EP1525301A2 - Procede de preparation d une matrice extracellulaire et son utilisation pour la culture de cellules tumorales - Google Patents
Procede de preparation d une matrice extracellulaire et son utilisation pour la culture de cellules tumoralesInfo
- Publication number
- EP1525301A2 EP1525301A2 EP03755644A EP03755644A EP1525301A2 EP 1525301 A2 EP1525301 A2 EP 1525301A2 EP 03755644 A EP03755644 A EP 03755644A EP 03755644 A EP03755644 A EP 03755644A EP 1525301 A2 EP1525301 A2 EP 1525301A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tumor
- cells
- tumor cells
- cell line
- mec
- 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- Withdrawn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
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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
- C12N5/0693—Tumour cells; Cancer cells
-
- 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
- C12N2502/00—Coculture with; Conditioned medium produced by
- C12N2502/30—Coculture with; Conditioned medium produced by tumour cells
-
- 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
-
- 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
- C12N2533/00—Supports or coatings for cell culture, characterised by material
- C12N2533/90—Substrates of biological origin, e.g. extracellular matrix, decellularised tissue
Definitions
- the subject of the present invention is a method for preparing an isolated extracellular matrix (ECM) secreted by tumor cells, in particular epitheliomatous cells, methods for culturing tumor cells using such a matrix, the use of such a matrix for the establishment of tumor cell line as well as new tumor cell lines obtained by this method.
- the invention also relates to a method of selecting compounds capable of inhibiting the growth and / or proliferation of tumor cells, the use of such compounds as a medicament for the treatment of cancer as well as a method of diagnosis or prognosis in in vitro by chromosome analysis using such matrices.
- the present invention also relates to a reactor or a kit for cell culture comprising such MEC.
- Solid tumors epitheliomatous in particular, are difficult to culture and, if necessary, to be propagated in vitro in the form of lines.
- a solid cancer tumor has, in addition to its malignant epithelial contingent (cancer cells sensu stricto), a contingent of stromal cells (fibroblasts, endothelial cells of tumor vessels) without which the malignant cells cannot develop in vivo.
- epithelia or support cells all tissues organize and polarize from a basal lamina made up of extracellular matrix (ECM), a set of integrins, proteoglycan, laminin proteins and growth factor receptors.
- ECM extracellular matrix
- the composition and structure of this MEC are specific to a given tissue.
- the supportive connective tissue is formed by fibroblasts, macrophages, mast cells, and endothelial cells of the vessels nourishing this supportive tissue.
- Such a connective tissue synthesizes a very abundant ECM allowing it to respond to tensions, essentially mechanical.
- reagents used to improve adhesion to a support for cancer cells mention may be made, for example, of certain proteins constituting an extracellular matrix secreted by the basal lamina of an epithelium, such as laminin, collagen IV, or even gelatin. , marketed by many commercial laboratories. These reagents are applicable as a monolayer on the plastic of culture flasks.
- Matrigel® base-like membrane
- Sigma USA
- Mention may also be made of the extracellular matrices originating from umbilical cord cells and marketed by certain University Academic Laboratories. Mention may also be made of fetal calf serum, containing growth and adhesion factors, used in the cell culture medium which promotes the adhesion of carcinomatous cells.
- these reagents promote the adhesion of cancer cells, these do not make it possible to stimulate their proliferation or to stimulate their proliferation in a constant manner, this in particular due to variations in manufacturing batches and thus in their quality.
- such reagents can be advantageously used not only for the culture of tumor cells but also for the establishment of tumor cell lines originating from primary tumor. Such cultures or lines could be a tool of choice for studying their biological properties (nucleic acid, protein, enzymatic activities), or even for carrying out tests predictive of sensitivity to tumor treatments (chemotherapy and radiotherapy). It would also be desirable to be able to have such reagents for a given type of cancer allowing the proliferation of tumor cells originating from a sample of a tumor from a patient. Indeed the proliferation of such tumor cells or the establishment of a cell line from such cells would allow the short-term in vitro study of the malignant cells of this patient and the sensitivity of these malignant cells to the treatment envisaged before its administration. to the patient.
