PPL develops sheep carrying human genes

25 July 1997

PPL develops sheep carrying human genes

PPL Laboratories has developed the first cloned animal to carry human
genes. A sheep called Polly will produce human proteins in her milk.

It opens up the field for producing identical flocks of sheep or other
farmyard animals able to produce human proteins in their milk for
treating diseases. PPL has done this by adding a human gene plus a marker
gene to the genetic material or nucleus. The nucleus was then introduced
into sheeps eggs from which the DNA had been removed.

The company is working with the Roslin Institute, near Edinburgh,
which recently announced it had cloned Dolly the sheep.
Professor Grahame Bulfield, director of the Roslin Institute, said: This
pioneering work will stimulate new opportunities in both agricultural and
bio-medical research.

  • The Times 25/07/97 page 6
  • The Independent page 3
  • The Daily Telegraph page 9

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