Latest Issue of Science News


Cloning Milestone: Monkey embryos urged to stem cell stage

Researchers have coaxed cloned rhesus macaque embryos to grow to the blastocyst stage, a developmental benchmark in which cells form a hollow, fluid-filled ball. The accomplishment marks the furthest point that scientists have yet reached in cloning a nonhuman primate.

Scientists have long been interested in human cloning as a therapeutic tool. Unlike reproductive cloning, which is meant to create genetically identical organisms, therapeutic cloning aims to grow embryonic stem cells into tissue that matches a patient's genetic signature.

Scientists have proposed stem cells as a means to treatments for a wide range of diseases, including Parkinson's and diabetes.

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.