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TECHNOLOGY DEVELOPMENT: CONCISE REVIEW |
aNeuronal Survival Unit, Department of Experimental Medical Science, Wallenberg Neuroscience Centre, Lund University, Lund, Sweden;
bCellular Reprogramming Laboratory, Centro de Investigacion Principe Felipe, Valencia, Spain
Key Words. Clinical stem cell transplantation • Reprogramming • Human embryonic stem cells • Cloning
Correspondence: Vanessa Hall, Ph.D.,Neuronal Survival Unit, Department of Experimental Medical Science, Wallenberg Neuroscience Centre, Department of Physiological Sciences, Lund University, BMC A10, Lund, Sweden. Telephone: +46 (0) 46-222-0526; Fax: +46 (0) 46-222-0531; email: Vanessa.Hall{at}med.lu.se
Received November 26, 2005;
accepted for publication March 17, 2006.
First published online in STEM CELLS EXPRESS March 23, 2006.
The development and transplantation of autologous cells derived from nuclear transfer embryonic stem cell (NT-ESC) lines to treat patients suffering from disease has been termed therapeutic cloning. Human NT is still a developing field, with further research required to improve somatic cell NT and human embryonic stem cell differentiation to deliver safe and effective cell replacement therapies. Furthermore, the implications of transferring mitochondrial heteroplasmic cells, which may harbor aberrant epigenetic gene expression profiles, are of concern. The production of human NT-ESC lines also remains plagued by ethical dilemmas, societal concerns, and controversies. Recently, a number of alternate therapeutic strategies have been proposed to circumvent the moral implications surrounding human nuclear transfer. It will be critical to overcome these biological, legislative, and moral restraints to maximize the potential of this therapeutic strategy and to alleviate human disease.
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