WO2013134378A1 - Defined media for expansion and maintenance of pluripotent stem cells - Google Patents
Defined media for expansion and maintenance of pluripotent stem cells Download PDFInfo
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Definitions
- the present invention is in the field of proliferation and maintenance of
- pluripotent stem cells under defined media conditions.
- feeder cells which provide sufficient factors to support attachment, proliferation and maintenance of pluripotency markers.
- Early methods for the generation and culture of human embryonic stem cells required the use of mouse embryonic fibroblast (MEF) feeder cells. Subsequent techniques included use of "conditioned media” and an extracellular matrix coating to replace feeder cells.
- MEF mouse embryonic fibroblast
- Conditioned media is media that has been modified by feeder cells, such as MEFs.
- feeder cells such as MEFs.
- both methods suffer from inconsistencies in batches of conditioned media or feeder cells to continually support expansion of pluripotent stem cells.
- both systems provide undefined factors that may work differently on different pluripotent stem cells. Accordingly, establishing a defined, cheap, reproducible culture media that supports continual expansion of pluripotent stem cells is of great interest in the regenerative medicine field.
- hES cells human embryonic stem cells
- KSR knock-out serum replacer
- BSA bovine serum albumin
- mTeSR® 1 media to eight components (Nature Methods, 2011, 8:424-424) highlighting that even in defined media there exists unnecessary agent(s) that may actually slow the proliferation of ES cells or reduce their pluripotency state.
- the refined mTeSR®l media consists of DMEM/F12 basal media supplemented with insulin, selenium, transferrin, ascorbic acid, FGF2 (bFGF), and TGFP or nodal, having the pH adjusted with NaHCO 3 .
- the present invention provides a defined cell culture formulation for the culture, maintenance, and expansion of pluripotent stem cells, wherein the defined cell culture formulation comprises basal medium, insulin, transferrin, selenium, fatty- acid free albumin, a TGF- ⁇ ligand, bFGF, and ascorbic acid; and wherein culturing stem cells in the defined cell culture formulation maintains the pluripotency and karyotypic stability of the stem cells for at least 10 passages.
- the cell culture formulation further comprises insulin growth factor 1 (IGF-1).
- the cell culture formulation comprises DMEM-F12.
- the invention provides a defined cell culture formulation for the culture, maintenance, and expansion of pluripotent stem cells, wherein the defined cell culture formulation comprises basal medium, insulin, transferrin, selenium, fatty- acid free albumin, a TGF- ⁇ ligand, bFGF, ascorbic acid, Trace Elements C, 4-(2- hydroxyethyl)-l-piperazine-ethanesulfonic acid, lithium chloride, glucose, Defined Lipids, and L-alanyl-L-glutamine dipeptide; and wherein culturing stem cells in the defined cell culture formulation maintains the pluripotency and karyotypic stability of the stem cells for at least 10 passages.
- the cell culture formulation comprises MCDB-131.
- ITS-X provides the insulin, transferrin, and selenium for the defined cell culture formulation of the invention. In some embodiments of the invention, the ITS-X is present from about 0.5% to about 2%. In some embodiments of the invention, the ITS-X is present at about 1%. In some embodiments of the invention, the fatty acid free albumin is reagent grade. In some embodiments of the invention, the reagent grade fatty acid-free BSA is present from about 0.2% to about 2.5%. In some embodiments of the invention, the reagent grade fatty acid-free BSA is present at about 2%.
- the TGF- ⁇ ligand in the defined cell culture formulation of the invention is TGF- ⁇ .
- the TGF- ⁇ is present from about 0.5 ng/ml to about 10 ng/ml.
- the TGF-B1 is present at about 1 ng/ml.
- the bFGF is present in the cell culture formulation from about 50 ng/ml to about 100 ng/ml. In some embodiments of the invention, the bFGF is present in the defined cell culture formulation at about 50 ng/ml. In some embodiments, the bFGF is present in the defined cell culture formulation at about 100 ng/ml.
- the insulin growth factor 1 is present from about 10 ng/ml to about 50 ng/ml. In some embodiments of the invention, the IGF-1 is present in the defined cell culture formulation at about 20 ng/ml.
