Islet cell manufacturing compositions and methods of use
Disclosed herein are compositions and methods useful for manufacturing SC-β cell, and isolated populations of SC-β cells for use in various applications, such as cell therapy.
1. An in vitro method comprising contacting a population of Pdx1-negative primitive gut tube cells with a composition comprising a BMP signaling pathway inhibitor, wherein the BMP signaling pathway inhibitor is a compound of Formula A,
2. The method of claim 1 , wherein the composition further comprises a growth factor from the transformation growth factor β (TGF-β) superfamily.
3. The method of claim 2 , further comprising differentiating the population of primitive gut tube cells to generate a cell cluster comprising non-native pancreatic cells capable of having a glucose stimulated insulin secretion (GSIS) response.
4. The method of claim 3 , wherein the differentiating of the population of primitive gut tube cells generates a cell cluster that comprises a higher percentage of non-native pancreatic b cells capable of having a GSIS response as compared to a cell cluster differentiated from a comparable population of primitive gut tube cells without the contacting with the composition comprising the BMP signaling pathway inhibitor and the growth factor from the transformation growth factor β (TGF-β) superfamily.
5. The method of claim 3 , wherein the differentiating of the population of primitive gut tube cells generates a cell cluster that comprises non-native b pancreatic cells that has a higher glucose-stimulated insulin secretion (GSIS) stimulation index than a cell cluster comprising non-native pancreatic b cells differentiated from a comparable population of primitive gut tube cells without the BMP signaling pathway inhibitor or the growth factor from the transformation growth factor β (TGF-β) superfamily.
6. The method of claim 5 , wherein the GSIS stimulation index is calculated as a ratio of insulin secretion in response to a first glucose concentration to insulin secretion in response to a second glucose concentration, and wherein said first glucose concentration is about 10 to about 50 mM, and said second glucose concentration is about 1 mM to 5 mM.
7. The method of claim 6 , wherein the GSIS stimulation index of the cell cluster comprising non-native pancreatic β cells is at least about 3 fold higher than that of the cell cluster comprising non-native pancreatic β cells differentiated from the comparable population of primitive gut tube cells.
8. The method of claim 1 , further comprising differentiating the Pdx-1-positive pancreatic progenitor cells into a cell cluster comprising NKX6.1-positive pancreatic progenitor cells.
9. The method of claim 8 , wherein the cell cluster comprises at least 50% Pdx-1-positive, NKX6.1-positive cells as measured by flow cytometry.
10. The method of claim 8 , wherein the cell cluster comprising NKX6.1-positive pancreatic progenitor cells comprises at most 30% CHGA-positive cells as measured by flow cytometry.
11. The method of claim 8 , wherein the cell cluster comprising NKX6.1-positive pancreatic progenitor cells comprises at most 30% CDX2-positive cells as measured by flow cytometry.
12. The method of claim 8 , wherein the cell cluster comprising NKX6.1-positive pancreatic progenitor cells comprises at least 50% PDX1-positive, NKX6.1-positive pancreatic progenitor cells, at most 25% CDX2-positive, NKX6.1-positive cells, and at most 10% CHGA-positive cells, as measured by flow cytometry.
13. The method of claim 2 , wherein the growth factor from the transformation growth factor β (TGF-β) superfamily is selected from the group consisting of an Inhibin, an Activin, a Mullerian inhibiting substance (MIS), a bone morphogenic protein (BMP), decapentaplegic (dpp), Vg-1, monoclonal nonspecific suppressor factor (MNSF), growth differentiating factor 8 (GDF8), and growth differentiating factor 11 (GDFI 1).
14. The method of claim 2 , wherein the growth factor from the transformation growth factor β (TGF-β) superfamily comprises Activin A.
15. The method of claim 14 , wherein the composition comprises about 2 ng/mL to about 50 ng/mL of Activin A.
16. The method of claim 1 , wherein the composition comprises about 0.1 μM to about 0.3 μM of the BMP signaling inhibitor.
17. The method of claim 2 , further comprising contacting the primitive gut tube cells with keratinocyte growth factor (KGF), SANTI, retinoic acid, PdbU, and thiazovivin.