Method of producing erythrocytes without feeder cells
First Claim
1. A method of producing erythrocytes, comprising expanding a population of human hematopoietic cells in a medium in the absence of feeder cells and in contact with one or more factors, wherein a plurality of human hematopoietic cells within said population of human hematopoietic cells differentiate into erythrocytes during said expanding;
- and isolating said erythrocytes from said medium,wherein said factors comprise SCF at a concentration of about 10 to about 10,000 ng/mL, IL-3 at a concentration of about 0.01 to about 500 ng/mL, and Epo at a concentration of about 0.1 to about 10 IU/mL,wherein said medium comprises insulin-like growth factor 1 (IGF-1) at a concentration of about 1 to about 1000 ng/mL,wherein said medium does not comprise one or more of Flt-3L, IL-11, thrombopoietin (Tpo), homeobox-B4 (HoxB4), or methylcellulose, andwherein said SCF, IL-3 and Epo are not comprised within an undefined component of said medium.
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Accused Products
Abstract
Provided herein are methods of producing erythrocytes from hematopoietic cells, particularly hematopoietic cells from placental perfusate in combination with hematopoietic cells from umbilical cord blood, wherein the method results in accelerated expansion and differentiation of the hematopoietic cells to more efficiently produce administrable erythrocytes. Further provided herein is a bioreactor in which hematopoietic cell expansion and differentiation takes place.
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Citations
14 Claims
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1. A method of producing erythrocytes, comprising expanding a population of human hematopoietic cells in a medium in the absence of feeder cells and in contact with one or more factors, wherein a plurality of human hematopoietic cells within said population of human hematopoietic cells differentiate into erythrocytes during said expanding;
- and isolating said erythrocytes from said medium,
wherein said factors comprise SCF at a concentration of about 10 to about 10,000 ng/mL, IL-3 at a concentration of about 0.01 to about 500 ng/mL, and Epo at a concentration of about 0.1 to about 10 IU/mL, wherein said medium comprises insulin-like growth factor 1 (IGF-1) at a concentration of about 1 to about 1000 ng/mL, wherein said medium does not comprise one or more of Flt-3L, IL-11, thrombopoietin (Tpo), homeobox-B4 (HoxB4), or methylcellulose, and wherein said SCF, IL-3 and Epo are not comprised within an undefined component of said medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- and isolating said erythrocytes from said medium,
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12. A method of producing erythrocytes, comprising expanding a population of human hematopoietic cells in a medium in the absence of feeder cells, wherein a plurality of human hematopoietic cells within said population of human hematopoietic cells differentiate into erythrocytes during said expanding;
- and isolating said erythrocytes from said medium,
wherein said medium comprises about 100 ng/mL SCF, about 3 IU/mL Epo, about 40 ng/mL IGF-1, about 1 μ
M dexamethasone, about 40 μ
g/ml lipids, and about 5 ng/mL IL-3,wherein said medium does not comprise one or more of Flt-3L, IL-11, thrombopoietin (Tpo), homeobox-B4 (HoxB4), or methylcellulose, and wherein said SCF, IL-3 and Epo are not comprised within an undefined component of said medium.
- and isolating said erythrocytes from said medium,
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13. A method of producing erythrocytes, comprising expanding a population of human hematopoietic cells in a medium in the absence of feeder cells, wherein a plurality of human hematopoietic cells within said population of human hematopoietic cells differentiate into erythrocytes during said expanding;
- and isolating said erythrocytes from said medium,
wherein said medium comprises about 100 ng/mL SCF, about 3 IU/mL Epo, about 40 ng/mL IGF-1, about 1 μ
M hydrocortisone, about 40 μ
g/mL lipids, and about 5 ng/mL IL-3,wherein said medium does not comprise one or more of Flt-3L, IL-11, thrombopoietin (Tpo), homeobox-B4 (HoxB4), or methylcellulose, and wherein said SCF, IL-3 and Epo are not comprised within an undefined component of said medium.
- and isolating said erythrocytes from said medium,
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14. A method of producing erythrocytes, comprising expanding a population of human hematopoietic cells in a medium in the absence of feeder cells, wherein a plurality of human hematopoietic cells within said population of human hematopoietic cells differentiate into erythrocytes during said expanding;
- and isolating said erythrocytes from said medium,
wherein said medium comprises about 10 to about 10,000 ng/mL SCF, about 0.01 to about 500 ng/mL IL-3, about 0.1 to about 10 IU/mL Epo, about 40 ng/mL IGF-1, about 1 μ
M dexamethasone, and about 40 μ
g/mL lipids,wherein said medium does not comprise one or more of Flt-3L, IL-11, thrombopoietin (Tpo), homeobox-B4 (HoxB4), or methylcellulose, and wherein said SCF, IL-3 and Epo are not comprised within an undefined component of said medium.
- and isolating said erythrocytes from said medium,
Specification