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Theriogenology. 2000 Jan 1;53(1):117-26.

New advances in somatic cell nuclear transfer: application in transgenesis.

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PPL Therapeutics Inc., Blacksburg, Virginia 24060, USA.


The ability to produce live offspring by nuclear transfer from cultured somatic cells provides a route for the precise genetic manipulation of large animal species. Such modifications include the addition, or "knock-in", and the removal or inactivation, "knock-out", of genes or their control sequences. This paper will review some of the factors which affect the development of embryos produced by nuclear transfer, the advantages of using cultured cells as donors of genetic material, and methods that have been developed to enrich gene targeting frequency. Commercial applications of this technology in biomedicine and agriculture will also be addressed.

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