The wingless in Drosophila and integrated in vertebrate (Wnt) sig naling pathway is a crucial regulator of osteoblast recruitment Sclerostin is an inhibitor of this pathway, thereby in hibiting osteoblast recruitment and decreasing bone formation [27] The use of romosozumab, a sclerostin antibody which possesses ana bolic properties, is currently in Phase III trials for the treatment of post-menopausal osteoporosis. Based on pooled clinical trial data the use of a monthly, 210-mg, subcutaneous dose of romosozumab resulted in an 11.3% increase in the BMD of the lumbar spine and
a 4.1% increase in the BMD of the total hip [24]. Based on the marked improvements noted in BMD for the treatment of post-menopausal osteoporosis, similar success in using romosozumab to improve bone density in patients with ABD may be promising.