WO1999005262A2 - Verfahren zur gewinnung eines epithelialen zellverbandes - Google Patents
Verfahren zur gewinnung eines epithelialen zellverbandes Download PDFInfo
- Publication number
- WO1999005262A2 WO1999005262A2 PCT/EP1998/004613 EP9804613W WO9905262A2 WO 1999005262 A2 WO1999005262 A2 WO 1999005262A2 EP 9804613 W EP9804613 W EP 9804613W WO 9905262 A2 WO9905262 A2 WO 9905262A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cell
- culture
- epithelial cell
- mechanical stress
- obtaining
- Prior art date
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
- C12N5/0625—Epidermal cells, skin cells; Cells of the oral mucosa
- C12N5/0629—Keratinocytes; Whole skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/60—Materials for use in artificial skin
Definitions
- the invention relates to a method for obtaining an epithelial cell assembly which considerably reduces the time required for the cultivation of human skin and epidermal grafts.
- Adhesion is a determining factor for the speed of cell proliferation and is a prerequisite for successful transfer of the cells from the culture to a wound surface. Adhesion can be improved by using "feeder-layer fibroblasts", but these increase the risk of rejection of the graft, so that they are not used if possible.
- Difficulties in transplantation can also arise from the fact that the epithelial cell assembly grown on an artificial substrate, after its enzymatic detachment from the substrate, shows changes in the cell surfaces which impair the adhesion of the transplant to the wound tissue.
- the task therefore was to improve and, in particular, to accelerate the previously known methods for obtaining transplantable cells of human skin.
- an epithelial cell assembly in which a cell culture of human skin tissue after several days of treatment in a culture medium is transferred to a biodegradable matrix, which contains fibroblasts, and is subjected to mechanical stress until the matrix surface coexists a coherent, epithelial cell structure is covered.
- the human skin tissue used for cell culture consists of epithelial cells of the epidermis, that is to say of keratinocytes, melanocytes and fibroblasts, which are removed from the epidermis or the skin of the patient and multiplied under cell culture conditions.
- the growth of the cell structure is considerably accelerated by the action of mechanical stimuli such as pressure, stretching, compression or the action of shear forces. Particularly favorable results are achieved if the mechanical stress is caused by shear forces which are generated when culture media flow over the cell cultures.
- the action of mechanical forces on the cell culture not only increases the proliferation activity of the cells but also increases the mechanical strength of the cell layers and stimulates their differentiation. This enables the formation of multilayer epithelia. If there is no mechanical stimulus, predominantly one- or two-layer epithelia develop and the time between the sowing of the cells and their growth to a transplantable cell lawn is significantly longer.
- epithelial cell groups are always used in dermatological wound treatment, the promotion of proliferation speed and tissue differentiation that can be achieved by mechanical stress can also be demonstrated in the human epidermal cell line (HaCaT) that is frequently used in research laboratories.
- FIG. 1 shows how, under these conditions, the number of cells which characterize keratinocyte growth increases without mechanical irritation and with mechanical irritation over a period of three weeks.
- the decrease in the number of cells that occurs between the ninth and twelfth days can be explained by the fact that a phase differentiation surge takes place in this phase, by means of which the number of cells is reduced.
- keratinocytes melanocytes and / or fibroblasts
- a suspension of keratinocytes, melanocytes and / or fibroblasts is obtained therefrom by methods known per se. These are either sown in plastic cell culture dishes or on a deformable matrix, covered with a commercially available culture medium suitable for epidermal cells and thus propagated. The cultures are then subjected to cyclic movements of the culture medium over a period of 4 to 6 days, then resuspended and transferred to a biodegradable matrix which contains fibroblasts.
- the matrix is then again subjected to mechanical stimulation, which further stimulates the growth of the cells and to a confluence of the cells, ie to a complete one Covering the matrix surface with keratinocytes leads.
- the resulting cell structure is suitable for transplantation to the recipient.
- a particularly advantageous method for obtaining transplantable epithelial cell groups is based on a biodegradable material on which the keratinocytes and / or melanocytes grow.
- This material contains dermal fibroblasts, which in turn promote the growth and differentiation of the epidermis and begin to replace the artificial matrix with natural extracellular material even before the transplant.
- dermal fibroblasts which in turn promote the growth and differentiation of the epidermis and begin to replace the artificial matrix with natural extracellular material even before the transplant.
- Such a co-culture leads to a significant stimulation of growth and to the complexity of the epidermal cells even without mechanical irritation. However, if such a coculture is exposed to mechanical stress, this leads to an activation of the fibroblasts and thus to a considerable acceleration of the growth of the cell structure.
- Various substrates can be used as biodegradable materials, including layers or networks of artificially produced and crosslinked polymers such as hyaluronic acid, polylactic acid or polyurethane.
- the epithelial cell assembly can be obtained in the following way:
- the fibroblasts obtained from the skin samples taken are sown in a 6-well multi-dish and treated in the same way as the keratinocytes.
- the fibroblasts are then removed from the shell by trypsinization or by the action of an ethylene-diaminetetraacetic acid solution (to bind the calcium ions) and into a biodegradable matrix, e.g. a collagen gel or another matrix structure.
- a biodegradable matrix e.g. a collagen gel or another matrix structure.
- the gel is poured together with the fibroblasts into a silicone rubber chamber about 1 to 2 mm high. After the gel has solidified, the silicone rubber chamber is subjected to cyclical stretching. The extensions are 5 to 10% of the original length of the silicone chamber. The duration of each stretch cycle is 2 to 10 seconds.
- the culture of keratinocytes treated on a seesaw for 4 to 6 days is then applied to the gel.
