HEMATOPOIETIC PROGENITOR CELL MARKER

Abstract

Provided is a method for producing a CD4/CD8 double positive cell, including the following steps: step 1: separating, from a cell population containing a hematopoietic progenitor cell, a cell expressing one or more kinds of molecules selected from the first group consisting of CD24, CD62L, CD90, CD143, CD263, Notch3, CD32, CD39, CD49a, CD164, CD317, CD200, CD218a, CD7, CD144, CD56, CD226, CD262 and CD325, and/or a cell not expressing one or more kinds of molecules selected from the second group consisting of CD49f, CD51, CD102, CD42b, CD61, CD62P, CD69, CD102 and CD156c, and step 2: differentiating the cell separated in step 1 into a CD4/CD8 double positive cell.

Claims

1. A method for producing CD4/CD8 double positive cells, the method comprising the following steps: step 1: separating, from a cell population comprising hematopoietic progenitor cells, cells expressing one or more kinds of molecules selected from the first group consisting of CD24, CD62L, CD90, CD143, CD263, Notch3, CD32, CD39, CD49a, CD164, CD317, CD200, CD218a, CD7, CD144, CD56, CD226, CD262 and CD325, and/or a cell not expressing one or more kinds of molecules selected from the second group consisting of CD49f, CD51, CD102, CD42b, CD61, CD62P, CD69, CD102 and CD156c, and step 2: differentiating the cell separated in step 1 into CD4/CD8 double positive cells.

2. The method according to claim 1, wherein the cells selected in said step 1 do not express CD235a or CD14 but express CD45, CD34 and CD43.

3. The method according to claim 1, wherein said step 1 comprises separating, from a cell population comprising hematopoietic progenitor cells, cells expressing one or more kinds of molecules selected from the first group consisting of CD24, CD62L, CD90, CD143, CD263, Notch3, CD32, CD39, CD49a, CD164, CD317, CD200, CD218a, CD7, CD144, CD56, CD226, CD262 and CD325.

4. The method according to claim 3, wherein the first group in said step 1 consists of CD24, CD62L, CD90, CD143, CD263, Notch3, CD200, CD218a, CD7 and CD144.

5. The method according to claim 1, wherein said step 1 comprises separating, from a cell population comprising hematopoietic progenitor cells, cells not expressing one or more kinds of molecules selected from the second group consisting of CD49f, CD51, CD102, CD42b, CD61, CD62P, CD69, CD102 and CD156c.

6. The method according to claim 5, wherein the second group in said step 1 consists of CD49f, CD51 and CD102.

7. The method according to claim 1, wherein the cell population comprising hematopoietic progenitor cells in said step 1 is obtained by inducing differentiation of pluripotent stem cells.

8. The method according to claim 7, wherein said pluripotent stem cells are human induced pluripotent stem cells.

9. A method for producing CD8 single positive cells, comprising a step of inducing CD4/CD8 double positive cells obtained by the method according to claim 1 into CD8 single positive cells.

10. The method according to claim 9, wherein said CD8 single positive cells are cytotoxic T lymphocytes.

11.-14. (canceled)

15. A cell population comprising hematopoietic progenitor cells expressing one or more kinds of molecules selected from the first group consisting of CD24, CD62L, CD90, CD143, CD263, Notch3, CD32, CD39, CD49a, CD164, CD317, CD200, CD218a, CD7, CD144, CD56, CD226, CD262 and CD325, and/or hematopoietic progenitor cells not expressing one or more kinds of molecules selected from the second group consisting of CD49f, CD51, CD102, CD42b, CD61, CD62P, CD69, CD102 and CD156c, at a ratio of [number of the hematopoietic progenitor cells/total number of cells in the cell population] not less than 40%.

16. The cell population according to claim 15, wherein the ratio is of the hematopoietic progenitor cells expressing one or more kinds of molecules selected from the first group consisting of CD24, CD62L, CD90, CD143, CD263, Notch3, CD200, CD218a, CD7 and CD144.

17. The cell population according to claim 15, wherein the ratio is of the hematopoietic progenitor cells not expressing one or more kinds of molecules selected from the second group consisting of CD49f, CD51 and CD102.

18. A reagent for separating hematopoietic progenitor cells, the reagent comprising an antibody to each of one or more kinds of molecules selected from the group consisting of CD24, CD62L, CD90, CD143, CD263, Notch3, CD32, CD39, CD49a, CD164, CD317, CD200, CD218a, CD7, CD144, CD56, CD226, CD262, CD325, CD49f, CD51, CD102, CD42b, CD61, CD62P, CD69, CD102 and CD156c.

19. The reagent according to claim 18, further comprising one or more kinds of antibodies to CD235a, CD14, CD45, CD34 and/or CD43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0018] The present invention provides a method for producing CD8 positive cells (e.g., CD4/CD8DP cell), including (step 1) separating cells expressing one or more kinds of hematopoietic progenitor cell markers (sometimes to be abbreviated as “HPC marker” in the present specification”) and/or a cell not expressing one or more kinds of HPC markers from a cell population containing a hematopoietic progenitor cell, and (step 2) differentiating the cells separated in step 1 into a CD8 positive cells (e.g., CD4/CD8 double positive cell (sometimes to be abbreviated as “CD4/CD8DP cell” in the present specification) (hereinafter to be abbreviated as “the production method of the present invention”) and the like.

[0019] In the present invention, the “CD8 positive cell” means a cell expressing CD8, and examples thereof include CD4/CD8DP cell and CD8 single positive cell (sometimes to be abbreviated as “CD8SP cell” in the present specification). In the present invention, the “CD4/CD8DP cell” means a T cell simultaneously expressing CD4 and CD8, and the “CD8SP cell” means a T cell not expressing CD4 but expressing CD8. Examples of the CD8SP cell include cytotoxic T lymphocyte and progenitor cell thereof. In the present invention, moreover, “T cell” means, for example, a cell expressing an antigen receptor called a T cell receptor (TCR) on its surface, and a progenitor cell thereof (e.g., pro-T cell not expressing TCR (TCRαβ), pre-T cell in which TCRβ and pre-TCRα are associated).

[0020] In the present invention, the “hematopoietic progenitor cell” means a CD34 positive cell, preferably a CD34/CD43DP cell. The derivation of the hematopoietic progenitor cell to be used in the present invention is not limited and may be, for example, a hematopoietic progenitor cell induced in vitro (e.g., a hematopoietic progenitor cell obtained by inducing differentiation of pluripotent stem cell) by a known method (e.g., methods described in patent documents 1, 2, non-patent documents 1-3), or a hematopoietic progenitor cell isolated from a biological tissue by a known method.