- the inventors have surprisingly demonstrated that isolated extracellular matrices secreted by mammalian tumor cells, in particular epitheliomatous cells, make it possible to adhere and proliferate tumor cells, and allow the establishment of tumor cell line established from cells.
- tumors originating from a sample of a primary and / or metastatic tumor, this in particular when these tumor cells which one seeks to cultivate or whose one seeks to establish a cell line were obtained from a tissue of the same embryonic origin as tumor cells secreting said matrix.
- the subject of the present invention is a process for the preparation of an isolated extracellular matrix, secreted by tumor cells of animal origin, including humans, characterized in that it comprises the following stages: a) culturing said tumor cells of animal origin on a support under conditions allowing said tumor cells of animal origin to proliferate and secrete said MEC; and b) recovering the MEC thus formed free of said tumor cells.
- the method for preparing an isolated extracellular matrix according to the present invention is characterized in that it further comprises between said step a) and said step b) the following step:
- the method for preparing an isolated extracellular matrix according to the present invention is characterized in that said tumor cells of animal origin are epitheliomatous cells.
- the method for preparing an isolated extracellular matrix according to the present invention is characterized in that that said tumor cells are cells of a tumor cell line previously established from a primary tumor and / or from a metastatic proliferation.
- the invention relates to a method for preparing an isolated extracellular matrix according to the present invention, characterized in that said tumor cell line has been established from tumor and / or metastatic cells originating from a mammary tumor or ovarian.
- the invention relates to a method for preparing an isolated extracellular matrix according to the present invention, characterized in that said tumor cells are cells originating from a tumor of human origin.
- the invention relates to a process for the preparation of an isolated extracellular matrix according to the present invention, characterized in that said tumor cells are cells originating from the tumor cell line IGR-OV1 as deposited in the conditions of the Budapest Treaty at the National Collection of Culture of Microorganisms (CNCM), Institut Pasteur, Paris, (France) under number I-2893 on June 20, 2002.
- CNCM National Collection of Culture of Microorganisms
- the tumor cell line IGR-OV1 is a line of epitheloid cells derived from a primary tumor of human ovarian cancer. These cancer cells develop in monolayers and in floating “clusters” in the environment. These cellular “clusters” are able to adhere to plastic. Conversely, adherent cells can proliferate in floating “clusters” and it is the adherent contingent which is propagated (Bénard, J. et al., Cancer Research, 45, 4970-4979, 1985).
- the subject of the invention is an isolated extracellular matrix (ECM) capable of being obtained by a process for the preparation of an isolated extracellular matrix according to the present invention.
- ECM isolated extracellular matrix
- the MEC isolated according to the present invention is packaged in a fluid form, frozen, dried or lyophilized and, where appropriate, sterilized.
- the invention relates to a cell culture reactor containing an isolated ECM according to the present invention.
- the subject of the invention is a method for culturing tumor cells according to the present invention, characterized in that it comprises a step in which said tumor cells are brought into contact with an isolated MEC according to the present invention, said tumor cells which it is desired to cultivate being different from those from which said MEC was secreted.
- the subject of the invention is a method for preparing a tumor cell line established from tumor cells originating from a sample of a primary and / or metastatic tumor of animal origin, including Man, characterized in that said method implements a step in which the tumor cells contained in said tumor sample and from which it is sought to obtain an established line are brought into contact with an isolated ECM according to the present invention, said tumor cells which one seeks to obtain an established line being different from those from which said MEC was secreted.
- the method of culturing tumor cells according to the present invention or the method of preparing a tumor cell line according to the present invention is characterized in that the first tumor tissue from which the tumor cells are derived from from which said MEC was obtained and the second tumor tissue containing the tumor cells which one seeks to cultivate or which one seeks to establish a cell line are of the same animal species, including humans.
