Abstract:
:Therapeutic cloning, whereby somatic cell nuclear transfer (SCNT) is used to generate patient-specific embryonic stem cells (ESCs) from blastocysts cloned by nuclear transfer (ntESCs), holds great promise for the treatment of many human diseases. ntESCs have been derived in mice and cattle, but thus far there are no credible reports of human ntESCs. Here we review the recent literature on nuclear reprogramming by SCNT, including studies of gene expression, DNA methylation, chromatin remodeling, genomic imprinting and X chromosome inactivation. Reprogramming of genes expressed in the inner cell mass, from which ntESCs are derived, seems to be highly efficient. Defects in the extraembryonic lineage are probably the major cause of the low success rate of reproductive cloning but are not expected to affect the derivation of ntESCs. We remain optimistic that human therapeutic cloning is achievable and that the derivation of patient-specific ntESC lines will have great potential for regenerative medicine.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Yang X,Smith SL,Tian XC,Lewin HA,Renard JP,Wakayama Tdoi
10.1038/ng1973subject
Has Abstractpub_date
2007-03-01 00:00:00pages
295-302issue
3eissn
1061-4036issn
1546-1718pii
ng1973journal_volume
39pub_type
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