[0021] Examples of the pluripotent stem cell include embryonic stem cell (ES cell), induced pluripotent stem cell (iPS cell), embryonic carcinoma cell (EC cell) and embryonic germ cell (EG cell), preferably iPS cell (more preferably human iPS cell). When the above-mentioned pluripotent stem cell is ES cell or any cell derived from human embryo, the cell may be produced by destroying an embryo or produced without destroying embryo, with preference given to a cell produced without destroying embryo.

[0022] The above-mentioned iPS cell is an artificial stem cell derived from a somatic cell having characteristics substantially equal to those of ES cell, for example, pluripotency and proliferation potency by self-replication, and can be produced by introducing particular reprogramming factors in the form of DNA or protein into a somatic cell (e.g., Takahashi K. and Yamanaka S. (2006) Cell, 126; 663-676: Takahashi K. et al. (2007) Cell, 131; 861-872: Yu J. et al. (2007) Science, 318; 1917-1920: Nakagawa M. et al. (2008) Nat. Biotechnol. 26; 101-106). When an iPS cell is used, it may be produced from a somatic cell by a method known per se or iPS cell already established and stocked may also be used. While the somatic cell from which iPS cell to be used in the present invention is derived is not limited, it is preferably a cell derived from peripheral blood or cord blood. The animal from which pluripotent stem cell is derived is not limited and, for example, mammals such as mouse, rat, hamster, guinea pig, dog, monkey, orangutan, chimpanzee, human and the like can be mentioned, with preference given to human.

[0023] A hematopoietic progenitor cell can be produced by subjecting the aforementioned pluripotent stem cell to a method known per se. When the aforementioned pluripotent stem cell is an iPS cell, a hematopoietic progenitor cell can be produced by the method described in, for example, WO 2017/221975.

[0024] The aforementioned biological tissue is not particularly limited as long as it contains hematopoietic progenitor cells. Examples thereof include peripheral blood, lymph node, bone marrow, thymus, spleen and cord blood. Of these, peripheral blood and cord blood are preferable since they show low invasiveness in animals and preparation thereof is easy.

[0025] The hematopoietic progenitor cell and pluripotent stem cell to be used in the present invention are preferably cells meeting the GMP (Good Manufacturing Practice) standard from the zo aspect of application to treatments.

[0026] In the present invention, the “HPC marker” means any molecule from CD24, CD62L, CD90, CD143, CD263, Notch3, CD32, CD39, CD49a, CD164, CD317, CD200, CD218a, CD7, CD144, CD56, CD226, CD262 and CD325, which are molecules possibly expressed on the surface of hematopoietic progenitor cell (in the specification, these markers are sometimes referred to as “HPC positive marker(s)”, “positive HPC selection marker(s)”, or “positive HPC marker(s)”), or any molecule from CD49f, CD51, CD102, CD42b, CD61, CD62P, CD69, CD102 and CD156c, which are molecules not generally expressed on the surface of hematopoietic progenitor cell (in the specification, these markers are sometimes referred to as “HPC negative marker(s)”, “negative HPC selection marker(s)”, or “negative HPC marker(s)”) (In the present description, HPC positive marker and HPC negative marker are sometimes to be collectively referred to as “the HPC marker(s) of the present invention”). Of the HPC positive markers of the present invention, CD24, CD62L, CD90, CD143, CD263, Notch3, CD200, CD218a, CD200, CD7 or CD144 is preferable, and CD90, CD143, CD218a or CD200 is more preferable. In another embodiment, CD24, CD62L, CD90, CD143, CD263, Notch3, CD32, CD39, CD49a, CD164, CD317, CD200 or CD218a is preferable, and CD24, CD62L, CD90, CD143, CD263, Notch3, CD200 or CD218a is more preferable. In the present invention, moreover, a cell expressing the aforementioned HPC positive marker is sometimes called an HPC marker positive cell (or HPC marker positive cell) and, for example, a cell expressing CD24 molecule is sometimes called a CD24 positive cell. Of the HPC negative markers of the present invention, CD49f, CD51 or CD102 is preferable. In the present invention, a cell that does not express the aforementioned HPC negative markers is sometimes referred to as an HPC marker negative cell.

[0027] In an exemplary embodiment, the CD8 positive cells, preferably CD4/CD8 double positive cells, are produced by separating, from a cell population comprising hematopoietic progenitor cells, cells (a) expressing CD34 and CD43, and (b) expressing either CD62L, CD24, CD90, CD143, CD218a, CD263, or Notch3, and (c) not expressing CD235a or CD14.

[0028] In an exemplary embodiment, the CD8 positive cells, preferably CD4/CD8 double positive cells, are produced by separating, from a cell population comprising hematopoietic progenitor cells, cells expressing (a) CD34 and CD43, and (b) expressing either CD90, CD143, CD200, CD218a, or CD263, and (c) not expressing CD235a or CD14.

[0029] In an exemplary embodiment, the CD8 positive cells, preferably CD4/CD8 double positive cells, are produced by separating, from a cell population comprising hematopoietic progenitor cells, cells expressing (a) CD34 and CD43, and (b) expressing either CD7, CD144, CD56, CD226, CD262, or CD325 and (c) not expressing CD235a or CD14.

[0030] In an exemplary embodiment, the CD8 positive cells, preferably CD4/CD8 double positive cells, are produced by separating, from a cell population comprising hematopoietic progenitor cells, cells expressing (a) CD34 and CD43, and (b) not expressing either CD49f, CD51, CD426, CD61, CD62P, CD69, or CD156c and (c) not expressing CD235a or CD14.

[0031] In the present invention, “expressing” means that the expression can be detected by the method used for separating cells, and “not expressing” means that the detection is not possible with the detection sensitivity of the method used for separating cells. As the method used for separating cells, a method using the below-mentioned flow cytometry or mass cytometry, a magnetic cell separation method and the like can be mentioned.

