Latest Issue of Science News


Eggs and more grown from mouse stem cells

In a series of recent experiments, scientists have transformed cells from mouse embryos into skin, heart muscle, and even eggs. In addition to providing insight into how such tissues develop, these feats have renewed the political and ethical debate over whether similar experiments should be conducted with cells derived from human embryos.

Known as embryonic stem cells, the lab-grown mouse cells are unspecialized and can grow in lab dishes seemingly forever. Scientists at the University of Pennsylvania created apparently normal mouse eggs from such stem cells, according to a report in the May 23 Science. While observing batches of stem cells, the biologists detected a small number of cells that began to display a genetic marker of egg cells.

Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.

This article is available only to subscribing members. Join SSP today or Log in.