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Vertebrate reproductive science and technology
RESEARCH ARTICLE

Human embryonic stem cells: challenges and opportunities

Steven L. Stice A C , Nolan L. Boyd A , Sujoy K. Dhara A , Brian A. Gerwe A , David W. Machacek A and Soojung Shin B
+ Author Affiliations
- Author Affiliations

A Regenerative Bioscience Center, ADS Department, University of Georgia, Athens, GA 30606, USA.

B Invitrogen Corporation, Carlsbad, CA 92008, USA.

C Corresponding author. Email: sstice@arches.uga.edu

Reproduction, Fertility and Development 18(8) 839-846 https://doi.org/10.1071/RD06113
Submitted: 24 April 2006  Accepted: 4 September 2006   Published: 22 November 2006

Abstract

Human and non-human primate embryonic stem (ES) cells are invaluable resources for developmental studies, pharmaceutical research and a better understanding of human disease and replacement therapies. In 1998, subsequent to the establishment of the first monkey ES cell line in 1995, the first human ES cell line was developed. Later, three of the National Institute of Health (NIH) lines (BG01, BG02 and BG03) were derived from embryos that would have been discarded because of their poor quality. A major challenge to research in this area is maintaining the unique characteristics and a normal karyotype in the NIH-registered human ES cell lines. A normal karyotype can be maintained under certain culture conditions. In addition, a major goal in stem cell research is to direct ES cells towards a limited cell fate, with research progressing towards the derivation of a variety of cell types. We and others have built on findings in vertebrate (frog, chicken and mouse) neural development and from mouse ES cell research to derive neural stem cells from human ES cells. We have directed these derived human neural stem cells to differentiate into motoneurons using a combination of developmental cues (growth factors) that are spatially and temporally defined. These and other human ES cell derivatives will be used to screen new compounds and develop innovative cell therapies for degenerative diseases.

Extra keywords: culture, karyotype, neural differentiation.


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