EP1100871A2 - Verfahren zur herstellung einer knorpelzellsuspension - Google Patents
Verfahren zur herstellung einer knorpelzellsuspensionInfo
- Publication number
- EP1100871A2 EP1100871A2 EP99931242A EP99931242A EP1100871A2 EP 1100871 A2 EP1100871 A2 EP 1100871A2 EP 99931242 A EP99931242 A EP 99931242A EP 99931242 A EP99931242 A EP 99931242A EP 1100871 A2 EP1100871 A2 EP 1100871A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- serum
- cartilage
- cells
- cartilage cells
- frozen
- 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- Withdrawn
Links
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
- A61P19/00—Drugs for skeletal disorders
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
-
- 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
Definitions
- the invention relates to a method for producing a cartilage cell suspension which is to be used for the treatment of cartilage defects in the knee joint.
- Cartilage is a tissue that consists of 70 to 80% by weight water.
- the structure of the cartilage is such that the cartilage cells are distributed in a matrix that is produced and excreted by the cartilage cells.
- cartilage In contrast to bone, cartilage is not supplied by the nervous, vascular or lymphatic systems.
- the matrix of the articular cartilage essentially consists of type II collagen and the proteoglycans.
- Proteoglycans are proteins with long polysaccharide chains, the glycosaminoglycans. These include keratan sulfate, chondroitin 4 sulfate and chondroitin 6 sulfate.
- Cartilage cells are isolated from a piece of the patient's cartilage and grown in vitro in a culture medium containing fetal calf serum. After the in vitro propagation, these cartilage cells are first used to produce an artificial piece of cartilage tissue in vitro, in which the cartilage cells are stimulated to produce an extracellular matrix.
- This matrix consists of collagen fibrils and sulfated proteoglycans, which include chondroitin-6-sulfate and keratan sulfate.
- an artificial piece of cartilage tissue is grown in vitro, which consists of cartilage cells distributed in a matrix consisting of substances produced and excreted by these cartilage cells.
- This artificial cartilage tissue can then be transplanted to the patient.
- a disadvantage of this method is that the use of foreign sera, here fetal calf serum, cannot prevent the transmission of diseases which can be caused by viruses or bacteria, for example.
- foreign sera here fetal calf serum
- spongioform bovine encephalopathy spongioform bovine encephalopathy
- cartilage cells to be transplanted can be contaminated with foreign proteins when cultivated with fetal calf serum and that problems with immunological reactions can occur in the patient after the transplantation.
- cartilage defects in the knee joint by transplanting in vitro cultivated cartilage cells into the damaged area of the cartilage tissue was already done in 1994 by Brittberg et al. in the New England Journal of Medicine 331, pages 889-895.
- Cartilage cells are isolated from the patient's cartilage. These cells are multiplied in vitro and a cartilage cell suspension is produced which contains approximately 2.6 to 5 ⁇ 10 ⁇ cells. This cartilage cell suspension is then surgically transplanted into the patient's cartilage defects.
- the company co.don ® Society for Molecular Medicine and Biotechnology mbH offers a modified process for cartilage cell isolation and reproduction as a service. However, no antibiotics or fungistatic agents are added to the culture medium. This is to ensure that the cells' ability to proliferate and differentiate is retained.
- a disadvantage of this cultivation method for cartilage cells is, however, that the cartilage cells cannot be frozen.
- the company co.don ® explains that it is important for long-term therapy success to keep the cartilage cells differentiable. This is not possible if cartilage cells after the Propagation would be frozen because the freezing of cartilage cells leads to the formation of different stages of maturity.
- the disadvantage of not being able to freeze the cartilage cells after the multiplication is, in particular, that the doctor is forced at a predetermined point in time after the removal of the cartilage cells to transplant the cartilage cell suspension produced from these cartilage cells back into the patient. This time inflexibility is economically very disadvantageous for those involved such as the doctor, the health insurance companies and the patient.
- the technical task was therefore to find a process for producing cartilage cell suspensions in which the problems mentioned do not occur.
- it was the task to make the period between cartilage removal and cartilage cell transplantation flexible and still prevent the risk of irreversible dedifferentiation and loss of the ability of the cells to proliferate through cultivation over a longer period of time.
