Method of preparing an undifferentiated cell
First Claim
1. A method comprising increasing the relative number of hematopoietic stem cells in a cell population including committed cells, wherein the method comprises contacting in vitro a cell population derived from unmobilized blood with an antibody that binds to MHC class II antigens, and enriching hematopoietic stem cells or recovering the hematopoietic stem cells from the cell population by using a cell surface marker, wherein the hematopoietic stem cells are MHC class I+ and/or MHC class II+ cells and wherein the hematopoietic stem cells are enriched or recovered from the cell population 2 hours after the cell population is first contacted with the antibody.
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Accused Products
Abstract
Disclosed is a method of preparing an undifferentiated cell. The method includes contacting a more committed cell with an agent that causes the more committed cell to retrodifferentiate into an undifferentiated cell.
9 Citations
24 Claims
- 1. A method comprising increasing the relative number of hematopoietic stem cells in a cell population including committed cells, wherein the method comprises contacting in vitro a cell population derived from unmobilized blood with an antibody that binds to MHC class II antigens, and enriching hematopoietic stem cells or recovering the hematopoietic stem cells from the cell population by using a cell surface marker, wherein the hematopoietic stem cells are MHC class I+ and/or MHC class II+ cells and wherein the hematopoietic stem cells are enriched or recovered from the cell population 2 hours after the cell population is first contacted with the antibody.
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8. A method comprising increasing the relative number of hematopoietic stem cells in a cell population including committed cells, wherein the method comprises contacting in vitro a cell population derived from unmobilized blood with an antibody that binds to MHC class II antigens, in conjunction with cyclophosphamide, wherein the hematopoietic stem cells are MHC class I+ and/or MHC class II+ cells.
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9. A method comprising increasing the relative number of hematopoietic stem cells in a cell population derived from unmobilized blood, which population includes committed cells, said hematopoietic stem cells being capable of being committed into more differentiated hematopoietic cells, which method comprises:
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(i) contacting in vivo and initial cell population comprising the committed cells with an antibody that binds to MHC class II antigens, (ii) culturing the cell population thereby producing an altered cell population comprising hematopoietic stem cells, and (iii) enriching said hematopoietic stem cells or recovering said hematopoietic stem cells from the altered cell population, wherein said hematopoietic stem cells are enriched or recovered from the altered cell population 2 hours after commencement of the incubation. - View Dependent Claims (10)
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11. A method comprising increasing the relative number of hematopoietic stem cells in a cell population including committed cells, wherein the method comprises contacting in vitro a cell population derived from unmobilized blood with an agent selected from the group consisting of (a) erythropoietin in combination with an antibody that binds to MHC class II antigens, and (b) GM-CSF in combination with an antibody that binds to MHC class II antigens, and enriching hematopoietic stem cells or recovering the hematopoietic stem cells from the cell population by using a cell surface marker,
wherein the hematopoietic stem cells are MHC class I+ and/or MHC class II+ cells, and wherein the hematopoietic stem cells are enriched or recovered from the cell population 2 hours after the cell population is first contacted with the agent.
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18. A method comprising increasing the relative number of hematopoietic stem cells in a cell population derived from unmobilized blood, which population includes committed cells, said hematopoietic stem cells being capable of being committed into more differentiated hematopoietic cells, which method comprises:
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(i) contacting in vivo and initial cell population comprising the committed cells with an agent selected from the group consisting of (a) erythropoietin in combination with an antibody that binds to MHC class II antigens, and (b) GM-CSF in combination with an antibody that binds to MHC class II antigens, (ii) culturing the cell population thereby producing an altered cell population comprising hematopoietic stem cells, and (iii) enriching said hematopoietic stem cells or recovering said hematopoietic stem cells from the altered cell population, wherein said hematopoietic stem cells are enriched or recovered from the altered cell population 2 hours after commencement of the incubation. - View Dependent Claims (19)
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24. A method comprising increasing the relative number of hematopoietic stem cells in a cell population including committed cells, wherein the method comprises contacting in vitro a cell population derived from unmobilized blood with an agent selected from the group consisting of (a) erythropoietin in combination with an antibody that binds to MHC class II antigens, and (b) GM-CSF in combination with an antibody that binds to MHC class II antigens, in conjunction with cyclophosphamide, wherein the hematopoietic stem cells are MHC class I+ and/or MHC class II+ cells.
Specification