[0032] As the cell separated by the aforementioned step 1, a cell expressing one or more kinds of HPC positive markers, a cell not expressing one or more kinds of HPC negative markers can be mentioned. In one embodiment of the present invention, the cells separated by the aforementioned step 1 are cells expressing CD34 and/or CD43 in addition to one or more kinds of HPC positive markers of the present invention, and/or are cells not expressing one or more kinds of HPC negative markers of the present invention and expressing CD34 and/or CD43. The cell to be separated is preferably CD235a negative, CD14 negative and/or CD45 positive. Therefore, in a preferable embodiment of the present invention, the aforementioned step 1 is performed by separating one or more kinds of cells which are CD235a negative, CD14 negative, CD45 positive, CD34 positive and CD43 positive, and positive for one or more kinds of the positive HPC marker(s) of the present invention and/or cells negative for one or more kinds of the negative HPC markers of the present invention, from a cell population containing hematopoietic progenitor cells.

[0033] In the present invention, “separating cells” encompasses an embodiment including selecting cells expressing one or more kinds of HPC positive markers and/or not expressing one or more kinds of HPC negative markers and isolating the selected cells, and an embodiment including subjecting the selected cells to a next differentiation step.

[0034] As used herein, each occurrence of terms such as “comprising” or “comprises” may optionally be substituted with “consisting of” or “consists of”.

[0035] Examples of the method for separating cells expressing one or more kinds of HPC positive markers and/or not expressing one or more kinds of HPC negative markers from a cell population containing hematopoietic progenitor cells include a method using flow cytometry or mass cytometry, a magnetic cell separation method and the like, and these methods can be performed using known methods. For example, a cell expressing one or more kinds of HPC positive markers and/or a cell not expressing one or more kinds of HPC negative markers can be separated by a method including a step of contacting the cell with a substance (e.g., antibody) that specifically binds to each HPC marker. The above-mentioned substance includes one directly added with a detectable label (e.g., GFP) and one not directly added with a label. When the above-mentioned substance is one not directly added with a label, the above-mentioned separation can be performed by further using a substance added with a detectable label that directly or indirectly recognizes the substance. For example, when the above-mentioned substance is an antibody, the antibody may carry, directly or indirectly, a fluorescence dye, metal isotope or bead (e.g., magnetic bead) to thereby label an HPC marker on the cell surface. The cells can be separated based on the label. The antibody used here may be only one kind or two or more kinds of antibodies.

[0036] Examples of the method for differentiating a cell separated as a cell expressing one or more kinds of HPC positive markers and/or not expressing one or more kinds of HPC negative markers of the present invention from a cell population containing hematopoietic progenitor cells into CD8 positive cells include known methods (e.g., methods described in WO 2016/076415, Journal of Leukocyte Biology 96(2016)1165-1175, Cell Reports 2(2012) 1722-1735, WO 2017/221975).

1. Production Method of CD4/CD8DP Cells Examples of the basal medium for cell culture to be used in step 2 of the production method of the present invention include Iscove's Modified Dulbecco's Medium (IMDM) medium, Medium 199 medium, Eagle's Minimum Essential Medium (EMEM) medium, αMEM medium, Dulbecco's modified Eagle's Medium (DMEM) medium, Ham's F12 medium, RPMI 1640 medium, Fischer's medium, Neurobasal Medium (Life Technologies) and a mixed medium of these. The medium may or may not contain serum. Where necessary, the basal medium may also contain one or more substances from Vitamin Cs (e.g., ascorbic acid, vitamin c phosphate), albumin, insulin, transferrin, selenium, fatty acid, trace elements, 2-mercaptoethanol, thiol glycerol, lipids, amino acids, L-glutamine, non-essential amino acids, vitamins, growth factors, low-molecular-weight compounds, antibiotics, antioxidants, pyruvic acid, buffers, inorganic salts, cytokines, and the like.

[0037] The aforementioned medium preferably contains cytokine. As the cytokine, IL-7, FLT-3L, SCF, TPO and a combination of these and the like can be mentioned, and FLT-3L and IL-7 are preferable. The concentration of IL-7 in the medium is preferably 1 ng/ml-50 ng/ml (e.g., 1 ng/ml, 2 ng/ml, 3 ng/ml, 4 ng/ml, 5 ng/ml, 6 ng/ml, 7 ng/ml, 8 ng/ml, 9 ng/ml, 10 ng/ml, 20 ng/ml, 30 ng/ml, 40 ng/ml, 50 ng/ml), and 5 ng/ml is particularly preferable. The concentration of FLT-3L in the medium is preferably 1 ng/ml-100 ng/ml (e.g., 1 ng/ml, 2 ng/ml, 3 ng/ml, 4 ng/ml, 5 ng/ml, 6 ng/ml, 7 ng/ml, 8 ng/ml, 9 ng/ml, 10 ng/ml, 20 ng/ml, 50 ng/ml, 100 ng/ml), and 10 ng/ml is particularly preferable. Those of ordinary skill in the art can appropriately determine the concentration of other cytokines based on the culture conditions and the like. The medium preferably contains a Notch ligand (e.g., fusion protein of D111, D114, D111 or D114, and Fc). When a Notch ligand is used, it may be added to the medium, or coated on the culture container. In addition, a feeder cell expressing a Notch ligand may also be used.

[0038] In the production method of the present invention, the hematopoietic progenitor cells obtained in step 1 may be cultured by adherent culture or suspension culture. In cases of adherent culture, a coated culture vessel may be used, and the hematopoietic progenitor cells may be co-cultured with feeder cells and other cells. For application to the treatments, it is preferable feeder free. Examples of the substrate for coating a culture container include fibronectin fragment (e.g., RetroNectin), Pronectin, vitronectin, Matrigel (BD), Type I collagen, Type IV collagen, gelatin, laminin, heparan sulfuric acidproteoglycan, entactin, and a combination of these. As a feeder cell to be cocultured, for example, OP9 cell of bone marrow interstitial cell line, 10T1/2 cell of mouse mesenchymal cell line, and Tst-4 cell can be mentioned. When feeder cells are used, they are preferably appropriately replaced during the culture. The replacement of the feeder cells may be carried out by transferring the subject cells that are being cultured onto feeder cells that are preliminarily plated. The replacement is preferably performed every 2 to 5 days.

[0039] In the present invention, the culture temperature conditions for culturing the hematopoietic progenitor cells to induce CD4/CD8 DP cells are not limited. The temperature is preferably about 37° C. to about 42° C., more preferably about 37 to about 39° C. The culture period can be appropriately determined by those skilled in the art by monitoring of the number of CD4/CD8 DP cells and other cells. The number of days of the culture, which induces CD4/CD8 DP cells from the hematopoietic progenitor cells, is not limited as long as CD4/CD8 DP cells can be obtained. It is preferably not less than 10 days (e.g., 12 days, 14 days, 16 days, 18 days, 20 days or longer), and not more than 60 days is preferable. As shown in the below-mentioned Examples, in a particular embodiment, a large amount of CD4/CD8DP cell can be efficiently obtained by culturing for 21 days-28 days.

