für Erkrankungen erlauben, bei denen insbesondere die extrazelluläre Matrix eine Rolle spielt. Die Verwendung der neuen interagierenden künstlichen Gewebe besteht in der Herstellung vitaler Transplantate, die zur in-vitro Simulation pathogenetischer und infektiöser Prozesse, zur Etablierung von Krankheitsmodellen und zur Testung von Wirkstoffen geeignet sind.The interaction cell culture systems according to the invention are suitable for use as in vitro organ and tissue models. Surprisingly, it has been found that, for example, the induction of an artificial cell tissue into cartilage or bone tissue by transfected cell cultures or three-dimensional cultures of periosteal or perichondrium cells which have an extracellular Develop or own a matrix, allow the construction of models for diseases in which the extracellular matrix plays a role. The new interacting artificial tissues are used to produce vital grafts that are suitable for in-vitro simulation of pathogenic and infectious processes, for establishing disease models and for testing active substances.
Figur 2 zeigt Zeil- und Gewebeanordnungen Serielle Kultur: Faktoren aus dem Gewebe (links) wirken auf das Gewebe rechts. Der Faktor aus dem Gewebe rechts wirkt nicht auf das Gewebe links. Sandwich-Kultur: Zwei oder mehrere künstliche Gewebe liegen übereinander oder aneinander (Kontaktzonen). Integrierte Kultur. Dabei handelt es sich um eine Mischung unterschiedlicherFIG. 2 shows row and tissue arrangements. Serial culture: factors from the tissue (left) act on the tissue on the right. The factor from the tissue on the right does not affect the tissue on the left. Sandwich culture: Two or more artificial tissues lie on top of or next to each other (contact zones). Integrated culture. It is a mixture of different ones
Zellen zum Zwecke der Differenzierung eines Gewebes. Fließende Zellen: Ein Gemisch suspendierter Zellen (z.B. Lymphozyten oder auch Mikroorganismen) strömen entlang eines artifiziellen Gewebes (z.B.Cells for the purpose of differentiating a tissue. Flowing cells: A mixture of suspended cells (e.g. lymphocytes or microorganisms) flows along an artificial tissue (e.g.
Endothel) und haften dort an, wenn die Zellen passende Rezeptoren exprimieren.Endothelium) and adhere there when the cells express suitable receptors.
Figur 3: - oberes Bild: Der Zweck der Zellmischung besteht darin, mit den wenigen differenzierten bzw. differenzierenden Zellen möglichst viele der undifferenzierten Zellen zu differenzieren. 80% der undifferenzierten mesenchymalen Zellen und 20% der differenzierten Knorpelzellen befinden sich zusammen in einem Gewebe (Gewebe 1). Körperfremde oder genetisch manipulierte Zellen werden, wenn sie differenzierende Faktoren produzieren, um das Gewebe 1 herum angeordnet.Figure 3: - Top picture: The purpose of the cell mixture is to differentiate as many of the undifferentiated cells as possible with the few differentiated or differentiating cells. 80% of the undifferentiated mesenchymal cells and 20% of the differentiated cartilage cells are together in one tissue (tissue 1). Non-body or genetically manipulated cells are arranged around the tissue 1 if they produce differentiating factors.
- unteres Bild (Kontaktzone): Bei der rheumatoiden Arthritis zerstören synoviale Zellen in den Gelenken der Patienten den Gelenkknorpel, indem seine Oberfläche und extrazelluläre Matrix zerstört werden und schließlich synoviale Zellen in den Knorpel eindringen.- Bottom picture (contact zone): In rheumatoid arthritis, synovial cells in the joints of the patients destroy the articular cartilage by destroying its surface and extracellular matrix, and finally synovial cells penetrate the cartilage.