- the technical problem was solved by a method for producing a cartilage cell suspension, the cartilage cells being propagated in a culture medium which contains serum or serum substitute and the cartilage cells being frozen at a temperature of below -10 ° C. after the cell multiplication.
- These cartilage cells preferably originate from cartilage tissue isolated from patients.
- the cartilage cells are grown in a culture medium which contains 5 to 50% by volume of serum or serum replacement, preferably 10% by volume of serum or serum replacement.
- This serum is selected from the group consisting of human serum, fetal calf serum, calf serum, serum from other mammalian species, serum from other animal species or combinations thereof. It is particularly advantageous to use the patient's own serum or serum substitute, since here the transmission of diseases from other organisms and immunological reactions to foreign proteins can be completely ruled out.
- the cells are frozen in a medium which contains human serum, fetal calf serum, calf serum, serum from other mammalian species, serum from other animal species, serum replacement, serum albumin or combinations thereof.
- a medium which contains human serum, fetal calf serum, calf serum, serum from other mammalian species, serum from other animal species, serum replacement, serum albumin or combinations thereof.
- the use of the patient's own serum or serum replacement is particularly advantageous.
- cartilage cells are frozen in a medium which contains antifreeze agents which are selected from the Group alkyl sulfoxides, for example methyl ethyl sulfoxide, diethyl sulfoxide, dibutyl sulfoxide, methyl butyl sulfoxide, ethyl butyl sulfoxide, dimethyl sulfoxide, or other suitable cell-penetrating organic solvents such as, for example, polyalcohols such as ethylene glycol, propylene glycol, butanediol, glycerol or combinations thereof.
- anti-freeze agents ensure the viability of the cartilage cells after freezing and thawing.
- cartilage cells are frozen in a medium which contains a glycosaminoglycan, preferably hyaluronic acid, dermatan sulfate, heparin sulfate, keratan sulfate, chondroitin sulfate or combinations thereof.
- a glycosaminoglycan preferably hyaluronic acid, dermatan sulfate, heparin sulfate, keratan sulfate, chondroitin sulfate or combinations thereof.
- cartilage cells are frozen according to the following scheme:
- the cartilage cell suspension is at a rate of -0.1 ° C to -30 ° C per minute, preferably at a rate of -0.1 ° C to -3 ° C per minute, particularly preferably at -1 ° C per minute Temperatures cooled down to -150 ° C. After a temperature of up to -150 ° C has been reached, the cells can be brought into an environment which has a temperature of below -130 ° C, preferably of -196 ° C. The freezing speed can be varied in this last step.
- the cartilage cells can be frozen at any time after the start of the individual multiplication steps.
- the cartilage cells to be multiplied and the human serum which is added to the culture medium come from the same individual.
- the cartilage cells are in their
- cells are used which, after stimulation, differentiate into cells which produce the extracellular matrix which is typical for articular cartilage, where they include substances such as type II collagen and sulfated proteoglycans, which, for example, chondroitin 6-sulfate, chondroitin Contain 4-sulfate and keratan sulfate.
- substances such as type II collagen and sulfated proteoglycans, which, for example, chondroitin 6-sulfate, chondroitin Contain 4-sulfate and keratan sulfate.
- the procedure is in particular as follows.
- Cartilage tissues are isolated from humans or from a mammal or other animal species. These cartilage tissues can be hyaline articular cartilage, nasal septum cartilage or costal cartilage. Chondrocytes are isolated from the removed cartilage tissue by adding proteolytic enzymes, for example pronase, papain, collagenase, trypsin, chondroitinase ABC, chondroitinase AC II, hyaluronidase, elastase, cathepsin G or mixtures thereof, in a test tube. The cells to be isolated are cartilage cells, which are also called chondrocytes. The following cells are defined as cartilage cells in the sense of this application:
- cells isolated from cartilage tissue which are also called chondrocytes
- Cells such as cartilage cells, other cells from Mammaliem or other animals, but also plant cells, bacterial cells, and cells from other organisms that differentiate after stimulation into cells that produce the extracellular matrix typical of articular cartilage, whereby they include substances such as type II collagen and sulfated proteoglycans, which contain, for example, chondroitin 6 sulfate, chondroitin 4 sulfate and keratan sulfate; 3.
