Heart Cells That Beat When Light Shines Could Drive Pacemakers of the Future

80beatsBy Valerie RossAug 16, 2011 11:29 PM


Sign up for our email newsletter for the latest science news

With optogenetics, a technique that uses beams of light to control the activity of particular cells, researchers have already flicked on clusters of neurons that trigger aggressive behavior and ramped up insulin production in mice. Now, scientists are applying the technique to the heart, working towards a cardiac pacemaker driven by light, Courtney Humphries reports in Technology Review. First, the researchers genetically modified animal cells so they responded to light. Then, they took advantage of heart muscle cells' natural tendency to pair up, and coupled the modified cells to heart muscle cells. Pulses of light triggered a "heartbeat" in both types of cells---suggesting that a small cluster of modified cells might be enough to keep pace for the whole heart. Light-powered pacemakers are a long way from ready for the clinic, but the approach could use less power than artificial pacemakers, and give doctors more control over exactly where and when the pacemaker kicks in. Read more at Technology Review.

Image courtesy of Heikenwaelder / Wikimedia Commons

1 free article left
Want More? Get unlimited access for as low as $1.99/month

Already a subscriber?

Register or Log In

1 free articleSubscribe
Discover Magazine Logo
Want more?

Keep reading for as low as $1.99!


Already a subscriber?

Register or Log In

More From Discover
Recommendations From Our Store
Shop Now
Stay Curious
Our List

Sign up for our weekly science updates.

To The Magazine

Save up to 40% off the cover price when you subscribe to Discover magazine.

Copyright © 2023 Kalmbach Media Co.