- the keratinocytes then form a homogeneous cell layer and do not penetrate the gel.
- the entire system consisting of a matrix with fibroblasts and the resulting, in some cases, multi-layered keratinocyte covering can be transplanted.
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Organic Chemistry (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Genetics & Genomics (AREA)
- General Health & Medical Sciences (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Biotechnology (AREA)
- Dermatology (AREA)
- Epidemiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Cell Biology (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Microbiology (AREA)
- Transplantation (AREA)
- Veterinary Medicine (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Materials For Medical Uses (AREA)
- Prostheses (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU90678/98A AU9067898A (en) | 1997-07-26 | 1998-07-23 | Method for obtaining an epithelial cell sheet |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1997132194 DE19732194C1 (de) | 1997-07-26 | 1997-07-26 | Verfahren zur Gewinnung eines epithelialen Zellverbandes |
DE19732194.1 | 1997-07-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1999005262A2 true WO1999005262A2 (de) | 1999-02-04 |
WO1999005262A3 WO1999005262A3 (de) | 1999-04-15 |
Family
ID=7836972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/004613 WO1999005262A2 (de) | 1997-07-26 | 1998-07-23 | Verfahren zur gewinnung eines epithelialen zellverbandes |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU9067898A (de) |
DE (1) | DE19732194C1 (de) |
WO (1) | WO1999005262A2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004007699A2 (en) * | 2002-07-16 | 2004-01-22 | Biogentis Inc. | Method for preparing engineered tissue |
-
1997
- 1997-07-26 DE DE1997132194 patent/DE19732194C1/de not_active Expired - Fee Related
-
1998
- 1998-07-23 AU AU90678/98A patent/AU9067898A/en not_active Abandoned
- 1998-07-23 WO PCT/EP1998/004613 patent/WO1999005262A2/de active Application Filing
Non-Patent Citations (17)
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004007699A2 (en) * | 2002-07-16 | 2004-01-22 | Biogentis Inc. | Method for preparing engineered tissue |
WO2004007699A3 (en) * | 2002-07-16 | 2004-04-08 | Altertek Bio Inc | Method for preparing engineered tissue |
US7521231B2 (en) | 2002-07-16 | 2009-04-21 | Organogenesis, Inc. | Method for preparing engineered tissue |
Also Published As
Publication number | Publication date |
---|---|
WO1999005262A3 (de) | 1999-04-15 |
AU9067898A (en) | 1999-02-16 |
DE19732194C1 (de) | 1998-08-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69634454T2 (de) | Zusammensetzungen und Verfahren mit Bezug auf eine auf natürliche Weise sekretierte Matrix | |
DE69626035T2 (de) | Ein biologisches material, das eine wirksame kultur von knochenmarkstammzellen, die teilweise oder vollständing in bindegewebszellen differenziert sind, enthält, und eine dreidimensionale, bioverträgliche und biologische abbaubare matrix, die aus einen hyaluronsäurederivat besteht | |
DE69630129T2 (de) | Gebrauch von autologen, dermalen fibroblasten zur reperatur von haut- oder weichgewebeschäden | |
DE69726772T2 (de) | Hautäquivalent, das Langerhans-Zellen enthält | |
DE3751843T2 (de) | Herstellung von körperorganen durch kontroliertes zellwachstum auf künstlicher matrix | |
DE69127235T2 (de) | Biologisch verträgliche perforierte Membranen und ihre Verwendung als Kunsthaut | |
DE3876469T2 (de) | Hautaequivalent. | |
DE69532000T2 (de) | Herstellung eines zusammenziehbaren glatten muskels | |
DE69127353T2 (de) | Biomaterial auf kollagenbasis und seine anwendungen | |
US6057148A (en) | Apparatus for preparing skin cell culture | |
DE2651685C2 (de) | Züchtung von Keratinozyten | |
DE69432865T2 (de) | Implantierbare prothese, kit und vorrichtung zu deren herstellung | |
DE69733292T2 (de) | Verfahren zur in vitro Herstellung von Knochen | |
DE69233558T2 (de) | Keratinozyt-abstammende Granulate zur Verwendung als wundheilendes Mittel | |
WO1980001350A1 (en) | Skin-equivalent | |
EP1440148A2 (de) | Keratinozyten verwendbar als biologisch aktive substanz bei der behandlung von wunden | |
EP1290145A2 (de) | Dreidimensionales hautmodell | |
DE4438015A1 (de) | Epithelzellenhaltiges Biomaterial und dessen Verwendung als Transplantat | |
DE60027724T2 (de) | Verbesserte keratinozytenkultur und deren verwendungen | |
DE69832662T2 (de) | Verfahren zur Kultur von Hepatocyten | |
DE69333547T2 (de) | Therapeutische anwendungen von chimänischer organogenese | |
DE19732194C1 (de) | Verfahren zur Gewinnung eines epithelialen Zellverbandes | |
US20040247573A1 (en) | Dermal replacement prepared from mesenchymal cells of hair follicle | |
DE69837212T2 (de) | Verfahren zur induzierung der osteoblastischen differenzierung der zellen des menschlichen extramedullären fettgewebes | |
DE112019002479B4 (de) | Verfahren zur herstellung einer kollagen-laminin-matrix zur heilung von hautgeschwüren, verbrennungen und wunden beim menschen |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
AK | Designated states |
Kind code of ref document: A3 Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A3 Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
NENP | Non-entry into the national phase |
Ref country code: KR |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
122 | Ep: pct application non-entry in european phase | ||
NENP | Non-entry into the national phase |
Ref country code: CA |