- the method for culturing tumor cells according to the present invention or the method for preparing a tumor cell line according to the present invention is characterized in that said first tumor tissue and said second tumor tissue are derived independently of each other from the group of malignant or benign tumors, in particular originating from ovarian, breast, prostate or thyroid tumors. More preferably, the method for culturing tumor cells according to the present invention or the method for preparing a tumor cell line according to the present invention is characterized in that said first tumor tissue is a tissue originating from a breast tumor, in particular from the tumor cell line IGR-OV1 and said second tumor tissue comes from malignant or benign tumors of the ovary, of the breast, of the prostate or of the thyroid.
- the method of culturing tumor cells according to the present invention or the method of preparing a tumor cell line according to the present invention is characterized in that said first tumor tissue and said second tumor tissue are of same embryonic origin.
- standard embryonic origin for a tumor tissue is meant in the present description tumor tissues derived from the same primitive embryonic tissues (endoderm, ectoderm or mesoderm).
- epitheliomatous ovarian and mammary tumors will be considered to derive from the same embryonic origin since epithelial ovarian and mammary tissues are derived from the endoderm.
- the method of culturing tumor cells according to the present invention or the method of preparing a tumor cell line according to the present invention is characterized in that said first tumor tissue and said second tumor tissue are d different embryonic origin, preferably derived from the endoderm and the ectoderm, or vice versa.
- the method of culturing tumor cells according to the present invention or the method of preparing a tumor cell line according to the present invention is characterized in that said first tumor tissue and said second tumor tissue are independently one of the other of mammary or ovarian type.
- the method for culturing tumor cells according to the present invention or the method for preparing a tumor cell line according to the present invention characterized in that said first tumor tissue is of ovarian type and said second tumor tissue is breast or ovarian.
- the subject of the invention is a method for culturing tumor cells according to the present invention or a method for preparing a tumor cell line according to the present invention, characterized in that said first tumor tissue and said second tumor tissue are of human origin.
- the subject of the invention is the use of an ECM isolated according to the present invention, as an element of a culture medium for the cell culture of tumor cells or for the establishment of a cell line of tumor cells originating from a primary tumor and / or from a metastatic proliferation, said tumor cells being different from those from which said MEC was secreted.
- the invention relates to an established tumor cell line obtained by a process for the preparation of a tumor cell line according to the present invention.
- the established tumor cell lines which can be obtained by a process for the preparation of a tumor cell line according to the present invention, very particularly preferred is the tumor cell line called IGR-OV-22-AS as deposited under the conditions of the treaty of Budapest at the CNCM under number 1-2894 on June 20, 2002 or the tumor cell line called IGR-BR-11- NS as deposited under the conditions of the Budapest Treaty at the CNCM under number I-2895 on June 20, 2002 .
- the tumor cell line called IGR-OV-22-AS was established from epitheliomatous cells contained in a carcinomatous peritoneal ascites sample of a human ovarian epithelial adenocarcinoma and on a genetic background predisposed to breast cancer syndrome and / or ovary, the ovarian epithelial cancer having developed in a patient constitutionally heterozygous for the BRCA2 gene (mutation of an allele of the gene). These epitheliomatous cancer cells develop in a monolayer. Human breast cancer, epitheliomatous cells from a nodule.
- the tumor cell line called IGR-BR-11-NS was newly established on the genetic background of predisposition to breast / ovarian cancer syndrome, in a heterozygous patient BRCA1 (mutated for an allele of the gene).
- epitheliomatous cancer cells also develop in monolayers.
- the subject of the invention is a method of selecting a compound capable of inhibiting the growth and / or proliferation of tumor cells, characterized in that it comprises the following steps: a) culturing said cells tumor cells comprising at least one culture step on an MEC isolated according to the present invention, said tumor cells being different from those from which said MEC was secreted; b) bringing said compound into contact with the tumor cells obtained in step a) under conditions normally allowing their growth and / or proliferation; and c) selecting said compound if the latter is capable of inhibiting the growth and / or proliferation of said tumor cells.
- the method for selecting a compound according to the present invention is characterized in that said MEC isolated in step a) is the MEC secreted by the tumor cell line IGR-OV1 as deposited in the CNCM under number 1-2893 on June 20, 2002.