Die erfindungsgemäß stabilisierten transplantierbaren Knoφelgewebe bestehen aus einer neuen extrazellulären Matrix (ECM) in dreidimensionalen Strukturen, aus vermehrten Knoφβlzellen, aus vernetzbaren / polymerisierbaren Polypeptiden oder Polysacchanden und aus Zellen, die aufgrund gentechnischer Manipulation Matrixmoleküle, immunsuppressive oder zelldifferenzierende Faktoren freisetzen. Ihre Strukturen sind aus dreidimensionalen Faserstrukturen, dreidimensionalen Geweben, aus Fibrin und aus einer das künstliche Knoφβlsystem umgebenden semipermeablen Membran zusammengesetzt. Eine gewünschte Form setzt sich z.B. aus einem Silicon-Negativ, Fasenwolle oder Faserstrukturen aus resorbierbaren Polymeren, wie a-Hydroxysäuren und die semipermeable Membran aus Polyelektrolytkomplexen, wie Polylysin oder Hyaluronsaure zusammen. Die Verfahren zur Herstellung von transplantierbarem Knoφelgewebe bestehen darin, daß polymerisierbare Lösungen enthaltende Knoφelzellsuspensionen und gentherapeutisch veränderte Zellen in dreidimensionale Strukturen gefüllt, mit Thrombin oder polymerisationsinduzierenden Faktoren verfestigt, die Zellen in dieser dreidimensionalen Struktur eine neue extrazelluläre Matrix (ECM) produzieren und das Knoφelsystem mit einer semipermeablen Membran umgeben wird.The transplantable cartilaginous tissues stabilized according to the invention consist of a new extracellular matrix (ECM) in three-dimensional structures, of increased nodule cells, of crosslinkable / polymerizable polypeptides or polysaccharides and of cells which, due to genetic engineering, release matrix molecules, immunosuppressive or cell-differentiating factors. Their structures are composed of three-dimensional fiber structures, three-dimensional tissues, fibrin and a semipermeable membrane surrounding the artificial knot system. A desired shape is composed, for example, of a silicone negative, chamfer wool or fiber structures made of resorbable polymers, such as a-hydroxy acids, and the semi-permeable membrane made of polyelectrolyte complexes, such as polylysine or hyaluronic acid. The process for the production of transplantable knot tissue consists in that knotty cell suspensions containing polymerizable solutions and gene therapy modified cells are filled in three-dimensional structures, solidified with thrombin or polymerization-inducing factors, the cells in this three-dimensional structure produce a new extracellular matrix (ECM) and the knot system with semipermeable membrane is surrounded.
Die polymerisierbaren Lösungen bestehen aus vemetzbaren / polymerisierbaren Polypeptiden oder Polysacchariden und die veränderten Zellen aus solchen, die aufgrund gentechnischer Manipulation Matrixmoleküle, immunsuppressive oder zelldifferenzierende Faktoren freisetzen. Als Polypeptid wird Fibrinogen in der Weise eingesetzt, daß fibrinogenhaltige Zellsuspensionen in Strukturen aus dreidimensionalen Faserstrukturen oder aus dreidimensionalen Geweben gefüllt und mit Thrombin verfestigt werden. Das Fibrinogen wird aus dem Patienten gewonnen, von dem die Zellen stammen und/oder in den das dreidimensionale Knoφelgewebe implantiert werden soll. Erfindungsgemäß werden alle oder ein Teil der Zellen mit einem oder mehreren der folgenden Gene gentherapeutisch verändert: TGF-ß, bone moφhogenetic proteins, Moφhogene, Rezeptoren für Moφhogene, antiinflammatorische Zytokine, Zytokinantagonisten, wie IL-1- Antagonisten, IL-1-Rezeptorantagonist, TNF-Antagonisten oder mit Proteaseinhibitoren (TIMP, PAI). Dabei lassen sich verschiedene Zellen mit jeweils nur einer genetischen Manipulation oder mehrere Zellen mit verschiedenen genetischen Manipulationen mit unveränderten Zellen kombinieren. Die eingebrachten Gene werden vorübergehend oder permanent exprimiert. Überraschenderweise lassen sich Formgebung und genetische Manipulation einsetzen, um eine Polarisierung, basierend auf einer ungleichen Verteilung von genetisch manipulierten Zellen und unveränderten Zellen, zu erreichen.The polymerizable solutions consist of crosslinkable / polymerizable polypeptides or polysaccharides and the modified cells from those that release matrix molecules, immunosuppressive or cell-differentiating factors due to genetic engineering manipulation. Fibrinogen is used as the polypeptide in such a way that cell suspensions containing fibrinogen are filled into structures made from three-dimensional fiber structures or from three-dimensional tissues and solidified with thrombin. The fibrinogen is obtained from the patient from whom the cells originate and / or into which the three-dimensional knot tissue is to be implanted. According to the invention, all or part of the cells are genetically modified with one or more of the following genes: TGF-ß, bone morphogenetic proteins, morphogenes, receptors for morphogenes, anti-inflammatory cytokines, cytokine antagonists such as IL-1 antagonists, IL-1 receptor antagonists, TNF antagonists or with protease inhibitors (TIMP, PAI). Different cells can be combined with only one genetic manipulation or several cells with different genetic manipulations with unchanged cells. The genes introduced are expressed temporarily or permanently. Surprisingly, shaping and genetic manipulation can be used to achieve polarization based on an uneven distribution of genetically manipulated cells and unchanged cells.