[0040] In the present invention, the obtained CD4/CD8DP cells may be isolated before use, or may be used as a cell population containing other cell type (e.g., CD8SP cell). When isolated, the cells can be isolated using CD4, CD8, CD3, CD45 molecules and the like as an index. As the isolation method, a method well known to those of ordinary skill in the art can be used and, for example, a method including labeling with an antibody to a molecule to be the index and using the aforementioned flow cytometry or mass cytometry, a magnetic cell separation method, or a purification method using an affinity column on which a desired antigen is immobilized and the like can be mentioned.

2. Production Method of CD8 Single Positive Cells

[0041] CD8SP cells can be produced by subjecting the CD4/CD8DP cells obtained by the production method of the present invention to a step for inducing differentiation into CD8SP cells (such production method of CD8SP cells is sometimes to be abbreviated as “the production method of CD8SP cells of the present invention”). The production method of CD4/CD8DP cells is as described in 1.

[0042] As the basal medium and medium to be used for the production method of CD8SP cells of the present invention, those similar to the basal medium and medium described in 1. can be mentioned.

[0043] The aforementioned medium may contain an adrenocortical hormone agent. Examples of the adrenocortical hormone agent include, for example, a glucocorticoid and a derivative thereof. Examples of the glucocorticoid include, for example, cortisone acetate, hydrocortisone, fludrocortisone acetate, prednisolone, triamcinolone, methylprednisolone, dexamethasone, betamethasone, and beclometasone dipropionate. Of these, dexamethasone is preferable. Thus, in one embodiment, the method for producing CD8 single positive cells comprises a step of inducing CD4/CD8 double positive cells into CD8 single positive cells by culturing said CD4/CD8 double positive cells in the presence of an adrenocortical hormone agent, preferably dexamethasone.

[0044] When dexamethasone is used as the adrenocortical hormone agent, its concentration in the culture medium is preferably 1 nM-100 nM (e.g., 1 nM, 5 nM, 10 nM, 20 nM, 30 nM, 40 nM, 50 nM, 60 nM, 70 nM, 80 nM, 90 nM, 100 nM), particularly preferably 10 nM.

[0045] The aforementioned medium may contain antibody (e.g., anti-CD3 antibody, anti-CD28 antibody, anti-CD2 antibody), cytokine (e.g., IL-7, IL-2, IL-15) and the like.

[0046] Anti-CD3 antibody used in the present invention is not particularly limited as long as it specifically recognizes CD3. For example, an antibody produced from OKT3 clone can be mentioned. The anti-CD3 antibody may be bonded to magnetic beads and the like or, instead of adding the aforementioned anti-CD3 antibody to the medium, stimulation may be given by incubating the T lymphocytes for a given period on a culture vessel to which the anti-CD3 antibody is bound on the surface thereof. The concentration of anti-CD3 antibody in the medium is preferably 10 ng/ml-1000 ng/ml (e.g., 10 ng/ml, 50 ng/ml, 100 ng/ml, 200 ng/ml, 300 ng/ml, 400 ng/ml, 500 ng/ml, 600 ng/ml, 700 ng/ml, 800 ng/ml, 900 ng/ml, 1000 ng/ml), particularly preferably 500 ng/ml. The concentration of other antibodies can also be appropriately determined by those of ordinary skill in the art based on the culture conditions and the like. Thus, in one embodiment, the method for producing CD8 single positive cells comprises a step of inducing CD4/CD8 double positive cells into CD8 single positive cells by culturing said CD4/CD8 double positive cells in the presence of an anti-CD3 antibody.

[0047] The concentration of IL-2 in the medium used in the present invention is preferably 10 U/ml-1000 U/ml (e.g., 10 U/ml, 20 U/ml, 30 U/ml, 40 U/ml, 50 U/ml, 60 U/ml, 70 U/ml, 80 U/ml, 90 U/ml, 100 U/ml, 500 U/ml, 1000 U/ml), particularly preferably 100 U/ml. The concentration of IL-7 or IL15 in the medium used in the present invention is preferably 1 ng/ml-100 ng/ml (e.g., 1 ng/ml, 5 ng/ml, 10 ng/ml, 20 ng/ml, 30 ng/ml, ng/ml, 50 ng/ml, 60 ng/ml, 70 ng/ml, 80 ng/ml, 90 ng/ml, 100 ng/ml), particularly preferably 10 ng/ml. Thus, in one embodiment, the method for producing CD8 single positive cells comprises a step of inducing CD4/CD8 double positive cells into CD8 single positive cells by culturing said CD4/CD8 double positive cells in the presence of a cytokine, preferably IL-2.

[0048] In the production method of CD8SP cells of the present invention, the temperature conditions for culturing the CD4/CD8DP cells are not particularly limited. The temperature is preferably about 37° C. to about 42° C., more preferably about 37 to about 39° C. The culture period may be appropriately determined by those skilled in the art by monitoring the number of CD8 positive cells and other cells. The number of days of the culture is not limited as long as CD8SP cells can be obtained. The culture period is preferably not less than 1 day, not less than 3 days, not less than 7 days, and preferably not more than 60 days.

[0049] CD8SP cells produced by the production method of the present invention is not limited to the cells obtained by differentiation from CD4/CD8DP cells (e.g., cells obtained in the above-mentioned 2.). Therefore, for example, CD8SP cells induced, without via CD4/CD8DP cells, from cells separated as a cell expressing one or more HPC positive markers and/or not expressing one or more HPC negative markers of the present invention from a cell population containing hematopoietic progenitor cells is also encompassed in the CD8SP cells produced by the production method of the present invention.

3. Cell Population Containing Hematopoietic Progenitor Cells Expressing One or More HPC Markers

[0050] The present invention provides a cell population (hereinafter to be abbreviated as “the cell population of the present invention”) containing, at high frequency, hematopoietic progenitor cells expressing one or more kinds of HPC positive markers and/or not expressing one or more HPC negative markers. The aforementioned cell population can be obtained by, for example, separating cells expressing one or more HPC positive markers and/or not expressing one or more HPC negative markers from a cell population containing hematopoietic progenitor cells by a separation method described above. The definition of HPC marker, specific molecules and definition of hematopoietic progenitor cell are as described above.

