Latest Issue of Science News


Neurons take charge to change messages

Neurons in a developing embryo respond to changes in their own electrical activity by altering the types of chemical messengers that they produce, a new study suggests. This finding counters the traditional scientific view that genes alone determine which neurotransmitters a brain cell synthesizes.

A team led by Laura N. Borodinsky and Nicholas C. Spitzer, both of the University of California, San Diego, first measured distinctive patterns of electrical activity in each of four types of embryonic neurons in the spinal cords of frogs. The researchers then changed the electrical activity in such cells in other frog embryos by genetically engineering them to pass either more or less current through their membranes.

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.