Medical Discovery News, March 29, 2008 Saturday's edition of Medical Discovery News, by UTMB Professors Norbert Herzog and David Niesel, focused on irritable bowel diseases. Scientists do not know the cause of IBD but they believe the immune system is turned on but doesn't shut off. There's hope genetic work will lead to effective treatment. Medical Discovery News airs at 10 a.m. on KUHF-FM in Houston. The program is aired by 48 radio stations.