- ascorbic acid is present in the defined cell culture formulation from about 0.2 mM to about 0.3 mM. In some aspects of the invention, ascorbic acid is present in the defined cell culture formulation at about 0.25 mM.
- the invention concerns a defined cell culture formulation consisting essentially of DMEM-F12 basal medium, ITS-X (to provide insulin, transferrin, and selenium), fatty-acid free albumin, a TGF- ⁇ ligand, bFGF, insulin growth factor 1 (IGF-1), and ascorbic acid.
- the invention relates to a defined cell culture formulation consisting essentially of MCDB-131, ITS-X (as a source of insulin, transferrin, and selenium), fatty-acid free albumin, a TGF- ⁇ ligand, bFGF, ascorbic acid, Trace Elements C, 4-(2-hydroxyethyl)-l-piperazine-ethanesulfonic acid, lithium chloride, glucose, Defined Lipids, and L-alanyl-L-glutamine dipeptide.
- the invention concerns a method for the expansion of human pluripotent stem cells, where the method comprises culturing the human pluripotent stem cells on a feeder-free matrix in a defined cell culture formulation; where the defined cell culture formulation comprises basal medium, insulin, transferrin, selenium, fatty-acid free albumin, a TGF- ⁇ ligand, bFGF, and ascorbic acid; and where culturing the stem cells in the defined cell culture formulation maintains the pluripotency and karyotypic stability of the cells for at least 10 passages.
- the defined cell culture formulation further comprises insulin growth factor 1 (IGF-1).
- the cell culture formulation comprises DMEM-F12.
- the invention relates to a method for the expansion of human pluripotent stem cells, where the method comprises culturing the human pluripotent stem cells on a feeder-free matrix in a defined cell culture formulation; where the defined cell culture formulation comprises basal medium, insulin, transferrin, selenium, fatty-acid free albumin, a TGF- ⁇ ligand, bFGF, ascorbic acid, IGF-1, Trace Elements C, 4-(2-hydroxyethyl)-l-piperazineethanesulfonic acid, lithium chloride, glucose, Defined Lipids, and L-alanyl-L-glutamine dipeptide.
- the cell culture formulation used in the method for the expansion of human pluripotent stem cells comprises MCDB-131.
- An embodiment of the present invention is an in vitro cell population wherein greater than 50% of the cell population is positive for protein expression of OCT4, SOX2, NANOG, FOXA2 with negative or low protein expression of SSEA-4 and ZFP42.
- the population is obtained by culturing pluripotent stem cells in a defined cell culture formulation comprising basal media supplemented with IGF-1, insulin, bFGF, TGF-B ligand, and fatty-acid free albumin; and where the defined cell culture formulation does not comprise ascorbic acid.
- the defined cell culture formulation comprises DMEM/F12 basal media. In some embodiments of the invention the cell culture formulation comprises insulin as ITS-X. In some embodiments of the invention, the ITS-X is present from about 0.5% to about 2%. In some aspects of the invention, the ITS-X is present at about 1%. In some
- the fatty acid free albumin is reagent grade. In some aspects of the invention, the reagent grade fatty acid-free albumin is present from about 0.2% to about 2.5%. In some embodiments of the invention, the reagent grade fatty acid-free albumin is present at about 2%.
- the TGF-B ligand is TGF-B 1. In some embodiments of the invention, the TGF-B 1 is present from about 0.5 ng/ml to about 10 ng/ml. In some aspects of the invention, the TGF-B 1 is present at about 1 ng/ml.
- Figure 1A to Figure ID show phase-contrast images of HI cells cultured for 3 passages in IH-3 (FIG 1A), IH-1 (FIG IB), IH-6 (FIG 1C), and mTeSR®l (FIG ID).
- Figure 2 A to Figure 2C show phase-contrast images of HI cells cultured for 10 passages in IH-3 (FIG 2A), IH-1 (FIG 2B), and mTeSR®l (FIG 2C) media.
- Figure 3 A to Figure 3C show phase-contrast images of HI cells cultured for 18 passages in IH-3 (FIG 3A), IH-1 (FIG 3B), and mTeSR®l (FIG 3C) media.