Ein weiteres Merkmal der Erfindung besteht darin, daß genetisch manipulierte und unveränderte Zellen in getrennte künstliche Gewebe eingebracht und geformt und zu einem Gesamtgewebe kombiniert oder geformte Gewebe mit genetisch manipulierten Zellen und Gewebe mit unveränderten Zellen schichtweise oder durch Umhüllung oder zwei bzw. mehrere Gewebe mit jeweils verschiedenen genetischen Manipulationen schichtweise oder durch Umhüllung kombiniert werden. Gewebe, die genetisch manipulierte Zellen enthalten, lassen sich mit Geweben, die genetisch unveränderten Zellen enthalten, kombinieren.Another feature of the invention is that genetically manipulated and unchanged cells are introduced into separate artificial tissues and shaped and combined to form a total tissue or shaped tissues with genetically manipulated cells and tissues with unchanged cells in layers or by wrapping or two or more tissues with each different genetic manipulations can be combined in layers or by wrapping. Tissues containing genetically manipulated cells can be combined with tissues containing genetically unmodified cells.
Die erfindungsgemäß hergestellten Knoφelgewebe besitzen insbesondere immunsuppressive Eigenschaften. Es hat sich überraschenderweise herausgestellt, daß die erfindungsgemäßeThe cartilage tissue produced according to the invention has in particular immunosuppressive properties. It has surprisingly been found that the invention
Vorgehensweise zum in vivo Schutz und zur in vivo Erhaltung in vitro hergestellterProcedure for in vivo protection and for in vivo maintenance of in vitro manufactured
Knoφelgewebe geeignet ist und daß die erfindungsgemäßen Knoφelgewebe zur Therapie von Knoφβlschäden bei Patienten mit rheumatoider Arthritis eingesetzt werden können. Es ist ferner überraschend, daß die erfindungsgemäß eingesetzte semipermeable Membran, mit der die hergestellte Knoφelgewebe vor, während und einige Zeit nach der Implantation umgeben werden, Schutz bieten vor immunologischen und dedifferenzierendenKnoφelgewebe is suitable and that the Knoφelelgewebe invention can be used for the therapy of Knoφβlschamels in patients with rheumatoid arthritis. It is also surprising that the semipermeable membrane used in accordance with the invention, with which the produced cartilage tissue is surrounded before, during and for some time after the implantation, offers protection against immunological and dedifferentiating
Reaktivitäten.Reactivities.
Die Erfindung soll anhand von Ausführungsbeispielen näher erläutert werden.The invention will be explained in more detail with the aid of exemplary embodiments.
Ausführungsbeispieleembodiments
Beispiel 1: Dreidimensionales Zellgewebe Ein dreidimensionales Zellgewebe wird mit Hilfe dreidimensionaler Trägerstrukturen (resorbierbares Polymervlies) hergestellt. Für die Herstellung eines Knoφeigewebes werden (a) entdifferenzierte (vermehrte) Knoφelzellen oder (b) undifferenzierte mesenchymale Vorläuferzellen verwendet. Die in der Vliesstruktur zu verteilenden Zellen werden dabei erst in einer Fibrinogenlösung suspendiert. Die Zellsuspension wird in den Vliesträger gefüllt und durch Thrombinzugabe verfestigt.Example 1: Three-dimensional cell tissue A three-dimensional cell tissue is produced with the aid of three-dimensional carrier structures (resorbable polymer fleece). (A) undifferentiated (increased) nodule cells or (b) undifferentiated mesenchymal progenitor cells are used for the production of a nodular tissue. The cells to be distributed in the fleece structure are first suspended in a fibrinogen solution. The cell suspension is filled into the fleece carrier and solidified by adding thrombin.
