News Roundup [abridged Versions Appear In The Paper Journal]

Gene could give clue to cloning failures

BMJ 2002; 324 doi: (Published 25 May 2002) Cite this as: BMJ 2002;324:1236
  1. Scott Gottlieb
  1. New York

    Researchers believe they have discovered a crucial gene that explains why so few attempts to clone embryos are successful.

    Examining cloned mouse embryos, the researchers discovered that only a small number of embryos properly expressed the gene called Oct4, which is crucial for normal development (Genes and Development 2002;16:1189-93)

    “Basically, it's a miracle that cloning actually works,” said the study's lead author, Dr K John McLaughlin of the University of Pennsylvania.

    “In the mouse, after just four days of development, we can say that 99% of all clones are doomed to fail,” said Dr McLaughlin. …

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