US5672499A
Expired / Lapsed
US
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Immoralized neural crest stem cells and methods of making
Assignee: California Institute of Technology
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Filing: 1995-06-07
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Granted: 1997-09-30
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Expires: 2015-06-07
Abstract
Abstract The invention includes mammalian multipotent neural stem cells and their progeny and methods for the isolation and clonal propagation of such cells. At the clonal level the stem cells are capable of self regeneration and asymmetrical division. Lineage restriction is demonstrated within developing clones which are sensitive to the local environment. The invention also includes such cells which are transfected with foreign nucleic acid, e.g., to produce an immortalized neural stem cell. The invention further includes transplantation assays which allow for the identification of mammalian multipotent neural stem cells from various tissues and methods for transplanting mammalian neural stem cells and/or neural or glial progenitors into mammals. A novel method for detecting antibodies to neural cell surface markers is disclosed as well as a monoclonal antibody to mouse LNGFR.
Inventors
- 👤 David J. Anderson
- 👤 Derek L. Stemple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:22
CPC Classifications
C; C07; C07K; C07K16/00; C07K16/18; C07K16/28; C07K16/2863; C12; C12N; C12N5/00; C12N5/06; C12N5/0602; C12N5/0618; C12N5/0623; C12N2500/00; C12N2500/05; C12N2500/10; C12N2500/20; C12N2500/24; C12N2500/25; C12N2500/30; C12N2500/35; C12N2500/38; C12N2500/46; C12N2500/70; C12N2500/80; C12N2500/90; C12N2501/00; C12N2501/02; C12N2501/10; C12N2501/11; C12N2501/30; C12N2501/38; C12N2501/385; C12N2501/39; C12N2501/392; C12N2501/395; C12N2501/85; C12N2501/86; C12N2510/00; C12N2533/00; C12N2533/30; C12N2533/32; C12N2533/50; C12N2533/52; C12N2533/56
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
133 words
A method for immortalizing isolated neural crest stem cells comprising contacting said isolated neural crest stem cells with an immortalization gene under conditions permissive for the uptake of said immortalization gene into said cells, wherein said isolated neural crest stem cells are capable of self-renewal in a feeder cell-independent culture medium, express low-affinity nerve growth factor receptor (LNGFR) and nestin, but do not express neuronal or glial lineage markers including glial fibrillary acidic protein (GFAP), wherein at least one of said stem cells is capable of differentiation to a peripheral nervous system (PNS) neuronal cell that does not express LNGFR or nestin but does express neurofilament-160, and wherein at least one of said isolated neural crest stem cells is capable of differentiation to a PNS glial cell that expresses LNGFR, nestin and GFAP.
Claim 2
Independent Claim
133 words
A method for immortalizing isolated neural crest stem cells comprising contacting said isolated neural crest stem cells with an immortalization gene under conditions permissive for the uptake of said immortalization gene into said cells, wherein said isolated neural crest stem cells are capable of self-renewal in a feeder cell-independent culture medium, express low-affinity nerve growth factor receptor (LNGFR) and nestin, but do not express neuronal or glial lineage markers including glial fibrillary acidic protein (GFAP), wherein at least one of said stem cells is capable of differentiation to a peripheral nervous system (PNS) neuronal cell that does not express LNGFR or nestin but does express neurofilament-160, and wherein at least one of said isolated neural crest stem cells is capable of differentiation to a PNS glial cell that expresses LNGFR, nestin and GFAP.
Claim 3
Dependent Claim
12 words
An immortalized cell line made according to the method of claim 1.
Claim 4
Dependent Claim
21 words
The method according to claim 1 wherein said conditions permissive for the uptake of said immortalization gene comprise calcium phosphate-mediated transfection.
Claim 5
Dependent Claim
20 words
The method according to claim 1, wherein said conditions permissive for the uptake of said immortalization gene comprise retroviral infection.
Claim 6
Dependent Claim
35 words
The method according to claim 1 wherein said immortalizing gene is selected from the group consisting of v-myc, N-myc, SV40T antigen, Ewing's sarcoma oncogene, bcr-abl, neurofibromin, neu, ret, mutant p53, mutant Rb, Notch dominant negative.
Claim 7
Dependent Claim
12 words
The method according to claim 5 wherein said immortalizing gene is v-myc.
Claim 8
Dependent Claim
19 words
The method according to claim 1 wherein said isolated neural crest stem cells are isolated from the neural crest.
Claim 9
Dependent Claim
34 words
The method according to claim 1 wherein said isolated neural crest stem cells do not express sulfatide, myelin protein P o , peripherin, high polysialic acid neural cell adhesion molecule (high PSA-NCAM) or neurofilament.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-09-29 | 2001-03-31 | 2001-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-29 | 2005-03-31 | 2005-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-29 | 2009-03-31 | 2009-09-30 | $7700.00 | Window Closed / Lapsed |