- Figure 4A to Figure 4F show data from real-time PCR analyses of the expression of the following genes in cells of the human embryonic stem cell line HI cultured in media described in Example 1 and harvested at passages 1 to 5 (P1-P5); ZFP42 (FIG 4A), SOX2 (FIG 4B), POU5F1 (OCT4) (FIG 4C), Nanog (FIG 4D), FOXA2 (FIG 4E), and AFP (FIG 4F).
- Figure 5A to Figure 5B show data from real-time PCR analyses of the expression of Nanog, POU5F1 (OCT4), SOX2, and ZFP42 (FIG 5A), and of AFP and FOXA2 (FIG 5B) in cells of the human embryonic stem cell line HI cultured in media described in Example 1 and harvested at Passage 10.
- Figure 6A and Figure 6B show data from real-time PCR analyses of the expression of ZFP42, SOX2, POU5F1 (OCT4), and Nanog (FIG 6A), and of AFP and FOXA2 (FIG 6B) in cells of the human embryonic stem cell line HI cultured in media described in Example 1 and harvested at Passage 18.
- Figure 7 A to Figure 7F show FACS histogram expression profiles of the following markers in cells cultured for 18 passages in IH-3 media described in Example 1 : Isotype control (FIG 7A); KI-67 (FIG 7B); OCT4 (FIG 7C); SOX17 (FIG 7D); FOXA2 (FIG 7E); and SOX2 (FIG 7F). Percentage expression for each marker is shown on each histogram.
- Figure 8 A to Figure 8F show images of cells cultured for 18 passages in IH-3 media described in Example 1 and immunostained for OCT-4, FOXA2, SOX2, and fluorescent labeling of DNA using DAPI. Images obtained for OCT4 (Fig 8A), FOXA2 (FIG 8B), and DAPI-stained DNA (FIG 8C) were obtained from the same optical field but with different filters. Similarly, images for SOX2 (FIG 8D), FOXA2 (FIG 8E), and DAPI stained DNA (FIG 8F) were obtained from the same optical field but with different filters
- Figure 9 A to Figure 9F depict phase-contrast images of HI cells cultured for five passages in mTeSR®! media (FIG 9A) and in IH-3 (FIG 9B), IH-3-1 (FIG 9C), IH-3-2 (FIG 9D), IH-3-3 (FIG 9E), and IH-3-4 (FIG 9F) formulations described in Example 2.
- Figure 10A to Figure 10E show data from real-time PCR analyses of the expression of the following genes in cells of the human embryonic stem cell line HI cultured in media described in Example 2 and harvested at Passage 5: ZFP42 (FIG 10A), SOX2 (FIG 10B), FOXA2 (FIG IOC), Nanog (FIG 10 D), and POU5F1 (OCT4) (FIG 10E).
- Figure 11A to Figure 1 ID depict phase-contrast images of HI cells cultured for 20 passages in mTeSR® 1 media (Fig 1A), IH-3 (FIG 1 IB), IH-1 (FIG 11C), and IH-3RT (FIG 1 ID) media formulations described in Example 3.
- Figure 12A to Figure 12F show data from real-time PCR analyses of the expression of the following genes in cells of the human embryonic stem cell line HI cultured for 15 passages in media described in Example 3: AFP (FIG 12 A), FOXA2 (FIG 12B), SOX2 (FIG 12C), Nanog (FIG 12D), POU5F1 (OCT4) (FIG 12E), and ZFP42 (FIG 12F).
- Figure 13A to Figure 13F show data from real-time PCR analyses of the expression of the following genes in cells of the human embryonic stem cell line HI cultured for 20 passages in mTeSR®l media, and IH-1 and IH-3 media described in Example 3: AFP FIG 13 A), FOXA2 (FIG 13B), NANOG (FIG 13C), POU5F1 (OCT4) (FIG 13D), SOX2 (FIG 13E), and ZFP42 (FIG 13F).
- Figure 14A and Figure 14B depict phase-contrast images of HI cells cultured for 4 days in media formulations described in Example 5 containing Sigma BSA (FIG 14A) or containing fatty acid free BSA (FIG 14B).
- Figure 15A and Figure 15B depict phase-contrast images of HI cells cultured for three passages in media formulations described in Example 5 containing Sigma BSA (FIG 15 A) or containing fatty acid free BSA (FIG 15B).
