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Stem Cell Related Patent Number US6787353

Title:Lineage-restricted neuronal precursors and methods of isolation
Inventors:Rao, Mahendra S.; Salt Lake City, UT, USA
Mayer-Proschel, Margot; Sandy, UT, USA
Kalyani, Anjali J.; Salt Lake City, UT, USA
Summary:This invention introduces an isolated pure population of mammalian central nervous system neuron-restricted precursor cells, methods and uses thereof. The isolated pure population of rodent or human CNS cells have been identified at day 13.5 of embryonic development, and are described as being lineage restricted, capable of undergoing self-renewal, and capable of differentiating into neurons. Methods and materials of isolation and analysis are disclosed, as are therapeutic applications in the treatment of neurological diseases.
Abstract:A self-renewing restricted stem cell population has been identified in developing (embryonic day 13.5) spinal cords that can differentiate into multiple neuronal phenotypes, but cannot differentiate into glial phenotypes. This neuronal-restricted precursor (NRP) expresses highly polysialated or embryonic neural cell adhesion molecule (E-NCAM) and is morphologically distinct from neuroepithelial stem cells (NEP cells) and spinal glial progenitors derived from embryonic day 10.5 spinal cord. NRP cells self renew over multiple passages in the presence of fibroblast growth factor (FGF) and neurotrophin 3 (NT-3) and express a characteristic subset of neuronal epitopes. When cultured in the presence of RA and the absence of FGF, NRP cells differentiate into GABAergic, glutaminergic, and cholinergic immunoreactive neurons. NRP cells can also be generated from multipotent NEP cells cultured from embryonic day 10.5 neural tubes. Clonal analysis shows that E-NCAM immunoreactive NRP cells arise from an NEP progenitor cell that generates other restricted CNS precursors. The NEP-derived E-NCAM immunoreactive cells undergo self renewal in defined medium and differentiate into multiple neuronal phenotypes in mass and clonal culture. Thus, a direct lineal relationship exists between multipotential NEP cells and more restricted neuronal precursor cells present in vivo at embryonic day 13.5 in the spinal cord. Methods for treating neurological diseases are also disclosed.
US Patent Website:Click Here for Full Text of Patent
Title Number:US6787353
Application Number:US1998000109858
Date Filed:02/07/1998
Date Published:07/09/2004
Assignee:University of Utah Research Foundation, Salt Lake City, UT, USA

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