X

Why a Gene Mutation Makes Mice Obese

Mutation stops hormone signals getting to brain
By Mark Russell,  Newser Staff
Posted Mar 19, 2012 8:27 AM CDT

(Newser) – Scientists have discovered why an obesity-linked genetic mutation causes mice to overeat, leading to hopes the discovery could ultimately produce to new ways to fight fat, reports the BBC. After eating, hormones like leptin and insulin are supposed to let the brain know that we're full, and can stop eating. But this mutation prevented mice from getting the message; they ate as much as 80% more food than normal.

story continues below

And now researchers know why. "If there is a problem with the BDNF gene, neurons can't talk to each other, and the leptin and insulin signals are ineffective, and appetite is not modified," said one of the scientists. The hope now is that finding drugs that affect the BDNF gene "may open up novel strategies to help the brain control body weight." But don't get too excited: One genetics and obesity expert not associated with the study notes that this specific mutation is rarely seen in humans. (Read more obesity stories.)

We use cookies. By Clicking "OK" or any content on this site, you agree to allow cookies to be placed. Read more in our privacy policy.
Get the news faster.
Tap to install our app.
X