- Figure 16A to Figure 16C show data from real-time PCR analyses of the expression of the following genes in cells of the human embryonic stem cell line HI cultured for three passages in media formulations described in Example 5 containing Sigma BSA or fatty acid free BSA: AFP (FIG 16A), MIXL1 (FIG 16B), and T (BRY) (FIG 16C).
- Figure 17A to Figure 17D show data from real-time PCR analyses of the expression of the following genes in cells of the human embryonic stem cell line HI cultured for ten passages in media formulations described in Example 6: SOX2 (FIG 17A), POU5F1 (FIG 17B), NANOG (FIG 17C), and FOXA2 (FIG 17C).
- Figure 18A to Figure 18E depict phase-contrast images of HI cells cultured for 10 passages in IH-3 (FIG 18 A), IH-3P-2 (FIG 18B), IH-3P-3 (FIG 18C), IH-3P-4 (FIG 18D), and IH-3P-5 (FIG 18E) media formulations described in Example 6.
- Stem cells are undifferentiated cells defined by their ability at the single cell level to both self-renew and differentiate to produce progeny cells, including self-renewing progenitors, non-renewing progenitors, and terminally differentiated cells. Stem cells are also characterized by their ability to differentiate in vitro into functional cells of various cell lineages from multiple germ layers
- endoderm endoderm, mesoderm and ectoderm
- endoderm mesoderm and ectoderm
- Stem cells are classified by their developmental potential as: (1) totipotent, meaning able to give rise to all embryonic and extra-embryonic cell types; (2) pluripotent, meaning able to give rise to all embryonic cell types; (3) multipotent, meaning able to give rise to a subset of cell lineages but all within a particular tissue, organ, or physiological system (for example, hematopoietic stem cells (HSC) can produce progeny that include HSC (self- renewal), blood cell restricted oligopotent progenitors, and all cell types and elements (e.g., platelets) that are normal
- HSC hematopoietic stem cells
- oligopotent meaning able to give rise to a more restricted subset of cell lineages than multipotent stem cells
- unipotent meaning able to give rise to a single cell lineage (e.g., spermatogenic stem cells).
- a differentiated or differentiation- induced cell is one that has taken on a more specialized ("committed") position within the lineage of a cell.
- the term "committed”, when applied to the process of differentiation, refers to a cell that has proceeded in the differentiation pathway to a point where, under normal circumstances, it will continue to differentiate into a specific cell type or subset of cell types, and cannot, under normal circumstances, differentiate into a different cell type or revert to a less differentiated cell type.
- De- differentiation refers to the process by which a cell reverts to a less specialized (or committed) position within the lineage of a cell.
- the lineage of a cell defines the heredity of the cell, i.e., which cells it came from and what cells it can give rise to.
- the lineage of a cell places the cell within a hereditary scheme of development and differentiation.
- a lineage-specific marker refers to a characteristic specifically associated with the phenotype of cells of a lineage of interest and can be used to assess the differentiation of an uncommitted cell to the lineage of interest.
- Markers are nucleic acid or polypeptide molecules that are differentially expressed in a cell of interest.
- differential expression means an increased level for a positive marker and a decreased level for a negative marker.
- the detectable level of the marker nucleic acid or polypeptide is sufficiently higher or lower in the cells of interest compared to other cells, such that the cell of interest can be identified and distinguished from other cells using any of a variety of methods known in the art.
- Basal Medium refers to a solution of salts, nutrients, and vitamins that can support the growth of pluripotent stem cells in culture.
- Basal media may be selected among others from Dulbecco's modified Eagle's media (DMEM), MCDB media, RPMI.
- DMEM may also be DMEM/F12 (also referred to as DM-F12), or DMEM -high glucose (also referred to as DMEM-hg).
- MCDB media may be selected from any of the MCDB media available, and specifically MCDB-131.
- basal media may be selected by mixing the basl media formulations listed above in the appropriate ratio to allow for proliferation and maintenance of pluripotency of embryonic stem cells/
- the basal media in the defined cell culture formulation of the invention is DMEM-F12.
- the basal media in the cell culture formulation of the invention is MCDB-131.
- Feeer Cells refers to non-pluripotent stem cells on which pluripotent stem cells are plated.
