While the ethical and political debates rage over stem cells from human embryos, scientists continue to discover how those cells work and what they can do.
About 2 weeks before President Bush made his decision to fund certain kinds of stem cell research (SN: 8/18/01, p. 105), investigators from Johns Hopkins University in Baltimore reported at a meeting that injections of human embryonic stem cells restored some mobility to paralyzed rodents. The damage to the spinal cord, which the researchers cause by injecting a virus into the animals, mimics amyotrophic lateral sclerosis, also known as Lou Gehrig's disease. Although the research has not been published in a scientific journal, several lawmakers on Capitol Hill viewed videotape of once-paralyzed rodents walking after the treatment. Congress is now considering how to regulate stem cell research.
Meanwhile, an Israeli research team has further demonstrated the flexibility of human embryonic stem cells by converting them