KR20150051122A - Method for differentiating glial progenitor cell, astrocyte and oligodendrocyte from embryonic stem cell - Google Patents

Abstract

The present invention relates to a method of inducing embryonic stem cells to differentiate the same into glial progenitor cells, astrocytes, and oligodendrocytes. According to an embodiment of the present invention, the method comprises the steps of: 1) culturing embryonic stem cells to form an embryoid body; 2) separating the embryoid body into a single cell and culturing the separated single cell to induce a generation of neural stem cells; and 3) additionally culturing the neural stem cells, separating the cultured neural stem cells into a single cell, and subculturing the separated neural stem cells 5 to 40 times. When using the method according to the present invention, it is possible to continuously culture obtained glial progenitor cells and induce the glial progenitor cells to differentiate into astrocytes, and oligodendrocytes, thereby being effectively used for screening of toxic materials related to the cells and assessing toxicity.

Description

[0001] The present invention relates to a method for differentiating glial progenitor cells from astrocyte and oligodendrocytes to embryonic stem cells,

The present invention relates to a method of differentiating embryonic stem cells into glial progenitor cells, astrocytes, and rarely proliferating glial cells.

A stem cell is a cell capable of differentiating organisms constituting a biological tissue into various cells, collectively referred to as undifferentiated cells at different stages before differentiation, which can be obtained from each tissue of the embryo, fetus and adult body. Stem cells are differentiated into specific cells by differentiation stimuli (environment), and unlike the differentiated cells in which cell division is stopped, they can self-renew themselves by cell division, ; expansion, and it can be differentiated into other cells by different environments or differentiation stimuli, and is characterized by plasticity in differentiation.

Stem cells are largely derived from pluripotency embryonic stem cells (ES cells) obtained from embryos and totipotent to differentiate into all cells and multipotent stem cells obtained from each tissue ) Adult stem cells are divided into. The inner cell mass of the blastocyte in the early stage of embryogenesis is the part of the embryo that will form the embryo in the future. The embryonic stem cells formed from the inner cell of the embryo can theoretically be differentiated into cells of all the tissues constituting the individual It is a stem cell with potential. In other words, embryonic stem cells are undifferentiated cells capable of proliferating indefinitely, and can differentiate into all cells. Unlike adult stem cells, embryonic stem cells can also be created and inherited to the next generation. In contrast, when embryonic development proceeds and each tissue is introduced during its formation, the tissue-specific stem cells (stem cells) are present in each tissue, . In this way, tissue-specific stem cells are generally limited to multipotent or unipotent cells that are capable of differentiating, and even after becoming adult, most of the tissues contain stem cells specific for each tissue And will compensate for the loss of normal or pathologically occurring cells.

 Therefore, the method of differentiating embryonic stem cells into glial progenitor cells, astrocytes and rare proliferative glia cells can be used in various studies, and thus, the importance thereof is very high. The inventors of the present invention have developed a method of establishing a glial progenitor cell capable of continuous culture Thereby completing the present invention.

The present invention provides a method of differentiating embryonic stem cells into glial progenitor cells, astrocytes, and rare prominent glial cells.

In order to solve the above problems,

1) culturing embryonic stem cells to form an amphibian;

2) separating the somata of step 1) into single cells, and then culturing the isolated single cells to induce the production of neural progenitor cells;

3) further culturing the neural progenitor cells of step 2), separating the cells into single cells, and culturing them 5 to 40 times in a subculture, to provide a method of differentiating embryonic stem cells into neural precursor cells.

The present invention also provides a glial progenitor cell differentiated by the above method.

The present invention also encompasses culturing the glial progenitor cells for 8 to 12 days in DMEM medium containing fetal bovine serum (FBS), glutamax-1 additive and N2 To provide a method of differentiating from glial precursor cells into astrocytes.

The present invention also relates to a method for the prophylactic and / or therapeutic treatment of glial leukocyte from glial progenitor cells, comprising culturing said glial progenitor cells in a neurobasal medium comprising T3, glutamex-1 additive and B27 for 8 to 12 days Thereby providing a method of differentiating into cells.

