The Numb Gene Suppresses Myostatin (IMAGE) Arizona State University Caption ASU researchers found that the Numb gene suppresses Myostatin, another gene that limits muscle growth and can cause muscle atrophy. Credit Alan Rawls Usage Restrictions with image credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.