http://asp.cumc.columbia.edu/facdb/profile_list.asp?DepAffil=Genetics&uni=gk2172
From the page: “In another line of research the molecular elucidation of two known human genetic diseases allowed us to identify another novel physiological loop this one linking bone and the GI tract. Indeed, we have shown recently that gut-derived serotonin is a hormone whose main function is to inhibit bone formation by osteoblast. Because we have elucidated the entire molecular cascade from the synthesis of the hormone to its target genes in osteoblast we are now in a position to test the therapeutic relevance of this pathway in the treatment of osteoporosis. This work on serotonin has triggered a more general interest in the lab about the possible role and mechanism of action of brain-derived serotonin in the control of bone mass. These projects focused on serotonin regulation of bone mass and address both basic physiological functions and its potential therapeutic outcome in humans.”