When the method of differentiating embryonic stem cells into glial progenitor cells, astrocytes and rare proliferative glia cells according to the present invention is used, it is possible to continuously cultivate the obtained glial progenitor cells, and the glial progenitor cells can be stellate cells and rare prominent glue It is possible to differentiate into a cell, and thus it can be usefully used for screening and evaluating toxicity of a related toxic substance.

1 is a diagram schematically illustrating the induction process of differentiation from mouse embryonic stem cells into progenitor precursor cells.
FIG. 2 is a diagram showing the result of immunochemical analysis and microscopic observation (marker: green, nuclear dye: blue) for confirming the expression pattern of neural-specific markers of neural stem cells.
FIG. 3 is a graph showing the result of immunochemical analysis and microscopic observation to confirm the viability and morphological characteristics of progenitor precursor cells.
FIG. 4 is a graph showing the result of immunochemical analysis and microscopic observation (immunofluorescence, olig2: green, nuclear staining: blue) for confirming the specific olig2 expression pattern of the glial progenitor cells.
FIG. 5 shows the results of LIF-dependent cell proliferation of progenitor precursor cells. FIG.
FIG. 6 is a graph showing the results of immunochemical analysis of the progenitor precursor cells according to the passage number and observation with a microscope. FIG.
FIG. 7 is a graph showing the results of comparison of changes in the glial progenitor cells according to the passage using RT-PCR.
FIG. 8 is a graph showing the results of confirming the differentiation index gene changes according to the differentiation from the glial progenitor cells into the astrocytes by RT-PCR.
FIG. 9 is a graph showing the results of confirmation of the differentiation index gene changes by differentiation from glial progenitor cells to rare proliferative glia cells by RT-PCR.

According to the present invention,

1) culturing embryonic stem cells to form an amphibian;

2) separating the somata of step 1) into single cells, and then culturing the isolated single cells to induce the production of neural stem cells;

3) further culturing the neural stem cells of step 2), separating the cells into single cells, and culturing them 5- to 40-times subculture, to provide a method of differentiating embryonic stem cells into glial progenitor cells.

The present invention also provides a glial progenitor cell differentiated by the above method.

The embryonic stem cells are derived from one or more selected from the group consisting of human, monkey, pig, horse, cattle, sheep, dog, cat, mouse and rabbit, but are not limited thereto.

The method of differentiating embryonic stem cells into progenitor precursor cells according to the present invention will be described step by step.

In step 1), embryonic stem cells are cultured in a fetal calf serum, 2-mercaptoethanol, L-glutamine, non-essential amino acids, penicillin , Streptomycin, and retinoic acid for 4 to 7 days in DMEM (Dulbeco's modified eagle's medium).

The step 2) is a step of inducing the production of neural stem cells from the supernatant. After separating the supernatant obtained in the step 1) into single cells, the isolated single cells are cultured in DMEM / F12 medium supplemented with N2 B27 medium supplemented with B27 (neurobasal medium supplemented with B27) for 5 to 9 days to induce the production of neural stem cells.

In the step 3), neural stem cells are further cultured and then separated into single cells and cultured 5 to 40 times to obtain glial progenitor cells. The subculture is preferably performed 29 times. The additional culture is incubated for 5-9 days and then separated into single cells. The additional culture may be carried out one to three times. The subculture is preferably cultured in N2 / B27 medium containing FGF-2 (Fibroblast growth factor), EGF (Epidermal growth factor) and LIF (leukemia inhibitory factor).

The present invention also relates to a method for the prophylactic and / or therapeutic treatment of glial precursor cells, comprising culturing said glial progenitor cells in a DMEM medium containing fetal bovine serum (FBS), glutamax-1 additive and N2 for 8 to 12 days To an astrocyte.

The expression of glial fibrillary acidic protein (GFAP), galactocerebrosidase (GFAP) and olig2 (oligodendrocyte lineage transcription factor 2) is increased and the expression of Tuj1 (neuronal class III beta tubulin) is decreased in the astrocytes as compared with the glial progenitor cells.

The present invention also relates to a method for producing glial progenitor cells from glial progenitor cells, comprising culturing said glial progenitor cells in a neurobasal medium comprising T3, glutamex-1 additive and B27 for 8 to 12 days Thereby providing a method of differentiating into cells.