[0051] The cell population of the present invention is not limited as long as it shows a higher ratio of a hematopoietic progenitor cells expressing one or more kinds of HPC positive markers and/or not expressing one or more kinds of HPC negative markers (number of hematopoietic progenitor cells/total number of cells contained in cell population) than that obtained by a conventional method (e.g., method of separation using CD34 positive, CD34 positive and CD43 positive, or CD43 positive and CD34, CD31 or CD144 positive as an index). It is preferably not less than 40% (e.g., not less than 50%, not less than 60%, not less than 70%, not less than 80%, not less than 90%, 100%). The cell population of the present invention can be obtained by the method described in step 1 of the production method of the present invention. The proportion of the hematopoietic progenitor cells expressing one or more HPC positive markers and/or not expressing one or more HPC negative markers can be measured by flow cytometry.

[0052] As shown in the below-mentioned Examples, the cell population of the present invention shows high differentiation efficiency into CD4/CD8DP cells and CD8SP cells as compared to a cell population that has not undergone separation of a cell expressing one or more kinds of HPC positive markers and/or not expressing one or more kinds of HPC negative markers, and is also superior in the proliferation potency.

4. Reagent for Separating “the Cell Population of the Present Invention”

[0053] The present invention also provides a reagent for separating the cell population of the present invention (hereinafter to be abbreviated as “the reagent of the present invention”), which contains an antibody to the HPC marker of the present invention, namely, one or more kinds of markers selected from the group consisting of CD24, CD62L, CD90, CD143, CD263, Notch3, CD32, CD39, CD49a, CD164, CD317, CD200, CD218a, CD7, CD144, CD56, CD226, CD262, CD325, CD49f, CD51, CD102, CD42b, CD61, CD62P, CD69, CD102 and CD156c, preferably, CD24, CD62L, CD90, CD143, CD263, Notch3, CD200, CD218a, CD7, CD144, CD49f, CD51 and CD102. When the reagent of the present invention contains antibodies to two or more kinds of HPC marker, the reagent may be provided as a reagent kit containing each antibody in a separate reagent. The antibody to be contained in the reagent of the present invention may be provided in the form of, for example, fluorescence dye, metal isotope or bead (e.g., magnetic bead) bonded thereto, according to the separation means used in step 1 of the production method of the present invention.

[0054] The reagent of the present invention can further contain an anti-CD4 antibody and/or an anti-CD8 antibody and, where necessary, one or more kinds of antibodies to other cell surface markers (e.g., CD3, CD45, CD235a, CD14, CD45, CD34, CD43) known to express or not express in CD4/CD8DP cell and/or CD8SP cell, and can be used as a reagent for separating CD4/CD8DP cell or CD8SP cell induced to differentiate from the cell population of the present invention.

[0055] In addition, the reagent of the present invention can further contain reagents (e.g., basal medium, medium additive and the like) for inducing differentiation of hematopoietic progenitor cells into CD4/CD8DP cell and further into CD8SP cell. As the reagents, substances exemplified in the above-mentioned 1. and the above-mentioned 2. can be similarly recited.

[0056] The present invention is explained in more detail in the following by referring to Examples, which are mere exemplifications and do not limit the present invention.

EXAMPLES

Example 1 (Consideration Using TKT3V1-7 Strain)

[0057] As a cell population containing hematopoietic progenitor cells (hereinafter sometimes referred to as HPC), a non-adherent cell population obtained by differentiation of iPS cells (TKT3V1-7 strain) according to a known method (for example, the methods described in Cell Reports 2(2012) 1722-1735 and WO 2017/221975) was used. To be specific, TKT3V1-7 strain was seeded at 3×10.sup.5 cells/well in a 6 well plate that underwent an ultra low adhesion treatment (Day0), and cultured for 5 days under low oxygen conditions (5% 0.sub.2) in EB medium (StemPro34 added with 10 μg/ml human insulin, 5.5 μg/ml human transferrin, 5 ng/ml sodium selenite, 2 mM L-glutamine, 45 mM α-monothioglycerol and 50 μg/ml ascorbic acid) supplemented with 10 ng/ml BMP4, 5 ng/ml bFGF, 15 ng/ml VEGF, 2 μM SB431542 (Day5). Successively, 50 ng/ml SCF, 30 ng/ml TPO, 10 ng/ml Flt3L were added and the cells were further cultured for 5-9 days (−Day14) to give a non-adherent cell population. The medium was exchanged every 2 or 3 days during the culture period. The above-mentioned non-adherent cell population containing HPC was stained with the following antibody set for each sample group.

TABLE-US-00001 TABLE 1 fluorescent sample group molecule bonded (antibody set) antibody manufacturer to antibody 1 anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD62L antibody Biolegend PE 2 anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD24 antibody Biolegend PE 3 anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD90 antibody Biolegend PE 4 anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD143 antibody Biolegend PE 5 anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD BV510 anti-CD45 antibody Biolegend APC/Cy7 anti-CD14 antibody Biolegend FITC anti-CD235a antibody BD FITC anti-CD218a antibody eBioscience APC 6 anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD263 antibody Biolegend PE 7 anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-Notch3 antibody Biolegend PE

[0058] The cell populations after the above-mentioned staining were subjected to sorting by FACSAria. The cell fractions obtained from each of the above-mentioned sample groups are shown below.

TABLE-US-00002 TABLE 2 sample group obtained cell fraction 1 fraction A, fraction B and fraction C 2 Fraction D and fraction E 3 Fraction F and fraction G 4 Fraction H and fraction I 5 Fraction J and fraction K 6 Fraction L and fraction M 7 Fraction N and fraction O

[0059] In the above Table, fractions A-G respectively show the following.