Beispiel 2: Differenzierendes MikromilieuExample 2: Differentiating micro environment
Um ein differenzierendes Mikromilieu zu schaffen, wird (A) eine undifferenzierteTo create a differentiating micro environment, (A) becomes an undifferentiated one
Zellsuspension mit köφereigenen Zellen oder Zellaggregaten eines differenzierten Phänotyps 5:1 gemischt, (B) differenzierte - aber köφerfremde - Zellen in einem Gel oderCell suspension mixed with endogenous cells or cell aggregates of a differentiated phenotype 5: 1, (B) differentiated - but foreign - cells in a gel or
Polymervlies suspendiert und rund um das Gewebe bzw. direkt an das zu differenzierendePolymer fleece suspended and around the tissue or directly to the differentiated
Gewebe angelagert.Tissue attached.
Das differenzierende Mikromilieu kannThe differentiating micro environment can
1. durch differenzierte Knoφelzellen 2. mit BMP (bone moφhogenetic protein) transfizierten Zellen 3. mit allen Zellen (Periost und Perichondriumzellen), Geweben (Periost, Synovia) oder1. by differentiated bony cells 2. cells transfected with BMP (bone moφhogenetic protein) 3. with all cells (periosteum and perichondrium cells), tissues (periosteum, synovia) or
Gewebekomponenten (Matrix), die parakrin Knoφel-differenzierende Faktoren produzieren oder freisetzen, geschaffen werden. Derzeit bekannte Faktoren sind z.B. bone moφhogenetic proteins, cartilage drived moφhogenetic proteins, transformig growth factor beta (Luvten, F.P. et al.,Tissue components (matrix) that produce or release paracrine knoφel-differentiating factors are created. Currently known factors are e.g. bone moφhogenetic proteins, cartilage drived moφhogenetic proteins, transformig growth factor beta (Luvten, F.P. et al.,
Acta Orthop. Belg., 58 Suppl. 1 (1992) 263-267; Exp. Cell Res. 1994, 210: 224-9; Chang,Acta Orthop. Belg., 58 Suppl. 1 (1992) 263-267; Exp. Cell Res. 1994, 210: 224-9; Chang,
S.C. et al., J. Biol. Chem. 1994, 269: 28227-28234).S.C. et al., J. Biol. Chem. 1994, 269: 28227-28234).
Die Anordnung dieses Verfahrens stellt eine definierte Kontaktzone zwischen zwei artifiziellen dreidimensionalen Zellgeweben her. 0The arrangement of this method creates a defined contact zone between two artificial three-dimensional cell tissues. 0
Beispiel 3: Modell Rheumatoide ArthritisExample 3: Rheumatoid arthritis model
Aggressive Zellen aus der Synovia eines Patienten mit rheumatoider Arthritis (3D-GewebeAggressive cells from the synovia of a patient with rheumatoid arthritis (3D tissue
1) invadieren das Knoφβlzellgewebe (3D-Gewebe 2) in vitro.1) invade the cell tissue (3D tissue 2) in vitro.
5 Beispiel 4: Knoφelgewebe5 Example 4: Cartilage
Vermehrte Knoφelzellen oder mesenchymale Vorläuferzellen unterschiedlichen Reifungs¬ und Differenzierungsgrades werden in einer Fibrinogenlösung suspendiert, die Zellsuspension in einem resoΦierbaren Polymervlies verteilt, Faktoren oder Komponenten der entsprechenden extrazellulären Matrix, die dem Wachstums- und o Differenzierungsprozeß förderlich sind, zugesetzt und durch Thrombinzugabe verfestigt und einem differenzierenden Mikromilieu ausgesetzt.Increased nodule cells or mesenchymal progenitor cells of different degrees of maturation and differentiation are suspended in a fibrinogen solution, the cell suspension is distributed in a resociable polymer fleece, factors or components of the corresponding extracellular matrix that are conducive to the growth and differentiation process are added and solidified by adding thrombin and differentiating Exposed to micro-milieu.