The rare prominent glial cells have increased expression of GFAP, galC and olig2, and decreased expression of Tuj1.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined by the appended claims. It will be obvious to you.

Example 1 Induction of Differentiation from Mouse Embryonic Stem Cells into Neural Progenitor Cells

The process of inducing differentiation from mouse embryonic stem cells into progenitor precursor cells is briefly shown in Fig.

Example 1-1. Formation of body

Mouse embryonic stem cells were cultured in a differentiating medium to induce differentiation into somata.

More particularly, the mouse embryonic stem cells (NVRQS 11F) to 2 × 10 compensation of ^four / ml of body (embryoid body, EB) into the differentiation medium 5-6 days 37 ℃, which is 5% to keep CO ₂ for Lt; / RTI > The repertoire differentiation medium was prepared by adding 20% fetal calf serum, 0.1 mM 2-mercaptoethanol, 2 mM L-glutamine, 0.1 mM MEM nonessential amino acid, , EmbryoMax nucleosides, and 50 U / ml penicillin / streptomycin, and 10 ^-8 M retinoic acid was added.

Examples 1-2. Induction of differentiation from neurons into neural stem cells

The specimens differentiated in Example 1-1 were separated into single cells (single cell dissociation) and further cultured in neural stem cell-derived differentiation medium for 7 days to induce differentiation into neural stem cells. The neural stem cell-derived differentiation medium contained 50% of DMEM / F12-based medium supplemented with N2 (Gibco 17502-048) and 50% of neurobasal medium supplemented with B27 supplemented with B27 (Gibco 17504-044) N2 / B27 medium. The neural stem cells were inoculated into the neural stem cell-derived differentiation medium and cultured in an incubator maintained at 37 ° C and 5% CO ₂ to obtain neural stem cells.

Examples 1-3. Immunochemical analysis of neural stem cells

In order to confirm whether the neural stem cells obtained in Example 1-2 were properly differentiated, immunochemical analysis was carried out. At this time, the neural stem cells were induced with differentiation medium for 5-6 days in the medium of Example 1-1, separated into single cells, differentiated again for 7 days, and used for neural stem cells cultured for 12 to 13 days in total.

More specifically, the culture broth was removed and neural stem cells were washed with PBS buffer and fixed in 4% paraformaldehyde for 25 minutes. This was washed with a rinse buffer (Tris buffer with 0.04% tween 20), permeabilized with 0.1% Triton-X-100 / PBS, washed with washing buffer Lt; / RTI > After reacting with blocking buffer containing 4% normal goat serum for 30 minutes at room temperature, the primary antibody shown in Table 1 was reacted at room temperature for 1 hour. After washing three times with washing buffer, the secondary antibody shown in Table 1 was reacted at room temperature for 1 hour, washed three times with washing buffer, and stained with 1: 10000 using a staining reagent (Hoechst 33342, Invitrogen). The staining was confirmed with a fluorescence microscope (Axiovert 200M, Carl Zeiss), and photographs were taken and observed. The results are shown in Fig.

Antibody Antibody name Origin The Primary antibody Anti-GFAP rabbit poly igG abcam Anti-Olig2 rabbit poly igG abcam Anti-Nestin rabbit poly igG abcam Anti-Choline Acetyltransferase goat poly igG abcam Anti-script 1 rabbit poly igG abcam Anti-HB9 / HLX9 sheep poly igG abcam Anti-Tyrosine Hydroxylases (TH) rabbit poly millipore - Musashi rabbit mono igG millipore Anti-PCNA mouse mono igG2a abcam Anti-Sox2 rabbit poly millipore Anti-Oct4 mouse mono igG1 millipore Anti-β-Ⅲ Tubulin (Tuj1) mouse mono igG2a R & D system Secondary antibody

Anti-Rabbit IgG-H & L (TRITC) Chicken polyclonal abcam Anti-Mouse IgG H & L (TRITC) Goat polyclonal abcam Anti-Rabbit IgG-H & L (FITC) Goat polyclonal abcam

Nestin and musashi as neural stem cell markers and Tuj1 (neuronal class III tubulin) as neuronal markers were used as markers indicating pluripotency of embryonic stem cells, HB9 and Islet1 as cholinergic neuron markers, TH as a dopaminergic neuron marker, PCNA (proliferating cell nuclear antigen) as a proliferating cell marker, and olig2 (oligodendrocyte lineage transcription factor 2) as a glial cell marker, And glial fibrillary acidic protein (GFAP) as an astrocytic marker.