[0060] fraction A: CD235a negative, CD14 negative, CD34 positive, CD43 positive

[0061] fraction B: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD62L positive

[0062] fraction C: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD62L negative

[0063] fraction D: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD24 positive

[0064] fraction E: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD24 negative

[0065] fraction F: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD90 positive

[0066] fraction G: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD90 negative

[0067] fraction H: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD143 positive

[0068] fraction I: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD143 negative

[0069] fraction J: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD218a positive

[0070] fraction K: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD218a negative

[0071] fraction L: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD263 positive

[0072] fraction M: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD263 negative

[0073] fraction N: CD235a negative, CD14 negative, CD34 positive, CD43 positive, Notch3 positive

[0074] fraction O: CD235a negative, CD14 negative, CD34 positive, CD43 positive, Notch3 negative

[0075] The cells containing in the above-mentioned fractions A-O were differentiated into lymphoid cells according to a known method (for example, the methods described in Journal of Leukocyte Biology 96(2016) 1165-1175 and WO 2017/221975). To be specific, each cell population of fractions A-O was seeded at 2000 cells/well in a 48-well-plate coated with Recombinat h-DLL4/Fc chimera (Sino Biological) and Retronectin (Takara Bio Inc.), and cultured under the conditions of 5% CO.sub.2, 37° C. During the culture period, the medium was changed every 2 or 3 days. As the medium, OP9 medium (containing 15% FBS, 2 mM L-glutamine, 100 Uml penicillin, 100 ng/ml streptomycin, 55 μM 2-mercaptoethanol, 50 μg/ml ascorbic acid, 10 ng/ml human insulin, 5. 5 μg/ml human transferrin, 5 ng/ml sodium selenite) added with 50 ng/ml SCF, 50 ng/ml IL-7, 50 ng/ml Flt3L, 100 ng/ml TPO, 15 μM SB203580, 30 ng/ml SDF-1α was used. On day 7 and day 14 from the start of culturing, the cells were passaged in a 48-so well-plate with similar coating. All cells were recovered on day 21 from the start of culturing, counted using a hemocytometer and stained using the following antibody set.

TABLE-US-00003 TABLE 3 fluorescence molecule Antibody set manufacturer bonded to antibody anti-CD3 Biolegend APC/Cy7 antibody anti-CD45 Biolegend Brilliant Violet 510 antibody anti-TCRab eBioscience FITC antibody anti-CD8b Beckman PE antibody anti-CD7 Biolegend APC antibody anti-CD5 eBioscience PE/Cy7 antibody anti-CD8a Biolegend PerCP/Cy5.5 antibody anti-CD4 Biolegend BV421 antibody

[0076] The cell populations after the above-mentioned staining were subjected to sorting by FACSAria. The cell fractions obtained by the above-mentioned sorting are shown below. In the present description, the lymphocyte fraction refers to a fraction separated using FSC (forward scatter) and SSC (side scatter) as indices in the same manner as in the method described in Cytometry (Communications in Clinical Cytometry) 18 (1994) 199-208.

[0077] fraction P: lymphocyte fraction

[0078] fraction Q: lymphocyte fraction, CD3 positive, CD45 positive, CD5 positive, CD7 positive

[0079] fraction R: lymphocyte fraction, CD3 positive, CD45 positive, CD7 positive, CD8a positive, CD4 positive

[0080] fraction S: lymphocyte fraction, CD3 positive, CD45 positive, CD7 positive, CD8a positive, CD4 negative

[0081] The number of cells of each sample derived from fractions A-O on day 21 from the start of culture (ratio to the number of cells of sample derived from fraction A) is shown in Table 4.

TABLE-US-00004 TABLE 4 Fraction Fraction Fraction Fraction Fraction Fraction Fraction Fraction Fraction Fraction Fraction Fraction Fraction Fraction Fraction A B C D E F G H I J K L M N O 1 6.1 0.9 4.9 1 2.4 0.5 5.8 1 9.4 1.6 5.9 0.6 14 0.8

[0082] From Table 4, it was found that the cell populations contained in the samples derived from fraction B (CD62L positive), fraction D (CD24 positive), fraction F (CD90 positive), fraction H (CD143 positive), fraction J (CD218a positive), fraction L (CD263 positive) and fraction N (Notch3 positive) are superior in the proliferation potency as compared to the cell population contained in the sample derived from fraction A.

[0083] The number of cells of cell fractions P-S obtained by sorting by FACSAria on day 21 of culture (ratio to the number of cells of sample derived from fraction A) is shown in Table 5.

TABLE-US-00005 TABLE 5 Fraction P Fraction Q Fraction R Fraction S derived 1 1 1 1 from Fraction A derived 4.2-7.9 19-62  26-222 23-69 from Fraction F derived 6.4-9.2 42-83 143-458 46-67 from Fraction H derived 6.1-7.9 31-50 191-455 20-28 from Fraction J

[0084] As a result, it was shown that a cell population containing (a) CD3 positive, CD45 positive, CD5 positive, CD7 positive, CD8a positive, and CD4 positive cells or (b) CD3 positive, CD45 positive, CD5 positive, CD7 positive, CD8a positive, and CD4 negative cells at a high ratio can be prepared using the cells derived from fraction F, as compared to the use of cells derived from fraction G or fraction A. Similarly, it was shown that a cell population containing a high proportion of (a) CD3 positive, CD45 positive, CD5 positive, CD7 positive, CD8a positive, and CD4 positive cells, or (b) a cell population containing a high proportion of CD3 positive, CD45 positive, CD5 positive, CD7 positive, CD8a positive, and CD4 negative cells can be prepared by using cells derived from fraction H. Also, it was shown that a cell population containing CD3 positive CD45 positive CD5 positive CD7 positive CD8a positive CD4 positive cell or CD3 positive CD45 positive CD5 positive CD7 positive CD8a positive CD4 negative cell at a high ratio can be prepared using the cells derived from fraction J, as compared to the use of cells derived from fraction K or fraction A. That is, it was shown that a cell population containing CD4/CD8 double positive cell (or CD8 positive cell) at a high ratio can be prepared by separating cells expressing CD90, CD143 or CD218a as a cell population containing hematopoietic progenitor cells and differentiating the separated cells.

Example 2 ((Consideration Using Ff-I01s04 Strain)

[0085] As a cell population containing hematopoietic progenitor cells (hereinafter sometimes referred to as HPC), a non-adherent cell population obtained by differentiation of iPS cells (Ff-I01s04 strain) according to the methods described in Example 1 was used.

[0086] The cell population containing HPC was stained with an antibody set 3, 4, 5 or 6 for each sample group shown in Example 1 (respectively indicated as 3b, 4b, 5b, 6b in this Example) or antibody set 8b shown below.

TABLE-US-00006 TABLE 6 fluorescence sample group molecule bonded (antibody set) antibody manufacturer to antibody 3b anti-CD34 antibody Abcam PE/Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD90 antibody Biolegend PE 8b anti-CD34 antibody Abcam PE/Cy7 anti-CD43 antibody BD BV510 anti-CD45 antibody Biolegend APC/Cy7 anti-CD14 antibody Biolegend FITC anti-CD235a antibody BD FITC anti-CD200 antibody Biolegend Brilliant Violet 421 4b anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD143 antibody Biolegend PE 5b anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD BV510 anti-CD45 antibody Biolegend APC/Cy7 anti-CD14 antibody Biolegend FITC anti-CD235a antibody BD FITC anti-CD218a antibody eBioscience APC 6b anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD263 antibody Biolegend PE

[0087] The cell populations after the above-mentioned staining were subjected to sorting by FACSAria. The cell fractions obtained from each of the above-mentioned sample groups are shown below.