- cartilage cells such as cartilage cells, other cells from Mammaiiem or other animals, but also plant cells, bacterial cells, and cells from other organisms that produce extracellular matrix typical for the articular cartilage, whereby they include substances such as type II Collagen and sulfated proteoglycans, for example
- cartilage cells are grown in a culture medium. It is also possible to genetically modify and multiply the isolated cartilage cells.
- the multiplication of the cartilage cells takes place in a culture medium with or without serum, ⁇ -ketoglutarate, L-glutamine, buffer, vitamin C and / or other vitamin addition as well as with and without antibacterial active substances and / or antifungal substances.
- the serum additive to the culture medium can be selected from the group of human serum, fetal calf serum, calf serum, serum from other mammalian species, serum from other animal species, serum replacement or combinations thereof.
- Antifreezes which can be used are alkyl sulfoxides, for example methyl ethyl sulfoxide, diethyl sulfoxide, dibutyl sulfoxide, methyl butyl sulfoxide, ethyl butyl sulfoxide, but preferably dimethyl sulfoxide (DMSO) or other suitable cell-penetrating organic solvents, such as, for example, polyalcohols, for example ethylene glycol, propylene glycol, butanediol and glycerol combinations, and glycerol combinations Antifreeze among themselves.
- DMSO dimethyl sulfoxide
- polyalcohols for example ethylene glycol, propylene glycol, butanediol and glycerol combinations, and glycerol combinations Antifreeze among themselves.
- the freezing medium can consist of 90 vol.% Serum and 10 vol.% DMSO or 40 vol.% Serum, 50 vol.% Culture medium and 10% DMSO.
- Glycosaminoglycans for example hyaluronic acid, dermatan sulfate, heparin sulfate, keratin sulfate, but preferably chondroitin
- suifat in a concentration of 1 to 10 wt .-%, preferably 2.5 wt .-% are added to a freezing medium.
- This freezing medium can consist of 1 to 95% by volume of serum, preferably 10 to 90% by volume of serum.
- a cultural dium can be any buffered physiological solution, for example buffered
- Saline solutions and culture media such as DMEM (Dulbecco's Modified Eagle Medium) can be used.
- the freezing medium can contain other additives such as ⁇ -tocopherol, vitamin C, synovial fluid, hyaluronic acid and lecithin.
- the cells are frozen directly in the culture bottle or in other glass or plastic vessels, preferably cryotubes.
- the cells should be subjected to the following freezing procedure within 360 minutes, preferably after 30 to 40 minutes after the addition of the freezing medium:
- the cartilage cells are at a rate of -0.1 ° C to -30 ° C per minute, preferably -0.1 ° C to -3 ° C per minute, particularly preferably at -1 ° C per minute to temperatures of up to -150 ° C frozen. After reaching a temperature of up to -150 ° C, preferably from -70 ° C to -80 ° C, the frozen cartilage cell suspension can be brought to temperatures below -130 ° C, preferably to -196 ° C.
- articular cartilage tissue which is removed from the weight-loaded and / or non-weight-loaded area of human knee joints, is digested in order to isolate the chondrocytes. To do this, proceed as follows: 1. The removed cartilage tissue is washed several times with sterile GBSS (Gey 's buffered saline, Gibco) and then cut into small pieces with a scalpel in a sterile glass petri dish (approx. 1 mm 3 ).
- GBSS Gibco
- the solution containing the digested cartilage is suctioned off and centrifuged through a nylon filter with a pore size of 20 or 50 ⁇ m (Spectrapor) into a 50 ml centrifuge tube (Greiner). The centrifugation
- the cell pellet is washed twice with 10 ml of HBSS (Hanks buffered saline, Gibco), with the cell suspension then 5 minutes each time.
- HBSS Hormoned saline
- the isolated chondrocytes obtained above are in a density of about 1 x 10 2 to 5 x 10 6 cells / cm 2 , preferably with a density of 5 x 10 2 to 1 x 10 5 cells / cm 2 , particularly preferably with a density of
- DMEM Dulbecco's Modified Eagle Medium, Gibco
- a 3: 1 or 1: 1 mixture of DMEM and Nutrient Mixture Ham's F12 (Gibco) can be used as the culture medium, which additionally contains 10% human serum.