As shown in FIG. 2, the neural stem cell markers nestin, Musashi, and Sox2 are strongly expressed, and the expression of oct4, an embryonic stem cell marker, is different depending on the cells to be separated, and the differentiation into neural stem cells .

Examples 1-4. Further cultivation of neural stem cells

The neural progenitor cells obtained in Example 1-2 were transferred one by one to a cell culture flask and further cultured in an incubator maintained at 37 ° C and 5% CO ₂ for 7 days. The culturing process was repeated twice, and then the cells were separated into single cells, cultured, and the glial progenitor cells were cultured.

More specifically, the specimens differentiated in Example 1-1 were separated into single cells and cultured for 7 days to form colonies containing many neural stem cells. When the colonies were cultured and removed It is differentiated into neuronal progenitor cells in neural stem cells and then differentiated into neuronal progenitor cells and glial progenitor cells that differentiate into neurons. In order to obtain the glial precursor cells, the colonies were transferred to another culture plate and cultured for 2 additional times by further culturing for 7 days.

In addition, when cells growing in monolayer grew to 60-70% of the culture plate, cells were detached with accutase or trypsin / EDTA and further cultured again at the appropriate cell concentration on the culture plate.

As a result, it was confirmed that the cells proliferated into monolayer adherent cells. In addition, it was observed that the same characteristics were maintained up to the fourth passage by continuous culturing, and it was confirmed that subculture of the glial progenitor cells was possible.

Example 2: Subculture of glial precursor cells and characterization

Example 2-1. Subculture and immunochemical analysis of glial precursor cells

The glial progenitor cells established in Example 1 were continuously subcultured to perform immunochemical analysis in order to confirm the possibility of continuous subculture, morphological characteristics change, and differentiation into progenitor precursor cells.

In detail, the glial progenitor cells established in Example 1 were incubated with N2 / B27, 20 ng / ml FGF-2 (Fibroblast growth factor), 20 ng / ml EGF (Epidermal growth factor) and 1% LIF (Leukemia inhibitory factor) , And cultured in an incubator maintained at 37 ° C and 5% CO ₂ . The medium was subcultured by suspending cells with 0.25% trypsin-EDTA (Gibco) every 2 days.

In order to confirm the characteristics of the established glial progenitor cells and morphological changes after the passage, the neural progenitor cells cultured in the second passage were subjected to immunochemical analysis in the same manner as in Example 1-3. Anti-Ot4, anti-Sox2, anti-nestin, anti-Musashi and anti-olig2 were used as primary antibodies and stained in green. The secondary antibody was used as described in Table 1 above . Nuclei were stained blue using a staining reagent (hoechst33342), and staining was confirmed by fluorescence microscopy. The results are shown in Figs. 3 and 4. Fig.

As shown in FIG. 3, nestin and musculus, which are neural stem cell markers, were markedly expressed, and it was confirmed that Oct4, an embryonic stem cell marker, was less expressed.

In addition, as shown in Fig. 4, it was confirmed that olig2, a marker of oligodendrocyte, was remarkably expressed in glial progenitor cells.

Thus, it was confirmed that the glial progenitor cells of the present invention are cell lines capable of continuous subculture and differentiated into progenitor precursor cells.

Example 2-2. Identification of LIF Growth Factor Dependence in Neural Progenitor Cells

In order to confirm the dependence of LIF (Leukemia inhibitory factor) growth factor on the proliferation of the glial progenitor cells of Example 2-1, the glial progenitor cells were divided into a group to which 1% of LIF growth factor was added or a group to which no LIF growth factor was added . The results are shown in Fig.

As shown in FIG. 5, it was confirmed that the adhesion of cells was significantly decreased from day 4 after culturing in the group cultured by removing the LIF growth factor, and died.

