Motoneurons Derived from Embryonic Stem Cells Express Transcription Factors and Develop Phenotypes Characteristic of Medial Motor Column Neurons.
From: Department of Anatomy and Neurobiology, Dalhousie University, Halifax, Nova Scotia, B3H 1X5, Canada.
The Journal of neuroscience : the official journal of the Society for Neuroscience
- Publish Date: Mar 2006
- ISSN: 1529-2401
- Volume: 26
- Issue: 12
- Pages: 3256-68
- Medium: Internet
- Language: English
- Citation (JAMA): Soundararajan Prabakaran, Miles Gareth B, Rubin Lee L, et al. Motoneurons Derived from Embryonic Stem Cells Express Transcription Factors and Develop Phenotypes Characteristic of Medial Motor Column Neurons.. J. Neurosci. Mar 2006;26:3256-68
Abstract
Embryonic stem (ES) cells differentiate into functional motoneurons when treated with a sonic hedgehog (Shh) agonist and retinoic acid (RA). Whether ES cells can be directed to differentiate into specific subtypes of motoneurons is unknown. We treated embryoid bodies generated from HBG3 ES cells with a Shh agonist and RA for 5 d in culture to induce motoneuron differentiation. Enhanced green fluorescent protein (eGFP) expression was used to identify putative motoneurons, because eGFP is expressed under the control of the Hb9 promoter in HBG3 cells. We found that 96 +/- 0.7% of the differentiated eGFP+ motoneurons expressed Lhx3, a homeobox gene expressed by postmitotic motoneurons in the medial motor column (MMCm), when the treated cells were plated on a neurite-promoting substrate for 5 d. When the treated embryoid bodies were transplanted into stage 17 chick neural tubes, the eGFP+ motoneurons migrated to the MMCm, expressed Lhx3, projected axons to the appropriate target for MMCm motoneurons (i.e., epaxial muscles), and contained synaptic vesicles within intramuscular axonal branches. In ovo and in vitro studies indicated that chemotropic factors emanating from the epaxial muscle and/or surrounding mesenchyme likely guide Lhx3+ motoneurons to their correct target. Finally, whole-cell patch-clamp recordings of transplanted ES cell-derived motoneurons demonstrated that they received synaptic input, elicited repetitive trains of action potentials, and developed passive membrane properties that were similar to host MMCm motoneurons. These results indicate that ES cells can be directed to form subtypes of neurons with specific phenotypic properties.
Mesh Headings (Keywords): Action Potentials, Animals, Body Patterning, Cell Differentiation, Cell Movement, Cells, Cultured, Chemotactic Factors, Chick Embryo, Gene Expression Regulation, Developmental, Graft Survival, Green Fluorescent Proteins, Growth Cones, Hedgehog Proteins, Homeodomain Proteins, Motor Neurons, Muscle, Skeletal, Neuromuscular Junction, Patch-Clamp Techniques, Phenotype, Pluripotent Stem Cells, Spinal Cord, Stem Cell Transplantation, Trans-Activators, Transcription Factors, Tretinoin
Check for Full Text / PubMed Unique Identifier (PMID): 16554476
This abstract is part of PubMed, a service of the U.S. National Library of Medicine. PubMed includes more than 17 million citations from MEDLINE and other life science journals for biomedical articles. See Copyright and Disclaimers.
Linked medical terms appearing on this page are added by Healia to help readers find more information and are not part of the original PubMed document.
The data herein was last updated on July 8th, 2008 and may not reflect the most current and accurate data available from NLM.