- the culture medium is first suctioned off and the chondrocytes adhering to the bottom with PBS (Dulbecco's phosphate-buffered saline solution without Ca + - or
- trypsin-EDTA ethylenediaminetetraacetic acid
- Trypsin 1 250 describes a trypsin preparation, whereby 1 g trypsin degrades 250 g substrate. The trypsin has the task of cleaving the adhesion proteins, while EDTA binds all divalent cations.
- the culture bottle is then placed in an incubator at 37 ° C. for 5, better for 10 to 15 minutes. 5. After the ⁇ -minute incubation in the incubator, the proteolytic enzymes in the cell suspension are inactivated by adding the culture medium, the final concentration of human serum being 10% (v / v). The chondrocytes are now centrifuged again
- the chondrocytes are then either further cultivated and, if appropriate, subcultured in order to move to a later one
- the chondrocytes are centrifuged for 5 minutes at 150 to 200 x g at 4 ° C. The supernatant is removed. Sufficient fresh, ice-cooled (antibiotic-free) culture medium with 10% (v / v) human serum is added to the cell suspension so that the cells are twice as concentrated as is ultimately desired for cryopreservation.
- the chondrocyte suspension is then poured into chilled cryotubes in small 1 ml portions. Each of these tubes contains approximately 1 x 10 6 cells.
- the chondrocytes in the vapor phase which forms above the liquid phase in the nitrogen storage container, can now be cooled at a defined rate. This cooling rate is approximately -1 ° C per minute.
- a polystyrene box can also be used, which has a wall thickness of 2 to 4 cm, preferably 5 to 10 mm.
- the polystyrene box is closed and placed in a -70 ° C freezer, in which the cells then cool at a rate of approximately -1 ° C per minute. After approximately 12 hours, the cartilage cells are transferred to the nitrogen storage container.
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Genetics & Genomics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- Medicinal Chemistry (AREA)
- Public Health (AREA)
- General Chemical & Material Sciences (AREA)
- Rheumatology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biotechnology (AREA)
- Zoology (AREA)
- Pharmacology & Pharmacy (AREA)
- Wood Science & Technology (AREA)
- Microbiology (AREA)
- Cell Biology (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
- Physical Education & Sports Medicine (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Materials For Medical Uses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19835368A DE19835368C1 (de) | 1998-08-05 | 1998-08-05 | Verfahren zur Herstellung einer Knorpelzellsuspension |
DE19835368 | 1998-08-05 | ||
PCT/EP1999/004600 WO2000008130A2 (de) | 1998-08-05 | 1999-07-02 | Verfahren zur herstellung einer knorpelzellsuspension |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1100871A2 true EP1100871A2 (de) | 2001-05-23 |
Family
ID=7876548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99931242A Withdrawn EP1100871A2 (de) | 1998-08-05 | 1999-07-02 | Verfahren zur herstellung einer knorpelzellsuspension |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1100871A2 (de) |
JP (1) | JP2003508008A (de) |
DE (1) | DE19835368C1 (de) |
WO (1) | WO2000008130A2 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10038700B4 (de) * | 2000-07-31 | 2006-09-07 | Michael Priv.-Doz. Dr. Sittinger | Autologe Bindegewebe, Verfahren zu ihrer Herstellung und ihre Verwendung |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5897987A (en) * | 1996-03-25 | 1999-04-27 | Advanced Reproduction Technologies, Inc. | Use of arabinogalactan in cell cryopreservation media |
US5919702A (en) * | 1996-10-23 | 1999-07-06 | Advanced Tissue Science, Inc. | Production of cartilage tissue using cells isolated from Wharton's jelly |
-
1998
- 1998-08-05 DE DE19835368A patent/DE19835368C1/de not_active Expired - Fee Related
-
1999
- 1999-07-02 JP JP2000563757A patent/JP2003508008A/ja not_active Withdrawn
- 1999-07-02 WO PCT/EP1999/004600 patent/WO2000008130A2/de not_active Application Discontinuation
- 1999-07-02 EP EP99931242A patent/EP1100871A2/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO0008130A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2000008130A2 (de) | 2000-02-17 |
JP2003508008A (ja) | 2003-03-04 |
WO2000008130A3 (de) | 2000-05-11 |
DE19835368C1 (de) | 2000-02-10 |
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