Update on romosozumab: a humanized monoclonal antibody to sclerostin

Abstract

Introduction: Disorders with inactivating mutations of the SOST gene result in reduced or absent expression of sclerostin and are associated with high bone mass. Sclerostin is an important regulator of bone formation due to its inhibitory actions in the osteoanabolic Wnt signaling pathway. Advances in understanding the mechanisms of action of this signaling molecule have led to the development of a pharmacological inhibitor of sclerostin with potential clinical applications as an osteoanabolic drug for the treatment of osteoporosis.

Areas covered: Romosozumab is the first humanized monoclonal sclerostin antibody to be tested in clinical trials. Similar to preclinical animal studies with sclerostin antibodies, initial clinical studies show that romosozumab increases bone formation and bone mineral density.

Expert opinion: Blocking sclerostin action with romosozumab is a promising new therapeutic approach to osteoanabolic therapy of osteoporosis; efficacy and safety data on large controlled studies are awaited.

Keywords::

• anabolic
• monoclonal antibody
• osteoporosis
• romosozumab
• sclerostin

Declaration of interest

A Costa has no disclosures. In the past year, EM Lewiecki has received institutional grant/research support from Amgen, Merck, and Eli Lilly; he has served on scientific advisory boards for Amgen, Merck, Eli Lilly, Radius Health, and AgNovos Healthcare. JP Bilezikian has received research support from Amgen and NPS Pharmaceuticals. He serves on Advisory Boards for Amgen, Merck, Eli Lilly, NPS, Radius, and Bristol Meyers Squibb. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.

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