Beispiel 5: KnochengewebeExample 5: Bone tissue
Zellen osteogenen Ursprungs unterschiedlichen Reifungs- und Differenzierungs-grades 5 oder mesenchymale Vorläuferzellen werden in einer Fibrinogenlösung suspendiert, die Zellsuspension in einem resoΦieΦaren Polymerkonstukt verteilt, Faktoren oder Komponenten der entsprechenden extrazellulären Matrix, die dem Wachstums- und Differenzierungsprozeß förderlich sind, zugesetzt und durch Thrombinzugabe verfestigt und einem differenzierenden Mikromilieu ausgesetzt. oCells of osteogenic origin of different maturation and differentiation levels 5 or mesenchymal progenitor cells are suspended in a fibrinogen solution, the cell suspension is distributed in a resoΦieΦaren polymer construct, factors or components of the corresponding extracellular matrix, which are conducive to the growth and differentiation process, added and solidified by adding thrombin and exposed to a differentiating micro environment. O
Beispiel 6: Modell "Rheumatoide Arthritis / in-vitro Pannusgewebe"Example 6: Model "Rheumatoid Arthritis / In Vitro Pannus Tissue"
Zellen der Synovialmembran eines Patienten mit rheumatoider Arthritis (3D-Gewebe 1) treten wie im Beispiel 3 mit Knoφelzellgewebe (3D-Gewebe 2) in vitro in Wechselwirkung.Cells of the synovial membrane of a patient with rheumatoid arthritis (3D tissue 1), as in Example 3, interact with cartilage cell tissue (3D tissue 2) in vitro.
5 Beispiel 7: Transplantation von künstlich hergestelltem Knoφelgewebe zur Therapie von Knoφelschäden bei Patienten mit rheumatoider Arthritis Mesenchymale Zellen einer Gewebeprobe eines Patienten werden in vitro ausreichend in Monolayerkultur vermehrt und teilweise mit einem Gen für BMP (bone moφhogenetic protein) transfiziert. Die Zellen werden in einer fibrinogenhaltigen Lösung suspendiert und dann in eine Trägerstruktur gebracht (z.B. resorbierbare Polymervliese aus Polylaktid und Polyglykolid). Die Suspension wird dann in der Struktur durch Thrombinzugabe verfestigt. Das Gewebe kann sofort oder nach einer in vitro Reifung in das Gelenk des Patienten transplantiert werden.5 Example 7: Transplantation of artificially produced cartilage tissue for the therapy of cartilage damage in patients with rheumatoid arthritis Mesenchymal cells of a patient's tissue sample are sufficiently grown in vitro in monolayer culture and partially transfected with a gene for BMP (bone moφhogenetic protein). The cells are suspended in a fibrinogen-containing solution and then placed in a carrier structure (for example resorbable polymer nonwovens made of polylactide and polyglycolide). The suspension is then solidified in the structure by adding thrombin. The tissue can be transplanted into the patient's joint immediately or after in vitro maturation.
Beispiel 8: Andere künstliche Gewebe - Knochen, Leber, Niere, Gefäße, Haut Vergleichbar zu Beispiel 1 wird ein Teil der Zellen mit einem gewünschten Gen manipuliert und diese gentherapeutisch veränderte Population unter Verwendung von Trägerstrukturen und Fibrin in eine bestimmte Form gebracht. Dieser Struktur werden dann genetisch unveränderte Zellen ebenfalls unter Verwendung formgebender Strukturen angelagert, so daß ein Diffusions- und damit Wirkungsgradient für gentechnisch eingebrachte Wirkstoffe auf die unbehandelten Zellen einwirken kann. Dies dient zur Polarisierung der in vitro hergestellten Gewebestrukturen vergleichbar der Polarisierung im nativen Gelenkknorpel. Example 8: Other Artificial Tissues - Bones, Liver, Kidney, Vessels, Skin Comparable to Example 1, part of the cells are manipulated with a desired gene and this gene therapy-modified population is brought into a specific form using carrier structures and fibrin. Genetically unmodified cells are then attached to this structure, likewise using shaping structures, so that a diffusion and thus activity gradient for genetically introduced active substances can act on the untreated cells. This serves to polarize the tissue structures produced in vitro, comparable to the polarization in the native articular cartilage.