- the feeder cells provide sufficient soluble and insoluble factors to support for attachment, proliferation, and maintenance of pluripotency markers by pluripotent stem cells.
- Constant Medium refers to a medium that is further supplemented with soluble factors derived from feeder cells.
- Extracellular Matrix or “Defined Matrix” or “Synthetic Matrix” refers to one or more substances that can provide for attachment, proliferation, and maintenance of pluripotency markers by pluripotent stem cells. Used interchangeably herein are “IGF” and “IGF-1” which stand for Insulin-like growth factor 1. In humans this protein is made by the liver and is responsible for much of what is attributed to the human growth hormone.
- FGF2 and bFGF are used interchangeably to identify the human basic fibroblast growth factor.
- TGF beta used interchangeably herein are "TGF beta”, “TGF-B”, and "TGF- ⁇ ".
- a TGF- ⁇ ligand may be selected from bone morphogenetic proteins (BMPs), growth and differentiation factor (GDFs), activins (Activin A, Activin AB, Activin B, Activin C), nodal and TGF-Ps.
- BMPs bone morphogenetic proteins
- GDFs growth and differentiation factor
- Activins Activin A, Activin AB, Activin B, Activin C
- nodal and TGF-Ps used interchangeably herein are "TGF beta”, “TGF-B”, and "TGF- ⁇ ”.
- a TGF- ⁇ ligand may be selected from bone morphogenetic proteins (BMPs), growth and differentiation factor (GDFs), activins (Activin A, Activin AB, Activin B, Activin C), nodal and TGF-Ps.
- a TGF- ⁇ may be selected
- Pluripotent stem cells may express one or more of the stage-specific embryonic antigens (SSEA) 3 and 4, and markers detectable using antibodies designated Tra-1-60 and Tra-1-81 (Thomson et al., Science 282: 1145, 1998).
- SSEA stage-specific embryonic antigens
- Undifferentiated pluripotent stem cells typically have alkaline phosphatase activity, which can be detected by fixing the cells with 4% paraformaldehyde, followed by developing with Vector Red as a substrate, as described by the manufacturer (Vector Laboratories, Burlingame CA). Undifferentiated pluripotent stem cells also typically express OCT4 and TERT, as detected by RT-PCR.
- pluripotent stem cells Another desirable phenotype of propagated pluripotent stem cells is a potential to differentiate into cells of all three germinal layers: endoderm, mesoderm, and ectoderm tissues. Pluripotency of stem cells can be confirmed, for example, by injecting cells into severe combined immunodeficient (SCID) mice, fixing the teratomas that form using 4% paraformaldehyde, and then examining them histologically for evidence of cell types from the three germ layers. Alternatively, pluripotency may be determined by the creation of embryoid bodies and assessing the embryoid bodies for the presence of markers associated with the three germinal layers.
- SCID severe combined immunodeficient
- Propagated pluripotent stem cell lines may be karyotyped using a standard G-banding technique and compared to published karyotypes of the corresponding primate species. It is desirable to obtain cells that have a "normal karyotype," which means that the cells are euploid, wherein all human chromosomes are present and not noticeably altered. Pluripotent cells may be readily expanded in culture using various feeder layers or by using matrix protein coated vessels. Alternatively, chemically defined surfaces in combination with defined media such as mTeSR®l media (StemCell Technologies, Vancouver, Canada) may be used for routine expansion of the cells.
- defined media such as mTeSR®l media (StemCell Technologies, Vancouver, Canada) may be used for routine expansion of the cells.
- Pluripotent cells may be readily removed from culture plates using enzymatic, mechanical or use of various calcium chelators such as EDTA (Ethylenediaminetetraacetic acid). Alternatively, pluripotent cells may be expanded in suspension in the absence of any matrix proteins or a feeder layer.
- EDTA Ethylenediaminetetraacetic acid
- pluripotent stem cells include established lines of pluripotent cells derived from tissue formed after gestation, including pre-embryonic tissue (such as, for example, a blastocyst), embryonic tissue, or fetal tissue taken any time during gestation, typically but not necessarily before approximately 10 to 12 weeks gestation.
- pre-embryonic tissue such as, for example, a blastocyst
- embryonic tissue or fetal tissue taken any time during gestation, typically but not necessarily before approximately 10 to 12 weeks gestation.
