Scientists receive license to clone human embryos

? The British government Tuesday gave the creator of Dolly the Sheep a license to clone human embryos for medical research into the cause of motor neuron disease.

Ian Wilmut, who led the team that created Dolly at Scotland’s Roslin Institute in 1996, and motor neuron expert Christopher Shaw of the Institute of Psychiatry in London, plan to clone embyros to study how nerve cells go awry to cause the disease. The experiments do not involve creating cloned babies.

It is the second such license approved since Britain became the first country to legalize research cloning in 2001. The first was granted in August to a team that hopes to use cloning to create insulin-producing cells that could be transplanted into diabetics.

While the latest project would not use the stem cells to correct the disease, the study of the cells is expected to help scientists develop future treatments, according to the Human Fertilization and Embryology Authority, which regulates such research and approved the license.

Such work, called therapeutic cloning because it does not result in a baby, is opposed by abortion foes and other biological conservatives because researchers destroy human embryos to harvest the cells.

Wilmut and Shaw plan to clone cells from patients with the incurable muscle-wasting disease, derive blank-slate stem cells from the cloned embryo, make them develop into nerve cells, and compare their development to nerve cells derived from healthy embryos.

The technique, called cell nuclear replacement, was also used to create Dolly.