Amyotrophic lateral sclerosis may involve a form of sudden, rapid aging of the immune system

Amyotrophic lateral sclerosis may involve a form of sudden, rapid aging of the immune system 
Studies in laboratory mice and humans suggest that the immune system ages prematurely and malfunctions 
http://www.eurekalert.org/pub_releases/2009-10/cmc-als100809.php
 
"Premature aging of the immune system appears to play a role in the development of amyotrophic lateral sclerosis (ALS), or Lou Gehrig's disease, according to research scientists from the Maxine Dunitz Neurosurgical Institute at Cedars-Sinai Medical Center, the Weizmann Institute of Science in Israel, and Sheba Medical Center in Israel."