- the invention relates to a method of selecting a compound capable of inhibiting the growth and / or proliferation of tumor cells, in particular tumor cells of an ovarian tumor, preferably human.
- tumor cells of the same embryonic origin as an ovarian cell characterized in that it comprises the following stages: a) bringing said compound into contact with a culture of cells derived from the tumor cell line IGR-OV-22 -AS as filed with the CNCM under number 1-2894 on June 20, 2002; and b) the selection of said compound if it is capable of inhibiting the growth and / or proliferation of said tumor cells.
- the invention relates to a method for selecting a compound capable of inhibiting the growth and / or proliferation of tumor cells, in particular tumor cells of a mammary tumor, preferably human, or of tumor cells of the same embryonic origin as a mammary cell, characterized in that it comprises the following stages: a) bringing said compound into contact with a culture of cells derived from the tumor cell line of human origin IGR-BR-11-NS as filed with the CNCM under number I-2895 on June 20, 2002; and b) the selection of said compound if it is capable of inhibiting the growth and / or proliferation of said tumor cells.
- the invention relates to a method of selecting a compound capable of inhibiting the growth and / or proliferation of tumor cells of a patient suffering from a tumor from a sample of tumor cells previously taken from said patient, characterized in that it comprises the following steps: a) the establishment of a tumor cell line from said tumor cells taken from the patient by a process for the preparation of a tumor cell line established by a method according to the present invention; b) bringing said compound into contact with a sample of the tumor cell line obtained in step a) under conditions normally allowing their growth and / or proliferation; and c) selecting said compound if it is capable of inhibiting the growth and / or proliferation of cells of the tumor cell line.
- the invention relates to the use of a compound for the preparation of a medicament intended for the treatment of cancer characterized in that said compound is selected by a selection process according to the present invention.
- the invention relates to the use of a compound according to the present invention, for the preparation of a medicament intended for the treatment of breast or ovarian cancer.
- the invention relates to a method of diagnosis or prognosis in vitro by chromosomal analysis, in particular by cytogenetics and interphasic FISH, of tumor cells previously removed from a patient, characterized in that it comprises a step in which said previously removed tumor cells which it is desired to test are cultured on an isolated MEC according to the present invention, said tumor cells being different from those from which said MEC was secreted.
- the method of diagnosis or prognosis in vitro by chromosomal analysis of tumor cells previously removed from a patient is characterized in that it comprises the following steps: a) establishment of a tumor cell line from said tumor cells by a method of preparing a tumor cell line established by a method according to the present invention; and b) chromosomal analysis of a sample of cells of said line obtained in step a) under conditions allowing their growth and / or their proliferation; and c) revealing a genetic alteration of one or more chromosomes by a technique making it possible to detect such alterations, in particular by karyotypic analysis or by the technique known as interphasic FISH.
- the genome of tumor cells is characterized by a set of genetic alterations: gain and / or loss of chromosomal regions.
- the cytogeneticist routinely reveals these alterations using in particular two techniques: karyotypic analysis and analysis by FISH (“Fluorescent In Situ Hybridization”), techniques well known to those skilled in the art, of which we Let us recall here that certain steps in order to note the importance of being able to have tumor cells having a proliferative capacity.
- FISH Fluorescent In Situ Hybridization
- the cells which have adhered to the plastic and which have started to proliferate will find themselves blocked in mitosis, thus revealing their chromosomes.
- the yield of mitoses under these conditions is very variable depending on the type of tumor and the proliferative capacity of the tumor tissue.
- the affixing of a tumor fragment on a cytological observation slide allows the deposition of malignant cells and, after fixation, an analysis by fluorescent hybridization in situ. This analysis does not require cells in mitosis but applies to all cells, the majority being in interphase, a small minority being in mitosis makes it possible to visualize the chromosomes.
- the epitheliomatous tumor cells in the presence of an extracellular matrix according to the invention in particular from the IGR-OV1 line, will adhere, differentiate and proliferate.
- the extracellular matrix of the invention provides the following improvements.