- Non- limiting examples are established lines of human embryonic stem cells or human embryonic germ cells, such as, for example the human embryonic stem cell lines HI, H7, and H9 (WiCell Research Institute, Madison, WI).
- compositions of this disclosure during the initial establishment or stabilization of such cells, in which case the source cells would be primary pluripotent cells taken directly from the source tissues.
- cells taken from a pluripotent stem cell population already cultured in the absence of feeder cells are also suitable.
- inducible pluripotent cells (IPS) or reprogrammed pluripotent cells that can be derived from adult somatic cells using forced expression of a number of pluripotent related transcription factors, such as OCT4, Nanog, Sox2, KLF4,and ZFP42 (Annu Rev Genomics Hum Genet, 2011, 12: 165-185).
- Human embryonic stem cells may be prepared as described by
- pluripotent stem cell markers include, for example, the expression of one or more of the following: ABCG2, cripto, FOXD3, CONNEXIN43, CONNEXIN45, OCT4, SOX2, NANOG, hTERT, UTF1, ZFP42, SSEA-3, SSEA-4, Tra 1-60, Tra 1- 81.
- Differentiation markers typically present in cultures of embryonic stem cells include for example, AFP, FOXA2, SOX17, T(BRY), and MIXL1.
- human pluripotent stem cells are cultured in a defined media comprising ascorbic acid, IGF, insulin, bFGF, TGF-B ligand, and fatty-acid free albumin to sustain proliferation of the pluripotent stem cells while maintaining pluripotency and karyotypic stability of the expanded cells for at least 10 passages.
- An embodiment of the present invention is an in vitro cell population wherein greater than 50% of the cell population is positive for protein expression of OCT4, SOX2, NANOG, and FOXA2 positive but low protein expression of SSEA-4 and ZFP42.
- Another aspect of the present invention describes an in vitro defined cell culture formulation comprising IGF, insulin, bFGF, TGF-B, fatty-acid free albumin, and no ascorbic acid that results in a cell population wherein greater than 50% of the cell population is positive by protein staining for OCT4, SOX2, NANOG, FOXA2 and low protein expression of SSEA-4 and ZFP42.
- 11905031 contains 100.0 ml/L ethyl alcohol (200 proof) and 2 mg/L Arachidonic Acid, 220 mg/L Cholesterol, 70 mg/L DL-alpha-Tocopherol Acetate, 0 mg/L Ethyl Alcohol 100%, 10 mg/L Linoleic Acid, 10 mg/L Linolenic Acid, 10 mg/L Myristic Acid, 10 mg/L Oleic Acid, 10 mg/L Palmitic Acid, 10 mg/L Palmitoleic Acid, 90000 mg/L Pluronic F-68, 10 mg/L Stearic Acid, and 2200 mg/L Tween 80® (ICI Americas, Inc. Bridgewater, NJ).
- IH-1 and IH-3 were further compared to the cells cultured in mTeSR®l media.
- samples were collected from IH-1, IH-3, and mTeSR® 1 cultures and evaluated by FACS, PCR, karyotype analysis (G- banding or FISH), and immune fluorescence staining.
- the results from FISH analysis are shown in Table II. These results show that HI cells cultured in IH-1 media or IH- 3 media showed normal karyotype, whereas cells cultured in mTeSR® 1 media displayed abnormal trisomy 12 at passage 10 and 18.
- IH-1 media passaged continuously in IH-1 media maintained characteristic ES colony morphology with very few differentiated cells surrounding the colonies. However, cells grown in IH-3 media started to lose the characteristic ES colony morphology beyond passage 10 (See FIG 1A, FIG 2A, and FIG 3 A).
- HI cells cultured in IH-3 media maintained strong expression of OCT4 and SOX2 markers at passage 1 1 (Table IV). This was despite a very low expression level of SSEA-4 for HI cells cultured in IH-3 media.
- m NA expression of core pluripotency markers such as Nanog (FIG 4D), OCT4 (FIG 4C), SOX2 (FIG 4B), and ZPF42 (FIG 4A) were maintained through passage 5 for HI cells cultured in IH-1, and IH-3 media to the same level as HI cells cultured in mTeSR®l .
