COMPOSITIONS AND METHODS FOR PROMOTING BETA CELL MATURITY

• US 20120141436A1
• Filed: 05/21/2010
• Published: 06/07/2012
• Est. Priority Date: 05/21/2009
• Status: Active Grant

• Current Assignee: Joslin Diabetes Center Inc.
• Original Assignee: Joslin Diabetes Center Inc.
• Inventors: Bonner-Weir, Susan, Sharma, Arun, Aguayo-Mazzucato, Cristina
• Granted Patent: US 9,328,331 B2
• Time in Patent Office: Days
• US Class Current: 424/93.7
• CPC Class Codes: A61P 3/10 for hyperglycaemia, e.g. antidiabetics
• CPC Class Codes: C07K 14/62 Insulins
• CPC Class Codes: C12N 2501/395 Thyroid hormones
• CPC Class Codes: C12N 5/0676 Pancreatic cells

Abstract

Compositions and methods for providing an enriched population of mature, glucose-responsive insulin secreting cells, and for modulating insulin expression, activity and secretion in a subject.

Claims

1. A method for providing an enriched population of mature, glucose-responsive insulin secreting cells, the method comprising:

providing an initial population of insulin-expressing immature beta cells, wherein the cells do not substantially secrete insulin in response to glucose; and

contacting the initial population of immature beta cells with triiodothyronine (T3) thyroid hormone or an analog thereof under conditions and for a time sufficient to induce maturation of at least some of the cells into mature cells that secrete insulin in the presence of glucose,

hereby providing an enriched population of mature, glucose-responsive insulin secreting cells.

3. The method of claim 1 or 2, wherein the initial population of insulin-expressing cells is provided by a method comprising:

providing a stem cell or a beta cell progenitor; and

differentiating the stem cell or progenitor cell into a population comprising insulin-expressing cells.

6. The method of claim 3, wherein the stem cell or β

cell progenitor is an iPS cell or embryonic stem cell.

2. A method for providing an enriched population of mature, glucose-responsive insulin secreting cells, the method comprising:

providing an initial population of insulin-expressing immature beta cells, wherein the cells secrete a first level of insulin in the presence of glucose;

contacting the initial population of cells with triiodothyronine (T3) thyroid hormone or an analog thereof under conditions and for a time sufficient to induce maturation of at least some of the cells into mature cells that secrete a second level of insulin in the presence of glucose, wherein the second insulin level is greater than the first level,

thereby providing an enriched population of mature, glucose-responsive insulin secreting cells.

4. The method of claim 2, wherein the initial population of insulin-expressing cells secretes substantially no insulin in a glucose responsive manner.

5. The method of claim 2, wherein the initial population of insulin-expressing immature beta cells secretes substantially less insulin in a glucose responsive manner than is secreted by a comparable population of mature beta cells.

7. The method of claim 2, wherein the initial population of insulin-expressing cells expresses insulin, but does not substantially express MafA.

8. The method of claim 2, wherein the initial population of insulin-expressing cells is an enriched population of immature beta cells.

9. The method of claim 2, wherein the analog of T3 is selected from the group consisting of T4 thyroid hormone, thyromimetics, TRbeta selective agonist-GC-1, GC-24,4-Hydroxy-PCB 106, MB07811, MB07344,3,5-diiodothyropropionic acid (DITPA);

GC-1;

3-Iodothyronamine (T(1)AM) and 3,3′

,5-triiodothyroacetic acid (Triac);

KB-2115 and KB-141;

thyronamines;

SKF L-94901;

DIBIT;

3′

-AC-T2;

tetraiodothyroacetic acid (Tetrac) and triiodothyroacetic acid (Triac), 3,3′

,5′

-triiodothyronine (rT3), 3,3′

-diiodothyronine (3,3′

-T2), 3,5-diiodothyronine (T2), 3-iodothyronamine (T1AM) and thyronamine (T0AM), 3,5,3′

-triiodothyropropionic acid (Triprop), 3,5-dibromo-3-pyridazinone-1-thyronine (L-940901), N-[3,5-dimethyl-4-(4′

-hydroxy-3′

-isopropylphenoxy)-phenyl]-oxamic acid (CGS

     23425), 3,5-dimethyl-4 [(4′

-hydroxy-3′

-isopropylbenzyl)-phenoxy]acetic acid (GC-1), 3,5-dichloro-4[(4-hydroxy-3-isopropylphenoxy)phenyl]acetic acid (KB-141), and 3,5-diiodothyropropionic acid (DITPA).

10. The method of claim 2, wherein the initial population of insulin-expressing cells express one or more, two or more, three or more, or all four of MMP2, CK19, SPD, and Frizzled 2.

11. A method of treating or reducing the risk of developing diabetes in a subject, the method comprising:

administering to a subject an enriched population of mature, glucose-responsive insulin secreting cells produced by the method of claim 2.