- the presence of the extracellular matrix according to the invention affixed to the slide allows increased adhesion of cancer cells.
- the tumor imprints made on the matrix will be richer in cells and will reduce the analysis time.
- the subject of the invention is a kit for the culture of tumor cells, in particular derived from mammary or ovarian tumor, or for the establishment of cell line derived from said tumor cells, comprising an ECM according to the invention.
- the present invention further relates to a solid support, in particular a glass slide, on which is affixed an extracellular matrix according to the present invention and its use for the chromosomal analysis of tumor cells.
- Example 1 Preparation of an extracellular matrix obtained from the IGR-OV1 line
- the IGR-OV1 cells (doubling time approximately 25 h) are cultured between passages 170 and 210 corresponding to approximately 500 generations, number of generations guaranteeing the stability of the line. Once the confluence is reached, the
- the culture medium surmounting the confluent cells is eliminated and replaced by PBS buffer (phosphate buffered saline) devoid of calcium and magnesium and preincubated at 37 ° C. This operation is repeated 3 times, it makes it possible to eliminate the proteins from the culture medium, the presence of which would alter the reproducibility of cell lysis.
- the volumes of the 3 successive buffers are as follows: - 1 ml per well of a 24-well plate,
- the same volume of 0.02 M NH4OH preheated to 37 ° C. is poured onto the walls of the flask before being applied to the confluent cells.
- the incubation is carried out in the CO2 incubator at 37 ° C for 6 minutes. If after this incubation time the lysis is not complete, it is continued in 30 second increments. When all the cell bodies have disappeared, the stop is then made by decantation of the ammonia solution which is very viscous (genomic DNA released by the cells).
- the washing of the matrix is carried out by the addition-decantation cycle 3 times with the same volume of PBS as the lysis volume. The first wash can still be viscous. Washes must be effective but gentle enough not to damage the matrix.
- the flasks and the culture plates containing the matrix are stored in heat-sealed bags in the ⁇ ⁇ of the culture volume of a PBS medium containing antibiotics, all at 4 ° C.
- the matrix thus prepared can be used between the
- the medium thus reconstituted is buffered with 10 mM final of HEPES.
- PBS PBS for “Phosphate Buffer Salts” without Gibco calcium or magnesium
- Matrix preservation medium PBS without calcium or magnesium Gibco in the presence of antibiotics and at the final concentration indicated above.
- Example 2 Obtaining two epitheliomatous lines: IGR-OV-22 and IGR-BR-11 A) Establishment of the epitheliomatous line IGR-OV-22
- Ovarian epithelium cancer develops in the form of a solid loco-regional ovarian tumor and peritoneal ascites containing epitheliomatous cells.
- the primary tumor (PT) and ascites (Asc) previously removed from a patient with a familial background of susceptibility to breast and / or ovarian cancer, a patient constitutionally heterozygous for the BRCA2 gene, were received by the laboratory. 'pathology. 1) Preparation of the tumor
- the cell suspension thus prepared is seeded in the 12 wells of a culture plate presenting the extracellular matrix secreted by the line IGR-OV1 previously prepared (matrix prepared for 17 days).
- 5 2 seeding density is important, about 3 x 10 cells / 4.5 cm.
- the cells were trypsinized using 0.025% trypsin-EDTA, taken up in RPMI 1640 medium - 10% fetal calf serum and reseeded on a matrix at the same initial seeding densities.
- the epitheliomatous cells are able to propagate directly on plastic.
- the tumor cells TP and Asc having undergone 20 passages, the sub-lines IGR-OV22-Asc and IGR-OV22-TP are considered to be established with a similar and typically epitheliomatous tumor phenotype.