- core pluripotency markers such as Nanog (FIG 4D), OCT4 (FIG 4C), SOX2 (FIG 4B), and ZPF42 (FIG 4A) were maintained through passage 5 for HI cells cultured in IH-1, and IH-3 media to the same level as HI cells cultured in mTeSR®l .
- ZFP42 ZFP42
- HI cells cultured for 14 passages in IH-3 were subsequently cultured in the above media formulations and compared to cells cultured in IH-3 media.
- HI cells cultured using various media formulations were assayed for pluripotency markers.
- Table VI following five additional passages, HI cells cultured in IH-3-2 (IH-3 supplemented with ascorbic acid) media recovered a small percentage of their SSEA-4 expression as compared to cells cultured in the other tested media.
- HI cells cultured in IH-3-2 media retained typical embryonic stem cell morphology similar to cells cultured in mTeSR® 1 (FIG 9A) media.
- HI cells cultured in IH-3, IH-3-1, IH-3-3, and IH-3-4 showed loose colony morphology (See FIG 9B, FIG 9C, and FIG 9F).
- PCR analysis of cells cultured in the above media formulations further confirmed that HI cells cultured in IH-3 -2 media regained some of the expression of ZFP42 and down regulated expression of FOXA2 (see FIG 10A to FIG 10E).
- passage 40 cultured on MATRIGELTM (1 :30 dilution) coated dishes in mTeSR® 1 media and passaged using EDTA, as described in Example 1 , were used as the starting population to evaluate long-term cultures using IH-1, IH-3-2 and mTeSR®l media. Cells were passaged as small colonies using 5-10 minute EDTA treatment at room temperature. The components of the tested media are listed in Table VII.
- HI cells cultured for 20 passages in IH-1, IH-3-2, and IH-3RT retained typical ES morphology.
- the results of PCR analysis of HI cells cultured for 15 passages in IH-1, IH-3-2, and IH-3RT are shown in FIG 12A to FIG 12F.
- the results of PCR analysis of HI cells cultured for 20 passages in IH-1, IH-3-2, and IH-3RT are shown in FIG 13A to FIG13F.
- HI cells cultured continuously in IH-1, IH-3-2, and IH-3RT showed normal karyotype as measured by G-banding and FISH analysis. However, HI cells cultured for 10 to 20 passages in mTeSR®l showed abnormal chromosomal counts (See Table IX).
- HI cells cultured in IH-1, IH-3-2 and mTeSR®l media were released by using TrypLE (Invitrogen) and seeded at a density of 5 X 10 5 cells per 10 cm MATRIGELTM -coated dishes.
- released cells were pretreated with 10 ⁇ Rock inhibitor (Sigma). Media was changed daily until three days post-seeding. On day 3, cells were released as single cells and counted using a hemocytometer. As shown in Table X, cells cultured in all three media formulations showed equivalent doubling times Table X
- Cells of the human embryonic stem cells line HI (passage 35 to passage 40), cultured on MATRIGELTM (1 :30 dilution) coated dishes in mTeSR® 1 media and passaged using EDTA, were used as the starting population to evaluate short-term cultures using IH-3-2 media supplemented with either 2% Sigma BSA (catalog No. A2153; Lot: 061M1804V) or fatty-acid free BSA (Proliant, Catalog No. 7500804; Lot: 11G54001). Cells were passaged as small colonies using 5-10 minute EDTA treatment at room temperature.
- Figure 14A and Figure 14B depict phase- contrast images of HI cells cultured for 4 days in media formulations containing Sigma BSA (FIG 14A) or fatty acid free BSA (FIG 14B).
- Figure 15A and Figure 15B depict phase-contrast images of HI cells cultured for three passages in media formulations containing Sigma BSA (FIG 15 A) or fatty acid free BSA (FIG 15B).
- FIG 14 A As seen in FIG 14 A, as early as day 4 following seeding, there was morphological evidence of differentiated cells in cultures using Sigma BSA. However, there was no gross differentiated cell morphology evident in cultures treated with fatty acid-free BSA (see FIG 14B)). The same trend was noted at passage 3, there was
- FIG 16A 16A
- MIXL1 FIG. 16B
- T BRY
- FIG 16C 16C
- PCR data at passage 3 clearly showed significant upregulation of markers associated with a differentiated cell for cells cultured in media comprising Sigma BSA. This data clearly demonstrates that use of fatty-acid-free BSA is critical in the maintenance of pluripotency, colony morphology, and proliferation of cells.
