1.   But that is changing, now that biotech firms are using surgery to implant genetically engineered cells that the agency classifies as drugs.

2.   Culver said the idea was to use thymidine kinase as a way to destroy the genetically engineered cells if the ADA experiment went awry.

3.   If no harm is detected, six more patients will receive the engineered cells in both sides of the brain.

4.   In an interview, Stice added that the group had now produced four additional live calves from genetically engineered fetal cells.

5.   Scientists could clone animals from those cells by replacing the nucleus of an egg with the nucleus from the genetically engineered cell.

6.   The researchers would then make cloned pigs from these genetically engineered cells.

7.   They hoped that the engineered cells, when implanted into the rats, would secrete the growth factor into surrounding tissues.

8.   This time the clones are Holstein calves, created from genetically engineered fetal cells.

9.   Tuszynski said that a second patient will receive genetically engineered cells in three months, again on one side of the brain.

10.   In control mice, which had the engineered cells but were not given the oral drug, insulin did not appear in the bloodstream and glucose levels stayed high.