Granted Patent
B2
US 12,241,084 · App. 18/449,971 · Granted Mar 4, 2025
Methods for efficient generation of GABAergic interneurons from pluripotent stem cells
Assignee:
The McLean Hospital Corporation
C12N5/0619A61K35/30C12N2501/115C12N2501/119C12N2501/13C12N2501/155C12N2501/41C12N2501/415C12N2506/02C12N2506/08C12N2506/45
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Abstract
Enhanced methods for the generation of medial ganglionic eminence (MGE) cells from pluripotent stem cells are provided that involve an additional step of contacting the cells with an activator of FGF8 signaling while differentiating Pax6+ cells progenitor cells into MGE cells with an activator of sonic hedgehog, and optionally a Wnt inhibitor. The activator of FGF8 signaling shifts the differentiation of the population of cells to NKX2.1+ MGE cells, rather than to CopuTFII+ caudal ganglionic eminence (CGE) cells. Methods for treatment of neurological disorders, such as epilepsy, by transplant of MGE cells, or GABAergic interneurons derived from human pluripotent stem cells, into a subject in need of treatment are also provided. Human pluripotent stem cell derived MGE cells when transplanted successfully suppress spontaneous seizures, e.g. in epilepsy. We also have developed a method to purify MGE cells and maturing interneurons from differentiated pluripotent stem cells using cell surface marker and molecular beacon technology.
Claims (34)
1. A method for treating temporal lobe epilepsy in a subject, the method comprising:
(a) providing a sample comprising pluripotent stem cells (PSCs) in culture;
(b) contacting the sample with:
(1) a Wnt inhibitor from day 0 to day 7 of culture;
(2) a SMAD inhibitor from day 0 to day 14 of culture;
(3) an activator of sonic hedgehog (SHH) from day 0 to day 21 of culture; and
(4) exogenous fibroblast growth factor 8 (FGF8) protein from day 8 to day 21 of culture, to thereby produce an isolated population of medial ganglionic eminence (MGE) cells;
(c) determining that one or more cells from the population of MGE cells expresses Sox6;
(d) administering to the subject an effective number of cells from the isolated population of Sox6 expressing MGE cells, thereby treating temporal lobe epilepsy in the subject.
2. The method of claim 1 , wherein the subject is diagnosed as having seizures.
3. The method of claim 1 , wherein the pluripotent stem cells are allogenic cells.
4. The method of claim 1 , wherein the cells are administered by transplantation.
5. The method of claim 1 , further comprising purifying the MGE cells by FACS sorting.
6. The method of claim 5 , further comprising purifying the MGE cells by applying to the cells a molecular probe against NKx2.1.
7. The method of claim 1 , wherein the MGE cells are further differentiated into GABAergic interneurons that express Lhx6 and Sox6 prior to administration to the subject.
8. The method of claim 7 , further comprising applying an antibody against PCPTP1 or CXCR4 to the GABAergic interneurons and FACS analysis.
9. A method for reducing seizure activity associated with temporal lobe epilepsy in a subject comprising:
(a) providing a sample comprising pluripotent stem cells (PSCs) in culture;
(b) contacting the sample with:
(1) a Wnt inhibitor from day 0 to day 7 of culture;
(2) a SMAD inhibitor from day 0 to day 14 of culture;
(3) an activator of sonic hedgehog (SHH) from day 0 to day 21 of culture; and
(4) exogenous fibroblast growth factor 8 (FGF8) protein from day 8 to day 21 of culture, to thereby produce an isolated population of medial ganglionic eminence (MGE) cells;
(c) determining that one or more cells from the population of MGE cells expresses Sox6;
(d) administering to the subject an effective number of cells from the isolated population of Sox6 expressing MGE cells, and
(e) determining one or more cells from the population of cells expresses Sox6, thereby reducing seizure activity in the subject.
10. The method of claim 9 , wherein the MGE cells are derived from embryonic pluripotent stem cells.
11. The method of claim 9 , wherein the pluripotent stem cells are allogenic cells.
12. The method of claim 9 , wherein the MGE cells are further differentiated into GABAergic interneurons that express Lhx6 and Sox6 prior to administration to the subject.
13. The method of claim 12 , further comprising applying an antibody against PCPTP1 or CXCR4 to the GABAergic interneurons and FACS analysis.
14. The method of claim 9 , wherein the cells are administered by transplantation.
15. The method of claim 9 , further comprising purifying the MGE cells by FACS sorting.
16. The method of claim 15 , further comprising purifying the MGE cells by applying to the cells a molecular probe against NKx2.1.
17. The method of claim 16 , wherein the molecular probe has a nucleotide sequence selected from the group consisting of: SEQ ID NO: 34, SEQ ID NO: 35, SEQ ID NO: 36, SEQ ID NO: 37, SEQ ID NO: 38, SEQ ID NO: 39, SEQ ID NO: 40, SEQ ID NO: 41; and SEQ ID NO: 42.
Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Oct 16, 2023
From: CHUNG, SANGMI
To: THE MCLEAN HOSPITAL CORPORATION
Reel/Frame 065223/0951 →
Continuity (4)
Division
15034699
Provisional Application
62053535
· Sep 22, 2014
Provisional Application
61901541
· Nov 8, 2013
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