- Pluripotent Stem Cells can be Propagated and Maintain Pluripotency in IH-3 Media Using a Wide Range of Fatty Acid Free BSA and bFGF Concentrations
- passage 40 cultured on MATRIGELTM (1 :30 dilution) coated dishes in mTesr® 1 media and passaged using EDTA, were used as the starting population to evaluate short and long-term cultures using IH-3 media supplemented as indicated in Table XI.
- FIG 17A to Figure 17D show data from real-time PCR analyses of the expression of SOX2 (FIG 17A), POU5F1 (FIG 17B), NANOG (FIG 17C), and FOXA2 (FIG 17C) in cells of the human embryonic stem cell line HI cultured for ten passages in media
- FIG. 18A to Figure 18E depict phase-contrast images of HI cells cultured for 10 passages in IH-3-2 (FIG
- IH-3P-2 (FIG 18B), IH-3P-3 (FIG 18C), IH-3P-4 (FIG 18D), and IH-3P-5 (FIG 18E) media formulations listed in Table XI. As indicated in these figures, all formulations tested in this example allowed for formation of ES colonies with minimal evidence of gross differentiated morphology.
- HI cells cultured for ten passages in media formulations listed in Table XI retained normal counts for chromosome 12 and 17 as measured by FISH analysis.
- defined media consisting of DMEM/F12 basal media supplemented with ITS-X, reagent-grade fatty acid- free BSA, TGF-B1, IGF-1, and ascorbic acid allows for expansion of pluripotent cells while maintaining pluripotency of the cells when using a wide range of concentrations of fatty acid -free BSA and bFGF.
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AU2013230020A AU2013230020B2 (en) | 2012-03-07 | 2013-03-06 | Defined media for expansion and maintenance of pluripotent stem cells |
RU2014140371A RU2664467C2 (en) | 2012-03-07 | 2013-03-06 | Medium with defined composition for propagation and renewal of pluripotent stem cells |
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CA2866590A CA2866590A1 (en) | 2012-03-07 | 2013-03-06 | Defined media for expansion and maintenance of pluripotent stem cells |
CN201380012670.9A CN104160018A (en) | 2012-03-07 | 2013-03-06 | Defined media for expansion and maintenance of pluripotent stem cells |
JP2014561075A JP6383292B2 (en) | 2012-03-07 | 2013-03-06 | Clear media for proliferation and maintenance of pluripotent stem cells |
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Also Published As
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MX2014010782A (en) | 2014-10-14 |
HK1206058A1 (en) | 2015-12-31 |
KR20140131999A (en) | 2014-11-14 |
RU2018128383A (en) | 2019-03-14 |
RU2664467C2 (en) | 2018-08-17 |
AU2013230020A1 (en) | 2014-09-04 |
EP2823037A1 (en) | 2015-01-14 |
SG11201405052RA (en) | 2014-10-30 |
ZA201407241B (en) | 2016-05-25 |
US9434920B2 (en) | 2016-09-06 |
RU2014140371A (en) | 2016-04-27 |
IN2014DN07036A (en) | 2015-04-10 |
US9593307B2 (en) | 2017-03-14 |
EP2823037A4 (en) | 2015-09-16 |
CA2866590A1 (en) | 2013-09-12 |
AU2018260810A1 (en) | 2018-11-22 |
RU2018128383A3 (en) | 2019-04-15 |
AR090276A1 (en) | 2014-10-29 |
US20160251615A1 (en) | 2016-09-01 |
MX354775B (en) | 2018-03-20 |
JP6383292B2 (en) | 2018-08-29 |
AU2013230020B2 (en) | 2018-08-09 |
US20130236973A1 (en) | 2013-09-12 |
JP2015509381A (en) | 2015-03-30 |
PH12014501898A1 (en) | 2014-11-24 |
US20170183626A1 (en) | 2017-06-29 |
CN104160018A (en) | 2014-11-19 |
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