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Animal Eggs Not Suitable Substitutes to Produce Stem Cells
Date:2/2/2009

et al. show for the first time that human oocytes have the capacity to change these patterns of gene expression, and that interspecies (human-to-animal) cloning does not produce the same results. Although the human-bovine and human-rabbit clones looked similar to the human-human embryos, the human-animal hybrids did not exhibit the changes in gene expression seen in the human-human clones and normal embryos. Specifically, they did not achieve up-regulation of critical pluripotency-associated genes needed for stem cell production.

"This very important paper suggests that livestock oocytes are extremely unlikely to be suitable as recipients for use in human nuclear transfer. This is very disappointing because it would mean that production of patient-specific stem cells by this means would be impracticable,"

says Ian Wilmut, Ph.D., Editor-in-Chief of Cloning and Stem Cells and director of the Centre for Regenerative Medicine, in Edinburgh.

Cloning and Stem Cells is an authoritative peer-reviewed journal published quarterly in print and online that focuses on understanding developmental plasticity and defining the molecular mechanisms that regulate differentiation or dedifferentiation of nuclei and cells. Tables of contents and a free sample issue may be viewed online at www.liebertpub.com/clo

Mary Ann Liebert, Inc., is a privately held, fully integrated media company known for establishing authoritative peer-reviewed journals in many promising areas of science and biomedical research, including Human Gene Therapy, Stem Cells and Development, and Tissue Engineering. Its biotechnology trade magazine, Genetic Engineering and Biotechnology News (GEN), was the first in its field and is today the industry's most widely read publication worldwide. A complete list of the firm's 60 journals, b
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SOURCE Mary Ann Liebert, Inc.
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