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Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0209525 | 2002-07-26 | ||
| FR0209525A FR2842822B1 (fr) | 2002-07-26 | 2002-07-26 | Procede de preparation d'une matrice extracellulaire et son utilisation pour la culture de cellules tumorales |
| PCT/FR2003/002376 WO2004011596A2 (fr) | 2002-07-26 | 2003-07-28 | Procede de preparation d'une matrice extracellulaire et son utilisation pour la culture de cellules tumorales |
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| EP03755644A Withdrawn EP1525301A2 (fr) | 2002-07-26 | 2003-07-28 | Procede de preparation d une matrice extracellulaire et son utilisation pour la culture de cellules tumorales |
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| US (1) | US7476496B2 (fr) |
| EP (1) | EP1525301A2 (fr) |
| JP (1) | JP2005533512A (fr) |
| AU (1) | AU2003273484A1 (fr) |
| FR (1) | FR2842822B1 (fr) |
| WO (1) | WO2004011596A2 (fr) |
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| US8257715B1 (en) | 2004-08-26 | 2012-09-04 | University Of Notre Dame | Tissue vaccines and uses thereof |
| US20080160069A1 (en) * | 2005-04-12 | 2008-07-03 | The Board Of Trustees Of The University Of Illinois | Constricting Gel Assay and Therapeutic Patch |
| US8802113B2 (en) * | 2005-10-27 | 2014-08-12 | University Of Notre Dame | Extracellular matrix cancer vaccine adjuvant |
| US8778362B2 (en) * | 2005-10-27 | 2014-07-15 | University Of Notre Dame | Anti-tumor/cancer heterologous acellular collagenous preparations and uses thereof |
| US8778360B2 (en) * | 2005-10-27 | 2014-07-15 | University Of Notre Dame | Extracellular matrix cancer vaccine adjuvant |
| US9308252B2 (en) * | 2005-10-27 | 2016-04-12 | Cook Biotech, Inc. | Extracellular matrix materials as vaccine adjuvants for diseases associated with infectious pathogens or toxins |
| US9283266B2 (en) * | 2008-02-28 | 2016-03-15 | University Of Notre Dame | Metastasis inhibition preparations and methods |
| US8628572B2 (en) * | 2009-02-26 | 2014-01-14 | Wake Forest University Health Sciences | Corneal endothelial scaffolds and methods of use |
| US8846059B2 (en) | 2009-12-08 | 2014-09-30 | University Of Notre Dame | Extracellular matrix adjuvant and methods for prevention and/or inhibition of ovarian tumors and ovarian cancer |
| US20110150934A1 (en) * | 2009-12-18 | 2011-06-23 | University Of Notre Dame | Ovarian Tumor Tissue Cell Preparations/Vaccines for the Treatment/Inhibition of Ovarian Tumors and Ovarian Cancer |
| SG11201401183UA (en) * | 2011-10-04 | 2014-09-26 | Mitra Biotech Private Ltd | Ecm composition, tumor microenvironment platform and methods thereof |
| GB2555787A (en) | 2016-11-07 | 2018-05-16 | Landberg Goran | Diagnostic methods |
| WO2022098275A1 (fr) * | 2020-11-03 | 2022-05-12 | Iscaff Pharma Ab | Utilisations d'échafaudages dérivés de patients |
| CN113881627A (zh) * | 2021-10-21 | 2022-01-04 | 焕生汇生物基因技术(北京)有限公司 | 一种提高细胞外泌体产量的方法 |
| US20250034530A1 (en) * | 2021-12-06 | 2025-01-30 | Ohio State Innovation Foundation | Compositions and methods for production and use of a scalable human cell-derived extracellular matrix |
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| US6074874A (en) * | 1997-08-29 | 2000-06-13 | University Of Pittsburgh | Epithelial cell cultures for in vitro testing |
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| Publication number | Publication date |
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| JP2005533512A (ja) | 2005-11-10 |
| WO2004011596A2 (fr) | 2004-02-05 |
| FR2842822B1 (fr) | 2004-10-01 |
| US7476496B2 (en) | 2009-01-13 |
| AU2003273484A1 (en) | 2004-02-16 |
| FR2842822A1 (fr) | 2004-01-30 |
| AU2003273484A8 (en) | 2004-02-16 |
| US20060099675A1 (en) | 2006-05-11 |
| WO2004011596A3 (fr) | 2004-04-08 |
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