Claims

Patentansprüche claims
1. Neue künstliche Gewebe, bestehend aus neuen dreidimensionalen extrazellulären Matrizes (ECM) in vemetzbaren Strukturen, Zeilinteraktionssystemen zur Induktion künstlicher dreidimensionaler Gewebe sowie aus gentechnisch manipulierten Zellen, die immunsuppressive oder zelldifferenzierende Faktoren freisetzen.1. New artificial tissues, consisting of new three-dimensional extracellular matrices (ECM) in cross-linkable structures, cell interaction systems for inducing artificial three-dimensional tissues as well as genetically manipulated cells that release immunosuppressive or cell-differentiating factors.
2. Gewebe nach Anspruch 1, dadurch gekennzeichnet, daß die Zellinteraktionssysteme zur Induktion künstlicher dreidimensionaler Gewebe aus Kulturen bestehen, die eine extrazelluläre Matrix besitzen oder entwickeln, miteinander über Membranen verbunden sind oder in direktem Kontakt stehen oder miteinander vermengt sind.2. Tissue according to claim 1, characterized in that the cell interaction systems for inducing artificial three-dimensional tissues consist of cultures which have or develop an extracellular matrix, are connected to one another via membranes or are in direct contact or are mixed with one another.
3. Gewebe und Zellinteraktionssysteme nach Anspruch 1 und 2, dadurch gekennzeichnet, daß zur Induktion eines artifiziellen Zellverbandes zu Knoφel- oder Knochengewebe genetisch manipulierte Zellen oder dreidimensionale Kulturen von Periost- oder Perichondriumzellen in einem differenzierenden Mikromilieu eingesetzt werden.3. Tissue and cell interaction systems according to claim 1 and 2, characterized in that genetically manipulated cells or three-dimensional cultures of periosteal or perichondrium cells are used in a differentiating microenvironment for induction of an artificial cell assembly to knoφel or bone tissue.
4. Verfahren zur Herstellung neuer künstlicher Gewebe mit Hilfe von Zeilinteraktionssystemen, dadurch gekennzeichnet, daß vermehrbare Zellen unterschiedlichen Reifungs- und Differenzierungsgrades suspendiert, die Zellsuspension in einem resorbierbaren Polymervlies verteilt, Faktoren oder Komponenten der entsprechenden extrazellulären Matrix, die dem Wachstums- und Differenzierungsprozeß förderlich sind, zugesetzt und einem differenzierenden Mikromilieu ausgesetzt werden.4. A process for the production of new artificial tissues with the aid of cell interaction systems, characterized in that multiplicable cells suspend different degrees of maturation and differentiation, the cell suspension is distributed in a resorbable polymer fleece, factors or components of the corresponding extracellular matrix which are conducive to the growth and differentiation process , added and exposed to a differentiating micro environment.
5. Verfahren zur Herstellung neuer Gewebe nach Anspruch 4, dadurch gekennzeichnet, daß zur Gewinnung eines Knoφeigewebes mit Hilfe des Zeilinteraktionssystems vermehrte Knoφelzellen oder mesenchymale Voriäuferzellen unterschiedlichen Reifungs- und Differenzierungsgrades in einer Fibrinogenlösung suspendiert, die Zellsuspension in einem resorbierbaren Polymervlies verteilt, Faktoren oder Komponenten der entsprechenden extrazellulären Matrix, die dem Wachstums- und Differenzierungsprozeß förderlich sind, zugesetzt, durch Thrombinzugabe verfestigt und einem differenzierenden Mikromilieu ausgesetzt werden.5. A method for producing new tissue according to claim 4, characterized in that to obtain a Knoφeigeweses with the help of the cell interaction system increased Knoφelzellen or mesenchymal progenitor cells different degrees of maturation and differentiation suspended in a fibrinogen solution, the cell suspension distributed in a resorbable polymer fleece, factors or components of appropriate extracellular matrix, which are conducive to the growth and differentiation process, added, solidified by adding thrombin and exposed to a differentiating microenvironment.