TABLE-US-00007 TABLE 7 sample group obtained cell fraction 3b Fraction f and fraction g 8b Fraction t and fraction u 4b Fraction h and fraction i 5b Fraction j and fraction k 6b Fraction l and fraction m

[0088] In the above Table, fractions f-m, t and u respectively show the following.

fraction f: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD90 positive
fraction g: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD90 negative
fraction h: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD143 positive
fraction i: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD143 negative
fraction j: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD218a positive
fraction k: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD218a negative
fraction l: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD263 positive
fraction m: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD263 negative
fraction t: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD200 positive
fraction u: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD200 negative

[0089] The cells contained in the above-mentioned fractionsf-m, t and u were differentiated into lymphoid cells according to the methods described in Example 1. All cells were recovered on day 28 from the start of culturing and stained using the following antibody set.

TABLE-US-00008 TABLE 8 fluorescence molecule Antibody set manufacturer bonded to antibody CD3 Biolegend APC/Cy7 CD45 Biolegend Brilliant Violet 510 TCRab eBioscience FITC CD8b Beckman PE CD7 Biolegend APC CD5 eBioscience PE/Cy7 CD8a Biolegend PerCP/Cy5.5 CD4 Biolegend BV421

[0090] The cell populations after the above-mentioned staining were subjected to sorting by FACSAria. The cell fractions obtained by the above-mentioned sorting are shown below.

fraction p: lymphocyte fraction
fraction q: lymphocyte fraction, CD45 positive, CD5 positive, CD7 positive
fraction r: lymphocyte fraction, CD45 positive, CD7 positive, CD8a positive, CD4 positive
fraction s: lymphocyte fraction, CD45 positive, CD7 positive, CD8a positive, CD4 negative

[0091] The number of cells of each sample derived from fractions f-m, t and u on day 28 from the start of culturing (ratio to the number of cells when the culturing was started) is shown in Table 9.

TABLE-US-00009 TABLE 9 Frac- Frac- Frac- Frac- Frac- Frac- Frac- Frac- Frac- Frac- tion tion tion tion tion tion tion tion tion tion f g h i j k l m t u 462.5 111.9 462.5 112.5 1125 50 1222.6 56.25 850 62.5

[0092] From Table 9, it was found that fraction f is superior to fraction g, fraction h is superior to fraction i, fraction j is superior to fraction k, fraction l is superior to fraction m and fraction t is superior to fraction u, each in the proliferation potency. That is, it was found that the cell populations contained in the samples derived from CD90 positive, CD143 positive, CD218a positive, CD263 positive or CD200 positive are superior in the proliferation potency.

[0093] The number of cells of cell fractions p-s obtained by sorting by FACSAria on day 28 of culturing when the cells contained in fractions f-m, t and u were seeded at 1000 cells/well is shown in Table 10.

TABLE-US-00010 TABLE 10 Fraction p Fraction q Fraction r Fraction s derived from 208125 139860 7553 40626 Fraction f derived from 12085 0 0 0 Fraction g derived from 151700 96801 18704 81257 Fraction h Fraction i 11216 0 0 0 derived from derived from 409500 322088 83093 228521 Fraction j derived from 4430 0 0 0 Fraction k derived from 419352 257113 22019 277591 Fraction l derived from 8325 2683 159 3992 Fraction m derived from 342550 262480 59781 125477 Fraction t derived from 2569 0 0 0 Fraction u

[0094] An analysis by FACS on day 28 of culture shown in Table reveals that (a) CD45 positive, CD5 positive, CD7 positive, CD8a positive, and CD4 positive cells, or (b) CD45 positive, CD5 positive, CD7 positive, CD8a positive, and CD4 negative cells can be prepared at a high ratio by using cells derived from each marker positive cell, as compared to the use of cells derived from each marker negative cell.

[0095] From these results, it was shown that a cell population containing CD8 positive cells (e.g., CD4/CD8DP cell, CD8SP cell) at a high ratio can be prepared by separating cells expressing CD90, CD143, CD200, CD218a or CD263 as a cell population containing hematopoietic progenitor cells and differentiating the separated cells.

Example 3 (Consideration Using Ff-I01s04 Strain)

[0096] As a cell population containing hematopoietic progenitor cells (hereinafter sometimes referred to as HPC), a non-adherent cell population obtained by subjecting iPS cells (Ff-I01s04 strain) to the method described in Example 1 was used. The above-mentioned non-adherent cell population containing HPC was stained with the following antibody set for each sample group.

TABLE-US-00011 TABLE 11-1 fluorescence sample group molecule bonded (antibody set) antibody manufacturer to antibody 1c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD7 antibody Biolegend PE 2c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD144 antibody BD BV421 3c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD56 antibody Biolegend PE 4c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD226 antibody Biolegend PE 5c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD262 antibody Biolegend PE 6c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor78 0 anti-CD235a antibody BD FITC anti-CD325 antibody Biolegend PE 7c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD49f antibody Biolegend PE 8c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD51 antibody Biolegend PE

TABLE-US-00012 TABLE 11-2  9c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD102 antibody Biolegend PE 10c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD42b antibody Biolegend PE 11c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD61 antibody Biolegend PE 12c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD62P antibody Biolegend PE 13c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD69 antibody Biolegend PE 14c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD102 antibody Biolegend PE 15c anti-CD34 antibody Abcam PE-Cy7 anti-CD43 antibody BD APC anti-CD45 antibody Biolegend BV510 anti-CD14 antibody Biolegend APC/eFluor780 anti-CD235a antibody BD FITC anti-CD156c antibody Biolegend PE

[0097] The cell populations after the above-mentioned staining were subjected to sorting by FACSAria. The cell fractions obtained from each of the above-mentioned sample groups are shown below.

TABLE-US-00013 TABLE 12 sample group obtained cell fraction 1c fraction Ac and fraction Bc 2c fraction Cc 3c fraction Dc 4c fraction Ec 5c fraction Fc 6c fraction Gc 7c fraction Hc 8c fraction Ic 9c fraction Jc 10c  fraction Kc 11c  fraction Lc 12c  fraction Mc 13c  fraction Nc 14c  fraction Oc 15c  fraction Pc

[0098] In the above Table, fractions Ac-Pc respectively show the following.