Example 3 Confirmation of the glial lineage pattern according to the passage of glial progenitor cells

Example 3-1. Immunochemical analysis of neuroblastoma cells according to number of passages

Immunohistochemical analysis was performed using the subculture method of Example 2-1 to confirm the expression and change of the differentiation index protein marker according to the passage of the glial progenitor cells.

Anti-nestin, anti-Muscle, anti-Sox2 and anti-Ot4 were used as the primary antibodies and the secondary antibodies were anti-mouse and rabbit IgG FITC, and TRITC were used. The results are shown in Fig. The first row shows 17 passages, the second row has 20 passages, the third row has 23 passages, the fourth row has 26 passages, and the fifth row has 29 passages.

As shown in FIG. 6, it was confirmed that the expression of Oct4, an embryonic stem cell marker, was weak from 20th passage and nestin precursor cell markers nestin and musashi were remarkably expressed. In addition, it was confirmed that it is a progenitor precursor cell expressing the glial progenitor cell marker stably up to the 29th passage.

Example 3-2. Gene expression by RT-PCR in neuronal precursor cell line And change confirmation

Using the subculture method of Example 2-1, RT-PCR was performed to confirm expression and change of differentiation index protein markers according to the passage of glial progenitor cells.

More specifically, in order to confirm the expression of the glial progenitor cell gene, 2-step RT-PCR was performed using 500 ng of the total RNA isolated from cells in each passage as a template. Reverse transcription was performed using Accupower cycleScript RT premix kit (bioneer) and real-time PCR was performed using iQ SYBR Green supermix (Biorad). The nucleotide sequence of the primer set used in the PCR reaction was as follows: primer represented by SEQ ID NO: 1 and SEQ ID NO: 2 for oct4 gene amplification; primer represented by SEQ ID NO: 3 and SEQ ID NO: 4 for sox2 gene amplification; 7 and SEQ ID NO: 8 in the case of the Musashi gene amplification and SEQ ID NO: 9 and SEQ ID NO: 10 in the case of the TB3 (Tuj1) gene amplification, respectively; The primers represented by SEQ. ID. NO. 11 and SEQ ID NO. 12 for GFAP gene amplification and the primers represented by SEQ ID NO. 15 and SEQ ID NO. 16 for olig2 gene amplification were used. The nucleotide sequence of the primer set used in the reaction is shown in Table 2 below. PCR was performed using an iCycler thermal cycler (Biorad). The PCR reaction conditions were denaturation at 95 ° C for 3 minutes, followed by PCR at 95 ° C for 10 seconds, 60 ° C for 10 seconds, and 72 ° C for 20 seconds. And the polymerization reaction was carried out at 95 DEG C for 1 minute. And compared with the expression of? -Actin as a control, and the results are shown in Fig.

Gene name gene
direction Base sequence SEQ ID NO: oct4 Forward 5'-GAGAAGAGTATGAGGCT-3 ' SEQ ID NO: 1 Backward 5'-GAAGCCGACAACAATGA-3 ' SEQ ID NO: 2 sox2 Forward 5'-AAGGGTTCTTGCTGGGTTTT-3 ' SEQ ID NO: 3 Backward 5'-AGACCACGAAAACGGTCTTG-3 ' SEQ ID NO: 4 Nestin Forward 5'-CCAGAGCTGGACTGGAACTC-3 ' SEQ ID NO: 5 Backward 5'-ACCTGCCTCTTTTGGTTCCT-3 ' SEQ ID NO: 6 Musashi Forward 5'-TAGTTCGAGGGACAGGCTCT-3 ' SEQ ID NO: 7 Backward 5'-GTTGAGGGACAGGCAGTAGC-3 ' SEQ ID NO: 8 TB3 (TuJ1) Forward 5'-GCCTTTGGACACCTATTCA-3 ' SEQ ID NO: 9 Backward 5'-AGTCACAATTCTCACACTCTT-3 ' SEQ ID NO: 10 GFAP Forward 5'-CTCCAAGATGAAACCAACCT-3 ' SEQ ID NO: 11 Backward 5'-CTCCTCCTCCAGCGATTC-3 ' SEQ ID NO: 12 Galc Forward 5'-CCAACCAACTACAAGGATGAT-3 ' SEQ ID NO: 13 Backward 5'-CAAACACGCCAGTCTGAT-3 ' SEQ ID NO: 14 olig2 Forward 5'-CTGCTGGCGCGAAACTACAT-3 ' SEQ ID NO: 15 Backward 5'-CGCTCACCAGTCGCTTCAT-3 ' SEQ ID NO: 16