6. Verfahren zur Herstellung neuer Gewebe nach Anspruch 4, dadurch gekennzeichnet, daß zur Gewinnung eines Knochengewebes mit Hilfe des Zeilinteraktionssystems Zellen osteogenen Ursprungs unterschiedlichen Reifungs- und Differenzierungsgrades oder mesenchymale Voriäuferzellen in einer Fibrinogenlösung suspendiert, die Zellsuspension in einem resorbierbaren Polymerkonstrukt verteilt, Faktoren oder Komponenten der entsprechenden extrazellulären Matrix, die dem Wachstums- und Differenzierungsprozeß förderlich sind, zugesetzt, durch Thrombinzugabe verfestigt und einem differenzierenden Mikromilieu ausgesetzt werden.6. A process for the production of new tissues according to claim 4, characterized in that for obtaining a bone tissue using the cell interaction system cells osteogenic origin of different degrees of maturation and differentiation or mesenchymal precursor cells suspended in a fibrinogen solution, the cell suspension distributed in a resorbable polymer construct, factors or components of the corresponding extracellular matrix that are conducive to the growth and differentiation process added, solidified by adding thrombin and exposed to a differentiating microenvironment become.
7. Verfahren nach Anspmch 4, dadurch gekennzeichnet, daß zur Erzeugung eines differenzierenden Mikromilieus eine Suspension voher vermehrter, undifferenzierter Zellen mit autologen Zellen oder Zellaggregaten eines definierten Phänotyps gemischt und in direkten Kontakt mit einem Gel oder Polymervlies, das differenzierte, köφerfremde Zellen enthält, gebracht wird.7. The method according to Anspmch 4, characterized in that to produce a differentiating micromilieus a suspension of previously propagated, undifferentiated cells mixed with autologous cells or cell aggregates of a defined phenotype and brought into direct contact with a gel or polymer fleece which contains differentiated, foreign cells becomes.
8. Verfahren nach Anspmch 4 bis 7, dadurch gekennzeichnet, daß das differenzierende Mikromilieu a) durch differenzierte Knoφelzellen b) mit BMP (bone moφhogenetic protein), TGF oder verwandte Faktoren produzierende Zellen, wobei diese in unterschiedlicher Weise zweckentsprechend genetisch manipuliert sein können, c) durch alle Zellen (z.B. Periost- oder Perichondriumzellen), Gewebe (Periost,8. The method according to Anspmch 4 to 7, characterized in that the differentiating micro-environment a) by differentiated Knoφelzells b) with BMP (bone moφhogenetic protein), TGF or related factors producing cells, which can be genetically manipulated in different ways, c ) through all cells (e.g. periosteal or perichondrial cells), tissue (periosteal,
Synovia) oder Gewebekomponenten (Matrix), die knoφeldifferenzierende Faktoren produzieren oder freisetzen, erzeugt wird.Synovia) or tissue components (matrix) that produce or release nodule-differentiating factors.
9. Verwendung neuer interagierender künstlicher Gewebe nach Anspmch 1 bis 8 zur Herstellung vitaler Transplantate, zur in-vitro Simulation pathogenetischer und infektiöser Prozesse, zur Etabliemng von Krankheitsmodellen und zur Testung von Wirkstoffen.9. Use of new interacting artificial tissues according to Claim 1 to 8 for the production of vital grafts, for the in-vitro simulation of pathogenic and infectious processes, for the establishment of disease models and for the testing of active substances.
10.Verwendung nach Anspmch 9, dadurch gekennzeichnet, daß zur Etabliemng eines Modells "Rheumatoide Arthritis / in-vitro Pannusgewebe" Zellen der Synovialmembran eines Patienten mit rheumatoider Arthritis (3D-Gewebe 1) mit Knoφelzellgewebe (3D- Gewebe 2) in vitro in Wechselwirkung treten. 10.Use according to Anspmch 9, characterized in that to establish a model "rheumatoid arthritis / in-vitro pannus tissue" cells of the synovial membrane of a patient with rheumatoid arthritis (3D tissue 1) with Knoφelzellgewebe (3D tissue 2) in vitro interaction to step.
EP96941582A 1995-10-20 1996-10-18 New artificial tissue, method for the production and the use thereof Withdrawn EP0801676A2 (en)

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DE19632404A DE19632404A1 (en) 1996-08-02 1996-08-02 Artificial tissue comprising three-dimensional extracellular matrix, cell interaction system
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