[0099] fraction Ac: CD235a negative, CD14 negative, CD34 positive, CD43 positive

[0100] fraction Bc: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD7 positive

[0101] fraction Cc: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD144 positive

[0102] fraction Dc: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD56 positive

[0103] fraction Ec: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD226 positive

[0104] fraction Fc: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD262 positive

[0105] fraction Gc: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD325 positive

[0106] fraction Hc: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD49f positive

[0107] fraction Ic: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD51 positive

[0108] fraction Jc: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD102 positive

[0109] fraction Kc: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD42b positive

[0110] fraction Lc: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD61 positive

[0111] fraction Mc: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD62P positive

[0112] fraction Nc: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD69 positive

[0113] fraction Oc: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD102 positive

[0114] fraction Pc: CD235a negative, CD14 negative, CD34 positive, CD43 positive, CD156c positive

[0115] The cells contained in the above-mentioned fractions Ac-Pc were differentiated into lymphoid cells by the method described in Example 1. All cells were recovered on day 21 from the start of culturing, counted using a hemocytometer and stained using the following antibody set.

TABLE-US-00014 TABLE 13 fluorescence molecule antibody set manufacturer bonded to antibody anti-CD3 antibody Biolegend APC/Cy7 anti-CD45 antibody Biolegend Brilliant Violet 510 anti-TCRab antibody eBioscience FITC anti-CD8b antibody Beckman PE anti-CD7 antibody Biolegend APC anti-CD5 antibody eBioscience PE/Cy7 anti-CD8a antibody Biolegend PerCP/Cy5.5 anti-CD4 antibody Biolegend BV421

[0116] The cell populations after the above-mentioned staining were subjected to sorting by FACSAria. The cell fractions obtained by the above-mentioned sorting are shown below.

[0117] fraction Qc: lymphocyte fraction

[0118] fraction Rc: lymphocyte fraction, CD3 positive, CD45 positive, CD5 positive, CD7 positive

[0119] fraction Sc: lymphocyte fraction, CD3 positive, CD45 positive, CD7 positive, CD8a positive, CD4 positive

[0120] fraction Tc: lymphocyte fraction, CD3 positive, CD45 positive, CD7 positive, CD8a positive, CD4 negative

[0121] The number of cells of each sample derived from fractions Ac-Pc on day 21 from the start of culturing (ratio to the number of cells of sample derived from fraction Ac) is shown in Table 14.

TABLE-US-00015 TABLE 14 fraction fraction fraction fraction fraction fraction Ac Bc Cc Dc Ec Fc 1 3.1 3.5 1.2 2.0 3.9 fraction fraction fraction fraction fraction fraction Gc Hc Ic Jc Kc Lc 1.8 0 0.2 1.0 0.7 0.5 fraction fraction fraction fraction Mc Nc Oc Pc 0 0.1 1.0 0.2

[0122] From Table 14, it was found that all cell populations contained in the samples derived from fraction Bc (CD7 positive), fraction Cc (CD144 positive), fraction Dc (CD56 positive), fraction Ec (CD226 positive), fraction Fc (CD262 positive) and fraction Gc (CD325 positive) are superior in the proliferation potency as compared to the cell population in the sample derived from fraction Ac. In addition, it was found that the cell populations contained in the samples derived from fraction Hc (CD49f positive), fraction Ic (CD51 positive), fraction Kc (CD42b positive), fraction Lc (CD61 positive), fraction Mc (CD62P positive), fraction Nc (CD69 positive) and fraction Pc (CD156c positive) are inferior in the proliferation potency.

[0123] The number of cells of cell fractions Qc-Tc obtained by sorting by FACSAria on day 21 of culturing (ratio to the number of cells of cell fractions Qc-Tc in sample derived from fraction Ac) is shown in Table 15.

TABLE-US-00016 TABLE 15 fraction Qc fraction Rc fraction Sc fraction Tc derived from 3.3 3.7 3.1 2.6 fraction Bc derived from 3.8 4.3 7.0 2.4 fraction Cc derived from 1.3 1.4 2.2 0.9 fraction Dc derived from 0.9 1.0 1.7 0.7 fraction Ec derived from 4.1 4.7 6.5 2.9 fraction Fc derived from 2.1 2.4 3.1 1.7 fraction Gc derived from 0 0 0 0 fraction Hc derived from 0.2 0.1 0 0.2 fraction Ic derived from 1.2 0.7 0.3 0.6 fraction Jc derived from 0.8 0.7 0.3 0.8 fraction Kc derived from 0.3 0.3 0.5 0.3 fraction Lc derived from 0 0 0 0 fraction Mc derived from 0 0 0 0 fraction Nc derived from 1.2 0.7 0.3 0.6 fraction Oc derived from 0.1 0.1 0.1 0.1 fraction Pc

[0124] As a result, it was shown that a cell population containing CD3 positive CD45 positive CD7 positive CD8a positive CD4 positive cell, or CD3 positive CD45 positive CD7 positive CD8a positive CD4 negative cell at a high ratio can be prepared by using cells derived from fraction Bc, fraction Cc, fraction Dc, fraction Ec, fraction Fc or fraction Gc, as compared to the use of cells derived from fraction Ac. In addition, it was shown that a cell population containing CD3 positive CD45 positive CD7 positive CD8a positive CD4 positive cell, or CD3 positive CD45 positive CD7 positive CD8a positive CD4 negative cell at a low ratio can be prepared by using cells derived from fraction Hc, fraction Ic, fraction Jc, fraction Kc, fraction Lc, fraction Mc, fraction Nc, fraction Oc or fraction Pc, as compared to the use of cells derived from fraction Ac. That is, it was shown that a cell population containing CD4/CD8 double positive cells (or CD8 single positive cell) at a high ratio can be prepared by separating a cell expressing any one or more kinds of CD7, CD144, CD56, CD226, CD262 and CD325, or a cell not expressing any one or more kinds of CD49f, CD51, CD102, CD42b, CD61, CD62P, CD69, CD102 and CD156c as a cell population containing hematopoietic progenitor cells and differentiating the separated cells.

[0125] This application is based on a patent application No. 2017-087723 filed in Japan (filing date: Apr. 26, 2017), the contents of which are incorporated in full herein.

INDUSTRIAL APPLICABILITY

[0126] The present invention can provide more immature T cells and mature T cells and/or provide them at higher concentrations. The thus-obtained cells are useful for the prophylaxis or treatment of diseases such as tumor, infection, autoimmune disorder and the like.