I realize this is about rheumatoid arthritis but many of the same treatments are used for RA as Crohn's and since the immune response/process is much the same for both diseases this new discovery could have some hope for us as well.
http://www.sciencedaily.com/releases/2010/01/100128130223.htm
http://www.sciencedaily.com/releases/2010/01/100128130223.htm