As shown in FIG. 7, it was confirmed that Oct4, an embryonic stem cell marker, was abruptly decreased after passage 20, and neural progenitor cell markers nestin and musashi were slightly increased compared to embryonic stem cells . In addition, it was confirmed that the neuronal marker TB3, the astrocytic marker GFAP, and the oligodendroglial marker Olig2 exhibited remarkably high expression rates. In addition, the selected cells after passage 20 were identified as progenitor cells close to the glial cells, that is, progenitor precursor cells.

Example 4. Confirmation of the differentiation potential of the glial progenitor cells into the glial cell line

Example 4-1. Differentiation into astrocytes

The glial progenitor cells established in Example 2 DMEM medium, glutamex-1 adduct, N2 adduct and FBS were added to the plate coated with poly-L-ornithine to induce differentiation for 10 days and RT-PCR was performed as in Example 3 above. The base sequence of the primer set used in the PCR reaction was as follows: the primers represented by SEQ ID NO: 5 and SEQ ID NO: 6 for nestin gene amplification; the primers represented by SEQ ID NO: 9 and SEQ ID NO: 10 for TB3 gene amplification; 13 and SEQ ID NO: 14 for Galc gene amplification, and primers represented by SEQ ID NO: 15 and SEQ ID NO: 16 for olig2 gene amplification, Respectively. The nucleotide sequence of the primer set used in the reaction is shown in Table 2 above. The results are shown in Fig.

As shown in FIG. 8, when the cells were differentiated into astrocytes, the expression of TB3 (Tuj1), a neuronal cell marker, was decreased and the expression of nestin, a neural progenitor cell marker, was slightly increased , And the expression of GFAP, galC and olig2, which are markers of the glial cell lineage, were significantly increased.

Example 4-2. Differentiation into rare prominent glue cells

The glial progenitor cells established in Example 2 were inoculated into poly-L-ornithine / laminin-coated plates for 10 days by adding nerobasal medium, glutamex-1 additive, B27 additive and T3 And RT-PCR was carried out under the same conditions as in Example 3 above. The base sequence of the primer set used in the PCR reaction was as follows: the primers represented by SEQ ID NO: 5 and SEQ ID NO: 6 for nestin gene amplification; the primers represented by SEQ ID NO: 9 and SEQ ID NO: 10 for TB3 gene amplification; 13 and SEQ ID NO: 14 for Galc gene amplification, and primers represented by SEQ ID NO: 15 and SEQ ID NO: 16 for olig2 gene amplification, Respectively. The nucleotide sequence of the primer set used in the reaction is shown in Table 2 above. The results are shown in Fig.

As shown in Fig. 9, it was confirmed that the expression of nerve cell marker TB3 (Tuj1) was decreased when differentiated into spindle-shaped glial cells, and the expression of nestin, a neural progenitor cell marker, Expression of GFAP, galC and olig2 was significantly increased.

