Mahendra S. Rao, head of the stem cell group at the National Institute on Aging (NIA), has resigned his government post to join Invitrogen Corp, saying the US ban on federal funding of new embryonic stem (ES) cell lines posed a formidable barrier to his research goals. The move prompted speculation about the future of the US ES cell research, with some making dire predictions."It is very disappointing when any scientist feels that they must leave the NIH because of politically driven restrictions on important medical research," Lawrence Goldstein at the University of California, San Diego, School of Medicine, told The Scientist. "It bodes ill for our country's leadership in important areas of scientific research and sends a very negative message to scientists and to patients who depend upon our scientists to make progress on new understanding and treatments for terrible diseases."As vice president of research for...

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