Dosing regimens for the mobilization of hematopoietic stem cells
Described herein are compositions and methods useful for mobilizing populations of hematopoietic stem and progenitor cells within a subject, as well as for determining whether samples of mobilized cells are suitable for release for ex vivo expansion and/or therapeutic use. In accordance with the composition and methods described herein, mobilized hematopoietic stem and progenitor cells can be withdrawn from a donor and administered to a patient for the treatment of various disorders, including hematopoietic diseases, metabolic disorders, cancers, and autoimmune diseases, among others.
1. A method of mobilizing a population of hematopoietic stem cells from the bone marrow of a human donor into peripheral blood, the method comprising administering to the donor (i) Gro-β T at a dose of about 150 μg/kg, wherein the Gro-β T is administered intravenously to the donor and (ii) 240 μg/kg plerixafor or a pharmaceutically acceptable salt thereof, wherein the plerixafor or pharmaceutically acceptable salt thereof is administered subcutaneously to the donor.
2. The method of claim 1 , wherein the method produces a population of cells having a ratio of CD34+ cells to leukocytes of from 0.0008 to 0.0021 in a sample of peripheral blood of the donor following administration of the Gro-β T and plerixafor or pharmaceutically acceptable salt thereof; or wherein the method enriches the peripheral blood of the donor with CD34+ cells relative to leukocytes by a ratio of from 3.4:1 to 6.9:1 as assessed by comparing a sample of peripheral blood of the donor following administration of the Gro-β T and plerixafor or pharmaceutically acceptable salt thereof to a sample of peripheral blood of the donor prior to administration of the Gro-β T and plerixafor or pharmaceutically acceptable salt thereof.
3. The method of claim 1 , wherein the method produces a population of cells having a ratio of CD34+ cells to neutrophils of from 0.0018 to 0.0058 in a sample of peripheral blood of the donor following administration of the Gro-β T and plerixafor or pharmaceutically acceptable salt thereof; or wherein the method enriches the peripheral blood of the donor with CD34+ cells relative to neutrophils by a ratio of from 2.1:1 to 8.1:1 as assessed by comparing a sample of peripheral blood of the donor following administration of the Gro-β T and plerixafor or pharmaceutically acceptable salt thereof to a sample of peripheral blood of the donor prior to administration of the Gro-β T and plerixafor or pharmaceutically acceptable salt thereof.
4. The method of claim 1 , further comprising isolating the hematopoietic stem cells or progeny thereof by drawing peripheral blood from the donor.
5. The method of claim 1 , further comprising using apheresis to collect the hematopoietic stem cells or progeny thereof from the donor.
6. The method of claim 1 , wherein the Gro-β T has a purity of at least 95% relative to deamidated versions of Gro-β T.
7. The method of claim 1 , wherein the human donor has a disease wherein administration of G-CSF is contraindicated.
8. The method of claim 1 , wherein the method does not comprise administering G-CSF to the donor.
9. A method of mobilizing a population of hematopoietic stem cells from the bone marrow of a human donor into peripheral blood, the method comprising administering to the donor (i) Gro-β T at a dose of about 150 μg/kg, wherein the Gro-β T is administered intravenously to the donor and (ii) 240 μg/kg plerixafor or a pharmaceutically acceptable salt thereof, wherein the plerixafor or a pharmaceutically acceptable salt thereof is administered subcutaneously to the donor, and wherein the method does not comprise administering G-CSF to the donor.