<110> Animal and plant quaratine agency <120> Method for differentiating glial progenitor cell, astrocyte and          자막 <130> 1.49-1P <150> KR 10-2013-0131627 <151> 2013-10-31 <160> 16 <170> Kopatentin 2.0 <210> 1 <211> 17 <212> DNA <213> Artificial Sequence <220> <223> Forward primer of oct4 <400> 1 gagaagagta tgaggct 17 <210> 2 <211> 17 <212> DNA <213> Artificial Sequence <220> <223> Backward primer of oct4 <400> 2 gaagccgaca acaatga 17 <210> 3 <211> 20 <212> DNA <213> Artificial Sequence <220> <223> Forward primer of sox2 <400> 3 aagggttctt gctgggtttt 20 <210> 4 <211> 20 <212> DNA <213> Artificial Sequence <220> <223> Backward primer of sox2 <400> 4 agaccacgaa aacggtcttg 20 <210> 5 <211> 20 <212> DNA <213> Artificial Sequence <220> <223> Forward primer of nestin <400> 5 ccagagctgg actggaactc 20 <210> 6 <211> 20 <212> DNA <213> Artificial Sequence <220> <223> Backward primer of nestin <400> 6 acctgcctct tttggttcct 20 <210> 7 <211> 20 <212> DNA <213> Artificial Sequence <220> <223> Forward primer of Musashi <400> 7 tagttcgagg gacaggctct 20 <210> 8 <211> 20 <212> DNA <213> Artificial Sequence <220> <223> Backward primer of Musashi <400> 8 gttgagggac aggcagtagc 20 <210> 9 <211> 19 <212> DNA <213> Artificial Sequence <220> <223> Forward primer of tb3 (TuJ1) <400> 9 gcctttggac acctattca 19 <210> 10 <211> 21 <212> DNA <213> Artificial Sequence <220> <223> Backward primer of tb3 (TuJ1) <400> 10 agtcacaatt ctcacactct t 21 <210> 11 <211> 20 <212> DNA <213> Artificial Sequence <220> <223> Forward primer of GFAB <400> 11 ctccaagatg aaaccaacct 20 <210> 12 <211> 18 <212> DNA <213> Artificial Sequence <220> <223> Backward primer of GFAB <400> 12 ctcctcctcc agcgattc 18 <210> 13 <211> 21 <212> DNA <213> Artificial Sequence <220> <223> Forward primer of Galc <400> 13 ccaaccaact acaaggatga t 21 <210> 14 <211> 18 <212> DNA <213> Artificial Sequence <220> <223> Backward primer of Galc <400> 14 caaacacgcc agtctgat 18 <210> 15 <211> 20 <212> DNA <213> Artificial Sequence <220> <223> Forward primer of olig2 <400> 15 ctgctggcgc gaaactacat 20 <210> 16 <211> 19 <212> DNA <213> Artificial Sequence <220> <223> Backward primer of olig2 <400> 16 cgctcaccag tcgcttcat 19

Claims (9)

1) culturing embryonic stem cells to form an amphibian;
2) separating the somata of step 1) into single cells, and then culturing the isolated single cells to induce the production of neural stem cells;
3) further culturing the neural stem cells of step 2), separating the cells into single cells, and culturing them 5- to 40-times subculture, to differentiate into embryonic stem cell-derived progenitor cells. The method according to claim 1,
Wherein said embryonic stem cells are derived from at least one selected from the group consisting of human, monkey, pig, horse, cow, sheep, dog, cat, mouse and rabbit. Way. The method according to claim 1,
The culture in step 1) is carried out in a DMEM (Dulbeco's modified eagle's) containing fetal calf serum, 2-mercaptoethanol, L-glutamine, non-essential amino acids, penicillin, streptomycin and retinoic acid The present invention relates to a method for differentiating embryonic stem cells into progenitor precursor cells. The method according to claim 1,
Wherein the culture in step 2) is carried out in N2 / B27 medium containing DMEM / F12 medium supplemented with N2 and neurobasal medium supplemented with B27. Differentiation into progenitor cells. The method according to claim 1,
The subculture of step 3) is carried out in N2 / B27 medium containing FGF-2 (Fibroblast growth factor), EGF (Epidermal growth factor) and LIF (leukemia inhibitory factor) Differentiation into progenitor cells. 5. A glial progenitor cell differentiated by the method of any one of claims 1 to 5. The method according to claim 6,
Wherein said glial progenitor cells express nestin, musashi and Sox2. The method of claim 1, wherein the glial precursor cells of claim 6 are cultured for 8-12 days in DMEM medium containing fetal bovine serum (FBS), glutamax-1 additive and N2, A method of differentiating into precursor cells from astrocytes. Culturing the glial progenitor cells of claim 6 for 8 to 12 days in a neurobasal medium comprising T3, glutamex-1 additive and B27 to a dilated glomeruli cell Differentiation method.

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